Equivalent & Substitute Parts Reference: RBQ-12/33-D48NBS-C

Part Overview

RBQ-12/33-D48NBS-C is an intermediate bus DC-DC converter from Murata Power Solutions Inc., designed for commercial ITE applications. The unit offers a single output of 11.85V at up to 33A, supports an input voltage range of 36V to 75V, and provides 391 W output power with high efficiency and through-hole mounting in a 1/4 brick 5-DIP module. The product has reached obsolete status, requiring selection of alternative models for ongoing designs and inventory fulfillment.

Key Parameters

Manufacturer Part Number	Manufacturer	Category	Packaging	Number of Outputs	Voltage - Input (Min)	Voltage - Input (Max)	Voltage - Output 1	Current - Output (Max)	Power (Watts)	Voltage - Isolation	Applications	Features	Operating Temperature	Efficiency	Mounting Type	Package / Case	Size / Dimension	Product Status
RBQ-12/33-D48NBS-C	Murata Power Solutions Inc.		-	1	36V	75V	11.85V	33A	391W	2.25kV	ITE (Commercial)	Remote On/Off, OCP, OTP, SCP, UVLO	-40°C ~ 85°C	96%	Through Hole	5-DIP Module, 1/4 Brick	2.30" L x 1.45" W x 0.50" H	Obsolete

Substitute Part Grouping Explanation

Substitute parts are selected based strictly on the alignment of key electrical and mechanical parameters relevant to intermediate bus DC-DC converters for ITE (commercial) applications. Required matching parameters include input and output voltage ranges, maximum output current, output power rating, isolation voltage, mounting method, package type, dimensions, supported features, and operational temperature range. Only parts with equivalent or higher specifications within these criteria are considered valid substitutes.

Relevant key parameters for substitution:

Input Voltage Range (Min & Max)
Output Voltage & Current
Output Power
Isolation Voltage
Mounting Type
Package / Case
Features
Operating Temperature Range
Efficiency

Parameter Comparison

Manufacturer Part Number	Manufacturer	Number of Outputs	Voltage - Input (Min)	Voltage - Input (Max)	Voltage - Output 1	Current - Output (Max)	Power (Watts)	Voltage - Isolation	Applications	Features	Operating Temperature	Efficiency	Mounting Type	Package / Case	Size / Dimension	Product Status
RBQ-12/33-D48NBS-C	Murata Power Solutions Inc.	1	36V	75V	11.85V	33A	391W	2.25kV	ITE (Commercial)	Remote On/Off, OCP, OTP, SCP, UVLO	-40°C ~ 85°C	96%	Through Hole	5-DIP Module, 1/4 Brick	2.30" L x 1.45" W x 0.50" H	Obsolete
DVQ0135V2NBSC	Murata Power Solutions Inc.	1	36V	75V	12V	35A	420W	2.25kV	ITE (Commercial)	Remote On/Off, OCP, OTP, OVP, SCP, UVLO	-40°C ~ 85°C	95.2%	Through Hole	16-DIP Module (15 Leads), 1/4 Brick	2.30" L x 1.45" W x 0.52" H	Active

Engineering Selection Recommendations

RBQ-12/33-D48NBS-C is obsolete. Substitute selection should prioritize active product status, available inventory, and provided compliance information such as RoHS and REACH status. DVQ0135V2NBSC is listed as ROHS3 compliant and currently active. Part certifications and compliance (including REACH and ECCN status) support usage in regulated environments as specified in the provided data.

Frequently Asked Questions (FAQ)

Q: What input and output voltage ranges must a substitute match for the RBQ-12/33-D48NBS-C?
A: Substitute models must provide a 36V to 75V input range and an output voltage close to or matching the original 11.85V specification.

Q: Is the output current and power rating critical for selecting DC-DC converter substitutes?
A: Output current and power specifications must be equivalent or higher than the original (33A, 391W) to ensure compatibility.

Q: What package or mounting type is required for full mechanical compatibility?
A: Through hole mounting and a 1/4 brick module format are required. Dimensional variance must remain within the stated size ranges.

Q: Are feature sets and protections relevant to substitution?
A: Features such as remote on/off, overcurrent, overtemperature, and short circuit protection must be supported, matching the original unit's functionality.

Q: What certifications or environmental compliance are required?
A: Substitute selection should comply with the specified RoHS, REACH, and ECCN designations provided in the input parameters.

Q: How does an obsolete status affect substitution?
A: Obsolete status requires selecting an active part with matched specifications for ongoing or new designs.

Q: Can the substitute part DVQ0135V2NBSC provide equivalent mechanical fit?
A: DVQ0135V2NBSC uses a 1/4 brick format with nearly identical dimensions as the original, supporting direct replacement in compatible PCB layouts.

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