EMH350PD22-EF

- 250 W & 350 W Forced-cooled 

- Industry Standard 3”x 5”x 1.43”Format 

- • IT & Medical (BF) Approvals 

- 80 V - 275 VAC Operation 

- • Optional ORing Diode (EMH350D Models) • Analog & PMBus Signals Options (EMH350) • 5 V Standby (EMH350) • 3 Year Warranty 

The EMH series of ultra compact high power density supplies deliver 250 W and 350W within the industry standard 3” x 5” (76mm x 127mm) footprint. They achieve this very high power density with a minimal 12 CFM forced air requirement and a profile of  just 1.4” (36 mm) making them suitable for 1U and a host of other applications. 

All models feature a main output and 12V/0.6A fan supply output along with IEC60950 (IT) and IEC60601 BF (Medical) family safety approvals, thus including patient contact equipment in the wide range of possible applications. 

The EMH350 has a 5V/2A standby rail and can be supplied with a range of optional analogue and digital, PMBus compatible signals as well as a variable speed fan & cover. The EMH350D models have built in Oring diodes for use in redundant applications. 

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## **Models** and Ratings& Ratings 

|Output Voltage V1|Output Current V1|Fan Supply V3(1)|Output Power|Model Number(1)|
|---|---|---|---|---|
|12 V|21.0 A|12 V/0.6 A|252 W|EMH250PS12|
|18 V|14.0 A|12 V/0.6 A|252 W|EMH250PS18|
|24 V|10.5 A|12 V/0.6 A|252 W|EMH250PS24|
|48 V|5.2 A|12 V/0.6 A|250 W|EMH250PS48|
|Output Voltage V1<br>Output Current V1<br>StandbySupplyV2<br>Fan SupplyV3(2)<br>Output Power<br>Model Number(2)<br>12 V<br>29.2 A<br>5.0 V / 2.0 A<br>12 V/0.6 A<br>354 W<br>EMH350PS12<br>18 V<br>19.5 A<br>5.0 V / 2.0 A<br>12 V/0.6 A<br>354 W<br>EMH350PS18<br>24 V<br>14.6 A<br>5.0 V / 2.0 A<br>12 V/0.6 A<br>355 W<br>EMH350PS24<br>48 V<br>7.3 A<br>5.0 V / 2.0 A<br>12 V/0.6 A<br>354 W<br>EMH350PS48<br>Output Voltage V1<br>Output Current V1<br>StandbySupplyV2<br>Fan SupplyV3<br>Output Power<br>Model Number(3)<br>12 V<br>29.2 A<br>5.0 V / 2.0 A<br>12 V/0.6 A<br>354 W<br>EMH350PS12D<br>18 V<br>19.5 A<br>5.0 V / 2.0 A<br>12 V/0.6 A<br>354 W<br>EMH350PS18D<br>24 V<br>14.6 A<br>5.0 V / 2.0 A<br>12 V/0.6 A<br>355 W<br>EMH350PS24D<br>48 V<br>7.3 A<br>5.0 V / 2.0 A<br>12 V/0.6 A<br>354 W<br>EMH350PS48D<br>~~pere~~|||||
|Notes:|||||
|1. The EMH250 is available with a top mounted fan cover option. Add suffix ‘-TF’ to model number e.g. EMH250PS12-TF. See mechanical drawing later in this|||||
|datasheet. The fan supply V3 is no longer available with this option as it is used to drive the fan.|datasheet. The fan supply V3 is no longer available with this option as it is used to drive the fan.||||



2. The EMH350 is available with various analog, digital signal and cover options. See availability table and mechanical drawing later in this datasheet. The fan supply V3 is no longer available with cover options as it is used to drive the fan. 

3. The EMH350D models are fitted with an integral ORing diode and are also available with various analog and digital signal options. See availability table and mechanical drawing later in this datasheet. Input Characteristics Characteristic Minimum Typical Maximum Units Notes & Conditions Input Voltage - Operating 80 115/230 275 VAC Derate output power < 90 VAC. See fig. 1 Input Frequency 47 50/60 63 Hz Power Factor >0.9 EN61000-3-2 class A compliant Input Current - No Load 0.05/0.03 A 115/230 VAC 2.6/1.3 115/230 VAC - EMH250 Input Current - Full Load 3.7/1.8 A 115/230 VAC - EMH350 Inrush Current 40 A 230 VAC cold start, 25 °C 5.8 EMH250 No Load Input Power 6.4 W EMH350 1.0 EMH350 with output inhibit (via signal option) Earth Leakage Current 90/160 250 μ A 115/230 VAC/50 Hz (Typ.), 264 VAC/60 Hz (Max.) ~~=ore~~ Input Protection F10 A/250 V internal fuse in both lines ~~ee~~ Derating Curve - All EMH250 & EMH350 models Figure 1 100 90 80 70 60 50 40 80 85 90 264 Input Voltage (VAC) 

