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 370 μA Constant Current Diode 5-Pin SC-88 75 V
RS Stock No.170-4833BrandNexperiaManufacturers Part No.PSSI2021SAY,115HSN Code85412100

SR 3,105.00

SR 1.035 Each (On a Reel of 3000) (ex VAT)

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Nexperia
Constant Current Diode
-
Constant Current Source
Surface
SC-88
5
-
75V
-
150°C
2.2mm
1mm
PSSI2021SAY
No
1.35 mm
-65°C
No
370μA
DiodesZetex BCR421UW6Q-7 1.2 mA Constant Current Diode 6-Pin SOT-26 40 V
Also available in industry standard packaging
RS Stock No.133-3345BrandDiodesZetexManufacturers Part No.BCR421UW6Q-7HSN Code85411000

SR 29.90

SR 1.495 Each (In a Pack of 20) (ex VAT)

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DiodesZetex
Constant Current Diode
-
Linear LED CONSTANT CURRENT REGULATOR
Surface
SOT-26
6
-
40V
-
150°C
3.1mm
1.3mm
BCR421
No
1.7 mm
-55°C
AEC-Q100
1.2mA
Texas Instruments LM334Z/NOPB 10 mA Constant Current Diode 3-Pin TO-92 40 V
Also available in industry standard packaging
RS Stock No.535-9098BrandTexas InstrumentsManufacturers Part No.LM334Z/NOPBHSN Code85423990

SR 28.75

SR 5.75 Each (In a Pack of 5) (ex VAT)

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Texas Instruments
Constant Current Diode
±3 %
Current Regulator
Through Hole
TO-92
3
1V
40V
Current
70°C
5.2mm
5.2mm
LM334
No
4.19 mm
0°C
No
10mA
Texas Instruments LM234Z-3/NOPB 10 mA Programmable Current Source 3-Pin TO-92 40 V
Also available in industry standard packaging
RS Stock No.761-5472BrandTexas InstrumentsManufacturers Part No.LM234Z-3/NOPBHSN Code85423990

SR 103.50

SR 20.70 Each (In a Pack of 5) (ex VAT)

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Texas Instruments
Programmable Current Source
±3 %
Current Regulator
Through Hole
TO-92
3
1V
40V
Current
100°C
5.2mm
5.2mm
LM234
No
4.19 mm
-25°C
No
10mA
DiodesZetex AL5809-30QP1-7 150 mA Constant Current Diode 2-Pin PDI123 60 V
Also available in industry standard packaging
RS Stock No.133-3334BrandDiodesZetexManufacturers Part No.AL5809-30QP1-7HSN Code85423990

SR 38.64

SR 1.932 Each (In a Pack of 20) (ex VAT)

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DiodesZetex
Constant Current Diode
±5 %
2-Terminal Constant Current LED Driver
Surface
PDI123
2
2.5V
60V
Low Side, High Side
150°C
3mm
1mm
AL5809
No
1.93 mm
-40°C
No
150mA
Texas Instruments Constant Current Diode 8-Pin SOIC 40 V
RS Stock No.197-7486BrandTexas InstrumentsManufacturers Part No.REF200AUHSN Code85423390

SR 3,967.50

SR 52.90 Each (In a Tube of 75) (ex VAT)

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Texas Instruments
Constant Current Diode
±0.5 %
-
Surface
SOIC
8
2.5V
40V
Current
85°C
5mm
1.75mm
REF200
No
3.98 mm
-25°C
No
-
Texas Instruments REF200AU Constant Current Diode 8-Pin SOIC 40 V
Also available in industry standard packaging
RS Stock No.197-7487BrandTexas InstrumentsManufacturers Part No.REF200AUHSN Code85423390

SR 72.45

SR 72.45 Each (ex VAT)

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Texas Instruments
Constant Current Diode
±0.5 %
-
Surface
SOIC
8
2.5V
40V
Current
85°C
5mm
1.75mm
REF200
No
3.98 mm
-25°C
No
-
Texas Instruments LM234Z-6/NOPB 10 mA Programmable Current Source 3-Pin TO-92 30 V
Also available in industry standard packaging
RS Stock No.761-5476BrandTexas InstrumentsManufacturers Part No.LM234Z-6/NOPBHSN Code85423990

SR 34.50

SR 6.90 Each (In a Pack of 5) (ex VAT)

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Texas Instruments
Programmable Current Source
±3 %
Current Regulator
Through Hole
TO-92
3
1V
30V
Current
100°C
5.2mm
5.2mm
LM234
No
4.19 mm
-25°C
No
10mA
Texas Instruments LM334M/NOPB 10 mA Constant Current Diode 8-Pin SOIC 40 V
Also available in industry standard packaging
RS Stock No.535-9082BrandTexas InstrumentsManufacturers Part No.LM334M/NOPBHSN Code85423990

SR 40.25

SR 8.05 Each (In a Pack of 5) (ex VAT)

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Texas Instruments
Constant Current Diode
±3 %
Current Regulator
Surface
SOIC
8
1V
40V
Current
70°C
4.9mm
1.45mm
LM334
No
3.9 mm
0°C
No
10mA
DiodesZetex 1.2 mA Constant Current Diode 6-Pin SOT-26 40 V
RS Stock No.168-9550BrandDiodesZetexManufacturers Part No.BCR421UW6Q-7HSN Code85411000

SR 2,898.00

SR 0.966 Each (On a Reel of 3000) (ex VAT)

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DiodesZetex
Constant Current Diode
-
Linear LED CONSTANT CURRENT REGULATOR
Surface
SOT-26
6
-
40V
-
150°C
3.1mm
1.3mm
BCR421
No
1.7 mm
-55°C
AEC-Q100
1.2mA
DiodesZetex 150 mA Constant Current Diode 2-Pin PDI123 60 V
RS Stock No.168-9539BrandDiodesZetexManufacturers Part No.AL5809-30QP1-7HSN Code85423990

