1008HS-473EKFS Equivalent & Substitute Parts Reference

Part Overview

The 1008HS-473EKFS is a 47 µH unshielded drum core wirewound inductor manufactured by Delta Electronics/Components, rated for 120 mA continuous current with 5.9 Ohm DC resistance. This surface mount component is designed for 1008 (2520 Metric) package applications operating across -40°C to 85°C temperature range.

The 1008HS-473EKFS 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.

Key Parameters

Parameter	Value	Unit
Inductance	47	µH
Inductance Tolerance	±10%	-
Current Rating	120	mA
DC Resistance (DCR)	5.9	Ohm
Core Type	Ferrite Drum Core	-
Shielding	Unshielded	-
Package / Case	1008 (2520 Metric)	-
Mounting Type	Surface Mount	-
Operating Temperature Range	-40°C to 85°C	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the 1008HS-473EKFS are identified based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

Inductance value: 47 µH (fixed specification)
Package / Case: 1008 (2520 Metric) (physical compatibility requirement)
Core material: Ferrite (electromagnetic performance characteristic)
Shielding configuration: Unshielded (EMI profile match)
Mounting type: Surface Mount (assembly compatibility)
Test frequency: 2.52 MHz (measurement standard)

Secondary Compatibility Parameters:

Operating temperature range: Minimum -40°C to 85°C coverage
RoHS3 compliance: Environmental regulation requirement
Inductance tolerance: ±5% to ±10% acceptable range
Current rating: Application-dependent selection criterion
DC resistance: Performance and thermal characteristic

Substitute parts must maintain the 47 µH inductance specification and 1008 package form factor. Variations in current rating, DC resistance, and tolerance are acceptable provided the substitute part meets or exceeds the application requirements for the specific circuit implementation.

Parameter Comparison

Parameter	1008HS-473EKFS (Main)	744762447A (Würth)	NLV25T-470J-EF (TDK)	NLV25T-470J-EFD (TDK)
Manufacturer	Delta Electronics	Würth Elektronik	TDK Corporation	TDK Corporation
Inductance	47 µH	47 µH	47 µH	47 µH
Inductance Tolerance	±10%	±5%	±5%	±5%
Current Rating	120 mA	45 mA	80 mA	80 mA
DC Resistance (DCR)	5.9 Ohm	14 Ohm Max	11.1 Ohm Max	11.1 Ohm Max
Q @ 2.52 MHz	18	15	20	20
Self Resonant Frequency	14 MHz	17 MHz	17 MHz	17 MHz
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 105°C	-40°C to 105°C
Package / Case	1008 (2520 Metric)	1008 (2520 Metric)	1008 (2520 Metric)	1008 (2520 Metric)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Ratings	-	-	-	AEC-Q200

Engineering Selection Recommendations

744762447A (Würth Elektronik WE-RFI Series)

This substitute is suitable for applications where the current requirement does not exceed 45 mA. The part features improved inductance tolerance (±5% versus ±10%) and maintains identical operating temperature range (-40°C to 85°C). DC resistance of 14 Ohm maximum is higher than the original specification. Active product status ensures long-term availability. ROHS3 compliance is confirmed.

NLV25T-470J-EF (TDK NLV-EF Series)

This substitute accommodates current ratings up to 80 mA, providing intermediate current capacity between the Würth option and the original specification. Operating temperature range extends to 105°C, exceeding the original -40°C to 85°C specification. Inductance tolerance is ±5%. DC resistance is 11.1 Ohm maximum. Active product status and ROHS3 compliance are confirmed. REACH status is affected.

NLV25T-470J-EFD (TDK NLV-EFD Series)

This substitute provides identical electrical specifications to the NLV25T-470J-EF variant with the addition of AEC-Q200 automotive qualification rating. Current rating is 80 mA with 11.1 Ohm maximum DC resistance. Operating temperature range is -40°C to 105°C. Active product status, ROHS3 compliance, and AEC-Q200 certification are confirmed. REACH status is affected.

Selection Criteria by Application:

For applications requiring the full 120 mA current capacity of the original part, none of the listed substitutes provide equivalent current rating. The NLV25T-470J-EF and NLV25T-470J-EFD options support 80 mA maximum, while the 744762447A supports 45 mA maximum.

For applications operating within 45 mA current limits, the 744762447A provides the closest thermal and electrical match with identical temperature range.

For applications requiring extended temperature operation to 105°C or automotive-grade qualification, the NLV25T-470J-EFD is specified with AEC-Q200 certification.

Frequently Asked Questions (FAQ)

Q: Can the 744762447A replace the 1008HS-473EKFS in all applications?

A: The 744762447A is suitable only for applications where circuit current does not exceed 45 mA. The original 1008HS-473EKFS is rated for 120 mA. If the application requires the full 120 mA current capacity, this substitute is not appropriate. Verify actual circuit current requirements before selection.

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

A: The 1008HS-473EKFS specifies 5.9 Ohm DC resistance. The 744762447A has 14 Ohm maximum, while both TDK options have 11.1 Ohm maximum. Higher DC resistance increases power dissipation in the inductor. For applications sensitive to thermal performance or power loss, circuit analysis is required to confirm acceptability of the higher resistance values.

Q: Are the TDK NLV25T-470J-EF and NLV25T-470J-EFD parts interchangeable?

A: Both parts share identical electrical specifications (47 µH, 80 mA, 11.1 Ohm DCR, ±5% tolerance). The primary difference is that NLV25T-470J-EFD includes AEC-Q200 automotive qualification rating. Both are active products with ROHS3 compliance. Selection depends on whether automotive qualification is required for the application.

Q: Does the extended temperature range of TDK parts affect compatibility?

A: The TDK NLV25T-470J-EF and NLV25T-470J-EFD parts operate to 105°C maximum, compared to the original 85°C maximum. This extended range is a superset of the original specification and does not create compatibility issues. Applications operating within the original -40°C to 85°C range are fully compatible.

Q: What is the significance of the 1008 (2520 Metric) package designation?

A: All substitute parts maintain the 1008 (2520 Metric) package form factor, ensuring physical compatibility with PCB layouts designed for the original 1008HS-473EKFS. Package dimensions are equivalent across all listed parts, supporting direct board-level substitution without layout modification.

Q: How do inductance tolerance differences affect circuit performance?

A: The original part specifies ±10% tolerance, while all substitute parts specify ±5% tolerance. Tighter tolerance in substitutes provides improved inductance consistency. For circuits sensitive to inductance variation, the ±5% tolerance of substitute parts may provide performance benefits. No circuit redesign is required due to tighter tolerance.

Q: Is REACH compliance status a critical factor for part selection?

A: The original 1008HS-473EKFS lists REACH status as unaffected. The TDK parts (NLV25T-470J-EF and NLV25T-470J-EFD) list REACH status as affected. The Würth 744762447A lists REACH status as unaffected. For applications subject to REACH regulatory requirements, verify compliance status against specific application regulations before final part selection.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message