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## Output Characteristics 

|Characteristic|Minimum|Typical|Maximum|Units|Notes & Conditions|
|---|---|---|---|---|---|
|Output Voltage - V1<br>~~ee~~|12<br>~~ee~~|~~ee~~|48<br>~~ee~~|VDC<br>~~ee~~|See Models and Ratings table<br>~~ee~~|
|Initial Set Accuracy<br>~~ee~~|~~ee~~|~~ee~~|±1 V1, ±5 V2<br>~~ee~~|%<br>~~ee~~|50% load, 115/230 VAC, V2 EMH350 only<br>~~ee~~|
|Output Voltage Adjustment<br>~~EE~~|±10 V1<br>~~EE~~|~~EE~~|~~EE~~|%<br>~~EE~~|Via potentiometer & PMBus control<br>~~EE~~|
|Minimum Load<br>~~EE~~|0<br>~~EE~~|~~EE~~|~~EE~~|A<br>~~EE~~|~~EE~~|
|Start Up Delay<br>~~a~~||1||s|230 VAC full load (see fig. 2, 3 & 4.)|
|Hold Up Time<br>~~a~~||16||ms|115 VAC full load (see fig. 5.)|
|Drift<br>~~a~~|||±0.2|%|After 20 min warm up|
|Line Regulation<br>~~a~~|||±0.5|%|90-264 VAC|
|Load Regulation<br>~~a~~<br>~~es~~||~~|.~~<br>|±1 V1, ±5 V2<br>~~|.|.~~<br>|%<br>~~|.~~<br>|0-100% load, V2 EMH350 only<br>~~|.~~<br>|
|Transient Response - V1<br>~~r+|.|...~~<br>~~es~~|~~r+|.|...~~<br>|~~r+|.|...~~<br>~~|.~~<br>|4<br>~~r+|.|...~~<br>~~|.|.~~<br>|%<br>~~r+|.|...~~<br>~~|.~~<br>|Recovery within 1% in less than 500μs<br>for a 50-75% and 75-50% load step<br>~~r+|.|...~~<br>~~|.~~<br>|
|Over/Undershoot - V1<br>~~es~~|~~nD~~|2<br>~~|.~~<br>~~nD~~|~~|.|.~~<br>~~(DQ~~|%<br>~~|.~~<br>~~(DQ~~|~~|.~~<br>~~(DQ~~|
|Ripple & Noise<br>~~es~~<br>~~ee~~|~~ee~~|~~|.~~<br><br>~~ee~~|1<br>~~|. |.~~<br><br>~~ee~~|% pk-pk<br>~~|.~~<br><br>~~ee~~|20 MHz bandwidth (see fig. 6 & 7.)<br>~~|.~~<br><br>~~ee~~|
|Overvoltage Protection<br>~~ee~~|115<br>~~ee~~|~~ee~~|140<br>~~ee~~|%<br>~~ee~~|Vnom DC.<br>~~ee~~|
|Overload Protection<br>~~a~~|110<br>~~GC~~|~~GC~~|150<br>~~GC~~|% I nom|Auto reset, knee point adjustable via PMBus control<br>(see fig.8) EMH350-50 only|
|Short Circuit Protection<br>~~I~~|~~I~~|~~I~~|~~I~~|~~I~~|Fitted<br>~~I~~|
|Temperature Coefficient<br>~~I~~<br>~~Ce~~|~~I~~|~~I~~<br>~~a~~|0.05<br>~~I~~<br>~~a~~|%/˚C<br>~~I~~|~~I~~|
|Overtemperature Protection<br>~~Ce~~||~~a~~|~~a~~|°C|Fitted, auto recovery|
|Patient Leakage Current<br>~~Ce~~||~~a~~|100<br>~~a~~|μA|264 VAC/60 Hz|



## Start up delay from AC turn on 

|Figure 2<br>V1 Start up example<br>(115 VAC, 686 ms)<br>Figure 3<br>V3 Fan supply example<br>(115 VAC, 530 ms)|V1<br>AC<br>V3<br>AC|
|---|---|



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## Output Characteristics 

Figure 4 V2 Standby Supply example (115 VAC, 75 ms) EMH350 only 

**==> picture [12 x 52] intentionally omitted <==**

**----- Start of picture text -----**<br>
V2<br>AC<br>**----- End of picture text -----**<br>


## Hold up time from loss of AC 

Figure 5 V1 Hold up time example (115 VAC, 22 ms) V1 AC 

## Output Ripple & Noise 

Figure 6 EMH350PS12, 350 W, (87 mV pk-pk ripple, 20 MHz bandwidth) 

**==> picture [10 x 7] intentionally omitted <==**

**----- Start of picture text -----**<br>
V1<br>**----- End of picture text -----**<br>


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## Output Characteristics 

Figure 7 EMH350PS24 350 W (85 mV pk-pk ripple, 20 MHz bandwidth) 

