ALS71A274NF040 Equivalent & Substitute Parts

Part Overview

The ALS71A274NF040 is a 270000 µF aluminum electrolytic capacitor rated at 40 V with screw terminals, manufactured by KEMET in the ALS71 series. This component is classified as an active product and is designed for general-purpose applications requiring high-capacitance energy storage in chassis-mounted configurations. The part features a radial can design with screw terminals, making it suitable for applications demanding robust mechanical connections and high ripple current handling at both low and high frequencies.

Equivalent and substitute parts are identified to provide design flexibility, support supply chain continuity, and accommodate component availability variations across different procurement channels and timeframes.

Substiute Parts

ALS71A274NF040

KEMETIn Stock: 740ALS71A274NF040 Datasheet

Current PartRFQ

ALS70A274NF040

KEMETIn Stock: 866ALS70A274NF040 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ALS71A274NF040 is determined by strict equivalence across the following critical parameters:

Electrical Parameters (Must Match):

• Capacitance: 270000 µF
• Voltage Rating: 40 V
• Tolerance: ±20%
• ESR @ 100Hz: 9 mOhm
• Lifetime @ 85°C: 20000 Hrs
• Operating Temperature Range: -40°C to 85°C
• Ripple Current @ 100 Hz: 27.8 A
• Ripple Current @ 10 kHz: 28.8 A
• Impedance: 10 mOhms

Mechanical Parameters (Must Match):

• Package Type: Radial, Can - Screw Terminals
• Mounting Type: Chassis Mount
• Lead Spacing: 31.80 mm
• Diameter: 77.00 mm
• Height - Seated (Max): 107.00 mm

Compliance & Regulatory (Must Match):

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)
• REACH Status: REACH Unaffected

The ALS70A274NF040 meets all specified criteria and is classified as a parametric equivalent within the KEMET aluminum electrolytic capacitor portfolio.

Parameter Comparison

Engineering Selection Recommendations

Both the ALS71A274NF040 and ALS70A274NF040 are active products manufactured by KEMET with identical electrical, mechanical, and compliance specifications. Selection between these parts is based on availability and procurement requirements rather than technical differentiation.

Compliance Verification:

• Both parts are ROHS3 compliant, meeting environmental regulatory requirements for restricted substances.
• Both parts maintain REACH unaffected status, indicating no conflict with chemical substance regulations.
• Both parts carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture-related handling restrictions during storage or assembly.

Application Suitability: The identical electrical parameters (270000 µF capacitance, 40 V rating, 9 mOhm ESR, 20000 Hrs @ 85°C lifetime) ensure both parts perform identically in general-purpose applications requiring high-capacitance energy storage with robust screw terminal connections.

Mechanical Compatibility: Identical package dimensions, lead spacing, and chassis mount configuration ensure direct mechanical interchangeability without PCB or mechanical assembly modifications.

Frequently Asked Questions (FAQ)

Q: Can ALS70A274NF040 be used as a direct replacement for ALS71A274NF040?

A: Yes. The ALS70A274NF040 is a parametric equivalent with identical electrical specifications, mechanical dimensions, and compliance certifications. Direct substitution is supported without circuit or assembly modifications.

Q: What is the difference between the ALS71 and ALS70 series designations?

A: The series designation reflects internal KEMET product line organization. Both series share identical electrical and mechanical specifications for this 270000 µF 40 V capacitor model. The difference is organizational rather than technical.

Q: Are the screw terminal connections identical between both parts?

A: Yes. Both parts feature radial can design with screw terminals, identical lead spacing of 31.80 mm, and identical mounting type (Chassis Mount). Terminal compatibility is confirmed.

Q: What is the maximum ripple current these capacitors can handle?

A: The ALS71A274NF040 and ALS70A274NF040 both support 27.8 A ripple current at 100 Hz and 28.8 A ripple current at 10 kHz. Selection should verify application ripple current requirements do not exceed these ratings.

Q: Are both parts suitable for -40°C to 85°C operating environments?

A: Yes. Both parts are rated for -40°C to 85°C operating temperature range. The 20000 Hrs lifetime specification applies at 85°C maximum operating temperature.

Q: What is the ESR (Equivalent Series Resistance) specification?

A: Both parts specify 9 mOhm ESR at 100 Hz, with impedance rated at 10 mOhms. These values determine power dissipation and thermal performance in ripple current applications.

Q: Are moisture-related handling precautions required?

A: No. Both parts carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture-related storage or handling restrictions during manufacturing or assembly processes.

Q: Can these capacitors be used in applications requiring ROHS3 compliance?

A: Yes. Both ALS71A274NF040 and ALS70A274NF040 are ROHS3 compliant and suitable for applications with environmental regulatory requirements for restricted substance elimination.