SMAJ6485 thru SMAJ6491
SMAJ4460 thru SMAJ4476
Transient Voltage Suppressor
Breakdown Voltage 3.3V to 30V
CASE: SMA (DO214AC)
Features
Zener Voltages selection from 3.3V to 30V
1.5 Watt Zener Diodes
Ideal for high-density and low-profile mounting
Regulates voltage over a broad operating current
and temperature range
Flexible axial-lead mounting terminals
High specified maximum current(IZM) when
adequately heat sinking
Application
Dimensions in inches and (millimeters)
Maximum Ratings and Electrical Characteristics
@
Symbol
P
M(AV)
V
F
R
θJL
T
J,
T
STG
Conditions
Steady state maximum power
印
打
Use in sensitive electronics protection against voltage
transients induced by inductive load switching and
lighting on IC
S
, MOSFE, signal lines of sensor units
for consumer, computer, industrial, automotive and
telecommunication
Mechanical Data
Case:
Void-free transfer molded thermosetting epoxy
body meeting UL94V-O
Terminals:
Tin-Lead or ROHS Compliant annealed
matte-Tin plating readily solderable per MIL-STD-750,
Method 2026
Marking:
Body marked with part number
Polarity:
Cathode indicated by band
Weight:
0.053g（Approximately）
25
O
C unless otherwise specified
效
无
Value
1.5
1.2
15
-65 to +150
Unit
W
V
℃/W
℃
Maximum instantaneous forward voltage at 200mA
Thermal resistance junction to lead
Operating and Storage Temperature
Document Number: SMAJ6485 thru SMAJ6491, SMAJ4460 thru SMAJ4476
Feb.29, 2012
1
www.smsemi.com
SMAJ6485 thru SMAJ6491
SMAJ4460 thru SMAJ4476
Electrical Characteristics @ 25° (Unless Otherwise Noted)
C
Maximum
Surge
Current at
8.3ms
square
Wave
T
A
=25℃
I
ZSM
(A)
-
-
-
-
-
-
-
-
10
9
7.8
6.8
6.0
5.2
4.8
4.4
3.6
3.2
2.8
2.4
2.2
1.8
1.6
1.5
Maximum
Surge
Current
at 8.3ms
square
Wave
T
A
=100℃
I
ZSM
(A)
8.4
7.8
7.2
6.6
6.0
5.4
5.0
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
0.96
Microsemi
Part
Number
Zener
Voltage
V
Z
@ I
ZT
Test
Current
Maximum
Dynamic
Impedance
Z
ZT
=I
ZT
Z
ZT
(OHMS)
10.0
10.0
9.0
9.0
8
7
5
4
2.5
2.5
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
11.0
12.0
14.0
16.0
18.0
20.0
Maximum
Knee
Impedance
Z
Zk
=I
Zk
Z
ZK
(OHMS)
400
400
400
400
500
500
600
200
200
400
400
500
500
550
550
550
600
600
650
650
650
700
700
750
Knee
Current
Maximum
Reverse
Current
I
R
@ V
R
I
R
(µA)
50.0
50.0
35.0
5.00
4.00
1.00
0.50
10.0
5.00
1.00
0.50
0.30
0.30
0.30
0.20
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
0.05
V
R
(V)
1.00
1.00
1.00
1.00
1.00
1.00
2.00
3.72
4.08
4.50
4.92
5.46
8.00
8.80
9.60
10.4
12.0
12.8
14.4
16.0
17.6
19.2
21.6
24.0
Maximum
Continous
Current
SMAJ6485
SMAJ6486
SMAJ6487
SMAJ6488
SMAJ6489
SMAJ6490
SMAJ6491
SMAJ4460
SMAJ4461
SMAJ4462
SMAJ4463
SMAJ4464
SMAJ4465
SMAJ4466
SMAJ4467
SMAJ4468
SMAJ4469
SMAJ4470
SMAJ4471
SMAJ4472
SMAJ4473
SMAJ4474
SMAJ4475
SMAJ4476
Note:
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 T
L
=30℃. Voltage measurement to be performed 90 seconds after application of dc current.
3. The Zener impedance is derived from the 60H
Z
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
)
.
4. V
F
at 200mA 1.2 volts maximum and V
F
at 1.0A 1.5 volts maximum.
Characteristic Curve
2.0
Maximum Power Dissipation (W)
1.5
印
打
0
50
100
Lead Temperature (℃)
150
200
V
Z
(V)
3.3
3.6
3.9
4.3
4.7
5.1
5.6
6.2
6.8
7.5
8.2
9.1
10.0
11.0
12.0
13.0
15.0
16.0
18.0
20.0
22.0
24.0
27.0
30.0
I
ZT
(mA)
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
I
ZK
(mA)
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
1.00
0.50
0.50
0.50
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
0.25
效
无
www.smsemi.com
I
ZM
mA
433
397
366
332
304
280
255
230
210
191
174
157
143
130
119
110
95
90
79
71
65
60
53
48
1.0
0.5
0
Fig.1 Power Derating Curve
Document Number: SMAJ6485 thru SMAJ6491, SMAJ4460 thru SMAJ4476
Feb.29, 2012
2
Embedded System
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