**==> picture [10 x 7] intentionally omitted <==**

**----- Start of picture text -----**<br>
V1<br>**----- End of picture text -----**<br>


## Overload Characteristics 

Figure 8 Typical Overload Characteristics (EMH350PS12 shown) 

**==> picture [199 x 8] intentionally omitted <==**

**----- Start of picture text -----**<br>
Current limit adjustable via PMBus control, EMH350-50 only<br>**----- End of picture text -----**<br>


**==> picture [408 x 213] intentionally omitted <==**

**----- Start of picture text -----**<br>
14.00<br>12.00<br>10.00<br>8.00<br>6.00<br>4.00<br>2.00<br>0.00<br>1 2 3 4 5 34 35 36 37 38 39 40<br>Current (A)<br>Voltage (V)<br>**----- End of picture text -----**<br>


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## General SpecificationsGeneral Specifications 

|Characteristic|Minimum|Typical|Maximum|Units|Notes & Conditions|
|---|---|---|---|---|---|
|Efficiency<br>~~RO~~<br>~~ee~~|~~RO~~<br>~~ee~~|87<br>~~CO~~<br>~~ee~~|~~CO~~<br>~~ee~~|%<br>~~CO~~<br>~~ee~~|Full load (see fig. 9 & 10)<br>~~ee~~|
|Isolation: Input to Output<br>Input to Ground<br>Output to Ground<br>~~ee~~<br>~~a~~|4000<br>~~ee~~|~~ee~~|~~ee~~|VAC<br>~~ee~~|~~ee~~|
||1500<br>~~ee~~<br>~~ee~~|~~ee~~<br>~~ee~~|~~ee~~<br>~~GG~~|VAC<br>~~ee~~<br>~~GG~~|~~ee~~<br>~~GG~~|
||1500<br>~~ee~~<br>~~ee~~<br>~~ee~~|~~ee~~<br>~~ee~~|~~ee~~<br>~~ee~~|VAC<br>~~ee~~<br>~~ee~~|~~ee~~<br>~~ee~~|
|Switching Frequency<br>~~ee~~<br>~~a~~|~~ee~~<br>~~ee~~|62-560 / 71 / 50-130<br>~~ee~~|~~ee~~|kHz<br>~~ee~~|PFC / Main Converter /<br>Standby Converter<br>~~ee~~|
|Power Density<br>~~a~~<br>~~a~~<br>~~ee~~|~~ee~~<br>~~OO~~<br>~~ee~~|~~OO~~<br>~~ee~~|16.3<br>~~OO~~<br>~~ee~~|W/in3<br>~~OO~~|~~OO~~|
|Mean Time Between Failure<br>~~ee~~<br>~~es~~|~~ee~~<br>~~ee~~|400<br>~~ee~~|~~ee~~|kHrs|MIL-HDBK-217F, Notice 2<br>+25 °C GB|
|Weight<br>~~ee~~<br>~~es~~|~~ee ~~<br>~~ee~~|0.9 (410)<br>1.0 (450)<br> ~~ee ~~|~~ee~~|lbs (g)|EMH250 & EMH350,<br>EMH350D|



## Efficiency Versus Load 

|Figure 9<br>EMH350PS12||90%<br>100%|90%<br>100%|~~ee~~|||
|---|---|---|---|---|---|---|
||||||||
||||80%||||
|||||115 V|||
||Efficiency||40%<br>50%<br>60%<br>70%|230 V<br>~~pOeT~~<br>~~ee~~|||
||||10%<br>20%<br>30%|~~Ceee~~|||
||||0%||||
|||||~~0~~<br>10<br>20<br>30<br>40<br>50<br>60<br>70<br>80<br>90<br>100|||
|Figure 10<br>EMH350PS48|Efficiency||50%<br>60%<br>70%<br>80%<br>90%<br>100%|230 V<br>115 V<br>~~BeSS~~<br>~~SSS~~<br>~~a~~<br>~~eee~~<br>~~ee~~|||
||||40%<br>0%<br>10%<br>20%<br>30%|~~Ce~~<br>~~Soeo~~<br>~~ee~~|||
|||||0<br>10<br>20<br>30<br>40<br>50<br>60<br>70<br>80<br>90<br>100|||



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## XxxxxxxxxxEnvironmental 

|Characteristic|Minimum|Typical|Maximum|Units|Notes & Conditions|
|---|---|---|---|---|---|
|Operating Temperature|0||+70|°C|Derate linearly from +50 °C at 2.5%/°C to<br>50% at 70 °C. (See Thermal Considerations)|
|Storage Temperature|-40||+85|°C||
|Cooling|12|||CFM|Forced-cooled, see Thermal Considerations<br>& Mechanical details|
|Humidity|5||95|%RH|Non-condensing|
|OperatingAltitude|||3000|m||
|Shock|||||3 x 30 g/11 ms shocks in both +ve & -ve<br>directions along the 3 orthogonal axis,<br>total 18 shocks.|
|Vibration|||||Three axis 5-500 Hz at 2 g x 10 sweeps|



