Jone Ye
Joyce Lin
Lisa zheng
STH-N20 Thermal Relay With Overload Protection
Product Description
Founded in 2005, Zhejiang SPX Electric Appliance Co., Ltd. is delighted to present the STH-N series Thermal Relay With Overload Protection, a premium solution tailored for the safeguarding of general AC motors. Specifically designed for AC 50/60Hz systems, this relay is engineered for long-term or intermittent operations with a rated operating voltage of up to 690V and a current capacity of 630A.
This versatile relay offers comprehensive protection, including features such as phase break protection, temperature compensation, and a trip indication function. With convenient automatic and manual reset options, it adapts seamlessly to varying operational needs. The relay can be effortlessly integrated with contactors to enhance its functionality, or it can be installed independently, providing flexibility in application.
As a distinguished supplier based in China, SPX Electric Appliance Co., Ltd. is committed to delivering high-quality solutions. The STH-N series exemplifies our dedication to providing reliable products in the global market. Join us as we aspire to be your trusted, long-term partner in ensuring the efficiency and protection of your AC motor systems.
The STH-N20 thermal relay is suitable for S-C21/25AC Contactor
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Frame(A) |
STH-N18(TH-N18) |
STH-N25(TH-N25) |
STH-N50(TH-N50) |
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Suitabie AC contactor |
S-C10/12 |
S-C21/25 |
S-C50/95 |
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Aux contact structure |
Manual or Auto retum |
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Adjust range selcet(A) |
Select(A) |
Adjust range(A) |
Select(A) |
Adjust range(A) |
Select(A) |
Adjust range(A) |
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0.24A |
0.2~0.32 |
1.3A |
1~1.6 |
15A |
12~18 |
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0.35A |
0.28~0.42 |
1.7A |
1.4~2.0 |
19A |
16~22 |
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0.5A |
0.4~0.6 |
2.1A |
1.7~2.5 |
22A |
18~26 |
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0.7A |
0.55~0.85 |
2.5A |
2~3 |
29A |
24~34 |
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0.9A |
0.7~1.1 |
3.6A |
2.8~4.4 |
35A |
30~40 |
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1.3A |
1~1.6 |
5A |
4~6 |
42A |
34~50 |
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1.7A |
1.4~2.0 |
6.6A |
5.2~8 |
54A |
43~65 |
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2.1A |
1.7~2.5 |
9A |
7~11 |
67A |
54~80 |
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2.5A |
2~3 |
11A |
9~13 |
82A |
65~93 |
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3.6A |
2.8~4.4 |
15A |
12~18 |
95A |
85~105 |
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5A |
4~6 |
19A |
16~22 |
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6.6A |
5.2~8 |
22A |
18~26 |
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9A |
7~11 |
29A |
24~34 |
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11A |
9~13 |
35A |
30~40 |
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Aux contact structure |
1a1b(1NO+1NC) |
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Outline and installation dimension |
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Type |
L |
W |
H |
φD |
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TH-N20 |
63 |
51 |
79 |
4.5 |
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TH-N60 |
89 |
57 |
83.5 |
4.5 |
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SPX Thermal Relay With Overload Protection Feature And Application
Environmentally raw material
Flame retardant material, heat-resisting
Long machine life
3C certificate