07.14

General Note

TT Electronics reserves the right to make changes in product specification without notice or liability.

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

© TT Electronics plc

www.ttelectronicsresistors.com

Make Possible

High Current

Jumper Chip

LRZ Series

www.bitechnologies.com www.irctt.com www.welwyn-tt.com

General Note

TT electronics reserves the right to make changes in product specification without notice or liability.

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

© TT electronics plc

2. 14

High Current Jumper Chip

LRZ Series

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

04.10

Packaging

LRZ jumper chips are supplied taped and reeled as per IEC 286-3.

Welwyn Components

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Application Notes

Conventional thick film “zero-Ohm” jumper chips typically

have up to 50m resistance values and 1 to 2A current

ratings. LRZ jumper chips offer a solution for currents over an

order of magnitude greater by combining lower resistance

values with better thermal conductivity.

Care should be taken when designing the associated printed

circuit board tracks to ensure that they can carry the required

current without excessive heating, for example by using

multiple layers thermally linked with many vias. Any

temperature rise caused by power dissipated in the PCB tracks

themselves should be allowed for when calculating the

ambient temperature in order to determine whether power

de-rating should be applied. The minimum recommended pad

and trace areas close to the resistor stated under Electrical

Data should be provided at each terminal. For multi-layer

PCB’s, this minimum area requirement should be met by

surface layers rather than buried layers. The actual solder pad

area follows the normal design rules for chip resistors.

LRZ jumper chips themselves can operate at a maximum

temperature of 150˚C (see performance above). For

conventionally soldered jumper chips, the joint temperature

should not exceed 110˚C. This condition is met when the

stated current levels at 70˚C are used.

Ordering Procedure

Ordering Procedure

This product has two valid part numbers:

European (Welwyn) Part Number: LRZ1206-R000 (1206, Pb-free)

L R Z

1

2

0

6

-

R

0

0

0

1

2

3

4

USA (IRC) Part Number: LRC-LRZ1206LF-R000 (1206, Pb-free)

L R C

-

L R Z

1

2

0

6

L

F

-

R 0

0

0

1

2

3

4

5

Note 1: Size 0805 is only available under European part numbering.

1

2

3

6

Type Size Value

Termination & Packing

LRZ 0805 R000

Omit for Pb-free, standard packing

1206

PB = SnPb finish, standard packing

2010

Standard packing is tape & reel

2512

0805, 1206 & 2010

3000/reel

2512

1800/reel

1

2

3

4

5

Packing

LRC

LRZ

1206 Omit for SnPb R000 Standard packing is tape & reel

2010 LF = Pb-free

1206 & 2010

3000/reel

2512

2512

1800/reel

Ordering Procedure

This product has two valid part numbers:

European (Welwyn) Part Number: LRZ1206-R000 (1206, Pb-free)

L R Z

1

2

0

6

-

R

0

0

0

1

2

3

4

USA (IRC) Part Number: LRC-LRZ1206LF-R000 (1206, Pb-free)

L R C

-

L R Z

1

2

0

6

L

F

-

R 0

0

0

1

2

3

4

5

Note 1: Size 0805 is only available under European part numbering.

1

2

3

6

Type Size Value

Termination & Packing

LRZ 0805 R000

Omit for Pb-free, standard packing

1206

PB = SnPb finish, standard packing

2010

Standard packing is tape & reel

2512

0805, 1206 & 2010

3000/reel

2512

1800/reel

1

2

3

4

5

Packing

LRC

LRZ

1206 Omit for SnPb R000 Standard packing is tape & reel

2010 LF = Pb-free

1206 & 2010

3000/reel

2512

2512

1800/reel

High Current

Jumper Chip

LRZ Series