## Electromagnetic Compatibility - Emissions 

||Phenomenon||Standard<br>Test Level<br>Criteria|Notes & Conditions|
|---|---|---|---|---|
||Conducted||EN55011/22<br>Class B||
||Radiated||EN55011/22<br>Class A|Using Wurth 742 700 790 ferrite with 3 turns<br>on input cable. See EMC report|
||Voltage Fluctuations||EN61000-3-3||
|Electromagnetic Compatibility - Immunity|||||
|Phenomenon<br>Standard<br>Test Level<br>Criteria<br>Notes & Conditions<br>Low Voltage PSU EMC<br>EN61204-3<br>High severity level<br>as below<br>Harmonic Current<br>EN61000-3-2<br>Class A<br>Radiated<br>EN61000-4-3<br>3<br>A<br>EFT<br>EN61000-4-4<br>3<br>A<br>Surges<br>EN61000-4-5<br>Installation class 3<br>A<br>Conducted<br>EN61000-4-6<br>3<br>A<br>Dips and Interruptions<br>EN61000-4-11<br>Dip:<br>30% 10 ms<br>A<br>Dip:<br>60% 100 ms<br>B<br>Dip: 100% 5000 ms<br>B<br>EN60601-1-2<br>(EN61000-4-11)<br>Dip:<br>30% 500 ms<br>A<br>Dip:<br>60% 100 ms<br>A<br>Requires load derating to approx 50% with<br>100 VAC input.<br>Dip:<br>100% 10 ms<br>A<br>Int.: >95% 5000 ms<br>B<br>~~SS~~<br>~~==~~<br>~~————~~|||||
||Safety Agency Approvals||||
||Safety Agency||Safety Standard|Category|
||CB Report||IEC62368-1:2014, IEC60950-1:2005 Ed 2|Information Technology|
||UL||UL62368-1:2014, CSA C22.2 No62368-1-14, UL60950-1 (2007), CSA 22.2<br>No.60950-1-07 Ed 2|Information Technology|
||TUV||EN62368-1:2014+A11:2017, EN60950-1:2006|Information Technology|
||CE||LVD||
||||||
||Safety Agency||Safety Standard|Category|
||CB Report||Certificate #US/18274/UL, IEC60601-1 Ed 3 Including Risk Management|Medical|
||UL||UL File # E146893, ANSI/AAMI ES 60601-1:2005 & CSA C22.2 No. 60601-1:08|Medical|
||TUV||TUV EN60601-1:2006|Medical|
|Means of Protection<br>Category<br>Primary to Secondary<br>2 x MOPP (Means of Patient Protection)<br>IEC60601-1 Ed 3<br>Primary to Earth<br>1 x MOPP (Means of Patient Protection)<br>Secondary to Earth<br>1 x MOPP (Means of Patient Protection)<br>~~SSS~~|||||
|Equipment Protection Class<br>Safety Standard<br>Notes & Conditions<br>Class I & BF<br>IEC60950-1:2005 Ed 2 & IEC60601-1 Ed 3<br>See safety agency conditions of<br>acceptability for details<br>~~|~~|||||



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## Signals 

||||Signal Functions Available<br>Optional Cover Availability|
|---|---|---|---|
|Model|Remote<br>Sense|Fan Supply<br>5 V Standby<br>AC OK/Power<br>Fail<br>Inhibit V1 &<br>V Fan<br>Current Share<br>Variable Speed<br>Fan Control<br>PMBus<br>Standard Top<br>Fan (-TF)<br>Variable Speed<br>Top Fan (-VF)||
|EMH250PSXX<br>P<br>P<br>P<br>EMH350PSXX<br>P<br>P<br>P<br>P<br>EMH350PSXX-01<br>P<br>P<br>P<br>P<br>P<br>P<br>P<br>EMH350PSXX-02<br>P<br>P<br>P<br>P<br>P<br>P<br>P<br>P<br>EMH350PSXX-50<br>P<br>P<br>P<br>P<br>P<br>EMH350PSXXD<br>P<br>P<br>P<br>EMH350PSXXD-01<br>P<br>P<br>P<br>P<br>P<br>P<br>EMH350PSXXD-50<br>P<br>P<br>P<br>P<br>~~ee~~<br>~~eG es~~<br>~~po~~<br>~~po~~<br>~~po~~<br>~~po~~<br>~~Ce eeGeOe~~<br>~~poa~~<br>~~ee~~||||
|Characteristic|||Notes & Conditions|
|**Signals & Control**||||
|Remote Sense|||Compensates for 0.5 V total voltage drop|
|12 V Fan Supply (V3)|||12 V/0.6 A supply, present when AC supplied, inhibit turns fan supply off.|
|5V Standby (V2)|||5 V/2 A supply, always present when AC supplied|
|AC OK/Power Fail|||AC OK is an open collector transistor, referenced to negative output, providing a minimum of 3 ms warning of loss of output<br>regulation. The transistor is normally on when AC is healthy. See fig. 11.|
|Inhibit|||The inhibit high pin should be pulled below 0.4 V to switch V1 & V Fan (V3) off. Open circuit or 2-8 V maximum to switch the<br>output on. See fig.12.|
|Current Share|||Connecting pin 9 (-01 & -02 models) of like voltage units (3 maximum) will force the current to share between the outputs.<br>Units share current within 10% of each other at full load. See fig. 13.|
|Variable Speed Fan Control|Variable Speed Fan Control||When used in conjuction with -VF fan cover, varies the speed of the internal fan depending on temperature of the unit.<br>See fig. 15.|
||||The I2C PMBus compatible interface can be used for monitoring the unit output voltage, current, internal temperature,|
|I2C/PMBus|||external 3 wire TACHO fan and run time. Adjustment of the output voltage and current limit set point and identification of the|
||||unit model number and serial number are also possible. Consult sales for further information and application notes.|



