Selec RSS-TA1A140ZP AC Input, AC Output Solid State Relay
Selec RSS-TA1A140ZP Solid State Relay – 40A, AC Input (90–280VAC), AC Output (24–330VAC), Zero-Cross TRIAC
A heavy-duty 40A AC-to-AC Solid State Relay featuring 90–280VAC control input, 24–330VAC load output, zero-cross TRIAC switching, LED input indication, IP20 touch-safe cover, and CE-grade performance for industrial heater and motor switching applications.
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The Selec RSS-TA1A140ZP is a 40A single-phase solid-state relay designed for applications requiring reliable AC-to-AC switching. With a wide AC input control range (90–280 VAC), a TRIAC output rated 24–330 VAC, zero-cross switching, and LED input indication, it is ideal for heaters, lighting loads, small motors, and industrial automation panels.
KEY FEATURES
40A rated load current
AC control voltage 90–280 VAC
AC output 24–330 VAC
Zero-cross switching for reduced EMI and load stress
TRIAC output device (TA-series = TRIAC AC output)
LED input status indicator
IP20 touch-safe removable cover
Surge protection up to 800 Vpk
Low on-state voltage drop: 1.5V at rated load
Reliable, maintenance-free switching
TECHNICAL SPECIFICATIONS
Input Specifications
| Parameter | Value |
|---|---|
| Control Voltage Range | 90–280 VAC |
| Control Current | 7–20 mA |
| Pickup Voltage | 90 VAC |
| Dropout Voltage | 45 VAC |
| Maximum Response Time | ½ cycle + 1 sec |
| Reverse Voltage Protection | Available |
| Max Reverse Voltage | 40 VDC |
| Zero-Cross Turn-On | Yes |
| LED ON Indicator | Yes |
Output Specifications
| Parameter | Value |
|---|---|
| Maximum Load Current | 40A |
| Minimum Load Current | 50 mA |
| Load Voltage Range | 24–330 VAC |
| Transient Voltage | 800 Vpk |
| Off-State Leakage Current | 10 mA |
| On-State Voltage Drop | 1.5V |
| dv/dt Rating | 1000 V/μsec |
| 1-second Surge Current (Ta=25°C) | 150 Apk |
| 1-cycle Surge Current | 400 Arms |
| Thermal Resistance (RθJC) | 0.9 °C/W |
| Minimum Heat Sink Required | 1°C/W |
3. General Specifications
| Parameter | Value |
|---|---|
| Dielectric Strength (I/O to Ground) | 4000 Vrms |
| Dielectric Strength (Input ↔ Output) | 4000 Vrms |
| Insulation Resistance | 100 MΩ at 500 VDC |
| Input/Output Capacitance | 0.8 pF |
| Ambient Temperature | −30°C to +80°C |
| Storage Temperature | −30°C to +100°C |
| Humidity | 93% RH non-condensing |
Housing & Mechanical
| Parameter | Value |
|---|---|
| Dimensions | 44.5 × 57.5 × 27.3 mm |
| Weight | 87.2 g |
| Mounting Type | Panel mount |
| Material | Glass-filled polyester |
| Baseplate | Aluminium |
| LED Indicator | Red |
| Input & Output Terminals | M4 (input), M5 (output) |
Tightening Torque
M4 Input: 1.2 N·m
M5 Output: 2.0 N·m
APPLICATIONS
Heating elements
HVAC controls
Lighting automation
Small motor switching
Solenoids & inductive-resistive AC loads
Industrial control panels
WHAT’S IN THE BOX
Selec RSS-TA1A140ZP SSR
IP20 protective cover
Mounting screws
Quick-install leaflet
FAQS
Q1. What is the input (control) voltage range?
90–280 VAC.
Q2. What load voltage can it switch?
24–330 VAC.
Q3. Is it a zero-cross type?
Yes—ZP = Zero-Cross switching.
Q4. Does it support inductive loads?
This model is resistive load optimized (no “L” suffix).
For inductive loads, choose RSS-TA1A240ZPL / 225ZPL.
Q5. Is a heat sink required?
Yes—minimum 1°C/W at 40°C ambient.
Q6. Does it have LED indication?
Yes—the LED shows the input ON state.