Unison 101 ZDA 60 40 01 Solid State Relay | 40A DC to AC Zero Cross SSR

The Unison 101 ZDA 60 40 01 is a high-performance 40 Amp DC to AC Solid State Relay (SSR) designed for reliable switching of AC loads using a low-voltage DC control signal. Featuring a 4–32VDC control input and 24–600VAC output, this Zero Cross SSR is widely used in industrial automation, heater control systems, temperature controllers, PLC panels, packaging machines, ovens, furnaces, and process control applications where silent, maintenance-free switching is required. It offers fast response, long operational life, and superior reliability compared to conventional electromechanical relays.

The 101 ZDA 60 40 01 utilizes Zero Cross switching technology, which turns ON the AC load only when the voltage waveform crosses zero. This minimizes electrical noise (EMI), reduces inrush current, and extends the life of resistive loads such as heaters. The relay is rated for 40A load current with an output voltage range of 24–600VAC (47–63Hz). It features 1600V peak blocking voltage (PIV), 6kV body isolation, 8kV input-to-output isolation, built-in surge protection up to 2700Vrms, and a long electrical life of up to 10¹¹ switching cycles. For continuous operation at higher currents, an appropriately sized heat sink is recommended.

Manufactured by Unison Controls, this industrial SSR is trusted by OEMs, machine builders, panel manufacturers, and automation engineers for dependable performance in demanding industrial environments.

Key Features

• Genuine Unison Solid State Relay
• Model: 101 ZDA 60 40 01
• Rated Load Current: 40A
• DC Control Input: 4–32VDC
• AC Output: 24–600VAC, 47–63Hz
• Zero Cross switching technology
• Silent and maintenance-free operation
• LED input status indication
• High-speed electronic switching
• Built-in surge voltage protection
• Long service life up to 10¹¹ switching cycles

Technical Specifications

• Model: 101 ZDA 60 40 01
• Brand: Unison Controls
• Product Type: DC to AC Solid State Relay (SSR)
• Input Voltage: 4–32VDC
• Input Current: 4–16mA
• Output Voltage: 24–600VAC, 47–63Hz
• Rated Load Current: 40A
• Switching Type: Zero Cross
• Peak Blocking Voltage (PIV): 1600V
• Body Isolation: 6kV for 1 minute
• Input to Output Isolation: 8kV for 1 minute
• Surge Protection: 2700Vrms
• Mounting: Panel Mount (Heat Sink Recommended)

Applications

• Industrial heater control systems
• Temperature controller output switching
• PLC automation panels
• Packaging and sealing machines
• Plastic processing machinery
• Industrial ovens and furnaces
• Textile machinery
• Conveyor systems
• Process automation equipment
• Industrial control panels

Why Buy From Voltkart?

• Genuine Unison Controls products
• GST invoice provided with every order
• Pan India delivery in 5–7 days
• Bulk pricing available on WhatsApp
• Expert technical support for product selection

Frequently Asked Questions

Q: What is the input and output voltage of the Unison 101 ZDA 60 40 01?

A: The relay accepts a 4–32VDC control input and switches 24–600VAC loads up to 40A, making it suitable for a wide range of industrial automation applications.

Q: What is the benefit of Zero Cross switching?

A: Zero Cross switching turns the relay ON only when the AC waveform crosses zero voltage, reducing electrical noise, minimizing inrush current, and increasing the service life of heaters and resistive loads.

Q: Does the 101 ZDA 60 40 01 require a heat sink?

A: Yes. For continuous operation or higher load currents, Unison recommends using a suitable heat sink to ensure efficient heat dissipation and maximize the relay's operating life.

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