SN470M6R3ST Equivalent & Substitute Parts Reference

Part Overview

The SN470M6R3ST is a 47 µF, 6.3 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The part operates across a temperature range of -40°C to 85°C with a rated lifetime of 1000 hours at 85°C and is suitable for general-purpose applications requiring through-hole mounting.

Key Parameters

Parameter	Value
Capacitance	47 µF
Voltage Rating	6.3 V
Tolerance	±20%
ESR @ 120 Hz	6.78 Ohm
Lifetime @ 85°C	1000 Hrs
Operating Temperature Range	-40°C ~ 85°C
Ripple Current @ 120 Hz	84 mA
Lead Spacing	0.098" (2.50 mm)
Case Diameter	0.236" (6.00 mm)
Height (Seated Max)	0.433" (11.00 mm)
Mounting Type	Through Hole
Package Type	Radial, Can
Polarization	Bi-Polar
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the SN470M6R3ST is determined by the following critical parameters:

Mandatory Matching Parameters:

Capacitance: 47 µF (exact match required)
Tolerance: ±20% (exact match required)
Mounting Type: Through Hole (exact match required)
Package Type: Radial, Can (exact match required)
Lead Spacing: 0.098" (2.50 mm) (exact match required)
Polarization: Bi-Polar (exact match required)
Operating Temperature Range: -40°C ~ 85°C (minimum requirement)

Allowable Parameter Variations:

Voltage Rating: Substitute parts may have equal or higher voltage ratings than the original 6.3 V specification
Case Diameter: Minor dimensional variations within standard can sizes are acceptable
Height: Minor dimensional variations within standard can sizes are acceptable
ESR: Substitute parts may have different ESR values; lower ESR is generally acceptable
Lifetime @ 85°C: Substitute parts may have equal or longer lifetime ratings
Ripple Current: Substitute parts may have equal or higher ripple current ratings

The substitute parts identified (ECE-A1CN470U and ECE-A1EN470U) meet all mandatory matching parameters and provide equal or improved performance characteristics in allowable variation categories.

Parameter Comparison

Parameter	SN470M6R3ST (CDE)	ECE-A1CN470U (Panasonic)	ECE-A1EN470U (Panasonic)
Capacitance	47 µF	47 µF	47 µF
Voltage Rating	6.3 V	16 V	25 V
Tolerance	±20%	±20%	±20%
ESR @ 120 Hz	6.78 Ohm	Not Specified	Not Specified
Lifetime @ 85°C	1000 Hrs	2000 Hrs	2000 Hrs
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Ripple Current @ 120 Hz	84 mA	100 mA	110 mA
Lead Spacing	0.098" (2.50 mm)	0.098" (2.50 mm)	0.098" (2.50 mm)
Case Diameter	0.236" (6.00 mm)	0.248" (6.30 mm)	0.248" (6.30 mm)
Height (Seated Max)	0.433" (11.00 mm)	0.441" (11.20 mm)	0.441" (11.20 mm)
Mounting Type	Through Hole	Through Hole	Through Hole
Package Type	Radial, Can	Radial, Can	Radial, Can
Polarization	Bi-Polar	Bi-Polar	Bi-Polar
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

ECE-A1CN470U (Panasonic, 16 V Rating): This substitute provides a 16 V voltage rating, which exceeds the original 6.3 V specification. The part is currently in active production status, ensuring long-term availability. It maintains ROHS3 compliance and offers doubled lifetime rating (2000 hours at 85°C versus 1000 hours). The case diameter increases from 6.00 mm to 6.30 mm and height from 11.00 mm to 11.20 mm; these dimensional changes remain within standard radial can tolerances. Ripple current capacity increases to 100 mA at 120 Hz. This part is suitable for applications where the higher voltage rating does not create design constraints.

ECE-A1EN470U (Panasonic, 25 V Rating): This substitute provides a 25 V voltage rating, offering the highest voltage margin among available options. The part is currently in active production status with ROHS3 compliance. Lifetime rating is 2000 hours at 85°C. Case diameter and height dimensions match ECE-A1CN470U (6.30 mm and 11.20 mm respectively). Ripple current capacity is 110 mA at 120 Hz, the highest among all options. This part is suitable for applications requiring maximum voltage headroom and ripple current handling.

Selection Basis: Both substitute parts satisfy all mandatory parameter requirements. Selection between them depends on circuit voltage requirements and available board space. The dimensional increases (case diameter and height) are minor and fall within standard manufacturing tolerances for radial aluminum electrolytic capacitors. Both parts maintain full regulatory compliance (ROHS3) and offer improved reliability through extended lifetime ratings.

Frequently Asked Questions (FAQ)

Q: Can ECE-A1CN470U or ECE-A1EN470U be used as direct replacements for SN470M6R3ST?

A: Yes, both parts meet all mandatory substitution criteria: identical capacitance (47 µF), tolerance (±20%), lead spacing (2.50 mm), mounting type (through hole), package type (radial can), and polarization (bi-polar). The higher voltage ratings (16 V and 25 V respectively) are acceptable in applications originally designed for 6.3 V operation.

Q: What are the dimensional differences between the original part and substitutes?

A: The SN470M6R3ST has a case diameter of 6.00 mm and height of 11.00 mm. Both Panasonic substitutes have a case diameter of 6.30 mm and height of 11.20 mm. These increases of 0.30 mm in diameter and 0.20 mm in height are within standard tolerances for radial can capacitors and typically do not require PCB layout modifications.

Q: Why do the substitute parts have higher voltage ratings?

A: Higher voltage ratings are a standard result of manufacturing improvements and product line consolidation. A 16 V or 25 V rated capacitor can safely operate at lower voltages (such as 6.3 V) without performance degradation. The higher rating provides additional design margin and reliability.

Q: Are there any compliance or regulatory differences?

A: All three parts (original and both substitutes) are ROHS3 compliant. The Panasonic substitutes include REACH Unaffected status. No compliance barriers exist for substitution.

Q: What is the difference in ripple current handling?

A: The original SN470M6R3ST handles 84 mA ripple current at 120 Hz. ECE-A1CN470U handles 100 mA, and ECE-A1EN470U handles 110 mA at the same frequency. Higher ripple current capacity provides additional design margin in applications with significant AC current components.

Q: How do the lifetime ratings compare?

A: The original part is rated for 1000 hours at 85°C. Both Panasonic substitutes are rated for 2000 hours at 85°C, representing a 100% improvement in expected operational life under thermal stress.

Q: Which substitute should I select for a new design?

A: Selection depends on circuit voltage requirements. If the circuit operates at or below 6.3 V, ECE-A1CN470U (16 V) provides adequate margin. If higher voltage margin is desired or if the circuit may experience voltage transients, ECE-A1EN470U (25 V) is appropriate. Both parts are currently in active production and offer superior reliability compared to the obsolete original part.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message