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 diodes constant 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 drivers and 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庫存編號 168-9550
製造零件編號BCR421UW6Q-7
TWD4.40
個 (在毎卷:3000)
單位
Single 10mA 1 40V - - Surface Mount SOT-26 6 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm +150 °C
RS庫存編號 464-5326
製造零件編號E-153
BrandSEMITEC
TWD78.40
/個 (每包:5個)
單位
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庫存編號 693-4013
製造零件編號S-153T
BrandSEMITEC
TWD77.30
/個 (每包:10個)
單位
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庫存編號 693-4035
製造零件編號S-123T
BrandSEMITEC
TWD77.30
/個 (每包:10個)
單位
Single 14.4mA 1 50V - 3.8V Surface Mount SMD 2 2.6 x 1.6 x 0.7mm 2.6mm 1.6mm 0.7mm +150 °C
RS庫存編號 858-0898
製造零件編號LT3092ETS8#TRMPBF
TWD145.80
/個 (每包:5個)
單位
Single 200mA 1 40V - - Surface Mount TSOT-23 8 2.9 x 1.75 x 0.9mm 2.9mm 1.75mm 0.9mm +125 °C
RS庫存編號 253-847
製造零件編號E-123
BrandSEMITEC
TWD78.40
/個 (每包:5個)
單位
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庫存編號 693-4031
製造零件編號S-103T
BrandSEMITEC
TWD77.30
/個 (每包:10個)
單位
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庫存編號 133-3331
製造零件編號AL5809-120QP1-7
TWD16.40
/個 (每包:20個)
單位
Single 120mA 1 60V - - Surface Mount PDI123 2 3 x 1.93 x 1mm 3mm 1.93mm 1mm +150 °C
RS庫存編號 133-3345
製造零件編號BCR421UW6Q-7
TWD13.30
/個 (每包:20個)
單位
Single 10mA 1 40V - - Surface Mount SOT-26 6 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm +150 °C
RS庫存編號 693-4025
製造零件編號S-562T
BrandSEMITEC
TWD77.30
/個 (每包:10個)
單位
Single 6.5mA 1 100V - 4.5V Surface Mount SMD 2 2.6 x 1.6 x 0.7mm 2.6mm 1.6mm 0.7mm +150 °C