SDE6603-4R7M Equivalent & Substitute Parts

Part Overview

The SDE6603-4R7M is a 4.7 µH unshielded drum core wirewound inductor manufactured by Bourns Inc., rated for 1.5 A with a maximum DC resistance of 90 mOhm. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity. The part operates across a temperature range of -25°C to 105°C and is ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level).

Key Parameters

Parameter	Value
Inductance	4.7 µH
Inductance Tolerance	±20%
Current Rating	1.5 A
Current - Saturation (Isat)	1.5 A
DC Resistance (DCR)	90 mOhm Max
Shielding	Unshielded
Frequency - Self Resonant	50 MHz
Operating Temperature Range	-25°C to 105°C
Mounting Type	Surface Mount
Physical Dimensions	0.260" L x 0.175" W x 0.115" H (6.60mm x 4.45mm x 2.92mm)
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the SDE6603-4R7M are qualified based on strict electrical and mechanical parameter matching:

Critical Matching Parameters:

Inductance value: 4.7 µH
Inductance tolerance: ±20%
Current rating: 1.5 A
Current saturation: 1.5 A
DC resistance: 90 mOhm maximum
Shielding configuration: Unshielded
Physical dimensions: 0.260" L x 0.175" W x 0.115" H
Mounting type: Surface Mount
Inductance test frequency: 100 kHz

All substitute parts listed meet these core electrical specifications and physical constraints. Variations in operating temperature range, self-resonant frequency, and product status (active vs. obsolete) are noted but do not disqualify substitution when electrical parameters align.

Parameter Comparison

Parameter	SDE6603-4R7M (Main)	SDR6603-4R7M	P0770.472NLT	74455047	P0770.472NL	UP0.4UC-4R7-R
Manufacturer	Bourns Inc.	Bourns Inc.	Pulse Electronics	Würth Elektronik	Pulse Electronics	Eaton - Electronics Division
Product Status	Obsolete	Active	Active	Active	Active	Active
Inductance	4.7 µH	4.7 µH	4.7 µH	4.7 µH	4.7 µH	4.7 µH
Inductance Tolerance	±20%	±20%	±20%	±20%	±20%	±20%
Current Rating (Amps)	1.5 A	1.5 A	1.5 A	1.5 A	1.5 A	1.5 A
Current - Saturation (Isat)	1.5 A	1.5 A	1.5 A	1.5 A	1.5 A	1.5 A
DC Resistance (DCR)	90 mOhm Max	90 mOhm Max	90 mOhm Max	90 mOhm Max	90 mOhm Max	90 mOhm Max
Shielding	Unshielded	Unshielded	Unshielded	Unshielded	Unshielded	Unshielded
Frequency - Self Resonant	50 MHz	50 MHz	—	37 MHz	—	50 MHz
Operating Temperature Range	-25°C to 105°C	-40°C to 125°C	-40°C to 130°C	-40°C to 100°C	-40°C to 130°C	-25°C to 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Physical Dimensions	0.260" L x 0.175" W x 0.115" H	0.260" L x 0.175" W x 0.115" H	0.260" L x 0.175" W x 0.115" H	0.260" L x 0.175" W x 0.115" H	0.260" L x 0.175" W x 0.115" H	0.260" L x 0.175" W x 0.115" H
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All listed substitute parts meet the core electrical and mechanical specifications of the SDE6603-4R7M. Selection among active alternatives should be based on the following factors:

SDR6603-4R7M (Bourns Inc.): Direct Bourns equivalent with active product status. Offers extended operating temperature range (-40°C to 125°C) compared to the original part. ROHS3 compliant. Recommended for designs requiring continuity with Bourns component ecosystem.

P0770.472NLT (Pulse Electronics): Active Pulse Electronics alternative with extended upper temperature limit (-40°C to 130°C). Tape & Reel packaging available. ROHS3 compliant. Suitable for applications requiring higher temperature margin.

74455047 (Würth Elektronik): Active WE-PD4 series inductor with lower self-resonant frequency (37 MHz vs. 50 MHz). Operating temperature range -40°C to 100°C. ROHS3 compliant. Consider for applications where lower resonant frequency is acceptable.

P0770.472NL (Pulse Electronics): Active Pulse Electronics variant with extended temperature range (-40°C to 130°C). ROHS3 compliant. Available in limited packaging options.

UP0.4UC-4R7-R (Eaton - Electronics Division): Active UNI-PAC™ 0.4UC series inductor. Operating temperature range -25°C to 85°C (narrower than alternatives). RoHS compliant. Suitable for applications within specified temperature constraints.

Frequently Asked Questions (FAQ)

Q: Can the SDE6603-4R7M be directly replaced with any of these substitute parts?

A: Yes. All listed substitute parts match the critical electrical parameters (4.7 µH inductance, 1.5 A rating, 90 mOhm DCR) and physical dimensions (0.260" x 0.175" x 0.115"). Direct PCB footprint compatibility is maintained across all alternatives.

Q: What is the primary reason for finding substitutes for the SDE6603-4R7M?

A: The SDE6603-4R7M is classified as obsolete. Active substitute parts ensure design continuity and long-term procurement availability.

Q: Are there differences in operating temperature ranges among the substitutes?

A: Yes. The original SDE6603-4R7M operates from -25°C to 105°C. Substitutes range from -25°C to 85°C (UP0.4UC-4R7-R) to -40°C to 130°C (P0770.472NLT and P0770.472NL). Select based on application temperature requirements.

Q: Do all substitutes have the same self-resonant frequency?

A: No. The 74455047 has a self-resonant frequency of 37 MHz, while the SDE6603-4R7M, SDR6603-4R7M, and UP0.4UC-4R7-R are rated at 50 MHz. The P0770.472NLT and P0770.472NL do not specify this parameter. For frequency-sensitive applications, confirm compatibility with your circuit design.

Q: Are all substitutes RoHS compliant?

A: Yes. All listed parts are RoHS compliant (ROHS3 or RoHS). All carry MSL 1 (unlimited) moisture sensitivity ratings.

Q: What packaging options are available?

A: The SDE6603-4R7M does not specify packaging. SDR6603-4R7M, P0770.472NLT, 74455047, and UP0.4UC-4R7-R are available in Tape & Reel (TR) packaging. P0770.472NL packaging is not specified.

Q: Which substitute offers the best temperature margin?

A: P0770.472NLT and P0770.472NL offer the widest operating range (-40°C to 130°C), providing the greatest temperature margin for demanding applications.

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