Equivalent & Substitute Parts for 233R3C

Part Overview

The 233R3C is a 3.3 µH unshielded wirewound inductor manufactured by Murata Power Solutions Inc., rated for 1.8 A continuous current with a maximum DC resistance of 58 mOhm. This component is classified as Active and RoHS3 compliant, designed for surface mount applications in nonstandard package configurations. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances.

Key Parameters

Parameter	Value
Inductance	3.3 µH
Current Rating	1.8 A
DC Resistance (DCR)	58 mOhm Max
Shielding	Unshielded
Mounting Type	Surface Mount
Package Size	0.177" L x 0.157" W (4.50mm x 4.00mm)
Operating Temperature Range	-40°C ~ 85°C
RoHS Status	RoHS3 Compliant

Substitute Part Grouping Explanation

The SDR0403-3R3ML from Bourns Inc. qualifies as a direct substitute based on the following critical parameters:

Inductance value matches at 3.3 µH
DC resistance specification matches at 58 mOhm Max
Unshielded configuration matches
Surface mount mounting type matches
Physical footprint matches at 0.177" L x 0.157" W (4.50mm x 4.00mm)
RoHS3 compliance maintained
Moisture Sensitivity Level (MSL) rating matches at Level 1

The substitute part exceeds the minimum current rating requirement (2.15 A vs. 1.8 A), providing additional design margin. Height difference of 0.012" (0.30mm) remains within typical PCB assembly tolerances for nonstandard packages.

Parameter Comparison

Parameter	233R3C (Murata)	SDR0403-3R3ML (Bourns)
Inductance	3.3 µH	3.3 µH
Current Rating (Amps)	1.8 A	2.15 A
DC Resistance (DCR)	58 mOhm Max	58 mOhm Max
Shielding	Unshielded	Unshielded
Type	Wirewound	Drum Core, Wirewound
Mounting Type	Surface Mount	Surface Mount
Package Size (L x W)	0.177" x 0.157" (4.50mm x 4.00mm)	0.177" x 0.157" (4.50mm x 4.00mm)
Height - Seated (Max)	0.126" (3.20mm)	0.138" (4.60mm)
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C
RoHS Status	RoHS3 Compliant	RoHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Both the 233R3C and SDR0403-3R3ML maintain Active product status with full RoHS3 compliance and REACH unaffected designation. The SDR0403-3R3ML provides equivalent electrical performance with superior current handling capacity. Selection between these parts should be based on:

Availability and lead time requirements
PCB assembly equipment capability to accommodate the 0.30mm height difference
Thermal environment constraints within the specified operating ranges
Cost and inventory considerations

Frequently Asked Questions (FAQ)

Q: Can the SDR0403-3R3ML replace the 233R3C in existing designs?

A: Yes. Both parts maintain identical inductance (3.3 µH), DC resistance (58 mOhm Max), and footprint dimensions (4.50mm x 4.00mm). The substitute part's higher current rating (2.15 A) and extended temperature range (-40°C ~ 125°C) provide additional design margin.

Q: What is the impact of the 0.30mm height difference?

A: The SDR0403-3R3ML seated height of 4.60mm versus the 233R3C at 3.20mm represents a 0.30mm increase. This difference must be verified against PCB assembly clearance requirements and component placement constraints.

Q: Are there any compliance differences between these parts?

A: No. Both parts are RoHS3 compliant, REACH unaffected, and carry identical MSL Level 1 ratings. ECCN and HTSUS classifications match.

Q: What determines substitution eligibility for this inductor category?

A: Substitution is valid when inductance value, DC resistance specification, shielding configuration, footprint dimensions, and compliance certifications remain constant. Current rating may exceed the original specification without affecting compatibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message