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.: 170-4833Brand: NexperiaManufacturers Part No.: PSSI2021SAY,115HSN Code: 85412100

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
-
2.2mm
1.35 mm
1mm
150°C
No
PSSI2021SAY
-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.: 133-3345Brand: DiodesZetexManufacturers Part No.: BCR421UW6Q-7HSN Code: 85411000

SR 28.98

SR 1.449 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
-
3.1mm
1.7 mm
1.3mm
150°C
No
BCR421
-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.: 535-9098Brand: Texas InstrumentsManufacturers Part No.: LM334Z/NOPBHSN Code: 85423990

SR 28.06

SR 5.612 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
5.2mm
4.19 mm
5.2mm
70°C
No
LM334
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.: 761-5472Brand: Texas InstrumentsManufacturers Part No.: LM234Z-3/NOPBHSN Code: 85423990

SR 101.89

SR 20.378 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
5.2mm
4.19 mm
5.2mm
100°C
No
LM234
-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.: 133-3334Brand: DiodesZetexManufacturers Part No.: AL5809-30QP1-7HSN Code: 85423990

SR 38.41

SR 1.92 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
3mm
1.93 mm
1mm
150°C
No
AL5809
-40°C
No
150mA
Texas Instruments Constant Current Diode 8-Pin SOIC 40 V
RS Stock No.: 197-7486Brand: Texas InstrumentsManufacturers Part No.: REF200AUHSN Code: 85423390

SR 3,904.54

SR 52.06 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
5mm
3.98 mm
1.75mm
85°C
No
REF200
-25°C
No
-
Texas Instruments REF200AU Constant Current Diode 8-Pin SOIC 40 V
Also available in industry standard packaging
RS Stock No.: 197-7487Brand: Texas InstrumentsManufacturers Part No.: REF200AUHSN Code: 85423390

SR 72.48

SR 72.48 Each (ex VAT)

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Texas Instruments
Constant Current Diode
±0.5 %
-
Surface
SOIC
8
2.5V
40V
Current
5mm
3.98 mm
1.75mm
85°C
No
REF200
-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.: 761-5476Brand: Texas InstrumentsManufacturers Part No.: LM234Z-6/NOPBHSN Code: 85423990

SR 33.46

SR 6.693 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
5.2mm
4.19 mm
5.2mm
100°C
No
LM234
-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.: 535-9082Brand: Texas InstrumentsManufacturers Part No.: LM334M/NOPBHSN Code: 85423990

SR 37.43

SR 7.486 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
4.9mm
3.9 mm
1.45mm
70°C
No
LM334
0°C
No
10mA
DiodesZetex 1.2 mA Constant Current Diode 6-Pin SOT-26 40 V
RS Stock No.: 168-9550Brand: DiodesZetexManufacturers Part No.: BCR421UW6Q-7HSN Code: 85411000

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
-
3.1mm
1.7 mm
1.3mm
150°C
No
BCR421
-55°C
AEC-Q100
1.2mA
DiodesZetex 150 mA Constant Current Diode 2-Pin PDI123 60 V
RS Stock No.: 168-9536Brand: DiodesZetexManufacturers Part No.: AL5809-120QP1-7HSN Code: 85423990

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
3mm
1.93 mm
1mm
150°C
No
AL5809
-40°C
No
150mA
DiodesZetex 150 mA Constant Current Diode 2-Pin PDI123 60 V
RS Stock No.: 168-9539Brand: DiodesZetexManufacturers Part No.: AL5809-30QP1-7HSN Code: 85423990

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
3mm
1.93 mm
1mm
150°C
No
AL5809
-40°C
No
150mA
DiodesZetex 20 mA Constant Current Diode 6-Pin SOT-23 6 V
RS Stock No.: 165-8354Brand: DiodesZetexManufacturers Part No.: AP2502KTR-G1HSN Code: 85423990

SR 2,898.00

SR 0.966 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
-
3.02mm
1.7 mm
1.3mm
85°C
No
AP2502
-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.: 133-3331Brand: DiodesZetexManufacturers Part No.: AL5809-120QP1-7HSN Code: 85423990

SR 35.42

SR 1.771 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
3mm
1.93 mm
1mm
150°C
No
AL5809
-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.: 921-0477Brand: DiodesZetexManufacturers Part No.: AP2502KTR-G1HSN Code: 85423990

SR 50.02

SR 1.668 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
-
3.02mm
1.7 mm
1.3mm
85°C
No
AP2502
-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.: 170-5384Brand: NexperiaManufacturers Part No.: PSSI2021SAY,115HSN Code: 85412100

SR 28.18

SR 1.127 Each (In a Pack of 25) (ex VAT)

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Nexperia
Constant Current Diode
-
Constant Current Source
Surface
SC-88
5
-
75V
-
2.2mm
1.35 mm
1mm
150°C
No
PSSI2021SAY
-65°C
No
370μA
Texas Instruments 10 mA Constant Current Diode 3-Pin TO-92 40 V
RS Stock No.: 121-8833Brand: Texas InstrumentsManufacturers Part No.: LM334Z/NOPBHSN Code: 85423990

SR 6,230.70

SR 3.462 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
5.2mm
4.19 mm
5.2mm
70°C
No
LM334
0°C
No
10mA
Texas Instruments 10 mA Constant Current Diode 8-Pin SOIC 40 V
RS Stock No.: 121-8832Brand: Texas InstrumentsManufacturers Part No.: LM334M/NOPBHSN Code: 85423990

SR 407.50

SR 4.29 Each (In a Tube of 95) (ex VAT)

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Texas Instruments
Constant Current Diode
±3 %
Current Regulator
Surface
SOIC
8
1V
40V
Current
4.9mm
3.9 mm
1.45mm
70°C
No
LM334
0°C
No
10mA
Texas Instruments 10 mA Constant Current Diode 8-Pin SOIC 40 V
RS Stock No.: 208-8575Brand: Texas InstrumentsManufacturers Part No.: LM334MX/NOPBHSN Code: 85411000

SR 8,653.75

SR 3.462 Each (On a Reel of 2500) (ex VAT)

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Texas Instruments
Constant Current Diode
±3 %
Current Regulator
Surface
SOIC
8
1V
40V
Current
5mm
3.98 mm
1.75mm
70°C
No
LM334
0°C
No
10mA
Texas Instruments 10 mA Programmable Current Source 3-Pin TO-92 30 V
RS Stock No.: 921-6813Brand: Texas InstrumentsManufacturers Part No.: LM234Z-6/NOPBHSN Code: 85423990

SR 9,356.40

SR 5.198 Each (In a Tube of 1800) (ex VAT)

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