Classification Of capacitor

Capacitors are often classified by their dielectric material and sometimes by motor/fan capacitor codes. If you're referring to markings like Type B, Type C, these can mean different things depending on the application. 

In Ceiling Fan Capacitors

You may see:

• CBB61 – Fan capacitor (polypropylene film)

• CBB60 – Motor run capacitor

• CD60 – Motor starting capacitor (electrolytic)

In Power Factor Capacitors

Manufacturers may use:

• Type A: Standard duty

• Type B: Heavy duty

• Type C: Super heavy duty

The exact meaning depends on the manufacturer and application.

From the marking on The capacitor:

• 45 MFD (µF), 440 VAC, 50 Hz

• SH MPP

• B

• P0

• 25/85/21

This is a Metallized Polypropylene Film Motor Run Capacitor.

Meaning of the markings:

• MPP = Metallized Polypropylene capacitor

• SH = Self-Healing (small dielectric breakdowns repair themselves)

• B = Safety Class B (according to IS 2993 standard for motor run capacitors)

• P0 = No internal over-pressure disconnector

• 45 MFD = 45 µF capacitance

• 440 VAC = Maximum continuous operating voltage

This type is commonly used as a motor run capacitor for:

• Single-phase induction motors

• Air conditioners

• Water pumps

• Compressors

1. What is a Capacitor? 

A capacitor is an electrical component that stores energy in an electric field.

C = Q / V

Where:

• C = Capacitance (Farad)

• Q = Charge (Coulomb)

• V = Voltage (Volt)

2. Functions of Capacitors in Industry

A. Power Factor Correction (PFC)

• Reduces reactive power.

• Improves power factor.

• Reduces electricity penalties.

• Decreases transformer and cable loading.

B. Motor Starting

• Provides high starting torque.

• Creates phase shift between windings.

C. Motor Running

• Improves running efficiency.

• Maintains phase shift during operation.

D. Filtering

• Removes electrical noise.

• Used in VFDs, SMPS, PLC panels.

E. Energy Storage

• Used in UPS, inverters, welding machines.

3. Types of Industrial Capacitors

3.1 Electrolytic Capacitor

Features

• High capacitance

• Polarized (DC)

• Compact size

Uses

• SMPS

• DC drives

• UPS

• VFD DC bus

Disadvantages

• Shorter life

• Sensitive to temperature

3.2 Metallized Polypropylene Capacitor (MPP)

Features

• Self-healing

• Low loss

• Long life

Uses

• Motor run capacitor

• Power factor correction

• AC applications

Example

• CBB60

• CBB65

• Your Tibcon capacitor