delabs Circuits

Showing posts with label resistors. Show all posts
Showing posts with label resistors. Show all posts

Thursday, March 30, 2006

Resistors and How they Work

Resistors start from Wires to Wirewound Types. Carbon Film Resistors are most Common, Metal Film Resistors are more stable and accurate. We have now SMD types with lower power some are Laser Trimmed Types for accurate values. Resistors Arrays are used in Digital Circuits.

Types of Resistors - Color code and Other Resources

1/4 W Resistors have a Voltage rating of around 200-250V. Even when using a High value like 1 Meg use two in series when it is across Mains 230 V AC. 470K + 470K - you get around a Meg at 500V Rating.

1/4W Metal Resistors Riedon MFR Resistor Networks Audio Gold LVC Ser LVC-1
Futurlec Riedon Caddock Ohmite Ohmite
1/4W Metal Film Resistors.
High stability
Solid construction
1% tolerance
1R to 10M
1 Ohm to 10 Meg Ohm
Tolerance to ± 0.05%
Low Temp. Coeff.
TC ± 3ppm/°C
Very Low Inductance
Matched Sets Available
39 standard models
Type 1776
precision resistor networks
Absolute Tolerance
Absolute T-Coeff
3 watt to 50 watts
Non-inductive available
Reduces signal distortion
Minimizes thermal EMI
Standard Sizes
Terminal Barrier Resists Ag Migration
-55°C- +125°C
Auto Insertion
1% MFR
tight tolerances
Highly stable
low noise
low temp-coeff
demanding applications
minimum tolerances
long-term stability
3, 4, and 5 - decade voltage dividers
10:1 - 10,000:1
1,200 volts continuous
overvoltage to 2KV
wire wound
ceramic core
high-end loudspeaker
amplifier applications
low value
chip resistors
current sense applications
low profile, cost

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