477CKS050M Equivalent & Substitute Parts

Part Overview

The 477CKS050M is a 470 µF, 50 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier / Illinois Capacitor. This component is designed for bypass and decoupling applications with a rated lifetime of 2000 hours at 85°C. The part is classified as obsolete, necessitating identification of equivalent and substitute components for ongoing design requirements and production continuity.

Key Parameters

Parameter	477CKS050M
Capacitance	470 µF
Voltage Rating	50 V
Tolerance	±20%
Package Type	Radial, Can
Mounting Type	Through Hole
Lead Spacing	0.197" (5.00mm)
Case Diameter	0.394" (10.00mm)
Operating Temperature Range	-40°C ~ 85°C
Lifetime @ Temperature	2000 Hrs @ 85°C
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution of the 477CKS050M is determined by the following critical parameters:

Electrical Parameters:

Capacitance: 470 µF (exact match required)
Voltage Rating: 50 V (exact match required)
Tolerance: ±20% (exact match required)

Mechanical Parameters:

Package Type: Radial, Can (exact match required)
Lead Spacing: 0.197" (5.00mm) (exact match required)
Case Diameter: 0.394" (10.00mm) (exact match required)
Mounting Type: Through Hole (exact match required)

Environmental & Compliance Parameters:

Operating Temperature Range: -40°C ~ 85°C minimum (equal or extended range acceptable)
Lifetime @ Temperature: 2000 Hrs @ 85°C minimum (equal or extended acceptable)
RoHS Status: ROHS3 Compliant (required)

All substitute parts listed meet these core requirements. Variations in ESR, ripple current ratings, and maximum height (within 0.02" tolerance) are acceptable provided all critical parameters align.

Parameter Comparison

Part Number	Manufacturer	Capacitance	Voltage	Tolerance	Case Dia	Height (Max)	Lead Spacing	Operating Temp	Lifetime @ Temp	Product Status	RoHS
477CKS050M	Cornell Dubilier / Illinois Capacitor	470 µF	50 V	±20%	0.394" (10.00mm)	0.846" (21.50mm)	0.197" (5.00mm)	-40°C ~ 85°C	2000 Hrs @ 85°C	Obsolete	ROHS3
477CKE050M	Cornell Dubilier / Illinois Capacitor	470 µF	50 V	±20%	0.394" (10.00mm)	0.846" (21.50mm)	0.197" (5.00mm)	-40°C ~ 105°C	2000 Hrs @ 105°C	Active	ROHS3
50PK470MEFC10X20	Rubycon	470 µF	50 V	±20%	0.394" (10.00mm)	0.866" (22.00mm)	0.197" (5.00mm)	-40°C ~ 85°C	2000 Hrs @ 85°C	Active	ROHS3
B41821A6477M000	EPCOS - TDK Electronics	470 µF	50 V	±20%	0.394" (10.00mm)	0.866" (22.00mm)	0.197" (5.00mm)	-40°C ~ 85°C	2000 Hrs @ 85°C	Active	ROHS3
ECA-1HM471	Panasonic Electronic Components	470 µF	50 V	±20%	0.394" (10.00mm)	0.866" (22.00mm)	0.197" (5.00mm)	-40°C ~ 85°C	2000 Hrs @ 85°C	Active	ROHS3
ESMG500ELL471MJ20S	Chemi-Con	470 µF	50 V	±20%	0.394" (10.00mm)	0.846" (21.50mm)	0.197" (5.00mm)	-40°C ~ 85°C	2000 Hrs @ 85°C	Active	ROHS3
ESMQ500ELL471MJ20S	Chemi-Con	470 µF	50 V	±20%	0.394" (10.00mm)	0.846" (21.50mm)	0.197" (5.00mm)	-40°C ~ 85°C	2000 Hrs @ 85°C	Active	ROHS3
UVK1H471MPD	Nichicon	470 µF	50 V	±20%	0.394" (10.00mm)	0.866" (22.00mm)	0.197" (5.00mm)	-40°C ~ 85°C	2000 Hrs @ 85°C	Not For New Designs	ROHS3
50PX470MEFC10X20	Rubycon	470 µF	50 V	±20%	0.394" (10.00mm)	0.866" (22.00mm)	0.197" (5.00mm)	-55°C ~ 105°C	2000 Hrs @ 105°C	Active	ROHS3
50PX470MEFCCA10X20	Rubycon	470 µF	50 V	±20%	0.394" (10.00mm)	0.846" (21.50mm)	0.197" (5.00mm)	-55°C ~ 105°C	2000 Hrs @ 105°C	Active	ROHS3
ECA-1HHG471	Panasonic Electronic Components	470 µF	50 V	±20%	0.394" (10.00mm)	0.866" (22.00mm)	0.197" (5.00mm)	-55°C ~ 105°C	2000 Hrs @ 105°C	Active	ROHS3

Engineering Selection Recommendations

Direct Replacement (Same Specifications):

The 477CKE050M from Cornell Dubilier / Illinois Capacitor serves as the direct upgrade path from the obsolete 477CKS050M. Both components share identical electrical and mechanical specifications with the exception of extended operating temperature range (-40°C ~ 105°C versus -40°C ~ 85°C) and improved lifetime rating at elevated temperature (2000 Hrs @ 105°C versus 2000 Hrs @ 85°C). The 477CKE050M is active in production and ROHS3 compliant.

