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. 822-5869
Mfr. Part No.LT3092IST#PBF
HK$36.565
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
RS Stock No. 253-831
Mfr. Part No.E-822
BrandSEMITEC
HK$9.358
Each (In a Pack of 5)
units
Single - 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
RS Stock No. 693-4013
Mfr. Part No.S-153T
BrandSEMITEC
HK$6.443
Each (In a Pack of 10)
units
Single 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
RS Stock No. 858-0898
Mfr. Part No.LT3092ETS8#TRMPBF
HK$33.298
Each (In a Pack of 5)
units
Single - 1 40V - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm 2.9mm 1.75mm 0.9mm +125 °C
RS Stock No. 826-9288
Mfr. Part No.BCR410WH6327XTSA1
BrandInfineon
HK$1.044
Each (In a Pack of 100)
units
Single - 1 - - - Surface Mount SOT-343 4 2 x 1.25 x 0.8mm 2mm 1.25mm 0.8mm +150 °C
RS Stock No. 253-847
Mfr. Part No.E-123
BrandSEMITEC
HK$9.284
Each (In a Pack of 5)
units
Single - 1 30V 0.08MΩ 3.8V Through Hole - 2 3.9 x 1.8 x 1.8mm 3.9mm 1.8mm 1.8mm +150 °C
RS Stock No. 824-6831
Mfr. Part No.LM334SM/NOPB
HK$20.33
Each (In a Pack of 5)
units
Single - 1 40V - - Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm +70 °C
RS Stock No. 779-9615
Mfr. Part No.LT3092EST#PBF
HK$30.13
Each (In a Pack of 2)
units
Single - 1 - - - Surface Mount SOT-223 3 + Tab 6.71 x 3.71 x 1.8mm 6.71mm 3.71mm 1.8mm +125 °C
RS Stock No. 133-3331
Mfr. Part No.AL5809-120QP1-7
HK$4.122
Each (In a Pack of 20)
units
Single - 1 60V - - Surface Mount PDI123 2 3 x 1.93 x 1mm 3mm 1.93mm 1mm +150 °C
RS Stock No. 165-5616
Mfr. Part No.BCR410WH6327XTSA1
BrandInfineon
HK$0.875
Each (On a Reel of 3000)
units
Single - 1 - - - Surface Mount SOT-343 4 2 x 1.25 x 0.8mm 2mm 1.25mm 0.8mm +150 °C
RS Stock No. 170-4833
Mfr. Part No.PSSI2021SAY,115
BrandNexperia
HK$1.063
Each (On a Reel of 3000)
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. 156-5698
Mfr. Part No.LT3092ETS8#TRMPBF
HK$26.461
Each (On a Reel of 500)
units
Single - 1 40V - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm 2.9mm 1.75mm 0.9mm +125 °C
RS Stock No. 133-3334
Mfr. Part No.AL5809-30QP1-7
HK$3.206
Each (In a Pack of 20)
units
Single - 1 60V - - Surface Mount PDI123 2 3 x 1.93 x 1mm 3mm 1.93mm 1mm +150 °C
RS Stock No. 822-5901
Mfr. Part No.LT3092IDD#PBF
HK$31.07
Each (In a Pack of 2)
units
Single - 1 - - - Surface Mount DFN 8 3 x 3 x 0.75mm 3mm 3mm 0.75mm +125 °C
RS Stock No. 920-0060
Mfr. Part No.LT3092IST#PBF
HK$26.154
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. 921-0477
Mfr. Part No.AP2502KTR-G1
HK$2.082
Each (In a Pack of 30)
units
Single - 1 6V - - Surface Mount SOT-23 6 3.02 x 1.7 x 1.3mm 3.02mm 1.7mm 1.3mm +85 °C
RS Stock No. 168-9536
Mfr. Part No.AL5809-120QP1-7
HK$2.811
Each (On a Reel of 3000)
units
Single - 1 60V - - Surface Mount PDI123 2 3 x 1.93 x 1mm 3mm 1.93mm 1mm +150 °C
RS Stock No. 165-8354
Mfr. Part No.AP2502KTR-G1
HK$1.15
Each (On a Reel of 3000)
units
Single - 1 6V - - Surface Mount SOT-23 6 3.02 x 1.7 x 1.3mm 3.02mm 1.7mm 1.3mm +85 °C
RS Stock No. 133-3345
Mfr. Part No.BCR421UW6Q-7
HK$2.287
Each (In a Pack of 20)
units
Single - 1 40V - - Surface Mount SOT-26 6 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm +150 °C
RS Stock No. 253-819
Mfr. Part No.E-452
BrandSEMITEC
HK$8.59
Each (In a Pack of 5)
units
Single - 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
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