ELL-CTV271M Equivalent & Substitute Parts

Part Overview

The ELL-CTV271M is a 270 µH shielded drum core, wirewound inductor manufactured by Panasonic Electronic Components. Rated for 810 mA with 400mOhm 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 within the same parameter envelope.

Key Parameters

Parameter	Value
Inductance	270 µH
Current Rating	810 mA
DC Resistance (DCR)	400mOhm
Tolerance	±20%
Core Material	Ferrite
Shielding	Shielded
Mounting Type	Surface Mount
Package Type	Nonstandard
Size	12.00mm x 12.00mm
Height (Max)	4.50mm
Test Frequency	100 kHz

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following criteria:

Inductance Value: Must be 270 µH (±20% tolerance acceptable)
Current Rating: Must meet or exceed 810 mA minimum
DC Resistance: Must not exceed 400mOhm significantly to maintain circuit performance
Core Material: Ferrite construction required
Shielding: Shielded configuration mandatory
Mounting: Surface mount only
Package Footprint: Nonstandard 12.00mm x 12.00mm base dimension
Test Frequency: 100 kHz reference standard

All three substitute parts meet these core electrical parameters while offering active product status and enhanced specifications in current rating and/or DC resistance performance.

Parameter Comparison

Parameter	ELL-CTV271M (Main)	CDRH125/LDNP-271MC	CDRR107NP-271MC	SRR1260-271K
Manufacturer	Panasonic	Sumida America	Sumida America	Bourns Inc.
Inductance	270 µH	270 µH	270 µH	270 µH
Current Rating (Amps)	810 mA	940 mA	890 mA	1.3 A
DC Resistance (DCR)	400mOhm	520mOhm Max	390mOhm Max	450mOhm Max
Tolerance	±20%	±20%	±20%	±10%
Core Material	Ferrite	Ferrite	Ferrite	Ferrite
Shielding	Shielded	Shielded	Shielded	Shielded
Type	Drum Core, Wirewound	Shielded Inductor	Drum Core	Drum Core, Wirewound
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Size (L x W)	12.00mm x 12.00mm	12.00mm x 12.00mm	11.00mm x 11.00mm	12.50mm x 12.50mm
Height (Max)	4.50mm	6.00mm	10.00mm	6.50mm
Product Status	Obsolete	Active	Active	Active
Operating Temperature	Not specified	-40°C ~ 100°C	-40°C ~ 125°C	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant

Engineering Selection Recommendations

CDRR107NP-271MC (Sumida America Components Inc.) provides the closest electrical match with 390mOhm maximum DC resistance, which is lower than the original 400mOhm specification. This part carries AEC-Q200 automotive qualification and operates across -40°C to 125°C. The 11.00mm x 11.00mm footprint is slightly smaller than the original, and the 10.00mm maximum height represents a significant increase from 4.50mm, requiring PCB layout verification.

SRR1260-271K (Bourns Inc.) offers the highest current rating at 1.3 A with improved tolerance (±10%) and includes published Q and self-resonant frequency specifications. The 12.50mm x 12.50mm footprint is marginally larger than the original, and the 6.50mm height is moderately increased. This part is suitable for applications requiring enhanced performance margins.

CDRH125/LDNP-271MC (Sumida America Components Inc.) provides a direct footprint match at 12.00mm x 12.00mm with 940 mA current rating. The 520mOhm maximum DC resistance exceeds the original specification and should be evaluated against circuit requirements. Operating temperature range is -40°C to 100°C.

All three substitutes maintain ROHS3 compliance and ferrite shielded construction. Selection should prioritize height constraints and DC resistance tolerance requirements specific to the application.

Frequently Asked Questions (FAQ)

Q: Can CDRR107NP-271MC be used as a direct replacement despite the smaller footprint?

A: The 11.00mm x 12.00mm footprint is smaller than the original 12.00mm x 12.00mm. PCB layout compatibility must be verified. The significantly increased height (10.00mm vs. 4.50mm) may present clearance issues in space-constrained designs.

Q: Why does SRR1260-271K have a higher current rating than the original part?

A: The SRR1260-271K is designed with enhanced specifications. The 1.3 A rating provides additional performance margin. This does not affect backward compatibility; the part can be used in applications rated for 810 mA.

Q: What is the impact of DC resistance variation among substitutes?

A: The original ELL-CTV271M specifies 400mOhm. CDRR107NP-271MC at 390mOhm is lower (favorable for power dissipation). CDRH125/LDNP-271MC at 520mOhm and SRR1260-271K at 450mOhm are higher. Circuit analysis is required if DC resistance directly affects performance or thermal characteristics.

Q: Are all substitutes suitable for automotive applications?

A: CDRR107NP-271MC carries AEC-Q200 qualification. CDRH125/LDNP-271MC and SRR1260-271K do not list automotive certifications in the provided specifications. Verify application requirements before selection.

Q: What is the significance of the ±10% tolerance on SRR1260-271K versus ±20% on other parts?

A: The ±10% tolerance on SRR1260-271K provides tighter inductance control, beneficial for precision circuits. The ±20% tolerance on other parts is acceptable for general applications where inductance variation within this range does not affect circuit function.

Q: Can height differences affect PCB assembly?

A: Yes. The original part is 4.50mm maximum height. CDRH125/LDNP-271MC (6.00mm) and SRR1260-271K (6.50mm) are moderately taller. CDRR107NP-271MC (10.00mm) is significantly taller. Verify clearance above the component and reflow oven profile compatibility.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message