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Littelfuse |
Silicon Avalanche Diodes
1500 Watt Metal Axial Leaded Transient Voltage Suppressors
1N56 Series
FEATURES
• Hermetically sealed
• Breakdown voltage range 6.8 - 200 volts
• Glass passivated junction
• Excellent clamping capability
• Low zener impedance
•100% surge tested
•-55°C to +150°C
•Uni-polar
MAXIMUM RATING
•Peak Pulse Power (Ppk): 1500 Watts (10 x 1000µs)@25°C
(see diagram on page 3 for wave form)
•1 watt steady state
•Response time: 1 x 10-12 seconds (theoretical)
•Operating & storage temperature: -55°C to +150°C
MECHANICAL CHARACTERISTICS
•Case: Metal hermetically sealed DO-13 package
•Terminals: Axial leads, solderable per MIL-STD-202
Method 208
•Solderable leads = 230°C for 10 seconds (1.59mm from case)
•Polarity: cathode indicated by colour band
•Weight: 1.5 grammes (approx)
Agency Approvals: Recognized under the Components
Program of Underwriters Laboratories.
Agency File Number: E128662
ORDERING INFORMATION
1N 56 X X A
Voltage Reference
5% Voltage Tolerance
Packaging Option
B = Bulk (500 pcs)
®
6
Min 31.8
7.5
9.0
Min 25.4
Max
5.33
Max
0.8
5.58
All dimensions in mm
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313
Silicon Avalanche Diodes
1500 Watt Metal Axial Leaded Transient Voltage Suppressors
1N56 Series
®
100%
50%
Permissable
area of
operation
0
0 °C
50°C
100°C
Tamb °C
150°C
Figure 1 - Peak Power Derating Curve
Peak pulse power in percent of 25ºC rating
200°C
W
1.0
0.75
0.50
Permissable
area of
operation
0.25
0
0°C
50°C
100°C
Tamb °C
150°C
Figure 2 - Continuous D.C. Power Derating
CurveContinuous d.c. power dissipation
200°C
100
Exponential wave-form
10
Square wave-pulse
1
0.1
100ns 1µs
10µs
100µs
Pulse Time (tp)
Figure 3 - Peak Pulse Power vs. Pulse Time
1ms
10ms
20,000
10,000
6000
4000
Measured @
Zero Bias
2000
1000
800
600
400
Cj (pf)
200
100
80
60
40
Measured at
Stand-Off
Voltage (VR)
30
10
1.0 2 5 10 20 50 100 200
Reverse Voltage, Volts V(BR)
Figure 4 - Typical Junction Capacitance
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