Thermomagnetic device circuit breaker, 2-pos., tripping characteri - PHOENIX CONTACT - CB TM2 12A SFB P - 2800877 View larger
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Thermomagnetic device circuit breaker, 2-pos., tripping characteri - PHOENIX CONTACT - CB TM2 12A SFB P - 2800877





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Thermomagnetic device circuit breaker, 2-pos., tripping characteristic SFB, 2 PDT contacts, plug for base element.

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Product description

Thermomagnetic device circuit breaker


Installation instructionsWhen mounted in rows, the nominal device current can be limited to just 80% or must be overdimensioned accordingly.
Flammability rating according to UL 94V0
Mounting typeOn base element
Number of positions2
Insulating material groupII
Pollution degree2

Electrical data

Fuse typeSFB
Rated surge voltage2.5 kV (Increased insulation in actuation area)
Rated voltage80 V DC (IEC 60934)
80 V DC (UL 1077)
80 V DC (UL 508 - with plug-in base)
Rated current IN12 A (IEC 60934)
inductive load according to UL 1077
12 A DC (low-induction load according to UL 1077)
12 A DC (low-induction load according to UL 508 - with plug-in base)
12 A DC
Rated insulation voltage Ui277 V AC (UL 1077)
250 V AC (IEC 60934)
Required backup fuse≥ 48 A
Contact type2 PDT
Power dissipation2.88 W (in nominal operation per channel)
Insulation resistance Riso> 100 MΩ (500 V DC)
Type of actuationS type
Tripping methodTM (thermomagnetic)
Tripping levelTrip-free mechanism (positive)
Rated short-circuit switching capacity Icn600 A (80 V DC)
Short-circuit switching capacity Ik1000 A AC 277 V AC
1000 A DC 50 V DC
Dielectric strength3000 V AC (Actuation area)
1500 V AC (Main to auxiliary circuit)
1500 V AC (Open main circuit)
1000 V AC (Open auxiliary circuit)
1500 V AC (Position to position)
Voltage drop0.13 V (at 1 x In)
Switching cycles, max.6000 (240 V AC/1 x In)
3000 (80 V DC/1 x In)
Contact type2 PDT
Auxiliary circuit277 V AC / 0.5 A (Low-induction)
277 V AC / 1 A (Low-induction, maximum of 2000 cycles)
50 V DC / 1 A (Low-induction)
Minimum auxiliary contact operating voltage10 V
Maximum auxiliary contact operating voltage240 V
240 V
Minimum auxiliary contact operating current10 mA
Maximum auxiliary contact operating current1 A
Vibration resistance, frequency57 Hz ... 500 Hz
Vibration resistance, amplitude0.61 mm (10 - 57 Hz)
Vibration resistance, acceleration80 m/s²
Vibration resistance, test duration10 (Frequency cycles/axis)


Height45 mm
Width24.6 mm
Depth52 mm

Ambient conditions

Ambient temperature (operation)-30 °C ... 60 °C
Ambient temperature (storage/transport)-40 °C ... 80 °C
Humidity test240 h, 95% RH, 40°C
Shock (operation)30g (IEC 60068-2-27, Test Ea)
Degree of protectionIP30 (Actuation area)

Standards and Regulations

Standards/specificationsEN 60934
UL 1077 UL/C-UL recognized
UL 508 UL/C - UL listed
CSA 22.2 No. 235-041

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