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 Diode Configuration 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
RS Stock No. 253-768
Mfr. Part No.E-102
BrandSEMITEC
PHP110.932
Each (In a Pack of 5)
units
Single - 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
RS Stock No. 535-9098
Mfr. Part No.LM334Z/NOPB
PHP42.11
Each (In a Pack of 5)
units
Single 10mA 1 40V - - Through Hole TO-92 3 5.2 x 4.19 x 5.2mm 5.2mm 4.19mm 5.2mm +70 °C
RS Stock No. 121-8833
Mfr. Part No.LM334Z/NOPB
PHP19.074
Each (In a Box of 1800)
units
Single - 1 40V - - Through Hole TO-92 3 5.2 x 4.19 x 5.2mm 5.2mm 4.19mm 5.2mm +70 °C
RS Stock No. 253-803
Mfr. Part No.E-352
BrandSEMITEC
PHP110.932
Each (In a Pack of 5)
units
Single - 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
RS Stock No. 253-796
Mfr. Part No.E-272
BrandSEMITEC
PHP110.932
Each (In a Pack of 5)
units
Single - 1 100V 0.15MΩ 2.7V Through Hole - 2 3.9 x 1.8 x 1.8mm 3.9mm 1.8mm 1.8mm +150 °C
RS Stock No. 121-8832
Mfr. Part No.LM334M/NOPB
PHP42.205
Each (In a Tube of 95)
units
Single - 1 40V - - Surface Mount SOIC 8 4.9 x 3.9 x 1.45mm 4.9mm 3.9mm 1.45mm +70 °C
RS Stock No. 253-825
Mfr. Part No.E-562
BrandSEMITEC
PHP110.932
Each (In a Pack of 5)
units
Single - 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
RS Stock No. 465-0003
Mfr. Part No.E-103
BrandSEMITEC
PHP110.932
Each (In a Pack of 5)
units
Single - 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
RS Stock No. 535-9082
Mfr. Part No.LM334M/NOPB
PHP49.932
Each (In a Pack of 5)
units
Single - 1 40V - - Surface Mount SOIC 8 4.9 x 3.9 x 1.45mm 4.9mm 3.9mm 1.45mm +70 °C
RS Stock No. 464-5326
Mfr. Part No.E-153
BrandSEMITEC
PHP110.932
Each (In a Pack of 5)
units
Single - 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
RS Stock No. 693-4022
Mfr. Part No.S-183T
BrandSEMITEC
PHP109.488
Each (In a Pack of 10)
units
Single 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
RS Stock No. 693-4031
Mfr. Part No.S-103T
BrandSEMITEC
PHP109.488
Each (In a Pack of 10)
units
Single 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
RS Stock No. 253-746
Mfr. Part No.E-501
BrandSEMITEC
PHP110.932
Each (In a Pack of 5)
units
Single - 1 100V 2MΩ 1.1V Through Hole - 2 3.9 x 1.8 x 1.8mm 3.9mm 1.8mm 1.8mm +150 °C
RS Stock No. 253-780
Mfr. Part No.E-202
BrandSEMITEC
PHP110.932
Each (In a Pack of 5)
units
Single - 1 100V 0.25MΩ 2.3V Through Hole - 2 3.9 x 1.8 x 1.8mm 3.9mm 1.8mm 1.8mm +150 °C
RS Stock No. 170-5384
Mfr. Part No.PSSI2021SAY,115
BrandNexperia
PHP15.514
Each (In a Pack of 25)
units
Single 50mA 2 75V - 73V Surface Mount SC-88A 5 2.2 x 1.35 x 1mm 2.2mm 1.35mm 1mm +150 °C
RS Stock No. 921-6813
Mfr. Part No.LM234Z-6/NOPB
PHP38.808
Each (In a Tube of 1800)
units
Single - 1 40V - - Through Hole TO-92 3 5.2 x 4.19 x 5.2mm 5.2mm 4.19mm 5.2mm +100 °C
RS Stock No. 155-7505
Mfr. Part No.LT3092IDD#PBF
PHP134.891
Each (In a Tube of 121)
units
Single - 1 - - - Surface Mount DFN 8 3 x 3 x 0.75mm 3mm 3mm 0.75mm +125 °C
RS Stock No. 761-8627
Mfr. Part No.LT3092ITS8#TRMPBF
PHP223.48
Each
units
Single - 1 40V - - Surface Mount SOT-23 8 2.9 x 1.75 x 0.9mm 2.9mm 1.75mm 0.9mm +125 °C
RS Stock No. 920-0060
Mfr. Part No.LT3092IST#PBF
PHP141.44
Each (In a Tube of 78)
units
Single - 1 - - - Surface Mount SOT-223 3 + Tab 6.71 x 3.71 x 1.6984mm 6.71mm 3.71mm 1.698mm +125 °C
RS Stock No. 822-5869
Mfr. Part No.LT3092IST#PBF
PHP229.665
Each (In a Pack of 2)
units
Single - 1 - - - Surface Mount SOT-223 3 + Tab 6.71 x 3.71 x 1.6984mm 6.71mm 3.71mm 1.698mm +125 °C
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