1008HC-273EJFS Equivalent & Substitute Parts

Part Overview

The 1008HC-273EJFS is a 27 µH unshielded drum core wirewound inductor manufactured by Delta Electronics/Components, rated for 180 mA continuous current with 3.4 Ohm DC resistance. This surface mount component is packaged in the 1008 (2520 Metric) form factor and operates across the temperature range of -40°C to 85°C.

The 1008HC-273EJFS is classified as obsolete. Locating equivalent substitute parts is necessary to support ongoing production requirements, design revisions, and inventory replenishment where original stock becomes unavailable.

Substiute Parts

1008HC-273EJFS

Delta Electronics/ComponentsIn Stock: 6961008HC-273EJFS Datasheet

Current PartRFQ

NLV25T-270J-EF

TDK CorporationIn Stock: 2407NLV25T-270J-EF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1008HC-273EJFS are identified based on the following critical parameters:

Matching Parameters:

• Inductance value: 27 µH
• Inductance tolerance: ±5%
• Package / Case: 1008 (2520 Metric)
• Core type: Ferrite drum core, unshielded
• Mounting type: Surface mount
• Test frequency: 2.52 MHz
• RoHS3 compliance
• MSL rating: 1 (Unlimited)

Allowable Variations:

• Current rating: Substitute parts must support the application's current requirements; lower current ratings indicate reduced thermal margin
• DC resistance: Variations affect power dissipation and circuit performance
• Operating temperature range: Extended ranges provide additional design margin
• Product status: Active parts are preferred over obsolete classifications for long-term availability

The NLV25T-270J-EF from TDK Corporation meets all matching parameters and is classified as active, ensuring continued availability and supply chain support.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: NLV25T-270J-EF (TDK Corporation)

The NLV25T-270J-EF is the qualified equivalent for the 1008HC-273EJFS. Selection rationale:

1. Inductance Match: Both parts deliver 27 µH with ±5% tolerance at 2.52 MHz test frequency, ensuring functional equivalence in inductance-dependent circuit behavior.

2. Package Compatibility: Both components use the 1008 (2520 Metric) surface mount package with identical electrical connection points, enabling direct PCB layout compatibility.

3. Product Status: The NLV25T-270J-EF is classified as active, providing assured long-term availability and supply chain continuity compared to the obsolete 1008HC-273EJFS.

4. Regulatory Compliance: Both parts are ROHS3 compliant with MSL rating 1 (Unlimited), meeting environmental and moisture handling requirements.

5. Operating Temperature: The NLV25T-270J-EF extends the upper operating limit to 105°C, providing additional thermal margin beyond the 1008HC-273EJFS specification of 85°C.

Design Considerations for Substitution:

The NLV25T-270J-EF exhibits a current rating of 115 mA compared to the 1008HC-273EJFS rating of 180 mA. Applications operating at or above 115 mA require thermal analysis to confirm acceptable power dissipation. The NLV25T-270J-EF also presents higher DC resistance (6.3 Ohm maximum versus 3.4 Ohm), resulting in increased resistive losses. Circuit designs sensitive to inductor losses or operating near the 115 mA threshold require validation against actual application current profiles.

The NLV25T-270J-EF physical dimensions are slightly smaller (2.50mm x 2.00mm versus 2.92mm x 2.79mm), with reduced height (1.90mm versus 2.10mm), providing improved PCB layout density without affecting electrical performance.

Frequently Asked Questions (FAQ)

Q: Can the NLV25T-270J-EF directly replace the 1008HC-273EJFS in existing designs?

A: Direct replacement is possible for applications operating at or below 115 mA continuous current. The identical inductance value, tolerance, package type, and test frequency ensure functional equivalence. Applications exceeding 115 mA require thermal and performance validation due to the reduced current rating and increased DC resistance of the substitute part.

Q: What is the impact of the higher DC resistance in the NLV25T-270J-EF?

A: The NLV25T-270J-EF exhibits 6.3 Ohm maximum DC resistance compared to 3.4 Ohm in the 1008HC-273EJFS. At equivalent current levels, resistive power dissipation increases proportionally. For a 100 mA current, the NLV25T-270J-EF dissipates approximately 63 mW versus 34 mW in the original part. Circuit designs with tight thermal budgets or high-frequency switching applications require analysis to confirm acceptable operating conditions.

Q: Are the physical dimensions of the NLV25T-270J-EF compatible with existing PCB layouts?

A: Both parts conform to the 1008 (2520 Metric) package standard with identical pad patterns and electrical connection points. The NLV25T-270J-EF is physically smaller (2.50mm x 2.00mm versus 2.92mm x 2.79mm) and lower profile (1.90mm versus 2.10mm), providing improved layout density. No PCB redesign is required for substitution.

Q: What is the significance of the extended operating temperature range in the NLV25T-270J-EF?

A: The NLV25T-270J-EF operates to 105°C compared to 85°C for the 1008HC-273EJFS. This extended range provides additional thermal margin in applications subject to elevated ambient temperatures or self-heating effects. The extended range does not affect substitution compatibility; it represents an additional design benefit.

Q: Why is the NLV25T-270J-EF classified as active while the 1008HC-273EJFS is obsolete?

A: Product status reflects manufacturer support and supply availability. The 1008HC-273EJFS is no longer manufactured or supported by Delta Electronics/Components. The NLV25T-270J-EF remains in active production by TDK Corporation, ensuring continued availability, technical support, and supply chain reliability for new designs and production replenishment.

Q: Are there compliance or certification differences between the two parts?

A: Both parts are ROHS3 compliant with MSL rating 1 (Unlimited), meeting equivalent environmental and moisture handling standards. The NLV25T-270J-EF is REACH Affected while the 1008HC-273EJFS is REACH Unaffected; however, both parts satisfy current regulatory requirements for electronic component use.