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) |