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參數資料
| 型號： | JAN1N4557D |
| 廠商： | MICROSEMI CORP-SCOTTSDALE |
| 元件分類： | 齊納二極管 |
| 英文描述： | 3.9 V, SILICON, UNIDIRECTIONAL VOLTAGE REGULATOR DIODE, TO-204AD |
| 封裝： | HERMETIC SEALED, TO-3, 2 PIN |
| 文件頁數： | 3/4頁 |
| 文件大?。?/td> | 408K |
| 代理商： | JAN1N4557D |
50 Watt Zener Diodes
SCOTTSD A L E DIVISION
1N2804 thru 1N2846B and
1N4557 thru 1N4564B
W
.Mi
cr
os
em
i
.C
O
M
1N2
804
-
4
6B
&
1N4
557
B
–
6
4B
NOTES:
1.
The JEDEC type numbers shown (B suffix) have a +/- 5% tolerance on nominal zener voltage. The suffix A is used to identify +/-10%
tolerance; no suffix indicates +/-20% tolerance. If tighter tolerance is required, consult factory. Standard polarity units have the anode
connected to the case. Reverse polarity (cathode-to-case) units are available and are indicated by suffix R in the part number.
2.
Zener Voltage (VZ) is measured with junction in thermal equilibrium with 30
oC base temperature. The test currents (IZT) have been selected
so that at nominal voltages the dissipation is a constant 12.5 watts. This results in a nominal junction temperature rise of 18.75
oC .
3.
The zener impedance is derived from the 60 cycle ac voltage, which results when an ac current having an rms value equal to 10% of the dc
zener current (IZT or IZK) is superimposed on IZT or IZK. Zener impedance is measured at 2 points to ensure a sharp knee on the breakdown
curve and to eliminate unstable units. A curve showing the variation of zener impedance vs. zener current for six representative types is
shown in Figure 3. Also see MicroNote 202 for further information.
4.
The values of IZM are calculated for a +/-5% tolerance on nominal zener voltage. Allowance has been made for the rise in zener voltage
above VZT that results from zener impedance and the increase in junction temperature as power dissipation approaches 50 watts. In the
case of individual diodes, IZM is that value of current that results in a dissipation of 50 watts.
GRAPHS AND CIRCUITS
Typical circuit connections for anode-to-case and
cathode-to-case polarities (standard and reverse
polarities, respectively).
Rated
Po
w
e
rDissipation
-
W
atts
Case
Temperature
oC
FIGURE 2
POWER DERATING CURVE
FIGURE GROUP 3
TYPICAL ZENER IMPEDANCE vs. ZENER CURRENT FOR TYPES SHOWN
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 3
Copyright
2003
2-19-2004 REV B
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| JANTXV1N2806C | 8.2 V, SILICON, UNIDIRECTIONAL VOLTAGE REGULATOR DIODE, TO-204AD |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| JAN1N4558B | 制造商:Microsemi Corporation 功能描述:Diode Zener Single 4.3V 5% 50W 3-Pin(2+Tab) TO-3 制造商:Microsemi Corporation 功能描述:ZENER VOLTAGE REGULATOR DIODE - Bulk |
| JAN1N4559B | 制造商:Microsemi Corporation 功能描述:ZENER SGL 4.7V 5% 50W 2PIN TO-3 - Bulk |
| JAN1N4560B | 制造商:Microsemi Corporation 功能描述:Diode Zener Single 5.1V 5% 50W 3-Pin(2+Tab) TO-3 制造商:Microsemi Corporation 功能描述:ZENER SGL 5.1V 5% 50W 2PIN TO-3 - Bulk |
| JAN1N4561B | 制造商:Microsemi Corporation 功能描述:ZENER VOLTAGE REGULATOR DIODE - Bulk |
| JAN1N4562B | 制造商:Microsemi Corporation 功能描述:Diode Zener Single 6.2V 5% 50W 3-Pin(2+Tab) TO-3 制造商:Microsemi Corporation 功能描述:ZENER SGL 6.2V 5% 50W 2PIN TO-3 - Bulk |
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