SEK682M016ST Equivalent & Substitute Parts

Part Overview

The SEK682M016ST is a 6800 µF, 16 V aluminum electrolytic capacitor manufactured by Cornell Dubilier Electronics (CDE) in a radial, through-hole configuration. This capacitor is rated for general-purpose applications with a 2000-hour lifetime at 105°C and an equivalent series resistance (ESR) of 60 mOhm @ 120 Hz. The part is currently Active in product status and ROHS3 compliant.

Substitute parts become necessary when the primary manufacturer discontinues production, inventory becomes unavailable, or design requirements necessitate alternative performance characteristics such as extended operational lifetime or improved ripple current handling capabilities.

Substiute Parts

SEK682M016ST

Cornell Dubilier Electronics (CDE)In Stock: 1001SEK682M016ST Datasheet

Current PartRFQ

UPW1C682MHD

NichiconIn Stock: 5603UPW1C682MHD Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SEK682M016ST is determined by strict equivalence across the following parameters:

Mandatory Matching Parameters:

• Capacitance: 6800 µF (exact match required)
• Voltage Rating: 16 V (exact match required)
• Tolerance: ±20% (exact match required)
• Package Type: Radial, Can (exact match required)
• Mounting Type: Through Hole (exact match required)
• Lead Spacing: 0.295" (7.50 mm) (exact match required)
• Physical Dimensions: 0.709" Dia × 1.417" Height maximum (exact match required)
• Polarization: Polar (exact match required)
• Operating Temperature Range: -55°C to 105°C (exact match required)
• RoHS Compliance: ROHS3 Compliant (exact match required)

Performance Parameters (May Vary):

• ESR (Equivalent Series Resistance)
• Lifetime @ Temperature
• Ripple Current Ratings
• Impedance

The substitute part UPW1C682MHD from Nichicon meets all mandatory matching parameters and is therefore electrically and mechanically interchangeable with the SEK682M016ST.

Parameter Comparison

Engineering Selection Recommendations

SEK682M016ST (Primary Selection): The SEK682M016ST is the recommended primary selection for new designs. This part carries Active product status from Cornell Dubilier Electronics, indicating ongoing manufacturing support and availability. It is ROHS3 compliant and suitable for general-purpose applications requiring a 6800 µF, 16 V aluminum electrolytic capacitor in a through-hole radial configuration.

UPW1C682MHD (Substitute Selection): The UPW1C682MHD from Nichicon is a direct electrical and mechanical substitute for the SEK682M016ST. This part meets all mandatory parameter requirements for interchangeability. However, the UPW1C682MHD carries a "Not For New Designs" product status, indicating that Nichicon does not recommend this part for new design implementations. The substitute is suitable for replacement, repair, or legacy system applications where the SEK682M016ST is unavailable.

The UPW1C682MHD offers enhanced performance characteristics compared to the primary part, including a 4× longer operational lifetime (8000 hours versus 2000 hours at 105°C) and higher ripple current ratings. These performance improvements do not affect substitution compatibility but may provide operational advantages in applications where thermal stress or ripple current is a design consideration.

Both parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can the UPW1C682MHD be used as a direct replacement for the SEK682M016ST?

A: Yes. The UPW1C682MHD is electrically and mechanically interchangeable with the SEK682M016ST. Both parts share identical capacitance (6800 µF), voltage rating (16 V), tolerance (±20%), package type (radial, can), mounting type (through hole), lead spacing (0.295"), and physical dimensions. Both operate across the same temperature range (-55°C to 105°C) and meet ROHS3 compliance requirements.

Q: What is the difference in physical dimensions between these parts?

A: The maximum seated height differs slightly. The SEK682M016ST has a maximum height of 1.417" (36.00 mm), while the UPW1C682MHD has a maximum height of 1.398" (35.50 mm). This 0.019" (0.50 mm) difference is within typical PCB layout tolerances and does not affect mechanical interchangeability in standard through-hole applications.

Q: Why does the UPW1C682MHD have a "Not For New Designs" status?

A: The "Not For New Designs" designation indicates that Nichicon has classified this part as legacy or end-of-life from a design recommendation perspective. This status does not affect the part's functionality or suitability for replacement applications. For new designs, the SEK682M016ST (Active status) is the recommended selection.

Q: How do the performance characteristics differ between these parts?

A: The UPW1C682MHD provides superior performance in two areas: operational lifetime and ripple current handling. The UPW1C682MHD is rated for 8000 hours at 105°C compared to 2000 hours for the SEK682M016ST. Additionally, the UPW1C682MHD supports higher ripple currents (3.128 A @ 120 Hz and 3.68 A @ 100 kHz) versus the SEK682M016ST (1.79 A @ 120 Hz and 2.148 A @ 10 kHz). These differences do not affect electrical interchangeability but indicate enhanced thermal and current handling capabilities.

Q: Are both parts RoHS compliant?

A: Yes. Both the SEK682M016ST and UPW1C682MHD are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components.

Q: What applications are these capacitors suitable for?

A: Both parts are rated for general-purpose applications. The 6800 µF capacitance at 16 V makes these capacitors suitable for power supply filtering, energy storage, and signal coupling applications in consumer and industrial electronics.