Jone Ye
Joyce Lin
Poekah Huang
STH-T50 AC 50/60Hz Thermal Magnetic Relay Motor Protection
Product Description
SPX's high-quality STH-T series AC thermal relays are suitable for 50/60Hz power frequency and have a rated working voltage of up to 690V and a rated current of up to 630A. This thermal relay is designed for overload protection and phase-break protection of general AC motors, and can provide reliable protection functions under long-term or intermittent operation. It not only has phase-break protection function, but also is equipped with a temperature compensation mechanism to ensure stable operation under different environmental conditions. In addition, the device also has a trip indication function, which can clearly display the working status of the device. Users can choose automatic or manual reset to restore the normal working state of the equipment, which increases the flexibility of use. It is worth mentioning that this thermal relay can be used in conjunction with a contactor or installed independently to meet the needs of different application scenarios and ensure the safe and efficient operation of the motor.
The STH-T25 thermal relay is suitable for S-M20/25 AC Contactor.
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Frame(A) |
STH-T18(TH-T18) |
STH-T25(TH-T25) |
STH-T50(TH-T50) |
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Suitabie AC contactor |
S-M10/12 |
S-M20/25 |
S-M35/50 |
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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 |
29 |
24~34 |
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0.35A |
0.28~0.42 |
1.7A |
1.4~2.0 |
35 |
30~40 |
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0.5A |
0.4~0.6 |
2.1A |
1.7~2.5 |
42 |
34~50 |
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0.7A |
0.55~0.85 |
2.5A |
2~3 |
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0.9A |
0.7~1.1 |
3.6A |
2.8~4.4 |
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1.3A |
1~1.6 |
5A |
4~6 |
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1.7A |
1.4~2.0 |
6.6A |
5.2~8 |
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2.1A |
1.7~2.5 |
9A |
7~11 |
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2.5A |
2~3 |
11A |
9~13 |
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3.6A |
2.8~4.4 |
15A |
12~18 |
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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-T25 |
63 |
51 |
81 |
4.5 |
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SPX AC 50/60Hz Thermal Relay Feature And Application
Environmentally raw material
Flame retardant material, heat-resisting
Long machine life
3C certificate
Production process
