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...

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Nexperia PSSI2021SAY,115 Constant Current Diode, 50mA, 73V max, 5-Pin SC-88A
Nexperia PSSI2021SAY,115 Constant Current Diode, 50mA, 73V max, 5-Pin SC-88A
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RS Stock No.: 170-4833Brand: NexperiaManufacturers Part No.: PSSI2021SAY,115

€ 405.73

€ 0.135 Each (On a Reel of 3000) (ex VAT)

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Nexperia
2
50mA
75V
73V
Surface Mount
SC-88A
5
2.2 x 1.35 x 1mm
2.2mm
1.35mm
1mm
+150 °C
-65 °C
DiodesZetex BCR421UW6Q-7 Constant Current Diode, 10mA, 6-Pin SOT-26
DiodesZetex BCR421UW6Q-7 Constant Current Diode, 10mA, 6-Pin SOT-26
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RS Stock No.: 133-3345Brand: DiodesZetexManufacturers Part No.: BCR421UW6Q-7

€ 3.93

€ 0.197 Each (In a Pack of 20) (ex VAT)

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DiodesZetex
1
10mA
40V
-
Surface Mount
SOT-26
6
3.1 x 1.7 x 1.3mm
3.1mm
1.7mm
1.3mm
+150 °C
-55 °C
Texas Instruments LM334Z/NOPB Constant Current Diode, 10mA, 3-Pin TO-92
Texas Instruments LM334Z/NOPB Constant Current Diode, 10mA, 3-Pin TO-92
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RS Stock No.: 535-9098Brand: Texas InstrumentsManufacturers Part No.: LM334Z/NOPB

€ 3.47

€ 0.693 Each (In a Pack of 5) (ex VAT)

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5€ 0.693
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Texas Instruments
1
10mA
40V
-
Through Hole
TO-92
3
5.2 x 4.19 x 5.2mm
5.2mm
4.19mm
5.2mm
+70 °C
0 °C
Texas Instruments LM234Z-3/NOPB Programmable Current Source, 10mA, 3-Pin TO-92
Texas Instruments LM234Z-3/NOPB Programmable Current Source, 10mA, 3-Pin TO-92
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RS Stock No.: 761-5472Brand: Texas InstrumentsManufacturers Part No.: LM234Z-3/NOPB

€ 11.59

€ 2.318 Each (In a Pack of 5) (ex VAT)

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Texas Instruments
1
10mA
40V
-
Through Hole
TO-92
3
5.2 x 4.19 x 5.2mm
5.2mm
4.19mm
5.2mm
+100 °C
-25 °C
DiodesZetex AL5809-30QP1-7 Constant Current Diode, 30mA, 2-Pin PDI123
DiodesZetex AL5809-30QP1-7 Constant Current Diode, 30mA, 2-Pin PDI123
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RS Stock No.: 133-3334Brand: DiodesZetexManufacturers Part No.: AL5809-30QP1-7

€ 5.09

€ 0.255 Each (In a Pack of 20) (ex VAT)

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DiodesZetex
1
30mA
60V
-
Surface Mount
PDI123
2
3 x 1.93 x 1mm
3mm
1.93mm
1mm
+150 °C
-40 °C
Texas Instruments REF200AU Constant Current Diode, 100μA, 40V max, 8-Pin SOIC
Texas Instruments REF200AU Constant Current Diode, 100μA, 40V max, 8-Pin SOIC
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RS Stock No.: 197-7486Brand: Texas InstrumentsManufacturers Part No.: REF200AU

€ 500.77

€ 6.677 Each (In a Tube of 75) (ex VAT)

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Texas Instruments
3
100µA
40V
40V
-
SOIC
8
-
-
-
-
-
-
DiodesZetex AL5809-50QP1-7 Constant Current Diode, 50mA, 2-Pin PDI123
DiodesZetex AL5809-50QP1-7 Constant Current Diode, 50mA, 2-Pin PDI123
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Also available in industry standard packaging
RS Stock No.: 133-3335Brand: DiodesZetexManufacturers Part No.: AL5809-50QP1-7

€ 8.71

€ 0.435 Each (In a Pack of 20) (ex VAT)

