Microchip Technology 1PMT5949C/TR13

Overview

1PMT5949C/TR13 from Microsemi is a 100 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 250 Ω dynamic impedance at 3.7 mA test current and thermal resistance of 30°C/W junction-to-TAB1. It serves as a precision voltage reference or overvoltage clamp in industrial power supplies and automotive control modules.

For engineers reviewing the 1PMT5949C/TR13 datasheet, 1PMT5949C/TR13 pinout, 1PMT5949C/TR13 application, or 1PMT5949C/TR13 equivalent, key selection criteria include its tight 1% Zener voltage tolerance, ESD rating >16 kV HBM, full metallic bottom for flux-free soldering, and compatibility with automated insertion equipment per EIA-481 tape-and-reel packaging.

Technical Context

This Zener diode operates in reverse breakdown mode with a nominal Zener voltage of 100 V at 3.7 mA test current (IZT), exhibiting 250 Ω dynamic impedance (ZZT) and 3100 µA maximum reverse leakage (IR) at 76 V reverse voltage (VR). Its thermal design relies on direct heat conduction through TAB 1, supported by a 30°C/W junction-to-tab thermal resistance.

The device uses a molded DO-216 package with cathode designated by TAB 1, rated for junction temperatures from –55°C to +150°C, and features an integral locking tab acting as a mechanical and thermal interface for PCB mounting and heat dissipation.

Key Specifications

Pinout & Package

Package: DO-216 (Powermite®) - molded surface-mount package with full metallic bottom and integral locking tab; cathode is designated by TAB 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMF100A and BZX84-C100, the 1PMT5949C/TR13 delivers 3× higher power capability, 5× tighter voltage tolerance, and superior thermal management via its Powermite® metal-tab construction-making it the sole option for industrial-grade 100 V reference and clamping where reliability under thermal stress is mandatory.

Availability

1PMT5949C/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive engine control units, telecom line interfaces, and medical imaging bias monitors requiring stable component supply with guaranteed long-term continuity.

Supply support for 1PMT5949C/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, and industrial markets.

The Powermite® Zener diode product line was designed for high-power-density, thermally robust voltage regulation and transient suppression in harsh-environment electronics where standard SMD packages fail under thermal cycling or surge stress.

FAQ

What is the Zener voltage tolerance for 1PMT5949C/TR13?

The "C" suffix in 1PMT5949C/TR13 denotes a ±1% Zener voltage tolerance at 100 V nominal, verified at 3.7 mA test current and TAB 1 temperature of 30°C. This tighter tolerance is achieved via post-package screening and is distinct from the ±5% standard version (1PMT5949B/TR13). The 1PMT5949C/TR13 datasheet specifies voltage measurement within 20 seconds of DC current application to avoid thermal drift effects.

How is thermal management handled in the 1PMT5949C/TR13 package?

The 1PMT5949C/TR13 uses a Powermite® DO-216 package with TAB 1 as the cathode and primary thermal interface. Its 30°C/W junction-to-TAB thermal resistance requires direct soldering of TAB 1 to a minimum 100 mm² copper pad for rated 3.0 W operation at 60°C tab temperature. The full metallic bottom and integral locking tab enhance thermal conduction while preventing solder voids-critical for automotive and industrial thermal cycling reliability.

Is 1PMT5949C/TR13 compatible with automated SMT assembly?

Yes, the 1PMT5949C/TR13 is supplied in EIA-481-compliant tape-and-reel format (13-inch reel, 12,000 units) and designed for compatibility with standard pick-and-place equipment. Its Powermite® package geometry-including flat bottom surface, defined centroid, and locking tab-ensures stable feeding, accurate placement, and consistent reflow wetting without tombstoning or misalignment.

What is the maximum reverse leakage current for 1PMT5949C/TR13?

The 1PMT5949C/TR13 has a maximum reverse leakage current (IR) of 3100 µA at a reverse voltage (VR) of 76 V, measured at TL = 30°C. This value reflects worst-case leakage under specified test conditions and remains stable across its –55°C to +150°C operating range. Lower leakage can be expected at voltages below VR, supporting use in high-impedance bias networks where standby current must be minimized.

Does 1PMT5949C/TR13 meet automotive AEC-Q200 requirements?

The 1PMT5949C/TR13 is not AEC-Q200 qualified; however, its –55°C to +150°C operating temperature range, >16 kV HBM ESD rating, and Powermite® package's proven reliability in thermal cycling make it widely used in automotive engine control and body electronics where qualification is customer-defined. For AEC-Q200–mandated applications, consult Microchip's qualified Zener portfolio or perform application-specific qualification testing per customer requirements.