Equivalent & Substitute Parts for 688LBB035M2DC

Part Overview

The 688LBB035M2DC is a 6800 µF, 35 V aluminum electrolytic capacitor manufactured by Cornell Dubilier / Illinois Capacitor in the LBB series. This radial, can-style snap-in capacitor is designed for general-purpose applications requiring high capacitance at moderate voltage ratings. The part is currently active in production with 1118 units in stock. Substitute parts are identified to provide alternatives for procurement flexibility, extended thermal performance, or inventory availability.

Key Parameters

Parameter	Value	Unit
Capacitance	6800	µF
Voltage - Rated	35	V
Tolerance	±20%	-
Operating Temperature Range	-40°C ~ 85°C	-
Lifetime @ Temperature	3000 Hrs @ 85°C	-
Lead Spacing	0.394" (10.00 mm)	-
Package / Case	Radial, Can - Snap-In	-
Mounting Type	Through Hole	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the 688LBB035M2DC is determined by the following critical parameters:

Mandatory Matching Parameters:

Capacitance: 6800 µF (exact match required)
Voltage Rating: 35 V (exact match required)
Tolerance: ±20% (exact match required)
Package / Case: Radial, Can - Snap-In (exact match required)
Lead Spacing: 0.394" (10.00 mm) (exact match required)
Mounting Type: Through Hole (exact match required)
Polarization: Polar (exact match required)

Allowable Variation Parameters:

Operating Temperature Range: May extend beyond -40°C ~ 85°C
Lifetime @ Temperature: May exceed 3000 Hrs @ 85°C
ESR (Equivalent Series Resistance): May vary within acceptable limits for the application
Ripple Current: May vary within acceptable limits for the application
Height - Seated: Minor variations permitted if within mechanical envelope constraints

All identified substitute parts meet the mandatory matching criteria. Variations in thermal performance and ESR represent upgrades or alternative specifications within the same functional category.

Parameter Comparison

Parameter	688LBB035M2DC (Cornell Dubilier)	SLPX682M035E1P3 (CDE)	LGU1V682MELB (Nichicon)	LGY1V682MELB25 (Nichicon)
Capacitance	6800 µF	6800 µF	6800 µF	6800 µF
Voltage - Rated	35 V	35 V	35 V	35 V
Tolerance	±20%	±20%	±20%	±20%
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 105°C
Lifetime @ Temperature	3000 Hrs @ 85°C	3000 Hrs @ 85°C	3000 Hrs @ 105°C	5000 Hrs @ 105°C
ESR @ 120Hz	60.9509 mOhm	78 mOhm	Not Specified	Not Specified
Lead Spacing	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)	0.394" (10.00 mm)
Size / Dimension	1.181" Dia (30.00 mm)	1.181" Dia (30.00 mm)	1.181" Dia (30.00 mm)	1.181" Dia (30.00 mm)
Height - Seated (Max)	1.063" (27.00 mm)	0.984" (25.00 mm)	1.063" (27.00 mm)	1.063" (27.00 mm)
Package / Case	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In	Radial, Can - Snap-In
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active

Engineering Selection Recommendations

688LBB035M2DC (Cornell Dubilier / Illinois Capacitor - LBB Series)

Primary selection for applications requiring the specified thermal and electrical characteristics. ROHS3 compliant. 1118 units in stock. Suitable for general-purpose applications operating within -40°C to 85°C temperature range with 3000-hour lifetime at 85°C.

SLPX682M035E1P3 (Cornell Dubilier Electronics - SLPX Series)

Direct manufacturer alternative from Cornell Dubilier. Identical electrical specifications and temperature range. Reduced height (0.984" vs. 1.063") permits installation in space-constrained applications. Slightly higher ESR (78 mOhm vs. 60.9509 mOhm). ROHS3 compliant. 2964 units in stock. Suitable for applications where vertical clearance is limited.

LGU1V682MELB (Nichicon - LGU Series)

Upgrade option with extended operating temperature range (-40°C to 105°C) and extended lifetime (3000 Hrs @ 105°C). Manufactured by Nichicon. ROHS3 compliant. 1032 units in stock. Suitable for applications requiring higher thermal performance or operation in elevated temperature environments.

LGY1V682MELB25 (Nichicon - LGY Series)

Premium upgrade option with maximum thermal performance: 5000-hour lifetime at 105°C and operating range to 105°C. Manufactured by Nichicon. ROHS3 compliant. 1311 units in stock. Suitable for long-life applications or environments with sustained elevated temperatures.

All substitute parts maintain identical capacitance, voltage rating, tolerance, package configuration, and lead spacing. Selection between options depends on thermal requirements, available board space, and desired component lifetime.

Frequently Asked Questions (FAQ)

Q: Can SLPX682M035E1P3 be used as a direct replacement for 688LBB035M2DC?

A: Yes. Both parts share identical capacitance (6800 µF), voltage rating (35 V), tolerance (±20%), package type (Radial, Can - Snap-In), lead spacing (10.00 mm), and operating temperature range (-40°C ~ 85°C). The primary difference is reduced height (0.984" vs. 1.063"), which is advantageous for space-constrained designs. ESR is slightly higher (78 mOhm vs. 60.9509 mOhm), which is acceptable for general-purpose applications.

Q: What is the advantage of Nichicon LGU1V682MELB over the Cornell Dubilier 688LBB035M2DC?

A: The LGU1V682MELB extends the operating temperature range to 105°C and provides 3000-hour lifetime at 105°C, compared to 85°C for the 688LBB035M2DC. This upgrade is beneficial for applications subject to sustained elevated temperatures or requiring enhanced thermal margin.

Q: What is the advantage of Nichicon LGY1V682MELB25 over other options?

A: The LGY1V682MELB25 provides the longest component lifetime: 5000 hours at 105°C. Combined with the extended operating temperature range (-40°C ~ 105°C), this part is optimal for long-life applications or environments with sustained thermal stress.

Q: Are all substitute parts mechanically compatible with the original 688LBB035M2DC?

A: All substitute parts use identical lead spacing (10.00 mm) and diameter (30.00 mm). Height variations exist: SLPX682M035E1P3 is 0.984" (25.00 mm) versus 1.063" (27.00 mm) for the other parts. Verify available vertical clearance on the PCB before selecting SLPX682M035E1P3.

Q: Do all substitute parts meet RoHS compliance?

A: Yes. All parts listed—688LBB035M2DC, SLPX682M035E1P3, LGU1V682MELB, and LGY1V682MELB25—are ROHS3 compliant.

Q: Which substitute part has the lowest ESR?

A: The 688LBB035M2DC has the lowest ESR at 60.9509 mOhm @ 120Hz. SLPX682M035E1P3 has 78 mOhm @ 120Hz. ESR values for Nichicon parts (LGU1V682MELB and LGY1V682MELB25) are not specified in the provided data.

Q: Can I use a Nichicon part to replace a Cornell Dubilier part in an existing design?

A: Yes, provided the design accommodates the identical lead spacing (10.00 mm), diameter (30.00 mm), and height (1.063" for LGU and LGY series). All parts are electrically equivalent at the specified capacitance, voltage, and tolerance values. Verify thermal requirements: Nichicon parts support operation to 105°C, while Cornell Dubilier 688LBB035M2DC is rated to 85°C.

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