The W20TP relay represents a notable progression in modern electrical control technology, serving as an advanced electrical component that integrates high-power switching capabilities, environmental durability, and extended longevity. This product has been carefully engineered and subjected to rigorous quality control. Advanced technology has been employed in the contact materials, insulation systems and mechanical constructions to deliver reliable electrical control solutions for a variety of demanding applications.
The W20TP adopts a modular design philosophy, maximizing electrical performance while maintaining compact dimensions. The device attains several technological advancements in arc suppression, thermal management, and contact dependability, guaranteeing consistent performance under frequent switching and high-load situations.
Superior Load Capacity: Rated load 25A/250VAC/30VDC, maximum switching current up to 32A, meeting most industrial application requirements
Optimized Contact System: Initial contact resistance ≤100mΩ, featuring a specialized contact structure design to effectively reduce energy loss
Rapid Response Characteristics: Operating time ≤20ms, release time ≤10ms, ensuring swift control system response
Superior Insulation Performance: Insulation resistance up to 1000MΩ (500VDC), dielectric strength between coil and contacts at 4500VAC/1min
Dual Protection Design: Plastic-sealed type offers IP67 protection rating; solder-free type meets economical requirements for clean environments
Extreme Temperature Tolerance: Operating range -40°C to +85°C, storage range -55°C to +105°C
Chemical Corrosion Protection: Special sealing materials resist corrosion from gases like H₂S, SO₂, and NO₂
Mechanical Environmental Endurance: Vibration resistance 10Hz~55Hz, 1.5mm double amplitude; shock resistance 980m/s² for sustained reliability
Extended mechanical life: Up to 2 million mechanical operations, meeting high-frequency usage demands
Stable electrical life: Maintains superior performance under 25A/250VAC resistive load
Advanced contact material: AgSnO₂ (Silver Tin Oxide) contacts exhibit excellent arc erosion resistance and solderability
W20TP relays are widely used in home appliances such as air conditioners, washing machines, microwave ovens, and water heaters. They manage motor control, heating circuit activation, and power switching functions. Their significant load capacity and quick response characteristics ensure consistent and safe functioning of domestic appliances.
Applicable to photovoltaic inverters, energy storage systems, and electric vehicle charging stations, facilitating DC/AC conversion control, battery charge/discharge management, and energy despatch.Its high-temperature resistance and corrosion-proof design meet the stringent demands of outdoor and industrial environments.
Within industrial control equipment, power management systems, motor drives, and automated machinery, the W20TP handles power switching, load control, and signal conversion. Uninterrupted, dependable operation of industrial systems is guaranteed due to its superior mechanical durability and resistance to vibration and shock.
A critical component for power backup, signal isolation and device protection, it is used in communication base stations, elevator controls, security systems and medical equipment. Its compact design and stable performance meet the demands of high-density installations. Long-term operation is something they are also able to meet.
Clean Indoor Environments: Suitable for offices, laboratories, residences and other pollution-free settings. The solder-free type is recommended for cost-effectiveness.
Industrial Polluted Environments: Factory workshops, chemical plants, coastal areas, and other corrosive gas environments. Plastic-sealed type recommended.
High-Humidity Environments: Plastic-sealed varieties are necessary for kitchens, bathrooms, outdoor equipment and other moist environments, where they are often used in places such as under sinks and in cupboards.
High Temperature Fluctuation Environments: Plastic-sealed versions are recommended for outdoor devices and vehicle-mounted equipment, as well as for use in environments where there are significant temperature fluctuations.
Resistive Loads: Heaters, incandescent lamps, etc. – Can be used at rated values.
Inductive Loads: Motors, transformers, etc. – derating is necessary, with a reduction of 30% being advised.
Capacitive Loads: Power filters, compensating capacitors, and similar components. – Specialized relays required.
Low-Level Loads: Minimal load specifications must be met when it comes to signal circuits, sensor circuits and the like.
Resistive Loads:The rated levels of heaters, incandescent lamps and other appliances can be used directly.
Inductive Loads: It is recommended that motors, transformers and analogous devices be subject to a 30% derating.
Capacitive Loads: Specialised relays are required for power filters, compensating capacitors and similar components.
Low-Level Loads: Signal circuits, sensor circuits, etc. must fulfil the minimum load specifications.
PCB Layout Recommendations: Recommended pin spacing 30.1mm × 15.7mm, mounting hole spacing 27.6mm × 13.8mm
Mounting Hole Specifications: 4 × Ø1.8mm, recommended to secure with M1.6 screws
Pin Dimensions: 2 × Ø1.35mm × 0.5mm, 2 × Ø0.8mm × 1.5mm
Safety Clearance: Maintain a minimum 5mm clearance between relay and surrounding components
Electrical Connection Specifications
Coil Connection: Observe polarity requirements; ensure operation within specified voltage range
Contact Connection: Main circuit conductor cross-sectional area must meet current requirements; recommend using 1.5mm² or larger wire
PCB Routing: Maintain sufficient spacing between high-voltage lines and low-voltage control lines; recommend ≥8mm
Heat Dissipation Considerations: For high-current applications, use ventilation holes or copper foil heat sinks
Pre-Installation Notes
Visual Inspection: Confirm no physical damage such as cracks or deformation
Parameter Verification: Verify coil voltage and contact rating match application requirements
Storage Conditions: Store in original packaging, avoiding high-temperature/high-humidity environments
Usage Notes
Voltage Stability: Ensure stable coil operating voltage, avoiding overvoltage or undervoltage.
Load Matching: Comply with the designated load capacity and implement derating as required for inductive loads.
Environmental Protection: Ensure that water droplets, oil contamination, and dust do not come into direct contact with the relay.
Thermal Management: Guarantee sufficient heat dissipation in high-current applications; employ forced cooling if required.
Safety Precautions
Electrical Isolation: Disconnect all power connections before maintenance.
Arc Protection: Do not use non-explosion-proof models in flammable or explosive environments
Grounding Requirements: Ensure equipment is properly grounded to prevent static electricity buildup
Quality Assurance and Certification
Certifications and Standards Compliance
Quality Management: The production process is certified by the ISO 9001 Quality Management System.
Safety Certification: Insulation system certified to UL Class F
Quality Management: Production process accredited by the ISO 9001 Quality Management System.
The W20TP relay, featuring a 25A high switching capacity, rapid response attributes, and remarkable environmental versatility, is an optimal control element for home appliances, renewable energy applications, industrial automation, and several other sectors.
Featuring AgSnO₂ contact material and a dual-structure design incorporating sealing and solder resist, this product ensures stability and extended lifespan under complex operating conditions. Thanks to its compact PCB mounting dimensions and flexible coil voltage options, it can be seamlessly integrated into various high-density electronic systems.
We are convinced that the W20TP relay will provide long-term reliability for your equipment and projects because to its consistent performance, extensive application compatibility, and sturdy design. If you need help with product selection, technical information, or sample requests, please contact our technical support staff at any time.
