Equivalent & Substitute Parts Reference for ULS-12/8.3-D48NM-C

Part Overview

The Murata Power Solutions Inc. ULS-12/8.3-D48NM-C is an isolated module DC-DC converter, delivering 12V at up to 8.3A output from a 36V–75V input range, with 100W output power. Mechanical form factor is 8-SMD Module, 1/16 Brick, supporting ITE (Commercial) applications. The product is designated obsolete, necessitating selection of substitute parts meeting identical electrical, mechanical, and compliance parameters.

Key Parameters

Manufacturer Part Number	Type	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	Control Features	RoHS Status	MSL
ULS-12/8.3-D48NM-C	Isolated Module	1	36V	75V	12V	8.3A	100 W	2.25 kV	ITE (Commercial)	Remote On/Off, OTP, OVP, SCP, UVLO	-40°C ~ 85°C	92%	Surface Mount	8-SMD Module, 1/16 Brick	1.30" L x 0.90" W x 0.40" H (33.0mm x 22.9mm x 10.2mm)	Enable, Active Low	RoHS Compliant	3 (168 Hours)

Substitute Part Grouping Explanation

Substitutes are determined strictly by the following key parameters: input voltage range, output voltage and current, output power, isolation, module type, number of outputs, mounting/interface, efficiency, operating temperature range, physical dimensions, control features, and compliance status (RoHS, MSL, certifications). Direct equivalents require identical values for these parameters.

Parameter Comparison

Parameter	ULS-12/8.3-D48NM-C (Murata Power Solutions Inc.)	CPT8B48NS (Semiconductor Circuits, Inc.)
Type	Isolated Module	Isolated Module
Number of Outputs	1	1
Voltage - Input (Min)	36V	36V
Voltage - Input (Max)	75V	75V
Voltage - Output 1	12V	12V
Current - Output (Max)	8.3A	8.3A
Power (Watts)	100 W	100 W
Voltage - Isolation	2.25 kV	2.25 kV
Applications	ITE (Commercial)	ITE (Commercial)
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C (With Derating)
Efficiency	92%	93%
Mounting Type	Surface Mount	Surface Mount
Package / Case	8-SMD Module, 1/16 Brick	Sixteenth Brick
Size / Dimension	1.30" L x 0.90" W x 0.40" H (33.0mm x 22.9mm x 10.2mm)	1.30" L x 0.90" W x 0.41" H (33.0mm x 22.9mm x 10.3mm)
Control Features	Enable, Active Low	Enable, Active Low
RoHS Status	RoHS Compliant	ROHS3 Compliant
MSL	3 (168 Hours)	1 (Unlimited)

Engineering Selection Recommendations

The ULS-12/8.3-D48NM-C is designated obsolete. The CPT8B48NS meets all critical electrical and mechanical parameters and maintains RoHS compliance, with a lower moisture sensitivity level (MSL 1). The CPT8B48NS holds recognized agency approvals (CSA, TUV, UL) per provided data. Selection should be based on provided compliance, product status, and certifications.

Frequently Asked Questions (FAQ)

Q: What criteria are used to determine a direct substitute for ULS-12/8.3-D48NM-C?
A: Substitution requires identical values for input voltage, output voltage and current, output power, isolation rating, module/package type, number of outputs, control features, mounting type, physical dimensions, and compliance (RoHS, MSL).

Q: Are the sizes and footprints of ULS-12/8.3-D48NM-C and CPT8B48NS matched for direct mechanical replacement?
A: Both use the Sixteenth Brick (1.30" x 0.90"), with heights of 0.40" and 0.41" respectively, enabling equivalent mechanical compatibility.

Q: Is there any difference in moisture sensitivity and compliance between these models?
A: ULS-12/8.3-D48NM-C is rated MSL 3 (168 hours); CPT8B48NS is rated MSL 1 (Unlimited), both are RoHS compliant.

Q: Does CPT8B48NS provide matching control features and electrical performance?
A: According to the provided parameters, both offer Enable, Active Low control and share all primary electrical ratings.

Q: Are certification and agency approvals provided in both cases?
A: Approval agencies are listed only for CPT8B48NS (CSA, TUV, UL); none are specified for ULS-12/8.3-D48NM-C in the input parameters.

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