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Current
Sensitive Thermal Protection For Coils / Windings
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T 10, T 11, T 12, T 21, T22
> Online Tech Info
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)
>
PDF Tech Info, Schematics and More
|
| 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 |
T10B
/ G |
T12A
/ E |
T21A |
T21F |
T22A |
| version |
normally
closed |
normally
open |
normally
closed |
normally
closed |
normally
open |
normally
closed |
| rated
current at 250 V 50/60 Hz (power factor 0.95/0.6) |
2.5
A / 1.6 A |
2.0
A / 1.6 A |
6.3
A / 2.5 A |
10.0
A / 2.0 A |
3.5
A / 2.0 A |
20.0
A / - |
switching
cycles |
10,000
|
| max.
current at 250 V 50/60 Hz (power factor 0.95) |
10.0 A |
12.0
A |
20.0
A |
30.0
A |
switching
cycles under max. current |
300
|
300 |
1,000 |
600 |
| temperature
rating Ta (steps in 5 K) |
(50)
70°C...180°C 2) |
80°C...160°C 5) |
tolerances |
standard:+/-
5 K1) |
| feature
of automatic action VDE |
1.C.M, 2.C, 3.C
|
1.C,
2.C, 3.C |
1.B,
2.C, 3.C |
2.B,
1.C, 3.C |
contact
resistance ( incl. wire of 100 mm ) |
<
50 mΩ |
| 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 |
EN
60730-1 / -2-2 / -2-3 3) /-2-9 |
UL |
UL
2111 / UL 873 4)
|
| CSA
/ cUL |
C22.2
No. 77 / C22.2 No. 24 4) |
1)
available with ± 3K tolerances and smaller hysteresis
2) T10 max. Ta 160°C
3) different power rating
4) on request
5) if T22 used as thermal motor protector
up to 180°C |
| >
Standard wire ( length 100 ± 10
mm, stripped 6 ± 1 mm ) |
| lead |
code |
temp.
max. |
operating
voltage max. |
diameter
insulation |
cross
section diameter2) |
UL
style |
stranded
white |
L300 |
150°
C |
300
V
|
1.57
mm |
AWG24
/ 0.24 mm2 |
3398
|
| L320 |
1.80
mm |
AWG20
/ 0.48 mm2 |
L320
1) |
2.15
mm |
AWG18
/ 0.96 mm2 |
| L330 |
200°
C |
600
V |
0.90
mm |
AWG24
/ 0.24 mm2 |
2557 |
| L340 |
1.26
mm |
AWG20
/ 0.61 mm2 |
| L350
1) |
1.50
mm |
AWG18
/ 0.96 mm2 |
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 |
1.51
mm |
AWG20
/ 0.81 mm |
1)
T21
/ T22 only
2) for T10 / T11 / T12 AWG20 recommended |
| >
Standard insulation |
| control
type |
nc |
no |
code |
illust. |
drawing
dimensions (mm) |
technicals
specification |
approvals |
| T10
|
A |
B |
U250 |
|
different dimensions
for T21/ T22 |
shrink
cap
potted
|
VDE,UL,
cUL |
T11,
T12 |
A |
|
|
|
|
|
U256 |
T22 |
A |
|
| T10 |
A |
B |
U174 |
|
|
cap
of PPS
potted |
VDE,
UL, cUL |
| T11,
T12
|
A
|
|
| >
Specific variations |
| control
type |
nc |
no |
code |
illust. |
drawing
dimensions (mm) |
technicals
specification |
approvals |
| T10
|
A |
B |
|
|
type T11, T12 illustrated |
no
insulation
potted
|
VDE,UL
cUL, CSA |
| T11,
T12 |
A |
|
| T10 |
A |
B |
U112 |
|
|
coated
Ta max. 160°C |
VDE,
UL, cUL |
| T10
T11, T12
|
A
|
|
T11,
T12 |
A |
|
A334 |
|
|
PPS
Cap
PCB thru-hole
Terminals
5.08mm (0.2")
spacing |
VDE,
UL, cUL |
T11,
T12 |
A |
|
A334
U314 |
|
|
PPS
Cap
PCB thru-hole
Terminals
5.08mm (0.2")
spacing |
VDE,
UL, cUL |
T11,
T12 |
A |
|
A334
U315 |
|
|
PPS cap
PCB connector
grid dimension 5.08 |
VDE,
UL, cUL |
T10 |
A |
B |
U293 |
|
|
PPS
housing
potted |
VDE,
UL, cUL |
T11,
T12 |
A |
|
|
T10 |
E |
G |
G502 |
|
|
Aluminum
housing
anodized black M4x6
potted
Ta max. 150°C |
VDE,
UL, cUL |
T11,
T12 |
E |
|
|
|
|
|
|
|
|
No
insulation
potted |
VDE,
UL, cUL, CSA |
|
|
|
U112 |
|
|
Epoxy
coated
Ta Max / 60°C |
VDE,
UL, cUL |
| >
Self-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 |
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Thermal
Cutouts
(800) 561-7207 |
(330)
966-3796 |