Toshiba Electronic Devices & Storage Corporation ("Toshiba") will start manufacturing sequentially 24 products in CEZ series, CUZ series, MUZ series, and MSZ series of Zener diodes that protect semiconductor devices from switching surges, inductive lightning surges[1] and electrostatic discharge (ESD)[2].

In power lines of equipment, switching surges up to the order of thousands volts with long pulse widths up to milliseconds may be generated when the circuit switches. The new products protect semiconductor devices from switching surges and overvoltage with frequency close to DC. They can also protect semiconductor devices from ESD[2] with several hundred nanoseconds width and inductive lightning surges[1] with pulse width in the order of microseconds as well. In addition, their low dynamic resistance and low clamp voltage characteristics allow them to absorb surges well, lowering the voltage applied to the semiconductor devices. This contributes to the improved equipment reliability.
Products supporting six values of Zener voltage (typ.) from 5.6 V to 24 V to cover major power lines are offered in four packages. The lineup comprises a total of 24 products. They can be used for various voltage lines and mounting areas.

Notes :
[1] @IEC61000-4-5, tp=8/20 μs
[2] @IEC61000-4-2

Features

Applications

Product Specifications

(@Ta=25 °C)

Series Part
number
Packages Absolute maximum ratings Zener voltage
VZ
@IZ=5 mA
(V)
Clamp
voltage
VC[3][4]
typ.
(V)
Dynamic
resistance
RDYN[3]
typ.
(Ω)
Name Size
typ.
(mm)
Electrostatic
discharge
voltage
VESD[2]
(kV)
Peak
pulse
current
IPP[1]
(A)
Contact Air min typ. max
CEZ CEZ5V6 SOD-523
(ESC)
1.6×
0.8×
0.6
±30 12 5.3 5.6 6.0 9 0.16
CEZ6V2 11 5.8 6.2 6.6 10 0.21
CEZ6V8 10 6.4 6.8 7.2 13 0.27
CEZ12V 7 11.4 12 12.6 26 0.7
CEZ16V 5.5 15.3 16 17.1 27 0.5
CEZ24V 4.5 22.8 24 25.6 36.5 0.6
CUZ CUZ5V6 SOD-323
(USC)
2.5×
1.25×
0.9
±30 12 5.3 5.6 6.0 9 0.16
CUZ6V2 11 5.8 6.2 6.6 10 0.21
CUZ6V8 10 6.4 6.8 7.2 13 0.27
CUZ12V 7 11.4 12 12.6 26 0.7
CUZ16V 5.5 15.3 16 17.1 27 0.5
CUZ24V 4.5 22.8 24 25.6 36.5 0.6
MUZ MUZ5V6 SOT-323
(USM)
2.0×
2.1×
0.9
±30 12 5.3 5.6 6.0 9 0.16
MUZ6V2 11 5.8 6.2 6.6 10 0.21
MUZ6V8 10 6.4 6.8 7.2 13 0.27
MUZ12V 7 11.4 12 12.6 26 0.7
MUZ16V 5.5 15.3 16 17.1 27 0.5
MUZ24V 4.5 22.8 24 25.6 36.5 0.6
MSZ MSZ5V6 SOT-346
(S-Mini)
2.9×
2.5×
1.1
±30 12 5.3 5.6 6.0 9 0.16
MSZ6V2 11 5.8 6.2 6.6 10 0.21
MSZ6V8 10 6.4 6.8 7.2 13 0.27
MSZ12V 7 11.4 12 12.6 26 0.7
MSZ16V 5.5 15.3 16 17.1 27 0.5
MSZ24V 4.5 22.8 24 25.6 36.5 0.6

Notes :
[3] TLP parameters : Z0=50 Ω, tp=100 ns, tr=300 ps, averaging window : t1=30 ns to t2=60 ns, extraction of dynamic resistance using least squares fit of TLP characteristics between ITLP1=16 A and ITLP2=30 A.
[4] ITLP=16 A

Internal Circuits

The illustration of internal circuits of Zener diodes for power line surge protection contributing to improvement of equipment reliability : CEZ series, CUZ series, MUZ series, MSZ series.

Application Circuit Examples

The illustration of application circuit examples of Zener diodes for power line surge protection contributing to improvement of equipment reliability : CEZ series, CUZ series, MUZ series, MSZ series.

The application circuits shown in this document are provided for reference purposes only. Thorough evaluation is required, especially at the mass-production design stage. Providing these application circuit examples does not grant any license for industrial property rights.

Characteristic figures (reference)[5]

The illustration of characteristic figures (reference)[5] of Zener diodes for power line surge protection contributing to improvement of equipment reliability : CEZ series, CUZ series, MUZ series, MSZ series.
The illustration of characteristic figures (reference)[5] of Zener diodes for power line surge protection contributing to improvement of equipment reliability : CEZ series, CUZ series, MUZ series, MSZ series.

Notes :
[5] As of July 2020, values measured by Toshiba
[6] @Mounted on an FR4 board (25.4x25.4 mm, Cu pad 645 mm2), Ta=25 °C, TLP parameters : Z0=50 Ω, tp=100 ns, tr=300 ps, averaging window : t1=30 ns to t2=60 ns



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