HCP0703-1R0-R Equivalent & Substitute Parts

Part Overview

The HCP0703-1R0-R is a 1 µH shielded drum core wirewound inductor rated for 11 A continuous current with a maximum DC resistance of 10 mOhm. Manufactured by Eaton Electronics Division, this component is designed for surface mount applications in the nonstandard package category. The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value
Inductance	1 µH
Current Rating	11 A
DC Resistance (DCR)	10 mOhm Max
Tolerance	±20%
Shielding	Shielded
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 125°C
Inductance Test Frequency	100 kHz
Height - Seated (Max)	0.118" (3.00 mm)
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the HCP0703-1R0-R is determined by strict equivalence across the following critical parameters:

Primary Electrical Criteria:

Inductance value: 1 µH (±20% tolerance)
Current rating: minimum 11 A continuous
DC resistance: maximum 10 mOhm
Shielding: required
Test frequency: 100 kHz

Primary Mechanical Criteria:

Mounting type: Surface Mount
Height seated maximum: 0.118" (3.00 mm)
Package type: Nonstandard or compatible SMD configuration
Moisture sensitivity: MSL 1 or equivalent

Environmental Criteria:

Operating temperature range: minimum -55°C to 125°C overlap required

Substitute parts are grouped into two categories: direct equivalents (matching all primary parameters within specified tolerances) and functional equivalents (meeting electrical requirements with minor dimensional or core material variations that do not affect circuit performance).

Parameter Comparison

Part Number	Manufacturer	Inductance	Current Rating (A)	DCR (mOhm Max)	Isat (A)	Type	Core Material	Temp Range	Status
HCP0703-1R0-R	Eaton	1 µH	11	10	22	Drum Core, Wirewound	Iron Powder	-55°C ~ 125°C	Obsolete
HCM0703-1R0-R	Eaton	1 µH	11	10	22	Drum Core, Wirewound	Iron Powder	-55°C ~ 125°C	Active
SRP7028A-1R0M	Bourns Inc.	1 µH	11	10	22	Drum Core, Wirewound	Carbonyl Powder	-40°C ~ 150°C	Active
SRP7030-1R0M	Bourns Inc.	1 µH	11	10	15	Drum Core	Iron	-40°C ~ 125°C	Active
IHLP2525CZER1R0M01	Vishay Dale	1 µH	11	10	22	Molded	Not specified	-55°C ~ 125°C	Active
LMLP07A7M1R0DTAS	KYOCERA AVX	1 µH	11	10	20	Not specified	Iron Powder	-55°C ~ 155°C	Active
MPLC0730L1R0	KEMET	1 µH	10.6	9	11	Wirewound	Not specified	-20°C ~ 120°C	Active
MPLCG0630L1R0	KEMET	1 µH	11.9	9	11.3	Drum Core, Wirewound	Metal Composite	-40°C ~ 125°C	Active

Engineering Selection Recommendations

Primary Recommendation: HCM0703-1R0-R

The HCM0703-1R0-R is the direct equivalent to the obsolete HCP0703-1R0-R. Both components are manufactured by Eaton Electronics Division within the same product family (HCP/HCM series). This part maintains identical electrical specifications (1 µH, 11 A, 10 mOhm DCR, 22 A Isat) and core material composition (iron powder drum core). The HCM0703-1R0-R is currently active with 3,716 units in stock and carries ROHS3 compliance certification. Dimensional compatibility is confirmed with matching 3.00 mm seated height. This substitution requires no circuit redesign or validation.

Secondary Recommendations: SRP7028A-1R0M and SRP7030-1R0M

Both Bourns SRP series inductors meet the electrical requirements of 1 µH inductance, 11 A current rating, and 10 mOhm maximum DCR. The SRP7028A-1R0M uses carbonyl powder core material and provides extended operating temperature range (-40°C to 150°C) with AEC-Q200 automotive qualification. The SRP7030-1R0M uses iron core material. Both are active products with substantial inventory availability and ROHS3 compliance. Dimensional compatibility is maintained at 3.00 mm to 3.20 mm seated height.

Tertiary Recommendations: IHLP2525CZER1R0M01 and LMLP07A7M1R0DTAS

The Vishay Dale IHLP2525CZER1R0M01 is a molded inductor construction that meets all electrical specifications with 22 A saturation current matching the original part. The KYOCERA AVX LMLP07A7M1R0DTAS provides extended temperature range to 155°C with iron powder core material and 20 A saturation current. Both are active products with ROHS3 compliance. These options are suitable where construction type variation is acceptable.

