AFK686M2AH32B-F Equivalent & Substitute Parts

Part Overview

The AFK686M2AH32B-F is a 68 µF, 100 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a surface mount radial can package. This component is designed for automotive, bypass, and decoupling applications with AEC-Q200 qualification. The part is currently obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for direct board-level substitution.

Key Parameters

Parameter	Value	Substitution Relevance
Capacitance	68 µF	Critical - must match exactly
Voltage Rating	100 V	Critical - must match or exceed
Tolerance	±20%	Critical - must match
ESR @ 100 kHz	320 mOhm	Critical - electrical performance
Lifetime @ 105°C	5000 Hrs	Critical - reliability requirement
Operating Temperature Range	-55°C ~ 105°C	Critical - thermal compatibility
Ripple Current @ 100 kHz	500 mA	Critical - thermal stress rating
Package Type	Radial, Can - SMD	Critical - mechanical fit
Case Diameter	12.50 mm	Critical - PCB footprint
Case Height	14.00 mm	Critical - clearance requirement
AEC-Q200 Rating	Yes	Critical - automotive qualification
RoHS3 Compliance	Yes	Critical - regulatory requirement

Substitute Part Grouping Explanation

Substitution of the obsolete AFK686M2AH32B-F is based on strict electrical and mechanical parameter matching. The following criteria determine valid equivalents:

Electrical Parameters (Non-negotiable):

Capacitance: 68 µF (exact match)
Voltage Rating: 100 V (exact match)
Tolerance: ±20% (exact match)
ESR: 320 mOhm @ 100 kHz (exact match)
Lifetime: 5000 Hrs @ 105°C (exact match)
Operating Temperature: -55°C ~ 105°C (exact match)
Ripple Current @ 100 kHz: 500 mA (exact match)

Mechanical Parameters (Non-negotiable):

Package Type: Radial, Can - SMD (exact match)
Case Diameter: 12.50 mm (exact match)
Case Height: 14.00 mm (exact match)
Mounting Type: Surface Mount (exact match)

Compliance & Certification (Non-negotiable):

AEC-Q200 Automotive Rating (required)
RoHS3 Compliance (required)
Moisture Sensitivity Level: 1 (Unlimited)

The identified substitute parts meet all specified parameters and are manufactured by Panasonic Electronic Components with active product status.

Parameter Comparison

Parameter	AFK686M2AH32B-F (CDE)	EEE-FK2A680AQ (Panasonic)	EEV-FK2A680Q (Panasonic)
Capacitance	68 µF	68 µF	68 µF
Voltage Rating	100 V	100 V	100 V
Tolerance	±20%	±20%	±20%
ESR @ 100 kHz	320 mOhm	320 mOhm	320 mOhm
Lifetime @ 105°C	5000 Hrs	5000 Hrs	5000 Hrs
Operating Temperature	-55°C ~ 105°C	-55°C ~ 105°C	-55°C ~ 105°C
Ripple Current @ 120 Hz	375 mA	375 mA	375 mA
Ripple Current @ 100 kHz	500 mA	500 mA	500 mA
Case Diameter	12.50 mm	12.50 mm	12.50 mm
Case Height	14.00 mm	14.00 mm	14.00 mm
Package Type	Radial, Can - SMD	Radial, Can - SMD	Radial, Can - SMD
Mounting Type	Surface Mount	Surface Mount	Surface Mount
AEC-Q200	Yes	Yes	Yes
RoHS3 Compliance	Yes	Yes	Yes
Product Status	Obsolete	Active	Active
Packaging Format	-	Tape & Reel (TR)	Tape & Reel (TR)

Engineering Selection Recommendations

Both substitute parts—EEE-FK2A680AQ and EEV-FK2A680Q—are manufactured by Panasonic Electronic Components and maintain active product status. Selection between these alternatives is based on the following engineering criteria:

EEE-FK2A680AQ:

Active product with 4566 units in stock
Specified applications include Automotive and High Temperature Reflow
Suitable for designs requiring reflow process compatibility
Panasonic FK series base product number

EEV-FK2A680Q:

Active product with 1006 units in stock
Specified applications include Automotive
Panasonic FK series base product number
Cross-reference documentation indicates compatibility with AFK686M2AH32B-F

Both parts satisfy all electrical, mechanical, and compliance requirements. Selection should be based on supply chain availability, packaging format requirements (Tape & Reel), and application-specific reflow process needs. The surface mount land size differs slightly between the main part (0.531" L x 0.590" W) and both substitutes (0.531" L x 0.531" W), requiring PCB footprint verification prior to implementation.

Frequently Asked Questions (FAQ)

Q: Can EEE-FK2A680AQ or EEV-FK2A680Q be used as direct replacements for AFK686M2AH32B-F?

A: Both Panasonic parts meet all specified electrical parameters (68 µF, 100 V, ±20%, 320 mOhm ESR, 5000 Hrs @ 105°C) and mechanical dimensions (12.50 mm diameter, 14.00 mm height, Radial Can SMD package). Both maintain AEC-Q200 automotive qualification and RoHS3 compliance. Direct substitution is electrically and mechanically valid. PCB land pattern adjustment is required due to surface mount land size variation.

Q: What is the difference between EEE-FK2A680AQ and EEV-FK2A680Q?

A: Both parts are Panasonic FK series aluminum electrolytic capacitors with identical electrical specifications and mechanical dimensions. The primary difference is the product designation prefix (EEE vs. EEV), which indicates different internal manufacturing or qualification pathways within Panasonic's product line. Both are active products with AEC-Q200 rating. EEE-FK2A680AQ includes High Temperature Reflow in its specified applications.

Q: Are there any compatibility concerns with the surface mount land size difference?

A: The original AFK686M2AH32B-F specifies a land size of 0.531" L x 0.590" W (13.50 mm x 15.00 mm). Both Panasonic substitutes specify 0.531" L x 0.531" W (13.50 mm x 13.50 mm). The width dimension is reduced by 0.059" (1.50 mm). PCB footprint verification and potential rework of solder pads is required before implementation.

Q: Do both substitute parts carry the same automotive certifications?

A: Both EEE-FK2A680AQ and EEV-FK2A680Q carry AEC-Q200 qualification, meeting automotive industry reliability standards. Both are RoHS3 compliant and REACH unaffected. Moisture Sensitivity Level is 1 (Unlimited) for both parts.

Q: What is the inventory status of these substitute parts?

A: EEE-FK2A680AQ has 4566 units in stock. EEV-FK2A680Q has 1006 units in stock. Both are available as new original components in Tape & Reel packaging format.

Q: Can these parts be used interchangeably in the same design?

A: Yes, from an electrical and mechanical standpoint, both parts are interchangeable. However, PCB footprint adjustment is necessary for both due to the surface mount land size difference. Once footprint compatibility is established, either part can be selected based on supply availability and lead time requirements.

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