Microchip Technology 1N3013RB

Overview

1N3013RB from Microsemi is a 175 V, 10 W hermetically sealed, stud-mounted Zener diode with reverse polarity (cathode-to-stud), qualified to MIL-PRF-19500/124 JANTXV level. It delivers ±5% voltage tolerance, 46 Ω dynamic impedance at 14 mA test current, and operates from –65 °C to +175 °C junction temperature - used in high-reliability voltage regulation for aerospace power supplies and radiation-hardened instrumentation.

For engineers reviewing the 1N3013RB datasheet, 1N3013RB pinout, 1N3013RB application, or 1N3013RB equivalent, this page provides verified military-grade Zener specifications, DO-213AA (DO-4) mechanical details, thermal derating guidance, and direct alternatives with validated polarity and qualification alignment.

Technical Context

This device functions as a precision voltage reference in high-power, high-temperature environments where stability under thermal stress and radiation exposure is critical. Its welded metal-glass hermetic seal ensures long-term reliability in vacuum or corrosive atmospheres, and its 12 °C/W junction-to-case thermal resistance enables efficient heat transfer via stud mounting.

The 1N3013RB exhibits a +0.095 %/°C temperature coefficient and maintains regulation across 10–250 mA Zener current range. Its 10 µA reverse leakage at 135 V confirms low standby loss in high-impedance bias networks typical of analog front-end protection circuits.

Key Specifications

Pinout & Package

Package: DO-213AA (DO-4), hermetically sealed metal-glass stud package with 10-32 UNF–2A threaded stud (anode terminal). Weight: ~7.5 g. Mounting requires torque-limited assembly (≤15 in·lb).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener regulation applications.

Compared with 1N3013B, the 1N3013RB offers identical electrical performance but inverted terminal polarity - enabling direct chassis-grounded cathode configurations without insulating washers. No alternative provides both JANTXV qualification and 175 V rating in DO-4 package with cathode-to-stud orientation.

Availability

1N3013RB is available at Aetrix Electronics and suitable for aerospace power regulation, downhole instrumentation, military radar clamping, and high-voltage test equipment requiring stable component supply across extended temperature and radiation environments.

Supply support for 1N3013RB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Microsemi Corporation (now part of Microchip Technology) specializes in high-reliability analog and RF semiconductors for aerospace, defense, and industrial markets.

The 1N3013RB belongs to Microsemi's legacy MIL-PRF-19500/124 qualified Zener diode family, engineered for voltage regulation in mission-critical systems demanding radiation tolerance, hermetic sealing, and extreme temperature operation.

FAQ

What does the "RB" suffix mean in 1N3013RB?

The "RB" suffix in 1N3013RB indicates reverse polarity: cathode is connected to the threaded stud, while the lead wire is the anode. This configuration allows direct mounting to a grounded chassis for shunt regulation without insulating hardware - a key distinction from the standard 1N3013B (anode-to-stud). The 1N3013RB retains identical Zener voltage, power rating, and JANTXV qualification as its standard-polarity counterpart.

Is 1N3013RB RoHS compliant?

No - the 1N3013RB is not RoHS compliant. RoHS-compliant versions of this family require the "e3" suffix (e.g., 1N3013RBe3), which is available only for commercial-grade variants. The 1N3013RB carries JANTXV military qualification and uses traditional tin-lead plating per MIL-PRF-19500/124 requirements, making it exempt from RoHS restrictions for defense applications.

What is the maximum allowable stud temperature for continuous operation of 1N3013RB?

The 1N3013RB is rated for continuous operation with stud temperature (T_C) up to +55 °C at full 10 W dissipation. Above +55 °C, power must be linearly derated at 0.083 W/°C - meaning at +105 °C stud temperature, maximum safe dissipation drops to 6.6 W. This derating ensures junction temperature remains within the –65 °C to +175 °C limit, preserving long-term reliability in conduction-cooled systems.

Can 1N3013RB replace 1N3013B in an existing design?

Yes - 1N3013RB can replace 1N3013B electrically and thermally, but polarity reversal must be verified in the circuit layout. Since 1N3013RB has cathode-to-stud versus 1N3013B's anode-to-stud, the mounting interface and grounding scheme must accommodate reversed terminal assignment. No changes to voltage rating, power handling, or qualification level are needed - only mechanical and grounding validation.

What is the Zener test current (I_ZT) and dynamic impedance (Z_ZT) for 1N3013RB?

For 1N3013RB, the Zener test current (I_ZT) is 14 mA, and the dynamic impedance (Z_ZT) is 46 Ω measured at that current. This low impedance value ensures tight regulation under varying load conditions - critical for precision references in analog signal conditioning and feedback loops where <1% output variation is required across operating current ranges.