PCB Relay 10A 4000V – 0.55W General Purpose

Quick Detail:

1. through-hole relay,PC board relay,sealed relay
2. Switching loads on a printed circuit board
3. Signal switching
4. Isolation
5. Automation & control
6. Safety & protection

Description:

Small PCB Relay – High Isolation, Fast Release, and Low Power for Demanding Applications

In modern electronic and industrial control systems, the printed circuit board (PCB) relay remains an essential component for safely switching loads while maintaining galvanic isolation between control and power circuits. The Small PCB Relay series, offered in 1H/1Z (SPST‑NO/SPDT) and 2H/2Z (DPST‑NO/DPDT) contact configurations, is engineered to deliver robust performance in a compact, board‑mountable package. With an impressive dielectric strength of 4000VAC between coil and contacts, a fast release time of just 5ms, low coil power consumption of 0.55W, and a wide DC coil voltage range from 3V to 60V, this relay series is an ideal choice for applications requiring high safety margins, energy efficiency, and reliable switching – including household appliances, HVAC systems, industrial automation, smart meters, and power supplies.

Versatile Contact Configurations for Different Load Requirements

The relay is available in four contact arrangements, allowing designers to select the optimal configuration for their specific circuit needs.

· 1H Configuration (SPST‑NO – Single Pole Single Throw, Normally Open):
Features one normally open contact, rated at 10A at 240V AC or 24V DC. Ideal for simple on/off control of loads such as heaters, fans, compressors, solenoids, and lighting circuits.
· 1Z Configuration (SPDT – Single Pole Double Throw):
Provides one changeover contact (common, normally open, normally closed) with the same 10A at 240V AC / 24VDC rating. The SPDT version offers greater flexibility, allowing the relay to switch between two loads or provide both a “make” and “break” circuit.
· 2H Configuration (DPST‑NO – Double Pole Single Throw, Normally Open):
Features two independent normally open contacts, each rated at 10A at 240V AC or 30V DC. Perfect for simultaneously switching two separate circuits, such as dual heating elements or line and neutral switching.
· 2Z Configuration (DPDT – Double Pole Double Throw):
Provides two independent changeover contacts, each rated at 10A at 240V AC or 30V DC. The 2Z version is ideal for more complex control tasks, such as reversing motor direction or switching between two power sources.

All configurations exhibit a low contact resistance of ≤50mΩ (measured at 1A, 6V DC), ensuring minimal power loss and heat generation. The contact material is robust enough to handle the TV‑5 rating (typical for switching tungsten filament lamps or other inrush‑heavy loads), making the relay suitable for applications with high inrush currents, such as incandescent lighting or capacitive power supplies.

Exceptional Dielectric Strength for High Safety Margins

Safety and isolation are critical in any electrical installation, and this relay excels with outstanding dielectric specifications. It offers a very high insulation resistance of 1000MΩ, ensuring excellent isolation between coil and contacts as well as between independent contact sets.

The dielectric strength ratings are particularly impressive:

· Between Coil and Contacts (BCC): Withstands 4000V AC for 1 minute. This high isolation voltage is a key differentiator, making the relay suitable for applications requiring reinforced insulation, such as household appliances that must meet IEC 60335‑1 (where basic insulation is often 1500V, reinforced 3000V). The 4000V rating provides a substantial safety margin.
· Between Open Contacts (BOC): Withstands 1000V AC for 1 minute, ensuring that contacts can safely interrupt the circuit without breakdown or excessive arcing.

These ratings allow the relay to be used in systems connected directly to the AC mains, providing peace of mind for designers concerned with creepage, clearance, and user safety.

Ultra‑Fast Release Time for Enhanced Protection

In time‑critical or safety‑related applications, the speed at which a relay opens its contacts can be as important as its current rating. This relay delivers an operate time of 15ms and an exceptionally fast release time of only 5ms. The asymmetrical timing – with a release three times faster than operate – is a deliberate design feature. The sub‑5ms release ensures that power is removed from the load almost instantaneously when the coil is de‑energized. This is particularly valuable in:

· Emergency stop circuits
· Overcurrent or overtemperature protection loops
· Motor braking systems
· Capacitor discharge paths
· Any application where a rapid disconnection can prevent equipment damage or personal injury

The fast release also reduces contact arcing, contributing to longer electrical life when switching AC loads.

