Expanded Lineup of Surge Protection Zener Diodes that Support the Quality Improvement of Electronic Equipment by Adding New Voltage Ranks

Product News 2024-05

The package photograph of expanded lineup of surge protection zener diodes that support the quality improvement of electronic equipment by adding new voltage ranks.

Toshiba has expanded the lineup with the addition of ten 10 Zener voltage ranks each to five-series[1] of Zener diodes that protect semiconductor devices from switching surges[2] and Electrostatic Discharge (ESD)[3].

The new products can protect semiconductor devices from switching surges and induced lighting surges with long pulse width in the order of microseconds to milliseconds and overvoltage comparable to DC.

In addition, the low dynamic resistance and low clamping voltage characteristics provide superior surge-absorbing capability and reduce the voltage applied to semiconductor devices, same as Toshiba’s existing lineup. 
This helps to improve the quality of electronic equipment.
These packages are the industry standard SOT-23, the 3-pin packages SOT-346 (S-Mini), SOT-323 (USM), 2-pin packages SOD-323 (USC), and SOD-523 (ESC).
Furthermore, Zener voltage ranks have been added to accommodate a variety of voltage lines and mounting areas.

Notes:
[1] MKZ series, MSZ series, MUZ series, CUZ series, and CEZ series
[2] IEC61000-4-5 (tp=8/20 μs pulse)
[3] IEC61000-4-2

Applications

  • Consumer equipment (home appliances, power supplies, etc.)
  • Industrial equipment (OA equipment, power supplies, etc.)

Features

  • Allows protection from surges with wide pulse width range in the order of microseconds to milliseconds
  • Low dynamic resistance and low clamp voltage
  • Adds Zener voltage to support a wide range of voltage lines:
    VZ (typ.)=5.6 V to 36.0 V (Including existing products) and compatible with E24 series

Main Specifications

MKZ Series

(Ta=25 °C)

Part number Package Absolute maximum ratings Electrical characteristics
Name

Size
(mm)
Typ.
Electrostatic
discharge
voltage

VESD[3]
(kV)
Peak pulse
current
IPP[2]
(A)
Zener voltage
VZ
(V)
Clamp
voltage
VC[4][5]
(V)
Dynamic
resistance
RDYN[4]
(Ω)
Contact Air Min Typ. Max Test
current
I(mA)
Typ. Typ.
MKZ5V6 SOT-23
(SOT23)

2.9×
2.4×
0.9
±30 12.0 5.3 5.6 6.0 5 9.0 0.16
MKZ6V2 11.0 5.8 6.2 6.6 5 10.0 0.21
MKZ6V8 10.0 6.4 6.8 7.2 5 13.0 0.27
MKZ7V5[6] 9.5 7.0 7.5 7.9 5 14.0 0.32
MKZ8V2 8.5 7.7 8.2 8.7 5 16.5 0.37
MKZ9V1[6] 8.0 8.5 9.1 9.6 5 17.0 0.44
MKZ10V[6] 7.5 9.4 10.0 10.6 5 19.0 0.52
MKZ11V[6] 7.25 10.4 11.0 11.6 5 24.0 0.60
MKZ12V 7.0 11.4 12.0 12.6 5 26.0 0.70
MKZ13V[6] 6.5 12.4 13.0 14.1 5 27.0 0.80
MKZ15V[6] 5.6 13.8 15.0 15.6 5 24.0 0.60
MKZ16V 5.5 15.3 16.0 17.1 5 27.0 0.50
MKZ18V[6] 5.1 16.8 18.0 19.1 5 28.5 0.40
MKZ20V 5.0 18.8 20.0 21.2 5 30.5 0.35
MKZ22V[6] 4.75 20.8 22.0 23.3 5 32.0 0.40
MKZ24V 4.5 22.8 24.0 25.6 5 36.5 0.60
MKZ27V[6] ±20 4.1 25.1 27.0 28.9 2 45.0 0.90
MKZ30V 4.0 28.0 30.0 32.0 2 47.5 1.25

MKZ33V[6]

±17 3.5 31.0 33.0 35.0 2 57.0 1.80

MKZ36V

±12 3.0 34.0 36.0 38.0 2 63.0 2.60

MSZ Series

(Ta=25 °C)

Part number Package Absolute maximum ratings Electrical characteristics
Name

Size
(mm)
Typ.
Electrostatic
discharge
voltage

VESD[3]
(kV)
Peak pulse
current
IPP[2]
(A)
Zener voltage
VZ
(V)
Clamp
voltage
VC[4][5]
(V)
Dynamic
resistance
RDYN[4]
(Ω)
Contact Air Min Typ. Max Test
current
I(mA)
Typ. Typ.
MSZ5V6 SOT-346
(S-Mini)

