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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Description Price 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 Stock No. 921-6813
Mfr. Part No.LM234Z-6/NOPB
kr 5,47
Each (In a Tube of 1800)
Units
- 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 Stock No. 761-5476
Mfr. Part No.LM234Z-6/NOPB
kr 11,506
Each (In a Pack of 5)
Units
- 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 Stock No. 761-8627
Mfr. Part No.LT3092ITS8#TRMPBF
kr 43,67
Each
Units
- 1 40V - - Surface Mount SOT-23 8 2.9 x 1.75 x 0.9mm 2.9mm 1.75mm 0.9mm +125 °C -40 °C
RS Stock No. 133-3335
Mfr. Part No.AL5809-50QP1-7
kr 3,694
Each (In a Pack of 20)
Units
- 1 60V - - Surface Mount PDI123 2 3 x 1.93 x 1mm 3mm 1.93mm 1mm +150 °C -40 °C
RS Stock No. 761-5472
Mfr. Part No.LM234Z-3/NOPB
kr 23,708
Each (In a Pack of 5)
Units
- 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 Stock No. 168-9540
Mfr. Part No.AL5809-50QP1-7
kr 3,236
Each (On a Reel of 3000)
Units
- 1 60V - - Surface Mount PDI123 2 3 x 1.93 x 1mm 3mm 1.93mm 1mm +150 °C -40 °C
RS Stock No. 535-9098
Mfr. Part No.LM334Z/NOPB
kr 7,498
Each (In a Pack of 5)
Units
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 Stock No. 921-6819
Mfr. Part No.LM234Z-3/NOPB
kr 12,111
Each (On a Reel of 1800)
Units
- 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 Stock No. 121-8833
Mfr. Part No.LM334Z/NOPB
kr 3,621
Each (In a Box of 1800)
Units
- 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 Stock No. 921-0477
Mfr. Part No.AP2502KTR-G1
kr 3,413
Each (In a Pack of 30)
Units
- 1 6V - - Surface Mount SOT-23 6 3.02 x 1.7 x 1.3mm 3.02mm 1.7mm 1.3mm +85 °C -40 °C
RS Stock No. 165-8354
Mfr. Part No.AP2502KTR-G1
kr 1,172
Each (On a Reel of 3000)
Units
- 1 6V - - Surface Mount SOT-23 6 3.02 x 1.7 x 1.3mm 3.02mm 1.7mm 1.3mm +85 °C -40 °C
RS Stock No. 168-9536
Mfr. Part No.AL5809-120QP1-7
kr 3,659
Each (On a Reel of 3000)
Units
- 1 60V - - Surface Mount PDI123 2 3 x 1.93 x 1mm 3mm 1.93mm 1mm +150 °C -40 °C
RS Stock No. 133-3334
Mfr. Part No.AL5809-30QP1-7
kr 3,694
Each (In a Pack of 20)
Units
- 1 60V - - Surface Mount PDI123 2 3 x 1.93 x 1mm 3mm 1.93mm 1mm +150 °C -40 °C
RS Stock No. 168-9550
Mfr. Part No.BCR421UW6Q-7
kr 1,971
Each (On a Reel of 3000)
Units
- 1 40V - - Surface Mount SOT-26 6 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm +150 °C -55 °C
RS Stock No. 133-3345
Mfr. Part No.BCR421UW6Q-7
kr 2,802
Each (In a Pack of 20)
Units
- 1 40V - - Surface Mount SOT-26 6 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm +150 °C -55 °C
RS Stock No. 920-0060
Mfr. Part No.LT3092IST#PBF
kr 27,293
Each (In a Tube of 78)
Units
- 1 - - - Surface Mount SOT-223 3 + Tab 6.71 x 3.71 x 1.6984mm 6.71mm 3.71mm 1.698mm +125 °C -40 °C
RS Stock No. 133-3331
Mfr. Part No.AL5809-120QP1-7
kr 4,063
Each (In a Pack of 20)
Units
- 1 60V - - Surface Mount PDI123 2 3 x 1.93 x 1mm 3mm 1.93mm 1mm +150 °C -40 °C
RS Stock No. 168-9539
Mfr. Part No.AL5809-30QP1-7
kr 3,236
Each (On a Reel of 3000)
Units
- 1 60V - - Surface Mount PDI123 2 3 x 1.93 x 1mm 3mm 1.93mm 1mm +150 °C -40 °C
RS Stock No. 822-5869
Mfr. Part No.LT3092IST#PBF
kr 48,755
Each (In a Pack of 2)
Units
- 1 - - - Surface Mount SOT-223 3 + Tab 6.71 x 3.71 x 1.6984mm 6.71mm 3.71mm 1.698mm +125 °C -40 °C
RS Stock No. 858-0898
Mfr. Part No.LT3092ETS8#TRMPBF
kr 43,03
Each (In a Pack of 5)
Units
- 1 40V - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm 2.9mm 1.75mm 0.9mm +125 °C -40 °C
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