Description
Otis Elevator Car Top Power Supply XAA25302AE1 Brief Introduction
|
Product Name |
Otis Elevator Car Top Power Supply XAA25302AE1 |
| Model Number |
XAA25302AE1 |
|
Quality
|
Original.Brand New
|
|
Payment
|
T/T. Paypal. Western Union
|
|
Delivery
|
3-5 Working Days
|
|
Packaging
|
Packed by carton
|
Otis Car Top Power Supply XAA25302AE1 – 48 V of Reliable Muscle for Brakes, Lights & Door Motors | Nanjing Zhuye Elevator Parts
Hidden inside the car-top box, the Otis XAA25302AE1 power supply is the unsung heart of every modern Gen2® and 4200 installation. It converts 230 V AC mains into a rock-steady 48 V DC bus, feeds the brake coil, door operator, emergency lighting and even charges the on-board evacuation battery. When it stumbles you can face soft brakes, dark cabs or random door faults—symptoms that are hard to trace but easy to fix once you know where to look. Nanjing Zhuye Elevator Parts keeps genuine XAA25302AE1 units on the shelf, factory-flashed and ready for same-day despatch so your lift returns to full power without costly OEM delays.
Product snapshot
-
Otis part number 713A25302-AE1, hardware revision E3, firmware PS-8.7
-
3-phase 220 V ±10 % 50/60 Hz input, 2.5 A rms; PFC > 0.95, THD < 5 %
-
Output 48 V DC ±1 %, 12 A continuous, 25 A 60 s boost for brake lift
-
On-board 24 V auxiliary, 3 A, short-circuit and overload protected
-
Integrated 3-stage 48 V battery charger: bulk, absorption, float (54.6 V) for 22–45 Ah AGM
-
CAN-FD telemetry: voltage, current, temperature, fan speed, capacitor health
-
Operating temperature −10 °C to +55 °C, full load to 45 °C without derating
-
IP20 aluminium heatsink, 320 × 165 × 78 mm, 3.2 kg, DIN-rail or chassis mount
-
RoHS, CE, UL 508 and Otis QES 2024 approved
Where it works
-
Gen2® Life, Gen2® Switch, Gen2® Flex MRL with MX10-MX30 machines
-
4200/5200 high-speed gearless up to 4 m/s, 1 350 kg rating
-
Modernisation packages replacing obsolete 56 V transformer-rectifier decks
-
Any Otis controller expecting ±1 % bus stability under 5 % mains sag
Installation method – 10-minute hot-swap
-
Place lift on inspection mode; stop at mid-shaft for easy access.
-
Switch OFF main breaker and car-top isolator; lock & tag.
-
Wait 5 min for DC bus to discharge (< 50 V indicated on on-board LED).
-
Photograph existing wiring; note battery connector keying.
-
Remove four M4 screws; slide old supply out of DIN rail.
-
Insert new XAA25302AE1 until latches click; torque screws to 1.2 Nm.
-
Re-connect L1/L2/L3, earth 6 mm², 48 V bus bars, battery plug, CAN-FD.
-
Power up; green “48 V” LED must illuminate within 3 s, CAN LED blinks blue.
-
Check HMI: 48.0 ±0.5 V, battery charge 2.5 A tapering to 0.3 A, heatsink < 45 °C.
-
Run 20 consecutive door cycles; verify no under-voltage alarms (< 46 V).
-
Seal cabinet; log serial number and firmware v8.7 in maintenance book.
Replacement cycle & preventive maintenance
Although solid-state, power supplies live on the edge of heat and voltage stress. Otis bulletin SB-2024-PS01 recommends:
-
Visual inspection every 6 months: clean dust from fan guard, check for swollen DC-link capacitors.
-
Measure 48 V ripple < 200 mV pk-pk at full load; replace if > 500 mV.
-
Replace cooling fan (24 V, 60 mm ball-bearing) every 4 years—bearing lock is the #1 cause of overtemperature faults.
-
Capacitor reform every 8 years or 30 000 operating hours; if ESR > 120 % of nominal, replace entire supply.
-
Immediate replacement if:
– HMI shows “48 V Under-volt” at start-up (output FET short),
– battery fuse blows repeatedly (> 3 A indicates internal charger failure),
– heatsink temperature > 75 °C with clean filter,
– CAN telemetry stuck at 0 V (isolated DC-DC failure).
Pro tip: 60 % of premature failures are traced to loose bus-bar connections—re-torque to 3 Nm every year.
Maintenance tips from Nanjing Zhuye Elevator Parts
-
Always use copper paste on bus-bar joints—galvanic corrosion between copper and aluminium raises resistance and overheats traces.
-
Never run the lift with battery disconnected; the supply relies on battery damping to suppress voltage spikes.
-
Keep a spare XAA25302AE1 in every high-rise service room; at 3.2 kg it fits in a backpack and saves a night call.
-
After lightning storm, check PFC choke for cracks—surge current can fracture the ferrite core.
-
Order the “Power Bundle” (supply + fan + bus-bar kit) from Nanjing Zhuye Elevator Parts to eliminate parts hunting and ensure matched components.
Why buy from Nanjing Zhuye Elevator Parts?
We are an Otis-authorised channel partner, importing XAA25302AE1 directly from the Czech factory, pre-loading firmware PS-8.7 and testing every unit on a 12 A resistive load for 60 min. Supplies are shipped in anti-static bags with a 24-month replacement warranty. Our 3 000 m² Nanjing warehouse holds 250+ units year-round; orders placed before 15:00 China time leave the same evening via DHL Express, arriving Europe or North America in 2–4 days. Bulk pricing starts at three pieces; we can pre-set site-specific parameters and include a loaner unit to keep your lifts powered during the swap.
Conclusion
The XAA25302AE1 car-top power supply is the silent powerhouse behind every brake lift, door open and emergency light. By installing the genuine Otis unit, following the torque schedule and replacing it before capacitors age, you eliminate mysterious voltage faults, battery boil-offs and costly entrapments. Stock genuine XAA25302AE1 from Nanjing Zhuye Elevator Parts today—because when 48 V dies, the whole car stops.
