CDRH127NP-271MC Equivalent & Substitute Parts

Part Overview

The CDRH127NP-271MC is a 270 µH shielded surface mount inductor manufactured by Sumida America Components Inc. This fixed inductor is designed for applications requiring moderate inductance values with controlled DC resistance characteristics. The part operates across an industrial temperature range of -40°C to 100°C and is RoHS3 compliant. Substitute parts are identified to provide design flexibility when the primary part becomes unavailable or when alternative electrical characteristics better suit specific application requirements.

Substiute Parts

CDRH127NP-271MC

Sumida America Components Inc.In Stock: 906CDRH127NP-271MC Datasheet

Current PartRFQ

SRR1280-271K

Bourns Inc.In Stock: 1451SRR1280-271K Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDRH127NP-271MC with the SRR1280-271K is based on the following alignment of critical electrical and mechanical parameters:

Inductance Match: Both parts provide 270 µH nominal inductance, meeting the core functional requirement. The CDRH127NP-271MC specifies ±20% tolerance, while the SRR1280-271K provides tighter ±10% tolerance.

Current Rating Compatibility: The SRR1280-271K current rating of 1.2 A exceeds the CDRH127NP-271MC requirement of 1.06 A, providing margin for thermal and operational headroom.

DC Resistance: The SRR1280-271K DCR of 450 mOhm Max is lower than the CDRH127NP-271MC at 560 mOhm Max, resulting in reduced power dissipation and improved efficiency.

Shielding: Both parts feature shielding, maintaining electromagnetic isolation characteristics required in noise-sensitive applications.

Surface Mount Configuration: Both parts are surface mount inductors with nonstandard package dimensions of approximately 12.5 x 12.5 x 8.0 mm, compatible with standard PCB assembly processes.

Compliance: Both parts are RoHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, ensuring equivalent environmental and regulatory compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Part (CDRH127NP-271MC): Select when Sumida supply chain is preferred or when the specific DCR characteristic of 560 mOhm Max is required by circuit design. Product status is Active with 838 units in stock.

Substitute Part (SRR1280-271K): Select when improved performance margins are beneficial. The SRR1280-271K offers higher current rating (1.2 A vs 1.06 A), lower DCR (450 mOhm vs 560 mOhm), tighter inductance tolerance (±10% vs ±20%), and extended operating temperature range (-40°C to 125°C vs -40°C to 100°C). Both parts maintain ROHS3 compliance and MSL 1 rating. Product status is Active with 1379 units in stock.

PCB Layout Consideration: The SRR1280-271K footprint is 0.5 mm larger in length and width (12.50 mm vs 12.00 mm). Verify PCB layout clearance before substitution.

Frequently Asked Questions (FAQ)

Q: Can the SRR1280-271K directly replace the CDRH127NP-271MC on existing PCBs?

A: Electrical substitution is valid. However, the SRR1280-271K has a slightly larger footprint (12.50 x 12.50 mm vs 12.00 x 12.00 mm). Verify PCB pad spacing and component clearance before assembly. Height is identical at 8.00 mm.

Q: What is the primary advantage of the SRR1280-271K substitute?

A: The SRR1280-271K provides lower DC resistance (450 mOhm vs 560 mOhm), reducing power dissipation by approximately 20%. It also offers higher current rating (1.2 A vs 1.06 A) and tighter inductance tolerance (±10% vs ±20%).

Q: Are both parts suitable for high-temperature applications?

A: The CDRH127NP-271MC operates to 100°C. The SRR1280-271K extends to 125°C, providing additional thermal margin for applications approaching the upper temperature limit.

Q: Do both parts have identical moisture sensitivity ratings?

A: Yes. Both parts carry MSL 1 (Unlimited) rating, indicating no moisture sensitivity restrictions for storage or handling.

Q: What is the inductance tolerance difference impact?

A: The CDRH127NP-271MC has ±20% tolerance (216–324 µH range). The SRR1280-271K has ±10% tolerance (243–297 µH range). For circuits requiring tighter inductance control, the SRR1280-271K provides superior specification compliance.

Q: Are both parts RoHS compliant?

A: Yes. Both the CDRH127NP-271MC and SRR1280-271K are ROHS3 compliant, meeting current environmental and regulatory requirements.