49330SC Equivalent & Substitute Parts Reference

Part Overview

The 49330SC is a 33 µH shielded wirewound inductor manufactured by Murata Power Solutions Inc., rated for 2.9 A continuous current with a maximum DC resistance of 60 mOhm. This surface mount component operates across the temperature range of -40°C to 85°C and is classified as Active product status. Equivalent and substitute parts are identified when component availability is limited, supply chain disruptions occur, or design flexibility permits selection from qualified alternatives meeting the same electrical and mechanical specifications.

Key Parameters

Parameter	Value
Inductance	33 µH
Tolerance	±20%
Current Rating	2.9 A
DC Resistance (DCR)	60 mOhm Max
Shielding	Shielded
Mounting Type	Surface Mount
Package Type	Nonstandard, 4 Lead
Operating Temperature	-40°C to 85°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 49330SC are qualified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

Inductance value: 33 µH (exact match required)
Inductance tolerance: ±20% (matching tolerance band)
Shielding: Shielded construction
Mounting type: Surface Mount
Package dimensions: Nonstandard, 4 Lead configuration with maximum seated height of 0.315" (8.00 mm)
RoHS compliance: ROHS3 Compliant status

Current Rating Consideration: Substitute parts must maintain current ratings equal to or greater than 2.9 A to ensure thermal performance and reliability in the original application circuit.

DC Resistance: DCR values must not exceed 60 mOhm maximum to preserve circuit performance and minimize power dissipation.

Parameter Comparison

Parameter	49330SC (Murata)	SRR1280-330M (Bourns)	BPSC00131380330M00 (Pulse Electronics)
Inductance	33 µH	33 µH	33 µH
Tolerance	±20%	±20%	±20%
Current Rating (Amps)	2.9 A	4.6 A	4.8 A (Isat)
DC Resistance (DCR)	60 mOhm Max	57 mOhm Max	64.8 mOhm Max
Shielding	Shielded	Shielded	Shielded
Operating Temperature	-40°C to 85°C	-40°C to 125°C	-40°C to 105°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	Nonstandard, 4 Lead	Nonstandard	Nonstandard
Size / Dimension	0.480" L x 0.480" W (12.20 mm x 12.20 mm)	0.492" L x 0.492" W (12.50 mm x 12.50 mm)	0.492" L x 0.492" W (12.50 mm x 12.50 mm)
Height - Seated (Max)	0.315" (8.00 mm)	0.315" (8.00 mm)	0.315" (8.00 mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

SRR1280-330M (Bourns Inc.): This substitute meets all primary electrical specifications with a current rating of 4.6 A, exceeding the 2.9 A requirement of the 49330SC. DC resistance of 57 mOhm is within specification. The extended operating temperature range of -40°C to 125°C provides additional thermal margin. ROHS3 compliance and REACH Unaffected status align with regulatory requirements. Footprint dimensions are compatible within nonstandard package constraints.

BPSC00131380330M00 (Pulse Electronics): This substitute provides the specified 33 µH inductance with a saturation current rating of 4.8 A, offering superior current handling capability. DC resistance of 64.8 mOhm remains within the 60 mOhm maximum specification. Operating temperature range extends to 105°C. ROHS3 compliance and REACH Unaffected status satisfy regulatory requirements. Footprint dimensions are compatible with the nonstandard package specification.

Frequently Asked Questions (FAQ)

Q: Can SRR1280-330M be used as a direct replacement for 49330SC? A: Yes. Both components share identical inductance (33 µH), tolerance (±20%), shielding, and mounting type. The SRR1280-330M exceeds current rating requirements and maintains DC resistance within specification. Footprint compatibility is confirmed within nonstandard package constraints.

Q: What is the impact of different DC resistance values on circuit performance? A: DC resistance directly affects power dissipation and thermal performance. The 49330SC specifies 60 mOhm maximum. SRR1280-330M at 57 mOhm provides lower dissipation. BPSC00131380330M00 at 64.8 mOhm exceeds the maximum specification and may result in increased power loss.

Q: Are there footprint considerations when substituting these parts? A: The 49330SC measures 0.480" x 0.480" (12.20 mm x 12.20 mm). Both substitute parts measure 0.492" x 0.492" (12.50 mm x 12.50 mm). All three components share identical seated height of 0.315" (8.00 mm). PCB layout verification is required to confirm dimensional compatibility.

Q: Do all substitute parts meet the same compliance standards? A: Yes. All three components are ROHS3 Compliant, REACH Unaffected, and classified as MSL 1 (Unlimited). ECCN classifications are EAR99 for all parts.

Q: What is the difference between current rating and saturation current? A: Current rating represents continuous operating current capacity. Saturation current (Isat) indicates the current level at which inductance begins to degrade. The 49330SC specifies 2.9 A continuous rating. SRR1280-330M provides 4.6 A continuous with 3.3 A Isat. BPSC00131380330M00 specifies 4.8 A Isat.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message