KAQY214
60V 400mA MOSFET output solid state relay with 2500V isolation, low on-resistance 0.5Ω, SOP-4 package for DC switching.
Product Overview
Description
The KAQY214 is a high-performance MOSFET output solid state relay featuring 60V load voltage and 400mA continuous load current.
With ultra-low on-resistance of 0.5Ω typical, it minimizes power dissipation and heat generation during operation.
The SOP-4 surface-mount package is ideal for automated assembly and space-constrained applications.
Product Series
KAQY
Primary Application
Battery management systems
Key Features
- 400mA high current capability
- Ultra-low on-resistance 0.5Ω
- 2500V isolation voltage
- Fast switching <1ms
- No moving parts - unlimited life
- Silent operation
- RoHS compliant
Specifications
| Output Type | MOSFET |
|---|---|
| Load Voltage | 60V DC |
| Load Current | 400mA continuous |
| Isolation Voltage | 2500Vrms |
| On-Resistance | 0.5Ω typical |
| Turn-on Time | 0.5ms typical |
| Turn-off Time | 0.1ms typical |
| Package | SOP-4 |
| Operating Temperature | -40°C to +85°C |
Applications
Battery management systems
Battery and charging management
DC motor control
Motor drive and control systems
LED lighting control
Industrial automation and control
Industrial automation
Industrial automation and control
Test equipment
Electronic system design
Medical devices
Medical electronics
FAE Expert Insights
"The KAQY214 is a solid choice for DC switching applications requiring long life and silent operation. With 400V load voltage and 120mA current capability, it handles most small DC loads comfortably. I've specified this in test equipment and medical devices where mechanical relay noise was unacceptable. The MOSFET output provides low on-resistance (about 1.5Ω), minimizing voltage drop and heat generation. One practical note: unlike mechanical relays, SSRs have leakage current when off (about 1μA for this part) - important to consider for very sensitive loads. For inductive DC loads, always use a freewheeling diode."
High-current DC SSR with ultra-low on-resistance for reliable switching
— Senior FAE Team, BeiLuo
Frequently Asked Questions
What is the maximum load current for KAQY214?
The KAQY214 supports 400mA continuous load current at 25°C ambient. Current derating may be required at higher temperatures. For reliable operation, ensure proper thermal management and consider using a heat sink for continuous high-current operation.
400mA continuous, derate at elevated temperatures.
How do I calculate power dissipation in KAQY214?
Power dissipation is calculated as P = I² × Rds(on). For 400mA load current with 0.5Ω on-resistance: P = 0.4² × 0.5 = 0.08W. Ensure the package can dissipate this power at your operating temperature. Add safety margin for reliable operation.
Calculate P = I² × Rds(on) for thermal design.
Can KAQY214 switch AC loads?
No, KAQY214 is designed for DC loads only. The MOSFET output includes a body diode that would conduct during negative AC half-cycles. For AC switching, use triac output SSRs like KAQY6x series or add an external bridge rectifier for DC conversion.
Use triac SSRs for AC, MOSFET SSRs for DC only.
What is the typical switching speed of KAQY214?
KAQY214 has typical turn-on time of 0.5ms and turn-off time of 0.1ms. This fast switching speed makes it suitable for PWM applications and high-frequency switching. The fast response also minimizes switching losses compared to mechanical relays.
Fast switching suitable for PWM applications.
Does KAQY214 require a heat sink?
At maximum current (400mA), power dissipation is approximately 0.08W, which the SOP-4 package can typically handle without a heat sink at room temperature. However, for high ambient temperatures or continuous operation, a small heat sink or copper pad on PCB is recommended for reliability.
Heat sink recommended for high temp or continuous operation.