Microchip Technology 1PMT5936/TR13

Overview

1PMT5936B from Microsemi is a 30 V, 3.0 W surface-mount Zener diode in the Powermite® package, featuring a full metallic bottom, integral heat sink locking tab, and 12.5 mA test current. It delivers tight voltage regulation with 28 Ω dynamic impedance at I_ZT, low reverse leakage (≤1 µA at 22.8 V), and ESD rating >16 kV HBM - used for overvoltage protection and reference voltage generation in power supplies and industrial controls.

For engineers reviewing the 1PMT5936B datasheet, 1PMT5936B pinout, 1PMT5936B application, or 1PMT5936B equivalent, key selection criteria include zener voltage tolerance (±5% standard), thermal resistance (30°C/W junction-to-tab), DC power dissipation (3.0 W with TAB1 at 60°C), and compatibility with EIA-481 tape-and-reel automated assembly.

Technical Context

This Zener diode operates as a precision voltage reference and clamp device, with cathode designated by TAB 1 and rated for junction temperatures from –55°C to +150°C. Its Powermite® package enables high-power density in surface-mount form, leveraging the metallic tab as both mechanical anchor and thermal path.

The device exhibits 28 Ω dynamic impedance at 12.5 mA test current and maintains ≤1 µA reverse leakage up to 22.8 V, supporting stable regulation under varying load and temperature conditions in DC power rails and feedback networks.

Key Specifications

Pinout & Package

Package: Powermite® surface-mount molded package with full metallic bottom and integral heat sink locking tab (TAB 1 = cathode). Dimensions conform to DO-216 outline; weight ≈0.016 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N5936B and MMBZ5256B, the 1PMT5936B uniquely combines surface-mount scalability, 3.0 W dissipation, and 28 Ω dynamic impedance - making it the only option for thermally constrained, high-energy Zener applications in modern industrial PCBs.

Availability

1PMT5936B is available at Aetrix Electronics and suitable for industrial power supplies, automotive electronic control units, telecom line interface protection, and medical diagnostic equipment requiring stable component supply and full traceability.

Supply support for 1PMT5936B 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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.

The Powermite® Zener diode product line was engineered for high-power-density surface-mount voltage regulation and transient suppression in harsh-environment electronics where thermal performance and assembly reliability are critical.

FAQ

What is the zener voltage tolerance for 1PMT5936B?

The standard 1PMT5936B has a zener voltage tolerance of ±5% at 30 V nominal. Tighter tolerances of ±2% (suffix C) and ±1% (suffix D) are available upon request. Voltage is measured at 12.5 mA test current with TAB1 held at 30°C, and readings must be taken within 20 seconds of applying DC current to avoid self-heating effects. The 1PMT5936B datasheet specifies this under Note 1 in MSC0995.PDF.

How is thermal management handled in the 1PMT5936B package?

The 1PMT5936B uses its metallic TAB1 as the primary thermal conduction path, achieving 30°C/W junction-to-tab thermal resistance. Effective cooling requires soldering TAB1 directly to a minimum 100 mm² copper pour or heatsinked PCB layer. Unlike standard SMD diodes, the Powermite® package's full metallic bottom and locking tab eliminate flux voids and enhance thermal transfer - critical for sustaining 3.0 W dissipation. This design is validated in the 1PMT5936B mechanical specifications.

Is the 1PMT5936B compatible with automated SMT assembly processes?

Yes, the 1PMT5936B is fully compatible with automated insertion and reflow processes. It ships in EIA-481 standard tape-and-reel format (3,000 pcs per 7-inch reel or 12,000 per 13-inch reel) and features a locking tab that prevents rotation during pick-and-place. Its DO-216 outline and symmetric lead geometry ensure reliable feeding and placement. These attributes are confirmed in the Packaging and Mechanical Characteristics sections of the 1PMT5936B datasheet MSC0995.PDF.

What is the maximum reverse voltage the 1PMT5936B can withstand before breakdown?

The 1PMT5936B is rated for a maximum reverse voltage (V_R) of 22.8 V, at which reverse leakage remains ≤1 µA. Operation above this voltage initiates controlled zener conduction; the device is designed to regulate stably at 30 V when biased at its 12.5 mA test current. Exceeding 30 V without current limiting risks thermal failure. This behavior is defined in the Electrical Characteristics table for 1PMT5936B in MSC0995.PDF.

Does the 1PMT5936B meet any industry-standard ESD requirements?

Yes, the 1PMT5936B has an ESD rating exceeding 16 kV per the Human Body Model (HBM), as verified per ANSI/ESDA/JEDEC JS-001. This qualifies it for direct integration into electrostatic-sensitive systems such as industrial fieldbus nodes and automotive sensor interfaces without supplemental ESD protection. The specification is explicitly stated in the FEATURES section of the 1PMT5936B datasheet MSC0995.PDF.