i-Autoc KSHA Series Single-Phase AC Output Solid State Relays
Product Datasheet
Product Description
The KSHA series are single-phase solid-state relays featuring an internal SCR structure and PCB mounting. They are widely used in various industrial applications and are suitable for resistive, inductive, and capacitive loads. The relays support load voltages of 240VAC, 480VAC, and 600VAC, with an output current of 25A.
Key Features:
- Zero-crossing or random turn-on switching options
- Load current: 25A @ 24~660VAC
- SCR output
- DC input
- Photocoupler isolation: ≥ 4000VACrms
- Built-in RC protection circuit
- RoHS compliant
Product Selection
The KSHA series model naming convention is as follows:
| Series | Load Voltage | Control Type | Load Current | Trigger Type | Protection | Customer Code |
|---|---|---|---|---|---|---|
| KSHA | 240: 240VAC 480: 480VAC 600: 600VAC |
D: DC Input | 25: 25Amp | (Blank): Zero-crossing R: Random |
(Blank): None T: TVS Protection(1) |
(XXX) |
Example Model: KSHA480D25R-T
(1) 600VAC models do not include TVS protection.
Technical Parameters
Input Parameters (Ta=25°C)
| Parameter | Value |
|---|---|
| Control Voltage Range | 4~32VDC |
| Must-ON Voltage | 4VDC |
| Must-OFF Voltage | 1VDC |
| Max Input Current | 25mA @ 32VDC (Random) 18mA @ 32VDC (Zero-crossing) |
Output Parameters (Ta=25°C)
| Parameter | Value |
|---|---|
| Load Voltage Range | 24~280VAC (for 240VAC models) 24~530VAC (for 480VAC models) 24~660VAC (for 600VAC models) |
| Max ON-State Voltage Drop | 1.5Vrms (@ rated current) |
| Max Surge Current (@10ms) | 250A |
| Max Transient Voltage | 600Vpk (for 240VAC models) 1200Vpk (for 480VAC/600VAC models) |
| Max OFF-State Leakage Current (@ rated voltage) | 5mA |
| Min Rate of Voltage Rise (dv/dt) | 500 V/µs |
Available Models:
- KSHA240D25, KSHA240D25-T
- KSHA240D25R, KSHA240D25R-T
- KSHA480D25, KSHA480D25-T
- KSHA480D25R, KSHA480D25R-T
- KSHA600D25, KSHA600D25R
Other Parameters (Ta=25°C)
| Parameter | Value |
|---|---|
| Dielectric Strength (50Hz/60Hz) | Input/Output: 4000VACrms Input/Baseplate: 2500VACrms |
| Power Factor | >0.5 |
| Operating Temperature Range | -30°C ~ +80°C |
| Storage Temperature Range | -30°C ~ +100°C |
| Weight (Typical) | 65g |
Application Scenarios
Suitable for lighting control, food machinery, medical equipment, elevators, and electric control doors.
Outline Dimensions
The solid-state relay has a rectangular base with pins for mounting and connection. The main body dimensions are approximately 35mm in height, 17.8mm in width, and 63mm in depth. There are mounting provisions on the base. The pins are arranged linearly.
Pin Configuration:
- Pins 1 & 2: DC Input (+/-)
- Pins 3 & 4: AC Output (AC~, LOAD)
Wiring Diagram
The wiring diagram shows the DC input connected to terminals 1 and 2, and the AC output connected to terminals 3 and 4 for the load.
Temperature Curve
The temperature curve illustrates the derating of load current based on ambient temperature. For example, at an ambient temperature of 50°C, the maximum continuous current is approximately 11.5A without forced air cooling. At higher temperatures, the allowable current decreases significantly. A note indicates that the heat sink temperature should not exceed 85°C when using forced air cooling.
Precautions
- When the ambient temperature is high or solid-state relays are mounted closely together, users should consider derating the current capacity based on the temperature curve.
- For multiple solid-state relays operating simultaneously, it is recommended to maintain a spacing of at least one product width between them.
Safety Warnings
- The sides and baseplate of the product can become hot during operation. Allow the unit to cool before touching.
- Before installing or using this product, ensure that all power sources are disconnected.
- Verify that all connections are secure and correct before applying power.
