HCM1305-7R8-R Equivalent & Substitute Parts

Part Overview

The HCM1305-7R8-R is a 7.8 µH shielded drum core wirewound inductor manufactured by Eaton - Electronics Division. This surface mount component is rated for 10 A continuous current with a maximum DC resistance of 19.4 mOhm and operates across the temperature range of -55°C to 125°C. The part is ROHS3 compliant and carries an active product status. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to inventory constraints, supply chain considerations, or design flexibility within the allowed parameter tolerances.

Substiute Parts

HCM1305-7R8-R

Eaton - Electronics DivisionIn Stock: 824HCM1305-7R8-R Datasheet

Current PartRFQ

IHLP5050EZER7R8M01

Vishay DaleIn Stock: 1762IHLP5050EZER7R8M01 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HCM1305-7R8-R are qualified based on the following electrical and mechanical parameters:

Critical Matching Parameters:

• Inductance value: 7.8 µH
• Inductance tolerance: ±20%
• Current rating: 10 A minimum
• Shielding: Shielded construction required
• Operating temperature range: -55°C to 125°C minimum
• Mounting type: Surface mount
• RoHS compliance: ROHS3 compliant

Allowable Variations:

• DC resistance: Substitute parts may have DCR up to 20.5 mOhm (within acceptable loss parameters for this inductance class)
• Saturation current: Substitute parts rated at 18 A or higher satisfy the 10 A continuous requirement
• Core construction: Drum core and molded core types are both acceptable for this application class
• Package dimensions: Minor variations in length and width are acceptable provided height remains at or below 5.00 mm maximum seated height

The IHLP5050EZER7R8M01 from Vishay Dale meets all critical parameters and is therefore qualified as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

Both the HCM1305-7R8-R and IHLP5050EZER7R8M01 are active products with ROHS3 compliance and MSL 1 rating, indicating full regulatory alignment for industrial and commercial applications. The primary distinction between these parts is the core construction type: the HCM1305-7R8-R uses a drum core wirewound design, while the IHLP5050EZER7R8M01 employs a molded construction. Both designs deliver the specified 7.8 µH inductance at 10 A with shielded performance across the -55°C to 125°C operating window.

The DC resistance differential of 1.1 mOhm (HCM1305-7R8-R at 19.4 mOhm versus IHLP5050EZER7R8M01 at 20.5 mOhm) represents a 5.7% increase in maximum loss. This variation is within acceptable limits for applications where the inductor operates at or below rated current. The saturation current specifications (18.5 A versus 18 A) both exceed the 10 A continuous rating with adequate margin.

Selection between these parts should be based on PCB layout constraints, thermal management requirements, and supplier availability. Both parts are suitable for direct substitution in applications requiring 7.8 µH shielded surface mount inductors rated for 10 A continuous operation.

Frequently Asked Questions (FAQ)

Q: Can the IHLP5050EZER7R8M01 be used as a direct replacement for the HCM1305-7R8-R?

A: Yes. Both parts meet the critical electrical specifications: 7.8 µH inductance at ±20% tolerance, 10 A current rating, shielded construction, and -55°C to 125°C operating range. The DC resistance increase of 1.1 mOhm is within acceptable engineering tolerance for this component class.

Q: What is the significance of the different core materials?

A: The HCM1305-7R8-R uses iron powder core construction in a drum core configuration, while the IHLP5050EZER7R8M01 uses molded construction. Both achieve the specified inductance and current ratings. Core material differences do not affect substitution eligibility when electrical performance parameters are equivalent.

Q: Are there dimensional compatibility concerns?

A: The parts have similar footprints with minor variations: HCM1305-7R8-R measures 13.30 mm × 12.20 mm, while IHLP5050EZER7R8M01 measures 13.20 mm × 12.90 mm. Both maintain the same 5.00 mm maximum seated height. These dimensional differences are within standard PCB layout tolerances for surface mount components.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the HCM1305-7R8-R and IHLP5050EZER7R8M01 are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. Both carry active product status and are suitable for applications requiring regulatory compliance.

Q: What is the impact of the 0.5 A saturation current difference?

A: The HCM1305-7R8-R has a saturation current of 18.5 A, while the IHLP5050EZER7R8M01 is rated at 18 A. Both values exceed the 10 A continuous current rating by a factor of 1.8 or greater, providing adequate margin for transient current conditions. This difference does not affect substitution suitability.

Q: Can these parts be used interchangeably in existing designs?

A: Yes, provided the design does not depend on specific core construction characteristics or the lower DC resistance of the HCM1305-7R8-R. For applications sensitive to inductor losses, verify that the additional 1.1 mOhm resistance in the IHLP5050EZER7R8M01 remains within acceptable thermal and efficiency parameters.