Microchip Technology 1PMT5934AE3/TR13

Overview

1PMT5934AE3/TR13 from Microsemi is a 24 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 19 Ω dynamic impedance at 15.6 mA test current and thermal resistance of 30°C/W junction-to-TAB1 - used for precision voltage regulation and overvoltage protection in compact DC-DC converter feedback loops.

For engineers reviewing the 1PMT5934AE3/TR13 datasheet, 1PMT5934AE3/TR13 pinout, 1PMT5934AE3/TR13 application, or 1PMT5934AE3/TR13 equivalent, key selection criteria include Zener voltage tolerance, power derating above 60°C, reverse leakage at 18.2 V, knee current behavior at 0.25 mA, and compatibility with EIA-481 tape-and-reel automated placement.

Technical Context

This device operates as a two-terminal voltage reference diode with cathode designated by TAB 1, requiring no external biasing circuitry. Its full metallic bottom and integral locking tab provide direct thermal conduction to PCB copper and mechanical retention during reflow.

The 1PMT5934AE3/TR13 delivers stable 24 V regulation under DC conditions with 700 µA maximum reverse leakage at VR = 18.2 V and exhibits low dynamic impedance (19 Ω) at IZT = 15.6 mA, enabling tight regulation in low-noise analog supply rails and feedback networks.

Key Specifications

Pinout & Package

Package: Powermite® surface-mount molded package with full metallic bottom and integral locking tab; cathode identified by TAB 1; compatible with EIA-481 tape-and-reel (13-inch reel, 12,000 pcs).

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMCJ24A and BZX84-C24, the 1PMT5934AE3/TR13 uniquely combines 3.0 W continuous power handling, 19 Ω low dynamic impedance, and Powermite® thermal design - making it suitable for high-stability regulation in power-conversion feedback paths where both precision and thermal resilience are required.

Availability

1PMT5934AE3/TR13 is available at Aetrix Electronics and suitable for industrial sensor conditioning, telecom DC-DC converter feedback, automotive body control modules, and medical infusion pump power supervision requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 1PMT5934AE3/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 company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.

The Powermite® Zener diode family, including the 1PMT5934AE3/TR13, was engineered for high-power surface-mount voltage regulation in space-constrained, thermally demanding applications such as power supply feedback and overvoltage protection.

FAQ

What is the Zener voltage tolerance for 1PMT5934AE3/TR13?

The 1PMT5934AE3/TR13 has a nominal Zener voltage of 24 V with a standard tolerance of ±5%, measured at IZT = 15.6 mA and TAB 1 temperature of 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D, but the E3 suffix indicates the standard ±5% version. This tolerance directly impacts regulation accuracy in feedback circuits and must be factored into worst-case error budgets for the 1PMT5934AE3/TR13.

How is thermal management handled for 1PMT5934AE3/TR13?

The 1PMT5934AE3/TR13 uses TAB 1 as its primary thermal path, with a specified junction-to-TAB thermal resistance of 30°C/W. Effective thermal management requires soldering TAB 1 to a minimum 100 mm² copper pour on the PCB. The full metallic bottom and integral locking tab enhance heat conduction and mechanical stability during reflow. Derating begins above 60°C TAB temperature, limiting usable power to maintain safe junction temperatures - a key design constraint for the 1PMT5934AE3/TR13 in enclosed or high-ambient environments.

Can 1PMT5934AE3/TR13 be used in place of through-hole Zeners like 1N5245B?

No - the 1PMT5934AE3/TR13 is not a drop-in replacement for 1N5245B due to fundamental differences in package, thermal path, and power rating. While both are 24 V Zeners, the 1N5245B is a 0.5 W through-hole device with TO-92 packaging and no defined thermal tab, whereas the 1PMT5934AE3/TR13 is a 3.0 W surface-mount Powermite® device relying on TAB 1 for heat dissipation. Substituting the 1PMT5934AE3/TR13 requires PCB layout changes and thermal validation, and vice versa would risk thermal failure. Always verify thermal design when migrating to or from the 1PMT5934AE3/TR13.

What does the "E3" and "TR13" suffix mean in 1PMT5934AE3/TR13?

In 1PMT5934AE3/TR13, "E3" denotes the ±5% Zener voltage tolerance per Microsemi's standard coding, and "TR13" specifies packaging in a 13-inch tape-and-reel per EIA-481 standard containing 12,000 units. The "1PMT" prefix identifies the Powermite® family, "5934" corresponds to the 24 V rating, and "B" (implied in the family designation) indicates the base version. These suffixes are critical for order fulfillment and must match exact requirements when procuring the 1PMT5934AE3/TR13.

Is 1PMT5934AE3/TR13 suitable for low-current reference applications?

Yes - the 1PMT5934AE3/TR13 has a knee current (IZK) of 0.25 mA, allowing stable regulation down to very low bias currents, making it suitable for low-power reference designs such as battery-monitoring dividers or microcontroller reset circuits. However, dynamic impedance rises significantly below IZT = 15.6 mA, so regulation accuracy degrades at sub-mA currents. For optimal performance, operate the 1PMT5934AE3/TR13 near its test current or validate regulation error across the intended current range in the final design.