SL1021B090R

**Gas Discharge Tube (GDT) Products** SL1021A/B, SL1024A/B and PMT8 Series 

> ® Al 

## **SL1021A/B, SL1024A/B and PMT8 Series** 

## ~~**Description** Lo~~ 

GDT circuit protection devices dissipate electrical surge energy safely within a contained plasma gas. Commonly used to help protect sensitive telecom and networking equipment and lines, GDTs protect from damage that may result from lightning strikes and equipment switching operations. 

The Littelfuse GDT series described in this document are available in a variety of leaded and surface mount forms and offered with and without optional failsafe clip. Please refer to the electrical specifications, dimension and packaging options section of this document for additional information. 

~~**Agency Approvals** Lo~~ AGENCY AGENCY FILE NUMBER ® E128662 ~~——~~ 

## **SL1021A/B and SL1024A/B Series:** 

SL1021A/B and SL1024A/B series GDTs are designed to offer high levels of performance on fast rising transients in the range of 100V/μS to 1KV/μS, which are those most likely created by induced lightning disturbances. 

These devices feature ultra low capacitance (typically 1.5pF or less) and are extremely robust with SL102xA devices able to divert a 10,000 Amp pulse without destruction, and SL102xB suffix devices able to divert a 20,000 Amp pulse without destruction. 

## ~~**3 Electrode GDT Graphical Symbol** Lo~~ 

a b a = TIP b = RING e = GROUND (center electrode) e 

These series offer optimized internal geometry which provide low insertion loss at high frequencies, ideal for the protection of broadband and other high speed transmission equipment. 

## ~~**Features** Lo~~ 

## **PMT8 Series:** 

PMT8 GDT's are telecom grade devices designed to meet the recommendations in CCITT-K12 and Bellcore GR-1361-CORE. The three electrode configuration is used in applications where simultaneous crowbar action of two signal lines is required. 

- RoHS compliant 

   - 10KA (A suffix devices) / 20KA (B suffix devices) surge capability tested with 8/20μs pulse as defined by IEC 61000-4-5 

- Low insertion loss 

- Excellent response to fast rising transients 

- Ultra low capacitance 

• Available with thermal ~~**Product Characteristics**~~ failsafe option (add ‘F’ suffix to part number) Dull Tin Plate 17.5 ± 12.5 Microns. **Materials** with ceramic insulator ‘LF’ mark, voltage& date code: **Product Marking** SL102x **A - Red** /White text **PMT8:** SL102x **B & PMT8 - Blue** /White text • Telecom network **Glow to arc** interfaces **transition current** ~ 1Amp •  Telephone line cards **Glow Voltage** ~60-200 Volts •  Repeaters **Storage and Operation** -40 to +90°C •  Modems **Temperature** •  Line test equipment **Transverse Voltage** < 0.2μSec (Tested to ITU-T Rec. K.12) **(Delay Time) Arc Voltage** ~10 to 35 Volts **Holdover Voltage** <150mS (Tested to ITU-T Rec. K.12) ~~.~~ **19 SL1021A/B, SL1024A/B and PMT8 Series** Revised: November 10, 2009 

## ~~**Applications**~~ 

## **SL1021 / SL1024:** 

- Broadband equipment 

- ADSL equipment 

- XDSL equipment 

- Satellite and CATV equipment 

- Splitters 

- General telecom equipment 

©2009 Littelfuse, Inc. 

**SL1021A/B, SL1024A/B and PMT8 Series** 

Specifications are subject to change without notice. Please refer to www.littelfuse.com for current information. Customer should verify actual device performance in their specific applications. 

