OMRON G3PA-260B-VD Single-Phase Solid State Relay

Product Type: Single-phase SSR (Solid State Relay), integrated heat sink, zero-cross turn-on

Input: DC 5~24V; Output: AC 24~240V, 60A @ 40℃

1. Key Specifications

Control Input: DC 5–24V, max control current 7mA; operate voltage ≤4V, release voltage ≥1V

Load Voltage: AC 24～240V (operating range 19～264VAC, 50/60Hz)

Rated Current: 60A (AC-1, 40℃); derate to 48A when densely installed side-by-side

Surge Current: 440A (60Hz, 1 cycle); VDRM 600V

On-state Voltage Drop: ≤1.6V RMS; Off-state Leakage Current: ≤20mA @ 200VAC

Trigger Mode: Zero-crossing Turn-on, minimizes inrush & EMI

Isolation: Phototriac optocoupler isolation

Dielectric Strength: 4000VAC 1min; Insulation Resistance ≥100MΩ (DC500V)

Mounting: DIN rail / screw mounting; with operation indicator

Ambient Temperature: -30～+80℃ (no condensation); Storage: -30～100℃

Feature: Replaceable power cartridge for low maintenance cost

2. Model Number Decoding

G3PA: Series of high-current SSR with replaceable power modules

2: Output voltage class AC24–240V (4 = AC200–400/480V high voltage)

60: Rated current 60A

B: Integrated heat sink

VD: DC voltage input (DC5–24V)

3. Typical Applications

Resistive AC loads such as heating tubes, infrared lamps, fans and conveyors; directly driven by PLC transistor outputs.

Note: Add varistor/RC snubber for inductive motor loads; never operate over current or over temperature.

4. Same Series Cross Reference

G3PA-240B-VD: AC24–240V, 40A

G3PA-430B-VD: AC200–400V, 30A

5. Domestic Equivalents (DC5-24V input, AC24-240V, 60A zero-cross SSR)

Meigeer MGR-1 D60

Ximanton H360ZF

Yangming SSR-60DA-H

Application Scenarios for G3PA-260B-VD

Core features summary: DC5–24V control, AC24–240V single-phase output, 60A, zero-cross trigger, built-in heat sink, field-replaceable power cartridge, PLC direct drive, contactless, high-frequency switching. First choice for resistive heating loads.

Reminder: This is a single-phase SSR; use 3 units in parallel for 3-phase heating control (one per phase).

Main Applications (Best Match)

1. Temperature-controlled heating systems (largest application)

Industrial ovens, drying cabinets, thermostatic baths, aging test chambers; barrel heating for injection & extrusion machines, mold temperature controllers; heat-seal blades, hot plates on packaging machines; electroplating tank heaters, thermal oil heaters.

Advantage: Zero-cross switching avoids voltage spikes; matches PID time-proportion control from temperature controllers; contact-free design delivers ultra-long life for frequent cycling.

2. High-power resistive lighting

Infrared heating lamps, halogen lamps, greenhouse supplementary lighting arrays.

✘ Not recommended: Fluorescent lamps & LED power supplies (inductive/capacitive surge loads).

3. Light-duty fans & conveyors (inductive loads with surge protection)

Small centrifugal fans, hot air circulation blowers, single-phase conveyor motors with infrequent starts.

⚠️ Motors are inductive loads; external varistor/RC snubber is mandatory to suppress back EMF, otherwise the SSR will break down easily. Not suitable for large motors or frequent forward/reverse operation.

Other General Automation Applications

1. Packaging machinery: Heat shrinkers, hot-knife cutters, hot air power control
2. Rubber & plastic equipment: Heating platens for vulcanization & thermoforming molds
3. Environmental test equipment: Heating circuits in temperature & humidity chambers
4. Food machinery: Baking lines, fryer heating elements, thermal blanching equipment
5. HVAC: Electric duct heaters, auxiliary air-conditioning heating sections
6. Cabinet power distribution: Replace relay + contactor combinations; quiet, arcless operation, DIN rail installation.

