SEK331M035ST Equivalent & Substitute Parts Reference

Part Overview

The SEK331M035ST is a 330 µF, 35 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in radial, through-hole configuration. This component is classified as Active product status and is designed for general-purpose applications requiring reliable energy storage and filtering in electronic circuits. The part operates across a temperature range of -55°C to 105°C with a rated lifetime of 2000 hours at 105°C.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained, ensuring functional interchangeability in circuit applications without performance degradation.

Substiute Parts

SEK331M035ST

Cornell Dubilier Electronics (CDE)In Stock: 1135SEK331M035ST Datasheet

Current PartRFQ

ECA-1VHG331

Panasonic Electronic ComponentsIn Stock: 22238ECA-1VHG331 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SEK331M035ST is determined by strict equivalence across the following parameters:

Electrical Parameters (Non-Negotiable):

• Capacitance value: 330 µF (exact match required)
• Voltage rating: 35 V (minimum requirement)
• Tolerance: ±20% (circuit design dependent)
• Operating temperature range: -55°C to 105°C (minimum coverage required)
• Lifetime rating: 2000 Hrs @ 105°C (reliability specification)

Mechanical Parameters (Non-Negotiable):

• Lead spacing: 5.00 mm (PCB hole pattern compatibility)
• Diameter: 10.00 mm (physical envelope)
• Mounting type: Through Hole (assembly process compatibility)
• Package type: Radial, Can (form factor)

Compliance Parameters:

• RoHS3 Compliant status (regulatory requirement)

The substitute part ECA-1VHG331 meets all critical electrical and mechanical parameters, confirming functional interchangeability.

Parameter Comparison

Engineering Selection Recommendations

Primary Part: SEK331M035ST

• Active product status with established supply chain
• ROHS3 compliant for regulatory requirements
• Specified ESR of 560 mOhm provides known circuit performance characteristics
• 1095 units in current inventory

Substitute Part: ECA-1VHG331

• Active product status with established supply chain
• ROHS3 compliant for regulatory requirements
• All critical electrical parameters match SEK331M035ST
• All critical mechanical parameters match SEK331M035ST
• Height dimension is 2.50 mm shorter (13.50 mm vs. 16.00 mm), providing additional PCB clearance
• 22199 units in current inventory, indicating strong availability
• Panasonic NHG-A series provides alternative sourcing option

Both parts satisfy the substitution criteria based on provided specifications. Selection between them should be based on supply chain requirements, inventory availability, and cost considerations.

Frequently Asked Questions (FAQ)

Q: Can ECA-1VHG331 be used as a direct replacement for SEK331M035ST?

A: Yes. Both parts share identical capacitance (330 µF), voltage rating (35 V), tolerance (±20%), operating temperature range (-55°C to 105°C), lifetime rating (2000 Hrs @ 105°C), lead spacing (5.00 mm), diameter (10.00 mm), and mounting type (Through Hole, Radial, Can). All critical electrical and mechanical parameters match exactly.

Q: What is the significance of the height difference between these parts?

A: The ECA-1VHG331 has a maximum seated height of 13.50 mm compared to 16.00 mm for the SEK331M035ST. This 2.50 mm difference may provide additional clearance in space-constrained PCB layouts. Verify that your circuit board design accommodates the original height specification before substituting with the shorter component.

Q: Are both parts RoHS compliant?

A: Yes. Both SEK331M035ST and ECA-1VHG331 are ROHS3 compliant, meeting current regulatory requirements for electronic component manufacturing and use.

Q: What parameters must remain identical for substitution to be valid?

A: Capacitance value, voltage rating, tolerance, operating temperature range, lead spacing, diameter, mounting type, and package configuration must all match or be compatible. These parameters determine circuit functionality and PCB assembly compatibility.

Q: Is ESR (Equivalent Series Resistance) a factor in substitution?

A: ESR affects circuit performance characteristics such as ripple current handling and transient response. The SEK331M035ST specifies 560 mOhm ESR. The ECA-1VHG331 does not provide ESR specification in the available data. If ESR is a critical design parameter, verify the substitute part's ESR value before implementation.

Q: Can I use these parts interchangeably in all applications?

A: Both parts are rated for general-purpose applications and meet identical electrical specifications. However, application-specific requirements such as ripple current handling, frequency response, or thermal management should be evaluated. The ECA-1VHG331 specifies ripple current ratings (350 mA @ 120 Hz, 525 mA @ 100 kHz), which may be relevant for high-frequency or high-current applications.