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SMAJ530 THRU SMAJ550
Surface Mount TransZorb
TM
Transient Voltage Suppressors
Voltage Range 530 to 550 Volts 300 Watts Peak Power
Features
a a a a a a Plastic package has Underwriters Laboratory Flammability Classification 94V-0 Protects power IC controllers such as TOPSwitch(R) Excellent clamping capability Glass passivated junction High temperature soldering guaranteed: 260+ / 10 seconds at terminals Available in unidirectional only
.062(1.58) .056(1.43)
SMA/DO-214AC
.111(2.83) .102(2.58)
.187(4.75) .167(4.25)
Mechanical Data
a a a a Case: JEDEC DO-201AC molded plastic body over passivated junction Terminals: Solder plated, solderable per MIL-STD750, Method 2026 Polarity: The band denotes the cathode, which is positive with respect to the anode under normal TVS operation Mounting position: Any Weight: 0.002 ounce, 0.064 gram Dimensions in inches and (millimeters) Unless Otherwise Noted.
.103(2.61) .078(1.99) .012(.31) .006(.15) .008(.20) .004(.10) .056(1.41) .035(0.90) .210(5.33) .195(4.95)
a
Maximum Ratings and Thermal Characteristics TA= 25+
Type Number
Device Marking Code Peak Pulse Power Dissipation (Note 1, 2 Fig. 1)
Symbol PPPM PM(AV) VWM R JL R JA TJ, TSTG Symbol V(BR) VC ID CJ
Steady State Power Dissipation at TL=75 OC Stand-off Voltage Typical Thermal resistance Junction-to-lead Typical Thermal Resistance Junction-to-ambient Operating and Storage Temperature Range
SMAJ530 SMAJ550 HD SB Minimum 300 1.0 477 495 27 75 -55 to + 150
Units Watts Watts V +/W +/W + Units V V uA mV+ pF
Electrical Characteristics
Type Number
Minimum Breakdown Voltage at 100uA
Max. Clamping Voltage at 400mA, 10/1000uS-Waveform Maximum DC Reverse Leakage Current at VWM Typical Temperature Coefficient of VBR Typical Capacitance (Note 3) at 0V 200V
SMAJ530 SMAJ550 530 550 760 5.0 650 90 7.5
Notes: 1. Non Repetitive Current Pulse per Fig. 3 and Derated above 25OC per Fig. 2. 2. Peak Pulse Power Waveform is 10 / 1000uS. 3. Measured at 1MHz.
RATINGS AND CHARACTERISTIC CURVES (SMAJ530 THRU SMAJ550)
FIG.1- PEAK PULSE POWER RATING CURVE
NON-REPETITIVE PULSE WAVEFORM SHOWN in FIG. 3 TA=250C
FIG.2- PULSE DERATING CURVE
PEAK PULSE POWER (Pppm) or CURRENT (lpp) DERATING IN PERCENTAGE, %
100
100
Pppm, PEAK PULSE POWER, KW
75
10
50
1.0
25
0.2" sq 5.0mm 2 COPPER PAD AREAS
0.1 0.1 s
1.0 s
10 s
100 s
1.0ms
10ms
0
0
25
50
75
100
125
O
150
175
200
td. PULSE WIDTH, sec.
TA, AMBIENT TEMPERATURE. C
FIG.3- PULSE WAVEFORM
150
lppm, PEAK PULSE CURRENT %
PULSE WIDTH (td) is DEFINED tr=10 sec. AS THE POINT WHERE THE PEAK CURRENT DECAYS to 50% of lppm
PEAK VALUE lppm HALF VALUE- lpp 2
100
50
10/1000 sec. WAVEFORM AS DEFINED BY R.E.A. td
0
0
1.0
2.0 t, TIME, ms
3.0
4.0

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