SS470M025ST - Equivalent & Substitute Parts

Part Overview

The SS470M025ST is a 47 µF, 25 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier Electronics (CDE). This component is classified as Obsolete, necessitating identification of equivalent and substitute parts for new designs and component replacement. The part operates across -40°C to 85°C with a rated lifetime of 1000 hours at 85°C, suitable for general-purpose applications requiring stable capacitance and low ESR characteristics.

Key Parameters

Parameter	Specification
Capacitance	47 µF
Tolerance	±20%
Voltage - Rated	25 V
ESR (Equivalent Series Resistance)	4.23 Ω @ 120 Hz
Lifetime @ Temperature	1000 Hrs @ 85°C
Operating Temperature Range	-40°C to 85°C
Ripple Current @ 120 Hz	71 mA
Ripple Current @ 1 kHz	78.1 mA
Lead Spacing	0.098" (2.50 mm)
Size / Dimension	0.248" Dia (6.30 mm)
Height - Seated (Max)	0.276" (7.00 mm)
Mounting Type	Through Hole
Package / Case	Radial, Can
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the SS470M025ST are evaluated based on the following critical parameters that determine functional compatibility:

Core Electrical Parameters: Capacitance (47 µF), tolerance (±20%), and rated voltage (25 V) establish the fundamental electrical function. Substitute parts must maintain these specifications to ensure circuit performance.

Physical Compatibility: Lead spacing (0.098" / 2.50 mm), component diameter (0.248" / 6.30 mm), and maximum height (0.276" / 7.00 mm) determine board-level fit. Through-hole mounting configuration must be preserved.

Thermal and Lifetime Characteristics: Operating temperature range (-40°C to 85°C) and ESR performance influence reliability in specific applications. Lifetime ratings at temperature provide service durability metrics.

Compliance: RoHS3 compliance status ensures regulatory alignment across all substitute candidates.

The substitute parts are classified into three categories based on parameter alignment:

Direct Equivalent (ECE-A1EKA470I): Identical capacitance, voltage, tolerance, physical dimensions, lead spacing, and operating temperature range. Matches ripple current specifications and mounting configuration.

Similar Substitute (SK470M025ST, ECE-A1EKA470): Identical electrical specifications (capacitance, voltage, tolerance) and operating temperature. Lead spacing and physical footprint match primary part. SK470M025ST demonstrates improved ESR and lifetime at temperature.

Higher Voltage Substitute (ESH476M035AE3AA): Maintains 47 µF capacitance and ±20% tolerance at elevated 35 V rating. Compatible lead spacing and mounting type. Enhanced thermal performance (2000 Hrs @ 105°C) and improved ripple current handling.

Parameter Comparison

Parameter	SS470M025ST (Main)	SK470M025ST	ECE-A1EKA470I	ECE-A1EKA470	ESH476M035AE3AA
Manufacturer	Cornell Dubilier (CDE)	Cornell Dubilier (CDE)	Panasonic	Panasonic	KEMET
Capacitance	47 µF	47 µF	47 µF	47 µF	47 µF
Tolerance	±20%	±20%	±20%	±20%	±20%
Voltage - Rated	25 V	25 V	25 V	25 V	35 V
ESR @ 120 Hz	4.23 Ω	3.95 Ω	—	—	—
Lifetime @ Temp	1000 Hrs @ 85°C	2000 Hrs @ 85°C	1000 Hrs @ 85°C	1000 Hrs @ 85°C	2000 Hrs @ 105°C
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C	-40°C to 105°C
Ripple Current @ 120 Hz	71 mA	—	70 mA	70 mA	115 mA
Ripple Current @ 1 kHz / 10 kHz	78.1 mA @ 1 kHz	—	119 mA @ 10 kHz	119 mA @ 10 kHz	330 mA @ 10 kHz
Lead Spacing	0.098" (2.50 mm)	0.079" (2.00 mm)	0.098" (2.50 mm)	0.098" (2.50 mm)	0.098" (2.50 mm)
Size / Dimension	0.248" Dia (6.30 mm)	0.197" Dia (5.00 mm)	0.248" Dia (6.30 mm)	0.248" Dia (6.30 mm)	0.236" Dia (6.00 mm)
Height - Seated (Max)	0.276" (7.00 mm)	0.512" (13.00 mm)	0.276" (7.00 mm)	0.276" (7.00 mm)	0.492" (12.50 mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Selection: ECE-A1EKA470I or ECE-A1EKA470 (Panasonic)

Both ECE-A1EKA470I and ECE-A1EKA470 provide direct parametric equivalence to the obsolete SS470M025ST. These parts maintain identical capacitance, voltage rating, tolerance, operating temperature range, and physical dimensions. Both are classified as Active products with ROHS3 compliance and REACH unaffected status, ensuring long-term supply availability and regulatory alignment. ECE-A1EKA470I is available in Cut Tape packaging with 66,726 units in stock, while ECE-A1EKA470 is available in Bulk packaging with 13,190 units in stock.

