RT8121-32-12M8

## **Current-Compensated Chokes - Nanocrystalline Core** 

Rated currents from 25 to 63 A Approvals & Compliances ee 

Up to 600 VAC and VDC 

2- and 3-wire configurations Horizontal and vertical PCB mounting types Ruggedized saturation and thermal behavior Open construction for forced and convection cooling 

RT common-mode chokes are mainly used to filter EMI noise on AC power lines up to 600 VAC. EMI noise of electronic equipment can go to the power lines and disturb the proper function of other devices like communication devices or control logic of robotics. Thus noise generated by the equipment from switched power electronics or by high slew rates of controllers needs to be filtered. RT common-mode chokes are used to suppress EMI noise in PCB integrated filter designs with line bypass capacitors or in combination with single phase filters for extra low leakage filter designs. 

Straightforward pin-out for easy PCB design Nanocrystalline core for high performance at 10 kHz 

## **Features and Benefits** 

**==> picture [363 x 123] intentionally omitted <==**

**----- Start of picture text -----**<br>
Performance indicators<br>Inductance value [mH]<br>\\ li<br>3 - 13<br>a<br>Rated current [A]<br>25 63<br>**----- End of picture text -----**<br>


Cost-effective PCB designs for up to 100 A with forced cooling 

EIS (electrical insulation system E332676) acc. to UL 1446 

Compact size and light weight Low magnetic leakage flux Excellent winding insulation Standardized foot print Broad range of inductance ratings Custom-specific versions on request 

## **Typical Applications** 

## **Technical Specifications** 

25 to 63 A @ 60°C DC to 400 Hz 

**Rated currents Operating frequency Creepage and clearance distances** 

**Creepage and clearance distances** Creepage & Clearance (2-line): ≥ 3.5 mm (Coil - Coil) / ≥ 3.0 mm (Coil-Core) Creepage & Clearance (3-line): ≥ 6.3 mm (Coil - Coil) / ≥ 5.5 mm (Coil-Core) **High potential test voltage** 3 kV AC 3s (coil to coil) Repetition with max. 80% of the HV test voltage **Rated inductance** 3 to 13 mH **Operating voltage** 300 VAC / 450 VDC (2-line) 600 VAC (3-line) **Overvoltage category** III (acc. IEC 60664-1) **Pollution degree** PD2 (acc. IEC60664-1) **Stray inductance** Max. 0.1% of rated inductance (@ 10 kHz 1 V, 0 A) **Temperature range (operation and storage)** -40°C to +125°C **Climatic category** 40/125/56 (acc. IEC 60068-1) **Altitude** 2'000 m, current and voltage derating above **Flammability corresponding to** UL 94 V0 **Vibration and shock** Vibration: 10 Hz to 55 Hz (24 cycles, according IEC 60938-1) Shock: 30 g / 18 ms (3 cycles, according IEC 60938-1) 3M4 (according IEC 60721-3-3) **Design corresponding to** UL/IEC 60938-1/-2 UL1446 **MTBF (Mil-HB-217F)** >2,000,000 h @ 60°C/300 V 

AC and DC filtering for midsize power range drives, photovoltaic inverters, fast chargers, EV charging stations, UPS and switch mode power supplies 

Filter with low leakage current noise or improved immunity against grid disturbances Electronic devices, automation and (industrial) LED lighting Communication devices Medical and laboratory equipment Converters 

## Typical electrical schematic ~~ee~~ 

**==> picture [185 x 255] intentionally omitted <==**

**----- Start of picture text -----**<br>
RT8121 & RT8521<br>2x Lcm<br>1 O———™———_O 2<br>-<br>3 4<br>RT8131 & RT8531<br>3x Lcm<br>1 O———lt——_O 2<br>3 2. 4<br>5 2. 6<br>**----- End of picture text -----**<br>


