B12 / B13 (Double Contacts)

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Protection For Coils / Windings

Thermal Cut-outs/Bimetal Thermostats

This thermostat operates as a thermal cutout. A thermally sensitive bimetal snap-element with double contacts either opens or closes an electrical circuit by switching at a pre-set response temperature. Reset follows automatically after a considerable drop in temperature.

B12 / B13 (Double Contacts)

Applications

Single Phase Motors, Generators, Convertors, Transformers, Pumps, Heating Elements, Signal Transmitters, Fire Detectors, Magnets, Relays, Chokes, Coils, Power Supplies, Inverters

Technical Data

ratingsB12A / EB12B / GB13N / T
versionnormally closed Cantherm Code=2nnormally open Cantherm Code=1normally closed / open
rated current at 250 V 50/60 Hz (cos 0.95/0.6)6.3 A / 6.0 A10.0 A / 6.0 A13.0 A / 6.0 A5.0 A / 1.6 A1…100 mA (24 Vdc)
switching cycles under rated current 10,000 5,000 1,000 5,000 10,000
max. current under failure condition at 250 V 50/60 Hz (power factor 0.95)30.0 A
switching cycles under max. current100
temperature rating Ta (steps in 5 K)70°C…160°C70°C…155°C70°C…160/155°C
tolerancesstandard:+/- 5 K
feature of automatic action1.B.M, 2.B, 1.C1.B
contact resistance ( incl. wire of 100 mm )< 50 mΩ
hysteresis30 K ± 15 K1
dielectric strength ( standard insulation )2 kV
shock- / vibration testing( similar to EN 50155 )400 m/s2sine half wave / 100 m/s2 5 Hz … 2,000 Hz sine
resistances to impregnationtight against ordinary resins and lacquers
degrees of protection provided by enclosures ( EN 60529 )IP00
suitable for use in protection categoryI, II
approvalsVDE / ENECEN 60730-1 / -2-3 2) /-2-9
ULUL 2111 / UL 873 3)
CSA / cULC22.2 No. 77 / C22.2 No. 24 3)
CQCGB14536.1-1998 / GB14536.10-1996 3)
1) at the Ta (upper and lower) limits the hysteresis could deviate
2) different power rating
3) details on request

Standard wire ( length 100 ± 10 mm, stripped 6 ± 1 mm )

leadCantherm
code
temp. max.operating
voltage max.
diameter insulationcross section diameter2)UL style
blackACDA150° C300 V1.57 mmAWG24 / 0.24 mm2)3266
or
3398
yellowAEDC1.80 mmAWG20 / 0.48 mm2)
blackAFDA2.15 mmAWG18 / 0.96 mm2)
whiteLCDB200° C600 V0.90 mmAWG24 / 0.24 mm2)3557
whiteLEDB1.26 mmAWG20 / 0.61 mm2)
whiteLFDB1.50 mmAWG18 / 0.96 mm2)
blackASDA 3)150° C300 V1.65 mmAWG20 / 0.81 mm3266
or
3398
whiteDEDB200° C300 V1.51 mmAWG20 / 0.81 mm1180
2)AWG20 is recommended
3)Solid Wire
NOTE: Additional wires available upon request.

Standard insulation

control typencnoCantherm codeillust.drawing dimensions (mm)technicals specificationapprovals1)
B12ABClass B U103 | C

Class F U107 | G

MIC Version Shown

shrink cap
potted
VDE,UL, cUL
B13NT
B12ABU155 | X

U186 | 3

cap of PPS
potted
VDE, UL, cUL
B13NT

Specific variations U= insulation G= Housing

control typencnoCantherm codeillust.drawing dimensions (mm)technicals specificationapprovals1)
B12ABnone | 0not insulated
potted
VDE,UL,cUL, CSA
B13NT
B12ABU112 | Lepoxy coatedVDE,UL, cUL
B13NT
B12ABU294 | Ghousing of PPS

potted

VDE,UL, cUL
B13NT
B12ABWire A800 | IZAnot insulated

potted

VDE,UL, cUL
B13NT
B12EGG702 | Caluminum housing

thread M4x6

potted

Ta max. 150†C

VDE,UL, cUL
B13NT
B12E GG714 | Fbrass housing

thread M4x5

potted

Ta max. 150†C

VDE,UL, cUL
B13NT

Heating by current

The diagram is measured with a thermal control without any insulation in an oil bath.
Attention:
The heating depends on the thermal conduction of the control to the equipment or part which should be protected.

Ordering & Marking Example

Cantherm Ordering Example [ B12A12005AEDCC0E ] standard version
B12A12005AEFDCCOE
typenormally closedtemperaturetolerance +/-5°Cwire leads UL3398 20 AWGlength D=4″color yellowinsulation U103housing – nonestrip .25″
Marking
B12A type (B12 nc)

12005 response temperature (120°C), tolerance (± 5K)

112C date of manufacture (Nov. 2012), country (C = Canada)