November 2006 / B
Page 1
TAK CHEONG ®
SEMICONDUCTOR
1 Watt LL-41 Hermetically
Sealed Glass Zener Voltage
Regulators
Absolute Maximum Ratings TA = 25°C unless otherwise noted
Parameter Value Units
Storage Temperature Range -65 to +200 °C
Maximum Junction Operating Temperature +175 °C
Total Device Dissipation 1.0 Watt
Thermal Resistance Junction to Ambient 170 °C / W
These ratings are limiting values above which the serviceability of the diode may be impaired.
Specification Features:
Zener Voltage Range 3.3 to 56 Volts
LL-41 MELF Package (JEDEC DO-213AB)
Surface Mount Devices (SMD)
Hermetically Sealed Glass
Compression Bonded Construction
All External Surfaces Are Corrosion Resistant And Terminals Are Readily Solderable
RoHS Compliant
Matte Tin (Sn) Lead Finish
Color band Indicates Negative Polarity
Electrical Characteristics TA = 25°C unless otherwise noted
Device Type VZ @ IZT
(Volts)
Nominal
IZT
(mA)
ZZT @ IZT
(Ω)
Max
IZK
(mA)
ZZK @ IZK
(Ω)
Max
IR @ VR
(µA)
Max
VR
(Volts)
TCZM4728A 3.3 76 10 1 400 100 1
TCZM4729A 3.6 69 10 1 400 100 1
TCZM4730A 3.9 64 9 1 400 50 1
TCZM4731A 4.3 58 9 1 400 10 1
TCZM4732A 4.7 53 8 1 500 10 1
TCZM4733A 5.1 49 7 1 550 10 1
TCZM4734A 5.6 45 5 1 600 10 2
TCZM4735A 6.2 41 2 1 700 10 3
TCZM4736A 6.8 37 3.5 1 700 10 4
TCZM4737A 7.5 34 4 0.5 700 10 5
TCZM4738A 8.2 31 4.5 0.5 700 10 6
TCZM4739A 9.1 28 5 0.5 700 10 7
TCZM4740A 10 25 7 0.25 700 10 7.6
TCZM4741A 11 23 8 0.25 700 5 8.4
TCZM4742A 12 21 9 0.25 700 5 9.1
TCZM4743A 13 19 10 0.25 700 5 9.9
TCZM4744A 15 17 14 0.25 700 5 11.4
TCZM4745A 16 15.5 16 0.25 700 5 12.2
TCZM4746A 18 14 20 0.25 700 5 13.7
Cathode Anode
ELECTRICAL SYMBOL
TCZM4728A through TCZM4758
A
SURFACE MOUNT
LL-41
DEVICE MARKING DIAGRAM
Cathode Band Color: Blue
November 2006 / B
Page 2
TAK CHEONG ®
SEMICONDUCTOR
Electrical Characteristics TA = 25°C unless otherwise noted
Device Type VZ @ IZT
(Volts)
Nominal
IZT
(mA)
ZZT @ IZT
(Ω)
Max
IZK
(mA)
ZZK @ IZK
(Ω)
Max
IR @ VR
(µA)
Max
VR
(Volts)
TCZM4747A 20 12.5 22 0.25 750 5 15.2
TCZM4748A 22 11.5 23 0.25 750 5 16.7
TCZM4749A 24 10.5 25 0.25 750 5 18.2
TCZM4750A 27 9.5 35 0.25 750 5 20.6
TCZM4751A 30 8.5 40 0.25 1000 5 22.8
TCZM4752A 33 7.5 45 0.25 1000 5 25.1
TCZM4753A 36 7 50 0.25 1000 5 27.4
TCZM4754A 39 6.5 60 0.25 1000 5 29.7
TCZM4755A 43 6 70 0.25 1500 5 32.7
TCZM4756A 47 5.5 80 0.25 1500 5 35.8
TCZM4757A 51 5 95 0.25 1500 5 38.8
TCZM4758A 56 4.5 110 0.25 2000 5 42.6
VF Forward Voltage = 1.2 V Maximum @ IF = 200 mA for all types
Notes:
1. The device numbers listed have a standard tolerance on the nominal zener voltage of ±5%.
2. For detailed information on price, availability and delivery of nominal zener voltages between the v oltages shown and tighter
voltage tolerances, contact your nearest Tak Cheong’s representative.
3. The zener impedance is derived from the 60-cycle ac voltage, which results when an ac current having an rms value equal to
10% of the dc zener current (IZT or IZK) is superimposed to IZT or IZK.
November 2006 / B
Page 3
TAK CHEONG ®
SEMICONDUCTOR
Package Outline
Package Case Outline
LL- 41
MELF
LL- 41 MELF
Millimeters Inches
DIM
Min Max Min Max
A 4.80 5.20 0.189 0.205
B 2.39 2.66 0.094 0.105
C 0.41 0.55 0.016 0.022
Notes: 1. All dimensions are within DO-213AB JEDEC standard.
2. LL-41 MELF polarity denoted by cathode band.
B
C
A
This datasheet presents technical data of Tak Cheong’s Zener Diodes. Complete specifications for the individual devices are
provided in the form of datasheets. A comprehensive Selector Guide is included to simplify the task of choosing the best set of
components required for a specific application. For additional information, please visit our website http://www.takcheong.com.
Although information in this datasheet has been carefully checked, no respo nsibility for the inaccurac ies can be assumed by Tak
Cheong. Please consult your nearest Tak Cheong’s sales office for further assistance.
Tak Cheong reserves the right to make changes without further notice to any products herein to further improve reliability,
function or design, cost and productivity.
and are registered trademarks of Tak Cheong Electronics (Holdings) Co., Ltd.
TAK CHEONG
®
