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庫存編號 921-6813
製造零件編號LM234Z-6/NOPB
HK$5.38
毎管:1800 個
單位
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庫存編號 253-796
製造零件編號E-272
BrandSEMITEC
HK$24.298
/個 (每包:5個)
單位
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庫存編號 761-5476
製造零件編號LM234Z-6/NOPB
HK$10.578
/個 (每包:5個)
單位
Single - 1 30V - - Through Hole TO-92 3 5.2 x 4.19 x 5.2mm 5.2mm 4.19mm 5.2mm +100 °C
RS庫存編號 761-5472
製造零件編號LM234Z-3/NOPB
HK$19.782
/個 (每包:5個)
單位
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庫存編號 921-6819
製造零件編號LM234Z-3/NOPB
HK$10.931
個 (在毎卷:1800)
單位
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庫存編號 535-9082
製造零件編號LM334M/NOPB
HK$8.722
/個 (每包:5個)
單位
Single - 1 40V - - Surface Mount SOIC 8 4.9 x 3.9 x 1.45mm 4.9mm 3.9mm 1.45mm +70 °C
RS庫存編號 121-8832
製造零件編號LM334M/NOPB
HK$8.223
毎管:95 個
單位
Single - 1 40V - - Surface Mount SOIC 8 4.9 x 3.9 x 1.45mm 4.9mm 3.9mm 1.45mm +70 °C
RS庫存編號 693-4025
製造零件編號S-562T
BrandSEMITEC
HK$23.28
/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
RS庫存編號 253-825
製造零件編號E-562
BrandSEMITEC
HK$24.298
/個 (每包:5個)
單位
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庫存編號 464-5326
製造零件編號E-153
BrandSEMITEC
HK$23.59
/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 461-9434
製造零件編號REF200AU
HK$76.24
單位
Complex Array - 3 - - - Surface Mount SOIC 8 4.9 x 3.91 x 1.58mm 4.9mm 3.91mm 1.58mm +85 °C
RS庫存編號 535-9098
製造零件編號LM334Z/NOPB
HK$7.664
/個 (每包:5個)
單位
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庫存編號 253-780
製造零件編號E-202
BrandSEMITEC
HK$23.59
/個 (每包:5個)
單位
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庫存編號 253-746
製造零件編號E-501
BrandSEMITEC
HK$23.59
/個 (每包:5個)
單位
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庫存編號 121-8833
製造零件編號LM334Z/NOPB
HK$3.39
個 (以毎盒:1800)
單位
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庫存編號 693-4031
製造零件編號S-103T
BrandSEMITEC
HK$23.28
/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 253-724
製造零件編號E-101
BrandSEMITEC
HK$24.298
/個 (每包:5個)
單位
Single - 1 100V 6MΩ 0.5V Through Hole - 2 3.9 x 1.8 x 1.8mm 3.9mm 1.8mm 1.8mm +150 °C
全新
RS庫存編號 197-7487
製造零件編號REF200AU
HK$78.51
單位
Single 100µA 3 40V 500MΩ 40V - SOIC 8 - - - - -
RS庫存編號 253-831
製造零件編號E-822
BrandSEMITEC
HK$23.59
/個 (每包:5個)
單位
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庫存編號 133-3345
製造零件編號BCR421UW6Q-7
HK$2.93
/個 (每包:20個)
單位
Single - 1 40V - - Surface Mount SOT-26 6 3.1 x 1.7 x 1.3mm 3.1mm 1.7mm 1.3mm +150 °C