These symbols indicate the fuse speed characteristic:
Time-Delay
Non-Delay
Ultra-Rapid
gL/gI gL/gG träg (or symbol shown on left)
flink F
überflink silized FF gR (a yellow-stripe)
(or symbol shown on right)
Correct speed selection is critical to safety. Time-Delay
fuses usually protect Motors & Main Disconnects. Ultra-Rapid (Rectifier) fuses are used mainly in
DC Drives. Non-Delay fuses are rare. If unsure which type you require, please contact us.
Diazed/Normal Type (DII & DIII) click the part number for a photo