Microchip Technology 1N5369E3/TR13

Overview

1N5369E3/TR13 from Microsemi is a 5 W axial-leaded silicon Zener diode with nominal regulation voltage of 51 V, ±5% tolerance (B-suffix equivalent), 25 Ω dynamic impedance at 25 mA test current, and maximum reverse leakage of 0.5 μA at 40.8 V. It operates from –65 °C to +150 °C and is used for precision voltage reference and overvoltage protection in industrial power supplies.

For engineers reviewing the 1N5369E3/TR13 datasheet, 1N5369E3/TR13 pinout, 1N5369E3/TR13 application, or 1N5369E3/TR13 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (230 A), voltage regulation (ΔVZ = 0.9 V), and RoHS-compliant matte-tin plating per MIL-STD-750.

Technical Context

This device functions as a two-terminal voltage regulator operating in reverse breakdown, maintaining stable output voltage across wide current variation (IZM = 230 mA at TL = 25 °C). Its low dynamic impedance (27 Ω) and tight voltage regulation (ΔVZ = 0.9 V between 10% and 50% IZM) ensure minimal output drift under load transients.

Designed for axial-lead through-hole mounting on FR4 PCBs with 1 oz copper, it delivers 1.47 W steady-state power at TA = 25 °C using standard 4 mm² pads and 1 mm × 25 mm trace - leveraging its 85 °C/W junction-to-ambient thermal resistance when board-mounted.

Key Specifications

Pinout & Package

Package: T-18 axial-leaded plastic encapsulated case per JEDEC DO-201AD; void-free UL94V-0 epoxy body; cathode indicated by band; leads plated with RoHS-compliant matte tin per MIL-STD-750 Method 2026.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N5369E3/TR13, the 1N5369B lacks RoHS compliance and requires leaded solder processing, while SMBJ5369B trades axial-lead serviceability and superior thermal resistance (25 °C/W vs. 100 °C/W) for compact SMT integration.

Availability

1N5369E3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, telecom overvoltage protection, programmable voltage monitors, and calibration standards requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for 1N5369E3/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 RF solutions for aerospace, defense, and industrial markets.

The 1N53xxB series was designed as a ruggedized, high-power Zener platform for mission-critical voltage regulation where stability across extreme temperature and surge conditions is mandatory.

FAQ

What is the Zener voltage tolerance of the 1N5369E3/TR13?

The 1N5369E3/TR13 has a nominal Zener voltage of 51 V with ±5% tolerance, consistent with the "B" suffix designation in the 1N53xxB family. This means the actual measured V_Z falls between 48.45 V and 53.55 V at 25 °C and 25 mA test current. The e3 suffix confirms RoHS compliance but does not alter voltage tolerance specifications.

Can the 1N5369E3/TR13 be used in surface-mount designs?

No - the 1N5369E3/TR13 uses axial-leaded T-18 packaging and is intended for through-hole mounting. For surface-mount equivalents, Microsemi offers the SMBJ5369B in SMB package. Substituting 1N5369E3/TR13 into an SMT footprint would require mechanical adaptation and compromise thermal performance due to its higher junction-to-ambient resistance in board-mounted configuration.

What is the maximum steady-state power dissipation of the 1N5369E3/TR13 on a standard FR4 PCB?

When mounted on a standard FR4 PCB with 1 oz copper, 4 mm² pads, and 1 mm × 25 mm trace, the 1N5369E3/TR13 delivers 1.47 W steady-state power at ambient temperature (T_A) of 25 °C. This derates linearly above 25 °C at 11.8 mW/°C based on its specified 85 °C/W junction-to-ambient thermal resistance under those conditions.

Does the 1N5369E3/TR13 require moisture preconditioning before reflow soldering?

No - the 1N5369E3/TR13 has IPC/JEDEC J-STD-020B moisture sensitivity Level 1, meaning it may be stored indefinitely at ≤30 °C/60% RH without dry packing. It withstands standard lead-free reflow profiles up to 260 °C for 10 seconds without popcorn cracking or delamination, eliminating bake-out requirements.

How does the voltage regulation (ΔV_Z) specification impact circuit design for the 1N5369E3/TR13?

The 1N5369E3/TR13 exhibits ΔV_Z = 0.9 V - the difference between its Zener voltage measured at 10% (23 mA) and 50% (115 mA) of I_ZM. This quantifies its line regulation behavior: designers must account for up to ±0.45 V shift around 51 V when load current varies across that range, especially critical in precision references or feedback networks where such drift affects overall system accuracy.