AFK337M25F24B-F Equivalent & Substitute Parts

Part Overview

The AFK337M25F24B-F is a 330 µF, 25 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 discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers. Substitute parts must maintain electrical performance characteristics and mechanical compatibility for direct board-level replacement.

Substiute Parts

AFK337M25F24B-F

Cornell Dubilier Electronics (CDE)In Stock: 865AFK337M25F24B-F Datasheet

Current PartRFQ

EEE-FK1E331AP

Panasonic Electronic ComponentsIn Stock: 4984EEE-FK1E331AP Datasheet

DirectRFQ

EEE-FK1E331P

Panasonic Electronic ComponentsIn Stock: 83070EEE-FK1E331P Datasheet

DirectRFQ

EMZA250ARA331MHA0G

Chemi-ConIn Stock: 5276EMZA250ARA331MHA0G Datasheet

DirectRFQ

UCL1E331MNL1GS

NichiconIn Stock: 8648UCL1E331MNL1GS Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict adherence to the following parameters:

Mandatory Matching Parameters:

• Capacitance: 330 µF (exact match required)
• Voltage Rating: 25 V (exact match required)
• Tolerance: ±20% (substitute tolerance must be equal or tighter)
• Package Type: Radial, Can - SMD (exact match required)
• Physical Dimensions: 0.315" Dia (8.00mm) and height within compatible range
• Polarization: Polar (exact match required)
• Operating Temperature Range: -55°C ~ 105°C (substitute must cover or exceed this range)
• Lifetime @ 105°C: 2000 Hrs minimum (substitute must meet or exceed)

Compliance Parameters:

• RoHS3 Compliant (required for regulatory alignment)
• Moisture Sensitivity Level: 1 (Unlimited) or equivalent

All four substitute parts listed meet these mandatory criteria and are qualified for direct replacement in the original application circuit.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Panasonic FK Series):

EEE-FK1E331AP and EEE-FK1E331P are direct functional equivalents from Panasonic Electronic Components. Both parts maintain identical electrical specifications (330 µF, 25 V, ±20% tolerance) and physical dimensions. EEE-FK1E331P offers higher inventory availability (83,030 pcs) compared to EEE-FK1E331AP (4,971 pcs). Both are AEC-Q200 qualified and ROHS3 compliant. The Panasonic FK series is actively manufactured and represents the most straightforward replacement path.

Secondary Substitute (Chemi-Con Alchip™ MZA Series):

EMZA250ARA331MHA0G from Chemi-Con meets all mandatory electrical and mechanical parameters. This part features identical capacitance, voltage rating, tolerance, and operating temperature range. The Alchip™ MZA series is actively produced with 5,200 pcs in stock. AEC-Q200 qualification and ROHS3 compliance are confirmed. This option provides supply diversity.

Alternative Substitute (Nichicon UCL Series):

UCL1E331MNL1GS from Nichicon satisfies all core electrical requirements with 330 µF capacitance and 25 V rating. Physical height is 0.394" (10.00mm) versus the original 0.413" (10.50mm), which remains compatible with standard PCB layouts. This part exhibits lower impedance (80 mOhms) and higher ripple current capability (850 mA @ 100 kHz) compared to the original specification. The UCL series is actively manufactured with 8,558 pcs available. ROHS3 compliance is confirmed; however, AEC-Q200 rating is not specified for this part.

Selection Criteria:

For automotive applications requiring AEC-Q200 qualification, select from Panasonic EEE-FK1E331AP, EEE-FK1E331P, or Chemi-Con EMZA250ARA331MHA0G. For general-purpose applications where AEC-Q200 is not mandatory, Nichicon UCL1E331MNL1GS is acceptable. All four parts are ROHS3 compliant and carry MSL 1 (Unlimited) ratings.

Frequently Asked Questions (FAQ)

Q: Can EEE-FK1E331AP and EEE-FK1E331P be used interchangeably?

A: Yes. Both Panasonic parts share identical electrical specifications (330 µF, 25 V, ±20% tolerance), physical dimensions (0.315" Dia × 0.413" H), and compliance ratings (AEC-Q200, ROHS3). The primary difference is packaging format (both Tape & Reel) and inventory availability. Selection between them depends on supply chain requirements.

Q: What is the difference between the original AFK337M25F24B-F and the Panasonic substitutes regarding ESR?

A: The original part specifies 160 mOhm ESR @ 100 kHz. Panasonic EEE-FK1E331AP and EEE-FK1E331P do not provide explicit ESR values in the available data, but both specify 160 mOhms impedance, which is consistent with the original specification.

Q: Is the Nichicon UCL1E331MNL1GS suitable for automotive applications?

A: The Nichicon UCL1E331MNL1GS meets electrical and thermal specifications but does not carry AEC-Q200 qualification. For automotive applications requiring AEC-Q200 compliance, use Panasonic FK series or Chemi-Con Alchip™ MZA series instead.

Q: Does the height difference of UCL1E331MNL1GS (0.394" vs. 0.413") affect PCB compatibility?

A: The 0.019" (0.50mm) height reduction is within standard PCB layout tolerances for surface mount components. Physical footprint compatibility is maintained. Verify clearance with specific board design constraints if height-critical applications are involved.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All four substitute parts (Panasonic EEE-FK1E331AP, EEE-FK1E331P, Chemi-Con EMZA250ARA331MHA0G, and Nichicon UCL1E331MNL1GS) are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings.

Q: What is the primary reason for substitution?

A: The original AFK337M25F24B-F from Cornell Dubilier Electronics is discontinued at DiGi Electronics. All listed substitutes are actively manufactured by major capacitor suppliers, ensuring long-term availability and supply chain continuity.

Q: Can I use multiple substitute parts within the same design?

A: Yes, provided all parts meet the application's electrical and compliance requirements. Using parts from different manufacturers (Panasonic, Chemi-Con, Nichicon) within a single design is acceptable from an engineering standpoint, as all meet identical core specifications. Verify procurement and quality assurance procedures with your supply chain management.