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 121-8833
製造零件編號LM334Z/NOPB
TWD20.20
個 (以毎盒:1800)
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 779-9615
製造零件編號LT3092EST#PBF
TWD177.50
/個 (每包:2個)
單位
Single 200mA 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
TWD39.20
/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
TWD37.00
/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 165-8354
製造零件編號AP2502KTR-G1
TWD5.70
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 253-819
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 693-4029
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 921-0477
製造零件編號AP2502KTR-G1
TWD13.80
/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 253-803
製造零件編號E-352
BrandSEMITEC
TWD37.00
/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 761-5472
製造零件編號LM234Z-3/NOPB
TWD109.80
/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 +100 °C
RS庫存編號 465-0003
製造零件編號E-103
BrandSEMITEC
TWD37.00
/個 (每包:5個)
單位
Single - 1 30V 0.17MΩ 3.5V Through Hole - 2 3.9 x 1.8 x 1.8mm 3.9mm 1.8mm 1.8mm +150 °C
RS庫存編號 921-6819
製造零件編號LM234Z-3/NOPB
TWD60.20
個 (在毎卷:1800)
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 +100 °C
RS庫存編號 156-5698
製造零件編號LT3092ETS8#TRMPBF
TWD108.60
個 (在毎卷:500)
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 921-6813
製造零件編號LM234Z-6/NOPB
TWD51.20
毎管:1800 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 +100 °C
RS庫存編號 693-4025
製造零件編號S-562T
BrandSEMITEC
TWD49.50
/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 168-9540
製造零件編號AL5809-50QP1-7
TWD8.20
個 (在毎卷:3000)
單位
Single 50mA 1 60V - - Surface Mount PDI123 2 3 x 1.93 x 1mm 3mm 1.93mm 1mm +150 °C
RS庫存編號 919-9238
製造零件編號LT3092ITS8TRMPBF
TWD119.70
個 (在毎卷:500)
單位
Single 200mA 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 253-730
製造零件編號E-301
BrandSEMITEC
TWD32.80
/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 168-9539
製造零件編號AL5809-30QP1-7
TWD8.20
個 (在毎卷:3000)
單位
Single 30mA 1 60V - - Surface Mount PDI123 2 3 x 1.93 x 1mm 3mm 1.93mm 1mm +150 °C
RS庫存編號 693-4022
製造零件編號S-183T
BrandSEMITEC
TWD49.50
/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