SiC JFETs . . . The ideal circuit protection solution

Current Limiting: Rapid current decrease due to self-heating, limiting I2t

Normally-On JFETs: VTH invariant with temperature

Ability to handle peak TJ>600C, upto the melting point of Al

SiC JFET Selector Guide

Part Number Package V RDS(on) typ Id max
ID New Part Number Package V RDS(on) typ Id max Data Sheet SPICE Model Buy Now
1 UJN1205K TO247 1200 45 38
2 UJN1205Z Die 1200 45 38
3 UJN1208K TO247 1200 80 21
4 UJN1208Z Die 1200 80 21

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Normally-On JFET
limits current flow
from a surge event,
sustaining a 600C
temperature rise

Current limiting function


Back-to-Back Normally-On JFETs lead to a bidirectional current limiting device. Low series resistance, excellent current limiting behavior.

High Side Switch (DC Breaker)


Normally-On JFETs are used to create self-powered two-terminal fast acting circuit breakers.