**Schaffner Group DATA** SHEET 02. Jul 2024 

2 EMC / RFI Chokes 

## **RT Series - Nanocrystalline Core** 

||Cooling nominal|*3 m/s nominal|**Ln @ 25˚C|Ln @ 25˚C|R @ 25˚C|Size|***Ø Pin|Weight|
|---|---|---|---|---|---|---|---|---|
||Current @ 60˚C|Current @ 60˚C|10kHz|100kHz|||±0.1||
||[A]|[A]|[mH/path]|[mH/path]|[mΩ/path]|[size]|ØP [mm]|[g]|
||||||||||
|**Horizontal 2-line**|||||||||
|**RT8121-32-12M8**|32|51|12.8|2.9|3.4|13|2.4|220|
|**RT8121-40-10M1**|40|64|10.1|2.3|2.2|13|2.8|230|
|**RT8121-50-8M6**|50|80|8.6|1.9|1.7|14|2x 2.2|280|
|**RT8121-63-4M4**|63|100|4.4|1|1.1|14|2x 2.2|270|
||||||||||
|**Vertical 2-line**|||||||||
|**RT8521-32-12M8**|32|51|12.8|2.9|3.5|15|2.4|230|
|**RT8521-40-10M1**|40|64|10.1|2.3|2.3|15|2.8|240|
|**RT8521-50-8M6**|50|80|8.6|1.9|1.7|16|2x 2.2|300|
|**RT8521-63-4M4**|63|100|4.4|1|1|16|2x 2.2|290|
||||||||||
|**Horizontal 3-line**|||||||||
|**RT8131-25-12M8**|25|25|12.8|2.9|3.5|17|2.4|260|
|**RT8131-32-10M1**|32|51|10.1|2.3|2.5|17|2.4|260|
|**RT8131-40-6M3**|40|64|6.3|1.4|1.9|18|2x 1.9|290|
|**RT8131-50-4M4**|50|80|4.4|1|1.2|18|2x 2.2|300|
|**RT8131-63-2M8**|63|100|2.8|0.6|0.7|18|2x 2.6|320|
||||||||||
|**Vertical 3-line**|||||||||
|**RT8531-25-12M8**|25|25|12.8|2.9|3.5|19|2.4|260|
|**RT8531-32-10M1**|32|51|10.1|2.3|2.5|19|2.4|260|
|**RT8531-40-6M3**|40|64|6.3|1.4|1.9|20|2x 1.9|290|
|**RT8531-50-4M4**|50|80|4.4|1|1.2|20|2x 2.2|300|
|**RT8531-63-2M8**|63|100|2.8|0.6|0.8|20|2x 2.6|320|



Test conditions: Inductance tolerance: +50%, –30%; Resistance tolerance: +15% @ 25°C; Electrical characteristics @ 25°C: ±2°C 

* Typical current for forced cooling with 3 m/s. Due to the possible turbulences and degradation of the air stream within an equipment please consider thermal validation. 

** Typical stray inductance, max is 0.1% of Ln. 

*** Length of pin (dimension P) is always 5.5 mm ± 1 mm. 

**Schaffner Group DATA** SHEET 02. Jul 2024 

3 EMC / RFI Chokes 

## Product selector 

RT8xxx-xx-xMx 

Inductance value (e.g. 1M2 = 1.2mH) Nominal input current [A] 1: nanocrystalline core 2: ferrite core 2: 2–line choke 3: 3–line choke 1: Horizontal 5: Vertical 

RT: Schaffner standard ring core choke series “RT” 

Examples: RT8121-32-12M8: Horizontal 2-line choke for 32 A, with 12.8 mH RT8531-50-4M4: Vertical 3-line choke for 50 A, with 4.4 mH 

## **Distribution Inventory** 

Up-to-date inventory levels for global distributors is available at 

https://products.schaffner.com/stock 

**Schaffner Group DATA** SHEET 02. Jul 2024 

4 EMC / RFI Chokes 

## **Typical Choke Attenuation And Impedance - 2-Line Versions** 

Per CISPR 17; 50 Ω/50 Ω asym 

RT8x21-32-12M8 

RT8x21-40-10M1 

RT8x21-50-8M6 

**==> picture [654 x 160] intentionally omitted <==**

RT8x21-63-4M4 

**==> picture [207 x 156] intentionally omitted <==**

## **Typical Choke Attenuation And Impedance - 3-Line Versions** 

Per CISPR 17; 50 Ω/50 Ω asym 

RT8x31-25-12M8 RT8x31-32-10M1 

RT8x31-40-6M3 

**==> picture [654 x 161] intentionally omitted <==**

RT8x31-50-4M4 

RT8x31-63-2M8 

RT 8132 

**==> picture [427 x 155] intentionally omitted <==**

**Schaffner Group DATA** SHEET 02. Jul 2024 

5 EMC / RFI Chokes 

## **Mechanical Data: Horizontal Chokes** 

All dimensions in mm; 1 inch = 25.4 mm Tolerances according: ISO 2768-m/EN 22768-m 

**==> picture [470 x 8] intentionally omitted <==**

**----- Start of picture text -----**<br>
Horizontal 2-line chokes (Size 13 & 14) Horizontal 3-line chokes (Size 17 & 18)<br>**----- End of picture text -----**<br>


