Bosch D135A Low-Battery Disconnect Module

Keep your security and surveillance systems reliable during prolonged AC outages with the Bosch D135A low-battery disconnect module. This control panel module automatically disconnects the battery at 9.5 VDC to prevent deep discharge, extending battery service life and helping avoid unexpected system failures in critical monitoring and alarm applications. Engineered for direct compatibility with Bosch panels (B6512, B5512/B5512E, B4512/B4512E, B3512/B3512E), the D135A supports standard 12V DC backup batteries (1 x 7Ah or 1 x 18Ah) and installs quickly inside existing enclosures, minimizing labor and downtime. With a compact footprint and a maximum operating temperature of 50°C, it performs reliably in a variety of commercial security environments. Ideal for integrators and facility managers who need dependable battery protection for access control, intrusion detection, and surveillance systems. Add the Bosch D135A to your next installation to safeguard battery health, reduce lifecycle costs, and maintain continuous monitoring. Order now or contact your Bosch distributor to specify the D135A for your control panel installation.

• Protects system uptime by preventing deep battery discharge during extended AC outages, keeping security and monitoring networks operational
• Automatic disconnect at 9.5 VDC to preserve battery life and reduce maintenance and replacement costs
• Designed for seamless integration with Bosch control panel modules (B6512, B5512/B5512E, B4512/B4512E, B3512/B3512E) for reliable compatibility
• Compact, easy-to-install 12V DC module that fits inside control panel enclosures to simplify installations and service
• RoHS-compliant, high-temperature rated (up to 50°C) for dependable performance in varied installation environments