M39003/01-2739 Equivalent & Substitute Parts

Part Overview

The M39003/01-2739 is a 39 µF hermetically sealed tantalum capacitor rated at 10 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 to address inventory availability, lead time constraints, or specific application requirements while maintaining electrical and mechanical compatibility within the defined parameter tolerances.

Substiute Parts

M39003/01-2739

Vishay SpragueIn Stock: 1207M39003/01-2739 Datasheet

Current PartRFQ

M39003/01-2259

KEMETIn Stock: 1279M39003/01-2259 Datasheet

DirectRFQ

T322D396K010AT

KEMETIn Stock: 1250T322D396K010AT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts are grouped based on strict electrical parameter equivalence: capacitance value (39 µF), voltage rating (10 V), tolerance (±10%), and mounting configuration (through-hole axial). All identified substitutes maintain these core electrical specifications. Physical dimensions may vary within acceptable tolerances for axial through-hole components. Type variations (hermetically sealed versus molded) are permitted when electrical performance and reliability ratings remain compatible with the application requirements. Compliance status and failure rate classifications are documented to support engineering selection based on specific project constraints.

Parameter Comparison

Engineering Selection Recommendations

M39003/01-2259 (KEMET) serves as a direct military-specification equivalent, maintaining MIL-PRF-39003/1 certification and hermetically sealed construction. This substitute is suitable for applications requiring strict military compliance and equivalent failure rate classification within the CSR13 series.

T322D396K010AT (KEMET) provides electrical equivalence with improved compliance status: ROHS3 compliant and REACH unaffected. Physical dimensions are more compact (0.180" Dia x 0.420" L versus 0.185" Dia x 0.474" L). This substitute is appropriate for applications where RoHS compliance and reduced environmental regulatory burden are required, provided PCB layout accommodates the dimensional variation and molded construction is acceptable for the application environment.

Selection between substitutes depends on regulatory requirements: military specification compliance favors M39003/01-2259; RoHS and REACH compliance favors T322D396K010AT.

Frequently Asked Questions (FAQ)

Q: Can M39003/01-2259 replace M39003/01-2739 in all applications? A: Yes, within electrical and mechanical parameters. Both are 39 µF, 10 V, ±10% tolerance, through-hole axial tantalum capacitors rated -55°C to 125°C. M39003/01-2259 is slightly longer (0.610" L versus 0.474" L); verify PCB layout clearance. M39003/01-2259 has higher failure rate (M, 1% versus R, 0.01%), which may impact reliability-critical applications.

Q: Is T322D396K010AT compatible with the original M39003/01-2739? A: Electrical compatibility is confirmed: 39 µF, 10 V, ±10% tolerance, -55°C to 125°C operating range. Physical dimensions differ (0.180" Dia x 0.420" L versus 0.185" Dia x 0.474" L); verify PCB footprint accommodation. Type difference (molded versus hermetically sealed) may affect moisture resistance and long-term reliability in high-humidity environments. T322D396K010AT offers RoHS3 compliance and REACH unaffected status.

Q: What are the key differences between hermetically sealed and molded tantalum capacitors? A: Hermetically sealed construction provides superior moisture barrier and long-term stability in harsh environments. Molded construction is more compact and typically offers better RoHS/REACH compliance. Selection depends on application environment and regulatory requirements.

Q: Can physical dimension differences affect circuit performance? A: Dimension variations do not affect electrical performance if PCB layout accommodates the component size. Verify lead spacing and mounting hole alignment. Compact designs (T322D396K010AT) may offer space advantages; longer designs (M39003/01-2259) require additional clearance.

Q: What does failure rate classification mean? A: Failure rate R (0.01%) indicates lower expected failure rate than M (1%). For mission-critical applications, lower failure rate classifications are preferred. Verify application reliability requirements before selecting substitutes with different failure rate classifications.