Microchip Technology 1PMT5953AE3/TR13

Overview

1PMT5953AE3/TR13 from Microsemi is a 150 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 600 Ω dynamic impedance at 2.5 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 DC-DC converter feedback networks.

For engineers reviewing the 1PMT5953AE3/TR13 datasheet, 1PMT5953AE3/TR13 pinout, 1PMT5953AE3/TR13 application, or 1PMT5953AE3/TR13 equivalent, key selection criteria include its 150 V nominal Zener voltage, 3.0 W power handling in a compact surface-mount form, low reverse leakage (≤1 µA at 114 V), ESD rating >16 kV HBM, and compatibility with automated insertion equipment.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable voltage regulation across varying load currents. Its Powermite® package features a full metallic bottom and integral heat sink locking tab, enabling efficient thermal conduction from junction to PCB via TAB 1 - the cathode terminal - with measured thermal resistance of 30°C/W.

The device exhibits tight voltage control under specified test conditions: V_Z = 150 V ±5% measured at I_ZT = 2.5 mA with T_L = 30°C, and maintains low dynamic impedance (Z_ZT = 600 Ω) and knee impedance (Z_ZK = 0.25 Ω) to ensure predictable regulation near threshold current.

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; mounting position unrestricted; weight ≈ 0.016 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMCJ150A and 1N5375B, the 1PMT5953AE3/TR13 uniquely combines surface-mount automation readiness, 30°C/W thermal resistance via TAB 1, and ±5% DC regulation accuracy - making it optimal for space-constrained, thermally demanding Zener reference or clamping roles where both precision and power handling are required.

Availability

1PMT5953AE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and telecom line card surge protection requiring stable component supply and consistent Zener voltage performance across temperature and life cycle.

Supply support for 1PMT5953AE3/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, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.

The Powermite® Zener diode product line was engineered to deliver high-power surface-mount voltage regulation in space-constrained applications where thermal performance and assembly compatibility are critical - bridging the gap between traditional through-hole Zeners and modern SMT requirements.

FAQ

What is the Zener voltage tolerance for 1PMT5953AE3/TR13?

The 1PMT5953AE3/TR13 has a standard Zener voltage tolerance of ±5% at 150 V nominal, measured at I_ZT = 2.5 mA with TAB 1 temperature held at 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D respectively, but the E3 suffix denotes the standard ±5% version. This tolerance directly impacts regulation accuracy in feedback and reference circuits using the 1PMT5953AE3/TR13.

How is thermal management implemented for 1PMT5953AE3/TR13?

Thermal management for the 1PMT5953AE3/TR13 relies on its Powermite® package design: TAB 1 serves as both cathode and primary thermal path, with a specified junction-to-TAB thermal resistance of 30°C/W. Effective cooling requires soldering TAB 1 to a minimum 100 mm² copper area on the PCB. The full metallic bottom and integral locking tab enhance heat transfer, enabling the 1PMT5953AE3/TR13 to sustain its 3.0 W rating without external heatsinks.

Is 1PMT5953AE3/TR13 compatible with lead-free reflow processes?

Yes, the 1PMT5953AE3/TR13 is qualified for standard lead-free reflow profiles, including JEDEC J-STD-020-compliant peak temperatures up to 260°C. Its molded Powermite® package and metallization are designed to withstand multiple reflow cycles without delamination or parameter shift. The full metallic bottom also minimizes flux entrapment risk during reflow - a key reliability advantage confirmed in Microsemi's qualification testing for the 1PMT5953AE3/TR13.

What does the "TR13" suffix indicate in 1PMT5953AE3/TR13?

The "TR13" suffix in 1PMT5953AE3/TR13 specifies tape-and-reel packaging per EIA-481 standard on a 13-inch reel containing 12,000 units. This format is optimized for high-volume SMT placement equipment. The "E3" portion denotes the ±5% Zener voltage tolerance and RoHS-compliant finish. Together, TR13 confirms factory-packaged, machine-ready configuration for automated assembly of the 1PMT5953AE3/TR13.

Can 1PMT5953AE3/TR13 be used as a replacement for through-hole Zener diodes like 1N5375B?

The 1PMT5953AE3/TR13 shares identical electrical ratings (150 V, 3.0 W) with the through-hole 1N5375B but differs critically in package, thermal path, and assembly method. While functionally interchangeable in DC regulation, the 1PMT5953AE3/TR13 requires SMT layout and reflow, offers superior thermal resistance (30°C/W vs. ~50°C/W), and enables automated production. Direct substitution demands PCB redesign - the 1PMT5953AE3/TR13 is not a drop-in replacement but a performance-optimized upgrade path.