1. Semiconductor Fuses
Square Semiconductor
Round Semiconductor

2. Topics: Overview of Semiconductor fuse offering
Part # assignments and structure
Recommendations of Round vs. Square
Competitive Overview (Bussmann, SIBA)
The High Speed fuse market

3. Semiconductor Fuse product offering (Round Body North American Style)
A15QS – 150VAC/VDC
A30QS – 300VAC/VDC
A50QS – 500VAC/VDC
A70QS – 700VAC/VDC
A100X – 1000VAC
A120X – 1200VAC
A150X – 1500VAC

4. Semiconductor Fuse product offering (Round Body North American Style)

5. Semiconductor Fuse Indication Options
Round Body Semiconductor Fuses…..……
-4IL; -128IL
-4TI; -128TI
before
after

6. -4TA; -128TA Semiconductor Fuse Indication Options
Round Body Semiconductor Fuses…..……
-4TA; -128TA

7. Semiconductor Fuse Indication Options
Round Body Semiconductor Fuses…..……
AOS (add on switch)
AOS-Q (quick connect terminals)
AOS-S (screw terminals)

8. Semiconductor Fuse Blocks / Holders

9. Semiconductor Fuse product offering
(Square Body N.A. & European Style)

10. Semiconductor Fuse product offering (Square Body North American Style)

11. Semiconductor Fuse product offering (Square Body European Style)

12. Semiconductor Fuse product
PSC Size Structure
Size 3* (A) = 48mm
Size 7* (A) = 71mm A

13. Semiconductor Fuse Indication Option
Square Body Semiconductor Fuses….…
Micro-switch
MS3V1-5 (PSC3*)
MS7V1-5 (PSC7*)
Indicator

14. Typical Semiconductor Fuse
Square Body Semiconductor Fuses….…
Typical Semiconductor Fuse

15. Introduction to Square Body Fuse Technology
Microswitch
Microswitch holder
PSC LR Design
External indicator
Fuse elements
Gaskets
Cover plates
Body
Solid fill (inside the body)
Screws
Terminals

16. Introduction to Square Body Fuse Technology
Microswitch
PSC HV Design
Microswitch holder
External indicator
Gaskets
Fuse elements
Seating-plates
Body
Screws
Solid fill (inside the body)
Terminals

17. Square Semiconductor Fuse
Terminal options:

18. Square Semiconductor Fuse Terminals:
LI; KI; LLI
TTI ; TTF
D08A; D11A
PA; PV

19. Square Semiconductor Fuse Blocks:

20. Square Semiconductor Fuse Blocks:

21. Semiconductor Fuse: IEC Classification
Class aR = Semiconductor protection “IEC ”
Class gR = Semiconductor Full range “IEC ”
European semiconductor fuses are classified as aR but
they are available with different melting characteristics:
: UR (ultra rapid…limited to short circuit only)
: gR Rectifier protection (full range to 165% of rating)
These options allow the end user to use a semiconductor
Fuse that can protect against short circuit and over-loads.

22. Semiconductor Fuse: IEC Classification
URD vs gRB
gRB can provide full
Range protection
The uR cannot

23. Recommendations: Square or Round???
For amp ratings above 400A the square is smaller consistent
size and may provide a cost savings to customer vs.
that of a round body equal
The square semi’s are more globally accepted and should be
recommended if equipment is sold and/or repaired outside
the USA
Square ceramic fuses have a higher temperature capacity:
: round GMG = max of 130 deg C
: square ceramic = 150 – 200 deg C

24. Competition product offering
Bussmann
170M**
170L**

25. Competition product offering
Bussmann

26. Competition product offering
Bussmann

27. Competition product offering
SIBA Fuses

28. Competition product offering
SIBA Fuses
SIBA offers all 690/700V
Versions and 1250/1300V
versions

29. Market Trends for Semiconductor Fuses
UPS: uninterruptable power supplies
The high speed fuse offering is
used within the rectifier and
inverter unit of the UPS. The
high Speed fuses are included
to protect the rectifier diodes
and limit damage to IGBT case
rupture. (IGBT & Diode based)
PSC & QS product lines

30. Market Trends for Semiconductor Fuses STS:Static Transfer Switch
The high Speed fuse potential
is substantial within this market
because these systems are
thyristor based and utilize in-
line high speed fuses for
protection.
Mainly PSC product line

31. Market Trends for Semiconductor Fuses
Soft-Starters: Reduced Voltage Starters
As with STS systems, Soft-Starters
are thyristor based. The vast majority of
soft-starters manufacturers have removed high Speed fuses and forced the end users
to provide protection. Soft-Starters can be
effectively protected by PSC & QS
product.

32. Market Trends for Semiconductor Fuses
Drives: variable frequency (PWM controlled)
Currently the majority of Drives
manufacturers have removed high
speed fuses from Drives rated 150HP
and below. The opportunities are at
the distributors and panel shops
who assemble the control panel.