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 253-796
製造零件編號E-272
BrandSEMITEC
HK$9.358
/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 693-4025
製造零件編號S-562T
BrandSEMITEC
HK$6.443
/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$10.678
/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 253-724
製造零件編號E-101
BrandSEMITEC
HK$12.80
/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
RS庫存編號 693-4031
製造零件編號S-103T
BrandSEMITEC
HK$4.046
/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 253-746
製造零件編號E-501
BrandSEMITEC
HK$9.614
/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 461-9434
製造零件編號REF200AU
HK$68.10
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 253-780
製造零件編號E-202
BrandSEMITEC
HK$10.678
/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 464-5326
製造零件編號E-153
BrandSEMITEC
HK$9.38
/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 170-5384
製造零件編號PSSI2021SAY,115
BrandNexperia
HK$2.85
/個 (每包:25個)
單位
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庫存編號 919-9238
製造零件編號LT3092ITS8TRMPBF
HK$25.28
個 (在毎卷:500)
單位
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庫存編號 921-0477
製造零件編號AP2502KTR-G1
HK$2.082
/個 (每包:30個)
單位
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庫存編號 920-0060
製造零件編號LT3092IST#PBF
HK$26.154
毎管:78 個
單位
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庫存編號 168-9536
製造零件編號AL5809-120QP1-7
HK$2.811
個 (在毎卷:3000)
單位
Single - 1 60V - - Surface Mount PDI123 2 3 x 1.93 x 1mm 3mm 1.93mm 1mm +150 °C
RS庫存編號 253-831
製造零件編號E-822
BrandSEMITEC
HK$9.358
/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 826-9288
製造零件編號BCR410WH6327XTSA1
BrandInfineon
HK$1.044
/個 (每包:100個)
單位
Single - 1 - - - Surface Mount SOT-343 4 2 x 1.25 x 0.8mm 2mm 1.25mm 0.8mm +150 °C
RS庫存編號 824-6831
製造零件編號LM334SM/NOPB
HK$20.33
/個 (每包:5個)
單位
Single - 1 40V - - Surface Mount SOIC 8 5 x 4 x 1.5mm 5mm 4mm 1.5mm +70 °C
RS庫存編號 253-847
製造零件編號E-123
BrandSEMITEC
HK$9.284
/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 170-4833
製造零件編號PSSI2021SAY,115
BrandNexperia
HK$1.063
個 (在毎卷:3000)
單位
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庫存編號 133-3334
製造零件編號AL5809-30QP1-7
HK$3.206
/個 (每包:20個)
單位
Single - 1 60V - - Surface Mount PDI123 2 3 x 1.93 x 1mm 3mm 1.93mm 1mm +150 °C