688LBA050M2DD Equivalent & Substitute Parts

Part Overview

The 688LBA050M2DD is a 6800 µF, 50 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor. 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 724 units in stock.

Equivalent and substitute parts are identified when alternative manufacturers offer capacitors with matching electrical specifications and mechanical form factors, enabling direct replacement in circuit designs without functional compromise.

Substiute Parts

688LBA050M2DD

Cornell Dubilier / Illinois CapacitorIn Stock: 782688LBA050M2DD Datasheet

Current PartRFQ

ELH688M050AS2AA

KEMETIn Stock: 4115ELH688M050AS2AA Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 688LBA050M2DD is determined by strict equivalence across the following critical parameters:

Electrical Parameters:

• Capacitance value: 6800 µF (exact match required)
• Tolerance: ±20% (matching tolerance band)
• Voltage rating: 50 V (minimum rated voltage must equal or exceed)
• Lifetime specification: 2000 Hrs @ 85°C (operational life under thermal stress)
• Operating temperature range: -40°C ~ 85°C (full temperature envelope)

Mechanical Parameters:

• Lead spacing: 0.394" (10.00mm) (PCB hole pattern compatibility)
• Diameter: 1.181" (30.00mm) (physical envelope)
• Height: 1.260" (32.00mm) (clearance and mounting height)
• Package type: Radial, Can - Snap-In (form factor and connection method)
• Mounting type: Through Hole (board assembly method)

Compliance Parameters:

• RoHS3 Compliant status
• Polarization: Polar (electrical polarity requirement)

The substitute part ELH688M050AS2AA from KEMET meets all specified criteria for direct replacement.

Parameter Comparison

Engineering Selection Recommendations

Both the 688LBA050M2DD and ELH688M050AS2AA are active production parts with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component manufacturing and use.

The ELH688M050AS2AA offers higher inventory availability (4099 units in stock versus 724 units), which may be relevant for supply chain planning and lead time considerations. Both parts share identical electrical ratings, mechanical dimensions, and thermal specifications, confirming direct interchangeability in circuit applications.

Selection between these parts should be based on procurement availability, cost factors, and established supplier relationships, as both meet all specified technical requirements for the 6800 µF, 50 V aluminum electrolytic capacitor application.

Frequently Asked Questions (FAQ)

Q: Can the ELH688M050AS2AA replace the 688LBA050M2DD in existing designs?

A: Yes. Both capacitors share identical capacitance (6800 µF), voltage rating (50 V), tolerance (±20%), thermal lifetime (2000 Hrs @ 85°C), operating temperature range (-40°C ~ 85°C), and mechanical dimensions (1.181" diameter, 1.260" height, 0.394" lead spacing). The radial, can-style snap-in package and through-hole mounting are identical, enabling direct PCB substitution.

Q: Are there differences in ripple current handling between these parts?

A: Ripple current specifications differ slightly. The 688LBA050M2DD specifies 3.69 A @ 120 Hz and 4.6125 A @ 10 kHz. The ELH688M050AS2AA specifies 3.8 A @ 120 Hz and 4.408 A @ 10 kHz. Both values remain within acceptable operating ranges for general-purpose applications. Circuit designs should verify ripple current requirements against both specifications.

Q: Do both parts meet current regulatory compliance?

A: Yes. Both the 688LBA050M2DD and ELH688M050AS2AA are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards for electronic component use.

Q: What is the significance of the snap-in package style?

A: The snap-in package indicates a mechanical connection method where the capacitor leads engage with spring-loaded contacts on the PCB or connector, rather than traditional solder connections. This package style is common in power supply and industrial applications. Both substitute parts use identical snap-in mechanisms, ensuring mechanical compatibility.

Q: Are there any temperature or environmental differences between these capacitors?

A: No. Both parts operate across the identical temperature range (-40°C ~ 85°C) and share the same thermal lifetime rating (2000 Hrs @ 85°C). Environmental compliance (RoHS3, REACH) is equivalent for both parts.