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Omron G7Z-4A-02Z-R DC24V — front view of the power relay showing the 4 M5 contact screw terminals at the bottom (T1, T2, T3, T4), the coil M3.5 screw terminals on top (A1, A2) and the DPST-NC auxiliary contact block above the main body

Omron G7Z-4A-02Z-R DC24V — Power Relay, 40 A, 4PST-NO

SKU: G7Z-4A-02Z-R DC24V

USD 46.00

G7Z power relay, 40 A 4PST-NO + 1 A DPST-NC aux, 24 VDC coil, DIN-rail. In stock.

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Product Overview

The Omron G7Z-4A-02Z-R DC24V is a 40 A power relay from the G7Z series It is manufactured by Omron Corporation. Hengyixin Automation stocks this relay in Xiamen and ships within 3-5 business days to most Asian, European, and North American ports.

The relay carries four Form A normally-open main poles rated 40 A each at 440 VAC resistive. The DPST-NC auxiliary contact block on top uses bifurcated-crossbar contacts rated 1 A at 440 VAC.

For a DIN-rail 4-pole safety relay at the same 24 VDC coil, see the G7SA-3A1B. Key specs: Contact Form 4PST-NO (4 Form A) main + DPST-NC auxiliary; Rated Carry Current NO 40 A; NC 25 A (at 70 degC derated); Rated Load (Resistive) NO 40 A at 440 VAC / 5 A at 110 VDC; aux 1 A at 440 VAC; Max Switching Power NO 17,600 VA resistive (9,680 VA inductive); aux 440 VA; Coil Voltage / Power 24 VDC; 156 ohm; 154 mA; 3.7 W; Operate / Release Must operate 18 VDC max; must release 2.4 VDC min; 50 ms each; Mechanical Life 1,000,000 operations minimum; Termination M5 screw (contacts); M3.5 screw (coil).

Key Features

  • G7Z power relay with 4PST-NO main contacts at 40 A each (440 VAC resistive)
  • DPST-NC 1 A bifurcated-crossbar auxiliary contact block on top
  • 24 VDC coil, 154 mA / 3.7 W, must-operate 18 V, must-release 2.4 V
  • DIN-rail or chassis mount, M5 contact + M3.5 coil screw terminals, 45 x 62 x 92.2 mm
  • SKU: G7Z-4A-02Z-R DC24V
  • Series: Omron G7Z-series power relay with auxiliary contact block
  • Voltage: 24 VDC

Best-Fit Applications

  • Inverter main contactor on a 400 V drive where the four NO poles switch the line-side power and the NC pole mirrors the contactor state
  • Solar DC string combiner on a 110 VDC array where the four NO poles carry 40 A continuous and the auxiliary feeds the PLC
  • Spare drop-in for an existing G7Z panel where the previous G7Z-4A-02Z-R failed and the wiring is 24 VDC coil with M5 contact terminals

Buying Checklist

  • Pick the G7Z-4A-02Z-R DC24V for a 40 A 4PST-NO power relay with a 24 VDC coil and a mirror-contact NC auxiliary.
  • Pick the G7Z-2A2B-11Z-R DC24V instead when only two NO poles at 25 A are needed with one NO + one NC auxiliary.
  • Pick the G7Z-4A-20Z-R DC24V instead when a DPST-NO auxiliary is preferred instead of DPST-NC.

Technical Specifications

Manufacturer Omron Corporation (Japan)
Series Omron G7Z-series power relay with auxiliary contact block
Model / SKU G7Z-4A-02Z-R DC24V
Contact Form 4PST-NO (4 Form A) main + DPST-NC auxiliary
Rated Carry Current NO 40 A; NC 25 A (at 70 degC derated)
Rated Load (Resistive) NO 40 A at 440 VAC / 5 A at 110 VDC; aux 1 A at 440 VAC
Max Switching Power NO 17,600 VA resistive (9,680 VA inductive); aux 440 VA
Coil Voltage / Power 24 VDC; 156 ohm; 154 mA; 3.7 W
Operate / Release Must operate 18 VDC max; must release 2.4 VDC min; 50 ms each
Mechanical Life 1,000,000 operations minimum
Termination M5 screw (contacts); M3.5 screw (coil)
Dimensions / Approvals 45 (W) x 62 (H) x 92.2 (D) mm; EN 60947-4-1 mirror-contact with G73Z

FAQ for G7Z-4A-02Z-R DC24V

What is the Z-R suffix on the G7Z-4A-02Z-R?
Z marks the bifurcated-crossbar auxiliary contact mechanism (single break); R is the contact plating. The main 4PST-NO block uses Ag alloy contacts at 40 A; the auxiliary DPST-NC block uses gold-clad bifurcated crossbar contacts at 1 A for low-level signal reliability.
Does the G7Z-4A-02Z-R carry any safety certifications?
The relay itself is UL and CSA listed. When paired with the G73Z-02Z-R auxiliary contact block, the combination carries EN 60947-4-1 mirror-contact certification for use in safety-related control circuits on motor contactors.
How is the G7Z-4A-02Z-R mounted?
Chassis mount with the M5 contact screws and the M3.5 coil screws on the front face. On a DIN rail, use the P7LF-D DIN-rail mounting bracket. The auxiliary contact block snaps on top of the main relay before wiring.
What is the coil resistance of the G7Z-4A-02Z-R DC24V?
156 ohms at 23 degC. The coil draws 154 mA at 24 VDC (3.7 W). The must-operate voltage is 18 VDC max and the must-release voltage is 2.4 VDC min.

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