Name: MEAN WELL RQB150W12 series: Railway DC/DC converter - RQB150W12-110S54
Brand: MEAN WELL
SKU: RQB150W12-110S54
Price: 483.99 USD
Availability: InStock

MEAN WELL RQB150W12 series: Railway DC/DC converter - RQB150W12-110S54

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Description

RQB150W12-110S54 — Railway DC/DC converter

MEAN WELL RQB150W12-110S54 is a fully encapsulated quarter-brick isolated DC/DC converter with a 14–160 V DC input range and a single 54 V, 2.778 A output rated at 150 W. It provides remote ON/OFF, remote sense and output trimming for railway and industrial systems, with external circuits and thermal design selected for the installation.

Download MEAN WELL RQB150W12 Datasheet (PDF)
Download MEAN WELL EMI Testing Guidance (PDF)

RQB150W12 specifications, controls, thermal and mechanical drawings, EMC circuits and packing: PDF pages 28–36.

Electrical specifications

Model and output configuration	RQB150W12-110S54; isolated single-output DC/DC converter. The 110 code denotes nominal 110 V DC input and S denotes a single output.
Rated power	150 W, subject to the applicable input, load and thermal limits.
Output voltage	54 V DC
Output current	2.778 A
Minimum load	No minimum load required.
Nominal input voltages and input range	Nominal 24, 36, 48, 72, 96 and 110 V DC; operating input 14–160 V DC. The series is described as 12:1 wide input.
No-load and full-load input current	No load: 10 mA; full load: 1.55 A. Values are the model-selection table entries; general catalogue test conditions are stated below.
Typical efficiency	88%
Series capability reference	RQB150W12 series efficiency is up to 88%; use this model's typical efficiency and operating limits for selection.
Maximum capacitive load	1000 µF
Input filter and protection	Pi-type input filter; 15 A/250 V AC time-delay fuse.
Input surge voltage	200 V DC for 0.1 s maximum.
Setup time	300 ms maximum at 100% load and nominal input voltage.
Voltage accuracy	±1.0%
Ripple and noise	480 mVp-p; measured with 20 MHz bandwidth using a 12-inch twisted pair terminated with 0.1 µF and 47 µF capacitors.
Line and load regulation	Line: ±0.2%, low line to high line at rated load. Load: ±0.5%, measured from 0% to 100% rated load.
Switching frequency	250 kHz typical.
General measurement conditions	Unless separately specified: normal input 110 V DC, rated load, ambient 25°C and 70% RH.

Protection and control

Short-circuit protection	Continuous protection with automatic recovery.
Overload protection	120–200% of rated output power; automatic recovery after the fault condition is removed.
Overvoltage protection	110–150% of rated output voltage; latched shutdown.
Overtemperature protection	Thermal shutdown at +115°C; automatic recovery after the fault condition is removed.
Input undervoltage lockout	Specification: start-up 14 V; shutdown 12 V typical, 11.5 V minimum.
Remote ON/OFF control	Referenced to −Vin: ON with R.C. >3 V up to 12 V DC, or open circuit; OFF below 1.2 V DC, or short R.C. to −Vin.
Remote sense	Remote voltage sensing is provided through the positive and negative sense pins identified in the model pin table.
Output trim range and connection	±10% typical. Connect the external trim-up resistor between Trim and −Vout; connect the trim-down resistor between Trim and +Vout. Observe output power, current and thermal limits after adjustment.
Trim calculation coefficients	For 54 V nominal output: Vref=2.5 V; R1=206.1 kΩ; R2=10 kΩ; R3=82 kΩ. V′ is the target output voltage.
Trim resistor formulas	Use consistent kΩ units. Up: A=Vref×R1/(V′−Vref); Rtrim_up=A×R2/(R2−A)−R3. Down: A=(V′−Vref)×R2/Vref; Rtrim_down=A×R1/(R1−A)−R3.

