Application Data

Class 3110

Application Data for Double Throw Safety Switches

Situations Requiring Fuses



UL Listed Short Circuit Current Ratings

Switch Type

Amperes

Voltage

Rating

UL Listed

Fuse Class

Short Circuit
Current Rating  [1]

(A)

Type 92000

30 A

240 V

H, K

10,000

[2]

Type DT

(Series F)

30–100 A

240 V or

600 V

H, K

 10,000

R, J

200,000

Type DTU [3]

(Series F)

30–100 A

240 V or

600 V

H or K

 10,000

[2]

R, J or T

200,000

DTU224NRB

and

DTU324NRB

(Series E)

200 A

240 V

H, K

 10,000 [2]

DTU324N

(Series E)

200 A

240 V

H, K

 10,000 [2]

R, J

100,000

Type 82,000

All

240 V or

600 V

H, J

10,000[2]

Type DTU

(Series A)

400–600 A

240 V or

600 V

H, K

10,000

R, J, T

100,000

Footnotes

  1. Rating applies to AC only. The UL Listed short circuit current rating for non-fusible switches is based on the switch being used in conjunction with the corresponding fuse type. Evaluation of non-fusible switches in conjunction with molded case circuit breakers has not been performed.
  2. Any brand of circuit breaker or fuse not exceeding the ampere rating of the switch may be used ahead of a non-fusible safety switch when there is up to 10 kA short circuit current available.
  3. The DTU361 and DTU361RB are also suitable for use on a circuit capable of delivering not more than
    (A) 18 kA, 600 Vac maximum when using Type FH circuit breaker rated 30 A maximum or
    (B) 14 kA, 600 Vac maximum when using Type FA circuit breaker rated 30 A maximum.

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