**Gas Discharge Tube (GDT) Products** SL1021A/B, SL1024A/B and PMT8 Series 

## ~~**Electrical Characteristics**~~ 

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Device Specifications  (at 25°C) Life Ratings<br>DC Voltage DC  DC  Capaci- Insulation  AC  Surge  Max  Max Single  Surge Life<br>Part  100V/Sec. Voltage  Voltage tance  Resistance Current Current Single  Surge 10/1000<br>Number* 100 V/ 1kV/ 50Hz  8/20μSec Surge<br>MIN TYP MAX μSec. μSec. (@1Mhz) MIN 1Sec.x10 [1] x10 [1] 8/20μSec [1] 10/350μSec [1] μSecx300 [1]<br>SL1021A090<br>SL1024A090<br>��� [��] �� 4kA [2]<br>SL1021B090 72 90 108 650<br>SL1024B090 �������� 5kA [3]<br>PMT 8 090<br>SL1021A145<br>SL1024A145<br>SL1021B145 116 145 174 500<br>SL1024B145<br>SL1021A150 600<br>SL1024A150<br>120 150 180<br>SL1021B150<br>SL1024B150<br>SL1021A200 150 200 250<br>SL1021A230<br>SL1024A230<br>SL1021B230 184 230 276 450<br>SL1024B230<br>PMT 8 230<br>650<br>SL1021A250<br>SL1024A250<br>SL1021B250 200 250 300 500<br>SL1024B250<br>PMT 8 250<br>SL1021A260<br>SL1024A260<br>210 260 310 550 700<br>SL1021B260<br>SL1024B260 10kA [2] 15kA [2]<br><1.5pF 10Amps 200Amps<br>SL1021A300 20kA [3] 25kA [3]<br>SL1024A300<br>240 300 360 650 850 ��� [��] �� 2.5kA [2]<br>SL1021B300<br>SL1024B300 ��������� 5kA [3]<br>SL1021A350<br>SL1024A350<br>SL1021B350 280 350 420 700 900<br>SL1024B350<br>PMT 8 350<br>SL1021A400<br>SL1024A400<br>SL1021B400 320 400 480<br>SL1024B400<br>PMT 8 400 850 950<br>SL1021A420<br>SL1024A420<br>345 420 500<br>SL1021B420<br>SL1024B420<br>SL1021A450<br>SL1024A450<br>360 450 540 900 1000<br>SL1021B450<br>SL1024B450<br>SL1021A500<br>SL1024A500<br>400 500 600 950 1100<br>SL1021B500<br>SL1024B500<br>SL1021A600<br>480 600 720 1000 1200<br>SL1024A600<br>**----- End of picture text -----**<br>


NOTES: 

- *Max capacitance is 1.5 pF, measured at 1 MHz. 

1. Total current through centre electrode, tested in accordance with ITU-T Rec K.12 

2. SL A series 

3. SL B series & PMT 8 series 

©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com for current information. Customer should verify actual device performance in their specific applications. 

**20** 

**SL1021A/B, SL1024A/B and PMT8 Series** 

Revised: November 10, 2009 

**Gas Discharge Tube (GDT) Products** SL1021A/B, SL1024A/B and PMT8 Series 

## ~~**Time vs. Current for Failsafe**~~ 

## ~~**Voltage vs. Time Characteristic**~~ 

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60 Max dynamic breakover<br>SL102xA with Failsafe voltage<br>30 SL102xB or PMT8 500 Volt Higher Melting Point Solder<br>SL102xB or PMT8 350 Volt Higher Melting Point Solder<br>20 SL102xB or PMT8 90 Volt Higher Melting Point Solder<br>15<br>14<br>13<br>12<br>11<br>10<br>9<br>87 Hold-over voltage<br>6<br>54 On-State voltage<br>3<br>2<br>1<br>0  200  400  600  800  1000  1200<br>0.5 1 2 5 10 15 30<br>Time (ns)<br>(V)<br>Voltage<br>**----- End of picture text -----**<br>