Secondary Selection: SK470M025ST (Cornell Dubilier)

SK470M025ST offers electrical equivalence with improved performance characteristics. Operating at identical voltage and capacitance, this part demonstrates superior ESR (3.95 Ω versus 4.23 Ω) and doubled lifetime rating (2000 Hrs @ 85°C). The part is Active with ROHS3 compliance. Lead spacing is reduced to 0.079" (2.00 mm) and height is increased to 0.512" (13.00 mm), requiring board layout verification before selection.

Alternative Selection: ESH476M035AE3AA (KEMET)

This substitute elevates the voltage rating to 35 V while maintaining 47 µF capacitance and ±20% tolerance. Enhanced thermal capability (2000 Hrs @ 105°C) and significantly improved ripple current performance (115 mA @ 120 Hz, 330 mA @ 10 kHz) support applications requiring higher thermal headroom or increased ripple current handling. Lead spacing matches the primary part at 0.098" (2.50 mm), though diameter is slightly reduced (0.236" versus 0.248") and height is increased (0.492" versus 0.276"), necessitating footprint validation.

Frequently Asked Questions (FAQ)

Q: Can ECE-A1EKA470I directly replace the SS470M025ST in existing designs?

A: Yes. ECE-A1EKA470I provides direct substitution. Identical capacitance (47 µF), voltage rating (25 V), tolerance (±20%), lead spacing (0.098" / 2.50 mm), component diameter (0.248" / 6.30 mm), height (0.276" / 7.00 mm), and through-hole mounting configuration ensure mechanical and electrical compatibility. Operating temperature range (-40°C to 85°C) matches the original specification.

Q: What is the key difference between ECE-A1EKA470 and ECE-A1EKA470I?

A: Both parts are parametrically identical in electrical and physical specifications. ECE-A1EKA470I is packaged in Cut Tape (CT) format with higher inventory (66,726 units), while ECE-A1EKA470 is supplied in Bulk packaging with lower inventory (13,190 units). Selection depends on procurement and assembly process requirements.

Q: Why is SK470M025ST larger (13.00 mm height) than the SS470M025ST (7.00 mm)?

A: SK470M025ST achieves extended lifetime (2000 Hrs @ 85°C versus 1000 Hrs) and lower ESR (3.95 Ω versus 4.23 Ω) through different internal construction, resulting in increased physical height. Lead spacing is also reduced to 0.079" (2.00 mm). Board layout must be verified to accommodate these dimensional changes.

Q: When should ESH476M035AE3AA be selected over the direct equivalent?

A: ESH476M035AE3AA provides advantages in applications with higher voltage margins, elevated operating temperatures, or demanding ripple current conditions. The 35 V rating provides 40% voltage headroom above the original 25 V design specification. Enhanced lifetime at 105°C (versus 85°C) and superior ripple current capacity (115 mA @ 120 Hz versus 71 mA) support more demanding thermal and current environments. Physical dimensions differ, requiring circuit board validation.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute candidates listed—SK470M025ST, ECE-A1EKA470I, ECE-A1EKA470, and ESH476M035AE3AA—maintain ROHS3 compliance, ensuring regulatory compatibility with environmental and hazardous substance restrictions.

Q: How does lead spacing affect part selection?

A: Lead spacing determines through-hole pad center-to-center distance on the circuit board. The primary part and most direct substitutes (ECE-A1EKA470I, ECE-A1EKA470, ESH476M035AE3AA) maintain 0.098" (2.50 mm) spacing, enabling direct board layout compatibility. SK470M025ST uses reduced spacing (0.079" / 2.00 mm), requiring board redesign or custom hole drilling to accommodate installation.

Q: What ESR specification indicates lower impedance performance?

A: Lower ESR values indicate reduced impedance. SK470M025ST (3.95 Ω @ 120 Hz) provides 6.6% lower ESR than SS470M025ST (4.23 Ω @ 120 Hz), reducing heat generation and voltage ripple in power supply applications. This improvement contributes to the extended lifetime rating.

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