ALS71A754QT040 Equivalent & Substitute Parts

Part Overview

The ALS71A754QT040 is a 750000 µF, 40 V aluminum electrolytic capacitor manufactured by KEMET in the ALS71 series. This radial, can-style capacitor with screw terminals is designed for general-purpose applications requiring high capacitance values with extended operational life. The part maintains an active product status and is ROHS3 compliant. Substitute parts are identified to provide alternative sourcing options when the primary part number is unavailable or when inventory constraints require component alternatives that meet identical electrical and mechanical specifications.

Substiute Parts

ALS71A754QT040

KEMETIn Stock: 902ALS71A754QT040 Datasheet

Current PartRFQ

ALS70A754QT040

KEMETIn Stock: 811ALS70A754QT040 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ALS71A754QT040 is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part ALS70A754QT040 qualifies as a direct equivalent based on the following criteria:

Electrical Parameter Equivalence:

• Identical capacitance value: 750000 µF
• Identical rated voltage: 40 V
• Identical tolerance: ±20%
• Identical ESR: 5 mOhm @ 100Hz
• Identical lifetime rating: 20000 Hrs @ 85°C
• Identical operating temperature range: -40°C to 85°C
• Identical ripple current specifications at both 100 Hz and 10 kHz
• Identical impedance: 7 mOhms

Mechanical Parameter Equivalence:

• Identical package type: Radial, Can - Screw Terminals
• Identical mounting type: Chassis Mount
• Identical physical dimensions: 3.543" diameter (90.00mm), 8.740" height (222.00mm)
• Identical lead spacing: 1.252" (31.80mm)

Compliance Equivalence:

• Both parts are ROHS3 compliant
• Both parts have MSL rating of 1 (Unlimited)
• Both parts are REACH unaffected
• Both parts share identical ECCN and HTSUS classifications

The only difference between the main part and substitute is the series designation (ALS71 versus ALS70), which reflects internal KEMET product line organization and does not affect functional performance or compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the ALS71A754QT040 and ALS70A754QT040 are active products from KEMET with full ROHS3 compliance and identical electrical and mechanical specifications. Selection between these parts should be based on availability and inventory status:

• ALS71A754QT040: 888 pieces in stock
• ALS70A754QT040: 781 pieces in stock

Both parts meet all regulatory requirements including ROHS3 compliance, REACH unaffected status, and unlimited moisture sensitivity rating (MSL 1). The parts are functionally interchangeable in all applications where the ALS71A754QT040 is specified. No design modifications, PCB layout changes, or mechanical adjustments are required when substituting between these part numbers.

Frequently Asked Questions (FAQ)

Q: Can ALS70A754QT040 be used as a direct replacement for ALS71A754QT040?

A: Yes. The ALS70A754QT040 is a direct parametric equivalent. All electrical specifications, mechanical dimensions, mounting requirements, and compliance certifications are identical. No circuit modifications are required.

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

A: No. Both parts deliver identical performance across all measured parameters including capacitance, voltage rating, ESR, ripple current handling, impedance, and lifetime rating at temperature.

Q: Do these parts require different PCB footprints or mounting hardware?

A: No. Both parts use identical screw terminal connections, chassis mount configuration, and physical dimensions (3.543" diameter, 8.740" height, 1.252" lead spacing). Existing mounting hardware and PCB layouts are fully compatible.

Q: What is the significance of the series designation difference (ALS71 versus ALS70)?

A: The series designation reflects KEMET's internal product line organization and manufacturing categorization. It does not affect electrical performance, mechanical compatibility, or application suitability.

Q: Are both parts ROHS3 compliant?

A: Yes. Both ALS71A754QT040 and ALS70A754QT040 are ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity). Both are REACH unaffected.

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

A: Selection should be based on inventory availability and supply chain requirements. Both parts are functionally identical and interchangeable. The ALS71A754QT040 currently has higher inventory (888 pieces versus 781 pieces).

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

A: Yes. Both parts are rated for 42.7 A ripple current at 100 Hz and 43.7 A at 10 kHz, with 5 mOhm ESR at 100 Hz, making them suitable for applications requiring significant ripple current handling.

Q: What is the expected operational lifetime of these capacitors?

A: Both parts are rated for 20000 hours of operation at 85°C. Operating at lower temperatures extends the expected lifetime proportionally.