M39003/01-2991 Equivalent & Substitute Parts

Part Overview

The M39003/01-2991 is a 22 µF hermetically sealed tantalum capacitor rated at 15 V with axial through-hole mounting. Manufactured by Vishay Sprague under the military specification MIL-PRF-39003/1, this component is classified as Active product status. Substitute parts are identified when inventory constraints, lead time requirements, or procurement sourcing necessitate alternative qualified sources while maintaining electrical and mechanical compatibility within the specified parameter envelope.

Substiute Parts

M39003/01-2991

Vishay SpragueIn Stock: 773M39003/01-2991 Datasheet

Current PartRFQ

M39003/01-2271

KEMETIn Stock: 1325M39003/01-2271 Datasheet

DirectRFQ

M39003/01-2511

KEMETIn Stock: 1160M39003/01-2511 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for M39003/01-2991 is determined by strict equivalence across the following parameters:

• Capacitance: 22 µF (exact match required)
• Tolerance: ±10% (exact match required)
• Voltage Rating: 15 V (exact match required)
• Type: Hermetically Sealed (exact match required)
• Mounting: Through Hole Axial (exact match required)
• Temperature Range: -55°C ~ 125°C (exact match required)
• Military Specification Compliance: MIL-PRF-39003/1, CSR13 (exact match required)

Qualified substitute parts M39003/01-2271 and M39003/01-2511 meet all mandatory electrical and mechanical parameters. Both are manufactured by KEMET under the same military specification series and maintain identical capacitance, tolerance, voltage rating, hermetic sealing, axial package configuration, and operating temperature envelope.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain Active product status and are qualified under MIL-PRF-39003/1 military specification. Selection between M39003/01-2991, M39003/01-2271, and M39003/01-2511 is based on failure rate requirements and physical envelope constraints.

M39003/01-2991 exhibits the lowest failure rate at S (0.001%), suitable for applications requiring maximum reliability. M39003/01-2511 provides intermediate reliability at P (0.1%) failure rate. M39003/01-2271 operates at M (1%) failure rate.

Physical dimensions differ: M39003/01-2991 measures 0.185" Dia x 0.474" L, while both KEMET substitutes measure 0.185" Dia x 0.610" L. PCB layout and mechanical clearance must accommodate the longer axial length of KEMET parts. All parts share identical diameter and maintain the same manufacturer size code B classification.

Compliance status is uniform across all three parts: RoHS non-compliant and REACH Affected. No compliance advantage exists between options.

Frequently Asked Questions (FAQ)

Q: Can M39003/01-2271 or M39003/01-2511 be used as direct replacements for M39003/01-2991?

A: Both KEMET parts are electrically equivalent substitutes. All three parts share identical capacitance (22 µF), tolerance (±10%), voltage rating (15 V), hermetic sealing, axial through-hole mounting, and operating temperature range (-55°C ~ 125°C). Physical length differs: KEMET parts are 0.136" longer. PCB layout must accommodate this dimension difference.

Q: What is the difference between M39003/01-2271 and M39003/01-2511?

A: Both parts are manufactured by KEMET with identical electrical and mechanical specifications. The primary distinction is failure rate: M39003/01-2511 specifies P (0.1%) versus M39003/01-2271 at M (1%). Select M39003/01-2511 for applications requiring lower failure rate.

Q: Does the ESR difference affect substitution?

A: M39003/01-2991 does not specify ESR. Both KEMET substitutes specify 2 Ohm ESR. This parameter does not disqualify substitution but should be evaluated against circuit requirements for ripple current handling and thermal performance.

Q: Are there physical installation constraints?

A: Yes. M39003/01-2991 measures 0.474" axial length versus 0.610" for both KEMET substitutes. Verify PCB hole spacing, component clearance to adjacent parts, and mechanical mounting constraints before substitution. Diameter remains constant at 0.185" across all parts.

Q: What compliance considerations apply?

A: All three parts are RoHS non-compliant and REACH Affected. No compliance advantage exists between options. Military specification compliance (MIL-PRF-39003/1, CSR13) is maintained across all substitutes.