VLP6045LT-470M Equivalent & Substitute Parts

Part Overview

The VLP6045LT-470M is a 47 µH shielded drum core wirewound inductor manufactured by TDK Corporation, rated for 1.4 A with a maximum DC resistance of 299 mOhm. This component is classified as obsolete. Due to its discontinued status, identifying equivalent substitute parts with compatible electrical and mechanical specifications is essential for design continuity and procurement planning.

Key Parameters

Parameter	Value
Inductance	47 µH
Current Rating	1.4 A
DC Resistance (DCR)	299 mOhm Max
Tolerance	±20%
Core Material	Ferrite
Shielding	Shielded
Operating Temperature Range	-40°C ~ 105°C
Mounting Type	Surface Mount
Package Size	6.80mm x 6.80mm x 4.50mm (Max Height)
Inductance Test Frequency	100 kHz

Substitute Part Grouping Explanation

Substitute parts for the VLP6045LT-470M must satisfy the following criteria:

Inductance Value: Exactly 47 µH at 100 kHz test frequency
Tolerance: ±20% or tighter
Core Type: Ferrite drum core wirewound construction
Current Rating: Minimum 1.4 A (equal or greater)
DC Resistance: Maximum 299 mOhm (equal or lower preferred for thermal performance)
Shielding: Shielded or semi-shielded configuration acceptable
Operating Temperature: Minimum -40°C ~ 105°C range
Mounting: Surface mount, nonstandard package
Moisture Sensitivity: MSL 1 (Unlimited)

Two substitute parts meet these electrical and mechanical compatibility requirements:

VLS6045EX-470M (TDK Corporation) – Manufacturer recommended substitute with improved DC resistance
SRN6045-470M (Bourns Inc.) – Alternative source with semi-shielded configuration and extended temperature range

Parameter Comparison

Parameter	VLP6045LT-470M (Main)	VLS6045EX-470M (TDK)	SRN6045-470M (Bourns)
Manufacturer	TDK Corporation	TDK Corporation	Bourns Inc.
Inductance	47 µH	47 µH	47 µH
Tolerance	±20%	±20%	±20%
Current Rating (Amps)	1.4 A	1.3 A	1.1 A
Current - Saturation (Isat)	1.4 A	1.8 A	1.3 A
DC Resistance (DCR)	299 mOhm Max	230 mOhm	257 mOhm Max
Shielding	Shielded	Shielded	Semi-Shielded
Core Material	Ferrite	Ferrite	Ferrite
Operating Temperature	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package Size (L x W)	6.80mm x 6.80mm	6.00mm x 6.00mm	6.00mm x 6.00mm
Height - Seated (Max)	4.50mm	4.50mm	4.50mm
Product Status	Obsolete	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant
Inductance Test Frequency	100 kHz	100 kHz	100 kHz

Engineering Selection Recommendations

VLS6045EX-470M (TDK Corporation) is the manufacturer-recommended substitute. This part maintains TDK sourcing continuity, operates within the same temperature range, and provides superior DC resistance performance at 230 mOhm compared to the original 299 mOhm specification. The part is ROHS3 compliant and carries active product status with established supply availability. The 1.3 A current rating is marginally lower than the original 1.4 A specification; applications requiring the full 1.4 A rating should evaluate saturation current performance (1.8 A Isat) for margin analysis.

SRN6045-470M (Bourns Inc.) provides an alternative source from a different manufacturer. This part offers an extended operating temperature range to 125°C and improved DC resistance at 257 mOhm. The semi-shielded configuration may introduce different electromagnetic coupling characteristics compared to the fully shielded original design. The 1.1 A current rating represents a more significant reduction and should be evaluated against circuit requirements. This part is ROHS3 compliant with active product status.

Both substitutes maintain the 47 µH inductance value, ±20% tolerance, ferrite core construction, surface mount configuration, and MSL 1 moisture sensitivity rating. Package footprint differences (6.00mm vs. 6.80mm) require PCB layout verification.

Frequently Asked Questions (FAQ)

Q: Can VLS6045EX-470M directly replace VLP6045LT-470M in all applications?

A: VLS6045EX-470M meets the core electrical specifications (47 µH, ±20% tolerance, ferrite core, shielded configuration). The 1.3 A current rating is lower than the original 1.4 A; applications operating near the original current limit require saturation current analysis. The improved DC resistance (230 mOhm vs. 299 mOhm) provides thermal benefit. Package size reduction (6.00mm vs. 6.80mm) requires PCB layout verification.

Q: What are the key differences between the TDK and Bourns substitutes?

A: VLS6045EX-470M (TDK) maintains manufacturer continuity with identical temperature range and shielded configuration. SRN6045-470M (Bourns) offers extended temperature range to 125°C and semi-shielded design with lower DC resistance. The Bourns part has a lower current rating (1.1 A) and different shielding characteristics that may affect EMI performance in sensitive applications.

Q: Does the package size difference affect compatibility?

A: Both substitutes use 6.00mm x 6.00mm footprints compared to the original 6.80mm x 6.80mm. Height remains 4.50mm maximum. PCB layout and component placement spacing must be verified to confirm mechanical fit and thermal management adequacy.

Q: Are both substitutes RoHS compliant?

A: Yes. VLS6045EX-470M and SRN6045-470M are both ROHS3 compliant. The original VLP6045LT-470M RoHS status is not specified in available documentation.

Q: Which substitute should be selected for new designs?

A: Selection depends on application requirements. For thermal performance and manufacturer continuity, VLS6045EX-470M is preferred. For extended temperature operation and alternative sourcing, SRN6045-470M is suitable. Current rating requirements must be evaluated against circuit operating conditions in both cases.

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