FNM-420U Sounders, uninterruptible

Name: FNM-420U Sounders, uninterruptible
Brand: Bosch Building Technologies

FNM-420U is an LSN alarm-sounder family providing synchronised audible notification and continued alarm signalling on an LSN stub, with output up to 101.3 dB(A).

HARDWARE FAMILY

Uninterruptible LSN Alarm-Sounder Family

CURRENT ACTIVE

CURRENT

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FNM-420U Sounders, uninterruptible: FNM-420U Sounders, uninterruptible official source

Source: FNM-420U Sounders, uninterruptible official source
Publisher: Bosch Building Technologies
Source date: Not stated in the record
Last checked: 1 Sept 2026
Scope: Official Product Page
Source availability: Link Only
Contradiction state: Not Published

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