Equivalent & Substitute Parts for KEMET ALS81A122DF400

Part Overview

The KEMET ALS81A122DF400 is a 1200 µF, 400 V aluminum electrolytic capacitor with radial, can-style screw terminals, designed for general purpose applications. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when inventory constraints, supply chain disruptions, or manufacturing discontinuations necessitate alternative component selection while maintaining electrical and mechanical compatibility within specified parameters.

Substiute Parts

ALS81A122DF400

KEMETIn Stock: 1092ALS81A122DF400 Datasheet

Current PartRFQ

ALS80A122DF400

KEMETIn Stock: 1018ALS80A122DF400 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the KEMET ALS81A122DF400 is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match):

• Capacitance: 1200 µF
• Voltage Rating: 400 V
• Tolerance: ±20%
• ESR @ 100Hz: 113 mOhm
• Lifetime @ Temperature: 6000 Hrs @ 105°C
• Operating Temperature Range: -40°C ~ 105°C
• Ripple Current @ 100 Hz: 4.7 A
• Ripple Current @ 10 kHz: 10.6 A
• Impedance: 64 mOhms

Mechanical Parameters (Must Match):

• Package / Case: Radial, Can - Screw Terminals
• Mounting Type: Chassis Mount
• Lead Spacing: 0.504" (12.80 mm)
• Size / Dimension: 1.417" Dia (36.00 mm)
• Height - Seated (Max): 4.213" (107.00 mm)

Compliance Parameters (Must Match):

• RoHS Status: ROHS3 Compliant
• Polarization: Polar

The substitute part ALS80A122DF400 meets all specified electrical, mechanical, and compliance requirements and is therefore classified as a parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the KEMET ALS81A122DF400 and ALS80A122DF400 are Active product status components with full RoHS3 compliance and REACH unaffected status. Selection between these parts is based on availability and inventory status:

• ALS81A122DF400: 1055 pieces in stock
• ALS80A122DF400: 938 pieces in stock

Both components satisfy identical electrical performance specifications, mechanical dimensions, and regulatory requirements. The primary distinction is the series designation (ALS81 versus ALS80), which reflects internal design generation differences within KEMET's product line. This difference does not affect functional equivalence for applications requiring 1200 µF, 400 V aluminum electrolytic capacitors with screw terminal connections.

Frequently Asked Questions (FAQ)

Q: Can ALS80A122DF400 be used as a direct replacement for ALS81A122DF400?

A: Yes. Both parts are parametric equivalents with identical electrical specifications, mechanical dimensions, lead spacing, and compliance certifications. Direct substitution is permissible without circuit modification.

Q: Are there any differences in performance between these two parts?

A: No. Both parts deliver identical capacitance (1200 µF), voltage rating (400 V), ESR (113 mOhm @ 100Hz), ripple current ratings, impedance, and thermal lifetime specifications.

Q: Do the screw terminal connections differ between these parts?

A: No. Both parts use identical Radial, Can - Screw Terminal packaging with 0.504" (12.80 mm) lead spacing and identical physical dimensions (1.417" diameter, 4.213" maximum seated height).

Q: Are both parts suitable for chassis mount applications?

A: Yes. Both parts are classified as Chassis Mount components with identical mounting specifications.

Q: What is the significance of the series designation change from ALS81 to ALS80?

A: The series designation reflects KEMET's internal product generation classification. This does not impact electrical performance, mechanical compatibility, or functional equivalence for the specified application parameters.

Q: Are both parts RoHS3 compliant?

A: Yes. Both ALS81A122DF400 and ALS80A122DF400 are ROHS3 compliant and REACH unaffected.

Q: Can these parts be used in high-ripple-current applications?

A: Yes. Both parts are rated for 4.7 A ripple current at 100 Hz and 10.6 A ripple current at 10 kHz, supporting general purpose applications with specified ripple current demands.