Active Substitutes (Equivalent Performance):

The following components are active in production and meet all critical substitution parameters:

50PK470MEFC10X20 (Rubycon): Direct electrical and mechanical equivalent with identical operating temperature range and lifetime specifications.
B41821A6477M000 (EPCOS - TDK Electronics): Direct equivalent with active product status and full compliance certifications.
ECA-1HM471 (Panasonic Electronic Components): Direct equivalent with active product status.
ESMG500ELL471MJ20S (Chemi-Con): Direct equivalent with active product status and matching case height.
ESMQ500ELL471MJ20S (Chemi-Con): Direct equivalent with active product status and matching case height.

Enhanced Substitutes (Extended Operating Range):

The following components provide extended operating temperature range and improved lifetime ratings at elevated temperature:

50PX470MEFC10X20 (Rubycon): Extended operating range (-55°C ~ 105°C) and lifetime rating (2000 Hrs @ 105°C).
50PX470MEFCCA10X20 (Rubycon): Extended operating range (-55°C ~ 105°C) and lifetime rating (2000 Hrs @ 105°C) with matching case height to original part.
ECA-1HHG471 (Panasonic Electronic Components): Extended operating range (-55°C ~ 105°C) and lifetime rating (2000 Hrs @ 105°C).

Restricted Substitutes:

UVK1H471MPD (Nichicon): Meets all electrical and mechanical requirements but carries "Not For New Designs" product status. Suitable for legacy system maintenance only.

All substitute parts are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts as a direct replacement for the 477CKS050M?

A: All listed substitute parts meet the core electrical and mechanical requirements: 470 µF capacitance, 50 V voltage rating, ±20% tolerance, radial can package, 0.197" lead spacing, and 0.394" case diameter. Physical height variations of up to 0.02" are acceptable in most through-hole applications. Verify PCB layout clearance before final selection.

Q: What is the difference between the 477CKE050M and the original 477CKS050M?

A: The 477CKE050M is the active production equivalent. Both share identical electrical and mechanical specifications. The 477CKE050M offers extended operating temperature range (-40°C ~ 105°C versus -40°C ~ 85°C) and improved lifetime at elevated temperature (2000 Hrs @ 105°C versus 2000 Hrs @ 85°C). The 477CKE050M is recommended for new designs and production continuity.

Q: Why do some substitute parts have different maximum heights?

A: The original 477CKS050M has a maximum seated height of 0.846" (21.50mm). Some substitutes measure 0.866" (22.00mm). This 0.02" difference is within standard manufacturing tolerance for aluminum electrolytic capacitors and does not affect electrical performance. Verify PCB clearance for height-sensitive applications.

Q: What does "Not For New Designs" mean for the UVK1H471MPD?

A: This designation indicates the part is available for existing inventory and legacy system support but is not recommended for new product development. The UVK1H471MPD meets all technical requirements but should be used only for maintenance and repair of existing systems using this component.

Q: Are the enhanced substitutes with extended temperature range compatible with my existing design?

A: Yes. The 50PX470MEFC10X20, 50PX470MEFCCA10X20, and ECA-1HHG471 provide extended operating range (-55°C ~ 105°C) and improved lifetime ratings. These components are fully backward compatible with designs specified for -40°C ~ 85°C operation. They offer improved performance margin in thermal stress conditions.

Q: How do I verify physical compatibility before ordering?

A: Confirm the following dimensions match your PCB layout: lead spacing (0.197" / 5.00mm), case diameter (0.394" / 10.00mm), and maximum seated height (0.846" to 0.866" acceptable). All listed substitutes use through-hole radial can packaging with identical lead spacing and diameter.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification and are REACH unaffected, meeting current regulatory requirements for electronic component manufacturing and use.

Q: What is the difference between Rubycon PK and PX series?

A: The 50PK470MEFC10X20 (PK series) provides standard specifications matching the original part (2000 Hrs @ 85°C, -40°C ~ 85°C). The 50PX470MEFC10X20 and 50PX470MEFCCA10X20 (PX series) offer enhanced performance with extended temperature range (-55°C ~ 105°C) and improved lifetime at elevated temperature (2000 Hrs @ 105°C). Both are active in production.

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