## AC OK Power Fail 

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**----- Start of picture text -----**<br>
AC OK Power Fail Inhibit Parallel & Current Share<br>(EMH350 recommended connection)<br>Figure 11 Figure 12 Figure 13<br>----------- POWER SUPPLY joo oe POWER SUPPLY cee- EMH350PSXX  (1)V1 Output EMH350PSXX  (2)V1 Output EMH350PSXX  (3)V1 Output<br>5 V Standby  Pin 3 or 4 - + Current - + Current - +<br>1 K Share Share<br>Max 30 V 10 mA Inhibit Hi<br>AC OK Collector  Pin 10<br>Pin 11<br>Transistor On (<0.8 V):<br>a' AC OKTransistor Off (>4.5 V): RS lee<br>AC OK Emitter  AC NOT OK/Power Fail Inhibit Lo<br>-VE output Pin 8 (-sense)<br>1 5V Standby return | \ INA .<br>pin 1 or 2<br>- +<br>J2 Logic Connector Signals Connector<br>~ Load<br>+ Sense - Sense<br>- Sense + Sense<br>- Sense + Sense<br>**----- End of picture text -----**<br>


**==> picture [31 x 7] intentionally omitted <==**

**----- Start of picture text -----**<br>
Figure 11<br>**----- End of picture text -----**<br>


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## Signals 

## Redundancy N+1 

(EMH350 recommended connection) Figure 14 

**==> picture [174 x 117] intentionally omitted <==**

**----- Start of picture text -----**<br>
EMH350PSXXD  (1) EMH350PSXXD  (2) EMH350PSXXD  (3)<br>V1 Output V1 Output V1 Output<br>- + - + - +<br>- +<br>Load<br>**----- End of picture text -----**<br>


**==> picture [519 x 478] intentionally omitted <==**

**----- Start of picture text -----**<br>
Fan Speed Graph 100<br>Figure 15 90 ee<br>80 a ee<br>70 eeee<br>60 ee ee ee ee<br>50 a<br>40 es<br>30 ee (<br>20 ee<br>10 ee ee QO<br>0 eeeeee eee eee<br>0 10 20 30 40 50 60<br>H/Sink Temp °C<br>Mechanical Details<br>©<br>EMH250<br>5.0 (127.0) —___~ ©<br>0.22(5.7) 4.55 (115.6) Signals Connector*<br>Output Connector<br>Center Line<br>Output Adjust<br>Recommended<br>Airflow  2.55 C3<br>Direction C5 (64.8)<br>3.0<br>(76.2) -V1 Con 3<br>= Input Terminal Block Center Line parC |) (16.7)0.65 ce Output TerminalsM4 Pan HD screws<br>(pin 1) LN L N T1 +V1 Con 2 in 2 positionsTorque to 8 lbs-in (90 cNm) max<br>0.73 E E 0.90<br>(18.6) (23.0)<br>M3 mounting holes in 4 positions<br>Input Terminal  © D5 0.22 (5.7) Output Connector<br>Block CON 1 Center Line<br>0.35<br>(9.1)<br>1.43<br>(36.3)<br>*Signals Connector<br>TOP VIEW<br>(pin 2) N/C N/C (pin 1)<br>Input Connector CON 1  Output Connector  N/C N/C<br>TYCO part # 640445-5 Con 2 +V1 Fan -VE Fan +VE<br>Pin 1 Line Con 3 -V1 -VE Sense + VE Sense<br>Pin 3 Neutral (pin 10) N/C N/C  (pin 9)<br>E<br>Pin 5 Earth<br>Signals Connector 10 way 2 mm pitch p/n JST BI0B-PHDSS<br>Pin 2 & 4 removed  Mating Half - p/n JST PHDR-10VS,<br>Contact- 26-22 AWG p/n JST SPHD-001T-P0.5<br>Mates with Tyco SL-156 Series Connector<br>Fan Speed (%)<br>**----- End of picture text -----**<br>


