NINGBO KEYONG JINGSHENG ELECTRICAL APPLIANCE CO., LTD. supplies the KQF49 (49F) Subminiature PCB Power Relay 5A, featuring compact dimensions, 5A switching capability, 3kV dielectric strength, Class F insulation, and low 0.2W coil power consumption for stable and energy-efficient performance. Designed for PCB mounting and compliant with IEC 61131-2 and RoHS standards, it is widely used in household appliances, automation systems, telecommunication equipment, instruments, and remote control devices requiring reliable electrical control and long-term operating stability.
Stable Switching Reduces Equipment Failure Risk
In practical applications, relay failure often comes from unstable contact performance under continuous switching conditions. KEYONG uses high-quality contact materials and precise assembly processes to improve switching consistency and reduce arcing during operation.
This helps customers:
●Reduce equipment downtime
●Improve product reliability
●Lower after-sales maintenance costs
●Extend overall service life of electronic systems
For manufacturers producing household appliances or smart control equipment, relay reliability is especially important for long-term market performance.
Compact Size Helps Save PCB Space
Modern electronic products continue moving toward compact and integrated designs. Oversized components increase PCB layout difficulty and limit internal structure optimization.
The Subminiature PCB Power Relay 5A features a compact low-profile structure suitable for high-density PCB mounting applications. It allows engineers to optimize board layout while maintaining stable electrical control performance.
This makes it suitable for:
●Smart switches
●Control modules
●Security products
●Communication equipment
●Intelligent home appliances
●Compact automation systems
Low Power Consumption Supports Energy-Efficient Design
Heat generation and excessive power consumption can affect the stability of sensitive electronic circuits.
The optimized coil structure of the KEYONG 5A relay helps reduce energy consumption during operation while improving thermal stability inside the equipment. This is especially valuable for products requiring long operating hours or continuous standby conditions.
Yes. KEYONG provides OEM and customized relay solutions according to different customer requirements, including:
●Coil voltage customization
●Terminal configuration adjustment
●Relay socket matching
●Wiring harness support
●Customized marking and packaging
This helps customers improve product compatibility and supply chain efficiency.
| Contact arrangment | 1A |
| Contact resistance | ≤100mΩ(1A6VDC) ≤50mΩ(1A 6VDC) |
| Contact material | AgSnO₂,AgNi |
| Contact rating(Res.load) | 5A 250VAC/30VDC |
| Max switching voltage | 250VAC/125VDC(at0.3A) |
| Max switching current | 5A |
| Max switching power | 1250VA/150W |
| Minimum load | 5VDC 10mA 5VDC 1mA |
| Mechanical endurance | 2×10⁷ops |
| Electrical endurance |
1×10⁵ops(AgNi,3A 250VAC/30VDC,85°C,1s 9s) 5×10⁴ps(AgNi,5A 250VAC/30VDC,1s 9s) |
| Rated Voltage(VDC) | 5 | 6 | 9 | 12 | 18 | 24 |
| Action Voltage(VDC) | ≤3.50 | ≤4.20 | ≤6.30 | ≤8.40 | ≤12.6 | ≤16.8 |
| Release Voltage(VDC) | ≥0.25 | ≥0.30 | ≥0.45 | ≥0.60 | ≥0.90 | ≥1.20 |
| Maximum Voltage(VDC) | 6.0 | 7.2 | 10.8 | 14.4 | 21.6 | 28.8 |
| Coil Resistance(2) | 208x(1±10%) | 300x(1±10%) | 675x(1±10%) | 1200x(1±10%) | 2700x(1±15%) | 3200x(1±15%) |
| Insulation level | B/F | |
| Insulation resistance | 100MΩ(500VDC) | |
| Dielectrc strength(Leakage current 1mA) | Between coil and contacts | 3000VAC 1min |
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Between open contacts | 1000VAC 1min |
| Operate time(at nominal voltage) | ≤10ms | |
| Release time(without diode)(at nominal voltage) | ≤5ms | |
| Humidity | 5%RH~85%RH | |
| Ambient temperature | -40°C~85℃ | |
| Shock resistance | Functional | 98m/s² |
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Destructive | 980m/s² |
| Vibration resistance(Double amplitude) | 10Hz~55Hz 1.5mm | |
| Weight | Approx 3g | |
| Construction | Sealed | |
| Package Type | PCB termination | |
| Surge voltage (between coil and contacts) | 6kV(1.2/50us) | |
The KEYONG Subminiature PCB Power Relay 5A is widely used in various industries and electrical systems, including:
●Household appliances
●Smart home systems
●Security and surveillance equipment
●Communication devices
●Industrial automation control
●Smart power modules
●PCB control boards
●Office automation equipment
●Intelligent electronic products
As a professional relay supplier, KEYONG works with customers across North America, Europe, Southeast Asia, and the Middle East to provide stable relay solutions for different market requirements.
1.Why choose a subminiature PCB relay instead of a standard relay?
Subminiature PCB relays save installation space and are more suitable for compact electronic devices and intelligent control systems requiring high-density PCB layouts.
2.Is the 5A relay suitable for household appliances?
Yes. It is widely used in household appliances, smart switches, and control systems requiring stable low-to-medium power switching performance.
3.How does KEYONG ensure consistent product quality?
KEYONG uses automated production lines, precision inspection equipment, and strict ISO9001 quality management procedures to maintain stable product consistency.
4.Can customized coil voltages be supported?
Yes. Different coil voltage options and customized specifications are available according to application requirements.
5.Which markets does KEYONG export to?
KEYONG exports relay products to North America, South America, Western Europe, Southeast Asia, and the Middle East, serving global OEM and industrial customers.
6.Is the Relay Suitable for Continuous Working Conditions?
Yes. The relay is designed for stable operation in continuous switching environments commonly found in smart appliances, industrial control systems, and communication equipment.
Correct load matching and proper PCB layout can further improve relay lifespan and operating stability.
KEYONG focuses on long-term cooperation through reliable quality, stable production capability, and professional technical support. Whether you are sourcing relays for household appliances, industrial automation, smart control systems, or communication equipment, the KEYONG Subminiature PCB Power Relay 5A provides a dependable solution for modern electronic applications.
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350 Renmin North Road, Hengxi Town, Yinzhou District, Ningbo City, Zhejiang Province, China
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