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Transient Voltage Suppression Diodes

Speciﬁcations are subject to change without notice.

Revised: 01/20/14

Surface Mount – 400W > SMAJ series

I-V Curve Characteristics

Ratings and Characteristic Curves (T

=25°C unless otherwise noted)

Voltage Transients

Time

Voltage Across TVS

Current Through TVS

Voltage or Current

Figure 1 - TVS Transients Clamping Waveform Figure 2 - Peak Pulse Power Rating Curve

0.1

0.0000010.000010.0001 0.001

-Pulse Width (sec.)

PPM

-Peak Pulse Power (kW)

0.2x0.2" (5.0x5.0mm)

Copper Pad Area

Ipp

Uni-directional

Ipp

Bi-directional

PPM

Peak Pulse Power Dissipation -- Max power dissipation

Stand-off Voltage -- Maximum voltage that can be applied to the TVS without operation

Breakdown Voltage -- Maximum voltage that ﬂows though the TVS at a speciﬁed test current (I

)

Clamping Voltage -- Peak voltage measured across the suppressor at a speciﬁed Ippm (peak impulse current)

Reverse Leakage Current -- Current measured at V

Forward Voltage Drop for Uni-directional

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Littelfuse SMAJ Series Manual de usuario Pagina 3