MEAN WELL RHP-8K1UT-48 is a 48 V, 1U rack power-supply system using matching RCP-1600-48 rectifiers. With all five module outputs in parallel, the catalogue maximum is 167.5 A / 8040 W, subject to input and temperature derating. It uses individual AC terminal blocks for the five bays and PMBus communication.
Product Datasheet
Download MEAN WELL RHP-1U Datasheet (PDF)
The RHP-1U section is on PDF pages 7, 8, 9, 10, 11, 12, 25, 26, 27, 28, 29, 30, 31, 32. Refer to the complete mechanical drawings and notes when planning installation.
Model and System Configuration
Complete model
RHP-8K1UT-48
Configuration
1U Rack Power Supply System; 1U / 19-inch format with five module positions. Nominal module voltage: 48 V.
AC connection version
T version: individual AC terminal blocks for the five bays.
Communication option
PMBus. The blank communication suffix denotes the catalogue PMBus version. CANBus is a separate by-request option, not an additional interface promised for this model.
Output module / rack
RCP-1600-48; rack RHP-1UT-A.
The bare rack and a populated system are different ordering configurations. Confirm the installed module quantity, voltage and communication interface for the ordered assembly. Module hot-plug capability does not remove the need to follow the manufacturer’s installation and service instructions.
Main Output and Capacity
DC output voltage
48 V.
Rated output current
167.5 A maximum for the five-module parallel configuration.
Rated output power
8040 W maximum for the five-module parallel configuration.
Rack expansion
Active current sharing is supported. The series describes up to three RHP power racks in parallel, nominally up to 24 kW; the selected voltage model, actual module count and all derating limits determine usable capacity.
Parallel-load conditions
All module outputs are paralleled. At light load, ripple may exceed the normal specification; the note indicates normal ripple after the load exceeds 5%. If unequal current sharing causes a module overload at full load, the rack note recommends reducing total output current by 10%.
The 8K model identifier is the capacity class. It does not change this voltage model’s printed maximum power.
Input, Cooling and Operating Limits
Input voltage / frequency
90–264 VAC or 250–370 VDC; AC frequency 47–63 Hz. Match the input supply to the actual installed RCP-1600 module rating and apply low-line derating.
Per-module AC current
15 A at 115 VAC; 8.5 A at 230 VAC. These figures are per module, not the total current of a five-module rack.
Per-module leakage current
Less than 1.5 mA at 230 VAC per rectifier or charger. Total system leakage depends on the number of installed modules.
The installed RCP-1600 rectifiers provide active PFC, fan cooling and the voltage-specific protections listed below. Keep the module and rack airflow paths clear and match the supplied module revision to its ratings.
The rack working-temperature range is −30 to +70°C, with derating. Low-line and ambient limits must both be observed; this range is not a full-load guarantee at every input voltage or temperature. Use the derating curve of the actual installed module revision. The RCP rectifier curve must not be used as an RCB charger curve.
Unless otherwise stated, rack specifications are measured at 230 VAC, rated load and 25°C. Ripple measurements use 20 MHz bandwidth and a 12-inch twisted pair terminated by 0.1 µF and 47 µF capacitors in parallel.
Selected RCP-1600 Rectifier Specifications
Per-module output
RCP-1600-48: 48 V, 33.5 A and 1608 W. These are individual-module ratings; total rack capacity is specified separately.
Module ripple / regulation
Ripple and noise: 300 mVp-p. Voltage tolerance ±1%; line regulation ±0.5%; load regulation ±0.5%. Apply the measurement method and parallel-load conditions above.
Local voltage adjustment
47.5–58.8 V by the module SVR when digital communication and PV/PC control are not being used.
Module efficiency / power factor
Typical efficiency 93%; typical power factor 0.97 at 230 VAC and full load. Typical cold-start inrush current: 35 A at 230 VAC.
Module timing
Set-up / rise: 1500 / 60 ms at 230 VAC and full load. Hold-up: 16 ms at 75% load or 10 ms at full load, at 230 VAC.
Module overload / short circuit
105–115% of rated current: constant-current limiting, followed by output shutdown after 5 seconds; re-power to recover.
Module overvoltage protection
63–75 V: output shutdown; re-power to recover.
Module overtemperature protection
Output shutdown; automatic recovery after the temperature falls.
Low-output-voltage shutdown
If output voltage remains below 80% of the set value for 5 seconds, the module shuts down; re-power to recover.
