1008HS-822EKFS Equivalent & Substitute Parts Reference

Part Overview

The 1008HS-822EKFS is an 8.2 µH unshielded drum core wirewound inductor manufactured by Delta Electronics/Components, rated for 250 mA with 1.8Ohm 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.

Substiute Parts

1008HS-822EKFS

Delta Electronics/ComponentsIn Stock: 11161008HS-822EKFS Datasheet

Current PartRFQ

744758382A

Würth ElektronikIn Stock: 1305744758382A Datasheet

DirectRFQ

NLV25T-8R2J-EF

TDK CorporationIn Stock: 1860NLV25T-8R2J-EF Datasheet

SimilarRFQ

NLV25T-8R2J-EFD

TDK CorporationIn Stock: 5810NLV25T-8R2J-EFD Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 1008HS-822EKFS is determined by the following critical parameters:

Primary Matching Criteria:

• Inductance value: 8.2 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)

Secondary Compatibility Criteria:

• Current rating: Must equal or exceed 250 mA
• DC resistance: Must not exceed 1.8Ohm nominal specification
• Operating temperature range: Must cover minimum -40°C ~ 85°C
• RoHS compliance: ROHS3 Compliant required

The substitute parts listed below satisfy the primary matching criteria. Secondary criteria variations are documented in the parameter comparison table to enable informed selection based on application requirements.

Parameter Comparison

Engineering Selection Recommendations

744758382A (Würth Elektronik WE-RFH Series)

This substitute provides the closest electrical performance match to the 1008HS-822EKFS. The 320 mA current rating exceeds the original 250 mA specification, providing operational margin. The 2.6Ohm maximum DC resistance represents a 44% increase over the original 1.8Ohm specification. The component maintains identical operating temperature range (-40°C ~ 85°C) and package dimensions are physically compatible with 1008 (2520 Metric) footprints. Active product status ensures long-term availability. ROHS3 compliance and MSL 1 rating match the original specification.

NLV25T-8R2J-EFD (TDK NLV-EFD Series)

This substitute is suitable for applications where automotive-grade qualification is required. The AEC-Q200 rating provides automotive reliability certification. The 160 mA current rating is below the original 250 mA specification and represents a significant derating. The 3.05Ohm maximum DC resistance represents a 69% increase over the original specification. Extended operating temperature range (-40°C ~ 105°C) exceeds original requirements. Active product status and higher inventory availability (5721 Pcs) support production continuity. ROHS3 compliance and MSL 1 rating match the original specification.

NLV25T-8R2J-EF (TDK NLV-EF Series)

This substitute shares identical electrical specifications with NLV25T-8R2J-EFD except for Q factor measurement frequency (2.52MHz vs. 7.96MHz) and lacks AEC-Q200 automotive qualification. The 160 mA current rating and 3.05Ohm DC resistance represent the same derating as the EFD variant. REACH status is affected, requiring compliance verification for specific applications. Active product status supports availability.

Frequently Asked Questions (FAQ)

Q: Can 744758382A directly replace 1008HS-822EKFS in all applications?

A: 744758382A matches the critical parameters of inductance value (8.2 µH), package (1008/2520 Metric), core type (ferrite unshielded drum core), and mounting type (surface mount). The 320 mA current rating exceeds the original 250 mA requirement. However, the DC resistance increases from 1.8Ohm to 2.6Ohm maximum. Applications sensitive to DC resistance or power dissipation must evaluate this 44% increase against circuit requirements.

Q: Why do the TDK NLV25T-8R2J series parts have lower current ratings?

A: The NLV25T-8R2J-EF and NLV25T-8R2J-EFD are rated for 160 mA, which is 36% below the original 250 mA specification. These parts are not suitable for applications requiring the full 250 mA current capacity. Selection of these parts requires circuit redesign or confirmation that actual operating current remains below 160 mA.

Q: What is the significance of the AEC-Q200 rating on NLV25T-8R2J-EFD?

A: AEC-Q200 is an automotive industry qualification standard. NLV25T-8R2J-EFD carries this certification; NLV25T-8R2J-EF does not. For automotive applications requiring AEC-Q200 compliance, only NLV25T-8R2J-EFD is qualified. Non-automotive applications do not require this certification.

Q: Are physical dimensions compatible across all substitute parts?

A: All substitute parts use the 1008 (2520 Metric) package. However, dimensional variations exist: the original 1008HS-822EKFS measures 0.115" L x 0.110" W x 0.083" H, while substitute parts measure 0.098" L x 0.079" W x 0.075" H. These smaller dimensions are physically compatible with 1008 footprints but may affect PCB layout if tight spacing is present. Verify PCB clearances before implementation.

Q: What is the impact of tolerance differences between ±10% and ±5%?

A: The original 1008HS-822EKFS specifies ±10% inductance tolerance. All substitute parts specify ±5% tolerance, representing tighter manufacturing control. This tighter tolerance improves circuit predictability and reduces performance variation across production batches. No negative impact results from this specification improvement.

Q: How does DC resistance affect circuit performance?

A: DC resistance directly impacts power dissipation and voltage drop across the inductor. The original 1.8Ohm specification increases to 2.6Ohm (744758382A) or 3.05Ohm (TDK parts). At 250 mA, the original dissipates 112.5 mW; 744758382A dissipates 162.5 mW; TDK parts dissipate 191.25 mW. Applications with thermal constraints or low-power requirements must evaluate this increased dissipation.

Q: Is the extended temperature range of TDK parts beneficial?

A: TDK NLV25T-8R2J series parts operate to 105°C versus the original 85°C maximum. This extended range provides margin for applications in elevated ambient conditions or high-power environments. However, if the original circuit design operates within -40°C ~ 85°C, the extended range provides no functional benefit.

Q: What does REACH Affected status mean for NLV25T-8R2J parts?

A: REACH Affected indicates the component contains substances of concern under EU REACH regulations. Compliance documentation and substance declarations are required for European Union applications. The original 1008HS-822EKFS is REACH Unaffected. Applications subject to REACH requirements must verify compliance documentation availability before selecting TDK parts.