Nascom N505A/STMPA300 Magnetic Pull-A-Part Contact with 25' Leads

Protect perimeter access points and critical assets with the Nascom N505A/STMPA300 magnetic pull-a-part contact — a rugged solution built for industrial security and continuous monitoring. This Nascom magnetic contact uses bar-stock anodized aluminum magnet housing and a tubed aluminum switch body filled with epoxy to keep the reed switch stable under vibration and impact. With 25' armored leads and a closed-loop contact, it enables long cable runs ideal for gates, commercial trailers and warehouse dock alarm systems while resisting tampering and environmental wear.

Designed to reduce false alarms and service calls, the N505A/STMPA300 supports typical low-voltage security circuits (rated to 200V DC and switching currents up to 1.5A) and integrates easily with alarm control panels and surveillance networks. Quick to mount and available with a high-security option, it delivers dependable door and gate protection where uptime matters. Upgrade your perimeter, trailer or dock protection with a magnetic contact built for heavy use — order now or contact our sales team to confirm compatibility with your security monitoring system.

• Built for continuous operation: anodized aluminum and epoxy-filled switch housing eliminate plastic failures and reduce maintenance
• Long 25' armored leads for flexible placement on gates, trailers and dock alarms without signal loss
• Tamper-resistant design with armored cable and robust reed protection to minimize false alarms and external damage
• Easy, fast installation and compatibility with closed-loop security circuits for quick integration into monitoring and surveillance systems
• Industrial-rated switching (up to 200V DC, 0.5–1.5A) and optional high-security configuration for demanding commercial installations