ELL-CTV121M Equivalent & Substitute Parts

Part Overview

The ELL-CTV121M is a 120 µH shielded drum core, wirewound inductor manufactured by Panasonic Electronic Components. Rated for 1.1 A with 190mOhm DC resistance, this surface mount component is designed for applications requiring fixed inductance in compact form factors. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for ongoing production and repair applications.

Key Parameters

Parameter	Value
Inductance	120 µH
Inductance Tolerance	±20%
Current Rating	1.1 A
DC Resistance (DCR)	190mOhm
Core Material	Ferrite
Shielding	Shielded
Mounting Type	Surface Mount
Package Type	Nonstandard
Inductance Test Frequency	100 kHz
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the ELL-CTV121M is determined by strict equivalence across the following electrical and mechanical parameters:

Inductance Value: 120 µH (primary electrical specification)
Inductance Tolerance: ±20% (acceptable variation range)
Current Rating: Minimum 1.1 A (load capacity requirement)
DC Resistance: Maximum acceptable DCR for circuit performance
Core Material: Ferrite (electromagnetic performance characteristic)
Shielding: Shielded configuration (EMI containment requirement)
Mounting Type: Surface Mount (assembly compatibility)
Package Classification: Nonstandard (physical form factor)

Substitute parts must satisfy all primary electrical parameters while maintaining mechanical compatibility with the original mounting footprint and height constraints.

Parameter Comparison

Parameter	ELL-CTV121M (Panasonic)	CDRR107NP-121MC (Sumida)	PA4303.124NLT (Pulse Electronics)
Inductance	120 µH	120 µH	120 µH
Inductance Tolerance	±20%	±20%	±20%
Current Rating (Amps)	1.1 A	1.34 A	1.1 A
DC Resistance (DCR)	190mOhm	200mOhm Max	358mOhm Max
Core Material	Ferrite	Ferrite	Ferrite
Shielding	Shielded	Shielded	Shielded
Type	Drum Core, Wirewound	Drum Core	Drum Core, Wirewound
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	Nonstandard	Nonstandard	Nonstandard
Size / Dimension (L x W)	0.472" x 0.472" (12.00mm x 12.00mm)	0.433" x 0.433" (11.00mm x 11.00mm)	0.492" x 0.492" (12.50mm x 12.50mm)
Height - Seated (Max)	0.177" (4.50mm)	0.394" (10.00mm)	0.197" (5.00mm)
Product Status	Obsolete	Active	Active
Operating Temperature	Not specified	-40°C ~ 125°C	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant	Not specified	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	Not specified	1 (Unlimited)

Engineering Selection Recommendations

CDRR107NP-121MC (Sumida America Components Inc.)

This substitute maintains electrical equivalence with 120 µH inductance and ±20% tolerance. Current rating of 1.34 A exceeds the original 1.1 A requirement, providing operational margin. DC resistance of 200mOhm Max is within acceptable tolerance of the original 190mOhm specification. The part is active status with AEC-Q200 rating, supporting automotive and industrial applications. Operating temperature range of -40°C ~ 125°C is specified. Physical dimensions (11.00mm x 11.00mm footprint, 10.00mm height) differ from the original, requiring PCB layout verification before implementation.

PA4303.124NLT (Pulse Electronics)

This substitute provides electrical equivalence with 120 µH inductance and ±20% tolerance at the original 1.1 A current rating. DC resistance of 358mOhm Max represents a significant increase from the original 190mOhm, introducing additional power dissipation in the circuit. The part is active status with ROHS3 compliance and REACH Unaffected designation. Operating temperature range of -40°C ~ 125°C is specified. Physical dimensions (12.50mm x 12.50mm footprint, 5.00mm height) are comparable to the original, with height slightly increased. Inductance test frequency of 1 kHz differs from the original 100 kHz specification.

Frequently Asked Questions (FAQ)

Q: Can CDRR107NP-121MC be used as a direct replacement for ELL-CTV121M?

A: CDRR107NP-121MC meets the core electrical specifications (120 µH, ±20% tolerance, ferrite core, shielded). However, physical dimensions differ: footprint is 11.00mm x 11.00mm versus 12.00mm x 12.00mm, and height is 10.00mm versus 4.50mm. PCB layout and clearance verification is required before substitution.

Q: What is the impact of higher DC resistance in PA4303.124NLT?

A: PA4303.124NLT has 358mOhm Max DCR compared to the original 190mOhm. This increases resistive losses and power dissipation in the inductor. Circuit thermal analysis should confirm acceptable operating conditions at the intended current level.

Q: Are both substitutes RoHS compliant?

A: PA4303.124NLT is explicitly ROHS3 compliant. CDRR107NP-121MC RoHS status is not specified in the provided data.

Q: Do the substitutes have specified operating temperature ranges?

A: Both CDRR107NP-121MC and PA4303.124NLT specify -40°C ~ 125°C operating temperature. The original ELL-CTV121M operating temperature is not specified.

Q: What is the significance of different inductance test frequencies?

A: ELL-CTV121M and CDRR107NP-121MC use 100 kHz test frequency, while PA4303.124NLT uses 1 kHz. Inductance values may vary slightly at different frequencies due to core material characteristics. Circuit operating frequency should be considered when selecting between these parts.

Q: Are moisture sensitivity levels specified for all parts?

A: ELL-CTV121M and PA4303.124NLT both specify MSL 1 (Unlimited). CDRR107NP-121MC MSL is not specified in the provided data.

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