CANTHERM
Thermal Cutouts

< Back to Thermal Cutouts

 Protection For Coils / Windings 

F11, F20, F21 (Single Contacts) > Online Tech Info
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.

PDF (F11, F20, F21)  > PDF Tech Info

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

Benefits
- Small dimensions, 4 mm high only
- Shock- and vibrations tested
- Leadframe version
- Tested for audio, video applications (EN 60065)


> Technical Data
ratings
F11A / E
F20A / E
F20B / G
F21A / E
version
normally closed
normally open
normally closed
rated current at 250 V 50/60 Hz (power factor 0.95/0.6)
2.0 A / 1.6 A
2.0 A / 1.6 A
3.0 A / 3.0 A
6.3 A / 1.0 A
switching cycles
10,000
10,000
700
max. current at 250 V 50/60 Hz (power factor 0.95)
6.3 A
8.0 A
switching cycles under max. current
100
temperature rating Ta (steps in 5 K)
70ºC...160ºC
70ºC...155ºC
70ºC...160ºC
tolerances
standard:+/- 5 K
feature of automatic action
1.B, 2.B.M, 1.C, 3.C
2.B, 1.C
contact resistance ( incl. wire of 100 mm )
< 50 m
hysteresis
30 K ± 15 K
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 / -2-2 / -2-3 1) /-2-9
UL
UL 2111 / UL 873
CSA
C22.2 No. 77 / C22.2 No. 24 2)
1) different power rating
2) on demand

 

> Standard wire ( length 100 ± 10 mm, stripped 6 ± 1 mm )
lead
code
temp. max.
operating voltage max.
diameter insulation
cross section diameter
UL style
stranded white
L300
150° C
300 V
1.57 mm
AWG24 / 0.21 mm2
3398
L310
1.80 mm
AWG20 / 0.48 mm2
L330
200° C
600 V
0.90 mm
AWG24 / 0.24 mm2
3557
solid yellow
L400
150° C
300 V
1.40 mm
AWG24 / 0.51 mm
3398
L410
1.65 mm
AWG20 / 0.81 mm
L430
200° C
300 V
1.21 mm
AWG24 / 0.51 mm
1332
L440
1.71 mm
AWG20 / 0.81 mm

 

> Standard insulation
control type
nc
no
code
illust.
drawing dimensions (mm)
technicals specification
approvals
F11, F21

A

B
U254
 
 
different dimensions
for F20, F21
shrink cap
potted
Ta max. 155ºC
VDE,UL
F20
A  
F11
A
 
U198
 

 

different dimensions
for F20, F21

cap of PPS potted
VDE, UL
F20
A
 
U185
F21
A B

 

> Specific variations
control type
nc
no
code
illust.
drawing dimensions (mm)
technical specification
approvals
F11

A

 
 
 
 
not insulated
potted
VDE,UL, CSA

F20

A

B

 
not insulated
potted
VDE,UL, CSA
F21
A  

F11, F21

A

B

U112

different dimensions
for F20, F21
coated
VDE,UL
F20
A  

F20

A

B

A150 U280
housing of PPS
leadframe leads
grid dimension 5.08
potted
VDE,UL
F21
A  

F11, F21

A

 

 

A800

different dimensions
for F20, F21
not insulated
potted
VDE,UL
F20
A B

F20

E

G

G700
aluminum housing
thread M4x6
potted
Attention: Ta max. 150ºC
VDE,UL
F21
E  
F11
A
 
U281
housing of PPS
potted
VDE,UL

F11, F21

A

B

A150 U112

different dimensions
for F20, F21
leadframe leads
grid dimension 5.08
coated
VDE,UL
F20
A  

 


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.

 

CANTHERM 8415 Mountain Sights Avenue, Montreal (Quebec), H4P 2B8  Canada
 Tel 1-800-561-7207 / (514) 739-3274 | Fax (514) 739-2902 | E-mail sales@cantherm.com

Anglais
 
 © 2008, Canadian Thermostats & Control Devices Ltd.