186MABA03KJS Film Capacitor Equivalent & Substitute Parts

Part Overview

The 186MABA03KJS is an 18 µF film capacitor manufactured by Cornell Dubilier / Illinois Capacitor, rated for 500V DC operation with polypropylene metallized dielectric. This component is designed for motor run applications requiring high voltage and stable capacitance performance across extended temperature ranges. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for direct replacement in existing designs.

Key Parameters

Parameter	Specification
Capacitance	18 µF
Tolerance	±10%
Voltage Rating (DC)	500V
Voltage Rating (AC)	250V
Dielectric Material	Polypropylene (PP), Metallized
Operating Temperature Range	-40°C to 100°C
Mounting Type	Through Hole
Package Type	Radial
Physical Dimensions	42.50mm L × 30.00mm W
Height (Seated)	45.00mm (Max)
Lead Spacing	37.50mm
Termination Type	PC Pins
Application	Motor Run
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the 186MABA03KJS are identified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution criteria are:

Electrical Parameters (Must Match Exactly):

Capacitance: 18 µF
Tolerance: ±10%
Voltage Rating (DC): 500V
Voltage Rating (AC): 250V
Dielectric Material: Polypropylene (PP), Metallized

Mechanical Parameters (Must Match Exactly):

Mounting Type: Through Hole
Package Type: Radial
Physical Dimensions: 42.50mm L × 30.00mm W
Height (Seated): 45.00mm (Max)
Lead Spacing: 37.50mm
Termination: PC Pins

Compliance Parameters (Must Match or Exceed):

RoHS Status: ROHS3 Compliant
Operating Temperature Range: -40°C to 100°C

All identified substitute parts meet these criteria and are manufactured by Nichicon, an active supplier with current production status.

Parameter Comparison

Parameter	186MABA03KJS (Cornell Dubilier)	MABA035180KJL (Nichicon)	MABA035180KJS (Nichicon)
Capacitance	18 µF	18 µF	18 µF
Tolerance	±10%	±10%	±10%
Voltage Rating (DC)	500V	500V	500V
Voltage Rating (AC)	250V	250V	250V
Dielectric Material	Polypropylene (PP), Metallized	Polypropylene (PP), Metallized	Polypropylene (PP), Metallized
Operating Temperature Range	-40°C to 100°C	-40°C to 100°C	-40°C to 100°C
Mounting Type	Through Hole	Through Hole	Through Hole
Package Type	Radial	Radial	Radial
Physical Dimensions	42.50mm L × 30.00mm W	42.50mm L × 30.00mm W	42.50mm L × 30.00mm W
Height (Seated)	45.00mm (Max)	45.00mm (Max)	45.00mm (Max)
Lead Spacing	37.50mm	37.50mm	37.50mm
Termination	PC Pins	PC Pins	PC Pins
Application	Motor Run	Motor Run	Motor Run
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active

Engineering Selection Recommendations

Both Nichicon substitute parts (MABA035180KJL and MABA035180KJS) provide direct functional equivalence to the obsolete 186MABA03KJS. Selection between the two Nichicon alternatives is determined by application-specific requirements and supply chain considerations:

MABA035180KJL: Active production status with 903 units in current inventory. ROHS3 compliant. Suitable for new designs and production environments requiring established supplier relationships.

MABA035180KJS: Active production status with 851 units in current inventory. ROHS3 compliant. Functionally identical to MABA035180KJL with equivalent compliance certifications.

Both parts satisfy motor run application requirements and operate across the full -40°C to 100°C temperature range. Selection may be based on availability, lead time, or existing supplier agreements. No performance differentiation exists between the two alternatives based on provided specifications.

Frequently Asked Questions (FAQ)

Q: Can MABA035180KJL or MABA035180KJS be used as direct replacements for 186MABA03KJS?

A: Yes. Both Nichicon parts are parametric equivalents meeting all electrical and mechanical specifications. They feature identical capacitance (18 µF), voltage ratings (500V DC / 250V AC), dielectric material (polypropylene metallized), physical dimensions (42.50mm × 30.00mm), lead spacing (37.50mm), and operating temperature range (-40°C to 100°C). Through-hole radial mounting and PC pin termination are identical.

Q: What is the difference between MABA035180KJL and MABA035180KJS?

A: Both parts are functionally identical across all electrical and mechanical parameters. Differences are limited to manufacturer inventory levels (903 units for KJL, 851 units for KJS) and internal Nichicon product coding. No technical differentiation exists.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both MABA035180KJL and MABA035180KJS are ROHS3 compliant, matching the compliance status of the original 186MABA03KJS.

Q: Will the substitute parts fit existing PCB layouts designed for 186MABA03KJS?

A: Yes. Physical dimensions, lead spacing (37.50mm), and radial package configuration are identical. No PCB layout modifications are required.

Q: What is the operating temperature range for the substitute parts?

A: Both Nichicon alternatives operate across -40°C to 100°C, identical to the original part specification.

Q: Are the substitute parts suitable for motor run applications?

A: Yes. Both MABA035180KJL and MABA035180KJS are rated for motor run applications with 500V DC and 250V AC voltage ratings, matching the original 186MABA03KJS specification.

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