ELL-CTV270M Equivalent & Substitute Parts

Part Overview

The ELL-CTV270M is a 27 µH shielded drum core, wirewound inductor manufactured by Panasonic Electronic Components. This surface mount component is rated for 2.3 A continuous current with a DC resistance of 43 mOhm and operates at 100 kHz test frequency. The part carries an obsolete product status, making equivalent substitutes necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Inductance	27 µH
Tolerance	±20%
Current Rating	2.3 A
DC Resistance (DCR)	43 mOhm
Shielding	Shielded
Core Material	Ferrite
Mounting Type	Surface Mount
Package Size	12.00mm x 12.00mm
Test Frequency	100 kHz
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the ELL-CTV270M is determined by strict alignment of the following electrical and mechanical parameters:

Critical Matching Parameters:

Inductance value: 27 µH (fixed requirement)
Inductance tolerance: ±20% (fixed requirement)
Core material: Ferrite shielded construction
Mounting type: Surface mount
Test frequency: 100 kHz
RoHS3 compliance

Allowable Variation Parameters:

Current rating: Substitute must equal or exceed 2.3 A
DC resistance: Substitute must not exceed 43 mOhm significantly (lower values preferred for thermal performance)
Package dimensions: Minor variations acceptable within standard SMD envelope constraints
Operating temperature range: Substitute must support minimum operating conditions

Two qualified substitutes meet these criteria: the CDRH125/LDNP-270MC from Sumida America Components Inc. and the SRR1260-270M from Bourns Inc.

Parameter Comparison

Parameter	ELL-CTV270M (Panasonic)	CDRH125/LDNP-270MC (Sumida)	SRR1260-270M (Bourns)
Inductance	27 µH	27 µH	27 µH
Tolerance	±20%	±20%	±20%
Current Rating (Amps)	2.3 A	3 A	3.6 A
DC Resistance (DCR)	43 mOhm	52 mOhm Max	45 mOhm Max
Shielding	Shielded	Shielded	Shielded
Core Material	Ferrite	Ferrite	Ferrite
Type	Drum Core, Wirewound	Not specified	Drum Core, Wirewound
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package Size (L x W)	12.00mm x 12.00mm	12.00mm x 12.00mm	12.50mm x 12.50mm
Height - Seated (Max)	4.50mm	6.00mm	6.50mm
Operating Temperature	Not specified	-40°C ~ 100°C	-40°C ~ 125°C
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Both substitute parts are active products with ROHS3 compliance, providing long-term procurement viability compared to the obsolete ELL-CTV270M.

CDRH125/LDNP-270MC (Sumida America Components Inc.):

Maintains identical package footprint (12.00mm x 12.00mm)
Provides 3 A current rating, exceeding the original 2.3 A requirement
DC resistance of 52 mOhm is within acceptable tolerance for this inductor class
Operating temperature range of -40°C to 100°C covers standard industrial applications
Tape & Reel packaging supports automated assembly

SRR1260-270M (Bourns Inc.):

Highest current rating at 3.6 A with saturation current of 3.3 A
Lowest DC resistance at 45 mOhm Max, providing superior thermal performance
Extended operating temperature range of -40°C to 125°C for demanding environments
Documented Q factor (26 @ 2.52MHz) and self-resonant frequency (12.7MHz) for RF applications
Slightly larger footprint (12.50mm x 12.50mm) requires PCB layout verification
Drum core, wirewound construction matches original design topology

Selection between these substitutes depends on specific application constraints: footprint criticality, thermal requirements, and operating temperature range.

Frequently Asked Questions (FAQ)

Q: Can the CDRH125/LDNP-270MC be used as a direct replacement for the ELL-CTV270M?

A: Yes, with PCB layout verification. Both parts share identical inductance (27 µH), tolerance (±20%), and footprint dimensions (12.00mm x 12.00mm). The CDRH125/LDNP-270MC provides higher current rating (3 A vs. 2.3 A) and active product status. Height difference (6.00mm vs. 4.50mm) must be confirmed against PCB clearance requirements.

Q: What are the key differences between the two substitute options?

A: The SRR1260-270M offers superior electrical performance with 3.6 A current rating, lower DC resistance (45 mOhm), and extended temperature range (-40°C to 125°C). The CDRH125/LDNP-270MC maintains the original footprint dimensions and provides adequate performance for standard applications. The SRR1260-270M requires slightly larger PCB space (12.50mm x 12.50mm).

Q: Are both substitutes RoHS compliant?

A: Yes. Both the CDRH125/LDNP-270MC and SRR1260-270M are ROHS3 compliant, meeting environmental and regulatory requirements equivalent to the original ELL-CTV270M.

Q: Does DC resistance difference affect circuit performance?

A: The ELL-CTV270M specifies 43 mOhm. The CDRH125/LDNP-270MC is rated at 52 mOhm Max, and the SRR1260-270M at 45 mOhm Max. These variations fall within acceptable tolerance for inductor applications in this class. Higher DC resistance increases power dissipation; verify thermal budget if operating near maximum current ratings.

Q: Which substitute is better for high-temperature applications?

A: The SRR1260-270M supports -40°C to 125°C operating range, compared to the CDRH125/LDNP-270MC at -40°C to 100°C. For applications requiring extended temperature performance, the SRR1260-270M is the appropriate selection.

Q: Can I use either substitute without PCB redesign?

A: The CDRH125/LDNP-270MC requires no PCB footprint changes. The SRR1260-270M has a slightly larger footprint (12.50mm x 12.50mm vs. 12.00mm x 12.00mm) and greater height (6.50mm vs. 4.50mm), requiring PCB layout verification for clearance and component spacing.

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