SMAJ4460 thru SMAJ4496, e3
and SMAJ6485 thru SMAJ6491, e3
1.5 Watt Zener Diodes
SCOTTSDALE DIVISION
DESCRIPTION
This 1.5 watt zener series in a low-profile light-weight plastic surface mount
configuration, with stress-relief J-bend contacts, meets or exceeds the electrical
performance of the 1N4460 thru 1N4496 and 1N6485 thru 1N6491. It also provides
double the overall surge performance by using a larger active die element. This
includes ESD protection per IEC61000-4-2, EFT protection per IEC61000-4-4, and
higher surge levels defined herein. The low-flat profile provides easier insertion or
automatic handling compared to other MELF style packages. Its thermally efficient
design lowers junction temperatures and extends operating temperature range
before derating begins. Power derates to zero at 150°C for these plastic packages.
IMPORTANT:
For the most current data, consult
MICROSEMI’s
website:
http://www.microsemi.com
SURFACE MOUNT
ZENER
WWW .
Microsemi
.C
OM
DO-214BA or AC
(SMAJ)
FEATURES
•
•
•
•
•
Zener voltages: 3.3 volts to 200 volts
Metallurgically bonded
Reliability data per JESD22-A108, JESD22-A104,
JESD22-A113-B, JESD22-A101-B, and JESD22-A102
Thermally efficient surface mount with J-bends for
stress relief (flat handling surface for easier placement)
Options for screening in accordance with MIL-PRF-
19500/406 for JAN, JANTX, and JANTXV are available
by adding MQ, MX, or MV prefixes respectively to part
numbers. For example, designate a MXSMAJ4460 for a
JANTX screen.
RoHS Compliant devices available by adding “e3” suffix
APPLICATIONS / BENEFITS
•
For high reliability voltage regulation in low profile
surface mount locations requiring easy
placement and strain relief
•
Light weight for airborne or satellite applications
•
Superior surge quality to protect from ESD and
EFT transients per IEC61000-4-2 and -4-4 and
higher surge levels defined herein
MECHANICAL AND PACKAGING
•
Molded epoxy package meets UL94V-0
•
Terminals: Tin-lead or RoHS compliant annealed
matte-Tin plated solderable per MIL-STD-750,
method 2026
•
Body marked with P/N without SMAJ letters
(ie. 4460, 4496, 6485, 4460, etc.)
•
Polarity is indicated by cathode band
•
Weight: 0.064 grams (approximate)
•
Tape & Reel packaging per EIA-481-2 with 12
mm tape and 2500 units per reel (13 inch reel)
•
MAXIMUM RATINGS
•
•
•
•
•
Operating temperature: -55°C to +150°C
Storage temperature: -55°C to +150°C
1.5 watt steady-state maximum power
Thermal resistance, R
θJL
= 15 °C/W
Solder Temperatures: 260ºC for 10 s (maximum)
POWER DERATING – OUTLINE – MOUNTING PAD
Maximum Power Dissipation (Watts)
DIM
DIMENSIONS
MILLIMETERS
INCHES
MIN
MAX
MIN
MAX
.052
.103
1.32
2.62
.160
.180
4.06
4.57
.100
.110
2.54
2.79
.194
.216
4.93
5.49
.078
.115
1.98
2.92
.030
.060
0.76
1.52
--
.005
--
0.13
2.5
2.0
1.5
1.0
0.5
A
B
C
D
E
F
G
SMAJ4460 – SMAJ4496 &
SMAJ6485 – SMAJ6491
DIMENSION A IS WITHIN DO-214BA BUT HIGHER THAN
STANDARD JEDEC OUTLINES..DIMENSION B IS WIDER
THAN BOTH JEDEC OUTLINES FOR LOWER THERMAL
RESISTANCE
25
50
75 100 125 150 175 200
Outline
T
L
, Lead Temperature (ºC) 3/8” from body
Figure 1. Power Derating Curve
Mounting Pad
Copyright
©
2007
6-20-07 REV B
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 1
SMAJ4460 thru SMAJ4496, e3
and SMAJ6485 thru SMAJ6491, e3
1.5 Watt Zener Diodes
SCOTTSDALE DIVISION
ELECTRICAL CHARACTERISTICS @ 25 °C (unless otherwise specified)
ZENER
VOLTAGE
V
Z
@ I
ZT
MICROSEMI
PART NUMBER
VOLTS
mA
NOM.
MAX
MAX
MAX
OHMS
OHMS
mA
μA
VOLTS
mA
TEST
CURRENT
I
ZT
DYNAMIC
IMPEDANCE
Z
ZT
= I
ZT
KNEE
IMPEDANCE
Z
ZK
= I
ZK
TEST
CURRENT
I
ZK
REVERSE
CURRENT
I
R
@ V
R
TEST
VOLTAGE
V
R
MAXIMUM
CONTINOUS
CURRENT
MAXIMUM
SURGE
CURRENT at
8.3 ms square
wave
T
A
= 25 °C
A
MAXIMUM
SURGE
CURRENT at
8.3 ms square
wave
T
A
= 100 °C
A
WWW .
