ELL-ATV121M Equivalent & Substitute Parts

Part Overview

The ELL-ATV121M is a 120 µH shielded drum core, wirewound inductor manufactured by Panasonic Electronic Components. Designed for surface mount applications, this component delivers 840 mA current rating with 190mOhm DC resistance in a compact 10.00mm × 10.00mm footprint. The part is classified as obsolete, necessitating identification of active equivalent components to maintain design continuity and ensure long-term supply chain reliability for new production and field replacements.

Substiute Parts

ELL-ATV121M

Panasonic Electronic ComponentsIn Stock: 754ELL-ATV121M Datasheet

Current PartRFQ

ASPI-104S-121M-T

Abracon LLCIn Stock: 1116ASPI-104S-121M-T Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ELL-ATV121M is determined by strict equivalence across the following critical parameters:

Inductance Value: Both main and substitute parts must provide 120 µH at 100 kHz test frequency with ±20% tolerance.

Core Material & Shielding: Ferrite material with shielded drum core construction is required to maintain electromagnetic isolation and performance characteristics.

Mounting Technology: Surface mount configuration with nonstandard package dimensions (approximately 10mm × 10mm footprint).

Current Handling: The substitute must support the application's current requirements. The ELL-ATV121M operates at 840 mA; substitutes with equal or higher current ratings are acceptable.

DC Resistance: DCR values must be compatible with circuit design specifications. The ELL-ATV121M specifies 190mOhm; substitutes with comparable or lower DCR are functionally equivalent.

Compliance & Environmental: ROHS3 compliance and MSL 1 rating ensure regulatory alignment and handling compatibility.

The ASPI-104S-121M-T from Abracon LLC meets all substitution criteria while offering improved specifications and active product status.

Parameter Comparison

Engineering Selection Recommendations

The ASPI-104S-121M-T is the qualified substitute for the obsolete ELL-ATV121M based on the following engineering criteria:

Functional Equivalence: Both components deliver identical 120 µH inductance at 100 kHz with ±20% tolerance, ensuring circuit performance parity.

Enhanced Current Capability: The ASPI-104S-121M-T provides 1.08 A current rating with 1.2 A saturation current, exceeding the ELL-ATV121M's 840 mA specification. This improvement provides design margin and supports higher-power applications.

Compliance Alignment: Both parts maintain ROHS3 compliance and MSL 1 rating, satisfying regulatory and manufacturing requirements without process modification.

Active Product Status: The ASPI-104S-121M-T is actively manufactured by Abracon LLC, ensuring long-term availability and supply chain continuity compared to the obsolete ELL-ATV121M.

Physical Compatibility: Dimensional differences are minimal (10.10mm vs. 10.00mm length; 4.00mm vs. 4.50mm height). PCB layout verification is recommended for height-constrained applications.

DC Resistance Consideration: The ASPI-104S-121M-T specifies 350mOhm maximum DCR compared to the ELL-ATV121M's 190mOhm. Circuit designs sensitive to inductor losses require thermal and efficiency analysis to confirm acceptable performance.

Frequently Asked Questions (FAQ)

Q: Can the ASPI-104S-121M-T directly replace the ELL-ATV121M without circuit modification?

A: The ASPI-104S-121M-T is functionally equivalent for inductance value and core type. However, the higher DCR (350mOhm vs. 190mOhm) and different physical dimensions require verification. Conduct circuit simulation to confirm acceptable power loss and thermal performance. PCB layout must accommodate the 10.10mm × 10.00mm footprint and 4.00mm height.

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

A: Increased DCR results in higher resistive losses, particularly in high-current applications. Power dissipation increases proportionally to I²R. For the 840 mA design point, losses increase from approximately 134 mW (ELL-ATV121M) to 247 mW (ASPI-104S-121M-T). Thermal analysis is necessary for designs operating near thermal limits.

Q: Are there dimensional compatibility issues between these parts?

A: The ASPI-104S-121M-T is slightly longer (10.10mm vs. 10.00mm) and shorter in height (4.00mm vs. 4.50mm). For most applications, these differences are negligible. Height-constrained designs must verify clearance. Length differences may require minor PCB layout adjustment if component spacing is tight.

Q: Does the ASPI-104S-121M-T provide saturation current specifications?

A: Yes. The ASPI-104S-121M-T specifies 1.2 A saturation current, providing defined performance limits under transient overcurrent conditions. The ELL-ATV121M does not specify saturation current, making this additional data valuable for circuit protection design.

Q: What is the packaging difference, and does it affect procurement?

A: The ELL-ATV121M uses nonstandard packaging; the ASPI-104S-121M-T is supplied in Tape & Reel (TR) format. TR packaging is standard for automated assembly and offers better handling and storage characteristics. This improves manufacturing efficiency and reduces component damage risk.

Q: Are both parts suitable for the same operating temperature range?

A: The ASPI-104S-121M-T specifies -40°C to 85°C operating range. The ELL-ATV121M does not provide temperature specifications. For applications requiring extended temperature operation, the ASPI-104S-121M-T's defined range provides design certainty.