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. 253-730
Mfr. Part No.E-301
BrandSEMITEC
SGD3.234
Each (In a Pack of 5)
units
- 1 100V 4MΩ 0.8V Through Hole - 2 3.9 x 1.8 x 1.8mm 3.9mm 1.8mm 1.8mm +150 °C -30 °C
RS Stock No. 253-746
Mfr. Part No.E-501
BrandSEMITEC
SGD3.46
Each (In a Pack of 5)
units
- 1 100V 2MΩ 1.1V Through Hole - 2 3.9 x 1.8 x 1.8mm 3.9mm 1.8mm 1.8mm +150 °C -30 °C
RS Stock No. 535-9098
Mfr. Part No.LM334Z/NOPB
SGD1.294
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. 121-8833
Mfr. Part No.LM334Z/NOPB
SGD0.542
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. 253-768
Mfr. Part No.E-102
BrandSEMITEC
SGD3.46
Each (In a Pack of 5)
units
- 1 100V 0.65MΩ 1.7V Through Hole - 2 3.9 x 1.8 x 1.8mm 3.9mm 1.8mm 1.8mm +150 °C -30 °C
RS Stock No. 693-4031
Mfr. Part No.S-103T
BrandSEMITEC
SGD3.42
Each (In a Pack of 10)
units
12mA 1 50V - 3.5V Surface Mount SMD 2 2.6 x 1.6 x 0.7mm 2.6mm 1.6mm 0.7mm +150 °C -40 °C
RS Stock No. 253-825
Mfr. Part No.E-562
BrandSEMITEC
SGD3.234
Each (In a Pack of 5)
units
- 1 100V 0.04MΩ 4.5V Through Hole - 2 3.9 x 1.8 x 1.8mm 3.9mm 1.8mm 1.8mm +150 °C -30 °C
RS Stock No. 253-819
Mfr. Part No.E-452
BrandSEMITEC
SGD3.234
Each (In a Pack of 5)
units
- 1 100V 0.07MΩ 3.7V Through Hole - 2 3.9 x 1.8 x 1.8mm 3.9mm 1.8mm 1.8mm +150 °C -30 °C
RS Stock No. 693-4022
Mfr. Part No.S-183T
BrandSEMITEC
SGD3.195
Each (In a Pack of 10)
units
20mA 1 40V - 4.6V Surface Mount SMD 2 2.6 x 1.6 x 0.7mm 2.6mm 1.6mm 0.7mm +150 °C -40 °C
RS Stock No. 253-831
Mfr. Part No.E-822
BrandSEMITEC
SGD3.234
Each (In a Pack of 5)
units
- 1 30V 0.32MΩ 3.1V Through Hole - 2 3.9 x 1.8 x 1.8mm 3.9mm 1.8mm 1.8mm +150 °C -30 °C
RS Stock No. 464-5326
Mfr. Part No.E-153
BrandSEMITEC
SGD3.234
Each (In a Pack of 5)
units
- 1 25V 0.03MΩ 4.3V Through Hole - 2 3.9 x 1.8 x 1.8mm 3.9mm 1.8mm 1.8mm +150 °C -30 °C
RS Stock No. 779-9615
Mfr. Part No.LT3092EST#PBF
SGD6.45
Each (In a Pack of 2)
units
- 1 - - - Surface Mount SOT-223 3 + Tab 6.71 x 3.71 x 1.8mm 6.71mm 3.71mm 1.8mm +125 °C -40 °C
RS Stock No. 156-5698
Mfr. Part No.LT3092ETS8#TRMPBF
SGD3.742
Each (On a Reel of 500)
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
RS Stock No. 761-5476
Mfr. Part No.LM234Z-6/NOPB
SGD1.882
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. 145-0208
Mfr. Part No.LT3092EST#PBF
SGD3.695
Each (In a Tube of 78)
units
- 1 - - - Surface Mount SOT-223 3 + Tab 6.71 x 3.71 x 1.8mm 6.71mm 3.71mm 1.8mm +125 °C -40 °C
RS Stock No. 465-0003
Mfr. Part No.E-103
BrandSEMITEC
SGD3.234
Each (In a Pack of 5)
units
- 1 30V 0.17MΩ 3.5V Through Hole - 2 3.9 x 1.8 x 1.8mm 3.9mm 1.8mm 1.8mm +150 °C -30 °C
RS Stock No. 693-4013
Mfr. Part No.S-153T
BrandSEMITEC
SGD3.195
Each (In a Pack of 10)
units
18mA 1 50V - 4.3V Surface Mount SMD 2 2.6 x 1.6 x 0.7mm 2.6mm 1.6mm 0.7mm +150 °C -40 °C
RS Stock No. 858-0898
Mfr. Part No.LT3092ETS8#TRMPBF
SGD5.958
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
RS Stock No. 253-803
Mfr. Part No.E-352
BrandSEMITEC
SGD3.234
Each (In a Pack of 5)
units
- 1 100V 0.1MΩ 3.2V Through Hole - 2 3.9 x 1.8 x 1.8mm 3.9mm 1.8mm 1.8mm +150 °C -30 °C
RS Stock No. 921-6813
Mfr. Part No.LM234Z-6/NOPB
SGD0.895
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
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