MHP TO-220 Series Issue May 2009

Telephone: 361 992 7900 • Facsimile: 361 992 3377 • Website: www.irctt.com

MHP TO-220 Series

Power Resistor

For additional information or to discuss your specific requirements, please contact our

Applications Team using the contact details below.

Ordering Data

Prefix

TFP - MHP20LF - 1R50 - J

Style

MHP20LF = 20W, TO-220 style power resistor

MHP35LF = 35W, TO-220 style power resistor

07017 = DSCC drawing (07017) ver. of above

MHP50LF = 50W, TO-220 style power resistor

07018 = DSCC drawing (07018) ver. of above

Resistance Code

4-digit resistance code.

Ex: 10R0 = 10Ω, 1K00 = 1KΩ

Absolute Tolerance Code

J = ±5%; F = ±1%

Standard Packaging

RoHS compliant tube (50 pcs per tube)

Application Notes:

1. Insulating material is unnecessary between the heat sink

and the tab, as the resistor film is isolated by the internal

alumina substrate.

2. When mounting with a fastener, thermal grease is

recommended.

3. Thermal design should satisfy the following equation: Case

Temperature (Tc) + [Thermal Resistance (ROJC) x Power

applied (Watts)]

≤ 155°C over the full operating temperature

of the application.

4. Resistor film temperature is not to exceed 155°C during

operation.

5. This product is RoHS compliant by exemption according to

RoHS directive 2002/95/EC exemptions 5 & 7, as they apply

to lead in glass and internal solder connections.

Temperature Rise Data

Power (Watts)

140

120

100

80

60

40

20

0

0

5

10

15

20

25

30

35

40

45

50

MHP20

MHP35

MHP50

Resistor Film Temp Rise with Respect to Flange Temp

Power Derating Data

50

155°

25°

10

100

Flange Temperature (°C)

Typical TCR For Low Values

0.01

0.1

1.0

Resistance (Ohms)

250

200

150

100

50

0