When to choose this SSR instead of electromagnetic contactors

Frequent ON/OFF cycling & PID power regulation (switching every several seconds)

Controlled by PLC or temperature controller DC24V transistor outputs

No arc noise, no contact burn-out & low maintenance required

DIN rail mounting with limited cabinet space, integrated heat sink included

Quick power cartridge replacement without full rewiring later

Unsuitable / Restricted Applications

Direct-on-line starting of large motors, frequently started pumps (high inrush current causes instant damage)

Capacitive loads, large switching power supply banks

400VAC loads (max rated voltage only 264VAC)

DC loads (this model is AC-output SSR only)

Circuits requiring short-circuit protection: SSR has no built-in short-circuit protection; fuse/circuit breaker must be installed upstream.

Sizing Tips

Derate to 48A when tightly mounted side-by-side (80% current rating); always leave current margin.

Inductive loads: Fit external 471K (470V, ≥1000A) varistor across output terminals, shortest wiring possible.

3-phase heating scheme: 3 independent G3PA-260B-VD, one per phase, keep 3-phase load balanced.

PID Power Regulation Wiring + Varistor Selection + Derating Installation Standard

Key note: This is a zero-crossing SSR, designed exclusively for time-proportion PID power regulation, not for phase-angle voltage regulation. DC5~24V input, control current ≤7mA; PLC transistor outputs and temperature controller SSR ports can drive it directly without auxiliary relays.

1. PID Control Wiring (Temperature Controller / PLC)

Terminal Definition (G3PA-260B-VD)

Control Input: A1(+), A2(-) (DC5~24V; reverse polarity will not burn the unit, just no operation)

Power Output: Line IN, Line OUT (series-connected on live wire, 24~240VAC)

Recommended wiring: MCB → semiconductor fast fuse → SSR output → Load → Neutral (N wire bypasses SSR entirely).

Scheme 1: Driven by OMRON E5CC/E5EC Temperature Controller (Most Common Heating Loop)

1. SSR output of temperature controller → A1(+), A2(-) of G3PA
2. Separate power supply & PT100 thermocouple wiring
3. Critical parameter settings

Output mode: SSR / Time Proportion (Zero-cross); DO NOT select phase-angle mode

Cycle Time (T): 20~40s for resistive heating; 30s for ovens & mold heaters. Too short a cycle causes overheating; too long creates large temperature fluctuations.

Run AT auto-tuning after stable temperature holding.

Note: Open-collector outputs on temperature controllers have built-in 24VDC drive power, directly compatible with G3PA.

Scheme 2: PLC Transistor DO Drive (PNP / NPN)

PNP output: PLC Y terminal → A1(+); 0V of 24VDC → A2(-)

NPN output: 24VDC+ → A1(+); PLC Y terminal → A2(-)

PLC program: Use fixed-cycle duty-cycle output (e.g. 30s period, 0~100%). Avoid high-frequency PWM which overheats the thyristor.

Only 7mA input current; standard PLC transistor outputs can drive it without current-limiting resistors.

3-phase Heating (3× G3PA-260B-VD)

Independent phase control: one single-phase SSR per A/B/C phase. Inputs can share multi-channel SSR outputs from one temperature controller or multiple PLC DO points.

⚠️ This is not a 3-phase SSR; only 3 separate single-phase units, keep load current balanced across 3 phases.

2. Varistor & RC Snubber Selection (Mandatory for Inductive Loads)

The G3PA has an internal varistor, but inductive back EMF exceeds internal absorption capacity; external MOV is required, wired directly across SSR output terminals with minimal lead length.

220VAC System (Primary Application)

Varistor: 14D471K (470V, ≥1000A surge current); 10D471K also acceptable.

110VAC System: 14D271K (270V, ≥1000A)

RC snubber (for solenoid valves, small fans & transformers):

C=0.047~0.1μF / 630VAC; R=100~220Ω / 2W, series RC across output terminals.

✅ Resistive heating tubes: External snubber optional; ✅ Fans, coils & transformers will blow the SSR without external MOV.

Upstream Fuse Protection (Critical: SSR has no short-circuit protection)

Semiconductor SSR fails instantly under short-circuit conditions; use aR/gR semiconductor fast fuses, not standard gG general fuses.

Resistive heating loads: 80A fast fuse (1.2~1.5× rated current of 60A)

Inductive fan loads: 100A fast fuse

Install fuse immediately upstream of the SSR to shorten fault loop length.

