Microchip Technology 1PMT5936C/TR13

Overview

1PMT5936C/TR13 from Microsemi is a 30 V, ±1% tolerance surface-mount Zener diode in the Powermite® package, rated for 3.0 W DC power dissipation at TAB 1 = 60°C, with 12.5 mA test current, 28 Ω dynamic impedance, and 1 µA max reverse leakage at 22.8 V. It serves as a precision voltage reference or overvoltage clamp in power supply regulation circuits.

For engineers reviewing the 1PMT5936C/TR13 datasheet, 1PMT5936C/TR13 pinout, 1PMT5936C/TR13 application, or 1PMT5936C/TR13 equivalent, key selection criteria include its tight 1% voltage tolerance, low 28 Ω zener impedance at 12.5 mA, ESD rating >16 kV HBM, full metallic bottom for flux-free assembly, and thermal resistance of 30°C/W junction-to-TAB1.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage across load variations and temperature shifts. Its design centers on high-power density in a miniature surface-mount package, enabled by an integral heat sink locking tab and direct thermal path from junction to TAB 1 (cathode).

The device meets MIL-STD-750D test methods for reliability and is characterized at TL = 30°C with voltage measured 20 seconds after DC current application. Zener impedance is defined using 60 Hz RMS AC current equal to 10% of IZT, per Micro Note 202 for voltage-current deviation analysis.

Key Specifications

Pinout & Package

Package: Powermite® (DO-216AA), molded surface-mount package with full metallic bottom and cathode designated by TAB 1. Mounting orientation is unrestricted.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84-C30LT1G and SMBJ30A, the 1PMT5936C/TR13 uniquely delivers 3.0 W continuous Zener regulation with ±1% tolerance and integrated thermal management-enabling single-device solutions in power supply feedback and industrial clamping where accuracy, power, and thermal reliability are jointly critical.

Availability

1PMT5936C/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, automotive ECUs, and telecom line protection requiring stable component supply with guaranteed long-term continuity.

Supply support for 1PMT5936C/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 series was engineered to replace through-hole DO-41 devices in automated SMT lines while delivering equivalent or superior power handling, thermal performance, and process robustness in harsh environments.

FAQ

What is the Zener voltage tolerance for 1PMT5936C/TR13?

The "C" suffix in 1PMT5936C/TR13 denotes ±1% Zener voltage tolerance at 30 V nominal, verified per Microsemi's characterization at I_ZT = 12.5 mA and TAB 1 temperature of 30°C. This tighter tolerance eliminates need for post-assembly calibration in precision reference designs and is distinct from the ±5% standard version (1PMT5936B/TR13).

How is thermal performance specified for 1PMT5936C/TR13?

1PMT5936C/TR13 has a junction-to-TAB1 thermal resistance of 30°C/W, meaning each watt dissipated raises junction temperature 30°C above TAB 1. Full 3.0 W rating assumes TAB 1 is held at ≤60°C-requiring adequate PCB copper area or heatsinking. Derating is necessary if TAB 1 exceeds 60°C.

Can 1PMT5936C/TR13 be used in place of a TL431 in feedback circuits?

Yes, 1PMT5936C/TR13 can replace TL431 in secondary-side feedback loops where fixed 30 V reference suffices and active regulation isn't needed. Unlike TL431, it offers no adjustable output or current sink capability-but provides lower cost, smaller footprint, higher ESD immunity (>16 kV), and inherent thermal robustness without external bias components.

What does the "TR13" suffix indicate in 1PMT5936C/TR13?

The "TR13" suffix specifies tape-and-reel packaging per EIA-481 standard on a 13-inch reel containing 12,000 units. This format ensures compatibility with high-speed SMT placement equipment and supports automated manufacturing flow without manual handling or repackaging.

Is 1PMT5936C/TR13 suitable for automotive under-hood applications?

Yes, 1PMT5936C/TR13 is qualified for automotive under-hood use: its –55°C to +150°C junction temperature range, 16 kV HBM ESD rating, and robust Powermite® package with flux-free metallic bottom meet AEC-Q101 stress test requirements when properly mounted on thermally enhanced PCBs.