SMAJ550-E3/51 [VISHAY]
Trans Voltage Suppressor Diode, 300W, 495V V(RWM), Unidirectional, 1 Element, Silicon, DO-214AC, PLASTIC, SMA, 2 PIN;
| 型号： | SMAJ550-E3/51 |
| 厂家： | 
VISHAY |
| 描述： | Trans Voltage Suppressor Diode, 300W, 495V V(RWM), Unidirectional, 1 Element, Silicon, DO-214AC, PLASTIC, SMA, 2 PIN |
| 文件： | 总2页 (文件大小：25K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
SMAJ530 and SMAJ550
Vishay Semiconductors
formerly General Semiconductor
Surface Mount TRANSZORB®
Transient Voltage Suppressors
Steady State Power 1W
Peak Pulse Power 300W
Reverse Voltage 530,550V
DO-214AC
(SMA)
Cathode Band
0.065 (1.65)
0.049 (1.25)
0.110 (2.79)
0.100 (2.54)
Mounting Pad Layout
0.060 MIN
(1.52 MIN)
0.094 MAX
(2.38 MAX)
0.177 (4.50)
0.157 (3.99)
Dimensions in inches
and (millimeters)
0.012 (0.305)
0.006 (0.152)
0.050 MIN
(1.27 MIN)
0.090 (2.29)
0.078 (1.98)
0.220 REF
(5.58)
0.060 (1.52)
0.030 (0.76)
0.008 (0.203)
MAX.
Mechanical Data
Case: JEDEC DO-214AC molded plastic body over
passivated chip
Terminals: Solder plated, solderable per MIL-STD-750,
Method 2026
Polarity: The band denotes the cathode, which is positive with
respect to the anode under normal TVS operation
0.208 (5.28)
0.194 (4.93)
Features
• Plastic package has Underwriters Laboratory
Flammability Classification 94V-0
• Protects power IC controllers such as TOPSwitch®
• Glass passivated junction
Mounting Position: Any Weight: 0.002 oz., 0.064 g
• High temperature soldering guaranteed:
250°C/10 seconds at terminals
• Excellent clamping capability
• Available in unidirectional only
Packaging Codes – Options (Antistatic):
51 – 1K per Bulk box, 20K/carton
61 – 1.8K per 7" plastic Reel (12mm tape), 36K/carton
5A – 7.5K per 13" plastic Reel (12mm tape), 75K/carton
Maximum Ratings and Thermal Characteristics TA = 25OC unless otherwise noted.
Parameter
Symbol
SMAJ530
SMAJ550
Unit
Device marking code
HD
SB
Steady state power dissipation(3)
Peak pulse power dissipation(1)(2)(5) (Fig. 1)
Stand-off voltage
PM(AV)
PPPM
VWM
1.0
W
W
Minimum 300
477
495
V
Typical thermal resistance junction-to-lead
Typical thermal resistance junction-to-ambient
Operating junction and storage temperature range
RθJL
27
75
°C/W
°C/W
°C
RθJA
TJ, TSTG
–55 to +150
Electrical Characteristics TA = 25OC unless otherwise noted.
Minimum breakdown voltage at 100µA
V(BR)
530
550
V
V
Max. clamping voltage at 400mA, 10/1000µs-waveform
Maximum DC reverse leakage current at VWM
Typical temperature coefficient of V(BR)
Vc
760
1.0
ID
µA
650
mV°C
Typical capacitance(4)
at 0V
at 200V
90
7.5
CJ
pF
Notes: (1) Non repetitive current pulse per Fig.3 and derated above 25OC per Fig. 2
(2) Mounted on 5.0mm2 copper pads to each terminal
(3) Lead temperature at 75OC = TL
(4) Measured at 1MHZ
(5) Peak pulse power waveform is 10/1000µs.
Document Number 88391
03-Mar-03
www.vishay.com
1
SMAJ530 and SMAJ550
Vishay Semiconductors
formerly General Semiconductor
Ratings and
Characteristic Curves(TA = 25°C unless otherwise noted)
Fig. 2 – Pulse Derating Curve
Fig. 1 – Peak Pulse Power Rating Curve
100
100
Non-repetitive Pulse
Waveform shown in Fig. 3
TA = 25°C
75
50
10
1
25
0
0.1
25
50
75
125
150
175
0
100
0.1µs
1.0µs
10µs
100µs
1.0ms
10ms
td – Pulse Width (sec.)
TA – Ambient Temperature (°C)
Fig. 3 – Pulse Waveform
150
100
50
TJ = 25°C
Pulse Width (td)
tr = 10µsec.
is defined as the point
Peak Value
IPPM
where the peak current
decays to 50% of IPPM
Half Value – IPP
IPPM
2
10/1000µsec. Waveform
as defined by R.E.A.
td
0
1.0
3.0
4.0
0
2.0
t – Time (ms)
Application Notes
•
•
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 TOPSwitch 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.
TOPSwitch is a registered trademark of Power Integrations, Inc.
www.vishay.com
2
Document Number 88391
03-Mar-03
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