1008HS-273EJFS Equivalent & Substitute Parts

Part Overview

The 1008HS-273EJFS is a 27 µH 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 180 mA current rating with 3.5Ohm DC resistance and is characterized by a self-resonant frequency of 17 MHz.

The 1008HS-273EJFS has reached obsolete product status. 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-273EJFS

Delta Electronics/ComponentsIn Stock: 8701008HS-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 1008HS-273EJFS are identified based on the following critical parameters that must align for functional equivalence:

Mandatory Matching Parameters:

• Inductance value: 27 µH (±5% tolerance)
• Package classification: 1008 (2520 Metric)
• Core material: Ferrite
• Core type: Drum Core, Wirewound
• Shielding configuration: Unshielded
• Mounting type: Surface Mount
• Frequency test point: 2.52 MHz

Allowable Variation Parameters:

• Current rating: Substitute must support minimum 180 mA operation
• DC resistance: Substitute DCR must be compatible with circuit design requirements
• Operating temperature range: Substitute must cover or exceed -40°C ~ 85°C
• Self-resonant frequency: Substitute must maintain adequate frequency margin above operating frequency
• Compliance certifications: RoHS3 compliance required

The NLV25T-270J-EF from TDK Corporation meets the mandatory matching criteria and qualifies as a functional substitute.

Parameter Comparison

Engineering Selection Recommendations

The NLV25T-270J-EF qualifies as a functional substitute for the 1008HS-273EJFS based on the following engineering criteria:

Compliance and Availability: The NLV25T-270J-EF maintains ROHS3 compliance and active product status, ensuring long-term supply chain viability compared to the obsolete 1008HS-273EJFS. Both components carry MSL Level 1 (Unlimited) moisture sensitivity classification.

Electrical Equivalence: Both inductors share identical inductance (27 µH), tolerance (±5%), core material (ferrite), core type (drum core wirewound), shielding configuration (unshielded), and frequency test point (2.52 MHz). These parameters establish functional equivalence for inductance-dependent circuit operation.

Parameter Deviations Requiring Circuit Analysis: The NLV25T-270J-EF exhibits a lower current rating (115 mA versus 180 mA) and higher DC resistance (6.3 Ohm maximum versus 3.5 Ohm). Circuit designs must confirm that operating current does not exceed 115 mA and that the increased DCR does not introduce unacceptable power dissipation or voltage drop. The substitute's extended operating temperature range (-40°C ~ 105°C) and higher self-resonant frequency (21 MHz) provide performance advantages in thermal and high-frequency applications.

Packaging and Mounting: Both components utilize identical 1008 (2520 Metric) surface mount packages with matching physical dimensions and mounting characteristics, enabling direct PCB footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can the NLV25T-270J-EF directly replace the 1008HS-273EJFS without circuit modification?

A: Direct replacement is possible only if circuit operating current remains below 115 mA and the increased DC resistance (6.3 Ohm maximum) does not violate circuit performance specifications. The identical inductance value, tolerance, package, and core configuration support mechanical and electrical compatibility. However, circuit validation is required to confirm current and resistance parameters are acceptable.

Q: What is the significance of the current rating difference between these inductors?

A: The 1008HS-273EJFS is rated for 180 mA continuous current, while the NLV25T-270J-EF is rated for 115 mA. If the application circuit draws current exceeding 115 mA, the substitute inductor will operate outside its rated specification, potentially causing saturation, thermal stress, or premature failure. Circuit current analysis must confirm operation within the 115 mA limit.

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

A: The NLV25T-270J-EF exhibits 6.3 Ohm maximum DC resistance compared to 3.5 Ohm for the original part. This 80% increase in resistance results in higher power dissipation (P = I²R) and increased voltage drop across the inductor. Applications sensitive to power loss or voltage regulation must evaluate whether this resistance increase is acceptable.

Q: Are the physical dimensions compatible for PCB assembly?

A: Both inductors use the 1008 (2520 Metric) package with surface mount configuration. The 1008HS-273EJFS measures 0.115" L × 0.110" W × 0.083" H maximum, while the NLV25T-270J-EF measures 0.098" L × 0.079" W × 0.075" H maximum. The substitute is physically smaller and will fit the same PCB footprint without modification.

Q: What compliance certifications apply to both inductors?

A: Both the 1008HS-273EJFS and NLV25T-270J-EF are ROHS3 compliant and carry MSL Level 1 (Unlimited) moisture sensitivity classification. The NLV25T-270J-EF is REACH Affected, while the original part is REACH Unaffected. Applications subject to REACH regulations must confirm compliance requirements.

Q: Why is the substitute inductor rated for higher temperature operation?

A: The NLV25T-270J-EF operates across -40°C ~ 105°C, extending 20°C above the original 1008HS-273EJFS specification (-40°C ~ 85°C). This extended range provides thermal margin for applications operating in elevated ambient conditions or with higher component self-heating. Applications operating within the original -40°C ~ 85°C range experience no thermal limitation with the substitute.

Q: What is the significance of the higher self-resonant frequency in the substitute?

A: The NLV25T-270J-EF exhibits a self-resonant frequency of 21 MHz compared to 17 MHz for the original inductor. Higher self-resonant frequency indicates better high-frequency performance characteristics and reduced parasitic capacitance effects. Applications operating near the inductor's resonant frequency benefit from the substitute's improved frequency margin.