TD3.7 SQUARE D Thermal Overload Relay

Review SQUARE D Squaretd3.7 Thermal Overload Relay 3.7/5.5a 3p 660v Series Class

The Square TD3.7 9065 Thermal Overload Relay is a versatile electrical component designed to protect electrical circuits from overheating and potential damage. This particular model is rated for a thermal trip current of 3.7/5.5 Amperes, making it suitable for various applications where a moderate current flow is expected.

The relay operates using a thermal element that responds to heat, triggering the relay to disconnect the circuit when it reaches a predetermined temperature. This mechanism is essential in preventing overheating, which can lead to electrical fires or other safety hazards.

The Square TD3.7 9065 Thermal Overload Relay is designed as a 3-pole, 660-volt device. This means it has three separate contacts NO (Normally Open), NC (Normally Closed), and CO (Common) allowing for various wiring configurations to meet the specific requirements of different applications.

The relay body is compact, with dimensions of 67.6mm x 38.4mm x 30.3mm (L x W x H), making it a suitable choice for installations where space is limited. Despite its small size, the Square TD3.7 9065 Thermal Overload Relay offers robust performance and reliable protection against electrical overheating.

This thermal overload relay is rated for a current of up to 3.7 Amperes at a normal temperature, with a trip temperature of 85 C (185 F) for the 3.7 Amperes rating and 90 C (194 F) for the 5.5 Amperes rating. The thermal element is designed to provide consistent and accurate temperature readings, ensuring that the relay disconnects the circuit precisely when it reaches the preset temperature.

The Square TD3.7 9065 Thermal Overload Relay comes with a corrosion-resistant terminal cover, ensuring that the device can perform optimally in harsh environments where moisture or other corrosive substances might be present. Additionally, the relay is UL and CSA listed, ensuring that it meets the stringent safety standards set by these organizations.

In conclusion, the Square TD3.7 9065 Thermal Overload Relay is a high-performance, compact, and reliable electrical component designed to protect electrical circuits from overheating. Its 3.7/5.5 Amperes rating, 3-pole configuration, and 660-volt capability make it suitable for various applications across different industries. With its robust design and corrosion-resistant terminal cover, this thermal overload relay offers excellent protection against electrical overheating while ensuring reliable and consistent performance.

The Square TD3.7 9065 Thermal Overload Relay is a protective device used to prevent overheating in electrical circuits. Here are some pros and cons of buying this relay:

1. High voltage rating: This relay is rated for 660 volts, making it suitable for use in high voltage applications.

2. Overload protection: The thermal overload feature of this relay helps prevent damage to electrical components by interrupting the circuit when it gets too hot.

3. Versatile: This relay is rated for both 3.7 and 5.5 amps, making it a good choice for applications where the current may vary.

4. Durable: The Square TD3.7 9065 Thermal Overload Relay is built with high-quality materials and is designed to be long-lasting.

1. Complex installation: Installing this relay may require some technical knowledge and experience.

2. Limited documentation: Some users have reported that the documentation provided with this relay is not comprehensive enough.

3. Expensive: Compared to some other relays on the market, this one may be more expensive.

The Square TD3.7 9065 Thermal Overload Relay is a high-quality protective device suitable for use in high voltage applications where overload protection is required. Its versatility, durability, and overload protection features make it a good investment for electrical systems where reliability is crucial. However, its complex installation process, limited documentation, and higher price point may be drawbacks for some users. Ultimately, the decision to buy this relay will depend on the specific requirements of your electrical application and your budget.

If you are looking for a reliable thermal overload relay for high voltage applications, the Square TD3.7 9065 is a good option to consider. However, be prepared for a complex installation process and a higher price point compared to some other relays on the market. Make sure to thoroughly review the documentation provided with the relay and consult with a qualified electrician if you have any doubts about the installation process.

Details:

May show some signs of wear due to age and storage. Condition notes: new, open box.

specifications genpurrelays:

• brand: Square D
• mpn: Td3.7

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• method: money back
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• started: march 25, 2026
• prices: $25.00–$118.75
• item condition:
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  • New – Open box
  • New

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• category: Business & Industrial > Electrical Equipment Supplies > General Purpose Relays

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