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Thermal Protector SH5

Power class: 25,0 A to 75,0 A
Type series: H5

  • normally closed
  • resets automatically
  • with connector cables
  • Mylar®-Nomex®
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Thermal Protector SH5
Thermal Protector SH5
Thermal Protector SH5
Thermal Protector SH5

Switchgear consisting of a movable silver contact (1), a contact bearing pin (2), a spring snap-in disc (3), a bimetallic disc (4) and a contact tongue (5) which is riveted into one another, undetachable and fixed in a positive lock and self-aligning between a conductive, heat transferring housing (6) and a contact cap (7) made of steel that is insulated from it, plus a stationary countercontact (8). At the same time, the switchgear is supported by the contact tongue (5) acting as a transfer element for electric current which is held between a supporting collar and a circumferential ring. As such, the switchgear underlying it, that is also stuck out from the movable contact (1), can continuously work (exposed) by mechanical loads without the contact pressure defined by the spring snap-in disc (3) diminishing. As soon as the bimetallic disc (4) reaches its rated switching temperature, it effectively springs against the throw force of the spring snap-in disc (3) into its inverted position. The contact is abruptly opened. The temperature will now fall. The bimetallic disc (4) will only snap back upon reaching a defined spring back temperature and the contact is abruptly closed again.

Technical specifications

Nominal switching temperature (NST) in 5°C
80 °C - 180 °C
Tolerance (standard)
±10 K
Reverse switch temperature (RST)
UL
≥ 35 °C
VDE
≥ 35 °C
(defined reset temperature possible on customer request)
Installation height from
6.0 mm
Diameter
11.7 mm
Length of the insulation cap
19.5 mm
Resistance to impregnation
suitable
Suitable for installation in protection class
I+II
Pressure resistance to the switch housing
300 N
Standard connection
Lead wire 1.0 mm² / AWG18
Operating voltage range AC / DC
up until 500 V AC / 14 V DC
Rated voltage AC
250V
Rated current AC cos ϕ = 1.0 / cycles
30.0 A / 10,000
Rated current AC cos ϕ = 1.0 / cycles
50.0 A / 3,000
Rated voltage DC
12.0 V
Max. switching current DC / cycles
60.0 A / 10,000
High voltage resistance
2.0 kV
Total bounce time
< 1 ms
Contact resistance (according to MIL-STD. R5757)
≤ 25 mΩ
Vibration resistance at 10 ... 60 Hz
100 m/s²

Approbation

IEC VDE UL CQC
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