1N3010RB

Overview

The Microchip Technology 1N3010RB is a 10W Zener diode with a nominal voltage of 140V and ±5% tolerance. It features reverse polarity (cathode to stud) in a hermetically sealed DO-213AA (DO-4) package. The device operates within a junction temperature range of -65°C to +175°C, dissipating up to 10W at a case temperature of +55°C. Key electrical parameters include a maximum dynamic impedance of 125 Ohms at the test current of 18mA, a maximum reverse leakage current of 10µA, and a forward voltage of 1.5V at 2.0A.

Feature Summary

• Hermetically sealed welded construction for environmental protection
• Internal solder bond design ensuring mechanical stability
• Reverse polarity configuration with cathode connected to the mounting stud
• Radiation hard characteristics suitable for demanding environments

Applications

• Voltage regulation across broad current and temperature ranges
• Military and aerospace electronic systems requiring high reliability
• High-power reference circuits utilizing stud mount thermal management

Procurement Notes

Verify that the specific order includes the RB suffix to confirm reverse polarity orientation. Ensure the required military qualification grade (JAN, JANTX, or JANTXV) is specified during procurement, as commercial versions lack these certifications. Confirm RoHS compliance requirements if applicable, noting that the e3 suffix applies only to commercial grades. Validate that the application environment supports the specified thermal derating curves for power dissipation above +55°C case temperature.

Selection Notes

Select this component when a 140V Zener reference with high power handling is required. The reverse polarity design allows the stud to serve as the cathode terminal, simplifying grounding schemes where the anode connects to the circuit. Consider the 125 Ohm dynamic impedance for noise-sensitive applications. Verify that the mounting hardware accommodates the 10-32 thread size and that torque limits do not exceed 15 inch-pounds to prevent mechanical damage.

Part Context

This part belongs to the 1N2970B through 1N3015B series of 10W Zener diodes manufactured by Microchip Technology. These devices are JEDEC registered and available in various military qualification levels per MIL-PRF-19500/124. The series covers voltage regulation values from 3.9V to 200V, providing a standardized solution for high-voltage regulation needs in ruggedized electronics.

Replacement Considerations

Direct substitutes within the same family include 1N3010B (standard polarity). Cross-manufacturer equivalents require verification of the 10W power rating, 140V nominal voltage, and DO-4 package dimensions. Ensure any replacement matches the reverse polarity requirement or adapts the circuit layout accordingly.