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TAK CHEONG
®
SEMICONDUCTOR
1 Watt LL-41 Hermetically
Sealed Glass Zener Voltage
Regulators
Absolute Ma ximum Ra ti ng s 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 leads are readily solderable
Cathode indicated by polarity band
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
TCZM4747A 20 12.5 22 0.25 750 5 15.2
TCZM4748A 22 11.5 23 0.25 750 5 16.7
Cathode Anode
ELECTRICAL SYMBOL
TCZM4728A through TCZM4758A Series
SURFACE MOUNT
LL-41
DEVICE MARKING DIAGRAM
Cathode Band Color: Blue
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TAK CHEONG
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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)
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 voltages sho wn and tighter
voltage tolerances, contact your nearest Tak Cheong’s representative.
3. The z ener 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.
Electrical Symbol Definition Typical Characteristics
Symbol Parameter
VZ Reverse Zener Voltage @ IZT
IZT Reverse Current
ZZT Maximum Zener Impedance @ IZT
IZK Reverse Current
ZZK Maximum Zener Impedance @ IZK
IR Reverse Leakage Current @ VR
VR Breakdown Voltage
IF Forward Current
VF Forward Voltage @ IF
Ordering Information
Device Packing options Package Quantity
TCZM47xxA 7” Reel Tape and Reel 1,500
TCZM47xxAR13 13” Reel Tape and Reel 5,000
TCZM47xxA Others (…contact Tak Cheong sales representatives)
LL41 MELF Tape Packaging Standards
This standard practices for surface-mount tape packaging of leadless (MELF) components meets the requirements of EIA Standard RS-
418-A
V
I
(mV)
(V)
(mA)
(mA)
VF
IF
VR IR
VZ
IZT
(nA)
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TAK CHEONG
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SEMICONDUCTOR
LL- 41 MELF Tape & Reel Packaging Information
Label
Antistatic Cover Tape
Static Dissipative Embossed
Carrier Tape
Cathode
LL-41 MELF UN IT ORIENTATION
Carrier Tape
Cover Tape Trailer Tape
80mm minimum or
20 empty pockets.
Leader Tape
500mm minimum or
125 empty pockets.
Components
Packaging Description:
LL- 41 MELF parts are shipped in tape and
reel. The carrier tape is made from a
dissipative (carton filled) polycarbonate
resin. The cover tape is a multiplayer film
(Heat Activated Adhesive in nature)
primarily composed of polyester film,
adhesive layer, sealant, and anti-static
sprayed agent. These reeled parts in
standard option are shipped with 2,500
units per 7” or 178mm diameter reel. The
reels are blue in color and made of
recyclable plastic. Other option comes in
10,000 units per 13” or 330mm diameter
reel
LL- 41 MELF Pa ckagi ng Outline
LL- 41 MELF Leader and Trailer
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TAK CHEONG
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SEMICONDUCTOR
LL- 41 MELF Tape & Reel Packaging Information
LL- 41 MELF Reel Outline
Dimensions are in millimeters
Tape Size Reel Size QTY Option Dim A Dim B Dim C Dim D Dim N W1 W2 W3
7” 1,500 180 1.5 13 20.2 60 12.4 18.4 11.9 – 15.4
12mm 13” 5,000 330 1.5 13 20.2 100 12.4 18 .4 11.9 - 15.4
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TAK CHEONG
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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
