Vishay MMBZ27VDA-V Schematic [ru]

Small Signal Zener Diodes, Dual

Features

• Dual Silicon Planar Zener Diodes with
Common Anode configurations

• Dual package provides for Bidirectional or
separate unidirectional configurations

• The dual configurations protect two separate lines
with only one device

• Peak Power: 40 W at 1 ms (Bidirectional)

• For bidirectional operation, circuit connected to
pins 1 and 2. For unidirectional operation, circuit
connected to pins 1 and 3 or pins 2 and 3

• Lead (Pb)-free component

• Component in accordance to RoHS 2002/95/EC
and WEEE 2002/96/EC

e3

MMBZ27VDA-V

Vishay Semiconductors

MMBZ27VDA

3

12

Common Anode

20048

Marking:

MMBZ27VDA-V = TA7

Mechanical Data

Case: SOT-23 Plastic case
Weight: approx. 8.8 mg
Terminals: Solderable per MIL-STD-750,

method 2026

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

= 25 °C, unless otherwise specified

amb

Parameter Test condition Symbol Value Unit

Peak power dissipation

Power dissipation

on FR-5 Board

Power dissipation

on Alumina Substrate

1)

Nonrepetitive current pulse per Figure 2 and derate above T

2)

FR-5 = 1.0 x 0.75 x 0.62 in.

3)

Alumina = 0.4 x 0.3 x 0.024 in., 99.5 % alumina.

1)

T

= 25 °C

2)

3)

amb

Derate above 25 °C

T

= 25 °C

amb

Derate above 25 °C

P

PK

P

tot

P

tot

= 25 °C per Figure 3.

amb

40 W

225

1.8

300

2.4

mW/°C

mW/°C

mW

mW

Thermal Characteristics

T

= 25 °C, unless otherwise specified

amb

Parameter Test condition Symbol Value Unit

Thermal resistance junction to ambiant air R

Operating and storage temperature range T

Document Number 81294

Rev. 1.0, 08-Mar-06

j

, T

thJA

stg

556 °C/W

- 55 to + 150 °C

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1

MMBZ27VDA-V

Vishay Semiconductors

Electrical Characteristics

Partnumber Breakdown

1)

Voltage

VBR at I

T

V mA V nA A V mV/°C V mA

min max

MMBZ27VDA-V 25.65 28.35 1.0 22.0 80 1.0 38.0 30 1.1 200

Note:

1)

VBR measured at pulse test current IT at an ambient temperature of 25 °C

2)

Surge current waveform per Figure 2 and derate per Figure 3

Typical Characteristics

T

= 25 °C, unless otherwise specified

amb

Te st

Current

I

T

Working

Peak

Reverse

Voltage

V

RWM

Max.
Reverse
Leakage

Current

I

R

Max.

Reverse

Surge

Current

I

PP

Max. Reverse

Voltage

(Clamping

Voltage)

RSM

2)

VC at I

Max.

Temperature

Coefficient

at V

BR

Max. Forward

Voltage

V

F

at I

F

300

,POWER DISSIPATION (mW)

tot

P

18655

250

2

150

100

00

FR-5 BOARD

50

0

25

0

ALUMINA SUBSTRATE

7

5

5

0

T,

Temperature (°C)

1

00

Figure 1. Steady State Power Derating Curve

t

r

100

Value (%)

Peak Value-I

Half Value-

50

Pulse width (tp) is defined
as that point where the
peak current decays to
50 % of I tr ≤ 10 µs

RSM

I

RSM

2

RSM

100

75

= 25 Z (°C)

A

50

2

5

power or current at T

Peak pulse derating in % of peak

18657

0

0

25

1

75

1

1

50

25

75

50

-

T

Ambient Temperature (°C)

A

100

125

200

175

15

0

Figure 3. Pulse Derating Curve

0

0

18656

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2

tp

1

2

t, Time (ms)

Figure 2. Pulse Waveform

3

4

Document Number 81294

Rev. 1.0, 08-Mar-06