Equivalent & Substitute Parts for 1008HS-221EKFS

Part Overview

The 1008HS-221EKFS is a 220 nH unshielded drum core wirewound inductor manufactured by Delta Electronics/Components, rated for 1.2 A continuous current with 250 mOhm 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 1008HS-221EKFS carries an obsolete product status. Locating equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this inductance value and package form factor.

Key Parameters

Parameter	Value
Inductance	220 nH
Inductance Tolerance	±10%
Current Rating	1.2 A
DC Resistance (DCR)	250 mOhm
Core Type	Ferrite Drum Core, Wirewound
Shielding	Unshielded
Package / Case	1008 (2520 Metric)
Mounting Type	Surface Mount
Operating Temperature Range	-40°C to 85°C
Q @ Frequency	30 @ 25.2 MHz
Self Resonant Frequency	600 MHz
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the 1008HS-221EKFS are identified based on the following critical parameters that define functional equivalence:

Primary Matching Criteria:

Inductance value: 220 nH (core electrical specification)
Package / Case: 1008 (2520 Metric) (mechanical compatibility)
Core type: Ferrite drum core, wirewound (electrical performance characteristics)
Shielding: Unshielded (electromagnetic behavior)
Mounting type: Surface mount (assembly compatibility)
Frequency test point: 25.2 MHz (measurement standard)

Secondary Compatibility Parameters:

Operating temperature range overlap
RoHS and regulatory compliance status
Moisture sensitivity level

The substitute parts NLV25T-R22J-EF and NLV25T-R22J-EFD, both manufactured by TDK Corporation, match all primary criteria. Both are 220 nH ferrite drum core wirewound inductors in 1008 (2520 Metric) surface mount packages with identical Q factor at 25.2 MHz and unshielded construction.

Important Design Consideration: The substitute parts carry a lower current rating (430 mA) compared to the original part (1.2 A). Applications requiring the full 1.2 A rating must evaluate whether the 430 mA substitute is acceptable for the intended circuit function. The substitute parts also feature higher DC resistance (500 mOhm maximum) relative to the original specification (250 mOhm).

Parameter Comparison

Parameter	1008HS-221EKFS (Original)	NLV25T-R22J-EF (Substitute)	NLV25T-R22J-EFD (Substitute)
Manufacturer	Delta Electronics/Components	TDK Corporation	TDK Corporation
Inductance	220 nH	220 nH	220 nH
Inductance Tolerance	±10%	±5%	±5%
Current Rating (Amps)	1.2 A	430 mA	430 mA
DC Resistance (DCR)	250 mOhm	500 mOhm Max	500 mOhm Max
Core Type	Ferrite Drum Core, Wirewound	Ferrite Drum Core, Wirewound	Ferrite Drum Core, Wirewound
Shielding	Unshielded	Unshielded	Unshielded
Package / Case	1008 (2520 Metric)	1008 (2520 Metric)	1008 (2520 Metric)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Size / Dimension	0.115" L x 0.110" W (2.92mm x 2.79mm)	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)
Q @ Frequency	30 @ 25.2 MHz	30 @ 25.2 MHz	30 @ 25.2 MHz
Self Resonant Frequency	600 MHz	450 MHz	450 MHz
Operating Temperature Range	-40°C to 85°C	-40°C to 105°C	-40°C to 105°C
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Ratings	-	-	AEC-Q200

Engineering Selection Recommendations

NLV25T-R22J-EF Selection Criteria:

The NLV25T-R22J-EF is an active product from TDK Corporation with ROHS3 compliance and unlimited moisture sensitivity rating. This substitute maintains electrical equivalence in inductance value, core material, package form factor, and Q factor performance at the 25.2 MHz test frequency. The part is available in tape and reel packaging with confirmed inventory stock.

NLV25T-R22J-EFD Selection Criteria:

The NLV25T-R22J-EFD is functionally identical to the NLV25T-R22J-EF with the addition of AEC-Q200 automotive qualification rating. This substitute is suitable for applications requiring automotive-grade component certification. The part carries ROHS3 compliance and unlimited moisture sensitivity rating. Inventory availability is confirmed in tape and reel packaging.

Design Transition Considerations:

Both substitute parts feature tighter inductance tolerance (±5% versus ±10%), which may improve circuit performance in applications sensitive to inductance variation. The substitute parts operate across an extended temperature range (-40°C to 105°C) compared to the original specification (-40°C to 85°C), providing additional thermal margin.

The reduced current rating (430 mA) and doubled DC resistance (500 mOhm maximum) of the substitute parts represent the primary electrical differences. Circuit designs must confirm that these parameters remain within acceptable operating limits for the intended application. The smaller physical dimensions of the substitute parts (2.50mm x 2.00mm versus 2.92mm x 2.79mm) may provide board layout advantages.

Frequently Asked Questions (FAQ)

Q: Can NLV25T-R22J-EF and NLV25T-R22J-EFD be used interchangeably with 1008HS-221EKFS?

A: Both TDK substitutes match the critical electrical parameters: 220 nH inductance, ferrite drum core construction, unshielded configuration, and 1008 (2520 Metric) surface mount package. However, the reduced current rating (430 mA versus 1.2 A) and increased DC resistance (500 mOhm maximum versus 250 mOhm) must be evaluated against circuit requirements. If the application operates below 430 mA and can tolerate the higher resistance, substitution is electrically feasible.

Q: What is the difference between NLV25T-R22J-EF and NLV25T-R22J-EFD?

A: Both parts are electrically and mechanically identical 220 nH inductors in 1008 (2520 Metric) packages. The primary distinction is that NLV25T-R22J-EFD carries AEC-Q200 automotive qualification rating, making it suitable for automotive applications requiring this certification. The NLV25T-R22J-EF lacks this automotive rating.

Q: Are the physical dimensions compatible with the original 1008HS-221EKFS footprint?

A: The substitute parts are smaller (2.50mm x 2.00mm versus 2.92mm x 2.79mm) and have lower seated height (1.90mm versus 2.10mm). Both dimensions are within the 1008 (2520 Metric) package classification. PCB footprints designed for the original part will accommodate the substitute parts. However, the reduced size may provide additional board layout flexibility.

Q: Do the substitute parts meet RoHS and regulatory requirements?

A: Both NLV25T-R22J-EF and NLV25T-R22J-EFD are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1). Both carry EAR99 ECCN classification. The NLV25T-R22J-EFD includes AEC-Q200 automotive qualification. Regulatory compliance is maintained across both substitute options.

Q: How do the frequency characteristics compare?

A: Both substitute parts maintain identical Q factor (30 @ 25.2 MHz) as the original part, ensuring equivalent performance at the measurement frequency. The self-resonant frequency differs: the original part specifies 600 MHz while the substitutes specify 450 MHz. Applications operating near or above 450 MHz must evaluate this parameter against circuit requirements.

Q: What is the tolerance difference and does it matter?

A: The original part specifies ±10% inductance tolerance while the substitutes specify ±5%. The tighter tolerance of the substitute parts may improve circuit performance in applications sensitive to inductance variation, as the actual inductance value will remain closer to the nominal 220 nH specification.

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