Protection For Coils / Windings
Thermal Cut-outs/Bimetal Thermostats
THE F11 IS NOW F20A or F20B
This thermostat operates as a thermal cutout. A thermally sensitive bimetal snap-element with single 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.
F13, F20, F23 (Single Contacts)
Applications
Single Phase Motors, Generators, Convertors, Transformers, Pumps, Heating Elements, Signal Transmitters, Fire Detectors, Magnets, Relays, Chokes, Coils, Power Supplies, Inverters
Benefits
Small dimensions
Shock and vibration tested
Leadframe version
Tested for audio, video applications (EN 60065)
Technical Data
| ratings | F20A / E | F13A | F23A / E | F20B / G | |
| version | normally closed | normally open | |||
| rated current at 250 V 50/60 Hz (power factor 0.95/0.6) | 2.0 A / 1.6 A | 3.0 A / 2.5 A | 3.0 A / 3.0 A | 2.0 A / 1.6 A | |
| switching cycles under rated current | 7,000 | 10,000 | 10,000 | 7,000 | |
| max. current under failure condition at 250 V 50/60 Hz (power factor 0.95) | 4.0 A | 5.0 A | 4.0 A | ||
| switching cycles under max. current | 3,000 | ||||
| temperature rating Ta (steps in 5 K) | 70†C…190†C | 70†C…155†C | |||
| tolerances | standard:+/- 5 K | ||||
| feature of automatic action | 1.B, 2.B.M, 1.C | 2.B, 1.C | |||
| contact resistance ( incl. wire of 100 mm ) | < 50 mΩ | ||||
| hysteresis | 30 K ± 15 K2 | ||||
| dielectric strength ( standard insulation ) | 2 kV | ||||
| shock- / vibration testing( similar to EN 50155 ) | 400 m/s2 sine 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/-2-9 | |||
| 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) at the Ta (upper and lower) limits the hysteresis could deviate |
|||||
Standard wire length 100 (MIC) | 150 (Cantherm) ± 10 mm, stripped 6 ± 1 mm
| lead | Cantherm code |
temp. max. | operating voltage max. |
diameter insulation | cross section diameter1 | UL style |
| black | ACFA | 150° C | 300 V | 1.57 mm | AWG24 / 0.24 mm2 | 3266 or 3398 |
| yellow | AEFC | 1.80 mm | AWG20 / 0.48 mm2 | |||
| white | LCFB | 200° C | 600 V | 1.2 mm | AWG24 / 0.25 mm2 | 10086 |
| white | LEFB | 1.6 mm | AWG20 / 0.50 mm2 | |||
| black | ASFA | 150° C | 300 V | 1.65 mm | AWG20 / 0.81 mm | 3266 or 3398 |
| white | DCFB | 200° C | 300 V | 1.21 mm | AWG24 / 0.51 mm | 1180 |
| white | DEFB | 1.51 mm | AWG20 / 0.81 mm | |||
| 1)AWG24 is recommended NOTE: Additional wires available upon request. | ||||||
Standard insulation
| control type | nc | no | Cantherm code | illust. | drawing dimensions (mm) | technicals specification | approvals |
| F13 F20, F23 |
A | U102 | B |  |
different dimensions |
shrink cap potted |
VDE,UL, cUL | |
| A | B | U106 | F | |||||
| F13 | A | U198 |  |
different dimensions |
cap of PPS potted |
VDE, UL, cUL | |
| F13, F23 | A | B | U185 |
Specific variations U= insulation G= Housing
| control type | nc | no | Cantherm code | illust. | drawing dimensions (mm) | technicals specification | approvals |
| F13 | A | Insulation None | 0 |
 |
 |
not insulated potted |
VDE,UL, cUL | |
| F23 | A | B | Insulation None | 0 |
 |
 |
not insulated potted |
VDE,UL, cUL, CSA |
| F13 | A | Insulation U112 | L |
 |
 |
epoxy coated | VDE,UL, cUL | |
| F20, F23 | A | B | |||||
| F20, F23 | E | G | Housing G410 | 6Leads A150 | 36 |
 |
 |
housing of PPS leadframe leads grid dimension 5.08 potted |
VDE,UL, cUL, CSA |
| F13 | A | Leads A800 | IZA |
 |
 |
not insulated potted |
VDE,UL, cUL | |
| F23 | A | B | |||||
| F20, F23 | E | G | G700 | B |  |
 |
aluminum housing thread M4x6 pottedTa max. 150†C |
VDE,UL, cUL, CSA |
| F20 | A | B | G410 | 6
Leads | ACFA |
 |
 |
housing of PPS potted |
VDE,UL, cUL |
| F13 | A | A150 | 36 |  |
 |
leadframe leads grid dimension 5.08 epoxy coated |
VDE,UL, cUL, CSA | |
| F20, F23 | A | B | U112 | L |
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
| MIC Ordering Example [ F20A12005L310100U54 ] | ||||||
| F20 | A | 120 | 05 | L310 | 100 | U254 |
| type | normally closed | temperature | tolerance +/-5°C | lead wire white, AWG20 | length 100 mm | shrink cap insulation |
| Cantherm Ordering Example [ F20A12005ACFA06E ] | |||||||||
| F20 | A | 120 | 5 | AC | F | A | 0 | 6 | E |
| type | normally closed | Temp. | tolerance +/-5°C | wire leads UL3398 24 AWG | lead length F=6″ | color black | no insulation | housing – G410 E06 | strip .25″ |
| Cantherm Marking Example |
| F20A type (F20 nc) 12005 response temperature (120°C), tolerance (± 5K) 112C date of manufacture (Nov. 2012), country (C = Canada) |