Circuit Protection

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Fuses, Breakers, and Protection Devices

Fuses, breakers, and protection devices for solar electric systems.

Class T Fuses and Sets At right: various sizes of class T fuses, and a cut-cable type fuse holder with fuse (PFB)
Class T fuses are very fast blow for electronic and electrical circuit protection. Class T fuses are normally used on the input side of inverters for short circuit protection. They are available in a wide range of Amp values, but we normally only stock those commonly used in solar electric systems. These are the 110 Amp, 200 Amp, 300 Amp, and 400 Amp. All of these have the bolt-on lugs. We normally supply the type PFB (shown in picture) fuse holder, which takes a cut cable (cut the cable, and put the fuse holder inline). Other types are available on special order. The fuses are industry standard, and may be Bussman or Littlefuse or other UL approved brand. Class T fuses are rated for 125 volts max for DC.
Fuses with holders FB110T 110 amp class T fuse with holder: For DR1524, U2548, 812, 612, UX612, Statpower 800 & 1000, etc FB200T 200 amp class T fuse with holder: For SW4048/5548, DR1512, DR2424, Statpower 1800, Heart 1500 and 2000 & similar FB300T 300 amp class T fuse with holder: For SW4024, U2512, Heart 2500 & similar FB400T 400 amp class T fuse with holder: For stacked SW2512's, DR2412's, or U2512's Class T (JLLN) type fuses are rated at 125 volts DC and 250 volts AC. F110T Class T 110 amp fuse only F200T Class T 200 amp fuse only F300T Class T 300 amp fuse only F400T Class T 400 amp fuse only
DC Circuit Breakers for Inverters DC250 Breaker with enclosure GJ250 Breaker only DC175 Breaker with enclosure GJ175 Breaker only CD60DC 60 amp breaker for array disconnect CD20 and CD15 Breakers for branch circuits. Mounts on side of DC250/175 enclosure DCBB Negative/Ground bonding block QOU Breakers by Square D, DC rated	Shown at left is the Trace DC250/DC175 breaker with enclosure. At right is an exploded view with the DCBB bonding block mounted. The CD60DC 60 amp array breaker may also be mounted in the enclosure. The CD15/20 breakers mount on the side.
The Trace DC250 and DC175 DC-rated circuit breakers and enclosures are designed specifically for use with single or dual Trace SW and DR inverters. However, they will work with any other inverter in the same power range. UL listed.
LA-302DC for DC LA-302R for AC CA-302R Surge capacitor for extra AC protection	Delta LA-302 Lightning Arrestor and CA-302R surge capacitor Silicon Oxide Arrestor for photovoltaic and other limited current DC applications.
Mini-Breaker 30 & 50 amp Part # 46373 for 30 amp Part # 46374 for 50 amp	Small DC breakers in 30 and 50 amp. Primarily for Air 403 wind generators, but can be used with other DC circuits. Supplied with red boot/cover. $8.00 each.
Mini & Maxi Fuses Maxi-Fuses (Automotive type). Available in 20, 30, 40, 50, and 60 amp sizes. Fits fuse block 46029 shown below. Mini fuses also available.	Maxi-Fuses Min Fuses