AFK477M50P44T-F Equivalent & Substitute Parts

Part Overview

The AFK477M50P44T-F is a 470 µF, 50 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in the AFK series. This surface mount radial can capacitor is designed for automotive, bypass, and decoupling applications with AEC-Q200 automotive qualification. The part is currently Active in product status with 1159 pieces in stock. Substitute parts are identified when equivalent capacitance and tolerance specifications are maintained while voltage ratings or packaging configurations differ to meet specific circuit requirements or inventory availability.

Substiute Parts

AFK477M50P44T-F

Cornell Dubilier Electronics (CDE)In Stock: 1227AFK477M50P44T-F Datasheet

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AFK477M63P44T-F

Cornell Dubilier Electronics (CDE)In Stock: 11980AFK477M63P44T-F Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the AFK477M50P44T-F is permissible with the AFK477M63P44T-F based on the following criteria:

Maintained Parameters (Substitution Basis):

• Capacitance: 470 µF (identical)
• Tolerance: ±20% (identical)
• Operating Temperature Range: -55°C to 105°C (identical)
• Lifetime: 5000 Hrs @ 105°C (identical)
• Series: AFK (identical)
• Mounting Type: Surface Mount (identical)
• Physical Dimensions: 16.00 mm diameter, 17.00 mm height (identical)
• Polarization: Polar (identical)
• AEC-Q200 Automotive Rating (identical)
• RoHS3 Compliance (identical)

Differing Parameters:

• Voltage Rating: 50 V (main part) vs. 63 V (substitute)
• ESR @ 100 kHz: 73 mOhm (main part) vs. 82 mOhm (substitute)
• Ripple Current @ 100 kHz: 1.61 A (main part) vs. 1.41 A (substitute)
• Packaging: Tape & Reel (main part) vs. Cut Tape & Digi-Reel® (substitute)

The substitute part operates at a higher voltage rating, which provides additional design margin in circuits operating at or below 50 V. The identical physical footprint and mounting characteristics ensure mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection (AFK477M50P44T-F): Select this part when the circuit design specifies a 50 V rated capacitor and the application requires Tape & Reel packaging for automated assembly processes. This part maintains the lowest ESR at 73 mOhm and highest ripple current rating at 1.61 A @ 100 kHz among the two options.

Substitute Part Selection (AFK477M63P44T-F): Select this part when:

• Circuit voltage stress is at or below 50 V and higher voltage margin is acceptable
• Cut Tape or Digi-Reel® packaging is compatible with assembly processes
• Inventory availability of the primary part is constrained (11894 pieces available vs. 1159 pieces for main part)
• The 9 mOhm increase in ESR and 0.20 A reduction in ripple current rating are within circuit tolerance margins

Both parts carry identical AEC-Q200 automotive qualification, RoHS3 compliance, and REACH unaffected status, confirming suitability for regulated applications. Both maintain -55°C to 105°C operating range and 5000 hour lifetime at 105°C.

Frequently Asked Questions (FAQ)

Q: Can AFK477M63P44T-F replace AFK477M50P44T-F in all applications?

A: Substitution is permissible when the circuit operates at voltages not exceeding 50 V. The 63 V rating of the substitute provides additional voltage margin. However, verify that the 9 mOhm higher ESR and 0.20 A lower ripple current rating do not exceed circuit performance requirements, particularly in high-frequency switching or high-ripple current applications.

Q: What is the difference between Tape & Reel and Cut Tape & Digi-Reel® packaging?

A: Tape & Reel (TR) packaging supplies components on continuous tape wound on a reel, suitable for high-volume automated pick-and-place assembly. Cut Tape & Digi-Reel® packaging provides components on cut tape segments or alternative reel formats, typically used for lower-volume production or mixed-component assembly. Both formats are compatible with standard surface mount assembly equipment; verify your assembly process compatibility before selection.

Q: Are both parts automotive qualified?

A: Yes. Both AFK477M50P44T-F and AFK477M63P44T-F carry AEC-Q200 automotive qualification, confirming compliance with automotive reliability and performance standards.

Q: What is the impact of the 9 mOhm ESR difference?

A: The substitute part (AFK477M63P44T-F) has 82 mOhm ESR compared to 73 mOhm for the main part. This 12% increase in ESR results in slightly higher impedance and power dissipation. In bypass and decoupling applications, this difference is typically negligible. In high-frequency or high-current ripple applications, calculate power dissipation (P = I²R) to confirm acceptability.

Q: Can I use AFK477M50P44T-F in a circuit designed for 63 V?

A: No. The AFK477M50P44T-F is rated for maximum 50 V. Using it in a 63 V circuit exceeds the voltage rating and risks capacitor failure. Use only the AFK477M63P44T-F or higher-rated equivalent in 63 V circuits.

Q: Are there any moisture sensitivity concerns?

A: Both parts carry MSL (Moisture Sensitivity Level) 1, indicating unlimited shelf life without moisture control requirements. Standard handling and storage practices are sufficient.