Microchip Technology 1PMT5956C/TR7

Overview

1PMT5956C/TR7 from Microsemi is a 200 V, ±1% tolerance Zener diode in the Powermite® surface-mount package, rated for 3.0 W DC power dissipation at TAB 1 = 60°C, with 1.9 mA test current (IZT), 1200 Ω dynamic impedance (ZZT), and thermal resistance of 30°C/W junction-to-TAB1 - used for precision voltage regulation in high-reliability industrial power supplies.

For engineers reviewing the 1PMT5956C/TR7 datasheet, 1PMT5956C/TR7 pinout, 1PMT5956C/TR7 application, or 1PMT5956C/TR7 equivalent, key selection criteria include tight voltage tolerance (±1%), ESD rating >16 kV HBM, low reverse leakage (<1 µA at VR = 152 V), and compatibility with automated insertion equipment and EIA-481 tape-and-reel packaging.

Technical Context

This Zener diode operates as a two-terminal voltage reference device with cathode designated by TAB 1, requiring no external biasing circuitry. Its full metallic bottom eliminates solder flux entrapment during reflow, and integral locking tabs provide mechanical retention and thermal conduction to the PCB pad.

The device is characterized at TL = 30°C with VZ measured 20 seconds after applying DC current; dynamic impedance is derived using 60 Hz RMS AC current equal to 10% of IZT. Thermal resistance (30°C/W) and junction temperature range (–55°C to +150°C) support operation in thermally constrained environments.

Key Specifications

Pinout & Package

Package: Powermite® surface-mount molded package with full metallic bottom and integral heat-sink locking tabs; DO-216 outline; cathode identified by TAB 1; weight ≈ 0.016 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMF200A and BZX84-C200, the 1PMT5956C/TR7 delivers 3× higher power capability, 1% tolerance, and superior thermal management via TAB 1 - making it uniquely suited for industrial-grade continuous regulation and high-energy clamping where stability and longevity are critical.

Availability

1PMT5956C/TR7 is available at Aetrix Electronics and suitable for industrial power supply regulation, telecom overvoltage protection, and medical HV bias networks requiring stable component supply, long-lifecycle availability, and traceable sourcing.

Supply support for 1PMT5956C/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 diode product line was designed specifically for surface-mount applications demanding high power density, robust thermal performance, and assembly compatibility with automated manufacturing - addressing limitations of legacy through-hole Zeners in modern compact power systems.

FAQ

What is the Zener voltage tolerance for 1PMT5956C/TR7?

The "C" suffix in 1PMT5956C/TR7 denotes ±1% Zener voltage tolerance at 200 V, verified per Microsemi's characterization at IZT = 1.9 mA and TL = 30°C. This tighter tolerance supports precision regulation in feedback networks where standard ±5% devices would introduce unacceptable error margins in closed-loop systems.

How is thermal performance managed in the 1PMT5956C/TR7 package?

The 1PMT5956C/TR7 uses a Powermite® package with TAB 1 as the cathode and primary thermal path, achieving 30°C/W junction-to-TAB thermal resistance. Effective thermal management requires soldering TAB 1 to a minimum 100 mm² copper pour; this design eliminates flux entrapment and leverages the full metallic bottom for reliable heat conduction in high-power-density layouts.

Is 1PMT5956C/TR7 compatible with automated SMT assembly processes?

Yes, the 1PMT5956C/TR7 is fully compatible with automated insertion equipment and standard reflow profiles. Its Powermite® package features integral locking tabs that prevent tombstoning, and its DO-216 outline conforms to EIA-481 tape-and-reel standards (7″ reel: 3,000 pcs; 13″ reel: 12,000 pcs), enabling seamless pick-and-place integration.

What is the maximum reverse leakage current for 1PMT5956C/TR7?

The 1PMT5956C/TR7 specifies maximum reverse leakage current of <1 µA at VR = 152 V (80% of VZ), measured at TL = 30°C. This low leakage ensures minimal power loss in high-impedance bias networks and preserves accuracy in precision reference applications such as medical HV supplies and calibration instruments.

Does 1PMT5956C/TR7 meet industry ESD requirements?

Yes, the 1PMT5956C/TR7 has an ESD rating exceeding 16 kV per Human Body Model (HBM), verified per ANSI/ESDA/JEDEC JS-001. This level of robustness allows direct handling and board-level integration without additional ESD protection in most industrial and telecom environments, reducing BOM count and layout complexity.