AISC-1210H-681K-T Equivalent & Substitute Parts

Part Overview

The AISC-1210H-681K-T is a 680 µH unshielded drum core wirewound inductor manufactured by Abracon LLC, rated for 40 mA maximum current with 40Ohm DC resistance in a 1210 (3225 Metric) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure supply chain availability for new production and repair applications.

Substiute Parts

AISC-1210H-681K-T

Abracon LLCIn Stock: 890AISC-1210H-681K-T Datasheet

Current PartRFQ

NLFV32T-681K-EF

TDK CorporationIn Stock: 3304NLFV32T-681K-EF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the AISC-1210H-681K-T is determined by the following critical parameters:

• Inductance Value: 680 µH (exact match required)
• Tolerance: ±10% (matching tolerance specification)
• Package / Case: 1210 (3225 Metric) (identical footprint and mounting)
• Mounting Type: Surface Mount (consistent assembly process)
• Core Material: Ferrite (electrical performance baseline)

The NLFV32T-681K-EF qualifies as a substitute based on matching inductance, tolerance, package, and core material. Variations in current rating, DC resistance, shielding configuration, and operating temperature range represent design trade-offs that must be evaluated against specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

The NLFV32T-681K-EF is the designated substitute for the obsolete AISC-1210H-681K-T based on matching core electrical specifications: identical 680 µH inductance, ±10% tolerance, and 1210 (3225 Metric) package footprint. Both components are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for current production.

The substitute exhibits a lower current rating (25 mA versus 40 mA) and reduced DC resistance (22.2Ohm versus 40Ohm), which represent improved electrical characteristics suitable for low-current applications. The shielded configuration of the substitute provides additional electromagnetic isolation compared to the unshielded original. The extended operating temperature range (-40°C ~ 105°C) of the substitute accommodates broader environmental conditions.

Selection of the NLFV32T-681K-EF requires circuit-level validation to confirm that the 25 mA current rating and 22.2Ohm DCR are compatible with the intended application. Active product status and established supply chain availability through TDK Corporation support long-term design continuity.

Frequently Asked Questions (FAQ)

Q: Can the NLFV32T-681K-EF directly replace the AISC-1210H-681K-T in existing designs?

A: Direct replacement is possible from a mechanical and electrical standpoint due to matching inductance (680 µH), tolerance (±10%), and package (1210 / 3225 Metric). However, the lower current rating (25 mA versus 40 mA) and reduced DC resistance (22.2Ohm versus 40Ohm) must be validated against circuit requirements to ensure the substitute operates within specified limits.

Q: What is the significance of the shielding difference between these parts?

A: The AISC-1210H-681K-T is unshielded, while the NLFV32T-681K-EF is shielded. Shielding reduces electromagnetic radiation and susceptibility to external fields. In applications sensitive to EMI, the shielded substitute may provide improved performance. In applications where shielding is not required, both configurations are functionally equivalent for inductance delivery.

Q: Are both parts compliant with current regulatory standards?

A: Yes. Both the AISC-1210H-681K-T and NLFV32T-681K-EF are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and use.

Q: What is the impact of the different operating temperature ranges?

A: The AISC-1210H-681K-T operates from -25°C to 85°C, while the NLFV32T-681K-EF operates from -40°C to 105°C. The substitute supports a wider temperature envelope. Applications requiring operation below -25°C or above 85°C must use the substitute. For applications within the original range, both parts are suitable.

Q: Why is the AISC-1210H-681K-T classified as obsolete?

A: Obsolete status indicates the part is no longer manufactured or supported by Abracon LLC. The NLFV32T-681K-EF, maintained as an active product by TDK Corporation, provides equivalent functionality with assured long-term availability for new designs and production continuity.