## **Notes** 

1. Dimensions shown in inches (mm). Tolerance: ±0.02 (±0.5) 

3. Mounting holes marked with must be connected to safety earth for optimum EMC performance. 

2. Weight: 0.90 lb (410 g). 

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## XxxxxxxxxxMechanical Details 

## EMH350 

**==> picture [472 x 246] intentionally omitted <==**

**----- Start of picture text -----**<br>
5.0 (127.0)<br>Signals Connector*<br>© rc OT ©<br>Output Connector<br>Center Line<br>Recommended Output Adjust<br>Airflow<br>Direction C5 2.55 C3<br>Input Terminal Block Center Line ye | (64.8) | (76.2)3.0 a -V1 Con 3<br>0.65 Output Terminals<br>(18.6)0.73 (pin 1) L N E LNE T1 (23.0)(16.7)0.90 +V1 Con 2 M4 Pan HD screwsin 2 positionsTorque to 8 lbs-in (90 cNm) max<br>0.22 (5.7)<br>© M3 mounting holes in 4 positions D5 Output ConnectorCenter Line 0.35 Output Connector<br>Input Terminal Block CON 1 0.22 4.55 (115.6) (9.1) CON 2 +V1<br>(5.7)<br>CON 3 -V1<br>(pin 2) +VE Standby   +VE Standby (pin 1)<br>-VE Standby   -VE Standby<br>Fan -VE Fan +VE Input Connector CON 1<br>-VE Sense + VE Sense TYCO part # 640445-5<br>1.43<br>(36.3) (pin 10) N/C N/C (pin 9) 1 Line<br>*Signals Connector Top View 3 Neutral<br>Signals Connector 10 way 2 mm<br>pitch p/n JST BI0B-PHDSS 5 Earth<br>Mating Half - p/n JST PHDR-10VS,<br>Contact- 26-22 AWG p/n  Pins 2 & 4 removed<br>JST SPHD-001T-P0.5<br>Mates with Tyco SL-156<br>Series Connector<br>**----- End of picture text -----**<br>


## EMH350 (Signal Options) 

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5.0 (127.0)<br>Signals Connector*<br>Output Connector  Pin 1<br>Center Line<br>Recommended Voltage Adjust<br>av Airflow  PE R  VEE aa<br>Direction 2.55 3.0<br>Input Terminal  (64.8) (76.2) -V1 Con 3<br>Block Center Line 0.65 Output Terminals<br>(pin 1) L (16.7) +V1 Con 2 M4 Pan HD screwsin 2 positions<br>N Torque to 8 lbs-in<br>0.73 E 0.90 (90 cNm) max<br>(18.6) (23.0)<br>0.22 (5.7)<br>Output Connector Center Line<br>M3 mounting holes in 4 positions<br>S TO 0.35 (9.1) =<br>0.22 4.55 (115.6)<br>Input Terminal Block  (5.7)<br>CON 1<br>1.43<br>(36.3)<br>hee ce 3<br>Pin 11 Pin 12 EMH350PSXX-01 & EMH350PSXX-02<br>Pin 9 Pin 10 1 -VE Standby 2 -VE Standby<br>3 +VE Standby 4 +VE Standby<br>Pin 7 Pin 8 5 +VE Fan Supply 6 -VE Fan Supply<br>Pin 5 Pin 6 7 +VE Sense 8 -VE Sense<br>9 Current Share 10 Inhibit<br>Pin 3 Pin 4<br>11 Power Fail 12 N/C<br>Pin 1 Pin 2<br>EMH350PSXX-50<br>1 -VE Standby 2 -VE Standby<br>Signals Connector 12 way 2 mm  3 +VE Standby 4 +VE Standby<br>pitch p/n JST S12B-PHDSS 5 +VE Fan Supply 6 -VE Fan Supply<br>Mating Half - p/n JST PHDR-12VS, 7 +VE Sense 8 -VE Sense<br>Contact- 26-22 AWG p/n  9 Fan Tacho Input 10 I [2] C GND<br>JST SPHD-001T-P0.5<br>a 11 I [2] C Data 12 I [2] C Clock<br>**----- End of picture text -----**<br>


## **Notes** 

> 3. Mounting holes marked with ~~-~~ must be connected to safety earth for optimum EMC performance. 

