903-0628-00 Rev. 1
Model 903-HD User's Guide – FMB-X-2.5
APPENDIX B – FUSES
MODEL 903 FUSE PROTECTION
REMOTE MODULE RACK
Qty.
PSU/Fan
Fuse Part Number
Rating
Fuse Type
Manufacturer
Comments
1
24 VDC
High Density
0454005
5 A
Time Delay
Littelfuse
SMT fuse F3 is located on remote
HD backplane. This fuse protects
the primary DC voltage input.
1
24 VDC Fan
miniSMDC050F-2
0.5 A
Resettable
Raychem
SMT fuse on back-plane underneath
back cover plate. Used by fan.
CONSOLE MODULE RACK
Qty.
PSU/Fan
Fuse Part Number
Rating
Fuse Type
Manufacturer
Comments
1
120 VAC
240 VAC
GMD-1-R
1 A
Metric Time
Delay
Bussmann
Located at the top of the module on
the backplane.
This fuse protects the primary AC or
DC voltage input.
1
12 VDC Fan
miniSMDC050F-2
0.5 A
Resettable
Raychem
SMT fuse on back-plane underneath
back cover plate. Used by fan.
CARDS
Card
Type
Card
Fuse
Qty.
Fuse P/N
Current
Rating
Comments
FMB
FMB-X-2.5
1
0452003
3.0A
SMT fuse to protect on-board +5VDC (F3)
2
0452.500
0.5A
SMT fuse to protect on-board +/-12VDC (F1/F2)
Video
VIB-X
1
0452003
3.0A
SMT fuse to protect on-board +5VDC (F1)
1
0452001
1.0A
SMT fuse to protect on-board -12VDC (F2)
Video &
Data
HDB-TX
2
0452.500
0.5A
SMT fuse to protect on-board +12VDC (F2) and -12VDC (F3)
1
0452003
3.0A
SMT fuse to protect on-board +5VDC (F1)
Data
AIB-4
1
0452001
1.0A
SMT fuse to protect on-board +5VDC (F17)
2
0452.500
0.5A
SMT fuse to protect on-board +/-12VDC (F19/F20)
15
0451.250
0.25A
SMT fuse (with fuse holder) for i/o protection (F1-F16). Spare
on-board fuse (F18).
NOTES:
1. SMT = Surface Mount Technology
2. All 250mA, fast-response fuses are installed in SMT fuse holders. Remove fuses gently with a small pair of needle-nose pliers
and slowly lift directly upwards. All power supply rail protection fuses are soldered directly to the PCB and, if blown, should only
be replaced by the factory during repair of the board.
3. 0451 and 0452 type fuses are manufactured by Littelfuse.
4. 0452 type SMT fuses are time delay fuses.
5. 0451 type SMT fuses are fast acting fuses.
6. The parts listed in this appendix might become obsolete in the future. Please contact the factory for advice on replacement
parts.
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