ThyssenKrupp Citia BOS Stairlift 33VDC Battery Charger Power Supply

33V DC power supply with flying leads designed as a compatible replacement for legacy #470139M & #470139 used in Citia SWL battery charging systems.

This AC-to-DC switching power supply provides regulated 33V DC output suitable for stairlift battery charger applications where the original charger used a hard-wired output connection.
The unit is supplied with factory flying leads, allowing reuse of the original charger plug to maintain proper interface with the existing stairlift wiring harness. This makes it well-suited for servicing discontinued or hard-to-source legacy charger assemblies while preserving the original connector geometry required by the lift system.

The output leads are intentionally unterminated to support direct integration with the existing charger plug removed from the original unit. This approach allows the replacement power supply to match the original connection style without altering the stairlift’s onboard wiring or control components. 

• Input voltage: 100V - 240 VAC (switching design)
• Output voltage: 33 VDC regulated
• Output current: 1.0 A
• Output style: factory flying leads
• Application: stairlift battery charger replacement
• Form factor: external AC-to-DC power supply
• Overload, Short Circuit, and Over Temperature Protection
• 100% Hi-POT tested and Cycling Burn-In

For compatibility, the original charger’s plug end must be retained and electrically connected to the flying leads of this power supply. To ensure correct polarity, continuity, and safe operation, installation and connector transfer should be performed by a qualified electrician or appropriately trained professional. Proper installation helps ensure reliable performance and long-term system integrity.