## ~~**Soldering Parameters - Refow Soldering (Surface Mount Devices)**~~ 

|Refow Condition|Refow Condition|Pb – Free assembly|
|---|---|---|
|Pre Heat<br> <br> <br>|- Temperature Min (Ts(min))|150°C|
||- Temperature Max (Ts(max))|200°C|
||- Time (Min to Max) (ts)|60 – 180 secs|
|Average ramp up rate (Liquidus Temp<br>(TL) to peak||3°C/second max|
|TS(max)to TL- Ramp-up Rate||5°C/second max|
|Refow<br> <br>|- Temperature (TL) (Liquidus|)<br>217°C|
||- Temperature (tL)|60 – 150 seconds|
|Peak Temperature (TP)||260+0/-5°C|
|Time within 5°C of actual peak<br>Temperature (tp)||10 – 30 seconds|
|Ramp-down Rate||6°C/second max|
|Time 25°C to peak Temperature (TP)||8 minutes Max.|
|Do not exceed||260°C|



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t P<br>T P<br>Critical Zone<br>Ramp-up TL to TP<br>T S(max) T L t L<br>Ramp-down<br>Preheat<br>T S(min)<br>t S<br>25<br>time to peak temperature Time<br>(t 25ºC to peak)<br>Temperature<br>**----- End of picture text -----**<br>


## ~~**Soldering Parameters - Hand Soldering**~~ 

Solder Iron Temperature:  350° C +/-  5°C Heating Time:  5 seconds max. 

## ~~**Soldering Parameters - Wave Soldering (Thru-Hole Devices)**~~ 

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300<br>280<br>260<br>240<br>220<br>200<br>180<br>160<br>140<br>120<br>100<br>80<br>60<br>40<br>20<br>0<br>Time (Seconds)<br>Preheat Time Cooling Time<br>Dwell Time<br>Temperature (°C) - Measured on bottom side of board 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240<br>**----- End of picture text -----**<br>


## **Recommended Process Parameters:** 

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Wave Parameter Lead-Free Recommendation<br>Preheat:<br>(Depends on Flux Activation Temperature) (Typical Industry Recommendation)<br>    Temperature Minimum: 100° C<br>    Temperature Maximum: 150° C<br>    Preheat Time: 60-180 seconds<br>Solder Pot Temperature: 280° C Maximum<br>Solder Dwell Time: 2-5 seconds<br>**----- End of picture text -----**<br>


Note: Surge Arrestors with a Failsafe mechanism should be individually examined after soldering 

©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com for current information. Customer should verify actual device performance in their specific applications. 

**21** 

**SL1021A/B, SL1024A/B and PMT8 Series** 

Revised: November 10, 2009 

**Gas Discharge Tube (GDT) Products** SL1021A/B, SL1024A/B and PMT8 Series 

## ~~**Device Dimensions**~~ 

NOTE: Failsafe option dimensions shown in green. 

## Shaped Radial Leaded Devices: 

## Surface Mount Devices: 

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Type 04 / R  [0.488 ± 0.039]12.4 ± 1[0.464]10.1011.8 Mounting Area[0.354]8.1.9.0 Type 01 / C  [0.464][0.398]10.1011.8 Mounting Area[0.354][0.319]9.08.1<br>[0.398] [0.319] 0.3mm<br>Minimum<br>0.3mm Gap<br>Minimum<br>Gap 9.9<br>9.9 [0.354]<br>[0.354]<br>15<br>[0.590]<br>16.8 1.0 DIA. MAX.<br>4.4 [0.661] [0.039] 10.0 ± 0.3<br>[0.173] [0.394 ± 0.019]<br>Type 60  [0.303 ± 0.019]7.7 ± 0.3 [0.275 ± 0.004]Ø7.0 ± 0.1<br>4.4± 0.3 4.4± 0.3<br>[0.173± 0.12] [0.173± 0.12]<br>[0.488 ± 0.039]12.4 ± 1 Mounting Area +0.019/-0.00]8.3 +0.3/-0.0[0.327 +0.019/-0.004]8.0 +0.3/-0.1[0.315<br>Type 05 / P [0.464]11.8 [0.354]9.0<br>10.10 8.1.<br>[0.398] [0.319] PROFILE VIEW SIDE VIEW TOP VIEW<br>0.3mm 2.2 ± 0.0<br>Minimum [0.087 ± 0.000]<br>Gap 9.9 [0.047 ± 0.000]1.2 ± 0.0 1.2 ± 0.0[0.047 ± 0.000]<br>[0.354]<br>15 6.0 ± 0.0 8.5 ± 0.0<br>[0.590] [0.236 ± 0.000] [0.335 ± 0.000]<br>16.8 1.0 DIA. MAX.<br>4.4 [0.661] [0.039]<br>[0.173] [0.423 ± 0.000]10.75  ± 0.0 Overall Product SpaceDO NOT ENCROACH<br>5.5± 0.3 5.5± 0.3 SOLDERING PAD LAYOUT<br>[0.216± 0.12] [0.216± 0.12]<br>**----- End of picture text -----**<br>


