688LMB063M2EF Equivalent & Substitute Parts

Part Overview

The 688LMB063M2EF is a 6800 µF, 63 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor in the LMB series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring high capacitance values at moderate voltage ratings. The part is currently active in production with 1111 pieces available in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are required due to component availability, supply chain considerations, or design flexibility within the same functional category.

Substiute Parts

688LMB063M2EF

Cornell Dubilier / Illinois CapacitorIn Stock: 1131688LMB063M2EF Datasheet

Current PartRFQ

LGY1J682MELC40

NichiconIn Stock: 274101LGY1J682MELC40 Datasheet

UpgradeRFQ

381LX682M063A042

Cornell Dubilier Electronics (CDE)In Stock: 2199381LX682M063A042 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 688LMB063M2EF are qualified based on the following critical parameters that must remain constant across all equivalent options:

Mandatory Matching Parameters:

• Capacitance: 6800 µF
• Voltage Rating: 63 V
• Tolerance: ±20%
• Package Type: Radial, Can - Snap-In
• Lead Spacing: 0.394" (10.00mm)
• Case Diameter: 1.378" (35.00mm)
• Height (Seated Max): 1.654" (42.00mm)
• Mounting Type: Through Hole
• Operating Temperature Range: -40°C to 105°C
• Polarization: Polar
• RoHS Compliance: ROHS3 Compliant

Variable Parameters Permitted in Substitutes:

• Manufacturer and series designation
• Lifetime rating at 105°C
• ESR (Equivalent Series Resistance) values
• Ripple current specifications
• Packaging format (Bulk vs. other)
• Moisture Sensitivity Level

All identified substitute parts meet the mandatory parameter requirements and are therefore electrically and mechanically interchangeable with the 688LMB063M2EF in through-hole PCB applications.

Parameter Comparison

Engineering Selection Recommendations

688LMB063M2EF (Primary Part - Cornell Dubilier / Illinois Capacitor)

This is the original specified component. It is active in production with established supply availability (1111 pieces in stock). The part carries ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The ESR specification of 73.14 mOhm at 120 Hz is documented, providing precise electrical characterization for circuit design. The 3000-hour lifetime at 105°C is suitable for general-purpose applications with standard thermal cycling expectations.

LGY1J682MELC40 (Upgrade Substitute - Nichicon)

This Nichicon part is an upgrade option offering extended lifetime performance with 5000 hours at 105°C, compared to the 3000-hour rating of the primary part. All mechanical and electrical parameters match the 688LMB063M2EF exactly. The part is ROHS3 compliant and REACH unaffected. Inventory availability is significantly higher (274,082 pieces in stock), providing supply chain flexibility. This substitute is suitable for applications where extended operational life at elevated temperatures is beneficial.

381LX682M063A042 (Parametric Equivalent - Cornell Dubilier Electronics)

This Cornell Dubilier Electronics part provides a direct parametric equivalent within the same manufacturer family. It matches all critical electrical and mechanical specifications of the 688LMB063M2EF, including the 3000-hour lifetime at 105°C. ROHS3 compliance and REACH unaffected status are maintained. Inventory is available (2,132 pieces in stock). This substitute is appropriate for applications requiring continuity within the Cornell Dubilier product ecosystem or when the 381LX series is preferred for design standardization.

All three parts are active products with current regulatory compliance and are electrically and mechanically interchangeable for through-hole PCB mounting applications.

Frequently Asked Questions (FAQ)

Q: Can the LGY1J682MELC40 be used as a direct replacement for the 688LMB063M2EF?

A: Yes. The LGY1J682MELC40 meets all mandatory electrical and mechanical parameters required for direct substitution. Both parts have identical capacitance (6800 µF), voltage rating (63 V), tolerance (±20%), package type (Radial, Can - Snap-In), lead spacing (10.00mm), case diameter (35.00mm), height (42.00mm), and operating temperature range (-40°C to 105°C). The parts are pin-compatible and require no circuit modifications.

Q: What is the difference between the 688LMB063M2EF and the LGY1J682MELC40?

A: The primary difference is the lifetime rating at 105°C. The 688LMB063M2EF is rated for 3000 hours, while the LGY1J682MELC40 is rated for 5000 hours. The Nichicon part also has different ripple current specifications at high frequencies. Both parts are ROHS3 compliant and REACH unaffected. The choice between them depends on application requirements for thermal endurance and ripple current handling.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The 688LMB063M2EF, LGY1J682MELC40, and 381LX682M063A042 are all ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic components.

Q: Can these capacitors be used in surface-mount applications?

A: No. All three parts are through-hole mounted components with radial leads and snap-in can packaging. They are not suitable for surface-mount PCB assembly. The lead spacing of 0.394" (10.00mm) and case diameter of 1.378" (35.00mm) are designed for through-hole insertion only.

Q: What is the significance of the ESR specification?

A: ESR (Equivalent Series Resistance) affects the capacitor's ability to handle ripple current and its performance in high-frequency applications. The 688LMB063M2EF specifies 73.14 mOhm at 120 Hz. The substitute parts do not provide ESR values in their specifications. If ESR is a critical design parameter, the 688LMB063M2EF should be retained as the primary choice.

Q: Which substitute part should be selected for maximum operational life?

A: The LGY1J682MELC40 offers the longest lifetime rating at 5000 hours at 105°C, compared to 3000 hours for both the 688LMB063M2EF and 381LX682M063A042. This makes the Nichicon part suitable for applications requiring extended thermal endurance.

Q: Are there any inventory considerations when selecting a substitute?

A: Yes. The 688LMB063M2EF has 1,111 pieces in stock, the 381LX682M063A042 has 2,132 pieces, and the LGY1J682MELC40 has 274,082 pieces available. The Nichicon part offers significantly higher inventory availability for applications requiring large quantities or rapid procurement.

Q: Can these capacitors be used interchangeably in existing designs without PCB modification?

A: Yes. All three parts have identical lead spacing (10.00mm), case diameter (35.00mm), and height (42.00mm). They use the same snap-in can package with through-hole radial leads. No PCB layout changes are required for substitution.