Supply interruption and external energy storage

Hold-up circuit	Use the illustrated external R1, D1 and hold-up capacitor network for short supply interruptions. Select the capacitor network for input voltage and load; the listed hold-up times are circuit references, not bare-module guarantees. R1 is recommended as 25 Ω/10 W and must withstand the start-up pulse energy associated with the bus voltage and capacitance.
Vbus capacitor and operating regions	An approximately 220 µF/200 V electrolytic capacitor between Vbus and −Vin is necessary below 60 V DC input. Vbus supplies or absorbs transient power; the text states 70 V bus below 60 V input and Vbus=Vin above 64 V. The diagram marks the 60/64 V transition.
Hold-up capacitance at 10 ms	Table 2 reference, nominal Vin 24/48/72/96/110 V respectively: 1800/1800/1800/600/500 µF (S2). The nearby full-load 110 V example instead says 470 µF; use the table's 500 µF entry as the listed selection reference and confirm the implemented design with MEAN WELL.
Hold-up capacitance at 20 ms	Table 2 reference, nominal Vin 24/48/72/96/110 V respectively: 3600/3600/3600/1200/820 µF (S3).
Hold-up capacitance at 30 ms	Table 2 reference, nominal Vin 24/48/72/96/110 V respectively: 4800/4800/4800/1800/1200 µF (C2).

Thermal and environmental limits

Operating and case temperature	Working ambient: −40 to +90°C with derating; case temperature +115°C maximum. A graph extending beyond +90°C does not extend the stated working-temperature range.
Cooling and thermal design	Free-air/natural convection. Provide sufficient heat removal by conduction, convection and radiation for the actual installation; apply the model-specific derating curve and case-temperature limit.
Model-specific airflow derating	Use the separate RQB150W12-110S54 curve on PDF page 33, measured at 110 V DC. Four curves identify 20, 100, 300 and 500 LFM airflow. The allowable load varies with output model, airflow and ambient temperature; do not apply the series thermal example as a universal full-load boundary.
Thermal calculation reference	Pd=Pin−Po=Po×(1−η)/η; ΔT=Pd×Rca; Ta=Tc−ΔT. The catalogue example uses 12 V×12.5 A, η=0.87, Pd≈22.4 W and Rca=5.75°C/W, giving ΔT≈128.8°C. With an illustrative Tc=105°C it calculates Ta≈−23.8°C (about −25°C); it also describes about 50% load at 45°C. These are example assumptions, distinct from the +115°C case specification and the individual model/airflow curves.
Thermal test PCB	The illustrated thermal-test layout is 137×88×1.6 mm with 2 oz copper; a local copper-area reference is 58.5×37 mm. It describes the test layout and heat conduction through the module to the PCB, not an included circuit-board accessory.
Working and storage humidity	Working: 5–90% RH, non-condensing. Storage: −55 to +125°C and 10–95% RH, non-condensing.
Temperature coefficient	0.05%/°C over 0 to +65°C.
Soldering conditions	Measure 1.5 mm from the case: 3–5 seconds at 260°C maximum.
Operating altitude	4000 m.

