HC9-2R2-R Equivalent & Substitute Parts

Part Overview

The HC9-2R2-R is a 2.2 µH unshielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 17.2 A continuous current with a maximum DC resistance of 3.37 mOhm and operates across the temperature range of -40°C to 155°C. The part is RoHS Compliant and carries an MSL rating of 1 (Unlimited). As an active product with 1305 units in stock, substitute parts may be required due to design optimization, supply chain considerations, or application-specific performance requirements.

Substiute Parts

HC9-2R2-R

Eaton - Electronics DivisionIn Stock: 1338HC9-2R2-R Datasheet

Current PartRFQ

SRP1265A-2R2M

Bourns Inc.In Stock: 9647SRP1265A-2R2M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HC9-2R2-R is based on the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Inductance value: 2.2 µH (exact match required)
• Inductance tolerance: ±15% or tighter
• Current rating: minimum 17.2 A continuous
• Saturation current: minimum 26 A
• DC resistance: 3.37 mOhm or lower
• Core type: Drum core wirewound construction
• Mounting type: Surface mount
• Packaging: Tape & Reel format
• Operating temperature range: must encompass -40°C to 155°C or equivalent
• RoHS compliance status: RoHS Compliant or ROHS3 Compliant

The SRP1265A-2R2M from Bourns Inc. meets these substitution criteria with equivalent inductance, higher current rating capability, and compatible surface mount packaging. Differences in core material (carbonyl powder vs. iron powder), shielding configuration, and DCR characteristics are secondary considerations that do not prevent substitution when primary electrical parameters are satisfied.

Parameter Comparison

Engineering Selection Recommendations

HC9-2R2-R Selection Criteria:

• Applications requiring unshielded inductor configuration
• Designs with upper operating temperature requirement of 155°C
• Systems where lower DCR (3.37 mOhm) is critical for thermal management
• Existing inventory availability (1305 units in stock)
• Iron powder core material preference for specific frequency response characteristics

SRP1265A-2R2M Selection Criteria:

• Applications benefiting from shielded inductor configuration to reduce EMI coupling
• Designs with higher current margin requirements (22 A vs. 17.2 A rating)
• Systems where slightly higher DCR (4.2 mOhm) is acceptable
• AEC-Q200 automotive qualification requirement
• Smaller physical footprint and lower profile (6.40mm vs. 7.50mm height)
• Higher saturation current (37 A vs. 26 A) for transient current handling
• ROHS3 compliance for latest regulatory requirements

Both parts are active products with RoHS compliance and unlimited MSL ratings. The substitute part offers enhanced current handling and shielding at the trade-off of slightly higher DCR and marginally narrower upper temperature limit.

Frequently Asked Questions (FAQ)

Q: Can the SRP1265A-2R2M directly replace the HC9-2R2-R in all applications?

A: Direct replacement is possible when the application does not require the HC9-2R2-R's specific upper temperature limit of 155°C (substitute is rated to 150°C) and when the higher DCR of 4.2 mOhm versus 3.37 mOhm does not create thermal or efficiency concerns. The substitute's shielded configuration may improve EMI performance in sensitive circuits.

Q: What is the impact of the different core materials (iron powder vs. carbonyl powder)?

A: Iron powder and carbonyl powder cores exhibit different frequency response and temperature stability characteristics. Both materials are suitable for 2.2 µH inductance applications. Selection between them depends on specific circuit requirements for Q factor, frequency response, and temperature coefficient performance, which are not specified in the provided parameters.

Q: Are there physical footprint compatibility issues between these parts?

A: The SRP1265A-2R2M is slightly smaller (13.50mm x 12.50mm vs. 14.10mm x 13.10mm) and lower profile (6.40mm vs. 7.50mm). PCB footprint and clearance must be verified for the specific application. The smaller dimensions may allow for improved board layout in space-constrained designs.

Q: Does the shielded configuration of the SRP1265A-2R2M affect circuit performance?

A: Shielding reduces electromagnetic coupling to adjacent components and traces, which can improve circuit stability and reduce EMI. In applications where the HC9-2R2-R's unshielded design was intentional for specific coupling requirements, the substitute's shielded configuration may alter circuit behavior.

Q: What is the significance of the AEC-Q200 rating on the SRP1265A-2R2M?

A: AEC-Q200 is an automotive qualification standard indicating the part has undergone reliability testing for automotive applications. This certification is relevant only if automotive-grade components are required by the application specification.

Q: How do the inductance tolerances affect substitution?

A: The HC9-2R2-R has ±15% tolerance while the SRP1265A-2R2M has ±20% tolerance. For applications with tight inductance requirements, the wider tolerance of the substitute may be unsuitable. For applications with relaxed tolerance requirements, both parts are equivalent.

Q: Is the higher saturation current of the SRP1265A-2R2M (37 A vs. 26 A) beneficial?

A: Higher saturation current provides greater margin for transient current events and reduces the risk of inductor saturation under peak load conditions. This is beneficial in applications with variable or pulsed current profiles.