128LMB160M2ED Aluminum Electrolytic Capacitor - Equivalent & Substitute Parts

Part Overview

The 128LMB160M2ED is a 1200 µF, 160 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 stable capacitance and extended operational life at elevated temperatures. The part maintains Active product status with 714 units currently in stock.

Substitute parts become necessary when the original component reaches end-of-life, inventory depletion, or when design requirements permit operation at higher voltage ratings while maintaining identical mechanical and electrical compatibility.

Substiute Parts

128LMB160M2ED

Cornell Dubilier / Illinois CapacitorIn Stock: 737128LMB160M2ED Datasheet

Current PartRFQ

LGN2D122MELC30

NichiconIn Stock: 274115LGN2D122MELC30 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 128LMB160M2ED is determined by strict adherence to the following parameters:

Critical Matching Parameters:

• Capacitance value: 1200 µF (exact match required)
• Tolerance: ±20% (exact match required)
• Package type: Radial, Can - Snap-In (exact match required)
• Mounting type: Through Hole (exact match required)
• Lead spacing: 10.00 mm (exact match required)
• Physical dimensions: 35.00 mm diameter, 32.00 mm maximum seated height (exact match required)
• Polarization: Polar (exact match required)

Allowable Variation Parameters:

• Voltage rating: Substitute must be equal to or greater than 160 V
• Lifetime at temperature: Substitute must be equal to or greater than 3000 Hrs @ 105°C
• Operating temperature range: Substitute must cover the range -25°C to 105°C or extend beyond it
• ESR and ripple current: Substitute values may differ provided mechanical and electrical compatibility is maintained

The LGN2D122MELC30 qualifies as a direct substitute based on these criteria.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitution Basis:

The LGN2D122MELC30 is a qualified direct substitute for the 128LMB160M2ED based on the following engineering criteria:

1. Electrical Compatibility: Both capacitors maintain identical capacitance (1200 µF) and tolerance (±20%). The substitute's 200 V rating exceeds the original 160 V requirement, providing additional voltage margin without circuit modification.

2. Mechanical Compatibility: Lead spacing (10.00 mm), package diameter (35.00 mm), and seated height (32.00 mm) are identical. The snap-in radial can form factor ensures direct PCB mounting compatibility without layout changes.

3. Thermal Performance: Both parts specify 3000 hours lifetime at 105°C. The substitute's operating temperature range (-40°C to 105°C) extends below the original specification (-25°C to 105°C), providing broader environmental coverage.

4. Regulatory Compliance: Both parts are ROHS3 compliant, REACH unaffected, and classified under identical ECCN (EAR99) and HTSUS (8532.22.0040) codes, ensuring equivalent regulatory status.

5. Product Status: Both parts maintain Active product status with established supply chains. The substitute has significantly higher inventory availability (274,082 units versus 714 units).

Selection Criteria:

• Use the 128LMB160M2ED when original component specification or design documentation explicitly requires the Cornell Dubilier / Illinois Capacitor LMB series.
• Use the LGN2D122MELC30 when component availability is a priority, when extended lower temperature operation is beneficial, or when the higher voltage rating provides design margin.

Frequently Asked Questions (FAQ)

Q: Can the LGN2D122MELC30 be used as a direct replacement for the 128LMB160M2ED in existing designs?

A: Yes. The LGN2D122MELC30 is a direct substitute. All critical parameters match: capacitance (1200 µF), tolerance (±20%), lead spacing (10.00 mm), package type (radial snap-in can), and physical dimensions (35.00 mm diameter, 32.00 mm height). No PCB modifications or circuit redesign are required.

Q: What is the voltage rating difference, and does it affect circuit operation?

A: The substitute is rated at 200 V compared to the original 160 V. This higher rating is compatible with any circuit designed for 160 V operation. The substitute provides additional voltage margin and does not require circuit modification. The capacitor will operate safely at voltages up to 160 V.

Q: Are the thermal characteristics equivalent?

A: Both capacitors specify 3000 hours lifetime at 105°C. The substitute's operating temperature range (-40°C to 105°C) is broader than the original (-25°C to 105°C), extending lower temperature capability. Thermal performance at the specified 105°C operating point is equivalent.

Q: Do the mechanical dimensions allow direct PCB mounting?

A: Yes. Both capacitors have identical lead spacing (10.00 mm), diameter (35.00 mm), and maximum seated height (32.00 mm). The snap-in radial can package type is identical. Direct mounting without PCB layout modification is confirmed.

Q: Are there regulatory or compliance differences between these parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical ECCN (EAR99) and HTSUS (8532.22.0040) classifications. Regulatory status is equivalent.

Q: What is the inventory status difference?

A: The original 128LMB160M2ED has 714 units in stock. The substitute LGN2D122MELC30 has 274,082 units available. The substitute offers significantly higher availability for immediate procurement.

Q: Can these capacitors be used interchangeably in the same circuit?

A: Yes. The capacitors are electrically and mechanically interchangeable. Both maintain the same capacitance value, tolerance, and thermal lifetime. The substitute's higher voltage rating and extended temperature range do not create incompatibility.

Q: Are there any ripple current differences that affect circuit design?

A: The substitute specifies higher ripple current ratings at both low frequency (2.65 A @ 120 Hz versus 2.41 A) and high frequency (3.975 A @ 50 kHz versus 3.5427 A @ 10 kHz). These higher ratings indicate improved ripple current handling capability and do not require circuit modification.