AFK337M80P44B-F Equivalent & Substitute Parts

Part Overview

The AFK337M80P44B-F is a 330 µF, 80 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 automotive qualification. The part is discontinued at DiGi Electronics, necessitating identification of equivalent substitute components that maintain electrical and mechanical compatibility with existing designs.

Key Parameters

Parameter	Value
Capacitance	330 µF
Voltage Rating	80 V
Tolerance	±20%
ESR @ 100 kHz	170 mOhm
Lifetime @ 105°C	5000 Hrs
Operating Temperature Range	-55°C to 105°C
Ripple Current @ 120 Hz	594.8 mA
Ripple Current @ 100 kHz	793 mA
Case Diameter	0.630" (16.00 mm)
Height (Seated Max)	0.669" (17.00 mm)
Mounting Type	Surface Mount
Package Type	Radial, Can - SMD
AEC-Q200 Rated	Yes
RoHS3 Compliant	Yes
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the AFK337M80P44B-F is based on strict electrical and mechanical parameter matching. The following criteria determine equivalency:

Electrical Parameters (Must Match):

Capacitance: 330 µF
Voltage Rating: 80 V
Tolerance: ±20%
Impedance: 170 mOhms
Ripple Current @ 120 Hz: 594.8 mA
Ripple Current @ 100 kHz: 793 mA
Lifetime @ 105°C: 5000 Hrs
Operating Temperature Range: -55°C to 105°C

Mechanical Parameters (Must Match):

Case Diameter: 0.630" (16.00 mm)
Height (Seated Max): 0.669" (17.00 mm)
Mounting Type: Surface Mount
Package Type: Radial, Can - SMD

Compliance & Certification (Must Match):

AEC-Q200 Automotive Qualification
RoHS3 Compliance
MSL Rating: 1 (Unlimited)

The substitute parts identified below meet all electrical, mechanical, and compliance requirements for direct replacement in automotive, bypass, and decoupling applications.

Parameter Comparison

Parameter	AFK337M80P44B-F (CDE)	EEE-FK1K331AM (Panasonic)	EEV-FK1K331M (Panasonic)
Capacitance	330 µF	330 µF	330 µF
Voltage Rating	80 V	80 V	80 V
Tolerance	±20%	±20%	±20%
Impedance	170 mOhms	170 mOhms	170 mOhms
Lifetime @ 105°C	5000 Hrs	5000 Hrs	5000 Hrs
Operating Temperature Range	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C
Ripple Current @ 120 Hz	594.8 mA	594.8 mA	594.8 mA
Ripple Current @ 100 kHz	793 mA	793 mA	793 mA
Case Diameter	0.630" (16.00 mm)	0.630" (16.00 mm)	0.630" (16.00 mm)
Height (Seated Max)	0.669" (17.00 mm)	0.669" (17.00 mm)	0.669" (17.00 mm)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package Type	Radial, Can - SMD	Radial, Can - SMD	Radial, Can - SMD
AEC-Q200 Rated	Yes	Yes	Yes
RoHS3 Compliant	Yes	Yes	Yes
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Discontinued	Active	Active

Engineering Selection Recommendations

Both Panasonic substitute parts—EEE-FK1K331AM and EEV-FK1K331M—are direct electrical and mechanical equivalents to the discontinued AFK337M80P44B-F. Selection between these two Panasonic alternatives is based on the following factors:

EEE-FK1K331AM:

Active product status with continuous manufacturing support
Qualified for automotive and high-temperature reflow applications
Supplied in Tape & Reel packaging
Surface mount land size: 0.669" L × 0.669" W (17.00 mm × 17.00 mm)
980 pieces available in current inventory

EEV-FK1K331M:

Active product status with continuous manufacturing support
Qualified for automotive applications
Supplied in Tape & Reel packaging
Surface mount land size: 0.669" L × 0.669" W (17.00 mm × 17.00 mm)
703 pieces available in current inventory

Both parts maintain full AEC-Q200 automotive qualification, RoHS3 compliance, and unlimited moisture sensitivity level rating. The primary distinction is application scope: EEE-FK1K331AM includes high-temperature reflow qualification, while EEV-FK1K331M is specified for general automotive use. Selection should be based on specific application requirements and PCB land pattern compatibility.

Frequently Asked Questions (FAQ)

Q: Can EEE-FK1K331AM or EEV-FK1K331M be used as direct replacements for AFK337M80P44B-F without PCB modification?

A: Both Panasonic parts are direct replacements. However, verify PCB land pattern compatibility. The original AFK337M80P44B-F specifies surface mount land size of 0.669" L × 0.748" W (17.00 mm × 19.00 mm), while both Panasonic substitutes specify 0.669" L × 0.669" W (17.00 mm × 17.00 mm). PCB land pattern adjustment may be required.

Q: Are the substitute parts qualified for automotive applications?

A: Yes. Both EEE-FK1K331AM and EEV-FK1K331M carry AEC-Q200 automotive qualification, matching the original AFK337M80P44B-F specification.

Q: What is the difference between EEE-FK1K331AM and EEV-FK1K331M?

A: Both parts are electrically and mechanically identical with matching capacitance, voltage, impedance, ripple current, and thermal specifications. EEE-FK1K331AM includes high-temperature reflow application qualification, while EEV-FK1K331M is specified for general automotive use. Both are active products with continuous manufacturing support.

Q: Do the substitute parts meet RoHS3 and MSL requirements?

A: Yes. Both EEE-FK1K331AM and EEV-FK1K331M are RoHS3 compliant with MSL rating 1 (Unlimited), matching the original part specifications.

Q: What is the impedance specification for these capacitors?

A: All three parts—the original AFK337M80P44B-F and both Panasonic substitutes—specify 170 mOhms impedance at 100 kHz, ensuring equivalent performance in bypass and decoupling circuits.

Q: Are there packaging differences between the original and substitute parts?

A: The original AFK337M80P44B-F packaging is not specified in available data. Both Panasonic substitutes are supplied in Tape & Reel (TR) packaging. Confirm packaging requirements for your procurement process.

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