LTO 50

www.vishay.com

Vishay Sfernice

Revision: 09-Dec-15

1

Document Number: 50050

THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE. THE PRODUCTS DESCRIBED HEREIN AND THIS DOCUMENT

Power Resistor Thick Film Technology

LTO series are the extension of RTO types. We used the

direct ceramic mounting design (no metal tab) of our RCH

power resistors applied to semiconductor packages.

FEATURES

• 50 W at 25 °C case temperature heatsink

mounted

• Direct mounting ceramic on heatsink

• Broad resistance range: 0.010

Ω to 550 kΩ

• Non inductive

• TO-220 package: Compact and easy to mount

• Material categorization: for definitions of compliance

Note

• Tolerances unless stated: ± 0.3 mm.

DIMENSIONS in millimeters

STANDARD ELECTRICAL SPECIFICATIONS

MODEL

SIZE

RESISTANCE

RANGE

Ω

RATED POWER

W

LIMITING ELEMENT

V

TOLERANCE

± %

TEMPERATURE

COEFFICIENT

± ppm/°C

CRITICAL

RESISTANCE

Ω

LTO 50

TO-220

0.010 to 550K

50

500

1, 2, 5, 10

150, 250, 700, 900

5K

3.2

16.2

10.4

1.8

5.08

0.6

3.5

1.3

0.8

12.7

Ø 3.2

3.2

MECHANICAL SPECIFICATIONS

Mechanical Protection

Molded

Resistive Element

Thick film

Substrate

Alumina

Connections

Tinned copper

Weight

2 g max.

Mounting Torque

1 Nm

ENVIRONMENTAL SPECIFICATIONS

Temperature Range

-55 °C to +150 °C

Climatic Category

55 / 155 / 56

Flammability

IEC 60695-11-5

2 applications 30 s

separated by 60 s

TECHNICAL SPECIFICATIONS

Dissipation and Associated

Onto a heatsink

Power Rating and

Thermal Resistance

of the Component

50 W at +25 °C (case temp.)

Free air:

2.5 W at +25 °C

Temperature Coefficient

See Performance table

Standard

± 150 ppm/°C

Dielectric Strength

MIL STD 202

10 mA max.

Insulation Resistance

Inductance

≤ 0.1 μH