1008HS-271EJFS Equivalent & Substitute Parts

Part Overview

The 1008HS-271EJFS is a 270 nH unshielded drum core wirewound inductor manufactured by Delta Electronics/Components, designed for surface mount applications in the 1008 (2520 Metric) package. This component operates at 1.2 A current rating with 300 mOhm DC resistance and is specified for use at frequencies up to 25.2 MHz with a self-resonant frequency of 425 MHz.

The 1008HS-271EJFS carries an obsolete product status. Identification of equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production, repair, and redesign applications where this inductor was originally specified.

Substiute Parts

1008HS-271EJFS

Delta Electronics/ComponentsIn Stock: 8761008HS-271EJFS Datasheet

Current PartRFQ

NLV25T-R27J-EF

TDK CorporationIn Stock: 5905NLV25T-R27J-EF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1008HS-271EJFS is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 270 nH ±5%
• Package / Case: 1008 (2520 Metric)
• Mounting Type: Surface Mount
• Core Material: Ferrite
• Shielding: Unshielded

Secondary Compatibility Factors:

• Operating temperature range must encompass the original specification minimum of -40°C
• Frequency characteristics (Q @ 25.2 MHz and self-resonant frequency) must be equivalent
• RoHS3 compliance status

Application-Dependent Considerations:

• Current rating and DC resistance values determine circuit-specific suitability
• Higher current ratings and lower DCR values provide design margin
• Lower current ratings and higher DCR values require circuit re-evaluation

The substitute part NLV25T-R27J-EF matches all primary criteria and maintains equivalent frequency characteristics. However, differences in current rating (420 mA vs. 1.2 A) and DC resistance (550 mOhm Max vs. 300 mOhm) require application-level assessment.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The NLV25T-R27J-EF qualifies as an equivalent substitute for the 1008HS-271EJFS based on matching inductance value, package form factor, core material, and frequency characteristics. Both components maintain ROHS3 compliance and unlimited moisture sensitivity rating.

Status and Availability Advantage:

The NLV25T-R27J-EF carries active product status with 5798 pieces in stock inventory, compared to the obsolete 1008HS-271EJFS with limited remaining stock of 836 pieces. This availability differential supports long-term supply chain continuity.

Electrical Performance Considerations:

The substitute part operates at reduced current rating (420 mA versus 1.2 A) and exhibits higher DC resistance (550 mOhm maximum versus 300 mOhm). These differences are acceptable only in applications where circuit current requirements do not exceed 420 mA and where the increased resistive loss does not compromise system performance or thermal management.

Temperature Range Extension:

The NLV25T-R27J-EF extends the upper operating temperature limit to 105°C, providing additional thermal margin beyond the original specification of 85°C.

Compliance Status:

Both components satisfy ROHS3 requirements. The substitute part carries REACH Affected status, whereas the original part is REACH Unaffected. Regulatory compliance verification is required for applications subject to REACH restrictions.

Frequently Asked Questions (FAQ)

Q: Can the NLV25T-R27J-EF directly replace the 1008HS-271EJFS in all applications?

A: Direct replacement is possible only in applications where the circuit current does not exceed 420 mA. If the original design requires the full 1.2 A current capability, the substitute part is not suitable without circuit modification.

Q: What is the impact of the higher DC resistance in the substitute part?

A: The NLV25T-R27J-EF exhibits 550 mOhm maximum DC resistance compared to 300 mOhm in the original part. This 250 mOhm increase results in higher resistive losses and increased heat dissipation. Power loss impact scales with the square of the operating current. At 420 mA, the additional loss is approximately 44 mW compared to the original part at the same current level.

Q: Are the package dimensions identical between the two parts?

A: Both components use the 1008 (2520 Metric) package designation. However, physical dimensions differ slightly. The 1008HS-271EJFS measures 0.115" L x 0.110" W x 0.083" H (2.92mm x 2.79mm x 2.10mm), while the NLV25T-R27J-EF measures 0.098" L x 0.079" W x 0.075" H (2.50mm x 2.00mm x 1.90mm). The substitute part is physically smaller and may require PCB layout verification for clearance compatibility.

Q: Do both parts have identical frequency characteristics?

A: Yes. Both the 1008HS-271EJFS and NLV25T-R27J-EF maintain Q factor of 30 at 25.2 MHz and self-resonant frequency of 425 MHz. Frequency response characteristics are equivalent.

Q: What is the significance of the REACH status difference?

A: The original part is REACH Unaffected, while the substitute is REACH Affected. Applications subject to REACH compliance requirements must verify that the substitute part meets applicable regulatory restrictions for the intended market and application.

Q: Is the extended temperature range of the substitute part beneficial?

A: The NLV25T-R27J-EF operates to 105°C compared to 85°C for the original part. This extension provides additional thermal margin in high-temperature environments but does not affect applications operating within the original -40°C to 85°C specification.

Q: What packaging format is available for the substitute part?

A: The NLV25T-R27J-EF is supplied in Tape & Reel (TR) format, suitable for automated assembly processes. Verify that your procurement and assembly processes accommodate this packaging format.