Product Brief
RoHS & REACH Compliant

CMJA5050

50V, 50-80mA Adjustable Current Limiting Diodein the DFN123F package

Top View

Bottom View

DFN123F

Central Semiconductor’s CMJA5050 is a 50V Current Limiting Diode (CLD) developed to meet design requirements formaintaining a constant current with adjustable current regulation from 50mA to 80mA. This adjustable device eliminates theneed to use multiple CLDs in order to meet the current regulation values required. Packaged in the low profile DFN123F surface
mount case, this device is ideal for any application requiring a space saving current regulating device, including LED lighting andtest/measurement equipment.

Features

Applications• Constant current range• Adjustable regulation up to 80mA
• Wide operating voltage• Negative temperature coefficientfor LED protection
Steady State
Regulator Current*

Maximum LimitingVoltage• LED lighting and displays

5055• Eliminates need for additional
regulation• Space savings• Low profile package• RoHS and REACH compliant• AC lighting panels• Decorative lighting• Test and measurement
equipment
Maximum Temperature
Coefficient**

IL @ VT=12VVL @ IL=0.8 x IP MIN
MIN NOM MAXVmAmAmA45Benefits

TCMaximum Limiting
VoltageIP @ VT=20V
VL @ IL=0.8 x IP MIN
MIN NOM MAXVmAmA
mAmA/°C

8.5

Pulsed Regulator
Current*-0.3

72*Measured after applying DC test voltage for 90 seconds duration or greaterwith device mounted on FR-4 PC Board with 2oz. copper mounting pad area of
300mm2 in still air.
**Measured between 25°C and 50°C.

8088

8.0

Maximum Temperature
Coefficient**
TCmA/°C-0.3*Pulse width <1.0ms**Measured between 25°C and 50°C.

Adjustment Compensation Resistance:
Placing resistors in parallel with a CLD allows the regulator current to beadjusted from 50mA to 80mA. This also corrects any current decrease when
the applied voltage increases due to self heating.
REGULATOR CURRENT PER RESISTANCE:
Steady StateRegulator Current

Resistor(1/4W)IL @ VT=12V
MINmA
45
49.5
54
58.5
67.5
72

NOMmA
50
55
60
65
75
80

MAXmA
55
60.5
66
71.5
82.5
88

Ω
none***
1000
800
600
500
400

***A 3000Ω resistor may be added to achieve more linear regulator
current characteristics.

SPICE Models, Package Details and other technical resources:

RoHS and REACH compliance declarations

Engineering resources are available at www.centralsemi.com.

Visit the Quality section of Central’s website to access.

Central Semiconductor Corp. • 145 Adams Avenue•

Hauppauge, NY 11788 • USA • www.centralsemi.com

CMJA5050

50V, 50-80mA Adjustable
Current Limiting Diodein the DFN123F package
TYPICAL ELECTRICAL CHARACTERISTICS

Central Semiconductor Corp. • 145 Adams Avenue•

Hauppauge, NY 11788 • USA • www.centralsemi.com

CMJA5050
Mechanical Drawing:
DFN123F

50V, 50-80mA Adjustable
Current Limiting Diodein the DFN123F package
Tape Dimensions and Orientation

Devices are taped inaccordance withElectronic Industries
Association Standard
EIA-481-D(Dimensions in mm)

Direction of Unreeling

Tape Width: 12mm

Packaging Base

Mounting Pad Geometry(Dimensions in mm)

Reel
Size

Quantity

7”

3,000 pcs.

13”

10,000 pcs.

Reel Packing Information

SYMBOLABCDEFGDIMENSIONSINCHESMILLIMETERS
MIN
MAX
MIN
MAX
0.144 0.152
3.65
3.85
0.059 0.067
1.50
1.70
0.031 0.0390.80
1.00
0.000 0.002
0.00
0.05
0.110 0.118
2.80
3.00
0.033 0.037
0.85
0.95
0.020 0.028
0.50
0.70
DFN123F (REV: R0)

Shipping Weight(Max.)

Reels perBox(Maximum)

Parts perBox(Maximum)

INCH

CM

LB

KG

7”

918
40
108

27,00054,000120,000
324,000

9x9x5
9x9x9
21x9x927x9x17

23x23x13
23x23x23
53x23x23
69x23x43

71430
78

4
714
36

13”

514
26

25,00070,000130,000

15x4x1515x15x9
15x15x18

38x10x38
38x38x23
38x38x46

71730

4814ReelSize

Box Dimensions

Ordering Information
Part Marking: 4-6 Character
Alpha/Numeric Code

Reel
Size

Orderable Part No.

7”

Add “TR” as suffix to Central part no. (example: CMJA5050 TR)

13”

Add “TR13” as suffix to Central part no. (example: CMJA5050 TR13)

For more information on Central’s products and solutions:

Call us at: 1.631.435.1110
Or view online: www.centralsemi.com/featured-products

MarkingCodeCA50

CustomSolutions
Available
PB CMJA5050 (R2 0121)