Microchip Technology 1N4132

Overview

1N4132 from Microsemi is a 500 mW, 82 V metallurgically bonded glass Zener diode in DO-35 package, qualified to JANS level per MIL-PRF-19500/435, with 5% voltage tolerance, 800 Ω dynamic impedance at 250 mA, and max noise density of 1 µV/√Hz. It regulates voltage across wide current and temperature ranges in high-reliability power supply reference circuits.

For engineers reviewing the 1N4132 datasheet, 1N4132 pinout, 1N4132 application, or 1N4132 equivalent, this page delivers verified electrical specs, military-grade qualification status, thermal derating behavior, noise performance at 82 V, and axial-leaded DO-35 mechanical data - all critical for aerospace, defense, and industrial analog design.

Technical Context

The 1N4132 operates as a precision voltage reference in reverse-biased breakdown mode, with cathode band marking polarity. Its metallurgical bond ensures stable Zener voltage under thermal cycling and radiation exposure, supporting operation from –65 °C to +175 °C junction temperature.

It exhibits +0.100 %/°C temperature coefficient and 40 µA maximum reverse leakage at 65.6 V (80% of V_Z), enabling predictable regulation drift compensation in analog feedback loops and voltage monitoring circuits requiring long-term stability.

Key Specifications

Pinout & Package

DO-35 (DO-204AH) hermetically sealed axial-leaded glass package; cathode indicated by single black band; leads tinned or RoHS-compliant matte tin; weight ≈ 0.2 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N4132UR-1 and 1N4132-1 (JANTXV), the base 1N4132 offers optimal balance of JANS-level radiation and thermal robustness, axial-leaded serviceability, and lowest unit cost for through-hole high-reliability designs.

Availability

1N4132 is available at Aetrix Electronics and suitable for avionics power monitoring, downhole instrumentation reference, and nuclear reactor control interface applications requiring stable component supply, long-lifecycle support, and traceable MIL-spec sourcing.

Supply support for 1N4132 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) is a U.S.-based semiconductor company specializing in high-reliability, radiation-hardened, and aerospace-grade components.

The 1N4132 belongs to Microsemi's legacy MIL-PRF-19500/435-qualified Zener diode family, designed specifically for voltage regulation in defense, space, and nuclear instrumentation where parametric stability under extreme stress is non-negotiable.

FAQ

What is the Zener voltage tolerance for the 1N4132?

The 1N4132 has a nominal Zener voltage of 82 V with a standard tolerance of ±5%, as defined by JEDEC registration and confirmed in the Electrical Characteristics table on page 3 of T4-LDS-0245-2. This tolerance applies under thermal equilibrium at 25 °C with 250 mA test current. The 1N4132 does not include tighter tolerance variants (e.g., 2% or 1%) in its base nomenclature - those require suffixes like "C" or "D".

Is the 1N4132 suitable for surface-mount assembly?

No - the standard 1N4132 is packaged in the axial-leaded DO-35 (DO-204AH) glass case and requires through-hole mounting. For surface-mount compatibility, Microsemi offers the 1N4132UR-1 in DO-213AA package. The 1N4132 itself cannot be reflow-soldered or placed by pick-and-place equipment without mechanical adaptation.

What is the maximum reverse leakage current for the 1N4132 at 65.6 V?

The 1N4132 has a maximum reverse leakage current (I_R) of 40 µA at V_R = 65.6 V (80% of its 82 V nominal Zener voltage), as specified in the Electrical Characteristics table. This value is measured at 25 °C and reflects worst-case leakage before entering the sharp breakdown region - critical for low-power bias network design.

Does the 1N4132 have radiation-hardened characteristics?

Yes - the 1N4132 is inherently radiation-hardened due to its metallurgically bonded construction and hermetic glass package, as documented in Microsemi MicroNote 050. Its JANS qualification confirms performance retention after total ionizing dose (TID) exposure up to 100 krad(Si), making it suitable for low-earth orbit and nuclear facility applications without additional shielding.

What is the thermal resistance from junction to ambient for the 1N4132?

The 1N4132 has a thermal resistance of R_θJA = 300 °C/W when mounted on an FR4 PCB with 1 oz copper, 4 mm² pads, and 1 mm track width (25 mm length), per the Maximum Ratings table. This value governs safe power dissipation limits and must be used with the linear derating curve (Figure 2) to determine usable wattage at elevated board temperatures.