Bimetal Cutouts
Temperature Regulators
Temperature Limiters
ADVANTAGES
– high pressure resistance
– high response sensitivity
– numerous applications
– various housings, connections and mounting styles
R 20
R 22
R 30
R 32
R 40
DESCRIPTION
Types R 20/R 22/R 40 are
bimetal detectors
and
temperature regu-
lators.
Types R 30/R 32 are
temperature limiters
(manual reset) without
tripfree mechanism.
The thermal response works via a bimetal snap element electrically
connected to the switch contact.
The switch system is current insensitive.
The thermal switches react only to external thermal effects. Double
contacts ensure high switch performance and long service life.
The housing, base, and the mounting brackets are
voltage-free
(Standard version: base and mounting brackets are aluminium-plated
steel).
Heat transfer occurs directly through the metallic base via convection,
radiation and conduction in gaseous and solid media.
DIMENSIONS
R 20 / R 22 / R 40
R 30 / R 32
mounting flange
rotating 360 degress
mounting flange
rotating 360 degress
Standard version
Standard version
Types: R20/22/30/32/40
03-03-00
1000-Y135
CANTHERM
8415 Mountain Sights Avenue • Montreal (Quebec), H4P 2B8, Canada
Tel: (514) 739-3274 • 1-800-561-7207 • Fax: (514) 739-290
E-mail : sales@cantherm.com • Website: www.cantherm.com
TECHNICAL DATA
Type
R 20 and R 22
R 30 and R 32
R 40
Voltage rating
Current rating at cos
j
= 1.0
Current rating at cos
j
= 0.6
Max. load
at cos
j
= 1,0
250 V 50–60 Hz
110 V 50–60 Hz
60 V DC
42 V DC
6, 12, 24 V DC
Contacts
Normally closed
Normally open
* 250 V 50–60 Hz
* 10.0 A / * 16.0 A
6.3 A
250 V 50–60 Hz
16.0 A
6.3 A
* 250 V 50–60 Hz
* 10.0 A
* 6.3 A
16.0 A / 20.0 A
6.0 A
7.2 A
8.5 A
20.0 A
16.0 A
6.0 A
7.2 A
8.5 A
Switch operations at I
N
* 10 000
0–170 °C / 16 A
–
* 100 000
50–160 °C / 10 A
< 50 m½
0 °C to + 170 °C
±3 % ± 6% ±10%
± 3 K ±5 K ± 10 K
* 175 °C
R 20: 3000 V
eff
50–60 Hz
R 22: 4000 V
eff
50–60 Hz
1500 V
eff
50/60 Hz
Duroplast
on request
R 20 9.5
+0.2
R 22 11.5
+0.2
* 200
* 30 000
Contact resistance
Nominal temperature range
Tolerance
but at least
Max.permanent temperature
Dielectric strength
Housing to earth
Dielectric strength
across open contacts
Housing material
Housing
insulation
Overall height (mm)
< 50 m½
+30 °C to + 160 °C
± 3 % ± 6% ±10%
± 3 K ±5 K ± 10 K
* 175 °C
R 30: 3000 V
eff
50–60 Hz
R 32: 4000 V
eff
50–60 Hz
1500 V
eff
50/60 Hz
Duroplast
on request
R 30 9.5
+0.2
R 32 11.5
+0.2
< 50 m½
+ 50 °C to + 160 °C
± 3 % ± 6% ±10%
± 3 K ±5 K ± 10 K
* 175 °C
3000 V
eff
50–60 Hz
1500 V
eff
50/60 Hz
Duroplast
on request
R 40 12.0
+0.2
Note: * Approved nominal values. Other specific values on request.
AREAS OF APPLICATION
Temperature regulation, temperature monitoring,
temperature limiting and indication in electric
appliances and industrial equipment, machinery
and process engineering.
Examples:
Vacuum cleaners
Ironing machines
Cooking equipment
Dampers
Heat radiators
Hot water heaters
Coffee machines
Egg boilers
Electric appliances
RESET TEMPERATURES
Reset temperature will be between 5 °C and
50 °C below the standard response temperatures.
