Seco-Larm SM-300Q/BR Surface-Mount N.O. Magnetic Contact with Screw Terminals, Brown
SKU
SM-300Q/BR
Model No
SM-300Q/BR
$3.15
Seco-Larm SM-300Q/BR Surface-Mount N.O. Magnetic Contact with Screw Terminals, Brown is available to buy in increments of 10
Product Highlights
- Surface-mount magnetic contacts
- Screw mount using side tabs
- Terminal cover provided (required for all applications)
- Contact reed switch is SPST, deactivated rhodium on gold under-plating for a longer expected life
- 1/2" (13mm) Gap

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The SM-300Q/BR from Seco-Larm is a surface-mount N.O. magnetic contact with screw terminals, designed for reliability and ease of installation. This device features a sturdy ABS plastic construction and includes a terminal cover for added safety, making it an ideal choice for various applications that require open loop circuits. With a 1/2" (13mm) gap and sold in multiples of 10, the SM-300Q/BR offers both performance and value.
Seco-Larm SM-300Q/BR Key Features
- Surface-mount magnetic contacts: Easy installation on any surface, allowing for versatile application in security systems.
- Screw mount using side tabs: Secure and stable mounting ensures long-term performance.
- Terminal cover provided: Required for all applications to enhance safety and reliability.
- Durable ABS plastic case: Features a lip to prevent accidental wire contact with metal mountings, along with slotted mounting holes for convenient gap adjustments.
- Contact reed switch: SPST with deactivated rhodium on gold under-plating for extended life and consistent performance.
- 1/2" (13mm) Gap: Suitable for various applications in open loop circuits.
- Included mounting screws: Everything needed for installation is provided, eliminating additional purchases.
Seco-Larm SM-300Q/BR Detailed Specifications
| Type | Surface-Mount N.O. Magnetic Contact |
| Gap Size | 1/2" (13mm) |
| Switch Type | SPST |
| Material | ABS Plastic |
| Terminal Cover | Included |
| Installation Method | Screw Mount |
| Sold In | Multiples of 10 pcs. (price is for 1 pc.) |
| UL Listed | Yes |
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