KAQY602S
600V 100mA triac output solid state relay with 2500V isolation, zero-cross switching, SOP-4 package for AC load control.
Product Overview
Description
The KAQY602S is a triac output solid state relay designed for AC load switching with zero-cross detection.
Capable of switching AC loads up to 600V and 100mA, suitable for heater control, lighting, and small motor applications.
Zero-cross switching minimizes EMI and extends the life of resistive loads.
Product Series
KAQY
Primary Application
Heater control
Key Features
- 600V AC switching
- 100mA load current
- Zero-cross switching
- 2500V isolation
- Low EMI emission
- Long load life
- RoHS compliant
Specifications
| Output Type | Triac |
|---|---|
| Load Voltage | 600V AC |
| Load Current | 100mA continuous |
| Isolation Voltage | 2500Vrms |
| On-Voltage | 1.5V typical |
| Zero-Cross | Yes |
| Surge Current | 1.2A (1 cycle) |
| Package | SOP-4 |
| Operating Temperature | -40°C to +85°C |
Applications
Heater control
Industrial automation and control
Incandescent lighting
Electronic system design
Small AC motors
Motor drive and control systems
Solenoid valves
Electronic system design
Home appliances
Electronic system design
FAE Expert Insights
"For high-current DC switching, the KAQY602S is impressive. The 2A continuous current capability handles substantial loads, and the 60V rating covers most 12V and 24V industrial applications. I've used this in battery management systems and power distribution modules. The key consideration is thermal management - at 2A with 0.5Ω on-resistance, you're dissipating 2W, which requires proper heat sinking. Design tip: use thermal vias to inner copper layers and ensure at least 200mm² of copper area. The optical isolation provides excellent noise immunity in power switching applications."
Zero-cross AC SSR for low-current resistive loads
— Senior FAE Team, BeiLuo
Frequently Asked Questions
What is zero-cross switching and why is it important?
Zero-cross switching turns the triac on only when AC voltage crosses zero. This minimizes EMI/RFI generation, reduces inrush current, and extends load life. It's essential for residential/commercial applications where EMI must be minimized. Use non-zero-cross types only for phase-control applications like dimming.
Zero-cross minimizes EMI - use for most AC loads.
Can KAQY602S drive inductive loads?
KAQY602S can drive small inductive loads, but proper snubber protection is required. Use an RC snubber (typically 100Ω + 0.1μF) across the load to protect against voltage transients. For heavy inductive loads, consider using a larger external triac triggered by the SSR.
Use snubber circuits for inductive loads.
What is the difference between zero-cross and random-fire SSRs?
Zero-cross SSRs switch only at AC zero crossings, minimizing EMI. Random-fire SSRs switch immediately when triggered, allowing phase control for dimming and speed control. KAQY602S is zero-cross type. Use random-fire only when phase control is needed.
Zero-cross for standard switching, random-fire for phase control.
What is the dv/dt rating of KAQY602S?
KAQY602S has a typical dv/dt rating of 1000V/μs. This ensures the triac does not false-trigger due to rapid voltage transients. For applications with high dv/dt, ensure the rating is not exceeded or use additional snubber circuits.
1000V/μs dv/dt rating for noise immunity.
Can multiple KAQY602S be used in parallel for higher current?
Parallel operation of triac SSRs is not recommended due to current sharing issues. For higher current requirements, use a single higher-rated SSR or use the SSR to trigger a larger external triac. This ensures proper current distribution and reliable operation.
Don't parallel - use higher rated SSR or external triac.