Module input derating at 60 Hz
180–264 VAC: 1608 W / 33.5 A per module; 115 VAC: 1286.4 W / 26.8 A per module; 100 VAC: 1125.6 W / 23.45 A per module; 90 VAC: 964.8 W / 20.1 A per module. Observe both input and thermal derating.
Module thermal curve
Horizontal mounting at 230 VAC: 100% rated load through 50°C, falling to 50% at 70°C. The rack working range remains −30 to +70°C; do not extend rack operation using a module-only temperature limit.
Module control selection
External PV/PC control applies when PMBus/CANBus control is not operating. Use the rack-system high-voltage limit of 75% rated current at 125% nominal voltage, even though the individual-module curve shows 80% at that point.
Module connector reference
RCP-1600 module connector: Positronic PCIM34W13M400A1; mating connector: PCIM34W13F400A1. This module interface is separate from the rack CN1/CN2 signal connectors; extra loose connectors are not stated as included.
These rectifier values are from the RCP-1600 module specification dated 2026-03-04. Confirm the installed module version; retain the rack-system limits wherever they are more restrictive. The RCP protection thresholds and curves are not specifications for an RCB charger.
Programming and Application-Specific Sensing
Voltage programming PV
40–125% of nominal output voltage. CN1 pin 26, referenced to −V(signal) on pin 24.
Current programming PC
20–100% of rated current; CN1 pin 25, referenced to −V(signal) on pin 24.
External-control curves
The diagrams mark the relationships non-linear and show a transition at 0.4 V. For the controlled portion, 1 V corresponds to the minimum PV output and 4.7 V to 125% nominal output; PC is 20% at 1 V and 100% at 4.7 V. Follow the full curve rather than assuming one linear conversion.
Power-system voltage / current limit
The power-system curve allows 100% rated current through 100% nominal output voltage and reduces it to 75% at 125% nominal voltage. This is a rectifier-system curve, not a charger-system curve.
Remote / local sense
Power-system CN2: pin 1 +S, pin 2 −S, pin 3 +V(signal), pin 4 −V(signal). Remote compensation is up to 0.5 V; connect +S/−S at the load and twist the pair. For local sensing, link pins 1–3 and 2–4. Signal terminals must not carry load current.
CN1 Control and Status
Connector and mating parts
Rack CN1: HRS DF11-26DP-2DS. Mating housing: HRS DF11-26DS or equivalent. Contact-family reference: HRS DF11-**SC or equivalent; specify the full contact variant for the selected wire assembly.
Module signal groups
For modules A / B / C / D / E respectively: AC OK pins 1 / 5 / 9 / 13 / 17; DC OK pins 2 / 6 / 10 / 14 / 18; remote ON/OFF pins 3 / 7 / 11 / 15 / 19; T-Alarm pins 4 / 8 / 12 / 16 / 20.
AC OK
High 3.5–5.5 V when input is at least 87 Vrms; low −0.5 to +0.5 V when input is at most 75 Vrms. Maximum sourcing current 10 mA; output signal only.
DC OK
For a power system, high indicates output at or below 80% ±5% of the output reference, and low indicates output at or above that threshold. High is 3.5–5.5 V; low is −0.5 to +0.5 V. Maximum sourcing current 10 mA; output signal only.
Remote ON/OFF
Connect the relevant module remote pin to +5V-AUX on pin 21: short / 4.5–5.5 V for ON; open / 0–0.5 V for OFF. Maximum input is 5.5 V. Control the module channels separately or together as shown in the diagram.
Temperature / fan alarm
T-Alarm is high 3.5–5.5 V when the internal temperature exceeds the alarm limit or a fan fails; low −0.5 to +0.5 V during normal temperature and fan operation. Maximum sourcing current 10 mA; output signal only.
Auxiliary outputs
Pin 21: +5V-AUX, 4.5–5.5 V at up to 0.3 A. Pin 23: +12V-AUX, 10.8–13.2 V at up to 0.8 A. Both reference pin 22 GND-AUX, have built-in ORing diodes and remain independent of remote ON/OFF.
Signal references
AC OK, DC OK, T-Alarm and remote control are isolated signals referenced to GND-AUX. Pin 22 is isolated from the main +V/−V output. Pin 24 −V(signal), pin 25 PC and pin 26 PV are non-isolated; pin 24 is a control/local-sense reference, not a load terminal.
Communication, CN2 and Status Indicators
CN2 mating parts
Rack CN2: HRS DF11-4DP-2DS; mating housing HRS DF11-4DS or equivalent, with contacts selected from HRS DF11-**SC or equivalent. Use the power-system or charger-system pin assignment appropriate to the installed modules.
