Omron G3PE-225BL DC12-24V — Solid State Relay
SKU: G3PE-225BL DC12-24VUSD 30.00
Compact slim-profile solid-state relay with integrated heat sink, 25 A single-phase 100-240 VAC load, non-zero-cross switching (random turn-on for inductive loads), 12-24 VDC control input, DIN-rail or screw mount. UL/CSA/TUV certified.
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Product Overview
The G3PE-225BL DC12-24V is Omron's 25 A non-zero-cross single-phase solid-state relay (SSR) in the compact G3PE-series slim-profile body with integrated heat sink — the inductive-load counterpart to the G3PE-225B (already done, zero-cross version for resistive heaters). The 'L' suffix encodes non-zero-cross switching — the SSR turns on at any phase angle of the AC cycle, not just at the zero-crossing point. This makes the 225BL the right pick for inductive loads (transformers, solenoids, motors, capacitor banks) where the load current and voltage are out of phase and the zero-cross detection circuit would fail to trigger reliably. For resistive loads (heaters, ovens, hot plates), the zero-cross G3PE-225B is preferred to eliminate inrush and EMI.
Decoding G3PE-225BL within the G3PE family
The G3PE-@@@@ model code has four positional digits that encode current rating, voltage class, and zero-cross function. The '2' = single-phase 100-240 VAC class (vs '5' = 200-480 VAC). The '25' = 25 A rated current (vs '15' = 15 A, '35' = 35 A, '45' = 45 A). The 'B' = standard DC control input (12-24 VDC). The 'L' (suffix) = non-zero-cross switching (no suffix = zero-cross). The G3PE-225BL codepoint thus decodes as 25 A 100-240 VAC single-phase, DC12-24 VDC control input, non-zero-cross.
Non-zero-cross vs zero-cross — when to choose each
The fundamental difference between zero-cross (G3PE-225B, done) and non-zero-cross (G3PE-225BL, this SKU) is the turn-on trigger: (a) Zero-cross SSR (B variant) - the output triac/MOSFET only turns on when the AC voltage crosses zero (0 V). For resistive loads, this eliminates the inrush current that would flow when switching a cold heater element at peak voltage. For example, a 5 kW 240 VAC heater has a cold resistance of ~12 ohms, so switching at peak voltage (340 V) draws ~28 A peak inrush. Zero-cross limits this to the natural zero-cross current, eliminating inrush and EMI.
Surge protection and dielectric strength
The G3PE-225BL includes built-in surge absorption (varistor on the output) and improved surge dielectric strength per the G3PE datasheet. The varistor clamps voltage transients on the load side (from inductive kickback or lightning-induced surges on the AC line) to safe levels, preventing damage to the SSR's output triac. The improved surge dielectric strength (compared to older G3PA series) allows the SSR to withstand the high dv/dt of modern switching power supplies and VFD-induced voltage spikes on shared AC lines.
Key Features
- G3PE-series slim-profile solid-state relay with integrated heat sink
- Single-phase 100-240 VAC load voltage
- 25 A rated operation current at AC-1
- 18 A close-mount rated current
- Non-zero-cross switching
- Control input: 12 to 24 VDC, 10 mA max
- Must release voltage: 1 V max
- Operate time: 1 ms max
- SKU: G3PE-225BL DC12-24V
- Series: G3PE Single-Phase Solid State Relays for Heaters
- Voltage: 100 TO 240 VAC
- I/O: 12 I/O
Best-Fit Applications
- Transformer-coupled oven heater control - G3PE-225BL switches a 5 kW 240 VAC transformer-coupled oven heater where the inductive transformer load.
- Solenoid valve bank control - G3PE-225BL drives a bank of 240 VAC solenoid valves on a hydraulic manifold; the solenoid.
- Motor starting relay for small fans/pumps - G3PE-225BL drives a fractional-horsepower motor where the inductive motor winding has phase shift.
- Capacitor bank switching for power factor correction - G3PE-225BL switches a 25 A 240 VAC capacitor bank for PFC; the.
Buying Checklist
- Pick G3PE-225BL DC12-24V for 25 A non-zero-cross SSR with integrated heat sink - for inductive loads
- Pick G3PE-225B DC12-24 for 25 A zero-cross SSR - for resistive heaters
- Pick G3PE-215B/L for 15 A - smaller heater loads
- Pick G3PE-235B/L for 35 A - larger heater loads
- Pick G3PE-245B/L for 45 A - industrial process heaters
- Pick G3PE-525B/L for 25 A 200-480 VAC - North American 277/480 V industrial systems
Technical Specifications
| Model | G3PE-225BL DC12-24V |
|---|---|
| Series | G3PE Single-Phase Solid State Relays for Heaters |
| Type | 25 A non-zero-cross solid-state relay with integrated heat sink |
| Zero-Cross Function | NO (L variant - non-zero-cross / random turn-on) |
| Rated Load Voltage | 100 to 240 VAC at 50/60 Hz |
| Load Voltage Range | 75 to 264 VAC |
| Rated Operation Current (AC-1, resistive) | 25 A continuous at 40 C ambient |
| Rated Operation Current (close-mount, derated) | 18 A continuous at 40 C ambient |
| Applicable Heater Capacity (AC-1, 200 VAC) | 5 kW |
| Applicable Heater Capacity (AC-1, 240 VAC) | 6 kW |
| Control Input Voltage | 12 to 24 VDC |
| Control Input Current | 10 mA max at 24 VDC |
| Must Operate Voltage | 9.6 V max (turn-on threshold) |
| Must Release Voltage | 1 V max |
| Output ON Voltage Drop | 1.6 V max at 25 A load |
Resources & Downloads
FAQ for G3PE-225BL DC12-24V
What's the difference between G3PE-225BL and G3PE-225B?
Both are 25 A single-phase 100-240 VAC solid-state relays in the same slim-profile G3PE body with integrated heat sink, same 12-24 VDC control input, same DIN-rail or screw mounting, same UL/CSA/TUV certifications. The only difference is the switching mode: G3PE-225B (already done) is zero-cross (turns on only when AC voltage crosses zero, eliminating inrush on resistive loads); G3PE-225BL (this SKU) is non-zero-cross (turns on at any phase angle, for inductive loads).
Can I use the G3PE-225BL with a DC load?
No - the G3PE-225BL is designed for AC loads only (100-240 VAC, 50/60 Hz). The triac output stage requires the AC cycle to commutate (turn off) at the zero-cross of the AC voltage. For DC loads, the triac will not commutate and will latch on indefinitely (potentially burning out the SSR and the load).
Why does the G3PE-225BL have a 'L' suffix and what does it mean?
The 'L' suffix on the G3PE-225BL (and other G3PE-@5BL models) stands for 'non-zero-cross' or 'random turn-on' (also called 'phase angle switching' or 'instant-on'). A standard G3PE-225B (no L suffix) is a zero-cross SSR that only turns on the output triac when the AC voltage is at or near 0 V (the zero-cross point). This eliminates the inrush current and EMI generated when switching a cold resistive load at peak voltage.
What fuse should I use to protect the G3PE-225BL?
The G3PE-225BL should be protected by a fast-acting semiconductor fuse rated for the load current and the I^2t of the SSR. Per the G3PE datasheet, the permissible I^2t value is 260 A^2s. A typical fast-acting fuse selection is: 50 A 600 VAC semiconductor fuse (e.g., Ferraz Shawmut A50QS50-4 or Bussmann FWH-50A14F) for a 25 A continuous load with 260 A^2t let-through.
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