CDRH74-181MC Equivalent & Substitute Parts

Part Overview

The CDRH74-181MC is a 180 µH shielded inductor manufactured by Sumida America Components Inc., rated for 420 mA with a maximum DC resistance of 980 mOhm. This surface mount component features a nonstandard package measuring 7.30mm × 7.30mm × 4.50mm (seated height) and operates across the temperature range of -40°C to 100°C.

The CDRH74-181MC is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this inductor specification.

Substiute Parts

CDRH74-181MC

Sumida America Components Inc.In Stock: 690CDRH74-181MC Datasheet

Current PartRFQ

CDRH74NP-181MC-B

Sumida America Components Inc.In Stock: 2071CDRH74NP-181MC-B Datasheet

DirectRFQ

P1167.184NLT

Pulse ElectronicsIn Stock: 743P1167.184NLT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CDRH74-181MC are identified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Critical Parameters for Substitution:

• Inductance value: 180 µH (±20% tolerance)
• Current rating: minimum 420 mA
• DC resistance: maximum 980 mOhm
• Shielding: Shielded configuration required
• Mounting type: Surface Mount
• Physical footprint compatibility: 7.30mm × 7.30mm base dimensions with 4.50mm maximum seated height
• Operating temperature range: -40°C to 100°C minimum

Substitute parts are classified into two categories:

Direct Manufacturer Substitute: Parts from the same manufacturer (Sumida) with identical electrical specifications and active product status, differing only in packaging configuration.

Similar Manufacturer Substitute: Parts from alternative manufacturers meeting or exceeding the electrical specifications with compatible physical dimensions, offering enhanced compliance status or extended operating temperature range.

Parameter Comparison

Engineering Selection Recommendations

CDRH74NP-181MC-B (Direct Manufacturer Substitute)

The CDRH74NP-181MC-B is the primary substitute for the obsolete CDRH74-181MC. Both parts are manufactured by Sumida America Components Inc. and share identical electrical specifications: 180 µH inductance, 420 mA current rating, and 980 mOhm maximum DC resistance. The CDRH74NP-181MC-B maintains the same operating temperature range (-40°C to 100°C) and physical dimensions (7.30mm × 7.30mm × 4.50mm).

The CDRH74NP-181MC-B is classified as an active product with ROHS3 compliance, addressing regulatory requirements that the original part does not meet. This substitute is available in Tape & Reel packaging with 2000 pieces in stock, providing superior supply chain availability compared to the obsolete original part.

P1167.184NLT (Similar Manufacturer Substitute)

The P1167.184NLT, manufactured by Pulse Electronics, meets or exceeds the electrical requirements of the CDRH74-181MC. This part provides a higher current rating (470 mA versus 420 mA) and lower DC resistance (820 mOhm maximum versus 980 mOhm maximum), delivering improved performance margins. The operating temperature range extends to 130°C, providing enhanced thermal capability.

Physical dimensions are slightly larger (7.54mm × 7.54mm versus 7.30mm × 7.30mm), requiring verification of PCB layout compatibility. The P1167.184NLT is ROHS3 compliant and available in Tape & Reel packaging with 674 pieces in stock. This substitute is suitable for applications where the marginal increase in footprint is acceptable and enhanced performance specifications are beneficial.

Frequently Asked Questions (FAQ)

Q: Can the CDRH74NP-181MC-B be used as a direct replacement for the CDRH74-181MC?

A: Yes. The CDRH74NP-181MC-B is a direct electrical and mechanical equivalent. Both parts share identical inductance (180 µH), current rating (420 mA), DC resistance (980 mOhm maximum), physical dimensions (7.30mm × 7.30mm × 4.50mm), and operating temperature range (-40°C to 100°C). The primary difference is product status (active versus obsolete) and RoHS compliance (ROHS3 versus non-compliant). No circuit modifications are required.

Q: What are the physical dimension differences between the CDRH74-181MC and P1167.184NLT?

A: The CDRH74-181MC measures 7.30mm × 7.30mm, while the P1167.184NLT measures 7.54mm × 7.54mm. Both maintain the same seated height of 4.50mm maximum. The 0.24mm increase in length and width must be evaluated against PCB layout constraints and component spacing requirements.

Q: Does the P1167.184NLT provide performance advantages over the CDRH74-181MC?

A: The P1167.184NLT offers improved electrical performance: current rating of 470 mA (versus 420 mA) and DC resistance of 820 mOhm maximum (versus 980 mOhm maximum). The operating temperature range extends to 130°C compared to 100°C. These specifications provide additional design margin and thermal capability.

Q: Are there packaging differences between the substitute parts?

A: The CDRH74-181MC is supplied in bulk packaging. Both substitute parts (CDRH74NP-181MC-B and P1167.184NLT) are supplied in Tape & Reel (TR) packaging, which is standard for automated assembly processes and provides improved handling and traceability.

Q: What is the significance of the RoHS compliance difference?

A: The CDRH74-181MC is RoHS non-compliant, while both substitute parts (CDRH74NP-181MC-B and P1167.184NLT) are ROHS3 compliant. ROHS3 compliance is required for products sold into the European Union and many other regulated markets. For new designs or products subject to RoHS regulations, the compliant substitutes are mandatory.

Q: Can the inductance tolerance of ±20% affect circuit performance?

A: All three parts share the same inductance tolerance of ±20%. Circuit designs utilizing the CDRH74-181MC must already account for this tolerance range. Substitute parts maintain this tolerance specification, ensuring equivalent circuit behavior within the design's tolerance budget.

Q: What is the difference between the inductance test frequencies?

A: The CDRH74-181MC and CDRH74NP-181MC-B are tested at 1 kHz, while the P1167.184NLT is tested at 100 kHz. This difference reflects manufacturer test methodology and does not affect the 180 µH nominal inductance value. Both test frequencies are standard industry practices for inductor characterization.