Microchip Technology 1PMT5954E3/TR13

Overview

1PMT5954E3/TR13 from Microsemi is a 160 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 700 Ω dynamic impedance at 2.3 mA test current and 121.6 mA maximum Zener current - used for precision voltage regulation and overvoltage protection in high-reliability DC power rails.

For engineers reviewing the 1PMT5954E3/TR13 datasheet, 1PMT5954E3/TR13 pinout, 1PMT5954E3/TR13 application, or 1PMT5954E3/TR13 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (30°C/W junction-to-TAB), ESD rating (>16 kV HBM), reverse leakage (<1 µA at 121.6 V), and compatibility with EIA-481 tape-and-reel automated assembly.

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 and integral heat sink locking tab enable direct thermal conduction to PCB copper, supporting stable regulation under sustained 3.0 W dissipation when mounted on ≥1 sq-in 2-oz copper.

The device exhibits low reverse leakage (<1 µA at VR = 121.6 V) and tight knee characteristics (IZK = 0.25 mA, ZZK = 6500 Ω), enabling reliable clamping in low-current standby modes while maintaining sharp breakdown at nominal Zener voltage (160 V ±5%).

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; mechanical outline conforms to DO-216; weight ≈ 0.016 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N5375B and BZX84-C160, the 1PMT5954E3/TR13 uniquely delivers 3.0 W surface-mount power handling in a miniature Powermite® package with 30°C/W thermal resistance and >16 kV ESD rating - making it optimal for space-constrained, high-reliability industrial and automotive voltage regulation where thermal performance and surge immunity are critical.

Availability

1PMT5954E3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive electronic control units, medical diagnostic equipment, and telecom line cards requiring stable component supply with guaranteed long-term availability and traceable sourcing.

Supply support for 1PMT5954E3/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 and mixed-signal components for aerospace, defense, industrial, and communications markets.

The Powermite® Zener diode product line was designed specifically to deliver high-power surface-mount voltage regulation in ultra-compact packages for mission-critical power systems where thermal performance, ESD robustness, and long-term stability are mandatory.

FAQ

What is the Zener voltage tolerance for 1PMT5954E3/TR13?

The 1PMT5954E3/TR13 has a standard Zener voltage tolerance of ±5% at 160 V, measured at 2.3 mA test current with TAB 1 held at 30°C. Tighter tolerances of ±2% (suffix C) and ±1% (suffix D) are available upon request. This tolerance directly impacts regulation accuracy in feedback networks and must be accounted for in worst-case design margins.

How is thermal management handled for 1PMT5954E3/TR13 in high-power operation?

The 1PMT5954E3/TR13 achieves 3.0 W power dissipation via its Powermite® package's full metallic bottom and integral heat sink locking tab, which conduct heat directly to PCB copper. Its specified thermal resistance is 30°C/W junction-to-TAB, so maintaining TAB 1 at ≤60°C requires adequate copper area and airflow - typically ≥1 sq-in of 2-oz copper for continuous operation.

What does the 'E3' suffix indicate in 1PMT5954E3/TR13?

The 'E3' suffix in 1PMT5954E3/TR13 denotes ±5% Zener voltage tolerance and tape-and-reel packaging per EIA-481 standard. The 'TR13' indicates 13-inch reel packaging containing 12,000 units. This packaging format ensures compatibility with high-speed pick-and-place equipment and supports automated SMT assembly lines.

Can 1PMT5954E3/TR13 be used as a direct replacement for older through-hole Zeners like 1N5375B?

No - while 1PMT5954E3/TR13 and 1N5375B share the same 160 V nominal Zener voltage, they differ in package (Powermite® vs. DO-15), thermal resistance (30°C/W vs. ~50°C/W), and mounting method (SMT vs. through-hole). Direct replacement would require PCB layout revision and thermal redesign to accommodate the surface-mount footprint and lower thermal resistance of the 1PMT5954E3/TR13.

What is the maximum reverse leakage current for 1PMT5954E3/TR13 at rated voltage?

The maximum reverse leakage current for 1PMT5954E3/TR13 is 1 µA at VR = 121.6 V (80% of nominal 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 where current draw must remain negligible.