M39003/01-3021 Equivalent & Substitute Parts

Part Overview

The M39003/01-3021 is a 100 µF hermetically sealed tantalum capacitor rated at 20 V, manufactured by Vishay Sprague to military specification MIL-PRF-39003/1. This component is designed for high-reliability applications requiring axial through-hole mounting. The part is currently active in production with 898 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are required due to inventory constraints, procurement lead times, or design flexibility needs.

Substiute Parts

M39003/01-3021

Vishay SpragueIn Stock: 959M39003/01-3021 Datasheet

Current PartRFQ

M39003/01-2301

KEMETIn Stock: 1287M39003/01-2301 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the M39003/01-3021 is permissible when the replacement part maintains the following critical parameters:

• Capacitance value: 100 µF
• Tolerance: ±10%
• Voltage rating: 20 V (minimum)
• Type: Hermetically sealed tantalum
• Mounting: Through-hole axial configuration
• Military specification compliance: MIL-PRF-39003/1
• Operating temperature range: -55°C ~ 125°C

The M39003/01-2301 manufactured by KEMET satisfies all substitution criteria. Both parts conform to the same military standard and share identical electrical ratings. Physical dimensions differ slightly in length (0.786" vs. 0.922"), which remains within acceptable tolerance for axial component placement in standard PCB layouts. ESR specification is provided for the substitute part (600 mOhm) but not for the primary part, indicating enhanced electrical characterization data availability.

Parameter Comparison

Engineering Selection Recommendations

Both the M39003/01-3021 and M39003/01-2301 are active production parts certified to MIL-PRF-39003/1 and are RoHS non-compliant with REACH affected status. Selection between these parts should be based on the following factors:

The M39003/01-3021 (Vishay Sprague) offers a superior failure rate specification of S (0.001%), making it the preferred choice for applications with the most stringent reliability requirements. The M39003/01-2301 (KEMET) provides an alternative with a failure rate of M (1%) and documented ESR performance of 600 mOhm, suitable for applications where this electrical characterization is beneficial. The 0.136" length difference (0.922" vs. 0.786") must be verified against PCB layout constraints and mechanical clearance requirements before substitution.

Frequently Asked Questions (FAQ)

Q: Can M39003/01-2301 be used as a direct replacement for M39003/01-3021?

A: Yes, provided that PCB layout accommodates the increased axial length of 0.922" compared to 0.786". Both parts meet identical electrical specifications and military certification requirements.

Q: What is the significance of the different failure rates (S vs. M)?

A: Failure rate S (0.001%) indicates a lower defect rate per 1,000 hours of operation compared to failure rate M (1%). Selection depends on application reliability requirements and acceptable risk thresholds.

Q: Does the ESR specification difference affect substitution eligibility?

A: The M39003/01-2301 provides documented ESR of 600 mOhm. The M39003/01-3021 does not specify ESR in available data. Both parts meet the same voltage and capacitance requirements. ESR becomes a selection factor only if circuit design requires specific impedance characteristics at operating frequencies.

Q: Are there packaging considerations for these parts?

A: The M39003/01-3021 is supplied in bulk packaging, while the M39003/01-2301 is supplied in tray packaging. This affects handling, storage, and assembly processes but does not impact electrical or mechanical compatibility.

Q: Do both parts comply with the same regulatory standards?

A: Yes. Both parts are RoHS non-compliant and REACH affected, with identical ECCN (EAR99) and HTSUS (8532.21.0020) classifications.