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.


...
Read more Read less

Filters

Viewing 1 - 20 of 29 products
Results per page
Description Price Diode Configuration Maximum Regulator Current Number of Elements per Chip Maximum Peak Operating Voltage Maximum Limiting Voltage Mounting Type Package Type Pin Count Dimensions Length Width Height Maximum Operating Temperature Minimum Operating Temperature
RS Stock No. 461-9434
Mfr. Part No.REF200AU
£6.94
Each
Units
Complex Array - 3 - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm +85 °C -40 °C
RS Stock No. 145-0208
Mfr. Part No.LT3092EST#PBF
£2.794
Each (In a Tube of 78)
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 -40 °C
RS Stock No. 779-9615
Mfr. Part No.LT3092EST#PBF
£3.395
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 -40 °C
RS Stock No. 826-9288
Mfr. Part No.BCR410WH6327XTSA1
BrandInfineon
£0.058
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. 165-5616
Mfr. Part No.BCR410WH6327XTSA1
BrandInfineon
£0.057
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. 858-0898
Mfr. Part No.LT3092ETS8#TRMPBF
£3.504
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 -40 °C
RS Stock No. 156-5698
Mfr. Part No.LT3092ETS8#TRMPBF
£1.962
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 -40 °C
RS Stock No. 921-0477
Mfr. Part No.AP2502KTR-G1
£0.284
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 -40 °C
RS Stock No. 165-8354
Mfr. Part No.AP2502KTR-G1
£0.098
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 -40 °C
RS Stock No. 921-6819
Mfr. Part No.LM234Z-3/NOPB
£1.019
Each (On a Reel 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 -25 °C
RS Stock No. 761-5472
Mfr. Part No.LM234Z-3/NOPB
£2.152
Each (In a Pack of 5)
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 -25 °C
RS Stock No. 168-9540
Mfr. Part No.AL5809-50QP1-7
£0.15
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 -40 °C
RS Stock No. 133-3335
Mfr. Part No.AL5809-50QP1-7
£0.155
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 -40 °C
RS Stock No. 162-8581
Mfr. Part No.LM334SM/NOPB
£1.881
Each (In a Tube of 95)
Units
Single - 1 40V - Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm +70 °C 0 °C
RS Stock No. 824-6831
Mfr. Part No.LM334SM/NOPB
£2.068
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 0 °C
RS Stock No. 168-9536
Mfr. Part No.AL5809-120QP1-7
£0.179
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 -40 °C
RS Stock No. 133-3331
Mfr. Part No.AL5809-120QP1-7
£0.373
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 -40 °C
RS Stock No. 133-3334
Mfr. Part No.AL5809-30QP1-7
£0.343
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 -40 °C
RS Stock No. 168-9539
Mfr. Part No.AL5809-30QP1-7
£0.158
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 -40 °C
RS Stock No. 822-5869
Mfr. Part No.LT3092IST#PBF
£4.085
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 -40 °C
Related Products
EXAR PowerBlox™ synchronous step-down switching regulators offer high ...
Description:
EXAR PowerBlox™ synchronous step-down switching regulators offer high efficiency in compact space-saving packages. They feature a wide input voltage range of 4.5 to 22V, allowing single supply operation from industry standard 5, 12 & 19.6V power rails. A constant on-time (COT) emulated current mode control scheme allows extremely fast line ...
The Linear LED Drivers provide a simple and ...
Description:
The Linear LED Drivers provide a simple and effective solution to driving low-current, high-brightness LEDs.
Programmable 2-Terminal Current Source200 mA Maximum Output Current1.2 ...
Description:
Programmable 2-Terminal Current Source200 mA Maximum Output Current1.2 V to 40 V Wide Input Voltage RangeInput/Output Capacitors Not RequiredResistor Ratio Sets Output Current.
Integrated solutions to save board space. Incorporating a ...
Description:
Integrated solutions to save board space. Incorporating a resistor-equipped PNP transistor with two diodes on one chip, our dedicated constant current source device is housed in a SOT353 package. Reducing board space and component count, it provides stabilized output current of between 15 μA and 50 mA. The device is ...