Model 10811A/B
6-7. Component Parts and Materials
6-8. Generally, the prefix of HP part numbers identifies the type of device. Eight-digit part numbers are
used, where the four-digit prefix identifies the type of component, part, or material and the four-digit suffix
indicates the specific type. Following is a list of some of the more commonly used prefixes for component
parts. The list includes HP manufactured parts and purchased parts.
Prefix Component Part Material
0121- Capacitors, Variable (mechanical)
0122- Capacitors, Voltage Variable (semiconductor)
0140- Capacitors, Fixed
0150- Capacitors, Fixed,
0160- Capacitors, Fixed
0180- Capacitors, Fixed Electrolytic
0330- Insulating Materials
0340- Insulators, Formed
0370- Knobs, Control
0380- Crystals
0470- Adhesives
0490- Relays
0510- Fasteners
0674- through 0778- Resistors, Fixed (non wire wound)
0811- through 0831- Resistors (wire wound)
1200- Sockets for components
1205- Heat Sinks
1250- Connectors (RF and related parts)
1251- Connectors (non RF and related parts)
1410- Bearings and Bushings
1420- Batteries
1820- Monolithic Digital Integrated Circuits
1826- Monolithic Linear Integrated Circuits
1850- Transistors, Germanium PNP
1851- Transistors, Germanium NPN
1853- Transistors, Silicon PNP
1854- Transistors, Silicon NPN
1855- Field-Effect- Transistors
1900- through 1912- Diodes
1920- through 1952- Vacuum Tubes
1990- Semiconductor Photosensitive and Light-emitting Diodes
3100- through 3106- Switches
8120- Cables
9100- Transformers, Coils, Chokes, Inductors, and Filters
6-9. For example, 1854-0037, 1854-0221 and 1851-0192 are all NPN transistors. The first two are
silicon and the last is germanium.
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