Equivalent & Substitute Parts for 1008HC-682EKFS

Part Overview

The 1008HC-682EKFS is a 6.8 µH unshielded drum core wirewound inductor manufactured by Delta Electronics/Components, rated for 400 mA with 1 Ohm DC resistance in a 1008 (2520 Metric) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional compatibility within specified electrical and mechanical parameters.

Key Parameters

Parameter	Value
Inductance	6.8 µH
Current Rating	400 mA
DC Resistance (DCR)	1 Ohm
Package / Case	1008 (2520 Metric)
Core Type	Ferrite, Unshielded, Drum Core
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the 1008HC-682EKFS is determined by the following mandatory parameters:

Primary Compatibility Criteria:

Inductance value: 6.8 µH (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)
RoHS3 compliance (required for regulatory alignment)

Secondary Compatibility Criteria:

Current rating: Substitute must support minimum 400 mA application requirement
DC resistance: Substitute DCR must not exceed circuit design tolerance
Operating temperature range: Substitute must cover minimum -40°C ~ 85°C
Frequency characteristics: Test frequency 7.96 MHz maintained across alternatives

The substitute parts identified (744758368A, 744762368A, NLV25T-6R8J-EF, NLV25T-6R8J-EFD) satisfy all primary criteria. Secondary criteria variations are documented in the parameter comparison table to enable circuit-specific selection.

Parameter Comparison

Parameter	1008HC-682EKFS (Main)	744758368A (Würth)	744762368A (Würth)	NLV25T-6R8J-EF (TDK)	NLV25T-6R8J-EFD (TDK)
Manufacturer	Delta Electronics	Würth Elektronik	Würth Elektronik	TDK Corporation	TDK Corporation
Inductance	6.8 µH	6.8 µH	6.8 µH	6.8 µH	6.8 µH
Tolerance	±10%	±5%	±5%	±5%	±5%
Current Rating (Amps)	400 mA	360 mA	165 mA	165 mA	165 mA
DC Resistance (DCR)	1 Ohm	2 Ohm Max	2.8 Ohm Max	2.7 Ohm Max	2.7 Ohm Max
Q @ Freq (7.96 MHz)	22	20	20	25	25
Frequency - Self Resonant	40 MHz	70 MHz	39 MHz	39 MHz	39 MHz
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 105°C
Package / Case	1008 (2520 Metric)	1008 (2520 Metric)	1008 (2520 Metric)	1008 (2520 Metric)	1008 (2520 Metric)
Size / Dimension	0.115" L x 0.110" W (2.92mm x 2.79mm)	0.102" L x 0.083" W (2.60mm x 2.10mm)	0.102" L x 0.083" W (2.60mm x 2.10mm)	0.098" L x 0.079" W (2.50mm x 2.00mm)	0.098" L x 0.079" W (2.50mm x 2.00mm)
Height - Seated (Max)	0.083" (2.10mm)	0.075" (1.90mm)	0.075" (1.90mm)	0.075" (1.90mm)	0.075" (1.90mm)
Product Status	Obsolete	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Ratings	-	-	-	-	AEC-Q200
Inventory Status	831 Pcs New Original In Stock	1349 Pcs New Original In Stock	1920 Pcs New Original In Stock	5589 Pcs New Original In Stock	809 Pcs New Original In Stock

Engineering Selection Recommendations

744758368A (Würth Elektronik WE-RFH Series)

This substitute is suitable for applications where the current requirement does not exceed 360 mA. The 360 mA rating represents a 10% reduction from the original 400 mA specification. The DCR of 2 Ohm Max is elevated compared to the original 1 Ohm specification. This part maintains active product status and ROHS3 compliance. Selection is appropriate for designs with current headroom or where the 360 mA threshold is acceptable.

744762368A (Würth Elektronik WE-RFI Series)

This substitute is limited to applications requiring maximum 165 mA current. The 165 mA rating represents a 59% reduction from the original 400 mA specification. The DCR of 2.8 Ohm Max is significantly elevated. This part is suitable only for low-current applications and should not be selected for designs requiring the full 400 mA capability. Active product status and ROHS3 compliance are maintained.

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

This substitute is limited to applications requiring maximum 165 mA current. The 165 mA rating represents a 59% reduction from the original 400 mA specification. The DCR of 2.7 Ohm Max is significantly elevated. Extended operating temperature range (-40°C ~ 105°C) provides additional thermal margin. Active product status and ROHS3 compliance are maintained. Higher inventory availability (5589 Pcs) supports supply chain continuity.

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

This substitute is limited to applications requiring maximum 165 mA current. The 165 mA rating represents a 59% reduction from the original 400 mA specification. The DCR of 2.7 Ohm Max is significantly elevated. Extended operating temperature range (-40°C ~ 105°C) and AEC-Q200 automotive qualification provide additional compliance certifications. Active product status and ROHS3 compliance are maintained.

Frequently Asked Questions (FAQ)

Q: Can 744758368A directly replace 1008HC-682EKFS in all applications?

A: 744758368A is suitable only for applications where circuit current does not exceed 360 mA. If the design requires the full 400 mA capability of the original part, this substitute is not appropriate. The elevated DCR (2 Ohm Max vs. 1 Ohm) must be evaluated against circuit design tolerances.

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 for 165 mA maximum current applications. These parts are not suitable for designs requiring 400 mA operation. Selection of these parts is appropriate only for low-current circuit implementations.

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, 2.7 Ohm Max DCR). The primary difference is that NLV25T-6R8J-EFD carries AEC-Q200 automotive qualification. Selection between these variants depends on whether automotive-grade certification is required for the application.

Q: Are the physical dimensions of substitute parts compatible with the original PCB layout?

A: All substitute parts maintain the 1008 (2520 Metric) package designation. However, dimensional variations exist: the original 1008HC-682EKFS measures 0.115" L x 0.110" W, while substitute parts measure 0.102" L x 0.083" W or 0.098" L x 0.079" W. Height differences also exist (0.083" original vs. 0.075" substitutes). PCB footprint verification is required before implementation.

Q: Which substitute part offers the best supply chain availability?

A: NLV25T-6R8J-EF (TDK) provides the highest inventory level at 5589 Pcs. This part is suitable for low-current applications (165 mA maximum). For higher current requirements (360 mA), 744758368A (Würth) offers 1349 Pcs availability.

Q: Do all substitute parts maintain RoHS3 compliance?

A: All identified substitute parts are ROHS3 compliant. The original 1008HC-682EKFS is also ROHS3 compliant, ensuring regulatory alignment across all alternatives.

Q: What is the impact of increased DCR on circuit performance?

A: The original part specifies 1 Ohm DCR. Substitute parts range from 2 Ohm to 2.8 Ohm maximum DCR. This increase affects power dissipation and voltage drop across the inductor. Circuit analysis is required to determine whether the elevated DCR is acceptable for the specific application.

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