SR 5,106.00

SR 1.702 Each (On a Reel of 3000) (ex VAT)

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DiodesZetex
Constant Current Diode
±5 %
2-Terminal Constant Current LED Driver
Surface
PDI123
2
2.5V
60V
Low Side, High Side
150°C
3mm
1mm
AL5809
No
1.93 mm
-40°C
No
150mA
DiodesZetex 150 mA Constant Current Diode 2-Pin PDI123 60 V
RS Stock No.168-9536BrandDiodesZetexManufacturers Part No.AL5809-120QP1-7HSN Code85423990

SR 5,899.50

SR 1.966 Each (On a Reel of 3000) (ex VAT)

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DiodesZetex
Constant Current Diode
±5 %
2-Terminal Constant Current LED Driver
Surface
PDI123
2
2.5V
60V
Low Side, High Side
150°C
3mm
1mm
AL5809
No
1.93 mm
-40°C
No
150mA
DiodesZetex 20 mA Constant Current Diode 6-Pin SOT-23 6 V
RS Stock No.165-8354BrandDiodesZetexManufacturers Part No.AP2502KTR-G1HSN Code85423990

SR 2,932.50

SR 0.978 Each (On a Reel of 3000) (ex VAT)

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DiodesZetex
Constant Current Diode
-
4-Channel Linear Constant Current Sink
Surface
SOT-23
6
2V
6V
-
85°C
3.02mm
1.3mm
AP2502
No
1.7 mm
-40°C
No
20mA
DiodesZetex AL5809-120QP1-7 150 mA Constant Current Diode 2-Pin PDI123 60 V
Also available in industry standard packaging
RS Stock No.133-3331BrandDiodesZetexManufacturers Part No.AL5809-120QP1-7HSN Code85423990

SR 36.34

SR 1.817 Each (In a Pack of 20) (ex VAT)

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DiodesZetex
Constant Current Diode
±5 %
2-Terminal Constant Current LED Driver
Surface
PDI123
2
2.5V
60V
Low Side, High Side
150°C
3mm
1mm
AL5809
No
1.93 mm
-40°C
No
150mA
DiodesZetex AP2502KTR-G1 20 mA Constant Current Diode 6-Pin SOT-23 6 V
Also available in industry standard packaging
RS Stock No.921-0477BrandDiodesZetexManufacturers Part No.AP2502KTR-G1HSN Code85423990

SR 50.72

SR 1.69 Each (In a Pack of 30) (ex VAT)

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DiodesZetex
Constant Current Diode
-
4-Channel Linear Constant Current Sink
Surface
SOT-23
6
2V
6V
-
85°C
3.02mm
1.3mm
AP2502
No
1.7 mm
-40°C
No
20mA
Nexperia PSSI2021SAY,115 370 μA Constant Current Diode 5-Pin SC-88 75 V
Also available in industry standard packaging
RS Stock No.170-5384BrandNexperiaManufacturers Part No.PSSI2021SAY,115HSN Code85412100

SR 29.04

SR 1.162 Each (In a Pack of 25) (ex VAT)

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Nexperia
Constant Current Diode
-
Constant Current Source
Surface
SC-88
5
-
75V
-
150°C
2.2mm
1mm
PSSI2021SAY
No
1.35 mm
-65°C
No
370μA
Texas Instruments 10 mA Constant Current Diode 3-Pin TO-92 40 V
RS Stock No.121-8833BrandTexas InstrumentsManufacturers Part No.LM334Z/NOPBHSN Code85423990

SR 6,210.00

SR 3.45 Each (In a Box of 1800) (ex VAT)

Add to basket
Texas Instruments
Constant Current Diode
±3 %
Current Regulator
Through Hole
TO-92
3
1V
40V
Current
70°C
5.2mm
5.2mm
LM334
No
4.19 mm
0°C
No
10mA
Texas Instruments 10 mA Constant Current Diode 8-Pin SOIC 40 V
RS Stock No.121-8832BrandTexas InstrumentsManufacturers Part No.LM334M/NOPBHSN Code85423990

SR 437.00

SR 4.60 Each (In a Tube of 95) (ex VAT)

Add to basket
Texas Instruments
Constant Current Diode
±3 %
Current Regulator
Surface
SOIC
8
1V
40V
Current
70°C
4.9mm
1.45mm
LM334
No
3.9 mm
0°C
No
10mA
Texas Instruments 10 mA Constant Current Diode 8-Pin SOIC 40 V
RS Stock No.208-8575BrandTexas InstrumentsManufacturers Part No.LM334MX/NOPBHSN Code85411000

SR 8,625.00

SR 3.45 Each (On a Reel of 2500) (ex VAT)

Add to basket
Texas Instruments
Constant Current Diode
±3 %
Current Regulator
Surface
SOIC
8
1V
40V
Current
70°C
5mm
1.75mm
LM334
No
3.98 mm
0°C
No
10mA
Texas Instruments 10 mA Programmable Current Source 3-Pin TO-92 30 V
RS Stock No.921-6813BrandTexas InstrumentsManufacturers Part No.LM234Z-6/NOPBHSN Code85423990

SR 10,350.00

SR 5.75 Each (In a Tube of 1800) (ex VAT)

Add to basket
Texas Instruments
Programmable Current Source
±3 %
Current Regulator
Through Hole
TO-92
3
1V
30V
Current
100°C
5.2mm
5.2mm
LM234
No
4.19 mm
-25°C
No
10mA