1008HS-682EJFS Equivalent & Substitute Parts

Part Overview

The 1008HS-682EJFS is a 6.8 µH unshielded drum core wirewound inductor manufactured by Delta Electronics/Components, rated for 300 mA continuous current with 1.6Ohm DC resistance. This surface mount component is housed in a 1008 (2520 Metric) package and operates across the temperature range of -40°C to 85°C. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives from active product lines to maintain design continuity and ensure supply chain availability.

Substiute Parts

1008HS-682EJFS

Delta Electronics/ComponentsIn Stock: 10571008HS-682EJFS Datasheet

Current PartRFQ

744758368A

Würth ElektronikIn Stock: 1457744758368A Datasheet

DirectRFQ

744762368A

Würth ElektronikIn Stock: 1951744762368A Datasheet

SimilarRFQ

NLV25T-6R8J-EF

TDK CorporationIn Stock: 5696NLV25T-6R8J-EF Datasheet

SimilarRFQ

NLV25T-6R8J-EFD

TDK CorporationIn Stock: 903NLV25T-6R8J-EFD Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1008HS-682EJFS is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 6.8 µH (exact match required)
• Inductance tolerance: ±5% (exact match required)
• Package / Case: 1008 (2520 Metric) (exact match required)
• Core type: Ferrite, unshielded drum core (exact match required)
• Mounting type: Surface mount (exact match required)
• Test frequency: 7.96 MHz (exact match required)

Secondary Compatibility Criteria:

• Current rating: Must equal or exceed 300 mA
• DC resistance: Must be compatible with circuit design requirements
• Operating temperature range: Must encompass or exceed -40°C ~ 85°C
• RoHS3 compliance: Required for regulatory alignment
• Moisture sensitivity level: MSL 1 acceptable

The substitute parts listed below satisfy all primary matching criteria. Secondary criteria variations are documented to enable informed selection based on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

744758368A (Würth Elektronik WE-RFH Series)

This part provides the highest current rating (360 mA) among available substitutes, exceeding the original 300 mA specification. The 2.0Ohm maximum DC resistance represents a minimal increase from the original 1.6Ohm. Operating temperature range matches the original specification (-40°C ~ 85°C). This option is suitable for applications where current headroom is beneficial and DC resistance tolerance is acceptable. Active product status ensures long-term availability.

744762368A (Würth Elektronik WE-RFI Series)

This part operates at 165 mA current rating, which is below the original 300 mA specification. The 2.8Ohm maximum DC resistance represents a significant increase. This option is suitable only for applications where the actual operating current does not exceed 165 mA and where increased DC resistance is tolerable. Active product status ensures availability. Selection of this part requires verification that circuit current requirements do not exceed the 165 mA rating.

NLV25T-6R8J-EF (TDK Corporation NLV-EF Series)

This part operates at 165 mA current rating, below the original 300 mA specification. The 2.7Ohm maximum DC resistance is comparable to the Würth WE-RFI option. Operating temperature range extends to 105°C, providing enhanced thermal margin. Active product status ensures availability. Selection requires confirmation that operating current remains below 165 mA. Physical dimensions are slightly smaller than the original part.

NLV25T-6R8J-EFD (TDK Corporation NLV-EFD Series)

This part operates at 165 mA current rating, below the original 300 mA specification. The 2.7Ohm maximum DC resistance matches the NLV25T-6R8J-EF variant. Operating temperature range extends to 105°C. This variant includes AEC-Q200 automotive qualification rating, suitable for automotive and high-reliability applications. Active product status ensures availability. Physical dimensions are slightly smaller than the original part. Selection requires confirmation that operating current remains below 165 mA.

Frequently Asked Questions (FAQ)

Q: Can the 744758368A directly replace the 1008HS-682EJFS without circuit modification?

A: The 744758368A matches all primary electrical parameters (6.8 µH inductance, ±5% tolerance, 1008 package, ferrite core, surface mount). The 360 mA current rating exceeds the original 300 mA specification. The 2.0Ohm maximum DC resistance is slightly higher than the original 1.6Ohm. Direct substitution is permissible if the circuit design accommodates the increased DC resistance. Physical dimensions are slightly smaller, which may affect PCB layout.

Q: Why do the TDK parts (NLV25T-6R8J-EF and NLV25T-6R8J-EFD) have lower current ratings?

A: The TDK NLV-EF and NLV-EFD series are designed with different core and winding configurations, resulting in 165 mA current ratings compared to the original 300 mA. These parts are suitable only for applications where the actual circuit current does not exceed 165 mA. Current rating is a fundamental design parameter and cannot be exceeded without risk of inductor saturation and performance degradation.

Q: What is the difference between NLV25T-6R8J-EF and NLV25T-6R8J-EFD?

A: Both parts share identical electrical specifications (6.8 µH, 165 mA, 2.7Ohm DCR, ±5% tolerance). The primary difference is that the NLV25T-6R8J-EFD includes AEC-Q200 automotive qualification rating, making it suitable for automotive and high-reliability applications. The NLV25T-6R8J-EF is the standard industrial variant. Selection between these variants depends on application requirements for automotive qualification.

Q: Are all substitute parts RoHS3 compliant?

A: All substitute parts listed are ROHS3 compliant, matching the original part's regulatory status. This ensures compatibility with RoHS3 requirements for new designs and replacements.

Q: What is the impact of increased DC resistance in substitute parts?

A: DC resistance directly affects power dissipation and voltage drop across the inductor. The original part exhibits 1.6Ohm DCR. Substitute parts range from 2.0Ohm to 2.8Ohm maximum. At 300 mA, the original part dissipates 0.144W, while a 2.0Ohm substitute dissipates 0.18W, and a 2.8Ohm substitute dissipates 0.252W. Circuit thermal design must accommodate increased dissipation if higher-resistance substitutes are selected.

Q: Can the 744762368A or TDK parts be used in a 300 mA application?

A: No. The 744762368A, NLV25T-6R8J-EF, and NLV25T-6R8J-EFD are rated for 165 mA maximum continuous current. Operating these parts at 300 mA exceeds their current rating and results in inductor saturation, performance degradation, and potential thermal failure. These parts are suitable only for applications where actual operating current does not exceed 165 mA.

Q: How do physical dimension differences affect PCB layout?

A: The original 1008HS-682EJFS measures 2.92mm x 2.79mm with 2.10mm seated height. The Würth 744758368A measures 2.60mm x 2.10mm with 1.90mm seated height. The TDK parts measure 2.50mm x 2.00mm with 1.90mm seated height. Smaller substitute parts may require PCB layout adjustment, particularly for high-density designs. Verify PCB footprint compatibility before implementation.

Q: What is the significance of the 70 MHz self-resonant frequency in the 744758368A?

A: The 744758368A exhibits a 70 MHz self-resonant frequency compared to 39 MHz in the original and other substitutes. Higher self-resonant frequency indicates extended usable frequency range before the inductor transitions to capacitive behavior. This characteristic may be beneficial in high-frequency applications but does not affect substitution eligibility for standard RF and filtering applications operating below 40 MHz.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Yes. All substitute parts are supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes. The original part packaging specification was not provided, but TR packaging is standard for surface mount inductors in this category.