HCT-371 Equivalent & Substitute Parts

Part Overview

The HCT-371 is a 1.25 µH shielded toroidal inductor manufactured by API Delevan Inc., rated for 17.4 A continuous current with a maximum DC resistance of 2.5 mOhm. This component is designed for surface mount applications requiring low-inductance, high-current filtering and energy storage in power conversion circuits.

The HCT-371 carries an obsolete product status. Locating equivalent substitute parts is necessary to support ongoing production requirements, field repairs, and system maintenance where this inductor specification remains functionally required.

Substiute Parts

HCT-371

API Delevan Inc.In Stock: 701HCT-371 Datasheet

Current PartRFQ

PE-53690NL

Pulse ElectronicsIn Stock: 1039PE-53690NL Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HCT-371 are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

• Inductance value within tolerance band
• Current rating sufficient for application requirements
• DC resistance at or below specified maximum
• Surface mount toroidal package form factor
• Physical dimensions compatible with PCB layout constraints
• Operating temperature range covering application environment

Secondary Compatibility Factors:

• Shielding characteristics (shielded vs. unshielded)
• Core material composition
• Frequency response characteristics
• RoHS and regulatory compliance status

The PE-53690NL is listed as a direct substitute based on API Delevan Inc. documentation. However, this part exhibits differences in inductance value (810 nH vs. 1.25 µH), current rating (14.3 A vs. 17.4 A), and shielding configuration (unshielded vs. shielded) that must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The HCT-371 is classified as obsolete, while the PE-53690NL maintains active production status. This distinction is significant for long-term supply chain planning and component availability.

Compliance Status: The PE-53690NL is ROHS3 compliant, whereas the HCT-371 is non-compliant. Applications subject to RoHS regulatory requirements must use the PE-53690NL or identify alternative compliant inductors.

Functional Differences: The PE-53690NL exhibits lower inductance (810 nH vs. 1.25 µH) and reduced current rating (14.3 A vs. 17.4 A). These differences directly impact circuit performance in applications where inductance value and current capacity are critical design parameters. The unshielded configuration of the PE-53690NL may introduce different electromagnetic coupling characteristics compared to the shielded HCT-371.

Selection Basis: Component selection must be based on circuit-specific requirements for inductance tolerance, current handling capacity, thermal environment, and electromagnetic shielding needs. The physical dimensions and mounting characteristics are compatible between parts.

Frequently Asked Questions (FAQ)

Q: Can the PE-53690NL directly replace the HCT-371 in all applications?

A: No. The PE-53690NL has lower inductance (810 nH vs. 1.25 µH) and lower current rating (14.3 A vs. 17.4 A). Direct substitution is only valid when circuit design tolerates these parameter reductions and does not require the shielded configuration of the HCT-371.

Q: What is the significance of the shielding difference?

A: The HCT-371 is shielded; the PE-53690NL is unshielded. Shielding reduces electromagnetic radiation and susceptibility to external fields. Applications requiring EMI suppression or operating in electromagnetically noisy environments may require the shielded configuration.

Q: Are the physical dimensions compatible?

A: Yes. Both parts are toroidal inductors with nearly identical footprints (HCT-371: 15.62mm × 15.24mm; PE-53690NL: 15.75mm × 15.37mm) and identical seated height (9.40 mm). PCB layout compatibility is maintained.

Q: What is the impact of the RoHS compliance difference?

A: The PE-53690NL is ROHS3 compliant; the HCT-371 is not. Applications subject to RoHS regulations must use compliant components. The HCT-371 may only be used in applications exempt from RoHS requirements.

Q: How do the current ratings affect component selection?

A: The HCT-371 is rated for 17.4 A; the PE-53690NL for 14.3 A. If the application requires continuous current exceeding 14.3 A, the PE-53690NL cannot be used. Verify actual circuit current requirements before substitution.

Q: What is the inductance tolerance impact?

A: The HCT-371 specifies ±25% tolerance. The PE-53690NL tolerance is not provided in available data. Circuit designs must account for inductance variation and verify that the 810 nH value (with tolerance) meets filter or energy storage requirements.

Q: Is the PE-53690NL the only available substitute?

A: Based on provided data, the PE-53690NL is listed as the direct substitute. Additional equivalent inductors may exist from other manufacturers with matching specifications, but they are not included in this reference.