Microchip Technology 1N5351AE3/TR13

Overview

1N5351AE3/TR13 from Microsemi is a 14 V, ±10% tolerance, 5 W axial-leaded silicon Zener diode optimized for voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation. It delivers stable regulation at 100 mA test current with 2.5 Ω dynamic impedance, operates from –65°C to +150°C, and features RoHS-compliant matte-tin plating.

For engineers reviewing the 1N5351AE3/TR13 datasheet, 1N5351AE3/TR13 pinout, 1N5351AE3/TR13 application, or 1N5351AE3/TR13 equivalent, key selection criteria include its 14 V nominal Zener voltage, ±10% tolerance (A suffix), 5 W steady-state power rating at lead temperature <25°C, low 2.5 Ω Zener impedance at 100 mA, and compliance with MIL-STD-750 ESD testing.

Technical Context

This device functions as a two-terminal voltage reference operating in reverse breakdown. Its regulation performance is defined by Zener voltage (V_Z = 14 V), dynamic impedance (Z_Z = 2.5 Ω at I_ZT = 100 mA), and voltage regulation (ΔV_Z = 0.25 V between 10% and 50% of I_ZM).

It exhibits a maximum reverse current of 1.0 µA at 10.1 V (V_R) and supports surge currents up to 6.7 A (8.3 ms half-sine). Thermal resistance is 25 °C/W junction-to-lead at 10 mm lead length, enabling high-current operation with minimal heatsinking.

Key Specifications

Pinout & Package

Package: Axial-leaded T-18 plastic case per JEDEC DO-201AD. Cathode indicated by band; device operated with banded end positive relative to unbanded end.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 1N5351AE3/TR13, the 1N5351B offers tighter tolerance for improved closed-loop accuracy, while the MMSZ5241ET1G trades power capability for miniaturization-neither is pin-compatible, and both require layout revision.

Availability

1N5351AE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and test equipment requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for 1N5351AE3/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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial markets.

The 1N53xx series was engineered specifically for ruggedized voltage regulation in harsh-environment power systems-emphasizing thermal robustness, surge resilience, and long-term parametric stability.

FAQ

What is the Zener voltage tolerance for 1N5351AE3/TR13?

The 1N5351AE3/TR13 has a ±10% Zener voltage tolerance, as indicated by the "A" suffix in its part number. This means its measured V_Z falls between 12.6 V and 15.4 V at 100 mA test current and 25°C. The e3 suffix confirms RoHS compliance, and TR13 denotes tape-and-reel packaging per EIA-296. This tolerance is appropriate for non-critical regulation tasks where cost and availability outweigh ultra-precise voltage setting.

Can 1N5351AE3/TR13 replace a 1N4742A in a 12 V power supply?

No-1N5351AE3/TR13 is rated for 14 V nominal Zener voltage, not 12 V. Substituting it into a 12 V design would raise the regulated output by ~17%, potentially damaging downstream circuitry. The 1N4742A (12 V, ±5%) and 1N5351AE3/TR13 belong to different voltage families and have distinct thermal resistances and surge ratings. Always verify V_Z, tolerance, and power derating curves before cross-referencing Zener diodes.

What is the maximum continuous power dissipation for 1N5351AE3/TR13?

The 1N5351AE3/TR13 is rated for 5.0 W steady-state power dissipation at lead temperature (T_L) < 25°C with 10 mm lead length from body. When mounted on FR4 PCB with 1 oz copper, its derated power drops to 1.47 W at 25°C ambient. Exceeding these limits risks thermal runaway or permanent parameter shift. Derating curves in the Microsemi datasheet (Figure 1) must be followed for operation above 25°C.

Does 1N5351AE3/TR13 require dry packing before reflow soldering?

No-1N5351AE3/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 or baking. Its void-free epoxy body and annealed matte-tin plating support standard 260°C/10 s reflow profiles without popcorning or delamination. This eliminates pre-assembly bake steps and reduces manufacturing overhead.

How does the dynamic impedance of 1N5351AE3/TR13 affect regulation performance?

The 2.5 Ω dynamic impedance (Z_Z) of 1N5351AE3/TR13 directly determines how much its output voltage varies with changing load current: ΔV = Z_Z × ΔI. At 100 mA test current, a 10 mA load swing causes only 25 mV deviation-critical for maintaining tight regulation in feedback networks. Lower Z_Z values reduce sensitivity to current ripple and improve transient response, making 1N5351AE3/TR13 suitable for medium-precision analog references and SMPS feedback paths.