2.9×
2.5×
1.1
±30 12.0 5.3 5.6 6.0 5 9.0 0.16
MSZ6V2 11.0 5.8 6.2 6.6 5 10.0 0.21
MSZ6V8 10.0 6.4 6.8 7.2 5 13.0 0.27
MSZ7V5[6] 9.5 7.0 7.5 7.9 5 14.0 0.32
MSZ8V2 8.5 7.7 8.2 8.7 5 16.5 0.37
MSZ9V1[6] 8.0 8.5 9.1 9.6 5 17.0 0.44
MSZ10V[6] 7.5 9.4 10.0 10.6 5 19.0 0.52
MSZ11V[6] 7.25 10.4 11.0 11.6 5 24.0 0.60
MSZ12V 7.0 11.4 12.0 12.6 5 26.0 0.70
MSZ13V[6] 6.5 12.4 13.0 14.1 5 27.0 0.80
MSZ15V[6] 5.6 13.8 15.0 15.6 5 24.0 0.60
MSZ16V 5.5 15.3 16.0 17.1 5 27.0 0.50
MSZ18V[6] 5.1 16.8 18.0 19.1 5 28.5 0.40
MSZ20V 5.0 18.8 20.0 21.2 5 30.5 0.35
MSZ22V[6] 4.75 20.8 22.0 23.3 5 32.0 0.40
MSZ24V 4.5 22.8 24.0 25.6 5 36.5 0.60
MSZ27V[6] ±20 4.1 25.1 27.0 28.9 2 45.0 0.90
MSZ30V 4.0 28.0 30.0 32.0 2 47.5 1.25
MSZ33V[6] ±17 3.5 31.0 33.0 35.0 2 57.0 1.80
MSZ36V ±12 3.0 34.0 36.0 38.0 2 63.0 2.60

MUZ Series

(Ta=25 °C)

Part number Package Absolute maximum ratings Electrical characteristics
Name

Size
(mm)
Typ.
Electrostatic
discharge
voltage

VESD[3]
(kV)
Peak pulse
current
IPP[2]
(A)
Zener voltage
VZ
(V)
Clamp
voltage
VC[4][5]
(V)
Dynamic
resistance
RDYN[4]
(Ω)
Contact Air Min Typ. Max Test
current
I(mA)
Typ. Typ.
MUZ5V6 SOT-323
(USM)

2.0×
2.1×
0.9
±30 12.0 5.3 5.6 6.0 5 9.0 0.16
MUZ6V2 11.0 5.8 6.2 6.6 5 10.0 0.21
MUZ6V8 10.0 6.4 6.8 7.2 5 13.0 0.27
MUZ7V5[6] 9.5 7.0 7.5 7.9 5 14.0 0.32
MUZ8V2 8.5 7.7 8.2 8.7 5 16.5 0.37
MUZ9V1[6] 8.0 8.5 9.1 9.6 5 17.0 0.44
MUZ10V[6] 7.5 9.4 10.0 10.6 5 19.0 0.52
MUZ11V[6] 7.25 10.4 11.0 11.6 5 24.0 0.60
MUZ12V 7.0 11.4 12.0 12.6 5 26.0 0.70
MUZ13V[6] 6.5 12.4 13.0 14.1 5 27.0 0.80
MUZ15V[6] 5.6 13.8 15.0 15.6 5 24.0 0.60
MUZ16V 5.5 15.3 16.0 17.1 5 27.0 0.50
MUZ18V[6] 5.1 16.8 18.0 19.1 5 28.5 0.40
MUZ20V 5.0 18.8 20.0 21.2 5 30.5 0.35
MUZ22V[6] 4.75 20.8 22.0 23.3 5 32.0 0.40
MUZ24V 4.5 22.8 24.0 25.6 5 36.5 0.60
MUZ27V[6] ±20 4.1 25.1 27.0 28.9 2 45.0 0.90
MUZ30V 4.0 28.0 30.0 32.0 2 47.5 1.25
MUZ33V[6] ±17 3.5 31.0 33.0 35.0 2 57.0 1.80
MUZ36V ±12 3.0 34.0 36.0 38.0 2 63.0 2.60

CUZ Series

(Ta=25 °C)

Part number Package Absolute maximum ratings Electrical characteristics
Name

Size
(mm)
Typ.
Electrostatic
discharge
voltage

VESD[3]
(kV)
Peak pulse
current
IPP[2]
(A)
Zener voltage
VZ
(V)
Clamp
voltage
VC[4][5]
(V)
Dynamic
resistance
RDYN[4]
(Ω)
Contact Air Min Typ. Max Test
current
I(mA)
Typ. Typ.
CUZ5V6 SOD-323
(USC)

