1008HS-271EKFS Equivalent & Substitute Parts

Part Overview

The 1008HS-271EKFS 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 300mOhm DC resistance and is characterized by a ferrite core construction with ±10% inductance tolerance.

The 1008HS-271EKFS is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this inductor specification.

Substiute Parts

1008HS-271EKFS

Delta Electronics/ComponentsIn Stock: 11301008HS-271EKFS Datasheet

Current PartRFQ

NLV25T-R27J-EF

TDK CorporationIn Stock: 5905NLV25T-R27J-EF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1008HS-271EKFS must satisfy the following critical parameters to ensure functional equivalence:

Mandatory Matching Parameters:

• Inductance value: 270 nH
• Package designation: 1008 (2520 Metric)
• Core type: Ferrite, drum core, wirewound construction
• Shielding configuration: Unshielded
• Mounting type: Surface mount
• Self resonant frequency: 425MHz
• Q factor @ 25.2MHz: 30

Allowable Variation Parameters:

• Current rating: Substitute must support minimum 1.2 A operation
• DC resistance: Substitute DCR must not exceed application thermal and loss requirements
• Inductance tolerance: ±5% or ±10% acceptable
• Operating temperature range: Substitute minimum range -40°C ~ 85°C
• Compliance certifications: ROHS3 and MSL Level 1 required

The NLV25T-R27J-EF from TDK Corporation meets these substitution criteria while maintaining identical inductance, package, core construction, and frequency characteristics.

Parameter Comparison

Engineering Selection Recommendations

Primary Consideration: Current Rating Differential

The NLV25T-R27J-EF substitute part carries a maximum current rating of 420 mA, compared to the 1008HS-271EKFS rating of 1.2 A. This represents a significant reduction in current handling capacity. Substitution is permissible only in applications where the actual operating current does not exceed 420 mA. For circuits requiring the full 1.2 A capability of the original part, the NLV25T-R27J-EF is not suitable.

Secondary Consideration: DC Resistance

The NLV25T-R27J-EF exhibits a maximum DC resistance of 550mOhm, compared to 300mOhm for the 1008HS-271EKFS. This increased resistance results in higher power dissipation and thermal generation at equivalent current levels. Applications sensitive to inductor losses or thermal performance must account for this parameter difference.

Compliance and Supply Status

Both parts maintain ROHS3 compliance and MSL Level 1 moisture sensitivity ratings. The NLV25T-R27J-EF is classified as active product status with substantial inventory availability (5798 Pcs), whereas the 1008HS-271EKFS is obsolete. The TDK substitute provides extended operating temperature range (-40°C ~ 105°C versus -40°C ~ 85°C), offering improved thermal margin for elevated ambient conditions.

Physical Dimensions

The NLV25T-R27J-EF occupies a smaller footprint (2.50mm x 2.00mm versus 2.92mm x 2.79mm) with reduced height (1.90mm versus 2.10mm). PCB layout compatibility must be verified for space-constrained applications.

Frequently Asked Questions (FAQ)

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

A: No. The NLV25T-R27J-EF is suitable only for applications where the operating current does not exceed 420 mA. The original part supports 1.2 A operation. If your circuit requires current levels between 420 mA and 1.2 A, the substitute part will not function within specification.

Q: What is the impact of the higher DC resistance in the NLV25T-R27J-EF?

A: The 550mOhm maximum DCR of the NLV25T-R27J-EF compared to 300mOhm of the original part increases resistive losses. At 420 mA, the TDK part dissipates approximately 97 mW, while the Delta part at the same current dissipates approximately 53 mW. Thermal design and power budget calculations must account for this difference.

Q: Are the package dimensions compatible?

A: Both parts use the 1008 (2520 Metric) package designation. However, the NLV25T-R27J-EF has smaller actual dimensions (2.50mm x 2.00mm versus 2.92mm x 2.79mm) and lower height (1.90mm versus 2.10mm). PCB footprints designed for the original part will accommodate the substitute, but the substitute occupies less board space.

Q: What is the significance of the ±5% tolerance in the NLV25T-R27J-EF versus ±10% in the original?

A: The TDK substitute provides tighter inductance tolerance (±5% versus ±10%), resulting in more consistent inductance values across production batches. This is advantageous for applications requiring precise inductance specifications.

Q: Does the extended operating temperature range of the NLV25T-R27J-EF provide any advantage?

A: The NLV25T-R27J-EF operates to 105°C maximum, compared to 85°C for the original part. This extended range provides additional thermal margin in high-temperature environments, though it does not compensate for the reduced current rating.

Q: Is the NLV25T-R27J-EF available in the same packaging format?

A: The NLV25T-R27J-EF is supplied in Tape & Reel (TR) format, while the original part packaging format is not specified in the provided data. Both parts are surface mount components suitable for automated assembly processes.

Q: What compliance certifications apply to the NLV25T-R27J-EF?

A: The NLV25T-R27J-EF is ROHS3 compliant, MSL Level 1 (Unlimited moisture sensitivity), and REACH Affected. The original 1008HS-271EKFS is ROHS3 compliant, MSL Level 1, and REACH Unaffected. Both parts carry EAR99 ECCN classification.