476SAK250M Equivalent & Substitute Parts Reference

Part Overview

The 476SAK250M is a 47 µF, 25 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor in the SAK series. This radial, through-hole component is designed for general-purpose applications requiring stable capacitance and low equivalent series resistance. The part is currently active in production with 1128 units in stock. Substitute parts are identified when circuit designs require higher voltage ratings, extended operational lifetimes, or alternative manufacturer sourcing while maintaining core electrical and mechanical compatibility.

Key Parameters

Parameter	476SAK250M
Capacitance	47 µF
Tolerance	±20%
Voltage - Rated	25 V
ESR @ 120 Hz	7.055 Ω
Lifetime @ Temperature	2000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Ripple Current @ 120 Hz	420 mA
Lead Spacing	0.295" (7.50 mm)
Case Diameter	0.709" (18.00 mm)
Height - Seated (Max)	0.846" (21.50 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can
Polarization	Polar
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitution of the 476SAK250M is determined by strict adherence to the following electrical and mechanical parameters:

Critical Compatibility Parameters:

Capacitance: 47 µF (exact match required)
Tolerance: ±20% (exact match required)
Lead Spacing: 0.295" (7.50 mm) (exact match required)
Case Diameter: 0.709" (18.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Package / Case: Radial, Can (exact match required)
Polarization: Polar (exact match required)

Parameters Permitting Variation:

Voltage - Rated: Substitute parts may exceed the original 25 V rating, provided the circuit design accommodates higher voltage components
Operating Temperature Range: Substitute parts may extend the upper temperature limit beyond 85°C
Lifetime @ Temperature: Substitute parts may provide extended operational lifetime ratings
Ripple Current: Substitute parts may provide equal or higher ripple current capacity
ESR: Substitute parts may provide equal or lower ESR values

All identified substitute parts maintain identical capacitance, tolerance, lead spacing, case diameter, and mounting configuration as the 476SAK250M.

Parameter Comparison

Parameter	476SAK250M (Cornell Dubilier)	450BXW47MEFR18X20 (Rubycon)	UCS2G470MHD6 (Nichicon)	UCY2G470MHD3 (Nichicon)
Capacitance	47 µF	47 µF	47 µF	47 µF
Tolerance	±20%	±20%	±20%	±20%
Voltage - Rated	25 V	450 V	400 V	400 V
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 105°C	-40°C ~ 105°C
Lifetime @ Temperature	2000 Hrs @ 85°C	10000 Hrs @ 105°C	10000 Hrs @ 105°C	12000 Hrs @ 105°C
Ripple Current @ 120 Hz	420 mA	460 mA	590 mA	590 mA
Lead Spacing	0.295" (7.50 mm)	0.295" (7.50 mm)	0.295" (7.50 mm)	0.295" (7.50 mm)
Case Diameter	0.709" (18.00 mm)	0.709" (18.00 mm)	0.709" (18.00 mm)	0.709" (18.00 mm)
Height - Seated (Max)	0.846" (21.50 mm)	0.866" (22.00 mm)	0.846" (21.50 mm)	0.846" (21.50 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Polarization	Polar	Polar	Polar	Polar
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

All identified substitute parts maintain active product status and ROHS3 compliance, ensuring continued availability and regulatory conformance.

450BXW47MEFR18X20 (Rubycon BXW Series): This substitute provides a 450 V rated voltage with 10000 hours operational lifetime at 105°C. The height dimension increases to 0.866" (22.00 mm), requiring verification of available board space. This part is suitable for applications requiring significantly higher voltage margins or extended thermal operation.

UCS2G470MHD6 (Nichicon UCS Series): This substitute provides a 400 V rated voltage with 10000 hours operational lifetime at 105°C. The height dimension matches the original part at 0.846" (21.50 mm). This part is suitable for applications requiring moderate voltage elevation and extended thermal operation.

UCY2G470MHD3 (Nichicon UCY Series): This substitute provides a 400 V rated voltage with 12000 hours operational lifetime at 105°C. The height dimension matches the original part at 0.846" (21.50 mm). REACH status is listed as affected. This part is suitable for applications requiring moderate voltage elevation and maximum extended thermal operation within the specified parameter set.

Frequently Asked Questions (FAQ)

Q: Can the 450BXW47MEFR18X20 be used in place of the 476SAK250M without circuit modification?

A: The 450BXW47MEFR18X20 maintains identical capacitance, tolerance, lead spacing, case diameter, and mounting configuration. The increased height dimension (0.866" versus 0.846") requires verification of available vertical clearance on the circuit board. The elevated voltage rating (450 V versus 25 V) is compatible with circuits designed for the original 25 V component.

Q: What is the primary difference between the UCS2G470MHD6 and UCY2G470MHD3?

A: Both parts share identical electrical ratings (47 µF, ±20%, 400 V) and mechanical dimensions. The UCY2G470MHD3 provides extended operational lifetime (12000 hours at 105°C versus 10000 hours at 105°C). The UCY2G470MHD3 carries REACH affected status, while the UCS2G470MHD6 carries REACH unaffected status.

Q: Are all substitute parts suitable for the same circuit applications as the 476SAK250M?

A: All substitute parts maintain the same capacitance value (47 µF) and tolerance (±20%), ensuring equivalent capacitive performance. The elevated voltage ratings of substitute parts do not restrict their use in circuits originally designed for 25 V operation. Circuit designers must confirm that available board space accommodates the 450BXW47MEFR18X20 height dimension (0.866" maximum).

Q: What inventory levels are available for each part?

A: 476SAK250M: 1128 units; 450BXW47MEFR18X20: 117398 units; UCS2G470MHD6: 1145 units; UCY2G470MHD3: 1491 units.

Q: Do all substitute parts meet RoHS3 compliance?

A: All identified substitute parts are ROHS3 compliant. The 476SAK250M, 450BXW47MEFR18X20, UCS2G470MHD6, and UCY2G470MHD3 all carry ROHS3 compliant status.

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