3. Derating & Installation Specifications (G3PA-260B-VD Special Rule)

The G3PA-260B-VD cannot be tightly mounted side-by-side (stated in official datasheet), different from 240B/220B models.

1. Full rating condition: Vertical independent mounting, ≥10mm clearance left & right, ambient temp ≤40℃ → 60A full current.
2. Densely arranged on DIN rail:

2 or more units installed tightly together: Max current limited to 48A (80% derating).

4+ units side-by-side: Maintain ≥10mm gap between adjacent SSRs, otherwise overheating failure occurs.

Vertical stacking: ≥80mm vertical gap between upper & lower SSRs to keep airflow.

3. Horizontal flat mounting (heat sink sideways): Derate current by an additional 30%; avoid this mounting orientation.
4. Cabinet ambient >40℃: Further derate current per temperature derating curve; add cabinet cooling fans.
5. Terminal torque: M3.5 screw terminals, tighten to 0.8~1.2N·m. Loose terminals cause overheating & burnt terminals.
6. Cartridge replacement: G3PA allows standalone replacement of the G32A power cartridge without rewiring main power circuits, ideal for bulk maintenance.
7. Commissioning Troubleshooting Checklist
8. Never use this zero-cross SSR for phase-angle dimming/power control; it only supports time-proportion ON/OFF power regulation.
9. Off-state leakage: ≤20mA residual voltage across load when SSR is OFF; always isolate upstream MCB before maintenance.
10. Do not add large series resistors on input side; low voltage will cause false triggering.
11. Separate DC24V control wiring from high-current power cables to avoid EMI interference.
12. Cold heating element inrush current: Limit heater rated current to ≤70% of SSR rated current for extra safety margin.
13. Quick Fault Diagnosis

Indicator ON, load no heat: Open circuit on main circuit, blown fuse, broken heater element.

Indicator OFF: No input voltage/polarity reversed, temperature controller output disabled, PLC program no output.

Repeated SSR breakdown: No external MOV for inductive loads, insufficient heat dissipation, oversized fuses, frequent mains voltage surges.

Severe temperature oscillation: PID cycle time too short, P-gain too high, poor thermal insulation, thermocouple misposition.

OMRON Single-Phase SSR + Electromagnetic Power Relay List

Note: All SSRs are zero-crossing, opto-isolated. G3PA series (your current model) features replaceable power cartridges, integrated heat sink & DIN rail mounting. G3NA/G3NE are cost-effective compact SSRs. Electromagnetic relays are plug-in cabinet relays for PLC & temperature control loops.

Part 1: G3PA Series (Single-phase SSR, Priority Model)

Replaceable Power Cartridges

G32A-A20-VD-X: For G3PA-220B

G32A-A40-VD: For G3PA-240B

G32A-A60-VD: For G3PA-260B

Part 2: G3NA Economy Single-phase SSR (No integrated heat sink)

Part 3: G3NE Compact Mini SSR (Space-saving low-power use)

Part 4: G3PJ / G3PE New Generation SSR (Spring terminals, high surge resistance)

G3PJ-225B: AC24–240V, 25A, DC5–24V

G3PJ-245B: AC24–240V, 45A, DC5–24V

G3PE-225B: AC24–240V, 25A, DC5–24V

G3PE-245B: AC24–240V, 45A, DC5–24V

Model Coding Rule:

2 = AC24~240V (220V heating mainstream)

4 = AC200~400/480V high voltage

VD = DC input; A = AC input

Part 5: OMRON Electromagnetic Power Relays (Plug-in cabinet type)

1. G2R Series (General-purpose Intermediate Relays)

2. LY High-current Plug-in Power Relays (Replace small contactors)

3. G7L High-capacity Power Relays (30A direct single-phase load control)

4. G6B / G6D PCB Mini Relays (Onboard PLC & temperature controllers)

G6B-1174P: 1a, 5A, DC24V

G6D-1A: 1a, 5A, DC24V

Part 6: Selection Guide: SSR vs Electromagnetic Relay

1. Heating, PID power regulation, frequent switching & arcless operation → G3PA (First Choice) / G3NA
2. PLC DO signal conversion, low-frequency switching → G2R intermediate relay
3. ≤30A low-frequency single-phase loads, cost-sensitive → G7L / LY relays
4. Low-power, space-restricted applications → G3NE, G3PJ