The Omron H3BG‑8 is a rugged 8‑pin plug-in star‑delta timing relay designed for controlling motor start sequences in industrial applications. It offers adjustable star-connect timing and automatic transfer to delta, with self-reset functionality. Some versions (H3BG‑8H) also include an instantaneous output contact for additional control flexibility.

🔧 Key Features

Model / P/N: H3BG‑8 (also H3BG‑N8, H3BG‑8H for extra instantaneous contact)
Supply Voltage:
- Standard H3BG‑8: 100–120 VAC, 50/60 Hz
- H3BG‑N8 variant: 220 VAC
Timing Range: 0.5–120 s with four selectable scales (e.g., 0.5–6, 1–12, 5–60, 10–120 s)
Star–Delta Transfer Time: User-selectable from 0.05 to 1.0 s
Outputs:
- Two time-limit SPST-NO contacts (star and delta)
- H3BG‑8H adds an instantaneous SPST‑NO contact
- Contact Rating: 5 A @ 250 VAC (resistive)
Reset Method: Self-reset after timing cycle completes
Mounting: 8-pin octal plug-in socket (e.g., P2CF-08); surface or panel mounting with covers/adapters
Approvals: UL, CSA, CE, CCC compliant; insulation withstand 2 kVAC, impulse withstand up to 4.5 kV
Performance Specs:
- Timing accuracy ±0.3% FS; setting error ±5% FS ±50 ms
- Power consumption approx. 2.3 W (110 VAC) / 7 W (220 VAC)
Environment: –10 °C to +55 °C, 35–85% RH; resistant to vibration and shock per IEC standards
Dimensions: Approx. 45 × 45 × 93 mm; weight ~110 g (H variant ~130 g)

Omron – H3BG-8 (H3BG-N8/H3BG-8H) – Star–Delta Timer Relay, 100-120 VAC, 5 A

Omron – H3BG-8 (H3BG-N8/H3BG-8H) – Star–Delta Timer Relay, 100-120 VAC, 5 A