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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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.: REF200AUHSN Code: 85423390

SR 3,725.14

SR 49.668 Each (In a Tube of 75) (ex VAT)

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Texas Instruments
3
100µA
40V
40V
-
SOIC
8
-
-
-
-
-
-
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.: 197-7487Brand: Texas InstrumentsManufacturers Part No.: REF200AUHSN Code: 85423390

SR 67.94

SR 67.94 Each (ex VAT)

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1

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Texas Instruments
3
100µA
40V
40V
-
SOIC
8
-
-
-
-
-
-
Texas Instruments LM334MX/NOPB Constant Current Diode, 1mA, 0.8V max, 8-Pin SOIC
Texas Instruments LM334MX/NOPB Constant Current Diode, 1mA, 0.8V max, 8-Pin SOIC
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RS Stock No.: 208-8575Brand: Texas InstrumentsManufacturers Part No.: LM334MX/NOPBHSN Code: 85411000

SR 6,727.50

SR 2.691 Each (On a Reel of 2500) (ex VAT)

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Texas Instruments
1
1mA
40V
0.8V
-
SOIC
8
-
-
-
-
-
-
Texas Instruments LM334MX/NOPB Constant Current Diode, 1mA, 0.8V max, 8-Pin SOIC
Texas Instruments LM334MX/NOPB Constant Current Diode, 1mA, 0.8V max, 8-Pin SOIC
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RS Stock No.: 208-8576Brand: Texas InstrumentsManufacturers Part No.: LM334MX/NOPBHSN Code: 85411000

SR 80.50

SR 3.22 Each (In a Pack of 25) (ex VAT)

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Texas Instruments
1
1mA
40V
0.8V
-
SOIC
8
-
-
-
-
-
-
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,115HSN Code: 85412100

SR 2,932.50

SR 0.978 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-7HSN Code: 85411000

SR 35.65

SR 1.782 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/NOPBHSN Code: 85423990

SR 24.96

SR 4.991 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
+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/NOPBHSN Code: 85423990

SR 83.20

SR 16.64 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.: AL5809-30QP1-7HSN Code: 85423990

SR 44.16

SR 2.208 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
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.: 133-3335Brand: DiodesZetexManufacturers Part No.: AL5809-50QP1-7HSN Code: 85423990

SR 62.56

SR 3.128 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 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.: 761-5476Brand: Texas InstrumentsManufacturers Part No.: LM234Z-6/NOPBHSN Code: 85423990

SR 39.90

SR 7.981 Each (In a Pack of 5) (ex VAT)

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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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Also available in industry standard packaging
RS Stock No.: 535-9082Brand: Texas InstrumentsManufacturers Part No.: LM334M/NOPBHSN Code: 85423990

SR 36.97

SR 7.394 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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RS Stock No.: 168-9536Brand: DiodesZetexManufacturers Part No.: AL5809-120QP1-7HSN Code: 85423990

SR 5,175.00

SR 1.725 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 AL5809-120QP1-7 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.: AL5809-120QP1-7HSN Code: 85423990

SR 34.50

SR 1.725 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 AL5809-30QP1-7 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.: AL5809-30QP1-7HSN Code: 85423990

SR 4,933.50

SR 1.644 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.: AL5809-50QP1-7HSN Code: 85423990

SR 4,933.50

SR 1.644 Each (On a Reel of 3000) (ex VAT)

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3000

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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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RS Stock No.: 165-8354Brand: DiodesZetexManufacturers Part No.: AP2502KTR-G1HSN Code: 85423990

SR 2,829.00

SR 0.943 Each (On a Reel of 3000) (ex VAT)

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3000

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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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Also available in industry standard packaging
RS Stock No.: 921-0477Brand: DiodesZetexManufacturers Part No.: AP2502KTR-G1HSN Code: 85423990

SR 60.72

SR 2.024 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 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-7HSN Code: 85411000

SR 2,553.00

SR 0.851 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
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Also available in industry standard packaging
RS Stock No.: 170-5384Brand: NexperiaManufacturers Part No.: PSSI2021SAY,115HSN Code: 85412100

SR 29.90

SR 1.196 Each (In a Pack of 25) (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