C&H Technology RTO20 User Manual

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Suite 108
Minnetonka, MN 55345

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RTO 20

Vishay Sfernice

Power Resistors, Thick Film Technology

The well known TO 220 package is compact and easy to
mount.

DIMENSIONS in millimeters

RTO 20F - LEADED

4.5

10.1
Ø 3.6

1.3

FEATURES

• 20 W at 25 °C heatsink mounted

• High power dissipation to size ratio

• Wide resistance range from 0.01 Ω to 550 kΩ

• Negligible inductance

• Easy mounting

• TO 220 package: Compact and easy to mount

Two versions of this thick film resistor are available:

• A radial leaded version for PCB mounting

• A flat lead version for surface mounting

RTO 20C - FOR SURFACE MOUNTING

4.5

10.1
Ø 3.6

1.3

15

12.5

13.7

Ø 0.8

5.08

• Tolerance unless otherwise specified: ± 0.4 mm

2.5

8.8

MECHANICAL SPECIFICATIONS

Mechanical Protection Insulated case

Resistive Element Thick Film

Connections Tinned copper
Weight 2.2 g max.

DIMENSIONS

Standard Package TO 220

Insulated case

ENVIRONMENTAL SPECIFICATIONS

Temperature Range - 55 °C to + 155 °C

Climatic Category 55/155/56

Sealing Sealed container

Solder immersion

Flammability IEC 60695-11-5

2 applications 30 s seperated
by 60 s

15

12.5

2

3

1.6

5.08

• Only for RTO 20 version C = during surface mount soldering temperature profile
must not cause the metal tab of this device to exceed 220 °C.

8.8

0.3

ELECTRICAL SPECIFICATIONS

Resistance Range 0.010 Ω to 550 kΩ serie E24

Tolerances (Standard) ± 1 % to ± 10 %

Dissipation and Associated: Onto a heatsink

20 W at + 25 °C

Thermal Resistance
and Nominal Power

Temperature Coefficient
Standard (- 55 °C; + 150 °C)

Limiting Element Voltage U

Dielectric Strength
MIL STD 202

Insulation Resistance ≥ 10

Inductance ≤ 0.1 µH

Critical Resistance 3.12 kΩ

L

R

: 6.5 °C/W

TH (j - c)

free air:

2 W at + 25 °C

See Performance table

± 150 ppm/°C

250 V

2000 V

- 1 min - 10 mA max.

RMS

(between terminals

and heatsink)

6

MΩ

www.vishay.com For technical questions, contact: [e-mail] Document Number: 50005
14 Revision: 24-Nov-08