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Single Phase Relay Systems
-- Steady & Reliable Manufacturer --
Single Phase Relay Systems
Compact switching solutions for residential, commercial, and light industrial applications
Introduction
Single phase relay systems provide switching and control solutions for single-phase AC and DC circuits commonly found in residential, commercial, and light industrial applications. These relays are used in applications ranging from lighting control and HVAC equipment to charging stations and household appliances. Huajin Technology designs single phase relay systems with magnetic latching technology, enabling zero power consumption in the holding state while maintaining reliable contact performance over extended service life.
Specifications
| Parameter | Specification |
|---|---|
| Contact Current Rating | 5A – 60A |
| Coil Voltage Options | 3V, 5V, 12V, 24V, 48V DC |
| Contact Form | 1A, 1B, 1C, 2A |
| Initial Contact Resistance | ≤ 30 mΩ |
| Electrical Life (Resistive Load) | ≥ 10,000 operations |
| Mechanical Life | ≥ 100,000 operations |
| Dielectric Strength (Coil to Contact) | ≥ 4000 VAC / 1 minute |
| Surge Withstand Voltage | ≥ 5000 V |
| Operating Temperature | -40°C to +85°C |
| Safety Approvals | CCC, TUV, CE |
Applications
- Residential smart meters and energy management
- AC control circuits for HVAC equipment
- Lighting control panels and dimming systems
- Home automation and building control
- Power supply units and battery management
Advantages
- Magnetic latching reduces standby power to near zero
- Compact footprint saves PCB space
- Through-hole and surface-mount configurations
- High surge withstand protects against transients
- Sealed construction for dusty environments
Frequently Asked Questions
What is the difference between 1A and 1C contact configurations?
1A configuration provides a single normally open contact that closes when the coil is energized. 1C configuration offers a changeover contact with both normally open and normally closed terminals, providing greater circuit design flexibility. 1C is commonly used in applications requiring fail-safe operation or circuit selection between two paths.
Can single phase relays be used in DC applications?
Yes. Our single phase relay systems are suitable for both AC and DC load switching. For DC loads, the contact material and gap are optimized to minimize arc duration and contact erosion. DC current ratings may differ from AC ratings, with de-rating guidelines provided in the technical datasheet for specific load types.
How long does the relay maintain its state without power?
The magnetic latching mechanism holds the contact position indefinitely without electrical power. The permanent magnet provides a holding force that maintains the armature in either the set or reset position. No battery or backup power is required to preserve the relay state during equipment power-down or maintenance periods.
What is the recommended coil pulse duration?
The recommended pulse duration ranges from 30ms to 100ms depending on the coil voltage and model. A pulse of sufficient duration ensures complete armature travel and positive contact seating. Extended pulse durations beyond 500ms may cause coil heating and are not recommended for normal operation.
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Established in May 2021
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Annual exports account for about 30%
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The company occupies an area of 8,000 square meters.
Huajin Technology Jiaxing Co., Ltd. was established in May 2021 and is located at 707 Yanyu Road, Yucheng Town, Haiyan County, Jiaxing City, Zhejiang Province. It is a high-tech enterprise specializing in the research and development, production, and sales of relays.The registered capital of the company is 10 million yuan, covering an area of 8000 square meters, with more than 120 employees. The annual production capacity of magnetic latching relays is over 10 million, of which exports account for about 30%. The company has obtained ISO9001-2015 quality management system certification, and its relays have passed CCC certification, State Grid certification, TUV certification, etc. It also holds multiple technical patents. Our main products include motor relays, single-phase, two-phase, and three-phase magnetic latching relays, which have a wide variety of types and can meet various customized solutions for customers.