Straight "T" Leaded Devices: 

Straight Radial Leaded Devices: 

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14.7<br>[0.579]<br>Type 14 / X [1.968 ± 0.118 ][0.464]50 ± 311.8 Mounting Area[0.354]9.0 Type 06 / Y  [0.398][0.464]10.1011.8 8.1 DIA. MAX.Mounting Area[0.354][0.319]9.0<br>10.10<br>[0.398] 8.1 DIA. MAX. 0.3mm<br>[0.319] Minimum<br>Gap<br>Minimum0.3mm 9.9[0.354]<br>Gap<br>15<br>[0.590]<br>23.8[0.937] 16.8[0.661] 1.0 DIA. MAX.[0.039]<br>22<br>[0.866] 1.0 DIA. MAX.<br>[0.039]<br>6.35 ± 0.5 6.35 ± 0.5<br>[0.25 ± 0.25] [0.25 ± 0.25]<br>**----- End of picture text -----**<br>


©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com for current information. Customer should verify actual device performance in their specific applications. 

**22** 

**SL1021A/B, SL1024A/B and PMT8 Series** 

Revised: November 10, 2009 

**Gas Discharge Tube (GDT) Products** SL1021A/B, SL1024A/B and PMT8 Series 

## ~~**Part Numbering System and Ordering Information**~~ 

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SL102x  x  xxx  x  x   PMT8  xxx  x  x<br>Series Series<br>SL1021 PMT8<br>SL1024<br>Surge Capability<br>A = 10kA<br>B = 20kA<br>Breakdown Voltage Breakdown Voltage<br>090 = 90V 300 = 300V 090 = 90V<br>145 = 145V 350 = 350V 230 = 230V<br>150 = 150V 400 = 400V 250 = 250V<br>200 = 200V 420 = 420V 350 = 350V<br>230 = 230V 450 = 450V 400 = 400V<br>250 = 250V 500 = 500V<br>260 = 260V 600 = 600V<br>Configuration Code Configuration Code<br>(See Device Dimensions section) (See Device Dimensions section)<br>C  Y 01 10<br>R S 04 14<br>P X 05 60<br>06<br>Option Code Option Code<br>Blank = No failsafe Blank = No Failsafe<br>F or G = With Failsafe F = With Failsafe<br>**----- End of picture text -----**<br>


## ~~**Packaging**~~ 

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Device Type Description Quantity<br>**----- End of picture text -----**<br>


||||
|---|---|---|
|Type 01 / C|100pcs/tray x 5 trays per carton|500|
|Type 04 / R|100pcs/tray x 5 trays per carton|500|
|Type 05 / P|100pcs/tray x 5 trays per carton|500|
|Type 06 / Y|100pcs/tray x 5 trays per carton|500|
|Type 14 / X|50pcs/tray x 5 trays per carton|250|
|Type 60|500pcs/reel* x 10 reels per carton|5000|



* For tape and reel specifications, please contact factory. 

©2009 Littelfuse, Inc. Specifications are subject to change without notice. Please refer to www.littelfuse.com for current information. Customer should verify actual device performance in their specific applications. 

**23** 

**SL1021A/B, SL1024A/B and PMT8 Series** 

Revised: November 10, 2009