HPL1005-4N7 Equivalent & Substitute Parts

Part Overview

The HPL1005-4N7 is a 4.7 nH unshielded thin film inductor manufactured by Susumu, designed for surface mount applications in the 0402 (1005 Metric) package. This component is rated for 500 mA continuous current with a maximum DC resistance of 500 mOhm and operates at a self-resonant frequency of 6 GHz. The part is classified as obsolete, necessitating identification of active equivalent components that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value	Unit
Inductance	4.7	nH
Inductance Tolerance	±0.2	nH
Current Rating	500	mA
DC Resistance (Max)	500	mOhm
Package / Case	0402 (1005 Metric)	—
Mounting Type	Surface Mount	—
Shielding	Unshielded	—
Type	Thin Film	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the HPL1005-4N7 is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

Inductance value: 4.7 nH (tolerance range acceptable within ±0.2 nH specification)
DC resistance: 500 mOhm maximum
Current rating: minimum 500 mA (substitute must support or exceed this requirement)
Unshielded configuration

Mechanical Parameters:

Package: 0402 (1005 Metric) surface mount
Physical dimensions: 0.039" L x 0.020" W (1.00mm x 0.50mm)
Height seated: compatible with 0402 standard envelope

Compliance Parameters:

RoHS3 compliance
MSL 1 rating
REACH unaffected status

The ATFC-0402HQ-4N7B-T from Abracon LLC meets these substitution criteria with the exception of current rating, which is specified at 330 mA versus the original 500 mA requirement. This represents a reduction in current handling capability and must be evaluated against circuit requirements.

Parameter Comparison

Parameter	HPL1005-4N7 (Susumu)	ATFC-0402HQ-4N7B-T (Abracon LLC)	Match Status
Inductance	4.7 nH	4.7 nH	Equivalent
Inductance Tolerance	±0.2 nH	±0.1 nH	Substitute Tighter
Current Rating	500 mA	330 mA	Substitute Lower
DC Resistance (Max)	500 mOhm	500 mOhm	Equivalent
Package / Case	0402 (1005 Metric)	0402 (1005 Metric)	Equivalent
Mounting Type	Surface Mount	Surface Mount	Equivalent
Shielding	Unshielded	Unshielded	Equivalent
Type	Thin Film	Thin Film	Equivalent
Size / Dimension	0.039" L x 0.020" W (1.00mm x 0.50mm)	0.039" L x 0.020" W (1.00mm x 0.50mm)	Equivalent
Height - Seated (Max)	0.013" (0.33mm)	0.015" (0.37mm)	Substitute Higher
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Equivalent
Product Status	Obsolete	Active	Substitute Active

Engineering Selection Recommendations

The ATFC-0402HQ-4N7B-T from Abracon LLC is an active substitute for the obsolete HPL1005-4N7. The substitute maintains electrical equivalence in inductance value, DC resistance, and package configuration. Both components are ROHS3 compliant with MSL 1 ratings and REACH unaffected status, ensuring regulatory alignment.

The primary consideration for substitution is the current rating differential: the substitute is rated for 330 mA versus the original 500 mA specification. Circuit designs operating at or near the 500 mA threshold require evaluation to confirm that the reduced current rating of the substitute does not violate thermal or performance requirements.

Secondary considerations include the substitute's tighter inductance tolerance (±0.1 nH versus ±0.2 nH), which provides improved precision, and a marginal increase in seated height (0.015" versus 0.013"), which remains within standard 0402 package envelope specifications and does not present mechanical clearance issues in typical PCB layouts.

The substitute's active product status ensures ongoing availability and supply chain continuity compared to the obsolete original part.

Frequently Asked Questions (FAQ)

Q: Can the ATFC-0402HQ-4N7B-T directly replace the HPL1005-4N7 in all applications?

A: Direct replacement is possible for applications where circuit current requirements do not exceed 330 mA. Applications requiring the full 500 mA rating of the original part require circuit redesign or alternative component selection.

Q: What is the impact of the tighter inductance tolerance on circuit performance?

A: The ATFC-0402HQ-4N7B-T provides ±0.1 nH tolerance compared to ±0.2 nH for the HPL1005-4N7. This tighter tolerance improves inductance value consistency and may enhance circuit stability in applications sensitive to inductance variation. No negative impact results from this specification improvement.

Q: Are there mechanical compatibility concerns with the increased seated height?

A: The substitute height of 0.015" (0.37mm) remains within standard 0402 package specifications. PCB layouts designed for 0402 components accommodate this height without modification. Clearance verification is recommended only for applications with height-constrained assemblies.

Q: What compliance certifications apply to the substitute part?

A: The ATFC-0402HQ-4N7B-T is ROHS3 compliant, carries MSL 1 (unlimited moisture sensitivity level), and is REACH unaffected, matching the compliance profile of the original HPL1005-4N7.

Q: Is the substitute available in the same packaging format?

A: The ATFC-0402HQ-4N7B-T is supplied in Tape & Reel (TR) packaging, whereas the original part specification does not specify packaging format. Both are 0402 (1005 Metric) surface mount components compatible with automated assembly processes.

Q: How do the frequency characteristics compare between the two parts?

A: The HPL1005-4N7 operates at a self-resonant frequency of 6 GHz with Q of 13 at 300 MHz. The ATFC-0402HQ-4N7B-T operates at 7 GHz self-resonant frequency with Q of 16 at 500 MHz. The substitute exhibits superior high-frequency performance characteristics.

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