ECA-2AM4R7B Equivalent & Substitute Parts

Part Overview

The ECA-2AM4R7B is a 4.7 µF, 100 V aluminum electrolytic capacitor in radial configuration manufactured by Panasonic Electronic Components. This component is rated for 2000 hours at 85°C and operates across the temperature range of -40°C to 85°C. The part is currently in active production status and is ROHS3 compliant. Substitute parts are necessary when the Cut Tape packaging of the ECA-2AM4R7B is unavailable or when alternative lead spacing configurations are required for specific PCB layouts.

Key Parameters

Parameter	Value
Capacitance	4.7 µF
Voltage - Rated	100 V
Tolerance	±20%
Lifetime @ Temperature	2000 Hrs @ 85°C
Operating Temperature Range	-40°C ~ 85°C
Polarization	Polar
Mounting Type	Through Hole
Package / Case	Radial, Can
Size / Dimension	0.197" Dia (5.00mm)
Height - Seated (Max)	0.472" (12.00mm)
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the ECA-2AM4R7B is determined by strict equivalence in the following parameters:

Capacitance: 4.7 µF (exact match required)
Voltage Rating: 100 V (exact match required)
Tolerance: ±20% (exact match required)
Lifetime: 2000 Hrs @ 85°C (exact match required)
Operating Temperature: -40°C ~ 85°C (exact match required)
Polarization: Polar (exact match required)
Package Type: Radial, Can (exact match required)
Mounting Type: Through Hole (exact match required)
Physical Dimensions: 0.197" Dia (5.00mm), Height 0.472" (12.00mm) (exact match required)
Compliance: ROHS3 Compliant (exact match required)

Variations in lead spacing, packaging format (Cut Tape vs. Bulk), and ESR values do not disqualify a part from substitution provided all electrical and mechanical parameters remain equivalent.

Parameter Comparison

Parameter	ECA-2AM4R7B	ECA-2AM4R7	ECA-2AM4R7I	SK4R7M100ST
Manufacturer	Panasonic	Panasonic	Panasonic	Cornell Dubilier Electronics
Capacitance	4.7 µF	4.7 µF	4.7 µF	4.7 µF
Voltage - Rated	100 V	100 V	100 V	100 V
Tolerance	±20%	±20%	±20%	±20%
Lifetime @ Temp.	2000 Hrs @ 85°C	2000 Hrs @ 85°C	2000 Hrs @ 85°C	2000 Hrs @ 85°C
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Polarization	Polar	Polar	Polar	Polar
Package / Case	Radial, Can	Radial, Can	Radial, Can	Radial, Can
Size / Dimension	0.197" Dia (5.00mm)	0.197" Dia (5.00mm)	0.197" Dia (5.00mm)	0.197" Dia (5.00mm)
Height - Seated (Max)	0.472" (12.00mm)	0.472" (12.00mm)	0.472" (12.00mm)	0.512" (13.00mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Lead Spacing	0.197" (5.00mm)	0.079" (2.00mm)	0.098" (2.50mm)	0.079" (2.00mm)
ESR (Equivalent Series Resistance)	Not specified	Not specified	Not specified	22.59 Ohm
Packaging Format	Cut Tape (CT)	Bulk	Cut Tape (CT)	Bulk

Engineering Selection Recommendations

All four parts listed meet the core electrical and mechanical requirements for substitution: 4.7 µF capacitance, 100 V voltage rating, ±20% tolerance, 2000 hour lifetime at 85°C, and ROHS3 compliance. Selection among these parts should be based on the following factors:

ECA-2AM4R7B and ECA-2AM4R7I are both supplied in Cut Tape packaging and are manufactured by Panasonic. These parts are preferred when automated assembly processes require tape-and-reel format.

ECA-2AM4R7 is supplied in Bulk packaging by Panasonic and is suitable for manual assembly or when tape packaging is not required.

SK4R7M100ST is manufactured by Cornell Dubilier Electronics and is supplied in Bulk packaging. This part has a maximum seated height of 0.512" (13.00mm), which exceeds the 0.472" (12.00mm) height of the Panasonic alternatives. Physical clearance verification is required before selection. The ESR specification of 22.59 Ohm is provided for this part.

All parts maintain active production status and are REACH unaffected.

Frequently Asked Questions (FAQ)

Q: Can ECA-2AM4R7 be used as a direct replacement for ECA-2AM4R7B?

A: Yes. Both parts are electrically and mechanically equivalent. The primary difference is packaging format: ECA-2AM4R7B is supplied in Cut Tape, while ECA-2AM4R7 is supplied in Bulk. Lead spacing differs (5.00mm vs. 2.00mm), so PCB layout compatibility must be confirmed.

Q: What is the significance of lead spacing differences among these parts?

A: Lead spacing determines the distance between the two leads on the PCB. ECA-2AM4R7B has 5.00mm spacing, ECA-2AM4R7 has 2.00mm spacing, and ECA-2AM4R7I has 2.50mm spacing. The PCB footprint must accommodate the selected lead spacing. Parts with different lead spacing cannot be used interchangeably without PCB redesign.

Q: Is SK4R7M100ST a suitable substitute for ECA-2AM4R7B?

A: SK4R7M100ST meets all electrical requirements and is ROHS3 compliant. However, its maximum seated height is 0.512" (13.00mm) compared to 0.472" (12.00mm) for the Panasonic parts. Physical clearance on the PCB must be verified before selection. Lead spacing is 2.00mm, requiring PCB layout confirmation.

Q: What does the ±20% tolerance specification mean?

A: The capacitance value may vary by up to 20% above or below the nominal 4.7 µF rating. All listed parts share this tolerance specification.

Q: Are all listed parts ROHS3 compliant?

A: Yes. All four parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the difference between Cut Tape and Bulk packaging?

A: Cut Tape packaging supplies components on a continuous tape suitable for automated pick-and-place assembly equipment. Bulk packaging supplies loose components suitable for manual assembly or alternative handling methods. Electrical and mechanical specifications are identical between packaging formats.

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