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DiodesZetex
1
50mA
60V
-
Surface Mount
PDI123
2
3 x 1.93 x 1mm
3mm
1.93mm
1mm
+150 °C
-40 °C
Texas Instruments REF200AU Constant Current Diode, 100μA, 40V max, 8-Pin SOIC
Texas Instruments REF200AU Constant Current Diode, 100μA, 40V max, 8-Pin SOIC
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Also available in industry standard packaging
RS Stock No.: 197-7487Brand: Texas InstrumentsManufacturers Part No.: REF200AU

€ 9.46

€ 9.46 Each (ex VAT)

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Texas Instruments
3
100µA
40V
40V
-
SOIC
8
-
-
-
-
-
-
Texas Instruments LM234Z-6/NOPB Programmable Current Source, 10mA, 3-Pin TO-92
Texas Instruments LM234Z-6/NOPB Programmable Current Source, 10mA, 3-Pin TO-92
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Also available in industry standard packaging
RS Stock No.: 761-5476Brand: Texas InstrumentsManufacturers Part No.: LM234Z-6/NOPB

€ 5.65

€ 1.13 Each (In a Pack of 5) (ex VAT)

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5

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5€ 1.13
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Texas Instruments
1
10mA
30V
-
Through Hole
TO-92
3
5.2 x 4.19 x 5.2mm
5.2mm
4.19mm
5.2mm
+100 °C
-25 °C
Texas Instruments LM334M/NOPB Constant Current Diode, 10mA, 8-Pin SOIC
Texas Instruments LM334M/NOPB Constant Current Diode, 10mA, 8-Pin SOIC
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RS Stock No.: 535-9082Brand: Texas InstrumentsManufacturers Part No.: LM334M/NOPB

€ 4.88

€ 0.975 Each (In a Pack of 5) (ex VAT)

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Texas Instruments
1
10mA
40V
-
Surface Mount
SOIC
8
4.9 x 3.9 x 1.45mm
4.9mm
3.9mm
1.45mm
+70 °C
0 °C
DiodesZetex AL5809-120QP1-7 Constant Current Diode, 120mA, 2-Pin PDI123
DiodesZetex AL5809-120QP1-7 Constant Current Diode, 120mA, 2-Pin PDI123
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Also available in industry standard packaging
RS Stock No.: 133-3331Brand: DiodesZetexManufacturers Part No.: AL5809-120QP1-7

€ 4.59

€ 0.23 Each (In a Pack of 20) (ex VAT)

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DiodesZetex
1
120mA
60V
-
Surface Mount
PDI123
2
3 x 1.93 x 1mm
3mm
1.93mm
1mm
+150 °C
-40 °C
DiodesZetex AL5809-120QP1-7 Constant Current Diode, 120mA, 2-Pin PDI123
DiodesZetex AL5809-120QP1-7 Constant Current Diode, 120mA, 2-Pin PDI123
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RS Stock No.: 168-9536Brand: DiodesZetexManufacturers Part No.: AL5809-120QP1-7

€ 773.96

€ 0.258 Each (On a Reel of 3000) (ex VAT)

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DiodesZetex
1
120mA
60V
-
Surface Mount
PDI123
2
3 x 1.93 x 1mm
3mm
1.93mm
1mm
+150 °C
-40 °C
DiodesZetex AL5809-30QP1-7 Constant Current Diode, 30mA, 2-Pin PDI123
DiodesZetex AL5809-30QP1-7 Constant Current Diode, 30mA, 2-Pin PDI123
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RS Stock No.: 168-9539Brand: DiodesZetexManufacturers Part No.: AL5809-30QP1-7

€ 664.85

€ 0.222 Each (On a Reel of 3000) (ex VAT)

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DiodesZetex
1
30mA
60V
-
Surface Mount
PDI123
2
3 x 1.93 x 1mm
3mm
1.93mm
1mm
+150 °C
-40 °C
DiodesZetex AL5809-50QP1-7 Constant Current Diode, 50mA, 2-Pin PDI123
DiodesZetex AL5809-50QP1-7 Constant Current Diode, 50mA, 2-Pin PDI123
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RS Stock No.: 168-9540Brand: DiodesZetexManufacturers Part No.: AL5809-50QP1-7

