Dayton
Dayton 33V928 IEC Miniature Circuit Breaker, NDB2T-63 B2/1 L Series, 2A, 1 Pole
A 2 A single-pole miniature circuit breaker with thermal-magnetic trip, UL 489 and CE listed for DIN-rail mounting
- IEC-standard miniature breaker fits DIN-rail panels
- Thermal-magnetic trip clears faults at 10 kA interrupting capacity
- UL 489 and CE listed for US and Canadian installations
- Single-pole 2 A B-curve protects 277 V AC and 48 V DC circuits
- Lug terminals accept 25–41 AWG conductors for flexible wiring
Single-pole 2 A DIN-rail breaker
This IEC miniature circuit breaker provides single-pole protection at 2 A with a B-curve thermal-magnetic trip. It mounts on a standard DIN rail and accepts wire sizes from 25 AWG to 41 AWG via lug terminals. The unit is UL 489 listed for the US and Canada and carries CE marking.
Sustained 277 V AC and 48 V DC operation
The breaker is rated for continuous use at 277 V AC and 48 V DC with a maximum interrupting rating of 10 kA at 277 V AC. Thermal-magnetic operation responds to both prolonged overloads and short-circuit currents without nuisance tripping under normal inrush conditions. The 32 A frame size supports consistent performance in industrial control panels.
Replaces older single-pole DIN breakers
This model replaces legacy single-pole DIN-rail breakers that lack a 10 kA interrupting rating at 277 V AC or do not meet UL 489. The upgrade is worthwhile when a panel requires certified short-circuit protection for 2 A lighting or control circuits. It is not suited for applications needing multi-pole isolation or higher current ratings.
Highlights
- IEC-standard miniature breaker fits DIN-rail panels
- Thermal-magnetic trip clears faults at 10 kA interrupting capacity
- UL 489 and CE listed for US and Canadian installations
- Single-pole 2 A B-curve protects 277 V AC and 48 V DC circuits
- Lug terminals accept 25–41 AWG conductors for flexible wiring
Specifications
| Brand | DAYTON |
|---|
Questions about this item
Does the 10 kA interrupting capacity at 277 V AC generate noticeable heat or noise during continuous operation?
The thermal-magnetic trip mechanism runs silently; heat rise stays within UL 489 limits for a 2 A single-pole breaker when mounted on a DIN rail with proper wire sizing.
What wiring and mounting items must I already have to install this 2 A breaker?
You need a DIN rail, 25 AWG to 41 AWG copper conductors, and lug-compatible terminals for the single-pole connection.
Will this UL 489-listed breaker coordinate with older 32 A frame panels and 48 V DC control circuits?
Yes — it shares the 32 A NDB2T frame footprint, carries a 48 V DC rating, and its B-curve thermal-magnetic trip aligns with legacy coordination tables.
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