ALS71H114KF040 Equivalent & Substitute Parts

Part Overview

The ALS71H114KF040 is a 110000 µF, 40 V aluminum electrolytic capacitor 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 values in chassis-mount configurations. The part features a 13 mOhm equivalent series resistance at 100 Hz and is rated for 18000 hours at 85°C operating temperature.

Substitute parts are identified when equivalent electrical and mechanical parameters allow direct replacement without circuit redesign or performance degradation. The ALS71H114KF040 has one parametric equivalent available that maintains critical specifications while offering alternative availability or inventory advantages.

Substiute Parts

ALS71H114KF040

KEMETIn Stock: 822ALS71H114KF040 Datasheet

Current PartRFQ

ALS70A114KF040

KEMETIn Stock: 1174ALS70A114KF040 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ALS71H114KF040 is determined by strict equivalence across the following parameters:

Electrical Parameters (Non-Negotiable):

• Capacitance value: 110000 µF (exact match required)
• Rated voltage: 40 V (substitute must equal or exceed)
• Tolerance: ±20% (must match)
• Operating temperature range: -40°C to 85°C (must match)
• Lifetime rating: 18000 hours at 85°C (must match or exceed)

Mechanical Parameters (Non-Negotiable):

• Package type: Radial, Can - Screw Terminals (exact match required)
• Lead spacing: 22.20 mm (exact match required)
• Physical dimensions: 51.00 mm diameter × 107.00 mm height (exact match required)
• Mounting type: Chassis Mount (exact match required)

Performance Parameters (Acceptable Variance):

• ESR @ 100Hz: 13-14 mOhm (minor variance acceptable within thermal design margins)
• Ripple current ratings: Must maintain minimum specified values

The ALS70A114KF040 qualifies as a parametric equivalent because it maintains all critical electrical and mechanical specifications while operating within acceptable performance tolerances.

Parameter Comparison

Engineering Selection Recommendations

Primary Part Selection: ALS71H114KF040

The ALS71H114KF040 is the specified component and remains the first choice when available. Current inventory status shows 754 pieces in stock. This part is active and fully supported by KEMET.

Substitute Selection: ALS70A114KF040

The ALS70A114KF040 is a direct parametric equivalent suitable for use when the primary part is unavailable. Selection criteria are based on the following factors:

1. Electrical Equivalence: All critical electrical parameters match exactly, including capacitance (110000 µF), rated voltage (40 V), tolerance (±20%), and temperature rating (-40°C to 85°C).

2. Mechanical Compatibility: Physical dimensions, lead spacing, and mounting configuration are identical, ensuring direct PCB and chassis compatibility without modification.

3. Performance Equivalence: ESR variance of 1 mOhm (14 mOhm vs. 13 mOhm) is within acceptable engineering tolerance for general-purpose applications. Ripple current ratings are identical.

4. Compliance Status: Both parts maintain identical RoHS3 compliance, REACH unaffected status, and moisture sensitivity ratings, ensuring regulatory and environmental compatibility.

5. Availability: The ALS70A114KF040 shows higher inventory availability (1070 pieces) compared to the primary part, providing supply chain flexibility.

Selection Logic:

Use ALS70A114KF040 as a substitute only when ALS71H114KF040 is unavailable. No circuit redesign, thermal analysis, or performance verification is required due to parametric equivalence. Both parts are manufactured by KEMET and operate within identical specifications for general-purpose applications.

Frequently Asked Questions (FAQ)

Q: Can the ALS70A114KF040 be used as a direct replacement for the ALS71H114KF040?

A: Yes. The ALS70A114KF040 is a parametric equivalent with identical capacitance, voltage rating, tolerance, temperature range, physical dimensions, and mounting configuration. The 1 mOhm ESR variance (14 mOhm vs. 13 mOhm) is within acceptable engineering tolerance and does not affect circuit performance in general-purpose applications.

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

A: The ALS71 and ALS70 are different product series within KEMET's aluminum electrolytic capacitor portfolio. For the 110000 µF, 40 V specification, both series offer equivalent electrical and mechanical performance. The series designation reflects internal design or manufacturing differences that do not impact substitution eligibility.

Q: Are the physical dimensions identical between both parts?

A: Yes. Both the ALS71H114KF040 and ALS70A114KF040 have identical dimensions: 51.00 mm diameter and 107.00 mm height. Lead spacing is also identical at 22.20 mm, ensuring compatibility with existing PCB layouts and chassis mounting configurations.

Q: Do both parts have the same compliance certifications?

A: Yes. Both parts are ROHS3 compliant, REACH unaffected, and carry identical moisture sensitivity ratings (MSL 1 - Unlimited). No compliance verification is required when substituting between these parts.

Q: What is the significance of the 1 mOhm ESR difference?

A: The ESR (Equivalent Series Resistance) difference of 1 mOhm between the ALS71H114KF040 (13 mOhm) and ALS70A114KF040 (14 mOhm) is negligible for general-purpose applications. Both parts maintain identical ripple current ratings (19.9 A @ 100 Hz and 21.4 A @ 10 kHz) and thermal performance (18000 hours @ 85°C).

Q: Can I use the ALS70A114KF040 in high-frequency or high-ripple-current applications?

A: Yes. The ALS70A114KF040 maintains identical ripple current specifications at both low frequency (19.9 A @ 100 Hz) and high frequency (21.4 A @ 10 kHz) compared to the ALS71H114KF040. No performance degradation occurs in these application categories.

Q: What should I do if both parts are unavailable?

A: Contact KEMET directly for alternative solutions. Do not substitute with parts that differ in capacitance value, voltage rating, tolerance, temperature range, physical dimensions, or mounting type, as these changes require circuit redesign and performance validation.

Q: Are there any thermal considerations when using the substitute part?

A: No. Both parts are rated for 18000 hours at 85°C operating temperature and share identical temperature operating ranges (-40°C to 85°C). Thermal design calculations remain unchanged when substituting between these parts.