1N3821UR-1 thru 1N3830AUR-1, e3 or
MLL3821 thru MLL3830A, e3
S C O T T S D A L E D I V I S I O N
LEADLESS GLASS ZENER DIODES
*ELECTRICAL CHARACTERISTICS @ 25oC
NOMINAL
MAXIMUM ZENER IMPEDANCE
MAXIMUM
ZENER
CURRENT
IZM
MAXIMUM
REVERSE
CURRENT
TYPICAL
TEMP.COEFF.
OF ZENER
VOLTAGE
ZENER
VOLTAGE
VZ @ IZT
(NOTE 1)
ZENER
TEST
CURRENT
(Note 2)
INDUSTRY
TYPE
NUMBER**
(NOTE 1)
MICROSEM
I PART
NUMBER
(NOTE 3)
IZT
IR @ VR
(Note 3)
ZZT @ IZT
OHMS
ZZK@ IZK= 1 mA
OHMS
αVZ
%/oC
Volt
VOLTS
mA
mA
μA
s
1
1
1
1
1
1
1
1
1
1
1
1
2
2
3
3
3
3
3
3
1N3821UR-1
1N3821AUR-1
1N3822UR-1
1N3822AUR-1
1N3823UR-1
1N3823AUR-1
1N3824UR-1
1N3824AUR-1
1N3825UR-1
1N3825AUR-1
1N3826UR-1
1N3826AUR-1
1N3827UR-1
1N3827AUR-1
1N3828UR-1
1N3828AUR-1
1N3829UR-1
1N3829AUR-1
1N3830UR-1
1N3830AUR-1
MLL3821
MLL3821A
MLL3822
MLL3822A
MLL3823
MLL3823A
MLL3824
MLL3824A
MLL3825
MLL3825A
MLL3826
MLL3826A
MLL3827
MLL3827A
MLL3828
MLL3828A
MLL3829
MLL3829A
MLL3830
MLL3830A
3.3
3.3
3.6
3.6
3.9
3.9
4.3
4.3
4.7
4.7
5.1
5.1
5.6
5.6
6.2
6.2
6.8
6.8
7.5
7.5
76
76
69
69
64
64
58
58
53
53
49
49
45
45
41
41
37
37
34
34
10
10
10
10
9
9
9
9
8
8
7
7
5
5
2
2
400
400
400
400
400
400
400
400
500
500
550
550
600
600
700
700
500
500
250
250
414
414
378
378
357
357
320
320
291
291
267
267
243
243
219
219
200
200
182
182
100
100
100
100
50
50
10
10
10
10
10
10
10
10
10
10
10
-.066
-.066
-.058
-.058
-.046
-.046
-.033
-.033
-.015
-.015
+/-.010
+/-.010
+.030
+.030
+.049
+.049
+.053
+.053
+.057
+.057
1.5
1.5
1.5
1.5
10
10
10
* JEDEC registered data for 1N3821 thru 3830A equivalents except for lower reverse (leakage) current IR and higher maximum zener current IZM
.
** When applicable, add MQ, MX, or MV prefix to the 1N3821AUR-1 thru 1N3828AUR-1 part numbers for screening options in accordance with MIL-PRF-19500/115.
NOTE 1: Suffix A signifies a +/-5% tolerance on nominal zener voltage. No suffix designates +/-10% tolerance. If tighter tolerance is
required, suffix C is used to identify +/-2%; and suffix D is to identify +/-1% tolerance. VZ is measured with the diode in
thermal equilibrium in 25oC still air. The test currents (IZT) at the listed nominal zener voltages provide a constant 0.25 watts
for this device series per JEDEC registration.
NOTE 2: The zener impedance is derived when a 60 cycle 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. See MicroNote 202 for variation in dynamic impedance with different
zener currents.
NOTE 3: This product series has been previously identified as MLL3821 thru MLL3830A by Microsemi. This alternate name
may still be used, however the Industry name of 1N3821UR-1 thru 1N3830UR-1 is preferred.
Copyright © 2006
Microsemi
Page 2
3-12-2006 REV C
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503