Schaltbau upgrades passenger alarm handle PAD 41 with extended inspection intervals and modular service concept
First introduced at the InnoTrans fair 2024, the PAD 41 passenger alarm handle has been developed as the direct successor to Schaltbau’s proven PAD 40 series to address increasing requirements from rail operators for longer inspection intervals, improved serviceability and greater functional flexibility. At the same time, PAD 41 maintains full mechanical compatibility with existing PAD 40 installations, so that devices can be replaced without reworking the mounting surface. This allows straightforward retrofitting in existing fleets as well as integration into new vehicle platforms.
A central enhancement of PAD 41 is its increased B10d value, which enables substantially extended inspection cycles for the passenger alarm handle. The B10d value, a reliability metric that describes the number of actuations at which fewer than 10% of devices are expected to experience failure, led to recommended inspection cycles of 6 months for PAD 40. With a B10d value of 30,000 actuations, the successor PAD 41 now supports inspection intervals aligned with regular vehicle maintenance cycles of two to three years, depending on operating conditions. As a result, both maintenance effort and vehicle downtime are reduced without compromising safety.
“Passenger alarm handles are rarely actuated in service, but they must function reliably after years of exposure. PAD 41 is designed for use in passenger rail vehicles where predictable inspection cycles, simplified maintenance and long-term reliability are critical selection criteria,” says Helmut Pusch, CEO of Schaltbau GmbH Group. “For operators, PAD 41 offers a clear transition path: a direct replacement for PAD 40 with no interface changes, but with measurable improvements in inspection cycles, service effort and configuration flexibility.”
PAD 41 introduces a modular design, in which housing components and handles can be replaced independently without fully dismantling the device. Maintenance is further simplified through maintenance-free plain bearings which do no longer require regular lubrication as well as plug-in bolt mounting for snap-action switches. In contrast to PAD 40, the PAD 41 supports up to four S826 or S870 snap-action switches.
Schaltbau’s PAD 41 passenger alarm handles are available in numerous customer-specific variants and options, including two housing designs (a classic version and a version with rounded outer edges), an emergency hammer with interlock hammer holder, LED indicator lights, individual labelling or an optional remote reset, allowing both manual reset and reset via electrical input.
Schaltbau is a global leader in DC power solutions, specializing in products and solutions that drive electrification across industries. With a broad portfolio of contactors, connectors, switches, and safety components, Schaltbau has been helping partners and customers solve challenges in rail for generations. Building on this legacy with its new brand Eddicy, they also develop cutting-edge solutions designed to meet the highest standards of safety and reliability for switching and protecting DC applications in energy and e-mobility. Headquartered in Munich, Germany, and supported by a global team of over 1,000 employees, Schaltbau continues to shape the future of electrification with nearly a century of expertise.