Equivalent & Substitute Parts for ALS81H122DF400

Part Overview

The ALS81H122DF400 is a 1200 µF, 400 V aluminum electrolytic capacitor manufactured by KEMET, designed for general purpose applications requiring high capacitance and voltage ratings. This radial, can-style capacitor with screw terminals is specified for chassis mount installations. The part maintains Active product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified to provide alternative sourcing options when the primary part number becomes unavailable or when inventory constraints require component alternatives meeting identical electrical and mechanical specifications.

Substiute Parts

ALS81H122DF400

KEMETIn Stock: 1125ALS81H122DF400 Datasheet

Current PartRFQ

ALS80A122DF400

KEMETIn Stock: 1018ALS80A122DF400 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ALS81H122DF400 is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part ALS80A122DF400 qualifies as a parametric equivalent based on the following criteria:

Electrical Parameter Equivalence:

• Identical capacitance value: 1200 µF
• Identical voltage rating: 400 V
• Identical tolerance: ±20%
• Identical ESR: 113 mOhm @ 100Hz
• Identical lifetime specification: 6000 Hrs @ 105°C
• Identical operating temperature range: -40°C to 105°C
• Identical ripple current specifications at both 100 Hz and 10 kHz
• Identical impedance: 64 mOhms

Mechanical Parameter Equivalence:

• Identical package type: Radial, Can - Screw Terminals
• Identical mounting type: Chassis Mount
• Identical lead spacing: 0.504" (12.80mm)
• Identical physical dimensions: 1.417" diameter, 4.213" maximum seated height
• Identical polarization: Polar

Compliance Equivalence:

• Both parts maintain Active product status
• Both parts are ROHS3 Compliant
• Both parts are REACH Unaffected
• Both parts carry identical ECCN and HTSUS classifications

The only distinction between the main part and substitute is the series designation (ALS81 versus ALS80A), which reflects internal KEMET product line organization and does not affect functional performance or application compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the ALS81H122DF400 and ALS80A122DF400 are suitable for direct substitution in applications requiring 1200 µF, 400 V aluminum electrolytic capacitors with screw terminal connections. Selection between these parts should be based on inventory availability and lead time considerations.

Primary Selection Criteria:

The ALS81H122DF400 is the designated primary part number. Current inventory shows 1064 pieces in stock.

The ALS80A122DF400 serves as the parametric equivalent substitute with 938 pieces currently available.

Both parts maintain Active product status, ensuring continued manufacturer support and availability. Both parts satisfy ROHS3 compliance requirements and carry REACH unaffected designation, making them suitable for applications subject to environmental and regulatory compliance mandates.

The identical electrical specifications—including 113 mOhm ESR at 100 Hz, 6000-hour lifetime at 105°C, and matched ripple current ratings—ensure equivalent performance in power supply filtering, energy storage, and general purpose capacitor applications.

The identical mechanical specifications—including 0.504" lead spacing, 1.417" diameter, and 4.213" maximum height—confirm direct compatibility with existing PCB layouts and chassis mount installations without requiring design modifications.

Frequently Asked Questions (FAQ)

Q: Can ALS80A122DF400 be used as a direct replacement for ALS81H122DF400?

A: Yes. The ALS80A122DF400 is a parametric equivalent with identical electrical and mechanical specifications. All critical parameters including capacitance, voltage rating, ESR, lifetime, operating temperature range, ripple current ratings, and physical dimensions match exactly. No circuit modifications or PCB layout changes are required.

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

A: No. Both parts deliver identical electrical performance. The ESR of 113 mOhm at 100 Hz, impedance of 64 mOhms, ripple current handling at 100 Hz and 10 kHz, and 6000-hour lifetime at 105°C are identical across both part numbers.

Q: Do both parts use the same screw terminal configuration?

A: Yes. Both the ALS81H122DF400 and ALS80A122DF400 feature identical radial, can-style packages with screw terminals. Lead spacing is 0.504" (12.80mm) for both parts, ensuring compatibility with existing terminal block connections.

Q: What is the physical footprint difference between these parts?

A: There is no physical footprint difference. Both parts have identical dimensions: 1.417" diameter and 4.213" maximum seated height. They are suitable for the same chassis mount installations.

Q: Are both parts RoHS3 compliant?

A: Yes. Both the ALS81H122DF400 and ALS80A122DF400 are ROHS3 Compliant and REACH Unaffected, meeting current environmental and regulatory requirements.

Q: Which part should be selected if both are available?

A: Selection should be based on inventory availability and procurement lead times. Both parts are functionally and mechanically equivalent. The ALS81H122DF400 is the primary part number with current inventory of 1064 pieces. The ALS80A122DF400 is available with 938 pieces in stock as an alternative source.

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, making them suitable for applications requiring significant AC current handling in power supply and filtering circuits.

Q: What is the operating temperature range for both parts?

A: Both parts operate across -40°C to 105°C. The 6000-hour lifetime specification applies at the maximum operating temperature of 105°C.