VISHAY
MMBZ5225 to MMBZ5267
Vishay Semiconductors
Small Signal Zener Diodes
Features
• Silicon Planar Power Zener Diodes.
• Standard Zener voltage tolerance is ± 5 % toler-
ance with a "B" suffix and ± 2 % with suffix "C".
• High temperature soldering guaranteed:
250 °C/10 seconds at terminals.
• These diodes are also available in MiniMELF case
with the type designation ZMM5225...ZMM5267,
SOD-123 case with the type designation
MMSZ5225... MMSZ5267.
3
1
2
18078
Mechanical Data
Case:
SOT-23 Plastic case
Weight:
approx. 8.8 mg
Packaging Codes/Options:
GS18 / 10 k per 13 " reel (8 mm tape), 10 k/box
GS08 / 3 k per 7 " reel (8 mm tape), 15 k/box
Absolute Maximum Ratings
T
amb
= 25 °C, unless otherwise specified
Parameter
Zener current (see Table
"Characteristics")
Power dissipation
T
A
= 25 °C
P
tot
P
tot
1)
2)
Test condition
Symbol
Value
Unit
225
1)
300
2)
mW
mW
On FR - 5 board using recommended solder pad layout
On alumina substrate
Thermal Characteristics
T
amb
= 25 °C, unless otherwise specified
Parameter
Thermal resistance junction to
ambient air
Maximum junction temperature
Storage temperature range
1)
Test condition
Symbol
R
thJA
T
j
T
S
Value
556
1)
150
-65 to + 175
Unit
°C/W
°C
°C
On FR - 5 board using recommended solder pad layout
Document Number 85772
Rev. 1.3, 08-Jul-04
www.vishay.com
1
VISHAY
MMBZ5225 to MMBZ5267
Vishay Semiconductors
the Zener current (I
ZT
or I
ZK
) is superimposed on I
ZT
or I
ZK
. Zener Impedance is measured at two points to insure a sharp knee on the
breakdown curve and to eliminate unstable units.
2)
3)
Valid provided case is kept at ambient temperature.
Measured at thermal equilibrium.
Typical Characteristics
(T
amb
= 25
°C
unless otherwise specified)
18114
18672
Figure 1. Forward characteristics
Figure 3. Admissible Power Dissipation vs. Ambient Temperature
°
C
18118
18116
Figure 2. Capacitance vs. Zener Voltage
Figure 4. Pulse Thermal Resistance vs. Pulse Duration
Document Number 85772
Rev. 1.3, 08-Jul-04
www.vishay.com
3
VISHAY
MMBZ5225 to MMBZ5267
Vishay Semiconductors
Ozone Depleting Substances Policy Statement
It is the policy of
Vishay Semiconductor GmbH
to
1. Meet all present and future national and international statutory requirements.
2. Regularly and continuously improve the performance of our products, processes, distribution and
operatingsystems with respect to their impact on the health and safety of our employees and the public, as
well as their impact on the environment.
It is particular concern to control or eliminate releases of those substances into the atmosphere which are
known as ozone depleting substances (ODSs).
The Montreal Protocol (1987) and its London Amendments (1990) intend to severely restrict the use of ODSs
and forbid their use within the next ten years. Various national and international initiatives are pressing for an
earlier ban on these substances.
Vishay Semiconductor GmbH
has been able to use its policy of continuous improvements to eliminate the
use of ODSs listed in the following documents.
1. Annex A, B and list of transitional substances of the Montreal Protocol and the London Amendments
respectively
2. Class I and II ozone depleting substances in the Clean Air Act Amendments of 1990 by the Environmental
Protection Agency (EPA) in the USA
3. Council Decision 88/540/EEC and 91/690/EEC Annex A, B and C (transitional substances) respectively.
Vishay Semiconductor GmbH
can certify that our semiconductors are not manufactured with ozone depleting
substances and do not contain such substances.
We reserve the right to make changes to improve technical design
and may do so without further notice.
Parameters can vary in different applications. All operating parameters must be validated for each
customer application by the customer. Should the buyer use Vishay Semiconductors products for any
unintended or unauthorized application, the buyer shall indemnify Vishay Semiconductors against all
claims, costs, damages, and expenses, arising out of, directly or indirectly, any claim of personal
damage, injury or death associated with such unintended or unauthorized use.
Vishay Semiconductor GmbH, P.O.B. 3535, D-74025 Heilbronn, Germany
Telephone: 49 (0)7131 67 2831, Fax number: 49 (0)7131 67 2423
Document Number 85772
Rev. 1.3, 08-Jul-04
www.vishay.com
5
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