1210HS-331EJFS Equivalent & Substitute Parts Reference

Part Overview

The 1210HS-331EJFS is a 330 nH unshielded drum core wirewound inductor manufactured by Delta Electronics/Components. This surface mount component is rated for 530 mA continuous current with a DC resistance of 250 mOhm and operates across the temperature range of -40°C to 85°C. The part is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing design requirements and procurement needs.

Substiute Parts

1210HS-331EJFS

Delta Electronics/ComponentsIn Stock: 8311210HS-331EJFS Datasheet

Current PartRFQ

NLV32T-R33J-EF

TDK CorporationIn Stock: 2942NLV32T-R33J-EF Datasheet

SimilarRFQ

NLV32T-R33J-EFD

TDK CorporationIn Stock: 1664NLV32T-R33J-EFD Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 1210HS-331EJFS are identified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Critical Matching Parameters:

• Inductance value: 330 nH with ±5% tolerance
• Package / Case: 1210 (3225 Metric) surface mount
• Core material: Ferrite drum core, unshielded configuration
• Physical dimensions compatible with 1210 footprint
• Inductance test frequency: 25.2 MHz

Acceptable Parameter Variations:

• Current rating: Substitute parts rated at 450 mA are acceptable for applications requiring ≤450 mA operation
• DC resistance: Substitute parts with 400 mOhm maximum are acceptable where circuit design accommodates increased resistance
• Operating temperature: Extended range (-40°C to 105°C) provides broader operational capability
• Self resonant frequency: Variation from 400 MHz to 300 MHz acceptable within RF circuit design parameters

The identified substitutes NLV32T-R33J-EF and NLV32T-R33J-EFD from TDK Corporation meet these criteria while offering active product status and improved availability.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: NLV32T-R33J-EFD

The NLV32T-R33J-EFD is the preferred substitute for the obsolete 1210HS-331EJFS. This part maintains identical inductance specifications (330 nH ±5%) and package footprint (1210 / 3225 Metric) while offering active product status and extended availability. The NLV32T-R33J-EFD carries AEC-Q200 automotive qualification, providing additional reliability assurance for applications requiring automotive-grade components. The extended operating temperature range (-40°C to 105°C) accommodates broader environmental conditions compared to the original part.

Secondary Substitute: NLV32T-R33J-EF

The NLV32T-R33J-EF provides an equivalent alternative with identical electrical specifications to the NLV32T-R33J-EFD variant. This part is suitable for applications where AEC-Q200 qualification is not required. Both TDK substitutes are currently in active production with substantial inventory availability.

Design Considerations for Substitution:

Applications operating at or near the 530 mA current rating of the original part require circuit analysis to confirm compatibility with the 450 mA rating of substitute parts. The increased DC resistance (400 mOhm maximum versus 250 mOhm) results in higher power dissipation and must be evaluated within thermal design parameters. The reduced Q factor (30 versus 35 at 25.2 MHz) and lower self resonant frequency (300 MHz versus 400 MHz) may impact RF circuit performance and require circuit simulation for high-frequency applications.

Frequently Asked Questions (FAQ)

Q: Can NLV32T-R33J-EF and NLV32T-R33J-EFD be used interchangeably?

A: Yes. Both parts share identical electrical specifications (330 nH inductance, 450 mA current rating, 400 mOhm DCR) and physical dimensions (1210 package). The primary difference is AEC-Q200 qualification on the NLV32T-R33J-EFD variant. Selection depends on whether automotive-grade certification is required for the application.

Q: What is the impact of the 80 mOhm increase in DC resistance?

A: The substitute parts specify 400 mOhm maximum DCR compared to 250 mOhm for the original part. This 150 mOhm increase results in higher resistive losses. Power dissipation increases proportionally with current squared (P = I²R). At 450 mA operation, this represents approximately 81 mW additional dissipation. Circuit thermal design must accommodate this increase.

Q: Are the substitute parts compatible with the original 1210 footprint?

A: Yes. Both NLV32T-R33J-EF and NLV32T-R33J-EFD use the 1210 (3225 Metric) package with identical mounting type (surface mount). Physical dimensions are compatible with existing PCB layouts designed for the 1210HS-331EJFS.

Q: What is the significance of the reduced Q factor in substitute parts?

A: The original part specifies Q = 35 at 25.2 MHz, while substitutes specify Q = 30. This 5-point reduction indicates slightly higher losses at the test frequency. For RF and high-frequency applications, this may impact filter performance, impedance matching, or resonant circuit behavior. Circuit simulation is necessary to confirm performance in frequency-dependent applications.

Q: Can these parts be used in applications requiring the full 530 mA rating?

A: No. Substitute parts are rated for 450 mA maximum continuous current. Applications requiring sustained operation above 450 mA must use the original 1210HS-331EJFS or identify alternative parts with higher current ratings. Operating substitute parts above their rated current causes accelerated component degradation and thermal runaway.

Q: What is the difference between the extended temperature range of substitute parts?

A: The original part operates from -40°C to 85°C. Substitute parts extend the upper limit to 105°C. This 20°C extension provides operational capability in higher-temperature environments. Applications operating within the original -40°C to 85°C range experience no functional difference.

Q: Are there compliance differences between the original and substitute parts?

A: All parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. The NLV32T-R33J-EFD carries AEC-Q200 automotive qualification, which the original part does not specify. REACH status differs: the original part is REACH Unaffected, while substitutes are REACH Affected. Verify compliance requirements for your specific application and regulatory jurisdiction.