Description
The FOTEK ESR-40DA is a three-phase, three-control solid-state switching unit engineered for contact-free, high-cycle switching of AC loads up to 380 VAC. Utilizing Original Engineering design standards, this unit incorporates optical isolation between the low-voltage DC control circuit and high-power AC output stages. Equipped with integrated zero-cross firing logic, the ESR-40DA eliminates inductive voltage surges, high inrush transients, and electrical contact arcing, drastically extending the service life of industrial process heating and automation equipment.
MODEL CODE ARCHITECTURE
ESR: Three-Phase Solid-State Relay Series
40: 40 A Maximum RMS Current Rating per Phase
D: DC Input Control (4 to 32 VDC)
A: AC Load Output (24 to 380 VAC)
TECHNICAL SPECIFICATIONS
Manufacturer: FOTEK Controls Co., Ltd.
Model Number: ESR-40DA
Product Type: Three-Phase Three-Control Solid-State Relay
Control Voltage Range: 4 to 32 VDC
Control Input Current: 6 to 25 mA
Turn-On Voltage: 3.5 VDC minimum
Turn-Off Voltage: 1.0 VDC maximum
Rated Load Current: 40 A per phase (with appropriate heatsink)
Load Voltage Range: 24 to 380 VAC (47 to 63 Hz)
Peak Blocking Voltage: 800 Vpk
Switching Type: Zero Cross Trigger
Response Time Turn-On: Less than 8.3 ms (at 60 Hz)
Response Time Turn-Off: Less than 8.3 ms (at 60 Hz)
On-State Voltage Drop: Less than 1.6 VAC at rated current
Off-State Leakage Current: Less than 3.0 mA at 220 VAC
Dielectric Strength: Greater than 2500 VAC (50/60 Hz) for 1 minute between terminals and base
Insulation Resistance: Greater than 50 MΩ at 500 VDC
Status Indication: Red LED Operation Indicator
Housing Material: Flame-Retardant PBT Engineering Thermoplastic (UL 94V-0)
Baseplate Material: High Thermal Conductivity Aluminum
Operating Ambient Temperature: -20 °C to +80 °C
Storage Temperature: -40 °C to +100 °C
Ambient Humidity: 45% to 85% RH (Non-condensing)
Terminal Configuration: Heavy-Duty Screw Terminals with Integrated Protective Safety Cover
Mounting Configuration: Panel / External Heat Sink Surface Mounting
Dimensions: 105 mm x 75 mm x 38 mm
Weight: 440 g
Compliance: CE, RoHS
INDUSTRIAL APPLICATION & CRITICAL PROBLEM SOLVING
In high-throughput thermal processing—such as plastic extrusion barrel zones, thermoforming machines, industrial reflow ovens, and commercial packaging sealers—electromechanical contactors suffer from rapid contact pitting, welding, and acoustic noise caused by constant PID cycle switching. The FOTEK ESR-40DA provides solid-state semiconductor switching with zero-cross synchronization, activating strictly at the zero-voltage crossing point of the AC waveform. This architecture suppresses electromagnetic interference (EMI), prevents line harmonics, and prevents thermal oscillation on heavy delta- or wye-connected resistive heater arrays, ensuring stable temperature tolerance and zero operational downtime.
SYSTEM INTEGRATION & AVAILABILITY
Technical Compatibility: Standard industrial footprint compatible with standard 3-phase SSR heatsinks and DIN rail mounting adapters. Interfaces directly with PLC DC transistor outputs, microcontrollers, and PID temperature control modules without requiring intermediate interposing relays.
Lead Time: Ex-stock to 2-3 business days standard dispatch for replacement and production line overhaul requirements.
Key Attributes
Brand Name: FOTEK
Model Number: ESR-40DA
Type: Three phase three control solid-state relay
Relay Type: Three phase three control
Mounting Type: Screw
Place of Origin: Taiwan, China
Description: -
Application: Load heating
Output Type: Exchange
Coil Type: AC control DC
Circuit: -
Connector Type: -
Voltage - Output: 24~380VAC
Contact Rating (Current): 40A
Voltage - Input: 4~32VDC
Switching Voltage: <3.0VDC
Current - Input: -
Contact Form: -
Voltage - Load: -
On-State Resistance (Max): -
Current - Output: -
Termination Style: -
Load Current: -
Coil Current: -
Coil Voltage: -
Series: ESR-DA
Features: -
Model: ESR-40DA
Rated current: 40A
I²t for fuse: 664A²S
Surge current: 410A
Respones time: 8.3 ms (60Hz)
Output voltage: 24~380VAC
Lnput voltage: 4~32VDC
Turn off voltage: <3.0VDC
Packaging and Delivery
Selling Units: Single item
Single package size: 15X10X7 cm
Single gross weight: 0.500 kg
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