onsemi 1PMT5920BT3

Overview

1PMT5920BT3 from onsemi is a 6.2 V, 3.2 W surface-mount Zener diode in the POWERMITE® (DO-216AA) package, designed for precision voltage regulation and transient suppression in space-constrained portable electronics. It delivers 60.5 mA test current, <5 µA leakage at 4.0 V reverse bias, 200 Ω dynamic impedance at IZT, and operates from −55°C to +150°C.

For engineers reviewing the 1PMT5920BT3 datasheet, pinout, applications, or equivalent options, key selection criteria include its 1.1 mm max height, 8.45 mm² footprint, cathode-tab thermal path (R_Jcathode = 23°C/W), Pb-free availability, and ESD rating >16 kV (HBM).

Technical Context

This Zener regulator operates in reverse breakdown with tightly controlled V_Z = 5.89–6.51 V (nominal 6.2 V) at I_ZT = 60.5 mA, supporting stable reference generation under varying load and temperature. Its low-profile POWERMITE package integrates metallic bottom and locking tabs for enhanced thermal conduction and mechanical retention during reflow.

The device exhibits a negative temperature coefficient near 6.2 V, with typical V_Z drift of −2 mV/°C, and maintains <1.0 µA leakage at VR = 4.0 V - critical for battery-powered systems requiring ultra-low standby current and minimal self-heating.

Key Specifications

Pinout & Package

1PMT5920BT3 uses the POWERMITE® (DO-216AA) surface-mount plastic package with integral heat sink tabs and full metallic bottom for optimal thermal transfer. The case is void-free thermosetting plastic, corrosion-resistant, and rated for 260°C soldering (10 s).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5234BT1G and 1N5234B-T, the 1PMT5920BT3 uniquely combines 3.2 W power handling, 1.1 mm profile, and DO-216AA thermal design - enabling high-density, high-reliability voltage regulation where both space and thermal performance are simultaneously constrained.

Availability

1PMT5920BT3 is available at Aetrix Electronics and suitable for cellular phone power management, portable medical sensor biasing, industrial PLC I/O protection, and automotive infotainment USB port clamp applications requiring stable component supply, consistent thermal performance, and RoHS-compliant packaging.

Supply support for 1PMT5920BT3 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The 1PMT5920B Series belongs to onsemi's POWERMITE® Zener diode product line, engineered specifically for high-power-density voltage regulation and transient suppression in miniaturized portable and battery-operated systems.

FAQ

What is the Zener voltage tolerance of the 1PMT5920BT3 at its specified test current?

The 1PMT5920BT3 has a Zener voltage range of 5.89 V to 6.51 V at I_ZT = 60.5 mA, corresponding to a ±5% tolerance around the nominal 6.2 V rating. This specification is guaranteed across the full operating temperature range (−55°C to +150°C) and is measured under thermal equilibrium at 25°C ambient per the official onsemi datasheet Rev. 3.

How does the POWERMITE® package of the 1PMT5920BT3 improve thermal performance compared to standard SOD-123 or SMA packages?

The 1PMT5920BT3's POWERMITE® (DO-216AA) package achieves R_Jcathode = 23°C/W via its integral metallic cathode tab and full metallic bottom, enabling direct thermal coupling to PCB copper. This matches SMA thermal resistance while occupying 50% less footprint and offering 1.1 mm max height - a key advantage over SOD-123 (R_JA ≈ 300°C/W) and standard SMA (R_JA ≈ 248°C/W but taller and larger).

Is the 1PMT5920BT3 suitable for ESD protection in high-speed data lines such as USB 2.0?

Yes - the 1PMT5920BT3 is rated Class 3 (>16 kV HBM) and exhibits low capacitance (typically <100 pF at 0 V bias), making it suitable as a secondary-stage ESD clamp on USB 2.0 D+/D− lines. Its 6.2 V V_Z ensures clamping below the 6.8 V absolute maximum of most USB transceivers, and its 3.2 W rating handles multiple contact discharges without degradation.

What is the maximum continuous DC power dissipation of the 1PMT5920BT3 when mounted on a standard FR-4 PCB with minimum recommended pad size?

The 1PMT5920BT3 delivers 500 mW maximum DC power dissipation at T_A = 25°C on FR-4 with minimum recommended pad size. Derating is 4.0 mW/°C above 25°C, yielding ~3.2 W only when the cathode tab is actively heatsunk to a large copper area at T_tab = 75°C - a condition explicitly defined in the datasheet's "Maximum Ratings" table.

Does the 1PMT5920BT3 have a Pb-free option, and how is it designated?

Yes - the Pb-free version of the 1PMT5920BT3 is designated as 1PMT5920BT3G. It complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 moisture sensitivity level (MSL) requirements. The 'G' suffix indicates lead-free terminations and compatible packaging; electrical and thermal specifications remain identical to the standard 1PMT5920BT3.