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Mailing Address:

P.O. Box 2617

Waterloo, Iowa 50704

Shipping Address:

201 E. Mullan Avenue

Waterloo, Iowa 50704

Phone: (319) 234-6681

Fax: (319) 234-6684

Email Sales: click here

Office hours:

Monday-Friday,

8am-5pm, central time

Our featured vendor is Philmore

(LKG Industries).

Click on the picture for more details.

Our website is dedicated to

our dear friend, Barry Greenberg, 12/05/44 - 02/22/01

Circuit Breakers

At Farnsworth Electronics, Inc. we carry a wide variety of circuit breakers for all your electronic needs

and NTE offers one of the best cross reference guides to allow you to choose exactly which circuit breaker

is right for your application. We also carry other brands of circuit breakers such as Mechanical Products

and Potter & Brumfield.
 

We've got one of our featured vendors, Philmore Manufacturing's catalog available online.

Click here to see the catalog.

R58 series thermal circuit breaker from NTE:

  • Can NOT be manually tripped
  • 0.250 Quick connect terminals
  • Visual trip indicator
  • Push button to reset breaker

Specifications of the R58 series:

Trip Times:
NTE Part Number Current Rating (Amps)

Typical Resistance (Ohms)
R58-1A 1.0 1.35
R58-2A 2.0 0.32
R58-3A 3.0 0.18
R58-4A 4.0 0.10
R58-5A 5.0 0.026
R58-6A 6.0 0.026
R58-7A 7.0 0.020
R58-8A 8.0 0.020
R58-10A 10.0 0.014
R58-12A 12.0 0.010
R58-15A 15.0 0.010
R58-20A 20.0 0.006
R58-25A 25.0 0.005
R58-30A 30.0 0.004
R58-35A 35.0 0.004
1-4 Amp Types   5 to 35 Amp Types  
Rated
Load		 Trip Times Rated
Load		 Trip Times
100% No Trip 100% No Trip
145% Trip in 1 Hr. 145% Trip in 1 Hr.
200% 10 to 45 Sec. 200% 6.0 to 30 Sec.
400% 3.0 to 14 Sec. 400% 1.6 to 4.5 Sec.
600% 1.4 to 7.0 Sec. 600% 0.6 to 1.7 Sec.
800% 0.75 to 4.3 Sec. 800% 0.25 to 0.9 Sec.
1000% 0.5 to 3.4 Sec. 1000% 0.15 to 0.65 Sec.
 

R59 series thermal circuit breaker from NTE:

  • 0.250 Quick connect terminals
  • Visual trip indicator
  • Replaces slow blow glass cartridge fuse
  • Snap in mounting
  • Push button to reset breaker

Specifications of R59 series:

Trip Times:
NTE Part Number Current Rating (Amps) Typical Resistance (Ohms)
R59-0.25A 0.25 14.0
R59-0.5A 0.50 3.55
R59-1A 1.0 0.89
R59-2A 2.0 0.17
R59-3A 3.0 0.069
R59-4A 4.0 0.043
R59-5A 5.0 0.030
R59-6A 6.0 0.026
R59-7A 7.0 0.017
R59-8A 8.0 0.016
R59-10A 10.0 0.011
R59-12A 12.0 0.009
R59-15A 15.0 0.007
R59-20A 20.0 0.007
0.25 to 2 Amp Types   3 to 20 Amp Types  
Rated
Load		 Trip Times Rated
Load		 Trip Times
100% No Trip 100% No Trip
175% Trip in 1 Hr. 135% Trip in 1 Hr.
200% 4.5 to 28 Sec. 200% 2.2 to 15 Sec.
400% 1.0 to 6.5 Sec. 400% 0.55 to 1.8 Sec.
600% 0.4 to 4.0 Sec. 600% 0.27 to 0.7 Sec.
- - 800% 0.17 to 0.45 Sec.
- - 1000% 0.12 to 0.3 Sec.