Low Coil Power Consumption for Energy‑Efficient Designs

The relay is designed with energy efficiency as a priority. Its nominal coil power is only 0.55W across the entire DC voltage range. This low power draw offers several benefits:

· Reduces heat generation on densely populated PCBs
· Minimises the burden on control circuits (microcontrollers, PLCs, or drivers)
· Enables use in battery‑powered or energy‑harvesting applications
· Simplifies thermal management in enclosed or fan‑less equipment

For battery‑operated devices such as smart sensors, wireless switches, or portable test equipment, every milliwatt saved extends operating life. The 0.55W coil makes this relay an attractive alternative to more power‑hungry alternatives.

Wide DC Coil Voltage Range for Global Compatibility

The relay series offers an extensive selection of DC coil voltages, covering the most common logic and control voltages used worldwide. Available nominal voltages include 3V, 5V, 6V, 9V, 12V, 18V, 24V, 48V, and 60V DC. Each coil version is precisely specified with pull‑in and release voltages (e.g., 2.25V/0.3V for the 3V coil) and coil resistance tolerance of ±10%. Coil resistance values range from 20Ω (3V) to 7000Ω (60V). The inclusion of a 60V coil is notable, as it allows the relay to be used in 48V nominal systems (where maximum voltage can reach 60V) or in industrial control circuits with higher DC supplies.

This wide voltage selection ensures that a single relay family can serve multiple product lines, reducing inventory complexity. Designers can drive the coil directly from a microcontroller pin (for 3V or 5V logic) or from a dedicated power supply without needing external dropping resistors.

Compact PCB‑Mount Form Factor for High‑Density Assembly

Designed exclusively for PCB termination, the relay allows direct soldering onto printed circuit boards. Its compact footprint and low profile enable high component density, which is essential for modern miniaturised electronics. The absence of a socket reduces assembly height, material cost, and potential points of failure. This makes the relay particularly suitable for:

· High‑volume consumer electronics
· Space‑constrained industrial control modules
· Integrated power supply boards
· Smart home devices (e.g., smart plugs, dimmers, energy monitors)

Wide Range of Applications

The combination of high isolation voltage, fast release, low coil power, and flexible contact configurations makes this PCB relay ideal for numerous applications:

· Household Appliances: Refrigerators, air conditioners, washing machines, microwave ovens, and water heaters – meeting rigorous safety standards for reinforced insulation.
· Industrial Automation: PLC output modules, timer relays, contactor interfaces, and machine safety circuits.
· HVAC Systems: Compressor control, fan speed switching, zone valve actuation, and electric heater control.
· Smart Meters and Energy Management: Switching load circuits, connecting/disconnecting renewable energy sources, and controlling demand‑response loads.
· Power Supplies and Battery Systems: Output switching, battery charge/discharge path control, and protection circuits.
· Lighting Control: Switching tungsten lamps (TV‑5 rated), LED drivers, and fluorescent ballasts.

Conclusion: A High‑Performance PCB Relay for Safety‑Critical and Power‑Sensitive Designs

The Small PCB Relay series (1H/1Z/2H/2Z) offers a compelling combination of high dielectric strength (4000V AC between coil and contacts), ultra‑fast release time (5ms), low coil power (0.55W), and a wide DC coil voltage range (3‑60V). With contact ratings of 10A at 240V AC and the ability to handle TV‑5 loads, it is well‑suited for a variety of resistive, inductive, and inrush‑intensive applications. The compact PCB‑mount form factor makes it easy to integrate into modern electronic assemblies. Whether you are designing a safety‑compliant household appliance, an energy‑efficient industrial controller, or a space‑constrained smart device, this relay provides the reliability, performance, and safety margins you need. Choose this relay for your next project and experience the difference that thoughtful engineering makes.

Applications:

1.home appliances (washing machines, air conditioners),
2.office equipment (printers, copiers),
3.industrial PLCs,
4.battery management systems,
5.automotive modules.

Specifications:

Competitive Advantage:

Advantages of Wenzhou DAQUAN Electric Co., Ltd

1. Innovation Leadership

With 258 patents and 27 years of industry experience, we lead in R&D of industrial control devices like relays and timers, ensuring cutting-edge product performance.

2. Global Certifications

Our products hold CE, ROHS, IEC, TUV certifications plus ISO9001, meeting strict international standards for seamless global market access.

3. Scale Supply Stability

Backed by a 7,800㎡ factory, 499-strong team, and 70M RMB annual output, we guarantee efficient production and timely delivery for bulk orders.