BLASI – Bridge rectifier B 80 70-25
BLASI – Bridge rectifier B 80 70‑25 is a single‑phase, 4‑diode bridge rectifier module used in BLASI automatic‑door and barrier power supplies to convert 230 V AC mains into rectified DC for internal electronics. The “B 80 70‑25” marking corresponds to a glass‑passivated, 25 A capable, 200 V rated bridge (e.g., FB2502‑B80/70‑25 style) with radial leads or screw terminals, mounted either on a PCB or on a small heatsink. It is rated for typical mains voltages (around 230 V AC) and handles rectified DC currents up to about 25 A average, suitable for BLASI control‑board power sections or auxiliary power supplies.
Product Details
The BLASI – Bridge rectifier B 80 70‑25 serves as the main AC/DC conversion stage in BLASI door‑control or barrier cabinets that run from single‑phase AC mains. Internally it consists of four silicon diodes in a full‑wave bridge configuration, turning the AC input into a pulsating DC that is then smoothed by downstream capacitors and regulators on the BLASI PCB. The “B 80 70‑25” designation indicates a 200 V reverse‑voltage rating (VRRM ≈ 200 V), roughly 70 V RMS AC input capability, and around 25 A average forward current (IF(AV)), which is sufficient for typical BLASI auxiliary power supplies feeding 24 V DC control boards, relays, and small drives.
In BLASI panels this bridge rectifier is usually mounted directly on the main power‑board or on a small metal baseplate/heatsink so heat from the diode drops can dissipate efficiently. Some versions use radial or screw‑type terminals, making them suitable for both PCB‑mounting and point‑to‑point wiring in the cabinet. The glass‑passivated or epoxy‑encapsulated design offers good electrical insulation and mechanical robustness, which is important in dusty, vibration‑sensitive BLASI installations. By using the BLASI – Bridge rectifier B 80 70‑25, BLASI gets a compact, standardized power‑conversion block that reliably converts AC mains to DC while supporting the required current and surge capability for automatic‑door and barrier electronics.
Article No: 8330050
Additional information
| Brand | BLASI |
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