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Honeywell B401

S300 Series Detector Base

MPN: B401
Category: Honeywell Building Sensors & Detectors

Price and lead time confirmed within 1 business day

Discontinued by Honeywell — we can still source the original B401 (new, used or refurbished, subject to availability). Request a quote below.

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12-month warranty (new) · 3-month (used/refurbished)
30-day returns, no restocking fee on unused parts
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Have spare Honeywell parts? We buy surplus →

What is the Honeywell B401?

B401 plug-in detector bases are used with System Sensor® conventional S300 smoke and heat detectors. These bases make detectors more versatile than equivalent direct-wired models. B401 bases are intended for use in 2-wire systems, with screw terminals provided for power and remote annunciator connections.

Honeywell NOTIFIER, System Sensor B401 — B401 plug-in detector bases are used with System Sensor® conventional S300 smoke and heat detectors. These bases make detectors more versatile than equivalent direct-wired models. Discontinued by Honeywell — no longer in the current range. PartnerPLC sources new, surplus and discontinued Honeywell parts — request a quote for price, condition and lead time.

Specifications

Product

Lifecycle	Discontinued by Honeywell
Brand line	NOTIFIER, System Sensor

Others

Brand

NOTIFIER, System Sensor

Ordering codes

Part numbers on this product page

B401, B401 SD, B401-NTF, B401-SS, B401., B401.., B401DG, B401DGF, B401DGR, B401DGR1000, B401DGSD, B401L, B401LI, B401R, B401RM1000, B401RM470, B401RN, B401RSD

B401: frequently asked questions

Can I still buy the B401 now that it is discontinued?

Yes. Honeywell has discontinued the B401, but sourcing discontinued parts is what PartnerPLC specialises in — new old stock, used and refurbished units. Request a quote and we'll confirm availability, condition and lead time.

When can B401 be shipped?

B401 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up B401 in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for B401 and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for B401, subject to availability and destination.