ST07 H Thermal protector

Power class: 10A

Type series: ST07

normally closed
does not reset automatically
with connector cables
transparent PET cap insulation
ST07H_1
ST07H_3
ST07H_2

ST07 H Thermal protector

Main parts

1) Insulating paper  2) Conductive housing  3) bimetal disc 

4) movable contact  5) stationary silver contact  6) base  7) iron nails


Construction

The stationary silver contact is welded on the base, the movable contact is welded to one end of the bimetal disc, the other end is welded to the housing by iron nails. The movable contact is in close contact with the stationary silver contact under the pre-pressure of the bimetal disc, the base and the housing are isolated by  insulating paper. The current first passes through the movable contacts connected to the housing and bimetal disc,  and then through the stationary silver contacts on the base to form a loop.


Function

When the circuit works normally,  the contact is in a closed state. When the rated operating temperature is reached, the bimetal disc is deformed by heat and snap rapidly, cut off the circuit. After that, the device begins to cool down. When it reaches the defined reset temperature, the bimetal disc and the spring disc snaps back into its start position, the contacts will close again, and the device starts working again.


PRODUCT PARAMETER

Nominal switching temperature (NST) in 5°C
70 °C - 180 °C
Tolerance (standard)
±5K
Reverse switch temperature (RST) tolerance
See datasheet
Thickness
5.1mm
Diameter
10.9mm
Length of the insulation cap
33mm
Resistance to impregnation
suitable
Suitable for installation in protection class
I+ll
Pressure resistance to the switch housing
500N
Standard connection
0.81 mm² / AWG18
Available approvals
UL/VDE/CQC/CB/KC
Operating voltage range AC/DC
up until 500 V AC / 24 V DC
Rated voltage AC
250 V(VDE)
277 V(UL)
Rated current AC cos ϕ = 1.0 /cycles
10A / 10,000
Rated voltage DC
16.0 V
Max. switching current DC /cycles
20 A / 10,000
Insulation voltage
1.5 KV
Contact resistance
≤ 50 mΩ
Vibration resistance at 10 ... 60 Hz
100 m/s²

PRODUCT PARAMETER

CONTACT US

Sales:Don Qu

Phone:+86 183 5813 1344

E-mail:sa8@saftty.com

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