Alternative Consideration: MPLCG0630L1R0

The KEMET MPLCG0630L1R0 offers enhanced performance characteristics with 11.9 A current rating, 9 mOhm DCR, and metal composite core construction designated for low DCR and low loss applications. This part is suitable for applications where improved efficiency is required, though it operates within a narrower temperature range (-40°C to 125°C) and carries lower saturation current (11.3 A).

Not Recommended: MPLC0730L1R0

The KEMET MPLC0730L1R0 does not meet the minimum current rating requirement (10.6 A versus 11 A specified) and operates within a restricted temperature range (-20°C to 120°C). This part is not suitable as a direct substitute for the HCP0703-1R0-R.

Frequently Asked Questions (FAQ)

Q: Can the HCM0703-1R0-R be used as a direct replacement for HCP0703-1R0-R without circuit modification?

A: Yes. The HCM0703-1R0-R is electrically and mechanically identical to the HCP0703-1R0-R. Both components share the same inductance value (1 µH), current rating (11 A), DC resistance (10 mOhm maximum), saturation current (22 A), core material (iron powder), and operating temperature range (-55°C to 125°C). The only difference is product status: HCP0703-1R0-R is obsolete while HCM0703-1R0-R is active. No circuit redesign or validation is required.

Q: What is the significance of the saturation current (Isat) parameter in selecting a substitute?

A: Saturation current indicates the current level at which the inductor's inductance begins to degrade due to core saturation. The HCP0703-1R0-R specifies 22 A Isat, meaning the inductor maintains its 1 µH inductance value reliably up to 22 A. Substitute parts with lower Isat values (such as MPLC0730L1R0 at 11 A or MPLCG0630L1R0 at 11.3 A) may experience inductance degradation at the specified 11 A operating current, making them unsuitable for direct substitution.

Q: Are there packaging differences between the recommended substitutes?

A: The HCP0703-1R0-R uses nonstandard packaging. The HCM0703-1R0-R also uses nonstandard packaging. The Bourns SRP series (SRP7028A-1R0M and SRP7030-1R0M) use nonstandard packaging. The Vishay Dale IHLP2525CZER1R0M01 uses nonstandard packaging. The KYOCERA AVX LMLP07A7M1R0DTAS uses nonstandard packaging. All recommended substitutes are supplied in Tape & Reel (TR) format. Dimensional variations exist within the 0.118" to 0.126" seated height range, but all are compatible with standard surface mount assembly equipment.

Q: Which substitute offers the best thermal performance?

A: The KYOCERA AVX LMLP07A7M1R0DTAS provides the widest operating temperature range (-55°C to 155°C), offering 30°C additional upper temperature capability compared to the original HCP0703-1R0-R. The Bourns SRP7028A-1R0M extends the upper operating temperature to 150°C. For applications requiring operation above 125°C, these parts are preferred.

Q: What does ROHS3 compliance mean for component selection?

A: ROHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates the component meets European Union environmental regulations restricting the use of specific hazardous materials including lead, cadmium, mercury, and certain flame retardants. All active substitute parts listed carry ROHS3 certification, confirming compliance with current environmental standards for both new production and repair applications.

Q: Can the MPLC0730L1R0 be used as a substitute despite lower current rating?

A: No. The MPLC0730L1R0 is rated for 10.6 A continuous current, which is below the 11 A requirement of the HCP0703-1R0-R. Additionally, this part specifies only 11 A saturation current, indicating the inductor would saturate at the specified operating current. This part does not meet the electrical requirements and is not suitable for substitution.

Q: How do core material differences affect inductor performance?

A: The HCP0703-1R0-R uses iron powder core material. Substitute options include iron powder (HCM0703-1R0-R, LMLP07A7M1R0DTAS), carbonyl powder (SRP7028A-1R0M), iron (SRP7030-1R0M), metal composite (MPLCG0630L1R0), and unspecified core material (IHLP2525CZER1R0M01, MPLC0730L1R0). Core material affects frequency response, temperature stability, and loss characteristics. For applications sensitive to these parameters, core material consistency should be verified against circuit requirements.

Q: What is the significance of the Q factor specification?

A: The Q factor (quality factor) measures inductor efficiency at a specified frequency. The SRP7028A-1R0M specifies Q = 20 at 100 kHz. Most other parts do not provide Q factor data in the available specifications. For applications where inductor efficiency and loss characteristics are critical, the SRP7028A-1R0M provides documented performance data at the standard test frequency of 100 kHz.

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