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Current Sensitive Thermal Protection For Coils / Windings

Thermal Cut-outs/Bimetal Thermostats

These thermal cutouts operate by means of a thermally sensitive bimetal snap-element which switches a double electrical contact when reaching a pre-set response temperature. They can be normally open or normally closed. The electrical current being switched flows through the bimetal element, which therefore gives a combination of temperature and current – sensitivity.

T 10, T 11, T 12, T 21, T22

Applications

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

Technical Data

ratings T10A / E

T11A/ E

T12A / E T22A T10B / G T22B 1)
version normally closed Cantherm

Code=2

normally open Cantherm

Code=1

rated current at 250 V 50/60 Hz (cos 0.95/0.6) 2.5 A / 1.6 A 6.3 A / 2.5 A 20.0 A / 3.0 A 2.0 A / 1.6 A 3.5 A / 2.0 A
switching cycles under rated current  10,000
max. current under failure condition at 250 V 50/60 Hz (power factor 0.95) 10.0 A 12.0 A 30.0 A 10.0 A 20.0 A-
switching cycles under max. current 300 600 300 1,000
temperature rating Ta (steps in 5 K) (50) 70°C…180°C 2) (50) 70°C…180°C 2)
tolerances standard:+/- 5 K
feature of automatic action 1.C.M, 2.C 2.B, 1.C, 3.C 1.B, 2.C
contact resistance ( incl. wire of 100 mm ) < 50 mΩ
hysteresis 30 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 impregnation tight against ordinary resins and lacquers
degrees of protection provided by enclosures ( EN 60529 ) IP00
suitable for use in protection category I, II
approvals VDE / ENEC EN 60730-1 / -2-3 6) /-2-9
UL UL 2111 / UL 873 1)
CSA / cUL C22.2 No. 77 / C22.2 No. 24 1)
CQC GB14536.1-1998 / GB14536.10-1996 1)
1) details on request
2) T10 max. Ta 160°C
3) approval to EN60730-2-2 up to 180°C
4) T10 available with ± 3K tolerances and smaller hysteresist
5) at the Ta (upper and lower) limits the hysteresis could deviate
6) different power rating

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

lead Cantherm
code
temp. max. operating
voltage max.
diameter insulation cross section diameter2) UL style
black ACDA 150° C 300 V 1.45 mm AWG24 3266/
3398
yellow AEDC 1.80 mm AWG20
black AFDA1) 2.15 mm AWG18
white LFDB 200° C 600 V 1.50 mm AWG18 3557
black ASDA 3)  150° C 300 V 1.65 mm AWG20 3266/3398
white DCDB  200° C  300 V 1.30 mm AWG24  1180
white DEDB 1.70 mm AWG20
white DFDB 2.00 mm AWG18
1)T22 only
2)for T12/T11 AWG20 and for T10 AWG24 is recommended
3)Solid Wire
NOTE: Additional wires available upon request.

Standard insulation

control type nc no Cantherm code illust. drawing dimensions (mm) technicals specification approvals1)
T10 A B U102 | B

MIC Version Shown

shrink cap
potted
VDE,UL, cUL
T11,T12 A U106 | F
T22 A B U107 | G
T10 A B U183 | 1 cap of PA 4.6
potted
VDE, UL, cUL
T11,T12 A

Specific variations

control type nc no Cantherm code illust. drawing dimensions (mm) technicals specification approvals
T10 A B Insulation 0

type T11, T12 illustrated

no insulated
potted
VDE,UL,cUL, CSA
T11,T12 A
T10 A B Insulation
U112 | L
coated Ta max. 160°C VDE,UL, cUL
T11,T12 A
T11,T12 A Wire Type A334 | 6 no insulation PCB connector grid dim. 5.08 VDE,UL,cUL
T11,T12 A Insulation U314 | 4 cap of PPS PCB connector grid dim. 5.08 VDE,UL,cUL
T11,T12 A Insulation U315 | 5 cap of PPS PCB connector grid dimension 5.08 VDE,UL,cUL
T10 A B Insulation U293 | K housing of PPS potted VDE,UL, cUL
T11,T12 A
T10 E G Housing G718 | 3 potted aluminum housing anodized black M4x6 Ta max. 150°C VDE,UL, cUL
T11,T12 E
T22 A B Insulation 0 No insulation potted VDE,UL,cUL, CSA
T22 A B Insulation U112 | L coated Ta Max / 60°C VDE,UL,cUL

Heating by current

The characteristic curves are 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

Ordering Example [ T11A12005AEDCB0E ]
T11 A 120 5 AE D C B 0 E
type normally closed temperature tolerance +/-5°C lead wire UL3398 20 AWG lead length D=4″ color yellow insulation U102 housing – none strip length .25″
Marking
T11A type (T11 nc)

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

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