Microchip Technology 1PMT5931CE3/TR13

Overview

1PMT5931CE3/TR13 from Microsemi is a 18 V, ±5% tolerance Zener diode in Powermite® surface-mount package, rated for 3.0 W DC power dissipation at TAB 1 = 60°C, with 12 mA test current (IZT), 650 Ω dynamic impedance (ZZT), and 1 µA max reverse leakage at 13.7 V (VR). It serves as a precision voltage reference or overvoltage clamp in DC power rails and regulator feedback paths.

For engineers reviewing the 1PMT5931CE3/TR13 datasheet, 1PMT5931CE3/TR13 pinout, 1PMT5931CE3/TR13 application, or 1PMT5931CE3/TR13 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (30°C/W junction-to-TAB), ESD rating (>16 kV HBM), low knee impedance, and compatibility with automated SMT assembly per EIA-481 tape-and-reel packaging.

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 = 13.7 V), 30°C/W thermal resistance from junction to TAB 1, and is characterized at TL = 30°C with voltage measurement performed 20 seconds after DC current application per Note 1.

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; weight ≈ 0.016 g; DO-216 outline.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N5931BTR and BZX55-C18, the 1PMT5931CE3/TR13 delivers superior thermal management via its metallic tab, higher power handling (3.0 W vs. 0.5 W or uncharacterized), and verified >16 kV HBM ESD immunity-making it uniquely suited for ruggedized SMT power rail protection and precision reference roles.

Availability

1PMT5931CE3/TR13 is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection circuits, and automated test equipment requiring stable component supply, consistent tape-and-reel delivery, and long-term industrial lifecycle support.

Supply support for 1PMT5931CE3/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 U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.

The Powermite® Zener diode product line-including 1PMT5931CE3/TR13-is engineered for high-power surface-mount voltage regulation and transient suppression in harsh-environment power systems where thermal performance and assembly robustness are critical.

FAQ

What is the Zener voltage tolerance for 1PMT5931CE3/TR13?

The 1PMT5931CE3/TR13 has a standard Zener voltage tolerance of ±5% at 18 V, as confirmed in the MSC0995 datasheet. This tolerance applies under test conditions of IZT = 12 mA and TAB temperature = 30°C. Tighter tolerances (2% and 1%) are available with suffixes C and D, but the CE3 designation specifies the ±5% version. The 1PMT5931CE3/TR13 maintains this tolerance across its qualified operating temperature range of –55°C to +150°C.

How is thermal management implemented in the 1PMT5931CE3/TR13 package?

The 1PMT5931CE3/TR13 uses Microsemi's Powermite® package with an integral metallic locking tab (TAB 1) that acts as both cathode and primary thermal path. Its specified junction-to-TAB thermal resistance is 30°C/W, enabling effective heat transfer to PCB copper pours. The full metallic bottom prevents flux entrapment and improves solder wetting, directly supporting reliable thermal conduction in reflow-soldered applications. This design makes the 1PMT5931CE3/TR13 suitable for 3.0 W continuous operation when TAB 1 is properly thermally anchored.

Is the 1PMT5931CE3/TR13 compatible with automated SMT assembly processes?

Yes, the 1PMT5931CE3/TR13 is explicitly designed for automated insertion and SMT assembly. It ships in EIA-481 compliant tape-and-reel format (7-inch reel: 3,000 pcs; 13-inch reel: 12,000 pcs) and features a DO-216 outline optimized for pick-and-place accuracy. The Powermite® package's locking tab and symmetric geometry ensure stable placement and alignment during reflow. The 1PMT5931CE3/TR13 meets all mechanical and packaging requirements cited in the MSC0995 datasheet for high-yield automated manufacturing.

What is the maximum reverse leakage current for 1PMT5931CE3/TR13, and at what voltage is it measured?

The maximum reverse leakage current for 1PMT5931CE3/TR13 is 1 µA, measured at a reverse voltage (VR) of 13.7 V, per the Electrical Characteristics table in MSC0995. This value is guaranteed across the device's operating temperature range and reflects tight process control for low-power reference and clamping applications. The 1PMT5931CE3/TR13 achieves this performance while maintaining 3.0 W power capability-distinguishing it from lower-leakage but lower-power alternatives like BZX55 series diodes.

Does the 1PMT5931CE3/TR13 have an industry-standard ESD rating?

Yes, the 1PMT5931CE3/TR13 is rated for >16 kV per the Human Body Model (HBM), as stated in the FEATURES section of the MSC0995 datasheet. This ESD rating is verified per JEDEC JS-001 and confirms robustness during handling, PCB assembly, and field operation in electrostatic-prone industrial environments. Unlike many general-purpose Zeners, the 1PMT5931CE3/TR13 includes this specification as a defined parameter-not an estimated or typical value-making it suitable for use in PLC input stages and ATE front-ends where ESD resilience is mandatory.