Ultra Low Profile Power Resistors

WDBR Series

WDBR resistors may be customised in various ways including:

•

Alternative shapes and dimensions up to 406mm x 406mm

•

Integration of temperature measurement elements

•

Alternative ohmic values, tolerance & TCR

•

Increased dielectric withstand voltage

•

Custom braking resistors with UL approval

For a full Applications Note for dynamic braking see http://www.welwyn-tt.com/pdf/application_notes/WDBR.pdf

Overload conditions

Ordering Procedure

Example: WDBR2 at 100 ohms and 10% tolerance with flying leads and packed in a box of 84 pieces:

W D B R 2 – 1 0 0 R K L W

Type

Value (use IEC62 code)

Tolerance (use IEC62 code)

K

10%

Termination

I

Solder pad only

L

Flying leads

T

Push-on connectors

Packing

WDBR1/2,1&2

84/box

WDBR3

70/box

W

Bulk

Pack

WDBR5&7

60/box

Standard

General Note

Welwyn Components reserves the right to make changes in product specification without notice or liability

10/08

All information is subject to Welwyn’s own test data and is considered accurate at time of print.

©Welwyn Components Limited

Welwyn Electronics Park, Bedlington, Northumberland, NE22 7AA, England. Tel: 01670 822181 Fax: 01670 829465 Web: www.welwyn-tt.com

Maximum Single Overload Power

0.1

1

10

100

0.01

0.1

1

10

100

Duration of Overload (s)

Single Overload Energy Capacity

0.01

0.1

1

10

100

0.01

0.1

1

10

100

Duration of Overload (s)

WDBR1/2

WDBR1

WDBR2

WDBR3

WDBR5

WDBR7

WDBR1/2

WDBR1

WDBR2

WDBR3

WDBR5

WDBR7