Isolation, railway standards and EMC

Safety approvals	LVD IEC62368-1 and EAC TP TC 020/2011 approved.
Railway standards	EN50155 with the specified external circuits, including EN61373 shock/vibration and EN50121-3-2 EMC.
Isolation withstand voltage	Input–output: 3 kV AC; input–case: 1.5 kV AC.
Isolation resistance and capacitance	Input–output resistance: 1000 MΩ at 500 V DC, 25°C, 70% RH non-condensing. Isolation capacitance: 3000 pF typical.
EMC emissions	Conducted and radiated BS EN/EN55032 Class A/B require the corresponding external components and circuit. The suggestion circuits are referenced to 110 V DC input and full load; verify the complete equipment.
ESD and radiated immunity	BS EN/EN61000-4-2 Level 3, ±6 kV contact; BS EN/EN61000-4-3 Level 3, 10 V/m.
EFT and surge immunity	BS EN/EN61000-4-4 and -4-5 Level 3, ±2 kV on the power input port, with external input capacitance required: 100 µF/200 V ×3.
Conducted and magnetic immunity	BS EN/EN61000-4-6 Level 3; the table prints 10 V/m (r.m.s.). Magnetic-field BS EN/EN61000-4-8: Level 3, 10 A/m.
Class A external-component reference	Table entries: C1/C4 220 µF/200 V; C2/C3/C5/C6 0.68 µF/250 V; L1 2.0 mH; CY1/CY2 1000 pF/5 kV; grouped CY3/CY4/CY5/CY6 entry 1200 pF/3 kV ×5; C7 4.7 µF/100 V ×6. Preserve the listed grouped counts when confirming the implemented circuit.
Class A circuit connections	L1 is a choke in both input rails. CY1 couples module +Vin to +Vout and CY2 couples −Vin to −Vout. CY3/CY4 couple input rails to shielding ground; CY5/CY6 couple output rails to shielding ground. The case joins this shielding-ground network; C7 is across the output.
Class B external-component reference	Table entries: C1/C2/C7 100 µF/200 V; C3/C4/C5/C6/C8/C9 0.68 µF/250 V; L1/L2 2.0 mH; L3/L4 4.7 µH; CY1 2200 pF/5 kV; CY2 1000 pF/5 kV; grouped CY3/CY4/CY5/CY6 entry 2200 pF/3 kV ×4; CY7/CY8 470 pF/5 kV; C10 4.7 µF/100 V ×6.
Class B circuit connections	L1/L2 are two input choke stages; L3/L4 are in the positive/negative input rails. CY1/CY2 couple the module input rails to their corresponding output rails; CY7/CY8 bridge the earlier input stage to the respective output rails. CY3/CY4 and CY5/CY6 connect input/output rails to shielding ground, with the case as drawn. The diagram also includes CY9/CY10 at the earlier input stage, but the component table gives no values for them; obtain the complete selection from MEAN WELL.

Mechanical integration and product information

Construction and dimensions	Fully encapsulated quarter-brick module with industry-standard pinout; aluminum baseplate and plastic case. 57.9×36.8×12.7 mm (2.28×1.45×0.5 inches).
Pin assignment	1 +Vin; 2 UVLO; 3 Remote ON/OFF; 4 Vbus; 5 −Vin; 6 −Vout; 7 −S; 8 Trim; 9 +S; 10 +Vout. Use the drawing orientation when laying out and wiring the PCB.
Pin and mounting geometry	Pins 6 and 10: Ø1.5 mm; pins 1, 2, 3, 4, 5, 7, 8 and 9: Ø1.0 mm. Pin extension: 4.1 mm. Two M3 threaded through mounting inserts; bottom-view references are 50.8 mm between pin rows, 47.2×26.2 mm mounting-insert offsets, and output-row spans 15.24 mm with a 7.62 mm half-span.
Mechanical tolerances	Dimensions in mm: x.x ±0.5; x.xx ±0.25. The general pin-size note specifies 1.x ±0.1 mm.
Recommended PCB footprint	Top-view footprint: 58.4 mm minimum ×37.3 mm minimum, on a 2.54 mm grid. Mounting holes Ø3.5±0.12 mm; small-pin holes Ø1.4±0.18 mm; large-pin holes Ø1.9±0.12 mm. Follow the individual hole positions in the model mechanical drawing.
Unit mass reference	75 g per unit, catalogue PACKING reference; not a measured net or shipment weight.
Packing reference	11 units per tube, tube gross weight 955 g; 132 units in 12 tubes per carton, carton gross weight 12.5 kg. Tube length 520 mm and illustrated cross-section 60.9×26.9 mm; carton L545×W145×H220 mm.
Reliability and warranty	185 Khrs MTBF to MIL-HDBK-217F at 25°C; 3-year manufacturer warranty.
Typical applications	Bus, tram, metro and railway systems; telecom/datacom, wireless networks, industrial control, instruments and analyzers. The fully encapsulated design addresses vibration, dust and temperature exposure within the specified installation and operating limits.

Installation and system verification

Complete-system EMC verification	Verify EMC with the converter installed in the final equipment and connected to a representative load. Wiring, assembly and the application affect the result. Follow the model's specified EMC conditions and any required external components; the linked EMI testing guidance does not certify the finished equipment.