ECS-H1EC335R Equivalent & Substitute Parts

Part Overview

The ECS-H1EC335R is a 3.3 µF molded tantalum capacitor rated at 25 V, manufactured by Panasonic Electronic Components in the TEH series. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and production continuity. The 2312 (6032 Metric) package format and surface mount configuration are standard for this capacitance and voltage class, enabling direct substitution with compatible alternatives from active product lines.

Substiute Parts

ECS-H1EC335R

Panasonic Electronic ComponentsIn Stock: 784ECS-H1EC335R Datasheet

Current PartRFQ

F971V335MCC

KYOCERA AVXIn Stock: 25259F971V335MCC Datasheet

DirectRFQ

TAJC335M025RNJ

KYOCERA AVXIn Stock: 854TAJC335M025RNJ Datasheet

DirectRFQ

TAJC335K035RNJ

KYOCERA AVXIn Stock: 2118TAJC335K035RNJ Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ECS-H1EC335R are classified based on electrical and mechanical compatibility within the 3.3 µF tantalum capacitor category. The primary substitution criteria are:

Direct Substitutes maintain identical capacitance (3.3 µF), voltage rating (25 V), tolerance (±20%), package format (2312), and operating temperature range (-55°C ~ 125°C). These parts are pin-compatible and functionally equivalent for circuit applications designed for the original specification.

Similar Substitutes share the same capacitance, package, and operating temperature range but differ in voltage rating (35 V) or tolerance (±10%). These parts are mechanically compatible and electrically suitable for applications where the higher voltage rating or tighter tolerance provides additional design margin or performance benefits.

All substitute parts maintain the 2312 (6032 Metric) surface mount package, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Parameter Comparison

Engineering Selection Recommendations

TAJC335M025RNJ is the primary direct substitute for the ECS-H1EC335R. This part maintains identical electrical specifications (3.3 µF, ±20%, 25 V) and package format while offering active product status and ROHS3 compliance. The MSL rating of 1 (Unlimited) matches the original part, eliminating moisture sensitivity considerations during storage and assembly. This substitute is suitable for direct replacement in existing designs without circuit modification.

F971V335MCC provides a direct electrical substitute with enhanced voltage rating (35 V) and lower ESR (2 Ohm). The higher voltage rating offers additional design margin for applications subject to voltage transients or ripple. However, the MSL rating of 3 (168 Hours) requires controlled storage conditions and shorter shelf life management compared to the original specification. This part is suitable for applications where the higher voltage rating and lower ESR provide performance benefits that justify moisture sensitivity management.

TAJC335K035RNJ is a similar substitute offering tighter tolerance (±10%) and higher voltage rating (35 V) within the same package format. The ±10% tolerance provides improved capacitance accuracy for applications requiring tighter value control. The MSL rating of 1 (Unlimited) and ROHS3 compliance align with modern manufacturing standards. This part is suitable for applications where improved tolerance and voltage margin are required.

All substitute parts are ROHS3 compliant, addressing regulatory requirements for new designs and production environments.

Frequently Asked Questions (FAQ)

Q: Can TAJC335M025RNJ directly replace ECS-H1EC335R without circuit modification?

A: Yes. TAJC335M025RNJ maintains identical capacitance (3.3 µF), tolerance (±20%), voltage rating (25 V), and package format (2312). Both parts operate across -55°C ~ 125°C and are surface mount compatible. Direct substitution is electrically and mechanically valid.

Q: What is the difference between the direct and similar substitutes?

A: Direct substitutes (TAJC335M025RNJ, F971V335MCC) match the 25 V voltage rating of the original part. Similar substitutes (TAJC335K035RNJ) offer higher voltage rating (35 V) or tighter tolerance (±10%), providing additional design margin or improved accuracy at the cost of different electrical characteristics.

Q: Does the height difference between substitute parts affect PCB assembly?

A: The original part has a maximum seated height of 0.106" (2.70mm), while substitute parts are rated at 0.110" (2.80mm). This 0.004" (0.10mm) difference is within typical PCB design tolerances for surface mount components and does not affect assembly compatibility or board-level clearance for standard designs.

Q: What is the significance of MSL rating differences?

A: MSL 1 (Unlimited) indicates no moisture sensitivity restrictions during storage and handling. MSL 3 (168 Hours) requires controlled storage conditions and limits shelf life to 168 hours after moisture exposure. TAJC335M025RNJ and TAJC335K035RNJ maintain MSL 1 compatibility with the original part. F971V335MCC requires moisture sensitivity management during production.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts carry ROHS3 compliance certification. The original ECS-H1EC335R is RoHS non-compliant, making ROHS3-compliant substitutes necessary for new designs and production environments subject to RoHS regulations.

Q: What does ESR (Equivalent Series Resistance) indicate for these capacitors?

A: ESR is the internal resistance of the capacitor at operating frequency. Lower ESR values (F971V335MCC at 2 Ohm) indicate reduced power dissipation and improved high-frequency performance. The original part does not specify ESR. Substitute parts with specified ESR values provide measurable performance characteristics for circuit design and thermal analysis.