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 535-9098
製造零件編號LM334Z/NOPB
TWD31.20
/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 779-9615
製造零件編號LT3092EST#PBF
TWD161.50
/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 121-8833
製造零件編號LM334Z/NOPB
TWD13.30
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 253-780
製造零件編號E-202
BrandSEMITEC
TWD78.40
/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 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
TWD78.40
/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 253-803
製造零件編號E-352
BrandSEMITEC
TWD78.40
/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 165-8354
製造零件編號AP2502KTR-G1
TWD4.40
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 921-0477
製造零件編號AP2502KTR-G1
TWD12.60
/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 693-4031
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 693-4035
製造零件編號S-123T
BrandSEMITEC
TWD75.80
/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 921-6813
製造零件編號LM234Z-6/NOPB
TWD41.30
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 761-5476
製造零件編號LM234Z-6/NOPB
TWD47.40
/個 (每包:5個)
單位
Single 10mA 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 168-9539
製造零件編號AL5809-30QP1-7
TWD7.30
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 253-831
製造零件編號E-822
BrandSEMITEC
TWD78.40
/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 170-4833
製造零件編號PSSI2021SAY,115
BrandNexperia
TWD4.20
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 121-8832
製造零件編號LM334M/NOPB
TWD33.60
毎管:95 個
單位
Single 10mA 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 535-9082
製造零件編號LM334M/NOPB
TWD37.00
/個 (每包:5個)
單位
Single 10mA 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 168-9536
製造零件編號AL5809-120QP1-7
TWD8.20
個 (在毎卷:3000)
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 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