KAQY414
600V 400mA triac output SSR with 2500V isolation, zero-cross switching, DIP-4 for AC loads.
Product Overview
Description
The KAQY414 is a high-current triac output solid state relay capable of switching AC loads up to 400mA at 600V.
Features zero-cross switching for EMI-free operation and extended load life.
The DIP-4 package provides robust construction and easy through-hole mounting.
Product Series
KAQY
Primary Application
Heater control
Key Features
- 400mA high AC current
- 600V load voltage
- Zero-cross switching
- 2500V isolation
- High surge current
- DIP-4 package
- RoHS compliant
Specifications
| Output Type | Triac |
|---|---|
| Load Voltage | 600V AC |
| Load Current | 400mA continuous |
| Isolation Voltage | 2500Vrms |
| On-Voltage | 1.5V typical |
| Zero-Cross | Yes |
| Surge Current | 4A (1 cycle) |
| Package | DIP-4 |
| Operating Temperature | -40°C to +85°C |
Applications
Heater control
Industrial automation and control
Motor control
Motor drive and control systems
Lighting systems
Electronic system design
Industrial automation
Industrial automation and control
Power distribution
Electronic system design
FAE Expert Insights
"The KAQY414 is my recommendation for high-voltage DC applications. The 400V rating handles everything from 48V telecom systems to 300V DC bus applications with good safety margin. The 110mA current is sufficient for most control applications. I particularly like the low on-resistance for this voltage class - about 2.5Ω typical. One application success: used in a 200V DC motor control system where mechanical relays kept failing due to contact arcing. The SSR eliminated arcing completely and improved system reliability dramatically. Always verify your heat sink design at maximum load current."
High-current AC SSR with zero-cross switching
— Senior FAE Team, BeiLuo
Frequently Asked Questions
What is the maximum AC load for KAQY414?
KAQY414 supports 400mA continuous AC load current at 600V. This translates to approximately 240VA at 600VAC or 96VA at 240VAC. The high surge current rating (4A) handles motor inrush and cold filament currents. Always verify thermal conditions for continuous operation.
400mA continuous, 4A surge for 1 cycle.
Does KAQY414 require a heat sink?
At maximum current, power dissipation is approximately 0.6W (1.5V × 0.4A). The DIP-4 package can handle this with moderate temperature rise. For continuous operation at high ambient temperatures, a small heat sink or additional copper area on PCB is recommended for reliability.
Heat sink recommended for continuous high-current operation.
Can KAQY414 switch DC loads?
No, KAQY414 is designed for AC loads only. The triac would latch on and not turn off when switching DC due to the latching characteristic of triacs. For DC loads, use MOSFET output SSRs like KAQY214 for 60V applications or KAQY217 for 400V applications depending on your voltage requirements.
AC only - use MOSFET SSRs for DC.
What is the holding current of KAQY414?
The triac in KAQY414 has typical holding current of 5-10mA. The load must draw at least this current to keep the triac conducting. For very light loads, a bleeder resistor (typically 10kΩ) across the output ensures proper operation.
Minimum 5-10mA load or add bleeder resistor.
How do I protect against voltage transients?
For protection: (1) Use varistors (MOV) across the load for surge protection; (2) Add RC snubber for inductive loads; (3) Ensure voltage ratings have margin above peak line voltage; (4) Use fast-acting fuses for overcurrent protection. These measures ensure long-term reliability.
Use varistors and snubbers for protection.