Microchip Technology 1PMT5927B/TR13

Overview

1PMT5927B/TR13 from Microsemi is a 12 V, ±5% tolerance surface-mount Zener diode in the Powermite® package, rated for 3.0 W DC power dissipation at TAB 1 = 60°C, with 6.5 Ω dynamic impedance at 31.2 mA test current and 1 µA max reverse leakage at 9.1 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails of industrial control modules.

For engineers reviewing the 1PMT5927B/TR13 datasheet, 1PMT5927B/TR13 pinout, 1PMT5927B/TR13 application, or 1PMT5927B/TR13 equivalent, key selection criteria include zener voltage tolerance, thermal resistance (30°C/W junction-to-TAB1), ESD rating (>16 kV HBM), low knee impedance (550 Ω at 0.25 mA), and compatibility with EIA-481 tape-and-reel automated assembly.

Technical Context

This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across its specified test current range. Its Powermite® package integrates a full metallic bottom and locking tab to enhance thermal conduction and mechanical stability during reflow soldering.

The device exhibits low reverse leakage (≤1 µA at VR = 9.1 V), a sharp knee characteristic (IZK = 0.25 mA, ZZK = 550 Ω), and stable performance across –55°C to +150°C junction temperature range - enabling reliable operation in thermally demanding embedded power management circuits.

Key Specifications

Pinout & Package

Package: Powermite® surface-mount molded package with full metallic bottom and integral heat sink locking tab; cathode designated by TAB 1; mounting position unrestricted; weight ≈ 0.016 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1PMT5927B/TR13, the 1N5927B requires PCB redesign for through-hole mounting and offers inferior thermal performance, while the 1N5349B trades SMT compatibility and ESD robustness for higher power - making 1PMT5927B/TR13 optimal for space-constrained, automated, and ESD-sensitive applications.

Availability

1PMT5927B/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and medical infusion pump designs requiring stable component supply, consistent Zener voltage tolerance, and automated assembly compatibility.

Supply support for 1PMT5927B/TR13 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 semiconductor manufacturer specializing in high-reliability analog, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.

The Powermite® Zener diode product line was designed for high-power-density, thermally efficient voltage regulation in space-constrained SMT applications where traditional axial or DO-41 packages cannot meet thermal or assembly requirements.

FAQ

What is the Zener voltage tolerance of the 1PMT5927B/TR13?

The 1PMT5927B/TR13 has a standard Zener voltage tolerance of ±5% at 12.0 V, measured at IZT = 31.2 mA and TAB 1 temperature of 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D respectively, but the TR13 variant uses the standard ±5% grade. This tolerance ensures predictable regulation in power supply feedback and reference circuits without requiring post-manufacturing calibration.

How is thermal management handled in the 1PMT5927B/TR13 package?

The 1PMT5927B/TR13 uses the Powermite® package with a full metallic bottom and integral locking tab that acts as a primary heat sink. Its junction-to-TAB1 thermal resistance is 30°C/W, meaning TAB 1 must be soldered to a sufficient copper area to maintain junction temperature within –55°C to +150°C limits. Unlike plastic-bottom SMD diodes, the metallic base eliminates flux entrapment and improves thermal conduction directly into the PCB.

Is the 1PMT5927B/TR13 compatible with automated SMT assembly processes?

Yes, the 1PMT5927B/TR13 is fully compatible with automated insertion equipment and EIA-481 tape-and-reel packaging (7-inch reel, 3,000 pieces). Its Powermite® package geometry, symmetric lead configuration, and locking tab design ensure stable placement and reliable reflow soldering. The full metallic bottom also prevents tombstoning and improves coplanarity yield compared to conventional SOD-123 or DO-216 variants.

What is the maximum reverse leakage current for the 1PMT5927B/TR13?

The maximum reverse leakage current for the 1PMT5927B/TR13 is 1 µA at a reverse voltage (VR) of 9.1 V, tested at TL = 30°C. This low leakage ensures minimal parasitic current draw in high-impedance reference or clamping circuits, preserving accuracy in battery-powered systems and reducing error in precision voltage monitoring applications using the 1PMT5927B/TR13.

Does the 1PMT5927B/TR13 have ESD protection built-in?

Yes, the 1PMT5927B/TR13 has an ESD rating exceeding 16 kV per the Human Body Model (HBM), verified per JEDEC JS-001. This intrinsic robustness eliminates the need for additional discrete ESD suppressors in many front-end protection schemes. The high ESD withstand capability stems from the Powermite® package's metallization and junction design, making the 1PMT5927B/TR13 especially suitable for use in exposed I/O lines and automotive environments.