In our continuing strategy to deliver unparalleled circuit protection solutions,

technical expertise and application leadership, we proudly introduce the

WICKMANN Group and its products to the Littelfuse portfolio.

040706

www.littelfuse.com

A: LRD380

B: LRD450

C: LRD730

1.00

10.00

100.00

0.01

0.10

1.00

10.00

100.00

Fault Current (A)

AB

C

LRD

Thermal Derating Chart

Model

Ambient Operation Temperature - I

-40 °C

-20 °C

0 °C

23 °C

40 °C

50 °C

60 °C

70 °C

85 °C

LRD190

2.80

2.50

2.30

1.90

1.60

1.50

1.40

1.20

1.00

LRD190S

2.80

2.50

2.30

1.90

1.60

1.50

1.40

1.20

1.00

LRD260

3.80

3.40

3.10

2.60

2.20

2.00

1.90

1.70

1.40

LRD260S

3.80

3.40

3.10

2.60

2.20

2.00

1.90

1.70

1.40

LRD380

5.50

4.90

4.40

3.80

3.30

3.00

2.80

2.50

2.10

LRD450

6.50

5.80

5.30

4.50

3.90

3.60

3.30

2.90

2.50

LRD550

8.00

7.10

6.20

5.50

4.70

4.30

4.00

3.60

3.00

LRD600

8.70

7.80

7.10

6.00

5.20

4.70

4.40

3.90

3.30

LRD730

10.60

9.50

8.60

7.30

6.30

5.70

5.40

4.70

4.00