Type 452 — DC Power Circuit Breaker / Protector
Remote-operated supplementary protector for 28 V DC power distribution in vehicle,
aircraft and general industrial applications.
Current 50 – 100 A range
Voltage 28 V DC system
Breaking 6 kA interrupting capacity
Life 2,500 operations at In
Standard Current Ratings & Typical Voltage Drop
| Current rating (A) |
Typical volt drop (mV) |
Current rating (A) |
Typical volt drop (mV) |
| 50 | 90 | 80 | 92 |
| 60 | 85 | 90 | 100 |
| 70 | 85 | 100 | 100 |
| 75 | 90 | | |
* Typical values; maximum limits are defined in the relevant standards.
Approvals (without auxiliary contacts)
| Authority / Standard |
Rated voltage |
Approved current ratings |
| UL 1077 |
DC 28 V / DC 72 V |
50 A – 125 A |
| CSA C22.2 No 235 |
DC 28 V |
50 A – 100 A |
| Bw — VG 95345, part 17 |
DC 28 V |
60 A – 100 A |
| Bw — LN 29808 |
DC 28 V |
80 A, 100 A |
| QPL (Canada, National Defence) — VG 95345, part 17 |
DC 28 V |
60 A – 100 A |
| QPL (Sweden Defence Admin.) — TL 5925-001 |
DC 28 V |
60 A – 100 A |
Note: Approvals apply to versions without auxiliary contacts and may depend on the selected rating and configuration.
