Microchip Technology 1PMT5934B/TR7

Overview

1PMT5934B/TR7 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 700 µA max reverse leakage at 18.2 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails and regulator feedback networks.

For engineers reviewing the 1PMT5934B/TR7 datasheet, 1PMT5934B/TR7 pinout, 1PMT5934B/TR7 application, or 1PMT5934B/TR7 equivalent, key selection criteria include its 24 V nominal Zener voltage, 3.0 W thermal capability via metallic tab, DO-216 mechanical outline, ESD rating >16 kV HBM, and compatibility with automated SMT assembly.

Technical Context

This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its Powermite® package integrates a full metallic bottom (TAB 1) for low thermal resistance (30°C/W junction-to-tab) and a locking tab that functions as both mechanical anchor and heat sink.

The device exhibits tight regulation with 19 Ω dynamic impedance at I_ZT = 15.6 mA and maintains ≤700 µA reverse leakage at V_R = 18.2 V, supporting reliable clamping in low-power analog and digital supply monitoring circuits.

Key Specifications

Pinout & Package

Package: Powermite® (DO-216), molded surface-mount package with full metallic bottom (TAB 1) acting as cathode terminal and primary thermal path. Dimensions conform to DO-216 outline; mounting position unrestricted.

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 1PMT5934B/TR7 uniquely combines 24 V precision regulation, 3.0 W continuous dissipation, and DO-216 thermal design-making it suitable for industrial power monitoring where both accuracy and ruggedness are required.

Availability

1PMT5934B/TR7 is available at Aetrix Electronics and suitable for industrial power supply monitoring, automotive body control modules, medical diagnostic equipment, and telecom remote radio units requiring stable component supply and long-term manufacturability.

Supply support for 1PMT5934B/TR7 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-including 1PMT5934B/TR7-is engineered for surface-mount power regulation and transient suppression in harsh environments where thermal stability, ESD robustness, and automated assembly compatibility are critical.

FAQ

What is the Zener voltage tolerance for 1PMT5934B/TR7?

The 1PMT5934B/TR7 has a standard Zener voltage tolerance of ±5% at 24 V nominal, measured at I_ZT = 15.6 mA with TAB 1 held at 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D respectively, but the base 1PMT5934B/TR7 part uses ±5%.

How is thermal performance managed in the 1PMT5934B/TR7 package?

The 1PMT5934B/TR7 uses a Powermite® package with a full metallic bottom (TAB 1) that serves as both cathode and thermal interface. Its specified junction-to-TAB thermal resistance is 30°C/W, enabling 3.0 W power dissipation when TAB 1 is maintained at ≤60°C-typically achieved via PCB copper pour or chassis contact.

Is the 1PMT5934B/TR7 compatible with lead-free reflow processes?

Yes, the 1PMT5934B/TR7 is qualified for standard lead-free reflow profiles per J-STD-020. Its molded Powermite® package and metallic terminations withstand peak temperatures up to 260°C, and the device is supplied in EIA-481-compliant tape-and-reel format suitable for high-speed SMT placement.

What does the "TR7" suffix indicate in 1PMT5934B/TR7?

The "TR7" suffix denotes tape-and-reel packaging per EIA-481 standard on a 7-inch reel containing 3,000 units. This packaging format ensures compatibility with automated pick-and-place equipment and supports consistent feeding in high-volume manufacturing lines.

Can the 1PMT5934B/TR7 be used as a replacement for through-hole Zener diodes like 1N5245B?

No-the 1PMT5934B/TR7 is not a drop-in replacement for 1N5245B. While both are 24 V Zeners, the 1PMT5934B/TR7 uses DO-216 surface-mount packaging with TAB 1 cathode and 3.0 W rating, whereas 1N5245B is DO-35 through-hole with 500 mW rating and axial leads. Board layout and thermal design must be revised for 1PMT5934B/TR7 integration.