Microsemi
.C
OM
SMAJ6485
SMAJ6486
SMAJ6487
SMAJ6488
SMAJ6489
SMAJ6490
SMAJ6491
SMAJ4460
SMAJ4461
SMAJ4462
SMAJ4463
SMAJ4464
SMAJ4465
SMAJ4466
SMAJ4467
SMAJ4468
SMAJ4469
SMAJ4470
SMAJ4471
SMAJ4472
SMAJ4473
SMAJ4474
SMAJ4475
SMAJ4476
SMAJ4477
SMAJ4478
SMAJ4479
SMAJ4480
SMAJ4481
SMAJ4482
SMAJ4483
SMAJ4484
SMAJ4485
SMAJ4486
SMAJ4487
SMAJ4488
SMAJ4489
SMAJ4490
SMAJ4491
SMAJ4492
SMAJ4493
SMAJ4494
SMAJ4495
SMAJ4496
3.3
3.6
3.9
4.3
4.7
5.1
5.6
6.2
6.8
7.5
8.2
9.1
10
11
12
13
15
16
18
20
22
24
27
30
33
36
39
43
47
51
56
62
68
75
82
91
100
110
120
130
150
160
180
200
76.0
69.0
64.0
58.0
53.0
49.0
45.0
40.0
37.0
34.0
31.0
28.0
25.0
23.0
21.0
19.0
17.0
15.5
14.0
12.5
11.5
10.5
9.5
8.5
7.5
7.0
6.5
6.0
5.5
5.0
4.5
4.0
3.7
3.3
3.0
2.8
2.5
2.0
2.0
1.9
1.7
1.6
1.4
1.2
10
10
9
9
8
7
5
4
2.5
2.5
3
4
5
6
7
8
9
10
11
12
14
16
18
20
25
27
30
40
50
60
70
80
100
130
160
200
250
300
400
500
700
1000
1300
1500
400
400
400
400
500
500
600
200
200
400
400
500
500
550
550
550
600
600
650
650
650
700
700
750
800
850
900
950
1000
1100
1300
1500
1700
2000
2500
3000
3100
4000
4500
5000
6000
6500
7000
8000
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
1.0
0.5
0.5
0.5
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
.25
50
50
35
5
4
1
.50
10
5
1
.50
.30
.30
.30
.20
.05
.05
.05
.05
.05
.05
.05
.05
.05
.05
.05
.05
.05
.05
.05
.025
.025
.025
.025
.025
.025
.025
.025
.025
.025
.025
.025
.025
.025
1.0
1.0
1.0
1.0
1.0
1.0
2.0
3.72
4.08
4.50
4.92
5.46
8.0
8.8
9.6
10.4
12.0
12.8
14.4
16.0
17.6
19.2
21.6
24.0
26.4
28.8
31.2
34.4
37.6
40.8
44.8
49.6
54.4
60.4
65.6
72.8
80.0
88.0
96.0
104
120
128
144
160
433
397
366
332
304
280
255
230
210
191
174
157
143
130
119
110
95
90
79
71
65
60
53
48
43
40
37
33
30
28
26
23
21
19
17
16
14
13
12
11
9.5
8.9
7.9
7.2
-
-
-
-
-
-
-
-
10
9
7.8
6.8
6
5.2
4.8
4.4
3.6
3.2
2.8
2.4
2.2
1.8
1.6
1.5
1.32
1.20
1.08
.96
.90
.84
.78
.70
.64
.58
.52
.46
.40
.38
.36
.32
.28
.24
.20
.16
8.4
7.8
7.2
6.6
6.0
5.4
5
4.6
4.2
3.8
3.4
3.2
2.8
2.6
2.4
2.2
1.9
1.6
1.58
1.42
1.3
1.2
1.06
.96
.86
.80
.74
.66
.60
.56
.52
.46
.42
.38
.34
.32
.28
.26
.24
.22
.19
.178
.158
.144
SMAJ4460 – SMAJ4496 &
4460 – SMAJ4496 &
SMAJ6485 – SMAJ6491
Notes:
1.
2.
3.
4.
No suffix indicates a ±5% tolerance on nominal V
Z
, C denotes a ±2% tolerance, and D denotes a ±1% tolerance.
Zener voltage (V
z
) is measured at T
L
= 30 °C. Voltage measurement to be performed 90 seconds after application of dc current.
The zener impedance is derived from the 60 Hz ac voltage which results when an ac current having an rms value equal to 10% of the
dc zener current (I
ZT
or I
ZK
).
V
f
at 200 mA 1.2 volts maximum and V
f
at 1.0 A 1.5 volts maximum.
MMAD1103
Copyright
©
2007
6-20-07 REV B
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 2
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