1. Dimensions shown in inches (mm). Tolerance: ±0.02 (±0.5) 

2. Weight: 0.90 lb (410 g). 

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## Xxxxxxxxxx **Mechanical Details** 

## EMH350D 

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5.75 ±0.02 (146.0 ±0.5)<br>Output Connector Signals Connector*<br>Center Lines<br>Output Adj.<br>C5<br>Recommended<br>a (64.8)2.55 Direction S| Airflow  HeySe | 3.00 ±0.02(76.2 ±0.5) 0.72 =| -V1 Con 3 Output Terminals<br>(pin 1) LN T1 (18.3) +V1 Con 2 M4 Screw in 2 positionsTorque to 8 lbs-in(90 cNm) max.<br>0.73 E 0.91<br>(18.6) (23.1)<br>Input Terminal Block,Center Line / M3 mounting holes in 4 positions D5 0.22 (5.7) Output ConnectorCenter Lines 0.35 (9.1)<br>Input Terminal Block 4.55 (115.6) 0.97<br>CON 1 (24.7) Output Connector<br>(pin 2) +VE Standby   +VE Standby (pin 1)<br>CON 2 +V1<br>-VE Standby   -VE Standby<br>Fan -VE Fan +VE CON 3 -V1<br>—<br>1.43 ±0.02 -VE Sense + VE Sense<br>(36.3 ±0.5) (pin 10) N/C N/C (pin 9)<br>**----- End of picture text -----**<br>


Output Connector CON 2 +V1 CON 3 -V1 ~~—~~ Input Connector CON 1 TYCO part # 640445-5 1 Line 3 Neutral 5 Earth 

*Signals Connector Top View Signals Connector 10 way 2 mm pitch part number JST B10B-PHDSS, Mating half part number JST PHDR-10VS, Contact 26-22 AWG part number JST SPHD-001T-P0.5 

Pins 2 & 4 removed Mates with Tyco SL-156 Series Connector 

## EMH350D (Signal Options) 

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5.75 ±0.02 (146.0 ±0.5)<br>*Signal Connector<br>Pin 1<br>Output Adj.<br>Output Connector<br>Center Lines<br>Recommended<br>2.55 Airflow  3.00 ±0.02 -V1 Con 3<br>RecommendedAirflow  (64.8) Direction(pin 1) L (76.2 ±0.5) (18.3)0.72 Output TerminalsM4 Screw in 2 positions<br>Direction (18.6)0.73 NE (23.1)0.91 +V1 Con 2 Torque to 8 lbs-in(90 cNm) max.<br>Input Terminal Block, M3 mounting holes in 4 positions<br>Center Line © 0.22 (5.7) Output Connector 0.35 (9.1)<br>Input Terminal Block Center Lines<br>4.55 (115.6) 0.97<br>(24.7)<br>1.43 ±0.02 (36.3 ±0.5)<br>EMH350PSXXD-01<br>Pin 11 Pin 12 1 -VE Standby 2 -VE Standby<br>Hdilee (igo aoe: Pin 9 1 #4 Pin 10 3 +VE Standby 4 +VE Standby<br>5 +VE Fan Supply 6 -VE Fan Supply<br>Pin 7 Pin 8 7 +VE Sense 8 -VE Sense<br>Pin 5 Pin 6 9 Current Share 10 Inhibit<br>Pin 3 Pin 4 11 Power Fail 12 N/C<br>Pin 1 Pin 2 EMH350PSXXD-50<br>1 -VE Standby 2 -VE Standby<br>Signals Connector 12 way 2 mm  3 +VE Standby 4 +VE Standby<br>pitch p/n JST S12B-PHDSS 5 +VE Fan Supply 6 -VE Fan Supply<br>Mating Half - p/n JST PHDR-12VS, 7 +VE Sense 8 -VE Sense<br>Contact- 26-22 AWG p/n  9 Fan Tacho Input 10 I [2] C GND<br>JST SPHD-001T-P0.5 11 I [2] C Data 12 I [2] C Clock<br>**----- End of picture text -----**<br>


## **Notes** 

1. Dimensions shown in inches (mm). Tolerance: ±0.02 (±0.5) 

   3. Mounting holes marked with ~~=e~~ must be connected to safety earth for optimum EMC performance. 

2. Weight: 1.0 lbs (450 g). 

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## Xxxxxxxxxx **Mechanical Details** 

