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 121-8833
製造零件編號LM334Z/NOPB
TWD13.40
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 779-9615
製造零件編號LT3092EST#PBF
TWD141.00
/個 (每包:2個)
單位
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庫存編號 535-9098
製造零件編號LM334Z/NOPB
TWD19.40
/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 145-0208
製造零件編號LT3092EST#PBF
TWD103.10
毎管:78 個
單位
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庫存編號 253-780
製造零件編號E-202
BrandSEMITEC
TWD28.60
/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 461-9434
製造零件編號REF200AU
TWD210.00
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 165-8354
製造零件編號AP2502KTR-G1
TWD4.50
個 (在毎卷:3000)
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 253-803
製造零件編號E-352
BrandSEMITEC
TWD27.20
/個 (每包:5個)
單位
Single - 1 100V 0.1MΩ 3.2V Through Hole - 2 3.9 x 1.8 x 1.8mm 3.9mm 1.8mm 1.8mm +150 °C
RS庫存編號 921-0477
製造零件編號AP2502KTR-G1
TWD5.90
/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 693-4029
製造零件編號L-1822
BrandSEMITEC
TWD152.00
1 包 5 套
Pack(s)
- 22mA - 30V - 3.9V Through Hole - 2 10.5 x 4.1 x 9.8mm 10.5mm 4.1mm 9.8mm +150 °C
RS庫存編號 253-819
製造零件編號E-452
BrandSEMITEC
TWD37.00
/個 (每包:5個)
單位
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
RS庫存編號 693-4022
製造零件編號S-183T
BrandSEMITEC
TWD14.40
/個 (每包:10個)
單位
Single 20mA 1 40V - 4.6V 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 253-730
製造零件編號E-301
BrandSEMITEC
TWD37.00
/個 (每包:5個)
單位
Single - 1 100V 4MΩ 0.8V 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
TWD16.00
/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 121-8832
製造零件編號LM334M/NOPB
TWD14.90
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 253-847
製造零件編號E-123
BrandSEMITEC
TWD37.00
/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 919-9238
製造零件編號LT3092ITS8TRMPBF
TWD99.50
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 822-5869
製造零件編號LT3092IST#PBF
TWD168.50
/個 (每包:2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 156-5698
製造零件編號LT3092ETS8#TRMPBF
TWD102.40
個 (在毎卷:500)
單位
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庫存編號 133-3335
製造零件編號AL5809-50QP1-7
TWD15.30
/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