Fuseology Fuse Facts and Fuse Selection Guide Introduction to Circuit Protection 4 www.littelfuse.com FUSE SELECTION GUIDE Many of the factors involved with fuse selection are listed below:
Series: FLM - Littelfuse
The FLM series 250 V fuses are designed to protect control circuit transformers, solenoids, and other circuits with high in-rush currents. They are also excellent for supplemental protection of small motors. The time-delay design can carry an overload several times the normal load for a short period of time without blowing. The FLM fuses are non-indicating and may be used with …
Based on above waveform definition, we can see there are different definitions for pulse 5b US and US* in ISO16750-2 and ISO7637-2. Figure 2. Pulse 5a Waveform in ISO16750-2 Figure 3.Pulse 5a Waveform in ISO7637-2
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Symbol Definition Ratings Conditions min. typ. max. Unit 140 VCE(sat) V total power dissipation 500 W collector emitter leakage current 7.5 V t turn-on delay time 230 ns reverse bias safe operating area A VGES ±20 V VGEM max. transient gate emitter voltage T = °CC V Ptot gate emitter threshold voltage RBSOA 300 ±30 Brake IGBT + Diode T = 125 ...
than high voltages mean that many arc-flash incidents actually occur on low-voltage equipment. *Source: Industrial Power System Grounding Design Handbook by J.R. Dunki-Jacobs, F.J. Shields, and Conrad St. Pierre, page xv.
Symbol Definition Ratings typ. max. IR V I A VF 1.27 R 0.35 K/W R min. 99 VRSM V T = 25°CVJ 200 V = VR T = °CVJ 15 mA I = AF T = 25°CVJ V T = °CC 100 Ptot T = 25°CC 357 W R 0.2 K/W 150 800 max. non-repetitive reverse blocking voltage reverse current forward voltage drop total power dissipation Conditions Unit 1.60
Table PZ2 — Definition of Terms V Z Zener clamping voltage measured at current I ZT and 20°C. I ZT Test current at which V Z is measured. I HOLD Maximum steady state current I PTC that will not generate a trip event at the specified temperature. Ratings assume I FLT = 0A. R Typ Typical resistance between V IN and V OUT pins when the device ...
Mean forward current IF(AV) of one module for a sine half wave for various cooling modes as a function of the cooling medium temperature T amb for a resistive load (horizontal mounting).
4 of 5 Supplemental Fuses FLM Series Littelfuse.com/FLM ©2022 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 07/28/2022