TVS Diodes

A ‌Transient Voltage Suppression (TVS) diode‌ is a specialized semiconductor device designed to protect sensitive electronics from ‌sudden voltage spikes‌ (e.g., electrostatic discharge/ESD, lightning strikes, or switching surges). It operates by rapidly diverting excess current away from protected circuits, clamping the voltage to a safe level within nanoseconds. Unlike standard diodes, TVS diodes feature ‌larger PN junctions‌ to handle high-energy transients without damage‌

Core Working Principle‌:

‌1. Reverse Standby State:

In normal operation (voltage < breakdown threshold), the TVS diode acts as an open circuit with minimal leakage current.

2‌. Clamping During Surge:

When a transient voltage exceeds the ‌reverse breakdown voltage(typically 5V–495V), the diode instantly switches to a low-impedance state, shunting current to ground and limiting voltage across the protected circuit‌

3.Self-Recovery:

After the surge passes, it automatically resets to standby mode.

Part Number

UNI-POLAR

BI-POLAR

Package

Device Marking Code

UNI

BI

Power Dissipation

Ppk(W)

Reverse
Stand-off
Voltage

VRWM(V)

Breakdown Voltage VBR @  IT

Min.(V)

Max.(V)

Test Current

IT(mA)

Max. Clamping Voltage @ IPP

VC MAX.(V)

Max. Peak Pulse Current

IPP(A)

Max. Reverse
Leakage @ VRWM 

IR(μA)

SMF170CA
SOD123FL
PR
ER
200
170
189
209
1
275
0.7
1
SMF180CA
SOD123FL
PT
ET
200
180
201
222
1
292
0.7
1
SMF190CA
SOD123FL
PV
EV
200
190
209
243
1
308
0.6
1
SMF200CA
SOD123FL
PX
EX
200
200
224
247
1
324
0.6
1
SMF210CA
SOD123FL
PZ
EZ
200
210
231
268
1
340
0.6
1
SMF220CA
SOD123FL
QE
FE
200
220
246
272
1
356
0.5
1
SOD123FL
QG
/
200
250
279
309
1
405
0.5
1
SOD123FL
QK
/
200
300
335
371
1
486
0.4
1
SOD123FL
QM
/
200
350
391
432
1
567
0.3
1
SOD123FL
QP
/
200
400
447
494
1
648
0.3
1
SOD123FL
QR
/
200
440
492
543
1
713
0.3
1
P2SM6.8CA
SOD123FL
6V8A
6V8C
200
5.8
6.45
7.14
10
10.5
19.5
1000
P2SM7.5CA
SOD123FL
7V5A
7V5C
200
6.4
7.13
7.88
10
11.3
18.15
500
P2SM8.2CA
SOD123FL
8V2A
8V2C
200
7.02
7.79
8.61
10
12.1
16.95
200
P2SM9.1CA
SOD123FL
9V1A
9V1C
200
7.78
8.65
9.55
1
13.4
15.3
50
Total 1659 < 1...345...111 > proceed page OK

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Address: No.196, East Qingyu Road‌, Rucheng Street, Rugao-226500, Jiangsu Province, China.

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