€ 681.90

€ 0.227 Each (On a Reel of 3000) (ex VAT)

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DiodesZetex
1
50mA
60V
-
Surface Mount
PDI123
2
3 x 1.93 x 1mm
3mm
1.93mm
1mm
+150 °C
-40 °C
DiodesZetex AP2502KTR-G1 Constant Current Diode, 6-Pin SOT-23
DiodesZetex AP2502KTR-G1 Constant Current Diode, 6-Pin SOT-23
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Also available in industry standard packaging
RS Stock No.: 921-0477Brand: DiodesZetexManufacturers Part No.: AP2502KTR-G1

€ 8.42

€ 0.281 Each (In a Pack of 30) (ex VAT)

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DiodesZetex
1
-
6V
-
Surface Mount
SOT-23
6
3.02 x 1.7 x 1.3mm
3.02mm
1.7mm
1.3mm
+85 °C
-40 °C
DiodesZetex AP2502KTR-G1 Constant Current Diode, 6-Pin SOT-23
DiodesZetex AP2502KTR-G1 Constant Current Diode, 6-Pin SOT-23
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RS Stock No.: 165-8354Brand: DiodesZetexManufacturers Part No.: AP2502KTR-G1

€ 385.27

€ 0.128 Each (On a Reel of 3000) (ex VAT)

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3000

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3000€ 0.128
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DiodesZetex
1
-
6V
-
Surface Mount
SOT-23
6
3.02 x 1.7 x 1.3mm
3.02mm
1.7mm
1.3mm
+85 °C
-40 °C
DiodesZetex BCR421UW6Q-7 Constant Current Diode, 10mA, 6-Pin SOT-26
DiodesZetex BCR421UW6Q-7 Constant Current Diode, 10mA, 6-Pin SOT-26
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RS Stock No.: 168-9550Brand: DiodesZetexManufacturers Part No.: BCR421UW6Q-7

€ 378.45

€ 0.126 Each (On a Reel of 3000) (ex VAT)

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DiodesZetex
1
10mA
40V
-
Surface Mount
SOT-26
6
3.1 x 1.7 x 1.3mm
3.1mm
1.7mm
1.3mm
+150 °C
-55 °C
Nexperia PSSI2021SAY,115 Constant Current Diode, 50mA, 73V max, 5-Pin SC-88A
Nexperia PSSI2021SAY,115 Constant Current Diode, 50mA, 73V max, 5-Pin SC-88A
Add to parts list
Also available in industry standard packaging
RS Stock No.: 170-5384Brand: NexperiaManufacturers Part No.: PSSI2021SAY,115

€ 3.75

€ 0.15 Each (In a Pack of 25) (ex VAT)

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25

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Nexperia
2
50mA
75V
73V
Surface Mount
SC-88A
5
2.2 x 1.35 x 1mm
2.2mm
1.35mm
1mm
+150 °C
-65 °C
Texas Instruments LM234Z-3/NOPB Programmable Current Source, 10mA, 3-Pin TO-92
Texas Instruments LM234Z-3/NOPB Programmable Current Source, 10mA, 3-Pin TO-92
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RS Stock No.: 921-6819Brand: Texas InstrumentsManufacturers Part No.: LM234Z-3/NOPB

€ 2,520.30

€ 1.40 Each (On a Reel of 1800) (ex VAT)

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1800

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1800€ 1.40
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Texas Instruments
1
10mA
40V
-
Through Hole
TO-92
3
5.2 x 4.19 x 5.2mm
5.2mm
4.19mm
5.2mm
+100 °C
-25 °C
Texas Instruments LM234Z-6/NOPB Programmable Current Source, 10mA, 3-Pin TO-92
Texas Instruments LM234Z-6/NOPB Programmable Current Source, 10mA, 3-Pin TO-92
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RS Stock No.: 921-6813Brand: Texas InstrumentsManufacturers Part No.: LM234Z-6/NOPB

€ 1,266.29

€ 0.703 Each (In a Tube of 1800) (ex VAT)

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1800

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1800€ 0.703
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Texas Instruments
1
10mA
40V
-
Through Hole
TO-92
3
5.2 x 4.19 x 5.2mm
5.2mm
4.19mm
5.2mm
+100 °C
-25 °C