CDRH73NP-331MC-B Equivalent & Substitute Parts

Part Overview

The CDRH73NP-331MC-B is a 330 µH shielded surface mount inductor manufactured by Sumida America Components Inc. This fixed inductor is rated for 280 mA continuous current with a maximum DC resistance of 2.62 Ohm and operates across the temperature range of -40°C to 100°C. The component is classified as Active product status and is RoHS3 compliant. Equivalent and substitute parts are identified when design requirements necessitate alternative sourcing, inventory availability, or performance optimization within the specified electrical and mechanical parameters.

Key Parameters

Parameter	Value	Unit
Inductance	330	µH
Inductance Tolerance	±20%	-
Current Rating	280	mA
DC Resistance (Max)	2.62	Ohm
Shielding	Shielded	-
Operating Temperature Range	-40°C to 100°C	-
Mounting Type	Surface Mount	-
Package Type	Nonstandard	-
Size (L x W)	7.30 x 7.30	mm
Height (Max)	3.40	mm
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitute parts for the CDRH73NP-331MC-B are identified based on strict electrical and mechanical compatibility criteria. The primary substitution logic is based on the following parameters:

Critical Matching Parameters:

Inductance value: 330 µH (±20% tolerance)
Inductance tolerance: ±20%
Shielding requirement: Shielded
Mounting type: Surface Mount
Package classification: Nonstandard
RoHS compliance: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Allowable Variation Parameters:

Current rating: Substitute must meet or exceed 280 mA minimum
DC resistance: Substitute must not exceed 2.62 Ohm maximum
Operating temperature range: Substitute must cover or exceed -40°C to 100°C
Physical dimensions: Substitute must fit within or match the footprint constraints (7.30mm x 7.30mm x 3.40mm max height)

The P1166.334NLT from Pulse Electronics qualifies as a direct substitute based on these criteria.

Parameter Comparison

Parameter	CDRH73NP-331MC-B (Sumida)	P1166.334NLT (Pulse Electronics)	Compatibility
Inductance	330 µH	330 µH	Match
Inductance Tolerance	±20%	±20%	Match
Current Rating	280 mA	310 mA	Substitute exceeds requirement
DC Resistance (Max)	2.62 Ohm	1.88 Ohm	Substitute is lower (improved)
Shielding	Shielded	Shielded	Match
Operating Temperature Range	-40°C to 100°C	-40°C to 130°C	Substitute exceeds requirement
Mounting Type	Surface Mount	Surface Mount	Match
Package Type	Nonstandard	Nonstandard	Match
Size (L x W)	7.30 x 7.30 mm	7.54 x 7.54 mm	Substitute slightly larger
Height (Max)	3.40 mm	3.51 mm	Substitute slightly taller
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Match
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Match

Engineering Selection Recommendations

CDRH73NP-331MC-B (Sumida America Components Inc.)

This is the primary component specification. It is Active product status with ROHS3 compliance and MSL 1 rating. Selection is appropriate when exact dimensional constraints are critical, particularly the 7.30mm x 7.30mm footprint and 3.40mm maximum height. Current inventory of 933 pieces supports immediate availability.

P1166.334NLT (Pulse Electronics)

This substitute part is Active product status with ROHS3 compliance, MSL 1 rating, and REACH Unaffected status. The P1166.334NLT provides improved electrical performance with lower DC resistance (1.88 Ohm vs. 2.62 Ohm) and higher current rating (310 mA vs. 280 mA). The extended operating temperature range (-40°C to 130°C) provides additional thermal margin. Physical dimensions are marginally larger (7.54mm x 7.54mm x 3.51mm), requiring verification of PCB layout clearance. Current inventory of 882 pieces supports availability. Selection is appropriate when improved electrical characteristics and thermal performance are beneficial and layout constraints permit the slightly larger footprint.

Frequently Asked Questions (FAQ)

Q: Can the P1166.334NLT be used as a direct replacement for the CDRH73NP-331MC-B?

A: The P1166.334NLT qualifies as a substitute based on matching inductance value, tolerance, shielding, mounting type, and compliance certifications. However, the slightly larger physical dimensions (7.54mm x 7.54mm vs. 7.30mm x 7.30mm) and increased height (3.51mm vs. 3.40mm) require PCB layout verification to confirm adequate clearance and component spacing.

Q: What are the key electrical differences between these parts?

A: The P1166.334NLT provides lower DC resistance (1.88 Ohm vs. 2.62 Ohm maximum) and higher current rating (310 mA vs. 280 mA). Both parts maintain the same 330 µH inductance value and ±20% tolerance. The lower resistance reduces power dissipation and heat generation in the inductor.

Q: Are both parts RoHS compliant?

A: Yes, both the CDRH73NP-331MC-B and P1166.334NLT are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, suitable for standard PCB assembly and storage conditions.

Q: What is the temperature operating range difference?

A: The CDRH73NP-331MC-B operates from -40°C to 100°C, while the P1166.334NLT operates from -40°C to 130°C. The substitute part provides 30°C additional upper temperature margin, beneficial for applications with elevated ambient or self-heating conditions.

Q: How do the physical dimensions affect PCB design?

A: The CDRH73NP-331MC-B footprint is 7.30mm x 7.30mm with 3.40mm maximum height. The P1166.334NLT footprint is 7.54mm x 7.54mm with 3.51mm maximum height. The 0.24mm increase in length and width and 0.11mm increase in height must be accommodated in the PCB layout. Verify clearance with adjacent components and routing before substitution.

Q: What is the inductance test frequency for each part?

A: The CDRH73NP-331MC-B inductance is tested at 1 kHz, while the P1166.334NLT inductance is tested at 100 kHz. Both parts maintain the specified 330 µH ±20% inductance value at their respective test frequencies.

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