Constant Current Diodes

A constant current diode, also called a current limiting diode (CLD), is an electronic device that regulates or limits current to a maximum value. This is important as it protects your circuit from harmful effects in the event of a short-circuit.

How do constant current diodes work?

Constant current diodes are made from a junction field effect transistor, the simplest type of three-terminal semiconductor transistor which functions like a current limiter. They allow the current running through them to rise to a certain point and level off at a specific value. Unlike zener diodesconstant current diodes maintain a constant current instead of the constant voltage.

Applications for constant current diodes

Constant current diodes can be used in several circuit applications. Examples of devices using constant current diodes include waveform generator circuits, timing circuits and battery chargers. Constant current diodes can also be used as a constant current source for LED driversand can be used to replace holding coils in telephone connection devices.


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Omschrijving Prijs Maximum Regulator Current Number of Elements per Chip Maximum Peak Operating Voltage Minimum Dynamic Impedance Maximum Limiting Voltage Mounting Type Package Type Pin Count Dimensions Length Width Height Maximum Operating Temperature Minimum Operating Temperature
RS-stocknr. 535-9098
FabrikantnummerLM334Z/NOPB
0,752 €
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10mA 1 40V - - Through Hole TO-92 3 5.2 x 4.19 x 5.2mm 5.2mm 4.19mm 5.2mm +70 °C 0 °C
RS-stocknr. 121-8833
FabrikantnummerLM334Z/NOPB
0,35 €
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Aantal stuks
- 1 40V - - Through Hole TO-92 3 5.2 x 4.19 x 5.2mm 5.2mm 4.19mm 5.2mm +70 °C 0 °C
RS-stocknr. 921-6813
FabrikantnummerLM234Z-6/NOPB
0,543 €
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Aantal stuks
- 1 40V - - Through Hole TO-92 3 5.2 x 4.19 x 5.2mm 5.2mm 4.19mm 5.2mm +100 °C -25 °C
RS-stocknr. 761-5476
FabrikantnummerLM234Z-6/NOPB
1,242 €
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- 1 30V - - Through Hole TO-92 3 5.2 x 4.19 x 5.2mm 5.2mm 4.19mm 5.2mm +100 °C -25 °C
RS-stocknr. 535-9082
FabrikantnummerLM334M/NOPB
0,926 €
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- 1 40V - - Surface Mount SOIC 8 4.9 x 3.9 x 1.45mm 4.9mm 3.9mm 1.45mm +70 °C 0 °C
RS-stocknr. 121-8832
FabrikantnummerLM334M/NOPB
1,029 €
Each (In a Tube of 95)
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- 1 40V - - Surface Mount SOIC 8 4.9 x 3.9 x 1.45mm 4.9mm 3.9mm 1.45mm +70 °C 0 °C
RS-stocknr. 761-5472
FabrikantnummerLM234Z-3/NOPB
2,378 €
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- 1 40V - - Through Hole TO-92 3 5.2 x 4.19 x 5.2mm 5.2mm 4.19mm 5.2mm +100 °C -25 °C
RS-stocknr. 921-6819
FabrikantnummerLM234Z-3/NOPB
1,201 €
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- 1 40V - - Through Hole TO-92 3 5.2 x 4.19 x 5.2mm 5.2mm 4.19mm 5.2mm +100 °C -25 °C
RS-stocknr. 197-7487
FabrikantnummerREF200AU
7,70 €
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100µA 3 40V 500MΩ 40V - SOIC 8 - - - - - -
RS-stocknr. 197-7486
FabrikantnummerREF200AU
6,623 €
Each (In a Tube of 75)
Aantal stuks
100µA 3 40V 500MΩ 40V - SOIC 8 - - - - - -