Type GCB Circuit Protectors

Class 9080 / Refer to Catalog 9080CT9601

Thermal-Magnetic Circuit Protectors

GCB100

9080GCB Thermal-Magnetic Circuit Protectors

Maximum Current [1]

Internal Resistance

Ω

Maximum Voltage

Catalog Number

 0.1

133

250 Vac
65 Vdc

GCB01

 0.5

6.6

GCB05

 0.8

2.55

GCB08

 1.0

1.97

GCB10

 1.2

1.22

GCB12

 1.5

0.86

GCB15

 2.0

0.49

GCB20

 2.5

0.31

GCB25

 3.0

0.20

GCB30

 4.0

0.10

GCB40

 5.0

0.08

GCB50

 7.0

0.03

GCB70

10.0

<0.02

125 Vac
65 Vdc

GCB100

15.0

<0.02

GCB150

Inrush Ratio Correction Table


note

For resistive loads, use inrush correction factor of 1.0.

Inrush Ratio

1:1 to 1:4

1:5

1:6

1:7

1:8

Factor

1.3

1.4

1.5

1.6

1.7

Ambient Temperature Correction Table

Ambient
Temperature

70oF

100oF

120oF

140oF

160oF

180oF

200oF

(21.1oC)

(37.8oC)

(48.9oC)

(60oC)

(71.1oC)

(82.2oC)

(93.3oC)

Factor

1.0

1.1

1.2

1.3

1.4

1.5

1.6

Tripping Times in Seconds at 70 oF (21.1 oC)


note

When several protectors are channel mounted adjacent to each other, the “no trip” current will be 80% of rated current at 70 oF.

Percent Rated
Current

100%

200%

300%

400%

500%

600%

1000%

2000% and
greater

Tripping Time (s)

no trip

10–40

38

1.5–9

0.8–6

0.003–4

0.003–2

Max. 0.02


Selection

To properly select a Class 9080 Type GCB circuit protector, follow these steps:

  • Determine the inrush correction factor from Inrush Ratio Correction Table.

  • Determine the temperature correction factor from Ambient Temperature Correction Table.

  • Determine the sealed current of the load that is being protected.

  • Multiply the sealed current by the two correction factors and choose the closest circuit protector.


note

Choosing a circuit protector with a value lower than the calculated value might cause nuisance tripping, while choosing the larger might provide a protector that will not properly protect the load .

File: E233026
CCN:QVNU2

File: 025490
Class: 3211–07

 

Example: Solenoid with sealed current of 0.75 A, an inrush ratio of 1:6, and in an ambient temperature of 85oF: 0.75 x 1.5 x 1.05 = 1.18. Choose the 1.2 A protector.

Tripping Time: Tripping time of the circuit protector is determined from Tripping Times in Seconds. Divide the circuit protector value by the temperature correction factor from Ambient Temperature Correction Table to determine actual rated current referenced in Tripping Times in Seconds.

How to Order

To Order Specify

Catalog Number

  • Class Number

  • Type Number

Class

Type

9080

GH10

Footnotes

  1. These maximum current values assume the use of insulated copper conductors with 167 oF (75 oC) temperature rating and are calculated based on NEC Article 310, Table 310-16. In most cases this value is the maximum ampacity of the wire which has the greatest current carrying capacity. The actual allowable current for a particular application depends on the size, insulation class, and other characteristics of the wire used. The UL ratings are shown. The CSA rating may be higher or lower. Refer to the catalog for CSA ratings.

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