2.5×
1.25×
0.9
±30 12.0 5.3 5.6 6.0 5 9.0 0.16
CUZ6V2 11.0 5.8 6.2 6.6 5 10.0 0.21
CUZ6V8 10.0 6.4 6.8 7.2 5 13.0 0.27
CUZ7V5[6] 9.5 7.0 7.5 7.9 5 14.0 0.32
CUZ8V2 8.5 7.7 8.2 8.7 5 16.5 0.37
CUZ9V1[6] 8.0 8.5 9.1 9.6 5 17.0 0.44
CUZ10V[6] 7.5 9.4 10.0 10.6 5 19.0 0.52
CUZ11V[6] 7.25 10.4 11.0 11.6 5 24.0 0.60
CUZ12V 7.0 11.4 12.0 12.6 5 26.0 0.70
CUZ13V[6] 6.5 12.4 13.0 14.1 5 27.0 0.80
CUZ15V[6] 5.6 13.8 15.0 15.6 5 24.0 0.60
CUZ16V 5.5 15.3 16.0 17.1 5 27.0 0.50
CUZ18V[6] 5.1 16.8 18.0 19.1 5 28.5 0.40
CUZ20V 5.0 18.8 20.0 21.2 5 30.5 0.35
CUZ22V[6] 4.75 20.8 22.0 23.3 5 32.0 0.40
CUZ24V 4.5 22.8 24.0 25.6 5 36.5 0.60
CUZ27V[6] ±20 4.1 25.1 27.0 28.9 2 45.0 0.90
CUZ30V 4.0 28.0 30.0 32.0 2 47.5 1.25
CUZ33V[6] ±17 3.5 31.0 33.0 35.0 2 57.0 1.80
CUZ36V ±12 3.0 34.0 36.0 38.0 2 63.0 2.60

CEZ Series

(Ta=25 °C)

Part number Package Absolute maximum ratings Electrical characteristics
Name

Size
(mm)
Typ.
Electrostatic
discharge
voltage

VESD[3]
(kV)
Peak pulse
current
IPP[2]
(A)
Zener voltage
VZ
(V)
Clamp
voltage
VC[4][5]
(V)
Dynamic
resistance
RDYN[4]
(Ω)
Contact Air Min Typ. Max Test
current
I(mA)
Typ. Typ.
CEZ5V6 SOD-523
(ESC)

1.6×
0.8×
0.6
±30 12.0 5.3 5.6 6.0 5 9.0 0.16
CEZ6V2 11.0 5.8 6.2 6.6 5 10.0 0.21
CEZ6V8 10.0 6.4 6.8 7.2 5 13.0 0.27
CEZ7V5[6] 9.5 7.0 7.5 7.9 5 14.0 0.32
CEZ8V2 8.5 7.7 8.2 8.7 5 16.5 0.37
CEZ9V1[6] 8.0 8.5 9.1 9.6 5 17.0 0.44
CEZ10V[6] 7.5 9.4 10.0 10.6 5 19.0 0.52
CEZ11V[6] 7.25 10.4 11.0 11.6 5 24.0 0.60
CEZ12V 7.0 11.4 12.0 12.6 5 26.0 0.70
CEZ13V[6] 6.5 12.4 13.0 14.1 5 27.0 0.80
CEZ15V[6] 5.6 13.8 15.0 15.6 5 24.0 0.60
CEZ16V 5.5 15.3 16.0 17.1 5 27.0 0.50
CEZ18V[6] 5.1 16.8 18.0 19.1 5 28.5 0.40
CEZ20V 5.0 18.8 20.0 21.2 5 30.5 0.35
CEZ22V[6] 4.75 20.8 22.0 23.3 5 32.0 0.40
CEZ24V 4.5 22.8 24.0 25.6 5 36.5 0.60
CEZ27V[6] ±20 4.1 25.1 27.0 28.9 2 45.0 0.90
CEZ30V 4.0 28.0 30.0 32.0 2 47.5 1.25
CEZ33V[6] ±17 3.5 31.0 33.0 35.0 2 57.0 1.80
CEZ36V ±12 3.0 34.0 36.0 38.0 2 63.0 2.60

Notes:
[4] TLP parameter: 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.
[5] ITLP =16 A
[6] New products

Internal Circuits

The illustration of internal circuit of expanded lineup of surge protection zener diodes that support the quality improvement of electronic equipment by adding new voltage ranks.

Application Circuit Examples

The illustration of application circuit examples of expanded lineup of surge protection zener diodes that support the quality improvement of electronic equipment by adding new voltage ranks.

Note:
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.

* Company names, product names, and service names may be trademarks of their respective companies.
* Information in this document, including product prices and specifications, content of services and contact information, is current on the date of the announcement but is subject to change without prior notice.

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