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Expanded Lineup of Surge Protection Zener Diodes that Support the Quality Improvement of Electronic Equipment by Adding SOT-23 Package Products

2022-06-17 | Return

Toshiba Electronic Devices & Storage Corporation ("Toshiba") has expanded the lineup of Zener diode products in the “MKZ series” by launching products that use the SOT-23 package. Zener diodes protect electronic devices from switching surges[1] and ESD (Electrostatic Discharge)[2].

When mechanical relays or motors are driven, surges can be generated by the counter electromotive force of the coils. The new products are Zener diodes that protect electronic devices from switching surges and ESD. In addition, in the same way as current products in the lineup, the new products can absorb surges well with their low dynamic resistance and low clamp voltage characteristics, suppressing voltage added to electronic devices. This helps to improve the quality of electronic equipment.

Ten products using the general-purpose SOT-23 package are in the lineup with Zener voltages of 5.6 V to 36 V (typ.) to support common voltage values. This allows them to support various voltage lines and mounting areas.

Notes:
[1] @IEC61000-4-5, tp=8/20 μs pulse
[2] @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
● Zener voltage lineups of wide range : VZ (typ.)=5.6 V to 36 V

Main Specifications

(@Ta=25 °C)

Part number	Package		Absolute maximum ratings			Zener voltage VZ typ. (V)	Clamp voltage V_C^[3][4] typ. (V)	Dynamic resistance R_DYN^[3] typ. (Ω)


	Name	Size typ. (mm)
			Electrostatic discharge voltage V_ESD^[2] (kV)		Peak pulse current I_PP^[1] (A)




			Contact	Air		@I_Z=5 mA
MKZ5V6	SOT-23 (SOT23)	2.9 × 2.4 × 0.9	±30		12	5.6	9	0.16
MKZ6V2					11	6.2	10	0.21
MKZ6V8					10	6.8	13	0.27
MKZ8V2					8.5	8.2	16.5	0.37
MKZ12V					7	12	26	0.7
MKZ16V					5.5	16	27	0.5
MKZ20V					5	20	30.5	0.35
MKZ24V					4.5	24	36.5	0.6
MKZ30V			±20		4	30^[5]	47.5	1.25
MKZ36V			±12		3	36^[5]	63	1.45

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
[5] @IZ=2 mA (MKZ30V, MKZ36V)

Internal Circuit

Application Circuit Examples

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.

Characteristic Figures（Reference）

Notes:
[6] @Mounted on an FR4 board (25.4 × 25.4 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

Source: https://www.global.toshiba