Allen-Bradley 440N-Z21S16A - Allen Bradley Non Contact Switch Sensaguard Plastic 18Mm Barrel, 16A

Allen-Bradley 440N-Z21S16A is a non-contact safety switch from the Sensaguard line, built in a compact plastic 18mm barrel for versatile mounting in demanding industrial environments. This device delivers reliable, wear-free sensing without the mechanical contact that wear‑limits traditional interlocks, making it a smart choice for long-term safety circuits in busy facilities.

• Non-contact safety sensing reduces moving-part wear and maintenance needs while delivering dependable safety interlock performance in guarded equipment.
• 18mm plastic barrel offers a slim, adaptable footprint for compact panel layouts and easy retrofits in existing installations.
• 16A switching capacity supports typical control circuits in industrial panels, machinery, and automation systems, enabling straightforward integration without overloading the circuit.
• Industrial-grade reliability designed to perform in the rigors of manufacturing plants, process equipment environments, and retrofit projects where proven Allen-Bradley components are preferred.
• Versatile applications ideal for control panels, machinery safeguarding, and safety upgrades across commercial facilities and industrial automation setups.
• Easy sourcing for maintenance and upgrades part numbers like 440N-Z21S16A are favored for replacement and spare-part strategies, helping keep critical lines running with compatible, hard-to-find Allen-Bradley parts.

This model is especially well-suited for maintenance, repair, and upgrade projects where a compatible, non‑contact Sensaguard solution is required to modernize guarding systems without major rework. Use it to upgrade aging safety interlocks in control panels or retrofit new safety logic into existing machinery—delivering safer operation with a streamlined installation that aligns with industrial automation standards.

Key details at a glance

• Brand: Allen-Bradley
• Model: 440N-Z21S16A
• Type: Non-Contact Switch Sensaguard
• Barrel: Plastic 18mm
• Amperage: 16A
• Applications: Control panels, machinery, and industrial automation systems
• Typical use: Industrial plants, commercial facilities, process equipment, retrofit projects

Whether you’re refreshing a fleet of machines, upgrading safety guarding, or stocking up for planned maintenance, the Allen-Bradley 440N-Z21S16A delivers a dependable, long‑lasting non-contact solution that aligns with established safety practices and supports efficient, downtime-conscious operation.