Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 1
Copyright 2001
MSCXXXX.PDF 4-07-03 REV A
WWW.
Microsemi
.COM
SMAJ4460 thru SMAJ4496
and SMAJ6485 thru SMAJ6491
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
POWER DERATING – OUTLINE – MOUNTING PAD
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, JANTXV, and JANS are
available by adding MQ, MX, MV, or MSP prefixes
respectively to part numbers. For example, designate a
MXSMAJ4460 for a JANTX screen.
MAXIMUM RATINGS
• Operating temperature: -55°C to +150°C
• Storage temperature: -55°C to +150°C
• 1.5 watt steady-state maximum power
•
Thermal resi
stance, R
?JL
= 15 °C/W
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: solderable per MIL-STD-750
Method 2026. (max 260 °C for 10 sec.)
• 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 u
nits per reel (13 inch reel)
SURFACE MOUNT
ZENER
DO-214BA or AC
(SMAJ)
DIMENSIONS
INCHES MILLIMETERS
DIM MIN MAX MIN MAX
A .052 .103 1.32 2.62
B .160 .180 4.06 4.57
C .100 .110 2.54 2.79
D .194 .216 4.93 5.49
E .078 .115 1.98 2.92
F .030 .060 0.76 1.52
G -- .005 -- 0.13
DIMENSION A IS WITHIN DO-214BA BUT HIGHER THAN
STANDARD JEDEC OUTLINES..DIMENSION B IS WIDER
THAN BOTH JEDEC OUTLINES FOR LOWER THERMAL
RESISTANCE
SMAJ4460 – SMAJ4496 &
SMAJ6485 – SMAJ6491
Mounting Pad
Outline
Microsemi
Scottsdale Division
8700 E. Thomas Rd. PO Box 1390, Scottsdale, AZ 85252 USA, (480) 941-6300, Fax: (480) 947-1503
Page 2
Copyright 2001
MSCXXXX.PDF 4-07-03 REV A
WWW.
Microsemi
.COM
SMAJ4460 thru SMAJ4496
and SMAJ6485 thru SMAJ6491
1.5 Watt Zener Diodes
SCOTTSDALE DIVISION
SMAJ4460 – SMAJ4496 &
SMAJ6485 – SMAJ6491
ELECTRICAL CHARACTERISTICS @ 25 °C (unless otherwise specified)
MICROSEMI
PART NUMBER
ZENER
VOLTAGE
VZ @ IZT
VOLTS
NOM.
TEST
CURRENT
IZT
mA
DYNAMIC
IMPEDANCE
ZZT = IZT
OHMS
MAX
KNEE
IMPEDANCE
ZZK = IZK
OHMS
MAX
TEST
CURRENT
IZK
mA
REVERSE
CURRENT
IR @ VR
µA
MAX
TEST
VOLTAGE
VR
VOLTS
MAXIMUM
CONTINOUS
CURRENT
mA
MAXIMUM
SURGE
CURRENT at
8.3 ms square
wave
TA = 25 °C
A
MAXIMUM
SURGE
CURRENT at
8.3 ms square
wave
TA = 100 °C
A
SMAJ6485 3.3 76.0 10 400 1.0 50 1.0 433 - 8.4
SMAJ6486 3.6 69.0 10 400 1.0 50 1.0 397 - 7.8
SMAJ6487 3.9 64.0 9 400 1.0 35 1.0 366 - 7.2
SMAJ6488 4.3 58.0 9 400 1.0 5 1.0 332 - 6.6
SMAJ6489
4.7 53.0 8 500 1.0 4 1.0 304 - 6.0
SMAJ6490 5.1 49.0 7 500 1.0 1 1.0 280 - 5.4
SMAJ6491 5.6 45.0 5 600 1.0 .50 2.0 255 - 5
SMAJ4460 6.2 40.0 4 200 1.0 10 3.72 230 - 4.6
SMAJ4461
6.8 37.0 2.5 200 1.0 5 4.08 210 10 4.2
SMAJ4462 7.5 34.0 2.5 400 0.5 1 4.50 191 9 3.8
SMAJ4463 8.2 31.0 3 400 0.5 .50 4.92 174 7.8 3.4
SMAJ4464
9.1
28.0 4 500
0.5
.30 5.46 157 6.8 3.2
SMAJ4465 10 25.0 5 500
.25
.30 8.0 143 6 2.8
SMAJ4466 11 23.0 6 550
.25
.30 8.8 130 5.2 2.6
SMAJ4467 12 21.0 7 550
.25
.20 9.6 119 4.8 2.4
SMAJ4468 13 19.0 8 550
.25
.05 10.4 110 4.4 2.2
SMAJ4469 15 17.0 9 600
.25
.05 12.0 95 3.6 1.9
SMAJ4470 16 15.5 10 600
.25
.05
12.8
90 3.2 1.6
SMAJ4471 18 14.0 11 650
.25
.05 14.4 79 2.8 1.58
SMAJ4472 20 12.5 12 650
.25
.05 16.0 71 2.4 1.42
SMAJ4473 22 11.5 14 650
.25
.05 17.6 65 2.2 1.3
SMAJ4474 24 10.5 16 700
.25
.05 19.2 60 1.8 1.2
SMAJ4475 27 9.5 18 700
.25
.05 21.6 53 1.6 1.06
SMAJ4476 30 8.5 20 750
.25
.05 24.0 48 1.5 .96
SMAJ4477 33 7.5 25 800
.25
.05 26.4 43 1.32 .86
SMAJ4478 36 7.0 27 850
.25
.05 28.8 40 1.20 .80
SMAJ4479 39 6.5 30 900
.25
.05 31.2 37 1.08 .74
SMAJ4480 43 6.0 40 950
.25
.05 34.4 33 .96 .66
SMAJ4481 47 5.5 50 1000
.25
.05 37.6 30 .90 .60
SMAJ4482 51 5.0 60 1100
.25
.05 40.8 28 .84 .56
SMAJ4483 56 4.5 70 1300
.25
.025 44.8 26 .78 .52
SMAJ4484 62 4.0 80 1500
.25
.025 49.6 23 .70 .46
SMAJ4485 68 3.7 100 1700
.25
.025 54.4 21 .64 .42
SMAJ4486 75 3.3 130 2000
.25
.025 60.4 19 .58 .38
SMAJ4487 82 3.0 160 2500
.25
.025 65.6 17 .52 .34
SMAJ4488 91 2.8 200 3000
.25
.025 72.8 16 .46 .32
SMAJ4489 100 2.5 250 3100
.25
.025 80.0 14 .40 .28
SMAJ4490 110 2.0 300 4000
.25
.025 88.0 13 .38 .26
SMAJ4491 120 2.0 400 4500
.25
.025 96.0 12 .36 .24
SMAJ4492 130 1.9 500 5000
.25
.025 104 11 .32 .22
SMAJ4493 150 1.7 700 6000
.25
.025 120 9.5 .28 .19
SMAJ4494 160 1.6 1000 6500
.25
.025 128 8.9 .24 .178
SMAJ4495 180 1.4 1300 7000
.25
.025 144 7.9 .20 .158
SMAJ4496 200 1.2 1500 8000
.25
.025 160 7.2 .16 .144
Notes:
1. No suffix indicates a ±5% tolerance on nominal VZ, C denotes a ±2% tolerance, and D denotes a ±1% tolerance.
2. Zener voltage (V z) is measured at TL = 30 °C. Voltage measurement to be performed 90 seconds after application of dc current.
3. 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 (IZT or IZK).
4. Vf at 200 mA 1.2 volts maximum and Vf at 1.0 A 1.5 volts maximum.
