Product Description
Delta LA603
3 or 4 Wire • Three Phase • 440–600VAC AC Lightning Arrestor
Delta AC Lightning Arrestors provide rapid‑response, high‑current surge protection for sensitive electronics, industrial equipment, and three‑phase power systems. The Delta LA Series is engineered to handle extreme surge events—up to 50,000 amps—safely diverting energy to ground.
The LA603 model is designed for 240/480/600VAC three‑phase systems (3‑wire or 4‑wire service). It is ideal for commercial, industrial, and high‑voltage applications where robust surge protection is required.
Delta Arrestor Features
- Non‑conductive base prevents shock hazards in the event of failure
- Fails without producing carbon dust that could damage nearby equipment
- Always fails “clear,” allowing continued system operation
- Silicon‑based design for fast response and low conduction resistance
- Handles numerous high‑energy surges and half‑cycle spikes before failure
- Extra‑long leads for easier installation
- Includes locknut and bushing
- Available in multiple voltages and pole configurations
LA603 Specifications
| Rated Voltage | Design Type | Surge Current | Max Energy | Leads | Enclosure Rating | Dimensions |
| 240/480/600VAC Three Phase 3 or 4‑Wire |
Silicon Oxide Varistor | 100,000 amps | 3,000 Joules per pole | 36" #12 THHN | NEMA 4 | 4.5" H × 2.25" D |
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