128KXM035M Equivalent & Substitute Parts Reference

Part Overview

The 128KXM035M is a 1200 µF, 35 V aluminum electrolytic capacitor in radial, can package manufactured by Cornell Dubilier / Illinois Capacitor. This component is classified as Active product status and is designed for general purpose applications requiring through-hole mounting. The part operates across a temperature range of -55°C to 105°C with a rated lifetime of 5000 hours at 105°C.

Substitute parts become necessary when the original manufacturer discontinues production, inventory becomes unavailable, or design requirements shift toward enhanced performance specifications such as extended operational lifetime or automotive-grade reliability ratings.

Key Parameters

Parameter	Value	Unit	Substitution Relevance
Capacitance	1200	µF	Critical - must match exactly
Voltage Rating	35	V	Critical - must match or exceed
Tolerance	±20%	%	Critical - must match
Package Type	Radial, Can	-	Critical - determines mechanical fit
Lead Spacing	0.197" (5.00mm)	inches (mm)	Critical - PCB hole pattern compatibility
Mounting Type	Through Hole	-	Critical - assembly process compatibility
Operating Temperature Range	-55°C to 105°C	°C	Important - application environment
Polarization	Polar	-	Critical - circuit polarity requirement
Lifetime @ 105°C	5000	Hours	Important - reliability and longevity
RoHS Status	ROHS3 Compliant	-	Important - regulatory compliance

Substitute Part Grouping Explanation

Substitution eligibility for the 128KXM035M is determined by strict alignment with the following electrical and mechanical parameters:

Critical Matching Parameters:

Capacitance: 1200 µF (exact match required)
Voltage Rating: 35 V (exact match required)
Tolerance: ±20% (exact match required)
Polarization: Polar (exact match required)
Package Type: Radial, Can (exact match required)
Lead Spacing: 0.197" (5.00mm) (exact match required)
Mounting Type: Through Hole (exact match required)

Compatible Substitute Parts:

The following parts meet all critical matching parameters and are therefore electrically and mechanically interchangeable with the 128KXM035M:

ELXZ350ELL122MK30S (Chemi-Con, LXZ Series) - Meets all critical parameters with extended lifetime rating of 7000 hours at 105°C and automotive-grade AEC-Q200 certification.
UPW1V122MHD (Nichicon, UPW Series) - Meets all critical parameters with extended lifetime rating of 7000 hours at 105°C. Product status is Not For New Designs.

Parameter Comparison

Parameter	128KXM035M (Cornell Dubilier)	ELXZ350ELL122MK30S (Chemi-Con)	UPW1V122MHD (Nichicon)
Capacitance	1200 µF	1200 µF	1200 µF
Voltage Rating	35 V	35 V	35 V
Tolerance	±20%	±20%	±20%
Operating Temperature	-55°C to 105°C	-55°C to 105°C	-55°C to 105°C
Lifetime @ 105°C	5000 Hrs	7000 Hrs	7000 Hrs
Lead Spacing	0.197" (5.00mm)	0.197" (5.00mm)	0.197" (5.00mm)
Package Type	Radial, Can	Radial, Can	Radial, Can
Mounting Type	Through Hole	Through Hole	Through Hole
Size / Dimension	0.492" Dia (12.50mm)	0.492" Dia (12.50mm)	0.492" Dia (12.50mm)
Height - Seated (Max)	1.260" (32.00mm)	1.240" (31.50mm)	1.240" (31.50mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Not For New Designs

Engineering Selection Recommendations

For Active Production and New Designs:

Select ELXZ350ELL122MK30S (Chemi-Con LXZ Series) when substituting the 128KXM035M. This part maintains Active product status, meets all electrical and mechanical compatibility requirements, and provides extended operational lifetime of 7000 hours at 105°C compared to the original 5000 hours. The part carries AEC-Q200 automotive-grade certification, indicating compliance with automotive reliability standards. ROHS3 compliance is maintained.

For Legacy or Existing Inventory Applications:

The UPW1V122MHD (Nichicon UPW Series) is electrically and mechanically compatible with the 128KXM035M and offers the same extended 7000-hour lifetime at 105°C. However, this part is designated as Not For New Designs, making it suitable only for replacement or repair of existing assemblies where design changes are not permitted.

Compliance Considerations:

Both substitute parts maintain ROHS3 compliance and REACH Unaffected status, matching the regulatory profile of the original 128KXM035M. Selection between substitutes should prioritize ELXZ350ELL122MK30S for new product development due to its Active status and automotive-grade certification.

Frequently Asked Questions (FAQ)

Q: Can ELXZ350ELL122MK30S be used as a direct replacement for 128KXM035M?

A: Yes. ELXZ350ELL122MK30S meets all critical electrical parameters (1200 µF, 35 V, ±20% tolerance) and mechanical specifications (radial can package, 5.00mm lead spacing, through-hole mounting). The substitute is mechanically compatible with existing PCB designs. The maximum seated height difference is 0.020" (0.50mm), which does not affect standard through-hole assembly processes.

Q: What is the difference between the two substitute parts?

A: Both ELXZ350ELL122MK30S and UPW1V122MHD are electrically and mechanically equivalent to 128KXM035M. The primary difference is product status: ELXZ350ELL122MK30S is Active and carries AEC-Q200 automotive certification, while UPW1V122MHD is designated Not For New Designs. For new product development, ELXZ350ELL122MK30S is the recommended choice.

Q: Are there any impedance or ESR differences that affect circuit performance?

A: The 128KXM035M specifies 165.8 mOhm ESR at 120 Hz and 41 mOhm impedance. The substitute parts do not provide ESR specifications in the available data. However, both substitutes specify 25 mOhm impedance, which is lower than the original part. This represents improved performance characteristics and does not create compatibility issues in general purpose applications.

Q: Can these parts be used interchangeably in automotive applications?

A: ELXZ350ELL122MK30S carries AEC-Q200 certification and is suitable for automotive applications. The original 128KXM035M and UPW1V122MHD do not carry automotive-grade ratings. For automotive applications, ELXZ350ELL122MK30S is the appropriate selection.

Q: What is the significance of the 7000-hour lifetime rating in the substitutes?

A: The substitute parts provide 7000 hours of rated lifetime at 105°C, compared to 5000 hours for the original 128KXM035M. This represents a 40% increase in operational longevity under maximum temperature conditions, providing extended reliability margins in applications subject to thermal stress.

Q: Are there any height clearance concerns with the substitute parts?

A: The substitute parts have a maximum seated height of 1.240" (31.50mm) compared to 1.260" (32.00mm) for the original 128KXM035M. This 0.020" (0.50mm) reduction in height provides additional clearance and does not create any compatibility issues with standard PCB layouts or enclosure designs.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message