Number: DB-226
Nov, 2010 / A
Page 1
S E M IC O N D U C TO R
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
()
Max
IZK
(mA)
ZZK @ IZK
()
Max
IR @ VR
(A)
Max
VR
(Volts)
ZM4728A 3.3 76 10 1 400 100 1
ZM4729A 3.6 69 10 1 400 100 1
ZM4730A 3.9 64 9 1 400 50 1
ZM4731A 4.3 58 9 1 400 10 1
ZM4732A 4.7 53 8 1 500 10 1
ZM4733A 5.1 49 7 1 550 10 1
ZM4734A 5.6 45 5 1 600 10 2
ZM4735A 6.2 41 2 1 700 10 3
ZM4736A 6.8 37 3.5 1 700 10 4
ZM4737A 7.5 34 4 0.5 700 10 5
ZM4738A 8.2 31 4.5 0.5 700 10 6
ZM4739A 9.1 28 5 0.5 700 10 7
ZM4740A 10 25 7 0.25 700 10 7.6
ZM4741A 11 23 8 0.25 700 5 8.4
ZM4742A 12 21 9 0.25 700 5 9.1
ZM4743A 13 19 10 0.25 700 5 9.9
ZM4744A 15 17 14 0.25 700 5 11.4
ZM4745A 16 15.5 16 0.25 700 5 12.2
ZM4746A 18 14 20 0.25 700 5 13.7
Cathode
Anode
ELECTRICAL SYMBOL
Z
M
4
728A through
Z
M
4758A
SURFACE MOUNT
LL-41
Cathode Band Color: Blue
Number: DB-226
Nov, 2010 / A
Page 2
S E M IC O N D U C TO R
Electrical Characteristics TA = 25°C unless otherwise noted
Device Type
VZ @ IZT
(Volts)
Nominal
IZT
(mA)
ZZT @ IZT
()
Max
IZK
(mA)
ZZK @ IZK
()
Max
IR @ VR
(A)
Max
VR
(Volts)
ZM4747A 20 12.5 22 0.25 750 5 15.2
ZM4748A 22 11.5 23 0.25 750 5 16.7
ZM4749A 24 10.5 25 0.25 750 5 18.2
ZM4750A 27 9.5 35 0.25 750 5 20.6
ZM4751A 30 8.5 40 0.25 1000 5 22.8
ZM4752A 33 7.5 45 0.25 1000 5 25.1
ZM4753A 36 7 50 0.25 1000 5 27.4
ZM4754A 39 6.5 60 0.25 1000 5 29.7
ZM4755A 43 6 70 0.25 1500 5 32.7
ZM4756A 47 5.5 80 0.25 1500 5 35.8
ZM4757A 51 5 95 0.25 1500 5 38.8
ZM4758A 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 voltages 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.
Number: DB-226
Nov, 2010 / A
Page 3
S E M IC O N D U C TO R
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
Number: DB-111
April 29, 2008 / A
DISCLAIMER NOTICE
NOTICE
The information presented in this document is for reference only. Tak Cheong reserves the right to make
changes without notice for the specification of the products displayed herein.
The product listed herein is designed to be used with ordinary electronic equipment or devices, and not
designed to be used with equipment or devices which require high level of reliability and the malfunction of
with would directly endanger hum an life (such as medical instruments, tran sportation equipment, ae rospace
machinery, nuclear-reactor controllers, fuel controllers and other safety devices), Tak Cheong
Semiconductor Co., Ltd., or anyone on its behalf, assumes no responsibility or liability for any damagers
resulting from such improper use of sale.
This publication supersedes & replaces all information previously supplied. For additional information, please
visit our website http://www.takcheong.com, or consult your nearest Tak Cheong’s sales office for further
assistance.