1N4460 Diode Temperature-Current Derating Curve [Axial Lead]
Zener Voltage Regulator Diode, DO-41 package.
DO-41 Diode Derating Curves
Use the chart to determine how much to derate power [wattage] based on ambient operational temperature.
Guidelines for derating diodes, additional
Diode Derating Curves
The above chart details the maximum allowable power dissipation with increasing ambient temperature for an axial leaded DO-41 package. Maximum operational power dissipation is achievable up to 500C. However above 500C the maximum package dissipation, or power, must be reduce to insure that the devices junction temperature remains constant. The higher the ambient temperature is increased the lower the allowable power dissipation, as depicted in the curves.
Although some of the curves extend past 50C, the safest curve to use is the lowest gray curve which provides the longest life.
Lead length is also important in conducting heat, use the length shown in the graph, 3/8"
Refer to MIL-PRF-19500/406H; Semiconductor Device, Diode, Silicon, Voltage Regulator, Types 1N4460, 1N4460C, 1N4460D through 1N4496, 1N4496C, 1N4496D, and 1N6485, 1N6485C, 1N6485D through 1N6491, 1N6491C, 1N6491D, 1N4460US, 1N4460CUS, 1N4460DUS through 1N4496US, 1N4496CUS, 1N4496DUS, and 1N6485US, 1N6485CUS, 1N6485DUS through 1N6491US, 1N6491CUS, 1N6491DUS, Plus C and D Tolerance Suffix; JAN, JANTX, JANTXV, and JANS, [DO-41 Axial Leaded]
1N4460 Maximum Operational Ratings:
Maximum Repetitive Reverse Voltage = xx volts [Device Dependent]
Average Rectified Forward Current = xx mA [Device Dependent]
Power Dissipation 250C = 1.5 Watts
Operating Temperature = -650C to +1750C
Zener Diodes covered by this graph:
1.5 watt silicon, low leakage, voltage regulator diodes
1N4460, 1N4461, 1N4462, 1N4463, 1N4464, 1N4465, 1N4466, 1N4467, 1N4468, 1N4469,
1N4470, 1N4471, 1N4472, 1N4473, 1N4474, 1N4475, 1N4476, 1N4477, 1N4478, 1N4479,
1N4480, 1N4481, 1N4482, 1N4483, 1N4484, 1N4485, 1N4486, 1N4487, 1N4488, 1N4489,
1N4490, 1N4491, 1N4492, 1N4493, 1N4494, 1N4495, 1N4496
Zener Voltage, Vz = 3.3v to 200 volts depending on device.