Electrical house-
hold appliances
Electronic circuits
Machinery
Process engineering
Industrial electric
elements
Electrical components
RESPONSE TEMPERATURE, TOLERANCE,
CODE-NO.
Nominal temperatures between 50 and 160 °C
in 5 °C steps.
Nominal temperatures in geometrical series as per
DIN 323 in °C.
For tolerance, see above – Technical Data.
Temperature code – 3 digits
Minimum rate of temperature change
0.1 K/min., max. 1.0 K/min.
2
INSTALLATION/MOUNTING INFORMATION
Incorporation of the thermo-switch directly in the
heat source or attachment to it, is possible without
additional insulation.
Slightest changes in temperature are conducted
through the metallic housing cap directly to the
bimetal snap disc of the thermo-switch. This ensu-
res that time delays of thermal control systems
are kept very small: insensitive to installation posi-
tion. The dust-proof and damp-proof construction
of the thermo-switch allows various methods of
attachment to, and incorporation in appliances.
To ensure the best heat transition, the cap respec-
tively the mounting bracket should be soldered,
rivetted, screwed or spot-welded to the heat
source.
Types: R20/22/30/32/40
03-03-00
1000-Y135
OPTIONAL VARIATIONS Terminals, Fixings, Housings
Type
R 20/R 22 R 30/R 32 R 40
R 20/R 22 R 30/R 32 R 40
R 20/R 22 R 30/R 32 R 40
R 20/R 22
R 20/R 22
R 40
R 40
Descrip- Descrip-
tion old tion new
A 008
A 117
A 118
A 119
A 120
A 121
A 122
A 123
A 125
A128
A129
A 134
A 135
A 137
A 138
A139
AA008
AB 117
AC118
AD119
AE120
AF121
AG122
AH123
AI125
AK128
AL129
AM134
AN 135
AP137
AR138
AS139
Variations
Terminals
Flat terminal for screw
connection
6.3 x 0.8 mm terminal
4.8 x 0.8 mm terminal
6.3 x 0.8 mm terminal,
angle 90°
4.8 x 0.8 mm terminal,
angle 90°
solder connection
solder connection,
angle 90°
flat conductors
connector pins 4.8 x 0.5 mm
screw connection
crimp connection
A119 with inside angled
connection 6.3 x 0.8 mm
A120 with inside angled
connection 4.8 x 0.8 mm
crimp connection/
screw connection
crimp connection/flat terminal
screw connection/flat terminal
Variations
Fixings
no mounting bracket
3 hole mounting flange
mounting bracket, narrow
mounting bracket-standard
hole dia. 3.2 mm
brass central mounting
M 5 x 6 mm
brass central mounting
M 4 x 8 mm
fixed mounting flange, steel,
hole distance 23 mm, angle 0°
fixed mounting flange, steel,
hole distance 23 mm, angle 45°
fixed mounting flange, steel,
hole distance 23 mm, angle 90°
**
*
*
**
*
**
R 20/R 22
**
R 20/R 22
**
**
R 20/R 22
R 30/R 32
R 30/R 32
R 40
R 40
G 146
G 147
G 408
G 409
GG146
GH147
GI408
GK409
R 20/R 22
R 30/R 32
R 40
R 32
R 40
G 129
G 130
G 135
G 145
GC129
GD130
GE135
GF145
R 20/R 22
R 30
R 20/R 22 R 30/R 32 R 40
Type
R 40
B 255
BV255
Descrip- Descrip-
tion old tion new
G 108
G128
GA108
GB128
**
**
**
**
**
*
**
R 20/R 22 R 30/R 32 R 40
*
**
**
**
R 20/R 22 R 30/R 32 R 40
R 20/R 22 R 30/R 32 R 40
