ALS70U274NF040 Equivalent & Substitute Parts

Part Overview

The ALS70U274NF040 is a 270000 µF, 40 V aluminum electrolytic capacitor manufactured by KEMET in the ALS70 series. This radial, can-style capacitor with screw terminals is designed for general purpose applications requiring high capacitance values at moderate voltage ratings. The part is currently active in production with 938 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Substiute Parts

ALS70U274NF040

KEMETIn Stock: 1041ALS70U274NF040 Datasheet

Current PartRFQ

ALS70A274NF040

KEMETIn Stock: 866ALS70A274NF040 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of aluminum electrolytic capacitors is determined by strict equivalence across electrical and mechanical parameters. For the ALS70U274NF040, substitute parts must match the following criteria:

Electrical Parameters:

• Capacitance: 270000 µF (exact match required)
• Voltage Rating: 40 V (exact match required)
• Tolerance: ±20% (exact match required)
• ESR: 9 mOhm @ 100Hz (exact match required)
• Lifetime: 20000 Hrs @ 85°C (exact match required)
• Operating Temperature: -40°C ~ 85°C (exact match required)
• Ripple Current: 27.8 A @ 100 Hz and 28.8 A @ 10 kHz (exact match required)

Mechanical Parameters:

• Package Type: Radial, Can - Screw Terminals (exact match required)
• Mounting Type: Chassis Mount (exact match required)
• Physical Dimensions: 3.031" Dia (77.00mm), Height 4.213" (107.00mm), Lead Spacing 1.252" (31.80mm) (exact match required)

Compliance Parameters:

• RoHS Status: ROHS3 Compliant (exact match required)
• Moisture Sensitivity Level: 1 (Unlimited) (exact match required)

The ALS70A274NF040 meets all substitution criteria and is classified as a parametric equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the ALS70U274NF040 and ALS70A274NF040 are active production parts manufactured by KEMET with identical electrical and mechanical specifications. Selection between these parts is based on inventory availability and procurement requirements:

ALS70U274NF040: Primary selection with 938 units in current inventory.

ALS70A274NF040: Alternative selection with 795 units in current inventory. Provides equivalent performance and compliance for applications where the primary part is unavailable.

Both parts are ROHS3 compliant and REACH unaffected, meeting regulatory requirements for industrial and commercial applications. The identical ESR, ripple current ratings, and thermal characteristics ensure interchangeable performance in general purpose aluminum electrolytic capacitor applications.

Frequently Asked Questions (FAQ)

Q: Can ALS70A274NF040 be used as a direct replacement for ALS70U274NF040?

A: Yes. The ALS70A274NF040 is a parametric equivalent with identical capacitance, voltage rating, ESR, ripple current, thermal lifetime, and physical dimensions. Direct substitution is supported without circuit modification.

Q: Are there any differences in the screw terminal specifications between these parts?

A: No. Both parts feature identical radial, can-style screw terminals with 1.252" (31.80mm) lead spacing and are rated for chassis mount applications.

Q: Do both parts meet the same compliance standards?

A: Yes. Both ALS70U274NF040 and ALS70A274NF040 are ROHS3 compliant and REACH unaffected. Moisture sensitivity level is 1 (Unlimited) for both parts.

Q: What is the significance of the "U" and "A" designations in the part numbers?

A: The "U" and "A" designations differentiate the base product numbers within the ALS70 series. Both variants share identical electrical and mechanical specifications for the 270000 µF, 40 V configuration.

Q: Are these parts suitable for high ripple current applications?

A: Yes. Both parts are rated for 27.8 A ripple current at 100 Hz and 28.8 A at 10 kHz, supporting applications with significant AC current components.

Q: What is the thermal lifetime specification?

A: Both parts are rated for 20000 hours of operation at 85°C, establishing the expected service life under maximum temperature conditions.