ALS70U103NP350 Equivalent & Substitute Parts

Part Overview

The ALS70U103NP350 is a 10000 µF, 350 V aluminum electrolytic capacitor manufactured by KEMET in the ALS70 series. This component features screw terminals for chassis mount applications and is designed for general-purpose use in high-voltage circuits requiring large capacitance values. The part is currently Active in product status with 759 units in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part number becomes unavailable or when design requirements permit functional alternatives within specified electrical and mechanical parameters.

Substiute Parts

ALS70U103NP350

KEMETIn Stock: 786ALS70U103NP350 Datasheet

Current PartRFQ

ALS70A103NP350

KEMETIn Stock: 1101ALS70A103NP350 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ALS70U103NP350 are identified based on strict equivalence across all critical electrical and mechanical parameters. The substitution logic is based on the following criteria:

Electrical Parameters (Must Match Exactly):

• Capacitance: 10000 µF
• Voltage Rating: 350 V
• Tolerance: ±20%
• ESR @ 100Hz: 24 mOhm
• Lifetime @ 85°C: 20000 Hrs
• Operating Temperature Range: -40°C ~ 85°C
• Ripple Current @ 100 Hz: 19.1 A
• Ripple Current @ 10 kHz: 26.2 A
• Impedance: 16 mOhms

Mechanical Parameters (Must Match Exactly):

• Package / Case: Radial, Can - Screw Terminals
• Mounting Type: Chassis Mount
• Lead Spacing: 1.252" (31.80mm)
• Size / Dimension: 3.031" Dia (77.00mm)
• Height - Seated (Max): 5.827" (148.00mm)

Compliance Parameters (Must Match Exactly):

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

The ALS70A103NP350 meets all specified criteria and is classified as a parametric equivalent within the ALS70 series.

Parameter Comparison

Engineering Selection Recommendations

Both the ALS70U103NP350 and ALS70A103NP350 are Active products manufactured by KEMET and maintain full compliance with ROHS3 and REACH requirements. The parts are electrically and mechanically identical across all specified parameters, including capacitance, voltage rating, ESR, ripple current ratings, impedance, and physical dimensions.

Selection between these parts should be based on:

1. Inventory Availability: The ALS70A103NP350 currently has 1049 units in stock compared to 759 units for the ALS70U103NP350, providing greater supply chain flexibility.

2. Product Status: Both parts maintain Active status, ensuring continued manufacturer support and availability.

3. Compliance Certification: Both parts are ROHS3 Compliant and REACH Unaffected, meeting regulatory requirements for industrial and commercial applications.

4. Functional Equivalence: Complete parameter matching ensures direct substitution without circuit redesign or performance degradation.

Frequently Asked Questions (FAQ)

Q: Can ALS70A103NP350 be used as a direct replacement for ALS70U103NP350?

A: Yes. The ALS70A103NP350 is a parametric equivalent with identical electrical specifications (10000 µF, 350 V, 24 mOhm ESR @ 100Hz, 20000 Hrs @ 85°C), identical mechanical dimensions (3.031" Dia, 5.827" Height, 1.252" lead spacing), and identical package configuration (Radial, Can - Screw Terminals). No circuit modifications are required.

Q: Are there any differences in the physical footprint between these parts?

A: No. Both parts have identical dimensions: 3.031" diameter, 5.827" maximum seated height, and 1.252" lead spacing. Both use screw terminal connections and are designed for chassis mount applications.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both ALS70U103NP350 and ALS70A103NP350 are ROHS3 Compliant and REACH Unaffected. Both have Moisture Sensitivity Level 1 (Unlimited).

Q: What is the difference between the part numbers ALS70U and ALS70A?

A: The base product numbers ALS70U and ALS70A represent different internal designations within the KEMET ALS70 series. However, for the 10000 µF, 350 V configuration (103NP350), all electrical and mechanical parameters are identical, making them functionally equivalent.

Q: Which part should I select for new designs?

A: Either part is suitable for new designs. Selection should be based on current inventory availability and procurement lead times. The ALS70A103NP350 currently has higher stock levels (1049 units vs. 759 units).

Q: Are the ripple current ratings identical?

A: Yes. Both parts have identical ripple current specifications: 19.1 A @ 100 Hz and 26.2 A @ 10 kHz.

Q: Can these parts be used interchangeably in existing assemblies?

A: Yes. The identical electrical performance, ESR characteristics, impedance, and physical dimensions ensure interchangeable performance in existing circuit designs without modification.