R 20/R 22 R 30/R 32 R 40
R 20/R 22 R 30/R 32 R 40
R 20/R 22 R 30/R 32 R 40
B 235
B 236
B 237
B 238
B 250
BP235
BR236
BS237
BT238
BK250
R 20/R 22 R 30/R 32 R 40
B 228
BN228
B 227
BM227
R 20/R 22 R 30/R 32 R 40
B 226
BL226
Type
R 20/R 22 R 30/R 32 R 40
R 20/R 22 R 30/R 32 R 40
Descrip- Descrip-
tion old tion new
B 223
B 225
BI223
BF225
Variations
Fixings
fixed mounting flange, steel,
hole distance 23 mm, angle 135°
fixed mounting flange, steel,
hole distance 40 mm, narrow,
angle 0°
fixed mounting flange, steel,
hole distance 40 mm, narrow,
angle 45°
fixed mounting flange, steel,
hole distance 40 mm, narrow,
angle 90°
fixed mounting flange, steel,
hole distance 40 mm, narrow,
angle 135°
raised flange,
hole distance 23 mm, angle 0°
raised flange,
hole distance 23 mm, anglel 45°
raised flange,
hole distance 23 mm, angle 90°
raised flange,
hole distance 23 mm, angle 135°
with rotating mounting flange
(Standard)
hole dia. 3.8 mm
mounting element
Variations
Housings
hexagon threaded sleeve, brass,
with flat terminals 6.3 x 0.8 mm
without rubber cap,
with reset pin
without rubber cap,
with reset pin
plastic cover horizontal,
for leads and cable
housing without reset pin
hexagon threaded sleeve, brass,
with sensor and leads 300 mm
hard paper sleeve
voltage-free housing with flange,
for leads
cap silicone R 300019
without reset cap
*
*
*
*
**
**
**
R 20/R 22 R 30/R 32 R 40
R 20/R 22
R 20/R 22
R 20/R 22
R 40
R 40
R 40
*
**
**
**
**
**
R 20/R 22 R 30/R 32 R 40
R 20/R 22 R 30/R 32 R 40
R 20/R 22
R 20/R 22
R 40
R 40
R 20/R 22 R 30/R 32 R 40
R 20/R 22 R 30/R 32 R 40
R 20/R 22 R 30/R 32 R 40
Type
R 20/R 22 R 30/R 32 R 40
R 20/R 22 R 30/R 32 R 40
R 20/R 22 R 30/R 32 R 40
R 20/R 22 R 30/R 32 R 40
R 20/R 22 R 30/R 32 R 40
R 20/R 22 R 30/R 32 R 40
R 20/R 22 R 30/R 32 R 40
R 20/R 22 R 30/R 32 R 40
R 20/R 22 R 30/R 32 R 40
*
Descrip- Descrip-
tion old tion new
B000
B 120
B 214
B 215
B 217
B 218
B 220
B 221
B 222
BX000
BA120
BB214
BC215
BD217
BE218
BU220
BG221
BH222
**
**
**
**
**
**
**
Marking
(example)
Manufactur = MIC
Version
= BD16
Type
R22
Terminals
A
Version
= ABXX
Temperature = C029
Housing
X
Standard
X
Ref. letter
B
MIC
ABXX
E BD16
CO29
Reference to: page 4/5 · ** see illustrations
** not illustrated
Fixing
B
Code letter
D
Base
1
1996
6
60 °C ±5 K
C029
A
B
X
X
Indicator for
housing options A-Z
G for housing
Indicator for
terminal options A-Z
A for terminals
B
D
1
6
Year of manufacture 0-9 (6 = 1996)
Ref. no. for base
1 = nickel plated steel (standard)
2 = stainless steel
3 = aluminium, anodised
4 = aluminium
Indicator for
fixing option A-Z
B for fixing
C
0
2
9
Code-No. for response
temp and tolerance
R 20 / R 22 / R 30 / R 32 / R 40
B 120
3 hole mounting flange
R 20 / R 22 / R 30 / R 32 / R 40
B 255
Mounting element
3
Types: R20/22/30/32/40
03-03-00
1000-Y135
Types: R20/22/30/32/40
03-03-00
1000-Y135
4
5
Types: R20/22/30/32/40
03-03-00
1000-Y135
