MSS7341T-273MLD Equivalent & Substitute Parts

Part Overview

The MSS7341T-273MLD is a 27 µH shielded drum core inductor manufactured by Coilcraft, rated for 2.1 A continuous current with 109mOhm DC resistance. This component is designed for surface mount applications requiring ferrite core shielding and operates across the industrial temperature range of -40°C to 125°C. The part maintains Active product status and carries AEC-Q200 automotive qualification.

Substitute parts are identified when equivalent inductance values, shielding characteristics, and operating temperature ranges align within the specified tolerance parameters, enabling direct replacement in circuit designs where current rating and DC resistance variations fall within acceptable design margins.

Key Parameters

Parameter	MSS7341T-273MLD
Inductance	27 µH ±20%
Current Rating	2.1 A
DC Resistance (DCR)	109mOhm
Core Material	Ferrite
Shielding	Shielded
Operating Temperature	-40°C ~ 125°C
Mounting Type	Surface Mount
Package Dimensions	7.30mm x 7.30mm x 4.10mm (Max)
Compliance	AEC-Q200, ROHS3

Substitute Part Grouping Explanation

Substitution eligibility for the MSS7341T-273MLD is determined by the following criteria:

Inductance value of 27 µH within ±20% tolerance
Ferrite core material with shielding
Surface mount configuration
Package footprint compatibility (7.30mm x 7.30mm)
Operating temperature range of -40°C to 125°C minimum
AEC-Q200 qualification
ROHS3 compliance

The SRR0745A-270M meets these core substitution parameters. Variations in current rating (1.45 A vs. 2.1 A) and DC resistance (130mOhm Max vs. 109mOhm) represent measurable differences that must be evaluated against specific circuit requirements.

Parameter Comparison

Parameter	MSS7341T-273MLD	SRR0745A-270M	Variance
Manufacturer	Coilcraft	Bourns Inc.	Different
Inductance	27 µH ±20%	27 µH ±20%	Equivalent
Current Rating	2.1 A	1.45 A	-31% (Lower)
DC Resistance	109mOhm	130mOhm Max	+19% (Higher)
Core Material	Ferrite	Ferrite	Equivalent
Shielding	Shielded	Shielded	Equivalent
Operating Temperature	-40°C ~ 125°C	-40°C ~ 125°C	Equivalent
Package Dimensions	7.30mm x 7.30mm x 4.10mm	7.30mm x 7.30mm x 4.70mm	Height +0.60mm
Mounting Type	Surface Mount	Surface Mount	Equivalent
Compliance	AEC-Q200, ROHS3	AEC-Q200, ROHS3	Equivalent

Engineering Selection Recommendations

Both the MSS7341T-273MLD and SRR0745A-270M maintain Active product status with AEC-Q200 automotive qualification and ROHS3 compliance, establishing baseline compatibility for regulated applications.

Selection between these parts requires circuit-level evaluation of current handling capacity. The MSS7341T-273MLD supports 2.1 A continuous current, while the SRR0745A-270M is rated for 1.45 A. Applications operating above 1.45 A require the Coilcraft part. Designs operating below 1.45 A may use either part.

DC resistance differences (109mOhm vs. 130mOhm) produce measurable power dissipation variations. At 1.45 A, the Coilcraft part dissipates 0.229 W while the Bourns part dissipates 0.274 W. Thermal design margins must accommodate this 0.045 W increase when substituting to the SRR0745A-270M.

Height clearance differs by 0.60mm (4.10mm vs. 4.70mm). PCB layout and component stacking must verify accommodation of the taller Bourns package.

Frequently Asked Questions (FAQ)

Q: Can SRR0745A-270M directly replace MSS7341T-273MLD in all applications?

A: Direct replacement is valid only when circuit current requirements do not exceed 1.45 A and thermal design accommodates the higher DC resistance. Height clearance of 4.70mm must be verified against PCB layout constraints.

Q: What is the inductance tolerance for both parts?

A: Both parts specify ±20% inductance tolerance at their respective test frequencies (100 kHz for Coilcraft, 1 kHz for Bourns). This tolerance band encompasses both nominal values within acceptable circuit performance margins.

Q: Are there differences in shielding effectiveness between these parts?

A: Both parts employ ferrite core shielding. Specific shielding performance data is not provided in the component specifications. Circuit-level EMI testing is required if shielding performance is a critical design parameter.

Q: What is the saturation current difference between these inductors?

A: The MSS7341T-273MLD specifies 1 A saturation current, while the SRR0745A-270M specifies 1.62 A saturation current. The Bourns part exhibits higher saturation margin relative to its 1.45 A continuous rating.

Q: Can these parts be used interchangeably in tape and reel packaging?

A: The SRR0745A-270M is supplied in Tape & Reel packaging. The MSS7341T-273MLD packaging format is not specified in the provided data. Verify packaging availability with component suppliers for production volume requirements.

Q: Do both parts meet automotive qualification standards?

A: Both parts carry AEC-Q200 qualification and ROHS3 compliance, meeting automotive industry reliability and environmental standards.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message