NOARK · UL 1077 Supplementary Protector, 1–125A
Product overview
Original NOARK B1E UL 1077 supplementary protector for equipment circuits with upstream branch protection. Select the documented poles, trip code and rated current.
Technical selection summary
| Manufacturer / series | Original NOARK B1E |
|---|---|
| Standard / duty | UL 1077; supplementary overcurrent protection |
| Voltage / frequency | 480Y/277Vac, 50/60Hz; apply pole/current-dependent voltage ratings |
| Rated current | 1A, 1.6A, 2A, 3A, 4A, 5A, 6A, 8A, 10A, 13A, 15A, 16A, 20A, 25A, 30A, 32A, 35A, 40A, 50A, 60A, 63A, 80A, 100A, 125A |
| Poles | 1P, 2P, 3P |
| Trip codes | B: 3–5In; C: 5–10In; D: 10–20In; P: 8–12In (80–125A) |
| Interrupting ratings | 10kA at AC240V and 5kA at AC480Y/277V; DC values depend on pole count and current range, as in the manufacturer table |
| Mounting | 35mm DIN rail |
| Protection degree | IP20 |
UL 1077 supplementary protection requires a separate upstream branch-circuit protective device. It does not replace a UL 489 branch-circuit breaker. B/C/D trip codes cover 1–63A; P identifies the 80/100/125A version with the separately tabulated 8–12In instantaneous band. These selectors cover the tabulated 1P/2P/3P codes; other pole versions require separate documentation. The original catalogue contains differing notes on high-current accessories, so do not assume accessory interchangeability.
Typical applications
- Supplementary overcurrent protection within electrical equipment behind required branch-circuit protection.
- Control and OEM circuits selected for the exact UL 1077 supplementary-protector configuration.
Specify your enquiry
For a focused quotation, include:
- Selected model, poles, current and all applicable configuration options.
- Actual system voltage, frequency, protection duty and required accessories.
- Quantity, installation conditions, destination and required product documentation.
Download NOARK B1E catalogue (PDF)
Product reference images and drawings
