VTL5C3 Vactrol

Code: N72EH

  • A single vactrol for use in amplifiers or analogue synthesisers
  • Uses an LED and LDR to control the resistance in a circuit
  • 75 dB dynamic range and high dark resistance

Product details

VTL5C3 Vactrol

• A single vactrol for use in amplifiers or analogue synthesisers
• Uses an LED and LDR to control the resistance in a circuit
• 75 dB dynamic range and high dark resistance
• Fast response time – typically 2.5 ms

What is a vactrol?
A vactrol (or resistive opto-isolator) is an electrical component that consists of a light emitting diode (LED) and a light dependant resistor (LDR or photoresistor). When the voltage passes across the LED, the resistance of the LDR changes. This means that you can control the resistance in a circuit by altering the voltage to your vactrol’s LED.

What can I use this vactrol for?
Vactrols can be used in guitar amplifiers, analogue synthesisers and amateur (HAM) radio systems. As the input current increases, the output resistance decreases. The VTL5C3 has a good 75dB dynamic range and a low temperature coefficient of resistance. The VTL5C3 has a fast response time typically 2.5ms (maximum 35ms) with a small light history memory.

Specifications
Cell power 175 mW
Cell Voltage 250 V
Forward voltage drop 2 V @ 20 mA
Reverse Breakdown voltage 3 V
LED Current 40 mA
Resistance 30k Ohm @ 1mA
5 Ohm @ 10 mA
1.5 Ohm @ 40 mA
Dynamic range 75 dB
Output cell capacitance 5.0 pF
Typical response time 2.5 ms
Max Response time 35 ms
Width 9.91 mm
Depth 8.13 mm
Height 9.9 mm

Bulk Prices

Item code Item name Quantity Price
N72EH VTL5C3 Vactrol (1+) £4.96

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