Microchip Technology 1N5362E3/TR13

Overview

1N5362E3/TR13 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 28 V, ±5% tolerance (B-suffix equivalent), 6.0 Ω maximum dynamic impedance at 50 mA test current, and 130 A peak surge current rating. It operates across –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in industrial power supplies and DC-DC converter feedback loops.

For engineers reviewing the 1N5362E3/TR13 datasheet, 1N5362E3/TR13 pinout, 1N5362E3/TR13 application, or 1N5362E3/TR13 equivalent, key selection criteria include Zener voltage stability under varying load current, thermal resistance (25 °C/W junction-to-lead), surge robustness (8.3 ms half-sine), and RoHS-compliant matte-tin plating for reliable solderability.

Technical Context

This device functions as a two-terminal voltage regulator operating in reverse breakdown, where its Zener voltage (V_Z = 28 V) is maintained across a wide range of reverse currents (I_ZT = 50 mA, I_ZM = 130 mA). Its low dynamic impedance (Z_Z ≤ 6.0 Ω) ensures minimal voltage deviation with current changes.

Thermal design relies on junction-to-lead conduction (25 °C/W at 10 mm lead length); when mounted on FR4 with 4 mm² copper pads, thermal resistance rises to 85 °C/W. The cathode band identifies polarity, and operation requires the banded end to be held positive relative to the anode.

Key Specifications

Pinout & Package

Package: Axial-leaded T-18 plastic case (Void-free UL94V-0 epoxy), 0.7 g weight, cathode indicated by black band. Leads are annealed matte-tin plated per MIL-STD-750 Method 2026.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N5362B and SMBJ28A, the 1N5362E3/TR13 uniquely combines RoHS compliance, axial-leaded ease of prototyping and repair, and true Zener regulation performance-making it optimal for industrial power reference and clamping where both precision and ruggedness are required.

Availability

1N5362E3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, DC-DC converter feedback networks, and overvoltage protection circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for 1N5362E3/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, RF, and radiation-hardened components for aerospace, defense, and industrial markets.

The 1N53xx series was designed for robust, high-power voltage regulation in harsh-environment power systems-emphasizing thermal resilience, surge immunity, and long-term parametric stability.

FAQ

What is the Zener voltage tolerance of the 1N5362E3/TR13?

The 1N5362E3/TR13 has a nominal Zener voltage of 28 V with ±5% tolerance, consistent with the "B" suffix designation in the 1N53xxB family. This tolerance is verified at 50 mA test current and 25 °C lead temperature, and applies across the full operating temperature range of –65 °C to +150 °C.

Does the 1N5362E3/TR13 require dry packing before PCB assembly?

No-the 1N5362E3/TR13 has IPC/JEDEC J-STD-020B moisture sensitivity Level 1, meaning it is not hygroscopic and does not require dry pack or baking prior to reflow soldering. This simplifies handling and reduces manufacturing overhead in both prototype and production environments.

What is the maximum continuous Zener current for the 1N5362E3/TR13?

The maximum continuous Zener current (I_ZM) for the 1N5362E3/TR13 is 130 mA when operated at 25 °C lead temperature with adequate heat sinking. At higher ambient temperatures or on standard FR4 PCBs, derating applies-e.g., ~1.47 W at 25 °C ambient yields ~52 mA max continuous current.

Can the 1N5362E3/TR13 be used as a substitute for the 1N5362B?

Yes-the 1N5362E3/TR13 is functionally identical to the 1N5362B in electrical specifications (28 V ±5%, 5 W, same Z_Z and I_ZSM), differing only in RoHS compliance (e3 suffix) and tape-and-reel packaging (TR13). No circuit or layout changes are needed for drop-in replacement in existing designs.

What is the thermal resistance specification for the 1N5362E3/TR13?

The 1N5362E3/TR13 has a junction-to-lead thermal resistance (R_θJL) of 25 °C/W when measured at 10 mm (3/8 inch) lead length from the body. When mounted on FR4 with 4 mm² copper pads and 1 mm track width, R_θJA increases to 85 °C/W-critical for calculating safe operating area in thermally constrained layouts.