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Supco Limit Switch: Open on Rise, SPDT, 120°F Closing, 140°F Opening - Surface Mount Limit Controls
SupcoSurface Mount Limit Controls

Supco Limit Switch: Open on Rise, SPDT, 120°F Closing, 140°F Opening

SKU 3G-OTH-69070

Brand
Supco
Item
Limit Switch: Open on Rise, SPDT, 120°F Closing, 140°F Opening
Category
Surface Mount Limit Controls
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Technical Specifications

Supco
Manufacturer Part Number
LD140
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Supco Products
3G Electric (S) Pte. Ltd. — Singapore

Frequently Asked Questions

What is the Supco LD140 limit switch used for?

The Supco LD140 is a surface-mount limit control used in HVAC and industrial equipment to monitor temperature. It opens on temperature rise at 140°F and closes at 120°F, protecting systems from overheating. 3G Electric supplies this SPDT switch rated for 240V AC across 14 industrial departments.

What are the specifications of the Supco LD140 limit switch?

The Supco LD140 is an SPDT limit switch with open-on-rise action: it opens at 140°F and closes at 120°F. It is rated for 240V AC and is a surface-mount control. 3G Electric sources this genuine SUPCO part for global delivery, handling logistics and customs.

Where to buy the Supco LD140 limit switch worldwide?

3G Electric supplies the Supco LD140 limit switch worldwide. As a global industrial solutions provider, we handle full logistics and customs clearance to deliver this SPDT, 240V AC surface-mount control to your facility. Contact us for availability and lead time.

How to install the Supco LD140 limit switch?

Mount the Supco LD140 securely to a clean surface using appropriate hardware. Wire the SPDT contacts per your control circuit, ensuring the 240V AC rating is not exceeded. Verify the 140°F opening and 120°F closing setpoints with a calibrated thermometer. 3G Electric can provide sourcing support.

Used in

Common applications for Supco
Commercial refrigeration display cases — Supco RO82 relay and CSS-25U starter for compressor motor control without run capacitors
Medium-load HVAC systems — Supco SPP 6/SPP 8 hard-start devices to reduce compressor inrush current and extend motor lifespan
Cold-chain pharmaceutical and food storage — SL300TH temperature–humidity data logger for continuous monitoring and regulatory documentation
Refrigerant service operations — Piercing valves and perforator cocks in 1/2" and 5/8" sizes for fast, non-invasive line access
Compressor thermal management — Universal Compressor Door for reducing shell temperature and improving efficiency in hot ambient conditions
Retrofit and field repairs — Supco controls with Quick Connect terminals for rapid installation in legacy refrigeration circuits

Supco Products

3G Electric supplies Supco surface mount limit controls. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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