Microchip Technology 1N4760APE3/TR8

Overview

1N4760APE3/TR8 from Microsemi is a 1.0 W axial-lead silicon Zener diode with a nominal Zener voltage of 68 V, ±5% tolerance (A suffix), 150 Ω dynamic impedance at 3.7 mA test current, and maximum reverse leakage of 5 μA at 51.7 V. It operates from –65°C to +150°C and is used for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation.

For engineers reviewing the 1N4760APE3/TR8 datasheet, 1N4760APE3/TR8 pinout, 1N4760APE3/TR8 application, or 1N4760APE3/TR8 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (45°C/W junction-to-lead), surge current rating (2000 mA), RoHS-compliant matte-tin plating, and DO-41 package compatibility with standard axial-lead PCB layouts.

Technical Context

This device functions as a two-terminal voltage reference by operating in reverse breakdown, maintaining stable output voltage across a wide range of operating currents (3.7 mA to 65 mA) and temperatures. Its 68 V Zener voltage places it in the medium-high voltage regulation range, where temperature coefficient becomes increasingly positive (+10.5 mV/°C per Figure 3).

The DO-41 plastic package provides Level 1 moisture sensitivity (no dry pack required), 0.7 g mass, and UL94V-0 epoxy body. Thermal performance is defined for both lead-temperature (TL) and ambient-temperature (TA) conditions, with derating curves specifying 1.0 W operation only below TL = 105°C or TA = 45°C on FR4 board.

Key Specifications

Pinout & Package

Package: DO-41 (DO-204AL), axial-lead plastic encapsulated case with cathode band marking. Moisture sensitivity level 1; no dry pack required. RoHS-compliant matte-tin plating 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 1N4760APE3/TR8, the 1N4760A lacks RoHS compliance and requires Sn/Pb assembly processes, while MMSZ4708T1G offers SMT compatibility at half the power rating and higher dynamic impedance-making the 1N4760APE3/TR8 optimal for through-hole, 1 W, RoHS-compliant industrial regulation.

Availability

1N4760APE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, telecom rectifiers, and sensor reference circuits requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for 1N4760APE3/TR8 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 1N4760APE3/TR8 belongs to Microsemi's legacy 1N47xxAP Zener diode family, engineered for robust voltage regulation in harsh-environment power systems where stability, thermal resilience, and JEDEC-standard compatibility are critical.

FAQ

What is the Zener voltage tolerance of the 1N4760APE3/TR8?

The 1N4760APE3/TR8 has a nominal Zener voltage of 68 V with a ±5% tolerance, indicated by the "A" suffix in the part number per JEDEC registration. This means the actual measured V_Z falls between 64.6 V and 71.4 V at 3.7 mA test current and 25°C lead temperature. The tolerance remains valid across the full operating temperature range of –65°C to +150°C, though voltage drift due to temperature coefficient must be accounted for in precision designs.

Does the 1N4760APE3/TR8 require dry packing before use?

No, the 1N4760APE3/TR8 does not require dry packing before use. It is rated at Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ≤30°C/60% RH without baking or desiccant packaging. This simplifies inventory handling and eliminates pre-reflow bake steps in manufacturing, unlike higher-MSL components that mandate strict humidity control.

What is the maximum surge current rating for the 1N4760APE3/TR8?

The 1N4760APE3/TR8 has a maximum non-repetitive surge current (I_SM) rating of 2000 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25°C ambient. This rating applies to transient overvoltage events such as load dump or inductive switching spikes. Engineers must ensure pulse repetition rate and duty cycle remain within safe operating area limits defined in the derating curve to avoid junction overheating or parametric shift.

How does the thermal resistance of the 1N4760APE3/TR8 affect PCB layout?

The 1N4760APE3/TR8 specifies 45°C/W junction-to-lead thermal resistance at 3/8″ (10 mm) lead length from the body, meaning effective heat removal relies heavily on copper traces connected to its leads. For reliable 1.0 W operation, PCB layout must provide adequate copper area (e.g., ≥4 mm² pads) and minimize thermal isolation-especially on FR4 boards where junction-to-ambient resistance rises to 105°C/W. Shorter leads and thermal vias improve performance but do not replace lead conduction as the primary thermal path.

Is the 1N4760APE3/TR8 compatible with lead-free reflow processes?

Yes, the 1N4760APE3/TR8 is fully compatible with lead-free reflow processes. Its "e3" suffix denotes RoHS-compliant matte-tin plating, qualified for soldering at 260°C for up to 10 seconds per MIL-STD-750 Method 2026. The plastic DO-41 package meets UL94V-0 flammability requirements and withstands standard JEDEC J-STD-020 profiles without delamination or marking loss, supporting both wave and reflow assembly methods.