VLP8040T-100M Equivalent & Substitute Parts

Part Overview

The VLP8040T-100M is a 10 µH shielded drum core, wirewound inductor manufactured by TDK Corporation, rated for 3.2 A with a maximum DC resistance of 38 mOhm. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The part operates across a temperature range of -40°C to 105°C and is suitable for surface mount applications in nonstandard package configurations.

Key Parameters

Parameter	Value
Inductance	10 µH
Inductance Tolerance	±20%
Current Rating	3.2 A
Current - Saturation (Isat)	3.2 A
DC Resistance (DCR)	38 mOhm Max
Core Material	Ferrite
Shielding	Shielded
Operating Temperature	-40°C ~ 105°C
Mounting Type	Surface Mount
Inductance Test Frequency	100 kHz
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the VLP8040T-100M is determined by the following critical parameters:

Inductance value of 10 µH with ±20% tolerance
Current rating capability of 3.2 A minimum
Ferrite core material construction
Shielded or semi-shielded configuration
Surface mount, nonstandard package format
Operating temperature range of -40°C to 105°C
DC resistance characteristics compatible with circuit requirements

The three substitute parts listed below meet these core electrical and mechanical criteria while offering improved availability or enhanced performance characteristics.

Parameter Comparison

Parameter	VLP8040T-100M	VLS6045EX-100M	CDRH80D38DNP-100MC	SRN8040-100M
Manufacturer	TDK Corporation	TDK Corporation	Sumida America Components Inc.	Bourns Inc.
Inductance	10 µH	10 µH	10 µH	10 µH
Inductance Tolerance	±20%	±20%	±20%	±20%
Current Rating (Amps)	3.2 A	3.4 A	4.6 A	3.1 A
Current - Saturation (Isat)	3.2 A	3.9 A	3.65 A	3.4 A
DC Resistance (DCR)	38 mOhm Max	47 mOhm	35 mOhm	50 mOhm Max
Core Material	Ferrite	Ferrite	Ferrite	Ferrite
Shielding	Shielded	Shielded	Shielded	Semi-Shielded
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Inductance Test Frequency	100 kHz	100 kHz	100 kHz	100 kHz
Product Status	Obsolete	Active	Active	Active
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Not specified	1 (Unlimited)

Engineering Selection Recommendations

All three substitute parts are classified as active products with current manufacturing support, addressing the obsolescence status of the VLP8040T-100M.

VLS6045EX-100M (TDK Corporation) is the manufacturer-recommended primary substitute. It maintains TDK manufacturing continuity and offers improved current saturation performance at 3.9 A. The part is RoHS3 compliant and available in high volume inventory. The reduced physical footprint (6.00mm x 6.00mm versus 8.00mm x 7.70mm) may require PCB layout verification.

CDRH80D38DNP-100MC (Sumida America Components Inc.) provides the lowest DC resistance at 35 mOhm, delivering superior thermal performance in power-sensitive applications. The part maintains comparable physical dimensions to the original component and supports the full operating temperature range.

SRN8040-100M (Bourns Inc.) extends the operating temperature range to 125°C and provides documented Q factor and self-resonant frequency specifications. The semi-shielded configuration may introduce different EMI characteristics compared to the fully shielded original design. RoHS3 compliance is confirmed.

Frequently Asked Questions (FAQ)

Q: Can VLS6045EX-100M be used as a direct replacement for VLP8040T-100M?

A: VLS6045EX-100M meets all electrical substitution criteria with equivalent inductance, tolerance, and current rating. The primary consideration is the reduced package size (6.00mm x 6.00mm versus 8.00mm x 7.70mm), which requires PCB layout verification to confirm component placement compatibility.

Q: What is the difference between shielded and semi-shielded configurations?

A: Shielded inductors (VLP8040T-100M, VLS6045EX-100M, CDRH80D38DNP-100MC) provide enhanced electromagnetic field containment. The SRN8040-100M semi-shielded design offers reduced shielding, which may result in different coupling characteristics in multi-inductor circuit layouts.

Q: Are all substitute parts RoHS compliant?

A: VLS6045EX-100M and SRN8040-100M are confirmed RoHS3 compliant. CDRH80D38DNP-100MC compliance status is not specified in the provided data.

Q: Which substitute offers the best thermal performance?

A: CDRH80D38DNP-100MC provides the lowest DC resistance at 35 mOhm, resulting in reduced resistive heating under rated current conditions.

Q: Can SRN8040-100M be used in applications requiring the -40°C to 105°C temperature range?

A: Yes. SRN8040-100M supports -40°C to 125°C, which encompasses the original operating range and provides additional margin for extended temperature applications.

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