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Solid State Relay - 75 AMP - 2 Pole or 3 Pole - AC Control - Standard Back-plate - 120V Fan

SKU: 3PSS60A75 S-120A

A Solid State Relay family designed to switch various loads such as heating elements, motors and transformers. The relay is capable of switching high voltages up to 600 VAC rms.

The built-in Varistor for heavy industrial applications. For higher reliability and load cycle capability three semiconductor power units are bonded directly to the substrate.

Spec Sheet

Manufacturer: MDI Relays & Switches

Weight: 3.53 lb

Delivery: 1 - 6 weeks


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  • Competitor Crosses
    • Carlo Gavazzi
      • RZ3A40A75
      • RZ3A48A75
      • RZ3A60A75
  • Control Voltage 24-275 VAC / 24 - 50 VDC
  • Fan (Required) 120 V.A.C. @ 3.6 WATTS & 55mA
  • Operational ratings
    • Up to 75A rms & 600 VAC using 2 poles
    • Up to 50A rms & 600 VAC using 3 poles
  • Line & Load accepts 8-18 AWG
  • Non-repetitive voltage 1150 Vp
  • Opto-insulation > 4000 VAC
  • Operational voltage range 42-660 VAC
  • Blocking voltage 1600 Vp
  • Rated operational current
    • AC51 @ Ta=25°C 75 AMPS rms
    • AC53a @ Ta=25°C 20 AMPS rms
  • Minimum operational current 400 mA rms
  • Rep. overload current t = 1 s < 150 A rms
  • Non-rep. surge current t = 10 ms 1150 Ap
  • Off-state leakage current < 3 mA rms
  • I2t for fusing t = 10 ms 6600 A2s
  • On-state voltage drop ≤ 1.6 V rms
  • Critical dV/dt off-state ≥ 500 V/µs

MDI Inc. Our Company!

See all MDI Electrical Products
Mercury Displacement Industries Incorporated, better known in the industry we serve as MDI, was incorporated in Michigan in 1975. The primary product line is switch gear components including mercury type contactors, tilt switches and liquid level float controls.
Contactors are rated from 30 to 100 Amperes and are commonly used in various heating, lighting, and many other industrial applications including high voltage ultraviolet type loads. The contacts are encased in hermetically sealed stainless steel tubes to provide reliable switching for millions of operations. All basic units are UL, CSA, and CE approved.
The liquid level control floats are manufactured with mechanical or mercury switches. The float material is High Impact Polystyrene for normal alarm, sump pump or water applications, For sewage, 1 or 2 H.P. or high temperature, 86°C (186°F) requirements Acrylonitrile Butadiene Styrene, (ABS) float material is provided.
MDI has 40 to 50 employees and markets products through distributors, representatives or direct to OEM accounts throughout the world.

MDI Quality Policy
It is the policy of MDI to manufacture and market products of excellent quality, durability and reliability. This policy emphasizes the importance of product reputation and customer satisfaction in the success of our business. The MDI Team is committed without exception to the continuous improvement in quality and cost, and to manufacturing productivity and efficiency.

Since 1975
MDI Quality - Durability - Reliability

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