SMD Zener Diode
Voltage: 2.4 to 39 Volts
Power: 350 mWatts
RoHS Device
Page 1
REV:A
Features
-Planar die construction
-350mW power dissipation on FR-4 PCB
-Ideally suited for automated assembly
process
-General purpose, medium current
Mechanical data
-Case: SOT-23, Molded plastic
-Terminals: Solderable per MIL-STD-
202G,method 208
-Polarity: See diagram below
-Mounting position: Any
-Marking: see table on page2
CZRT5221B-HF Thru CZRT5267B-HF
Parameter Symbol Value Unit
Electrical Characteristics (TA=25°C, unless otherwise specified)
0.9 V
VF
Forward voltage drop at IF=10mA
Power dissipation (Notes A),TA = 25°C 350
PDmW
QW-JZ002
Single
357 oC/W
RθJA
Thermal resistance, junction to ambient air (Notes A)
Operating junction and storage temperature range -65 to +150
TJOC
Notes:
A. Valid provided that device terminals are kept at ambient temperature.
B. Tested with pulses, Tp≤1.0mS.
Comchip Technology CO., LTD.
Dimensions in inches and (millimeter)
SOT-23
3
1 2
0.119(3.00)
0.110(2.80)
0.056(1.40)
0.047(1.20)
0.079(2.00)
0.071(1.80)
0.041(1.05)
0.035(0.90)
0.020(0.50)
0.012(0.30)
0.006(0.15)
0.002(0.05)
0.100(2.55)
0.089(2.25)
0.004(0.10) max
0.008(0.20) min
-Weight: 0.0078 gram(approx.).
Halogen Free
SMD Zener Diode
Page 2
Electrical Characteristics(Ta = 25°C)
REV:A
Min. Nom. Max. Max. IZT(mA) Max. IZK(mA) Max. VR(V)
CZRT5221B-HF 2.28 2.4 2.52 30 20.0 1200 0.25 100 1.0 KC1
CZRT5222B-HF 2.38 2.5 2.63 30 20.0 1250 0.25 100 1.0 KC2
CZRT5223B-HF 2.57 2.7 2.84 30 20.0 1300 0.25 75 1.0 KC3
CZRT5225B-HF 2.85 3.0 3.15 30 20.0 1600 0.25 50 1.0 KC5
CZRT5226B-HF 3.14 3.3 3.47 28 20.0 1600 0.25 25 1.0 KG1
CZRT5227B-HF 3.42 3.6 3.78 24 20.0 1700 0.25 15 1.0 KG2
CZRT5228B-HF 3.71 3.9 4.10 23 20.0 1900 0.25 10 1.0 KG3
CZRT5229B-HF 4.09 4.3 4.52 22 20.0 2000 0.25 5.0 1.0 KG4
CZRT5230B-HF 4.47 4.7 4.94 19 20.0 1900 0.25 5.0 2.0 KG5
CZRT5231B-HF 4.85 5.1 5.36 17 20.0 1600 0.25 5.0 2.0 KE1
CZRT5232B-HF 5.32 5.6 5.88 11 20.0 1600 0.25 5.0 3.0 KE2
CZRT5234B-HF 5.89 6.2 6.51 7 20.0 1000 0.25 5.0 4.0 KE4
CZRT5235B-HF 6.46 6.8 7.14 5 20.0 750 0.25 3.0 5.0 KE5
CZRT5236B-HF 7.13 7.5 7.88 6 20.0 500 0.25 3.0 6.0 KF1
CZRT5237B-HF 7.79 8.2 8.61 8 20.0 500 0.25 3.0 6.5 KF2
CZRT5239B-HF 8.65 9.1 9.56 10 20.0 600 0.25 3.0 7.0 KF4
CZRT5240B-HF 9.50 10 10.50 17 20.0 600 0.25 3.0 8.0 KF5
CZRT5241B-HF 10.45 11 11.55 22 20.0 600 0.25 2.0 8.4 KH1
CZRT5242B-HF 11.40 12 12.60 30 20.0 600 0.25 1.0 9.1 KH2
CZRT5243B-HF 12.35 13 13.65 13 9.5 600 0.25 0.5 9.9 KH3
CZRT5245B-HF 14.25 15 15.75 16 8.5 600 0.25 0.1 11 KH5
CZRT5246B-HF 15.20 16 16.80 17 7.8 600 0.25 0.1 12 KJ1
CZRT5248B-HF 17.10 18 18.90 21 7.0 600 0.25 0.1 14 KJ3
CZRT5250B-HF 19.00 20 21.00 25 6.2 600 0.25 0.1 15 KJ5
