Cornell Dubilier DCMX453U100DF2B 45,000µF 100VDC Industrial Electrolytic Capacitor

Cornell Dubilier DCMX453U100DF2B 45,000µF 100VDC Industrial Electrolytic Capacitor

Heavy-Duty Computer-Grade Aluminum Electrolytic Capacitor

Offered is a genuine Cornell Dubilier / CDM DCMX Series industrial aluminum electrolytic capacitor, part number DCMX453U100DF2B.

This is a very large 45,000 µF, 100 VDC screw-terminal capacitor designed for high-current DC power supplies, industrial equipment, energy-storage circuits, filtering systems, motor controls, welding equipment, UPS systems and other demanding electrical/electronic applications.

The capacitor is marked Made in USA and also carries the secondary/OEM identification number 658-9041-939.

PRODUCT IDENTIFICATION

Manufacturer: Cornell Dubilier / CDM
Series: DCMX
Part Number: DCMX453U100DF2B
Secondary / OEM Number: 658-9041-939
Capacitance: 45,000 µF
Equivalent Capacitance: 0.045 Farad
Rated Voltage: 100 VDC
Capacitor Type: Aluminum Electrolytic
Construction: Computer-Grade / Industrial
Terminal Type: Heavy-Duty Screw Terminal
Polarity: Polarized DC
Country of Manufacture: USA
Case Code: DF

APPROXIMATE PHYSICAL SIZE

The DF case configuration used in the DCMX family is approximately:

Diameter: 3.0 inches / 76 mm
Body Length: approximately 5.6 inches / 143 mm
Terminal Spacing: approximately 1.25 inches / 31.8 mm

Please compare the photographs and dimensions with your original capacitor before purchasing for a replacement application.

HIGH ENERGY STORAGE CAPABILITY

With a capacitance of 45,000 µF at 100 volts, this capacitor can theoretically store approximately:

225 Joules at 100 VDC

This makes it substantially larger and more powerful than ordinary PCB electrolytic capacitors.

It was designed to serve as a major DC energy reservoir and filtering component in high-current electronic equipment.

TYPICAL APPLICATIONS

The Cornell Dubilier DCMX family was designed for demanding power-supply filtering and energy-storage applications.

Suitable applications may include:

● Industrial DC power supplies

● High-current rectifier power supplies

● Welding equipment

● Industrial welders

● UPS and backup power systems

● Inverter systems

● Motor drives

● Variable-frequency drive systems

● Servo amplifiers

● Industrial automation equipment

● Battery chargers

● High-current DC charging systems

● Large linear power supplies

● Power-conditioning equipment

● Industrial control systems

● Computer hold-up power supplies

● Telecom power equipment

● High-power audio amplifiers

● Laboratory power supplies

● Electronic test equipment

● Medical equipment power systems

● Legacy industrial machinery

● Specialized OEM electronic equipment

OEM / SECONDARY PART NUMBER

The capacitor carries the additional identification:

658-9041-939

Research indicates that similar 658-series identification numbers can be found on large industrial capacitors used through OEM and industrial MRO supply channels.

The exact original machine associated with 658-9041-939 has not been positively identified.

For buyers restoring older industrial equipment, please compare both numbers:

DCMX453U100DF2B
658-9041-939

POSSIBLE MODERN EQUIVALENT RANGE

Modern replacement capacitors may generally fall in the range of:

45,000–47,000 µF
100 VDC or higher
Screw-terminal aluminum electrolytic

Potential replacement suitability must also consider:

● Physical dimensions

● Terminal spacing

● Ripple-current rating

● ESR

● Operating temperature

● Surge-voltage rating

● Mounting arrangement

● Polarity

● Application-specific requirements

A similar capacitance and voltage rating alone does not guarantee compatibility.

IMPORTANT INSTALLATION INFORMATION

This is a polarized DC electrolytic capacitor.

It is NOT an AC motor-start or motor-run capacitor.

Correct polarity must always be observed during installation.

Reverse polarity or exceeding the rated voltage can permanently damage the capacitor and may create a serious safety hazard.

SAFETY WARNING

Large electrolytic capacitors can retain a potentially dangerous electrical charge even after equipment has been switched off or disconnected from power.

At its full rated voltage, this capacitor can store approximately 225 joules of energy.

Always use appropriate electrical safety procedures and properly discharge the capacitor before handling terminals.

Installation and testing should be performed by qualified personnel familiar with high-energy electrical systems.

CONDITION

Please review all photographs carefully for the exact cosmetic condition, markings, terminals and configuration of the capacitor being offered.

For vintage, surplus or older electrolytic capacitors, buyers should perform appropriate electrical testing before placing the component into critical equipment.

Recommended testing may include:

● Capacitance

● ESR

● Leakage current

● Insulation condition

● Terminal condition

● Controlled voltage reforming when appropriate

IDEAL FOR

This component may be particularly useful for:

● Industrial equipment repair technicians

● Electronics restoration specialists

● Power-supply repair facilities

● Welding-equipment technicians

● Industrial maintenance departments

● MRO inventory

● Vintage industrial equipment restoration

● OEM equipment repair

● Electronics laboratories

● Engineering projects requiring very high DC capacitance

SEARCH / CROSS-REFERENCE NUMBERS

Cornell Dubilier DCMX453U100DF2B
CDM DCMX453U100DF2B
CDE DCMX453U100DF2B
DCMX453U100DF2B
658-9041-939
45000uF 100V capacitor
45,000µF 100VDC capacitor
45000 MFD 100V capacitor
100V screw terminal capacitor
Computer grade electrolytic capacitor
Industrial power supply capacitor
Large electrolytic capacitor
DC energy storage capacitor

Please verify specifications and compatibility with your equipment before purchase.