49330C Equivalent & Substitute Parts

Part Overview

The Murata Power Solutions Inc. 49330C is a 33 µH shielded wirewound inductor rated for 2.5 A continuous current with a maximum DC resistance of 128mOhm. This surface mount component operates across the temperature range of -40°C to 85°C and is designed for applications requiring fixed inductance in compact form factors. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances.

Key Parameters

Parameter	Value
Inductance	33 µH
Current Rating	2.5 A
DC Resistance (DCR)	128mOhm Max
Shielding	Shielded
Mounting Type	Surface Mount
Package Type	Nonstandard, 4 Lead
Operating Temperature	-40°C ~ 85°C
Size	12.00mm x 12.00mm x 8.00mm (Max)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

The Bourns Inc. SRF1280-330M qualifies as a substitute based on the following substitution criteria:

Electrical Equivalence: The SRF1280-330M is a 2-coil inductor array that provides 33 µH inductance when connected in parallel configuration, matching the primary inductance specification of the 49330C. The parallel current rating of 3.23 A exceeds the 2.5 A requirement, and the parallel DC resistance of 66.4mOhm is lower than the 128mOhm maximum, providing improved performance characteristics.

Mechanical Compatibility: Both components are surface mount devices with nonstandard packages and 4-lead configurations. Physical dimensions are comparable (12.50mm x 12.50mm x 8.00mm for the substitute versus 12.00mm x 12.00mm x 8.00mm for the main part), permitting board-level integration within similar footprint constraints.

Environmental & Compliance Alignment: The SRF1280-330M maintains RoHS3 compliance, MSL 1 rating, and operates across -40°C to 125°C, encompassing the 49330C operating range. Both components carry identical ECCN and HTSUS classifications.

Parameter Comparison

Parameter	49330C (Murata)	SRF1280-330M (Bourns)	Notes
Inductance (Primary Configuration)	33 µH	33 µH (Parallel)	Electrical equivalence confirmed
Current Rating	2.5 A	3.23 A (Parallel)	Substitute exceeds requirement
DC Resistance (DCR)	128mOhm Max	66.4mOhm Max (Parallel)	Substitute provides lower resistance
Shielding	Shielded	Shielded	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Package Configuration	Nonstandard, 4 Lead	Nonstandard, 4 Lead	Equivalent
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 125°C	Substitute provides extended range
Size (L x W x H)	12.00 x 12.00 x 8.00 mm	12.50 x 12.50 x 8.00 mm	Minimal dimensional variance
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
MSL Rating	1 (Unlimited)	1 (Unlimited)	Equivalent

Engineering Selection Recommendations

The SRF1280-330M is electrically and mechanically suitable as a substitute for the 49330C in applications requiring 33 µH fixed inductance at 2.5 A or lower current levels. The substitute component provides performance advantages including higher current capacity (3.23 A parallel rating), lower DC resistance (66.4mOhm versus 128mOhm), and extended operating temperature range (-40°C to 125°C versus -40°C to 85°C). Both components maintain identical regulatory compliance status (RoHS3, MSL 1, REACH Unaffected, EAR99 ECCN classification). Selection between these parts should be based on availability, cost considerations, and specific thermal or current margin requirements of the application.

Frequently Asked Questions (FAQ)

Q: Can the SRF1280-330M be used as a direct replacement for the 49330C?

A: Yes, when configured in parallel mode. The SRF1280-330M provides 33 µH inductance in parallel configuration, matching the 49330C specification. Electrical parameters (current rating and DC resistance) meet or exceed the original part requirements.

Q: What is the difference between the parallel and series configurations of the SRF1280-330M?

A: The SRF1280-330M is a 2-coil array offering dual configurations. In parallel mode, it provides 33 µH inductance with 3.23 A current rating and 66.4mOhm DCR. In series mode, it provides 132 µH inductance with 1.61 A current rating and 265mOhm DCR. For substitution of the 49330C, only the parallel configuration applies.

Q: Are there physical footprint differences between these components?

A: Minor dimensional variance exists. The 49330C measures 12.00mm x 12.00mm, while the SRF1280-330M measures 12.50mm x 12.50mm. Both share identical height (8.00mm maximum). Board layout verification is recommended to confirm clearance compatibility.

Q: Do both components meet the same environmental and compliance standards?

A: Yes. Both the 49330C and SRF1280-330M are RoHS3 compliant, carry MSL 1 (unlimited) moisture sensitivity ratings, are REACH unaffected, and share identical ECCN (EAR99) and HTSUS (8504.50.4000) classifications.

Q: What is the operating temperature difference between these parts?

A: The 49330C operates from -40°C to 85°C, while the SRF1280-330M operates from -40°C to 125°C. The substitute component provides a 40°C extended upper temperature range, suitable for higher thermal environment applications.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message