CZRT5251B-HF 20.90 22 23.10 29 5.6 600 0.25 0.1 17 KK1
CZRT5252B-HF 22.80 24 25.20 33 5.2 600 0.25 0.1 18 KK2
CZRT5254B-HF 25.65 27 28.35 41 5.0 600 0.25 0.1 21 KK4
CZRT5255B-HF 26.60 28 29.40 44 4.5 600 0.25 0.1 21 KK5
CZRT5256B-HF 28.50 30 31.50 49 4.2 600 0.25 0.1 23 KM1
CZRT5257B-HF 31.35 33 34.65 58 3.8 700 0.25 0.1 25 KM2
CZRT5258B-HF 34.20 36 37.80 70 3.4 700 0.25 0.1 27 KM3
CZRT5259B-HF 37.05 39 40.95 80 3.2 800 0.25 0.1 30 KM4
CZRT5260B-HF 40.85 43 45.15 93 3.0 900 0.25 0.1 33 KM5
CZRT5261B-HF 44.65 47 49.35 105 2.7 1000 0.25 0.1 36 KN1
CZRT5262B-HF 48.45 51 53.55 125 2.5 1100 0.25 0.1 39 KN2
CZRT5263B-HF 53.20 56 58.80 150 2.2 1300 0.25 0.1 43 KN3
CZRT5264B-HF 57.00 60 63.00 170 2.1 1400 0.25 0.1 46 KN4
CZRT5265B-HF 58.90 62 65.10 185 2.0 1500 0.25 0.1 47 KN5
CZRT5266B-HF 64.60 68 71.40 230 1.8 1600 0.25 0.1 52 KP1
CZRT5267B-HF 71.25 75 78.75 270 1.7 1400 0.25 0.1 56 KP2
Part Number
Operating
Resistance
ZZT(Ohm)
Rising Operating
Resistance
ZZK(Ohm)
Marking
Code
Reverse Current
IR(uA)
Zener Voltage
VZ(V)@IZT
Note: 5% Standard Vz Tolerance
Comchip Technology CO., LTD.
QW-JZ002
Forward Voltage(V)
Forward current(mA)
Fig.1 Typical forward voltage
1
10
100
1000
0.4 0.6 0.8 1.0 1.21.1
0.90.70.5
RATING AND CHARACTERISTIC CURVES (CZRT5221B-HF Thru CZRT5267B-HF)
Temperature coefficient,(mA/°C)
Fig.3 Temperature coefficents
Nominal zener voltage(V)
10
1
100
100
10
Leakage current(uA)
Fig.2 Typical leakage current
0 90
0.00001
20 30 50 60 80704010
0.0001
0.1
1000
0.001
0.01
100
10
1
Normal zener voltage(V)
0
0.6
0.4
0.3
0.2
0.1
0 175125100755025
Power dissipation(W)
Fig.4 Steady state power derating
Temperature(°C)
150
0.5
+10°C
5
+75°C
+25°C
-5°C
+150°C
+25°C
-55°C
TA = 25°C
SMD Zener Diode
Page 3
REV:A
Comchip Technology CO., LTD.
QW-JZ002
SMD Zener Diode
Page 4
REV:A
Comchip Technology CO., LTD.
BCdD D2
D1
E F P P0P1
SOT-23
SYMBOL
A
W W1
(mm)
(inch) 0.122 0.004±0.112 0.004±0.055 0.004±0.061 0.004±7.008 0.04±1.969 MIN. 0.512 0.008±
SOT-23
SYMBOL
(mm)
(inch) 0.069 0.004±0.138 0.002±0.157 0.004±0.157 0.004±0.079 0.002±0.315 0.012
±0.567 MAX.
3.10 ± 0.10 2.85 ± 0.10
4.00 ± 0.10
1.55 ± 0.10
3.50 ± 0.051.75 ± 0.10
50.0 MIN. 13.0 ± 0.201.40 ± 0.10
4.00 ± 0.10 2.00 ± 0.05 8.00 ± 0.30 14.4 MAX.
178 ± 1
QW-JZ002
Reel Taping Specification
Index hole
o
120
Trailer Device Leader
10 pitches (min)10 pitches (min)
.......
.......
....... ..............
....... .............. Start
d
E
F
B W
A
P
P0
P1
D1
D2
D
W1
T
C
Direction of Feed
End
SMD Zener Diode
Page 5
REV:A
Comchip Technology CO., LTD.
Suggested PAD Layout
A
C
B
SIZE
(inch)
0.031
(mm)
0.80
1.90
2.02
0.075
0.080
SOT-23
2.82 0.111
A
B
C
D
D
Standard Packaging
Case Type
Qty per Reel
(Pcs)
3000
SOT-23
Reel Size
(inch)
7
QW-JZ002
