1N3312RB

Overview

The JANTXV1N3312RB is a high-power 50 W Zener diode manufactured by Microchip Technology. It provides voltage regulation with a nominal Zener voltage of 13 V and a maximum dynamic impedance of 1.1 Ohms at the test current of 960 mA. The device features reverse polarity, indicated by the 'R' suffix, connecting the cathode to the case. It operates within a junction and storage temperature range of -65°C to +175°C. The component utilizes a DO-5 (DO-203AB) package with a hexagonal stud for mounting.

Feature Summary

• Hermetically sealed welded metal and glass construction
• Internal solder bond design
• Reverse polarity configuration with cathode connected to the case
• Radiation hard characteristics

Applications

• Voltage regulation in military systems
• High power dissipation applications requiring adequate heat sinking
• Circuits operating under extreme temperature conditions

Procurement Notes

Verify the specific ordering requirements directly with the manufacturer or authorized distributors. Confirm that the JANTXV prefix aligns with the required MIL-PRF-19500/358 screening level. Ensure the reverse polarity designation matches the circuit schematic, as standard units feature anode-to-case connections. Validate thermal management capabilities for the intended application environment.

Selection Notes

Select this component when a 13 V regulation point is required with high power handling capabilities. The JANTXV qualification ensures rigorous screening for military-grade reliability. Consider the DO-5 package dimensions and stud thread specifications for mechanical integration. Verify that the system can accommodate the specified thermal resistance and derating curves above 75°C case temperature.

Part Context

This part belongs to the 1N3305 through 1N3350B series of 50 Watt Zener diodes offered by Microchip Technology's Scottsdale Division. The series covers a broad voltage range from 3.9 V to 200 V. The JANTXV1N3312RB specifically denotes the version with JANTXV military qualification and reversed polarity, distinguishing it from standard commercial or lower-qualified variants.

Replacement Considerations

Equivalent parts include 1N3312A and 1N3312B. Note that these alternatives may differ in tolerance levels and qualification standards compared to the JANTXV variant.