Home > Products > R27, R28, R29
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Temperature Regulators / Temperature Limiters

1/2” Disc Bimetal Cut-outs/Thermostats

– Up to 100,000 cycles

– Various terminals on-hand

– Small tolerances and hysteresis available

– Response temperatures from 0°C up to 260°C

R27, R28, R29

Applications

Houshold appliances, Electronics, Machinery

Technical Data (R27 R28 R29)

ratings \ control type R28 R27 R29
11EN 03EN 52N 60EN1) 05EN 15N 23EN
function automoatic manual
version normally closed / normally open normally closed
VDE rated current at 250 Vac (cos 0,95) 16 A 10 A 10 A 10 A 16 A 16 A 16 A
switching cycles 10,000 100,000 100,000 100,000 6,000 6,000 3,000
temperature range Ta (steps in 5 K) 0 °C … 150 °C 0 °C … 150 °C 0 °C … 230°C2) 0 °C … 150 °C 0 °C … 150 °C 0 °C … 250°C 0 °C … 150 °C
UL rated current at 250 Vac (cos 0,95) 15A/10A 15A/10A 15A/10A 15A/10A 16A/16A 15A/10A
switching cycles 100,000 100,000 100,000 6,000 6,000 6,000
temperature range Ta ( steps in 5 K ) 0 °C … 150 °C 0 °C … 150 °C 0 °C … 230 °C 0 °C … 150 °C 0 °C … 250 °C 0 °C … 150 °C
tolerances   TA <100°C: ± 3 K / TA >100°C: ± 4 K / TA >140°C: ± 5 K
contact resistance     < 30 mΩ
hysteresis / reset temperature   TA <100°C: 10 K ± 4 K / TA >100°C: 15 K ± 5 K / TA >140°C: 20 K ± 5 K customer-specific
degrees of protection provided by enclosures ( EN 60529 ) IPOO (R28 60EN IP54)
suitable for use in protection class I, II
approval VDE/ENEC EN versions have VDE approvals: EN 60730-1 / -2-9 plus UL/CSA listings
UL N versions have UL and CSA listing: UL 873
CSA N versions have UL and CSA listing: C22.2 No. 24 3)
1) not approved
2) type R28 55H up to 260°C
3) different approved ratings

Standard Types

type nc no code illustration drawing
dimensions (mm)
tech description approvals
R28 11EN 1 3 11EN=Plastic
10EN=ceramicdielectric strength
2,000 Vac
terminals 6.3 x 0.8
housing thermosetting plastic 9mm, moving bracket, small
cap aluminum
VDE, UL, CSA
R28 03EN 1 3 standard

dielectric strength
2,000 Vac

terminals 6.3 x 0.8,
housing thermosetting
plastic 12mm,
moving bracket small,
cap aluminium
VDE, UL, CSA
R28 52N 1 3 plastic<170†C or
ceramic>170†Cdielectric strength 2,000 Vac
terminals 6.3 x 0.8,
housing ceramic 12mm,
moving bracket small,
cap aluminium
VDE, UL, CSA
R27 05EN 1 manual

dielectric strength 1,800 Vac

terminals 6.3 x 0.8,
housing thermosetting plastic, moving bracket small,
cap aluminium,
reset pin
VDE, UL, CSA
R27 15N 1 manual

dielectric strength 1,800 Vac

terminals 6.3 x 0.8,
housing ceramic,
moving bracket small,
cap aluminium,
reset pin ceramic
VDE, UL, CSA
R29 23EN 1 manual

dielectric strength 2,000 Vac

terminals 6.3 x 0.8,
housing thermosetting plastic,
moving bracket small,
cap aluminium,
reset pin
VDE, UL, cUL
R28 60EN 1 3 tight against humidity
dielectric strength
1,800 Vac
lead wire 1.25mm2,
housing thermosetting plastic,
fix bracket,
cap aluminium,
degree of protection IP54
VDE

Brackets

code used in type illustration drawing
dimensions (mm)
tech description approvals
4 R27, R28, R29 aluminum loose bracket,

small

use with T cap

VDE, UL, CSA
3 R27, R28, R29 stainless steel loose

bracket

use with V cap

VDE, UL, CSA
S R27, R28, R29 stud of

M5 x 6 brass,SW17

(S5 shown, other

variations available)

VDE, UL, CSA
B (+ angle) R27, R28, R29 fix bracket

possible angles:

0 / 45 / 90 / 135 deg

VDE, UL, CSA

Terminals

code used in type illustration drawing
dimensions (mm)
tech description approvals
brass: 03 (0°)

brass: 09 (45°)

brass: 04 (90°)

steel: 93 (0°)

steel: 94 (90°)

R27, R28, R29 terminals 6.3 x 0.8

brass nickel plated

up to TA max.

150°C >150°C

steel nickel plated

also available:

angle 45 / 90 deg

VDE, UL, CSA
brass: 05 (0°)

brass: 10 (45°)

brass: 06 (90°) steel: 95 (0°)

steel: 96 (90°)

R27, R28, R29 terminals 4.8 x 0.5

brass nickel plated

up to TA max.

150°C >150°C steel

nickel plated also

available:

angle 45 / 90 deg

VDE, UL, CSA
00 R27, R28 solder terminals VDE, UL, CSA
SA R27, R28 PCB terminals

solder terminals

VDE, UL, CSA
41 (0°)

42 (90°)

R27, R28, R29 solder terminals,

nickel plated, also

available: angle 90 deg

VDE, UL, CSA
brass: 45 (0°) brass: 46 (90°) R27, R28, R29 terminals 4.8 x 0.8

brass nickel plated

up to TA max.

150°C also available:

angle 90 deg

VDE, UL, CSA

Caps

Standard cap, material aluminium (code T)

Use with bracket #4

Stainless steel cap (code V) for large loose bracket #3 or fixed bracket B +angle

Deviations from standard controls (caps, terminals, fixings) on request.

Especially for electronic applications with voltage 6…120 Vac / 6…30 Vdc and current 10…100 mA, there are switches with crossbar- contacts available. (code P)

Controls as single operation device (SOD) up to 150°C and reset temperature -35°C are available (type 81ES).

Ordering & Marking Example

Cantherm Ordering Example [ R2803EN15T03450+/-340+/-4 ]
R28 03 E N 1 5 T 03 4 50+/-3 40+/-4
type base type European version type of contact (N normal contact / P low current) contact execution (1 normally closed / 3 normally open) housing plastic 1=UL/CSA; 5=UL/CSA/VDE (Use w/ E) 2=ceramic cap code terminal code fixing code response temperature reset temperature
Marking
A100 norm. closed (B norm. open) response temperature
03EN XXXX type manufacture code
XXXX date of manufacture