DATASHEET
Common-mode Chokes RC series
Current-compensated Chokes
2021
02 Feb 2021
EMC/EMI Products
RC series: Current-compensated Chokes
  • Rated currents from 0.25 to 0.7 A
  • DC to 400 Hz frequency
  • 100 kHz to 3 MHz common-mode resonance frequency
  • Dual-choke configurations
  • Multiple PCB-mounting options

Performance indicators

Technical specifications

Rated operating voltage

250 VAC

Operating frequency

DC to 400 Hz

Rated currents

0.25 to 0.7 A @ rated ambient temperature

Rated inductance

4.7 to 47 mH

Stray inductance

Typically 1% of LN

Inductance reduction (DC bias with IN)

Less than 10% (25°C)

High potential test voltage winding-to-winding @ 25°C

1500 VAC, 60 sec, guaranteed
1500 VAC, 2 sec, factory test

winding-to-housing @ 25°C

4000 VAC, 60 sec, guaranteed

Surge current @ 10 msec

20 x IN @ 25°C

Temperature range (operation and storage)

-40°C to 125°C (40/125/56)
acc. IEC 60068-1

Flammability corresponding to

UL 94V-0

Design corresponding to

IEC/EN 60938-2

Frequency (DC)

400 Hz

MTBF @ Rated amb. Temp./Voltage (Mil-HB-217F)

> 5,000,000 hours

Approvals & Compliances

RC chokes are attenuating common-mode or asymmetric (P/N –> E) interference signals, by being connected in series with the phase and neutral lines of an AC powerline input. Symmetrical components of the noise are also attenuated by the leakage inductance (stray inductance) of the windings. These chokes are typically used in conjunction with suppression capacitors.

Features and benefits

  • High saturation resistance and excellent thermal behavior
  • Through hole pin connections
  • Dual-choke configuration
  • Small compact design
  • Multiple housing options
  • Custom-specific versions are available on request
  • Environmental friendly open design

Typical applications

  • Switch-mode power applications
  • DC/DC converters
  • HVAC, typically in EMI input filter for ventilation
  • LED driver circuit
  • For suppression-equipment with no earth connection, e.g. medical
  • Phase-angle control circuits in combination with saturating chokes
  • Consumer electronics, EDP, test equipment, electronic ballasts in lamps etc.
  • Applicable for low frequency signaling effective from 10kHz to 30MHz

Typical electrical schematic

Choke selection table

Choke Buy Current @ Ambient Inductance Stray Inductance Resistance Pin 1-2** Pin 1-3 Height Weight
    (lN) Temperature* (LN) (LS) (RDC) (Pin 3-4)      
    [A] [°C] [mH] [mH] [mOhm] [mm] [mm] [mm] (g)
RC112-0.25-47M 0.25 40 47.0 0.6 2400 10 15 8 3
RC112-0.3-30M 0.3 40 30.0 0.5 2200 10 15 8 3
RC112-0.35-22M 0.35 40 22.0 0.4 1900 10 15 8 3
RC112-0.4-15M 0.4 40 15.0 0.25 1350 10 15 8 3
RC112-0.5-10M 0.5 40

10.0

0.17 1000 10 15 8 3
RC112-0.6-6M8 0.6 40 6.8 0.12 630 10 15 8 3
RC112-0.7-4M7 0.7 40 4.7 0.075 440 10 15 8 3
                     
RC212-0.25-47M 0.25 40 47.0 0.6 2400 5.08 (2.54) 12.7 17.6 3
RC212-0.3-30M 0.3 40 30.0 0.5 2200 5.08 (2.54) 12.7 17.6 3
RC212-0.35-22M 0.35 40 22.0 0.4 1900 5.08 (2.54) 12.7 17.6 3
RC212-0.4-15M 0.4 40 15.0 0.25 1350 5.08 (2.54) 12.7 17.6 3
RC212-0.5-10M 0.5 40 10.0 0.17 1000 5.08 (2.54) 12.7 17.6 3
RC212-0.6-6M8 0.6 40 6.8 0.12 630 5.08 (2.54) 12.7 17.6 3
RC212-0.7-4M7 0.7 40 4.7 0.075 440 5.08 (2.54) 12.7 17.6 3

 Test conditions: Measuring frequency: 10 kHz; 50 mV; Inductance tolerance: +50%, -30%; Resistance tolerance: ±15% @ 25°C; Electrical characteristics @ 25°C: ±2°C
* Rated ambient temperature according to approval. For other ambient temperatures, please make use of the derating graph below
** Values in brackets show the pin-out distance between pin 3 and 4.  Symmetrical pin-out on request

Product selector

 

 

Thermal Derating


If higher ambient temperatures than the specified apply, the nominal current needs to be reduced according to the graph below.

Typical attenuation/resonance frequency characteristics

Per CISPR 17; 50 Ω/50 Ω

RC112, RC212 common mode

RC112, RC212 differential mode

Mechanical data

RC112

RC212

For dimensions [mm] without tolerances: ISO 2768-m/ EN 22768-m applies

Pin material: Steel (base), Cu (under plating), Sn (final plating 6µm)

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