## **Dimensions** 

||||**øD**|**Н**|**G**|**øЕ**|**f**|**g**|**L**|**øР**|**øР**|**øР**|**øР**|**øР**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|||||||||||(25A)|(32A)|(40A)|(50A)|(63A)|
||||±0.2|(max)|±0.1|±0.2|±1°|±1°|±0.5|±0.1|±0.1|±0.1|±0.1|±0.1|
|**Size 13 (RT8121-32-12M8, RT8121-40-10M1)**|**Size 13 (RT8121-32-12M8, RT8121-40-10M1)**|**Size 13 (RT8121-32-12M8, RT8121-40-10M1)**|62|37|0.6|55.4|150°||5||2.4|2.8|||
|**Size 14 (RT8121-50-8M6, RT8121-63-4M4)**|**Size 14 (RT8121-50-8M6, RT8121-63-4M4)**|**Size 14 (RT8121-50-8M6, RT8121-63-4M4)**|66|41|0.6|59.8|120°|220°|5||||2x 2.2|2x 2.2|
|**Size 17 (RT8131-25-12M8, RT8131-32-10M1)**|**Size 17 (RT8131-25-12M8, RT8131-32-10M1)**|**Size 17 (RT8131-25-12M8, RT8131-32-10M1)**|62|38|0.6|55.4|150°||5|2.4|2.4||||
|**Size 18 (RT8131-40-6M3, RT8131-50-4M4, RT8131-63-2M8)**|**Size 18 (RT8131-40-6M3, RT8131-50-4M4, RT8131-63-2M8)**|**Size 18 (RT8131-40-6M3, RT8131-50-4M4, RT8131-63-2M8)**|66|42|0.6|59.8|120°|220°|5|||2x 1.9|2x 2.2|2x 2.6|



**Schaffner Group DATA** SHEET 02. Jul 2024 

6 EMC / RFI Chokes 

## **Mechanical Data: Vertical Chokes** 

All dimensions in mm; 1 inch = 25.4 mm Tolerances according: ISO 2768-m/EN 22768-m 

**==> picture [135 x 8] intentionally omitted <==**

**----- Start of picture text -----**<br>
Vertical 2-line chokes (Size 15 & 16)<br>**----- End of picture text -----**<br>


**==> picture [282 x 340] intentionally omitted <==**

**----- Start of picture text -----**<br>
Vertical 3-line chokes (Size 19 & 20)<br>L<br>P<br>O<br>M S<br>T<br>N<br>5 3 1<br>nN WL I . :<br>On _\ il l<br>a _oh__ 4<br>6 4 2<br>as \\ —aa mark indic       ates PIN no. 1<br>Q \<br>\ recommendad screw for fixation:<br>MA             X COMPONENT L_ W             N 1452 K             35 x 8<br>V             OLUME tightening torqu  e    1   .0 Nm<br>a 1= Z q a| | | C a N is |<br>a PILES UT Lee Fp<br>P              (25A / 32A             )<br>LI P                  (40A / 50A / 63A) L | L ] i<br>B            C            D<br>G<br>R<br>x<br>a<br>m<br>H<br>**----- End of picture text -----**<br>


## **Dimensions** 

||**L**|**В**|**H**|**G**|**C**|**D**|**M**|**N**|**O**|**P**|**Q**|**S**|**T**|**R**|**øР**|**øР**|**øР**|**øР**|**øР**|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
||||||||||||||||(25A)|(32A)|(40A)|(50A)|(63A)|
||±0.2|±0.2|(max)|±0.1|±0.4|±0.2|±0.1|±0.4|±0.4|±0.4|±0,4|±0.4|±0.2|±0.5|±0.1|±0.1|±0.1|±0.1|±0.1|
|**Size 15 (RT8521-32-12M8, RT8521-40-10M1)**|60|38|60|0.6|32|12|4|||52|46|||5||2.4|2.8|||
|**Size 16 (RT8521-50-8M6, RT8521-63-4M4)**|64|42|64|0.6|36|18|4|5|51|56|56|||5||||2x<br>2.2|2x<br>2.2|
|**Size 19 (RT8531-25-12M8, RT8531-32-10M1)**|60|38|63|0.6|32|12|4|||52|46||26|5|2.4|2.4||||
|**Size 20 (RT8531-40-6M3, RT8531-50-4M4,**<br>**RT8531-63-2M8)**|64|42|67|0.6|36|18|4|5|51|56|56|30.5|25.5|5|||2x<br>1.9|2x<br>2.2|2x<br>2.6|



> 7 | EMC / RFI Chokes | **Schaffner Group DATA** SHEET 02. Jul 2024 **Soldering Profile** 

**Schaffner Group DATA** SHEET 02. Jul 2024 

8 EMC / RFI Chokes 

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