Switchboards and industrial panels built on a 60 mm busbar system need fuse protection that clips straight onto the bars instead of using cable-connected fuse blocks. This is the Wöhner 33311 QUADRON 60Classic busbar-mounted fuse holder, supplied through Techspan: a 3-pole holder for Class J fuses from 225 to 400 A, rated 600 V, with box terminals for top or bottom cable outlet. Fuses are sold separately.
Why panel builders pick it
- Mounts directly on 30 x 10 mm and section busbars of the Wöhner 60Classic system.
- Holds Class J fuse-links from 225 to 400 A, 3 poles.
- Box terminals take AWG 4 to 600 MCM for top or bottom cable exit.
- Push-on covers give shock protection; halogen-free construction.
- UL (E230163) and CSA (110285) approved.
Specifications
| Spec |
Detail |
| Brand |
Wöhner (supplied by Techspan) |
| Model |
33311 (QUADRON 60Classic) |
| Type |
Busbar-mounted Class J fuse holder, 3-pole |
| Fuse range |
Class J, 225-400 A |
| Rating (UL) |
400 A, 600 V AC/DC |
| Busbars |
30 x 10 mm and section busbars, 60 mm system |
| Terminals |
Box terminals, AWG 4 to 600 MCM, copper only |
| Terminal torque |
336 lb-in |
| Dimensions (W x H x D) |
256 x 285 x 122 mm |
| Approvals |
UL E230163; CSA 110285 |
Pro tip from the counter
The box terminals are not rated for aluminum, so aluminum feeders need to be spliced to copper or terminated elsewhere. Torque the terminals to Wöhner's 336 lb-in with a calibrated torque wrench; an under-torqued lug carrying a 400 A Class J load is exactly what shows up hot on the first thermal scan.
Best for: industrial switchboards, OEM control panels on 60 mm busbar systems, motor control and feeder protection up to 400 A, panel shops
Ships across Canada from Vaughan, ON. Panel builders can request a quote or call (905) 553-7171 for project pricing and lead time.