477LBB350M2DF Equivalent & Substitute Parts

Part Overview

The 477LBB350M2DF is a 470 µF, 350 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor. This radial, snap-in can capacitor is rated for general-purpose applications with a specified lifetime of 3000 hours at 85°C. The product maintains active status in the market. Alternative models become necessary when application requirements exceed the base voltage specification or when superior thermal performance characteristics are required for extended operational lifespans.

Key Parameters

Parameter	Specification
Capacitance	470 µF
Tolerance	±20%
Voltage - Rated	350 V
ESR @ 120Hz	529.11 mOhm
Lifetime @ Temperature	3000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Lead Spacing	0.394" (10.00 mm)
Case Size	1.181" Dia (30.00 mm)
Height - Seated (Max)	1.654" (42.00 mm)
Package Type	Radial, Can - Snap-In
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the 477LBB350M2DF is based strictly on the following allowable parameters:

Fixed Parameters (Must Match):

Capacitance: 470 µF
Tolerance: ±20%
Package Type: Radial, Can - Snap-In
Lead Spacing: 0.394" (10.00 mm)
Case Size: 1.181" Dia (30.00 mm)
Height: 1.654" (42.00 mm)
Mounting Type: Through Hole
Polarization: Polar

Allowable Variation Parameters:

Voltage - Rated: Equal to or greater than 350 V
Operating Temperature: Equal to or exceeding -40°C ~ 85°C
Lifetime @ Temperature: Greater than 3000 hours at rated temperature
ESR: Lower or equal values acceptable

The two substitute parts listed—B43601B9477M000 and B43642B9477M000—both meet these substitution criteria through increased voltage ratings (400 V) while maintaining identical physical dimensions and capacitance specifications.

Parameter Comparison

Parameter	477LBB350M2DF	B43601B9477M000	B43642B9477M000
Manufacturer	Cornell Dubilier / Illinois Capacitor	EPCOS - TDK Electronics	EPCOS - TDK Electronics
Capacitance	470 µF	470 µF	470 µF
Tolerance	±20%	±20%	±20%
Voltage - Rated	350 V	400 V	400 V
ESR	529.11 mOhm @ 120Hz	230 mOhm @ 100Hz	210 mOhm @ 100Hz
Lifetime @ Temperature	3000 Hrs @ 85°C	10000 Hrs @ 85°C	3000 Hrs @ 105°C
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 105°C
Lead Spacing	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Case Size	1.181" Dia (30.00 mm)	1.181" Dia (30.00 mm)	1.181" Dia (30.00 mm)
Height - Seated (Max)	1.654" (42.00 mm)	1.654" (42.00 mm)	1.654" (42.00 mm)
Package Type	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

B43642B9477M000 (Primary Selection): This substitute provides full compatibility with the 477LBB350M2DF while delivering improved electrical performance. The part maintains active product status with ROHS3 compliance. The 400 V rating provides additional voltage margin over the original 350 V specification. Operating temperature range extends to 105°C, accommodating higher ambient conditions. ESR is reduced to 210 mOhm at 100Hz, improving ripple current handling characteristics.

B43601B9477M000 (Secondary Selection): This substitute offers a 400 V voltage rating with significantly extended lifetime characteristics (10000 hours at 85°C versus 3000 hours for the original part). ESR of 230 mOhm at 100Hz provides improved performance. However, this part carries "Not For New Designs" product status; selection of this part is appropriate only when inventory availability of the primary substitute is constrained or when the extended lifetime specification is specifically required.

Frequently Asked Questions (FAQ)

Q: Are these substitute parts physically compatible with the original 477LBB350M2DF? A: Yes. Both substitute parts maintain identical case diameter (1.181" / 30.00 mm), height (1.654" / 42.00 mm), and lead spacing (0.394" / 10.00 mm). Direct board-level substitution is supported without redesign.

Q: Can the substitute parts operate at lower voltages than their 400 V rating? A: Yes. Both B43601B9477M000 and B43642B9477M000 are rated for 400 V operation and are suitable for circuits designed for the original 350 V part, as the rating represents maximum allowable voltage.

Q: Which substitute should be selected for new circuit designs? A: B43642B9477M000 is the appropriate selection for new designs. This part maintains active product status and satisfies all original specifications while providing improved thermal performance and reduced ESR.

Q: What is the significance of the ESR differences between these parts? A: Equivalent Series Resistance directly affects ripple current handling capability and heat generation. The reduced ESR values (230-210 mOhm) of the substitute parts compared to the original (529.11 mOhm) indicate improved electrical efficiency and lower operating temperatures under ripple current stress.

Q: Are all parts listed ROHS3 compliant? A: Yes. The main part and both substitute parts conform to ROHS3 compliance requirements.

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