ALS70H184MF040 Equivalent & Substitute Parts

Part Overview

The ALS70H184MF040 is a 180000 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 in chassis-mount configurations. The part is currently Active in product status and maintains full RoHS3 compliance. Substitute parts are identified to provide alternative sourcing options when the primary part number is unavailable or when inventory constraints require component flexibility within equivalent electrical and mechanical specifications.

Substiute Parts

ALS70H184MF040

KEMETIn Stock: 783ALS70H184MF040 Datasheet

Current PartRFQ

ALS71A184MF040

KEMETIn Stock: 1000ALS71A184MF040 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ALS70H184MF040 is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part ALS71A184MF040 qualifies as a direct equivalent based on the following criteria:

Electrical Equivalence:

• Identical capacitance value: 180000 µF
• Identical voltage rating: 40 V
• Identical tolerance: ±20%
• Identical ESR: 9 mOhm @ 100 Hz
• Identical lifetime specification: 19000 Hrs @ 85°C
• Identical operating temperature range: -40°C ~ 85°C
• Identical ripple current ratings at both 100 Hz and 10 kHz

Mechanical Equivalence:

• Identical package type: Radial, Can - Screw Terminals
• Identical mounting type: Chassis Mount
• Identical physical dimensions: 2.598" diameter × 4.213" height
• Identical lead spacing: 1.122" (28.50 mm)

Compliance Equivalence:

• Both parts are RoHS3 compliant
• Both parts have MSL rating of 1 (Unlimited)
• Both parts are REACH Unaffected
• Both parts carry ECCN classification EAR99

The only differentiating factor is the series designation (ALS70 versus ALS71), which represents a product line evolution within KEMET's aluminum electrolytic capacitor portfolio while maintaining full parameter compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the ALS70H184MF040 and ALS71A184MF040 are Active products from KEMET with full RoHS3 compliance and REACH Unaffected status. Selection between these parts should be based on:

1. Inventory Availability: The ALS71A184MF040 currently has 978 units in stock compared to 756 units for the ALS70H184MF040. If supply chain continuity is a priority, the ALS71A variant provides greater immediate availability.

2. Series Designation: The ALS71 series represents a current product line offering from KEMET. The ALS70 series remains Active but may represent an earlier generation. For new designs, the ALS71A184MF040 is the preferred selection to ensure long-term product support.

3. Compliance Requirements: Both parts meet identical compliance standards (RoHS3, REACH Unaffected, EAR99 ECCN classification), making either suitable for regulated applications.

4. Mechanical Integration: Identical physical dimensions and lead spacing ensure direct mechanical substitution without PCB or chassis modifications.

5. Electrical Performance: Complete parameter equivalence across capacitance, voltage, ESR, ripple current, and thermal specifications ensures functional interchangeability in all circuit applications.

Frequently Asked Questions (FAQ)

Q: Can ALS71A184MF040 be used as a direct replacement for ALS70H184MF040?

A: Yes. The ALS71A184MF040 is a direct equivalent. All electrical parameters (capacitance, voltage, ESR, ripple current, lifetime) and mechanical specifications (dimensions, lead spacing, package type) are identical. No circuit modifications or board redesign is required.

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

A: No. Both parts use identical Radial, Can - Screw Terminal packaging with the same 1.122" (28.50 mm) lead spacing. Terminal compatibility is complete.

Q: What is the significance of the series designation change from ALS70 to ALS71?

A: The series designation indicates product line evolution within KEMET's aluminum electrolytic capacitor portfolio. Both series maintain the same electrical and mechanical specifications for this 180000 µF, 40 V rating. The ALS71 series represents the current product offering.

Q: Do both parts have the same thermal performance?

A: Yes. Both parts have identical lifetime specifications of 19000 hours at 85°C and the same operating temperature range of -40°C to 85°C. Thermal performance in circuit applications is equivalent.

Q: Are there any compliance or certification differences?

A: No. Both parts are RoHS3 compliant, REACH Unaffected, and carry the same EAR99 ECCN classification. Moisture sensitivity level is identical at MSL 1 (Unlimited) for both parts.

Q: Which part should be selected for new designs?

A: The ALS71A184MF040 is recommended for new designs as it represents the current active product line from KEMET. Both parts are Active status, but the ALS71 series provides assurance of continued long-term availability and support.

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

A: Yes. Both parts are rated for 27.4 A ripple current at 100 Hz and 29.2 A at 10 kHz, making them suitable for applications requiring sustained ripple current handling at low and high frequencies.