Datasheet Littelfuse SMAJ18A

TVS Diodes Surface Mount – 400W > SMAJ series SMAJ Series RoHS Pb e3 Description
The SMAJ series is designed specifically to protect
sensitive electronic equipment from voltage transients
induced by lightning and other transient voltage events.
Uni-directional Bi-directional Agency Approvals
Agency Agency File Number
E230531 Maximum Ratings and Thermal Characteristics
(TA=25OC unless otherwise noted)
Parameter Symbol Value Unit PPPM 400 W PPPM 600 W Power Dissipation on Infinite Heat Sink at
TL=50OC PD 3.3 W Peak Forward Surge Current, 8.3ms Single Half
Sine Wave (Note 3) IFSM 60 A Maximum Instantaneous Forward Voltage at
25A for Unidirectional Only (Note 4) VF 3.5/5.0 V
°C Peak Pulse Power Dissipation at TA=25° by
10/1000us Waveform(Fig.2)(Note 1), (Note 2)
-Single Die Parts
Peak Pulse Power Dissipation at TA=25° by
10/1000us Waveform(Fig.2)(Note 1), (Note
2)-Stacked Die Parts(Note 5) TJ -65 to 150 Storage Temperature Range TSTG -65 to 175 °C Typical Thermal Resistance Junction to Lead RθJL 30 °C/W Typical Thermal Resistance Junction to Ambient RθJA 120 °C/W Operating Temperature Range Notes:
1. Non-repetitive current pulse, per Fig.4 and derated above TJ (initial) =25ºC per Fig. 3.
2. Mounted on 5.0x5.0mm copper pad to each terminal.
3. Measured on 8.3ms single half sine wave or equivalent square wave for unidirectional device only.
4. VF < 3.5V for single die parts and VF< 5.0V for stacked-die parts.
5. For stacked die component details, please refer to part numbers labeled by * in Electrical Characteristics. Functional Diagram Features …