1008HS-151EKFS Equivalent & Substitute Parts Reference

Part Overview

The 1008HS-151EKFS is a 150 nH unshielded drum core wirewound inductor manufactured by Delta Electronics/Components, rated for 1.2 A continuous current with 150 mOhm DC resistance. This surface mount component is designed for high-frequency applications with a self-resonant frequency of 800 MHz and operates across the -40°C to 85°C temperature range.

The 1008HS-151EKFS carries an obsolete product status. Equivalent substitute parts are necessary to maintain design continuity and ensure component availability for production, repair, and redesign applications where the original part is no longer procurable from primary sources.

Substiute Parts

1008HS-151EKFS

Delta Electronics/ComponentsIn Stock: 8411008HS-151EKFS Datasheet

Current PartRFQ

NLV25T-R15J-EF

TDK CorporationIn Stock: 4441NLV25T-R15J-EF Datasheet

SimilarRFQ

NLV25T-R15J-EFD

TDK CorporationIn Stock: 1757NLV25T-R15J-EFD Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1008HS-151EKFS is determined by the following critical parameters:

Mandatory Matching Parameters:

• Inductance value: 150 nH
• Package / Case: 1008 (2520 Metric)
• Core type: Ferrite drum core, wirewound
• Shielding configuration: Unshielded
• Mounting type: Surface Mount
• Inductance test frequency: 25.2 MHz

Allowable Parameter Variations:

• Current rating may be lower than the original 1.2 A specification
• DC resistance may exceed the original 150 mOhm value
• Operating temperature range may be extended
• Self-resonant frequency may differ
• Tolerance may be tighter than ±10%

The substitute parts NLV25T-R15J-EF and NLV25T-R15J-EFD, both manufactured by TDK Corporation, satisfy the mandatory matching parameters. Both substitutes maintain the 150 nH inductance, 1008 package format, ferrite drum core construction, and unshielded configuration. However, both substitutes feature reduced current ratings (500 mA versus 1.2 A) and increased DC resistance (350 mOhm maximum versus 150 mOhm).

Parameter Comparison

Engineering Selection Recommendations

NLV25T-R15J-EFD (Recommended for Automotive Applications)

The NLV25T-R15J-EFD is the preferred substitute when the application permits. This part maintains active product status with established supply chain availability. The AEC-Q200 automotive qualification rating provides additional reliability assurance for mission-critical applications. The extended operating temperature range (-40°C to 105°C) accommodates broader environmental conditions compared to the original 1008HS-151EKFS specification.

NLV25T-R15J-EF (Alternative for Non-Automotive Applications)

The NLV25T-R15J-EF serves as an alternative substitute for applications where automotive qualification is not required. This part is also in active production status with confirmed inventory availability. Both TDK substitutes feature tighter inductance tolerance (±5% versus ±10%), which may provide improved circuit performance in precision applications.

Critical Design Considerations

Both substitute parts operate at reduced current ratings (500 mA maximum versus 1.2 A). Circuit designs must verify that the application current does not exceed 500 mA continuous operation. The increased DC resistance (350 mOhm maximum versus 150 mOhm) will result in higher power dissipation and must be evaluated against thermal management requirements. The lower self-resonant frequency (550 MHz versus 800 MHz) may affect high-frequency performance characteristics.

Physical dimensions differ between the original and substitute parts. The TDK substitutes are smaller (2.50mm x 2.00mm versus 2.92mm x 2.79mm), which may require PCB layout verification to ensure mechanical compatibility and clearance with adjacent components.

Frequently Asked Questions (FAQ)

Q: Can NLV25T-R15J-EF and NLV25T-R15J-EFD be used interchangeably?

A: Both parts share identical electrical specifications (150 nH inductance, 500 mA current rating, 350 mOhm maximum DCR, 30 Q @ 25.2 MHz). The primary difference is the AEC-Q200 automotive qualification rating on the NLV25T-R15J-EFD. Selection depends on application requirements. For automotive or mission-critical applications, the NLV25T-R15J-EFD is specified. For general industrial or consumer applications, either part is acceptable.

Q: What is the impact of the reduced current rating on circuit design?

A: The substitute parts are rated for 500 mA maximum continuous current, compared to 1.2 A for the original 1008HS-151EKFS. If the application circuit draws current exceeding 500 mA through the inductor, the substitute parts will saturate and fail to maintain the specified inductance value. Circuit current must be verified and limited to 500 mA or below for reliable operation.

Q: How does the increased DC resistance affect circuit performance?

A: The substitute parts specify 350 mOhm maximum DCR compared to 150 mOhm for the original part. This 200 mOhm increase results in higher resistive losses and power dissipation. In applications sensitive to insertion loss or power efficiency, this parameter change must be evaluated. Power dissipation increases proportionally to the square of the circuit current multiplied by the resistance increase.

Q: Are the physical dimensions compatible with existing PCB layouts?

A: The substitute parts are physically smaller (2.50mm x 2.00mm versus 2.92mm x 2.79mm length and width). While both parts use the 1008 (2520 Metric) package designation, the actual footprint dimensions differ. Existing PCB layouts designed for the original 1008HS-151EKFS may require verification to confirm adequate clearance and mechanical fit with the smaller TDK substitutes.

Q: What is the significance of the AEC-Q200 rating on the NLV25T-R15J-EFD?

A: AEC-Q200 is an automotive electronics qualification standard that specifies reliability and quality requirements for passive components used in automotive applications. The NLV25T-R15J-EFD meets this qualification, making it suitable for automotive designs where component reliability and traceability are mandated. The NLV25T-R15J-EF does not carry this qualification.

Q: How do the tolerance specifications compare?

A: The original 1008HS-151EKFS specifies ±10% inductance tolerance. Both TDK substitutes specify ±5% tolerance, which is tighter. This tighter tolerance may improve circuit performance in applications where inductance precision is critical, such as impedance matching networks or resonant circuits.

Q: What is the difference in self-resonant frequency between the parts?

A: The original part specifies 800 MHz self-resonant frequency, while both substitutes specify 550 MHz. This 250 MHz difference may affect performance in high-frequency applications operating near or above the self-resonant frequency. Applications operating above 550 MHz should verify that the substitute parts maintain acceptable performance characteristics.

Q: Are all parts RoHS3 compliant?

A: Yes, all three parts (1008HS-151EKFS, NLV25T-R15J-EF, and NLV25T-R15J-EFD) are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity level rating, indicating no special moisture handling requirements during storage or assembly.