## Top Fan - EMH250-TF & EMH350-TF 

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5.00 ±0.02 (127.0 ±0.5) M3 mounting holes in 4 positions<br>Max. penetration by screw to be 0.157 (4.0)<br>from outside face of chassis<br>| |<br>Signals Connector*<br>Input Terminal<br>Block, Center Line OSA 1) ae<br>3.56 ±0.02<br>(90.4 ±0.5) -V1 Con 3 Output TerminalsM4 Screw in 2  (50.0)1.96<br>(pin 1) L 1.84 positions<br>N (46.8) +V1 Con 2 Torque to<br>(21.015.6) E , we Lp (30.1)1.19 ies} S 8 lbs-in(90 cNm) max. | (20.2)0.76<br>0.79 0.75<br>(19.9) (19.1) 3.50 (88.9)<br>Input Terminal BlockCON 1 M3 mounting holes in 2 positionsMax. penetration by screw to be 0.157 (4.0) from outside face of chassis<br>2.78 ±0.02 (pin 2) +VE +VE (pin 1)<br>(70.5 ±0.5) -VE -VE<br>Fan -VE Fan +VE<br>0.97<br>(24.8) -VE Sense +VE Sense<br>(pin 9) N/C N/C (pin 10)<br>(19.1)0.75 3.50 (88.9)<br>Signals Connector<br>Signals Connector 10 way 2 mm pitch<br>part number JST B10B-PHDSS<br>Mating half part number JST PHDR-10VS<br>Contact 26-22 AWG part number JST SPHD-001T-P0.5<br>**----- End of picture text -----**<br>


## Top Fan with Signals Options - EMH350-01TF, EMH350-50TF & EMH350-02VF 

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5.00 ±0.02 (127.0 ±0.5)<br>Signals Connector*<br>Pin 1<br>M3 mounting holes in 4<br>Input TerminalBlock, Center Line(pin 1) LN ) K e n LI 3.56 ±0.02(90.4 ±0.5) (46.8)1.84 es} -V1 Con 3+V1 Con 2 S Output TerminalsM4 Screw in 2 positionsTorque to  | ai positions. Max. penetration by screw to be 0.157 (4.0) from outside face of chassis (50.0)1.96<br>(25.6)1.01 E (30.1)1.19 8 lbs-in(90 cNm) max. (20.2)0.76<br>Input Terminal BlockCON 1 M3 mounting holes in 2 positions (19.9)0.79 (19.1)0.75 3.50 (88.9)<br>Max. penetration by s crew to be 0.157 (4.0) from outside face of chassis<br>EMH350PSXX-01TF &<br>EMH350PSXX-02VF<br>2.78 ±0.02 Pin 11 Pin 12 1 -VE Standby 2 -VE Standby<br>(70.5 ±0.5) Pin 9 Pin 10 3 +VE Standby 4 +VE Standby<br>5 +VE Fan Supply 6 -VE Fan Supply<br>0.97 Pin 7 Pin 8 7 +VE Sense 8 -VE Sense<br>(24.8) Pin 5 Pin 6 9 Current Share 10 Inhibit<br>11 Power Fail 12 N/C<br>0.75 Pin 3 Pin 4<br>7 (19.1) 3.50 (88.9) Pin 1 EE Pin 2 EMH350PSXX-50TF<br>1 -VE Standby 2 -VE Standby<br>Signals Connector 12 way 2 mm pitch p/n JST S12B-PHDSS 357 +VE Fan Su+VE Standb+VE Senseppyly 468 -VE Fan Su+VE Standb-VE Senseppyly<br>Mating Half - p/n JST PHDR-12VS, 9 Fan Tacho Input 10 I [2] C GND<br>Contact- 26-22 AWG p/n  11 I [2] C Data 12 I [2] C Clock<br>JST SPHD-001T-P0.5 - ——<br>**----- End of picture text -----**<br>


## **Notes** 

1. Dimensions shown in inches (mm).  Tolerance: ±0.02 (±0.5) 

2. Weight: 1.67 lbs (760 g). 

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## Xxxxxxxxxx **Thermal Considerations** 

In order to ensure safe operation of the PSU in the end-use equipment, the temperature of the components listed in the table below must not be exceeded. Temperature should be monitored using K type thermocouples placed on the hottest part of the component (out of any direct air flow). See mechanical drawings for component locations. 

The service life of the power supply is largely determined by the temperature of the electrolytic capacitors during normal operation and therefore to 

achieve the optimum lifetime, it is recommended to reduce the temperatures shown by approximately 30 °C. 

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Temperature Measurements (Ambient  ≤ 50 °C)<br>Component Max Temperature ºC<br>D5 case 110 °C<br>C5 105 °C<br>C3 105 °C<br>T1 coil 120 °C<br>———<br>**----- End of picture text -----**<br>


## Service Life (U Channel Versions) 

The estimated service life of the EMH Dual Series is determined by the cooling arrangements and load conditions experienced in the end application. Due to the uncertain nature of the end application this estimated service life is based on the actual measured temperature of a key capacitor within the product when installed in the end application. 

The graph below expresses the estimated lifetime for a given component temperature and assumes continuous operation at this temperature. 

## Estimated Service Life vs Component Temperature 

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120000<br>100000<br>80000<br>60000<br>40000<br>20000<br>0 —z<br>105 95 85 75 65 55<br>C5 Temperature (°C)C6 Temperature (°C)<br>Lifetime (Hrs)<br>**----- End of picture text -----**<br>


16 Dec 2020