ALS71U183NF200 Equivalent & Substitute Parts

Part Overview

The ALS71U183NF200 is an 18000 µF, 200 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 and voltage ratings. The part maintains an active product status with 1051 units in current inventory. Equivalent substitute parts are identified to support procurement flexibility, supply chain continuity, and design standardization across manufacturing environments.

Substiute Parts

ALS71U183NF200

KEMETIn Stock: 1108ALS71U183NF200 Datasheet

Current PartRFQ

ALS71A183NF200

KEMETIn Stock: 952ALS71A183NF200 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ALS71U183NF200 are identified based on strict parametric equivalence within the aluminum electrolytic capacitor category. The substitution logic is governed by the following critical parameters:

Electrical Parameters (Must Match):

• Capacitance: 18000 µF
• Voltage Rating: 200 V
• Tolerance: ±20%
• ESR @ 100Hz: 24 mOhm
• Lifetime @ 85°C: 20000 Hrs
• Operating Temperature Range: -40°C ~ 85°C
• Ripple Current @ 100 Hz: 18.8 A
• Ripple Current @ 10 kHz: 23 A

Mechanical Parameters (Must Match):

• Package Type: Radial, Can - Screw Terminals
• Mounting Type: Chassis Mount
• Lead Spacing: 1.252" (31.80mm)
• Diameter: 3.031" (77.00mm)
• Height - Seated (Max): 4.213" (107.00mm)

Compliance Parameters (Must Match):

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

The ALS71U183NF200 belongs to the ALS71 series. Substitute parts within this series maintain identical electrical performance, mechanical compatibility, and regulatory compliance, ensuring direct interchangeability in circuit designs and PCB layouts.

Parameter Comparison

Engineering Selection Recommendations

Both the ALS71U183NF200 and ALS71A183NF200 are active products manufactured by KEMET with full ROHS3 compliance and REACH unaffected status. The parts are electrically and mechanically identical across all specified parameters. Selection between these two part numbers should be based on:

Inventory Availability: The ALS71U183NF200 maintains higher current stock (1051 units) compared to the ALS71A183NF200 (896 units). For applications requiring immediate procurement, the ALS71U183NF200 offers superior availability.

Regulatory Compliance: Both parts meet identical compliance requirements (ROHS3, REACH Unaffected, MSL 1). No compliance-based differentiation exists between the two options.

Circuit Performance: Electrical performance is identical across all measured parameters including capacitance, voltage rating, ESR, ripple current handling, and thermal lifetime. No performance-based selection criteria apply.

Mechanical Integration: Both parts feature identical mechanical specifications, lead spacing, and mounting configuration, ensuring direct PCB layout compatibility without redesign.

Frequently Asked Questions (FAQ)

Q: Can ALS71A183NF200 be used as a direct replacement for ALS71U183NF200?

A: Yes. The ALS71A183NF200 is a parametric equivalent with identical electrical specifications (18000 µF, 200 V, 24 mOhm ESR @ 100Hz, 20000 Hrs @ 85°C), mechanical dimensions (3.031" diameter, 4.213" height, 1.252" lead spacing), and package configuration (Radial, Can - Screw Terminals). Direct substitution is supported without circuit modification.

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

A: No. Both parts use identical Radial, Can - Screw Terminals with matching lead spacing of 1.252" (31.80mm). Mounting compatibility is complete.

Q: What is the difference between the ALS71U and ALS71A base product numbers?

A: The base product numbers (ALS71U versus ALS71A) represent different internal KEMET product designations within the ALS71 series. However, the complete part numbers ALS71U183NF200 and ALS71A183NF200 specify identical electrical and mechanical parameters, making them functionally equivalent for engineering purposes.

Q: Do both parts have the same thermal lifetime rating?

A: Yes. Both parts are rated for 20000 hours of operation at 85°C, ensuring equivalent reliability and service life in thermal stress conditions.

Q: Are both parts RoHS3 compliant?

A: Yes. Both ALS71U183NF200 and ALS71A183NF200 are ROHS3 compliant with Moisture Sensitivity Level 1 (Unlimited), meeting identical regulatory requirements for environmental and hazardous substance restrictions.

Q: Which part should be selected for new designs?

A: Both parts are active products suitable for new designs. Selection should be based on current inventory availability and procurement lead times. The ALS71U183NF200 currently maintains higher stock levels (1051 units).

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

A: Yes. Both parts support ripple current handling of 18.8 A @ 100 Hz and 23 A @ 10 kHz, with ESR of 24 mOhm @ 100Hz, making them suitable for applications requiring significant AC current handling.