* Power Dissipation - The maximum wattage rating depends upon the amount of heat which can be transferred to the surroundings while not exceeding the maximum element

temperature. Ambient air temperature, velocity of cooling air, thermal resistance of heat and the temperature of surrounding objects will affect this transfer, this must be taken

into account when selecting a resistor.

Low Resistance Metal

Element Resistors

LOB Series

(0.005

Ω to 0.1Ω)

Dimensions (mm)

Type

L max.

D max.

f min.

d nom.

C

LOB-1

9.9±0.3

3.6±0.2

38.1±3.2

0.813±0.05

33.27

LOB-3 14.22±0.25 5.33±0.25 34.93±3.18 0.81±0.05

33.27

LOB-5 23.37±0.25 8.38±0.25 31.75±3.18 1.02±0.05

42.42

General Note

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

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

Telephone: +44 (0) 1670 822181 · Facsimile: +44 (0) 1670 829465 · Email: info@welwyn-tt.com · Website: www.welwyn-tt.com

LOB-1

LOB-3

LOB-5

Continuous power dissipation at 25°C in free air

watts

1

3

5

Overload power for 5 seconds

watts

5

15

25

Maximum working voltage

volts

√1xR

√3xR

√5xR

Maximum storage temperature

°C

175

175

175

Electrical Data

Physical Data

Issue B · 03.02

A subsidiary of

TT electronics plc

Welwyn Components

104

L

C

D

f

d

contact point

contact point

Description

LOB

Ω Series power precision metal element resistors feature

resistance values down to 0.005

Ω with virtually no

inductance. Available in 1, 3 and 5 watt rated axial leaded

packages, these resistors are compatible with automatic

insertion equipment.

Applications

Construction

LOB

Ω Series resistors feature tinned copper leads welded

directly to a low temperature coefficient resistance element in

a highly automated proprietary process. The leaded resistor

elements are then encapsulated in a moulding compound.