Omron G3NB-210B-1 — 10 A SSR, 24 220 VAC, DC 5 24 V
SKU: G3NB-210B-1USD 5.50
G3NB compact SSR, 10 A at 40 °C, AC 24-220 V load, DC 5-24 V control, zero-cross trigger, DIN-rail or panel mount.
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Product Overview
The Omron G3NB-210B-1 is a 10 A single-phase solid state relay from the G3NB family. manufactured by Omron Corporation. Hengyixin Automation stocks this solid-state relay in Xiamen and ships within 3-5 business days to most Asian, European, and North American ports.
The "B" in the suffix means zero-cross triggering — the relay closes at the next zero-voltage crossing of the AC load after the control input is energised, instead of at an arbitrary phase angle. Zero-cross switching keeps the inrush low on resistive loads (heaters, lamps) and cuts the EMI spike that random-fire SSRs leave on the AC line.
Order one more G3NB-210B-1 as a spare per cabinet — SSRs fail open or short less often than contactors, but a hot swap on a downed heater takes minutes when the spare is on the shelf.
Key Features
- AC 24-220 V load voltage
- DC 5-24 V control input
- Approx. 60 g, 25 × 90 × 78 mm housing
- 10 A load current at 40 °C ambient (derated above 40 °C per the Load Current vs. Ambient Temperature curve)
- SKU: G3NB-210B-1
- Series: G3NB compact single-phase solid state relay
- Voltage: 24-220 V
Best-Fit Applications
- Heat-seal bar control on packaging machines running 24 VAC heaters
- Solenoid or transformer switching where zero-cross keeps the inrush low
- Temperature-controlled oven or incubator where a contactor would wear out cyclically
Buying Checklist
- Pick G3NA-440B-UTU instead for a 200-480 VAC load or when a heatsink is already integrated on the SSR.
- Pick G3PE-515B for a three-phase load (each phase carrying up to 15 A), not a G3NB — the G3NB is single-phase only.
- Pick G3NB-210B-1 for a 10 A zero-cross SSR at 24-220 VAC — pick G3NB-220B-1 (20 A) or G3NB-240B-1 (40 A) for higher current.
Technical Specifications
| Model | G3NB-210B-1 |
|---|---|
| Series | G3NB compact single-phase solid state relay |
| Load Voltage Range | AC 24-220 V (single phase) |
| Rated Load Current | 10 A at 40 °C ambient (derated above 40 °C) |
| Control Input | DC 5-24 V |
| Switching Method | Zero-cross trigger (B suffix) |
| Surge Protection | Built-in varistor absorbs inductive kickback |
| Isolation | Photocoupler between input and output |
| Indicator | Yellow LED — ON when input is energised |
| Mounting | DIN rail (TR35-15Fe / IEC 60715) or panel screw (M4) |
| Operating Temperature | -30 to +80 °C (no icing); derate load current above 40 °C |
| Approvals | UL, CSA, TÜV (EN) |
FAQ for G3NB-210B-1
What is the difference between G3NB-210B-1 and G3NB-220B-1?
The G3NB-210B-1 is rated 10 A at 40 °C; the G3NB-220B-1 is rated 20 A at 40 °C. Both share the same AC 24-220 V load range, the same DC 5-24 V control, and the same zero-cross trigger. The 210B-1 fits a single heater band or a small oven; the 220B-1 covers a larger heating element or a modest 3 kW resistive load. Above 20 A, step up to the G3NB-225B-1 (25 A) or G3NB-240B-1 (40 A).
Does the G3NB-210B-1 need an external heat sink?
Not at 10 A in a 25 °C cabinet — the relay's built-in tab is enough. Above 40 °C, or when the cabinet sits next to a VFD or PSU, mount the relay on an aluminium plate or rail and derate the load current. At 60 °C the relay typically carries about 6 A instead of 10. Skipping the derating is the most common cause of G3NB failure in the field — the triac overheats and fails short across the load.
Can the G3NB-210B-1 switch a DC load?
No. The G3NB family is built around a triac output and is designed for AC loads only. The triac cannot turn off against a DC voltage, so a DC load through a G3NB will stay latched on indefinitely once energised. For DC load switching, use the G3NA-D210B-UTU DC SSR (DC 4-48 V load, 10 A) or the G3F / G3R I/O SSRs in DIN-rail housings.
What does the "B" in G3NB-210B-1 mean?
Zero-cross trigger. The relay closes at the next zero-voltage crossing of the AC line after the control input is turned on. This cuts the inrush on resistive loads (heaters, lamps) and reduces the EMI spike on the AC line. The alternative — random-fire — closes at the next phase-angle crossing and is used where fast turn-on matters more than EMI. For most heater and lighting applications, zero-cross is the safer default.
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