Thermal Overload Relay
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Thermal Overload Relay

Zhejiang SPX Electric Appliance Co.,Ltd. founded in 2005, which is one of the most reliable manufacturer and supplier for Thermal Overload Relay in China. We have been specialized in thermal relay for many years. Our products have a good price advantage and cover most of the Southeast Asia and MiddleEast and American markets. We look forward to becoming your long-term partner in China.

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Product Description


SPX STH-T series Thermal Overload Relay is suitable for AC 50/60Hz, rated operating voltage to 690V, current to 630A long-term or intermittent long-term operation of the general AC motor overload and phase break protection, with phase break protection, temperature compensation, trip indication function, and can be automatically and manually reset, can be inserted with contactors. It can also be installed independently.

The STH-T25 thermal relay is suitable for S-M20/25 AC Contactor.

Frame(A) STH-T18(TH-T18) STH-T25(TH-T25) STH-T50(TH-T50)
Suitabie AC contactor S-M10/12 S-M20/25 S-M35/50
Aux contact structure Manual or Auto retum

Adjust range selcet(A)
Select(A) Adjust range(A) Select(A) Adjust range(A) Select(A) Adjust range(A)
0.24A 0.2~0.32 1.3A 1~1.6 29 24~34
0.35A 0.28~0.42 1.7A 1.4~2.0 35 30~40
0.5A 0.4~0.6 2.1A 1.7~2.5 42 34~50
0.7A 0.55~0.85 2.5A 2~3

0.9A 0.7~1.1 3.6A 2.8~4.4

1.3A 1~1.6 5A 4~6

1.7A 1.4~2.0 6.6A 5.2~8

2.1A 1.7~2.5 9A 7~11

2.5A 2~3 11A 9~13

3.6A 2.8~4.4 15A 12~18

5A 4~6 19A 16~22

6.6A 5.2~8 22A 18~26

9A 7~11 29A 24~34

11A 9~13 35A 30~40

Aux contact structure 1a1b(1NO+1NC)
Outline and installation dimension


Type L W H φD

TH-T25 63 51 81 4.5


SPX Thermal Overload Relay Feature And Application

Environmentally raw material
Flame retardant material, heat-resisting
Long machine life
3C certificate

Hot Tags: Thermal Overload Relay, China, Manufacturer, Supplier, Factory, Quality, Customized

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