CDM Cornell Dubilier

Specifications

permissible internal core temperature, 125 ºC.

are for 85 ºC case temperatures. For air temperatures

without a heatsink use the Ambient Temperature, No

Heatsink multipliers.

hottest spot, the core, to ambient air is:

where

Өcc is the thermal resistance from core to case

and

Өca from case to ambient. To calculate maximum

ripple capability with the MLP attached to a heatsink

use the maximum core temperature and the values for

Өcc.

As an illustration, suppose you operate an

MLS332M060EB1C in 65 ºC air and attach it to a com-

mercial heatsink with a free-air thermal resistance of

2.7 ºC/W. Use a good thermal grease between the MLS

and the heatsink, and the total thermal resistance is 2.7

+ 1.8 or 4.5 ºC/W. The power which would heat the

core to 125 ºC is (125-65)/4.5 or 13.3 W. For an ESR

of 31 m

Ω, 13.3 W equates to a ripple current of 20.7A,

however, the wire leads are rated for only 20 A.

Outline Drawings

MLS

821

M

200

EB

O

A

Type

Capacitance Tolerance

Rated

Voltage

Case Code

Insulation

Mounting Style

MLS

821=820 µF

102 = 1000 µF

M=±20%

Vdc

EK, L=1.5 in.

EA, L=2.0 in.

EB, L=3.0 in.

0 = bare can

1 = polyester

A = mounting tabs

C = two leads/no tabs

D = hook leads/tabs

Part Numbering System

Case

Length

Weight

Code

L (in)

(g)

EK

1.5

43

EA

2.0

76

EB

3.0

92

Style A: Mounting Tabs

Style C: Two Leads, No Tabs

Style D: Hook Leads

Note: The mounting tabs are at case potential and the negative lead connects to the case through the electrolyte.