SMAJ550

Channels :
Capacitance :
Termination Style :
Peak Surge Current :
Polarity : Unidirectional
Maximum Operating Temperature : + 150 C
Minimum Operating Temperature : - 55 C
Packaging : Reel
Package / Case : DO-214AC
Clamping Voltage : 760 V
Operating Voltage : 495 V
Breakdown Voltage : 550 V
Peak Pulse Power Dissipation : 300 W (Min)


Features:

Plastic package has Underwriters Laboratory Flammability Classification 94V-0
Protects TOPSwitchâ
Glass Passivated Junction
High temperature soldering guaranteed:250°C/10 seconds at terminals
Exellent Clamping capability
Available in unidirectional only


Application

Respect Thermal Resistance (PCB Layout) - as the temperature coefficient also contributes to the clamping voltage.
Select minimum breakdown voltage, so you get acceptable power dissipation and PCB tie point temperature. Devices with higher breakdown voltage will have a shorter conduction time and will dissipate less power.
Clamping voltage is influenced by internal resistance - design approximation is 7V per 100mA slope.
Keep temperature of TVS lower than TOPSwitchâ as a recommendation.
Maximum current is determined by the maximum TJ and can be higher than 300mA. Contact supplier for different clamping voltage / current arrangements.
Minimum breakdown voltage can be customized for other applications.Contact supplier.


Specifications

		SYMBOLS	SMAJ530	SMAJ550	UNITS
Device marking code			HD	SB
Steady state power dissipation		P M(AV)	1.0		Watts
Peak pulse power dissipation		PPPM	Minimum 300		Watts
Minimum breakdown voltage at 100A		V(BR)	530	550	Volts
Maximum clamping voltage at 300mA, 10/1000 s-waveform		Vc	660		Volts
Stand-off voltage		VWM	477	495	Volts
Maximum DC reverse leakage current at VWM		ID	5.0		mA
Typical thermal resistance		RJL	27		°C/W
Typical thermal resistance		RJA	75		°C/W
Typical temperature coefficient of V(BR)			650		mV°C
Typical capacitance	at 0V at 200V	CJ	75 45		pF
Operating junction and storage temperature range		TJ,TSTG	-55 to +150		°C