HG4C-1004 C.P. CLARE Mercury Wetted Reed Relay Socket

Review C.P. CLARE Mercury Wetted Reed Relay Socket

The CP Clare HG4C-1004 Mercury Wetted Reed Relay is a versatile and reliable electrical switching component, ideal for various applications where contact reliability and durability are essential. This 4-Pole, 2-Throw (4PDT) relay boasts a mercury wetted reed contact system, which ensures precise and dependable switching performance, even in harsh environments.

The HG4C-1004 Mercury Wetted Reed Relay from CP Clare features a compact size with dimensions of 2.75 inches (70 mm) in length, 1.69 inches (43 mm) in width, and 1.02 inches (26 mm) in height. Weighing only 0.25 pounds (113 grams), this lightweight yet robust relay is suitable for space-constrained installations.

The 4PDT socket offers four normally open (NO) contacts and four normally closed (NC) contacts. Each contact can handle up to 10 amperes (A) of current at a maximum operating voltage of 250 volts (V) AC or DC. The contacts are gold-plated to ensure superior conductivity and long-lasting performance.

This Mercury Wetted Reed Relay from CP Clare is designed for use in demanding environments and applications. Its mercury-wetted contacts provide excellent switching performance, even when subjected to extreme temperatures, humidity, and vibrations. The relay is also RoHS compliant, ensuring that it meets stringent environmental standards.

The HG4C-1004 Mercury Wetted Reed Relay is easy to install, with clear markings on the relay housing for easy identification of the NO and NC contacts. It comes with a 0.30 inch (7.62 mm) mounting hole pattern, allowing for flexible mounting options. The relay operates on a coil voltage of 12 volts DC, and it features a quiet operating mechanism, making it suitable for applications where minimal noise is important.

In summary, the CP Clare HG4C-1004 Mercury Wetted Reed Relay is an advanced and dependable electrical switching solution for various applications. Its compact size, rugged design, and reliable mercury wetted reed contacts make it a top choice for engineers and technicians requiring high contact reliability and durability.

Pros and Cons of buying a CP Clare HG4C-1004 Mercury Wetted Reed Relay 4PDT Socket

The CP Clare HG4C-1004 Mercury Wetted Reed Relay 4PDT Socket is a commonly used electrical component in various applications. This relay offers several advantages and disadvantages, which are essential to consider before making a purchasing decision.

1. Wide Operating Temperature Range: The relay can operate between -40 C to 85 C, making it suitable for use in various environments and applications.

2. High Contact Rating: The relay can handle a high number of contacts per cycle without wearing out, ensuring reliable operation over extended periods.

3. Mercury Wetted Reed Contacts: These contacts offer excellent conductivity and make the relay suitable for applications requiring fast switching speeds.

4. Compact Size: The HG4C-1004 is a small and compact relay, making it ideal for space-constrained installations.

5. RoHS Compliance: The relay is compliant with the European Union's Restriction of Hazardous Substances Directive, making it an environmentally-friendly choice for many applications.

1. High Power Consumption: The Mercury Wetted Reed Relay consumes more power compared to other types of relays, which can result in increased energy costs over time.

2. Contacts Wear Out: Although mercury contacts offer excellent conductivity, they wear out faster than other types of contacts, requiring more frequent maintenance or replacement.

3. Fragile Nature: Mercury Wetted Reed Relays are more fragile than other types of relays due to the use of mercury, which can be hazardous if mishandled or spilled.

4. Cost: Mercury Wetted Reed Relays are more expensive than other types of relays due to the use of mercury and the specialized manufacturing process required to produce them.

The CP Clare HG4C-1004 Mercury Wetted Reed Relay 4PDT Socket offers several advantages, such as a wide operating temperature range, high contact rating, mercury wetted reed contacts, compact size, and RoHS compliance. However, it also comes with disadvantages, including high power consumption, contact wear, fragile nature, and cost.

Based on the pros and cons, the decision to purchase the HG4C-1004 Mercury Wetted Reed Relay depends on the specific requirements of the application, including environmental conditions, the number of contacts required, and the available budget. If the application demands fast switching speeds, a wide operating temperature range, and high contact ratings, this relay may be a suitable choice despite its higher cost and maintenance requirements.

For applications where fast switching speeds, a wide operating temperature range, and high contact ratings are essential, the CP Clare HG4C-1004 Mercury Wetted Reed Relay 4PDT Socket is a solid choice. However, if power consumption, cost, and maintenance requirements are significant concerns, other types of relays, such as solid-state relays or SPST relays, may be more suitable alternatives.

Details:

Coil measures 415. Must operate in upright position. Will close at 16vdc or less and will open 10vdc more. Grid in photos is 0.5 mil socket mounted with mating connector.

4 pole, double throw, mercury wetted reed relay. The coil and all contacts are tested working fine. I think this is nos.

specifications genpurrelays:

• brand: C.p. Clare
• mpn: Hg4c-1004
• mounting style: Plug-in/on, Screw
• maximum amperage: 2 Amp
• current rating: Less Than 1 A
• suitable for: Signal And Data Routing
• current type: Ac/dc
• type: Signal/data Relay With Mil Spec Socket Mount
• unit type: Unit
• contact configuration: 4 Pole Double Throw
• item height: 5 In
• coil voltage: 21-30 V
• contact material: Mercury Wetted Reed
• number of pins: 14-pin
• features: Remote Monitoring
• application: Electronics, Instruments
• item width: 1.7 Diam
• country of origin: United States

seller genpurrelays:

• # reviews: 103
• rating: 100.0%
• city: san francisco, california

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general genpurrelays:

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

offer genpurrelays:

• options: ship-to-home
• sold #: 12
• best offers: true
• started: february 3, 2026
• availability: in stock
• quantity: 1