JK1 RJ45 pin map
1 DA and 2 DB: differential parallel-control signals; 3 −V(signal): their non-isolated reference, not a load connection. Pin 4 CONTROL: PMBus remote ON/OFF signal, isolated and referenced to GND-AUX. Pin 5: NC / reserved. Pin 8: GND-AUX, isolated from the main output.
JK1 selected communication pins
PMBus version: pin 6 SDA; pin 7 SCL. The catalogue specifies PMBus revision 1.1 with maximum 100 kHz clock for reading operating status and controlling configured functions.
Communication connection
The RJ45 connector carries the assigned power-system control bus; it is not an Ethernet interface. Select the correct bus wiring and address-switch settings for the system.
Status LEDs
For power operation, green indicates normal operation; constant red indicates an abnormal condition such as overtemperature, overload or fan failure. Flashing red at 60°C internal temperature is an early warning while operation continues, not an ambient-temperature rating or immediate OTP shutdown; the catalogue also describes a PMBus alarm indication.
Dimensions, Installation and Supply
Dimensions
365 × 440 × 44 mm (L × W × H) without brackets; 365 × 482.6 × 44 mm with rack brackets. Case 242A; general drawing tolerance ±0.5 mm.
Rack mounting
Follow the case drawing and bracket positions. Mounting holes marked 1 use M4 screws, maximum penetration 4 mm and recommended torque 7–10 kgf·cm. The drawing shows five side mounting positions on each side.
DC output connections
The mechanical drawing specifies M8 × L16 output fasteners. The M4 mounting torque is not a tightening specification for the DC output fasteners; follow the supplied assembly instructions.
AC connection
Each module bay has separate AC terminals. The rear-view drawing identifies FG, N and L in that order for each terminal group. Connect protective earth and size conductors for the installed modules.
Airflow / service
Preserve the airflow path through the plug-in modules and the rear of the rack. Follow the mechanical drawing, module insertion orientation and hot-plug servicing instructions.
Supply configuration
Specify the rack input style, communication option and matching module population. The connector mating housings and contacts are selection references; extra loose mating parts, AC leads and rack installation hardware are not stated as included.
Confirm the mass of the exact supplied rack or populated assembly when planning installation and shipping. No configuration-specific mass is assigned here.
Environment, Insulation and EMC
Working / storage
Working: −30 to +70°C with applicable derating, 20–90% RH non-condensing. Storage: −40 to +85°C, 10–95% RH non-condensing.
Temperature coefficient / altitude
±0.03%/°C over 0–50°C. Above 2000 m, the catalogue requires 5°C lower allowable ambient per 1000 m for fan-cooled models. This derating note does not by itself establish a maximum operating altitude.
Vibration
10–500 Hz, 2 G, 10 minutes per cycle and 60 minutes along each X, Y and Z axis.
Catalogue safety standards
UL 62368-1; CAN/CSA C22.2 No. 62368-1; TUV BS EN/EN 62368-1; EAC TP TC 004. Select the applicable system/module configuration; final equipment requires its own compliance assessment.
Dielectric withstand
Input–output: 3 kVAC; input–FG: 2 kVAC; output–FG: 1.5 kVAC.
Insulation resistance
100 MΩ at 500 VDC, 25°C and 70% RH for input–output, input–FG and output–FG.
Emissions
BS EN/EN55032 (CISPR32): conducted Class B and radiated Class A. Harmonic current: BS EN/EN61000-3-2; voltage flicker: BS EN/EN61000-3-3. The power-system table specifies harmonic Class A.
Immunity
BS EN/EN55035 and BS EN/EN61000-6-2; EN61000-4-2 / -3 / -4 / -5 / -6 / -8 / -11. Power-system levels: ESD 8 kV air / 4 kV contact; radiated RF level 3; EFT/burst level 3; surge level 4, 2 kV line–line / 4 kV line–earth; conducted RF level 3; magnetic field level 4.
Final-equipment EMC
Rack EMC tests use a 1000 × 1300 × 1 mm metal plate. The rack supply is a component for installation in final equipment, which must be checked again for EMC compliance.
Manufacturer document / warranty
RHP-1U rack-system specification dated 2024-09-04; the catalogue lists a 5-year manufacturer warranty.
The power-system immunity table specifies input dips greater than 95% for 0.5 period, 30% for 25 periods, and interruptions greater than 95% for 250 periods.
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