Microchip Technology 1N4753PE3/TR12

Overview

1N4753PE3/TR12 from Microsemi is a 1.0 W, 36 V ±5% plastic-encapsulated Zener diode in DO-41 package, rated for 7.0 mA test current, 50 Ω dynamic impedance at I_ZT, and 1000 mA maximum regulator current at T_A = 50°C. It provides stable voltage regulation in power supply reference, overvoltage protection, and biasing circuits across industrial temperature range.

For engineers reviewing the 1N4753PE3/TR12 datasheet, 1N4753PE3/TR12 pinout, 1N4753PE3/TR12 application, or 1N4753PE3/TR12 equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (45°C/W junction-to-lead), RoHS-compliant matte-tin plating, tape-and-reel packaging (TR12), and JEDEC-registered 1N4753A-series compliance.

Technical Context

This discrete Zener diode operates in reverse breakdown to maintain a stable 36 V reference across a wide current range (1–1000 mA). Its 50 Ω dynamic impedance at 7.0 mA ensures low output variation under load transients, while the 0.25 W maximum knee current (I_ZK) defines the lower boundary of stable regulation.

Designed for axial-lead mounting on FR4 PCBs with 1 oz copper, it delivers 1.0 W steady-state dissipation at lead temperature < 105°C or ambient < 45°C. Its moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1-no dry pack required-and polarity is marked by cathode band.

Key Specifications

Pinout & Package

DO-41 (JEDEC DO-204AL) plastic axial-leaded package with cathode indicated by colored band. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable 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 1N4753A and MMSZ5245B-TP, the 1N4753PE3/TR12 offers full 1 W power capability in RoHS-compliant tape-and-reel format with industry-standard DO-41 mechanical compatibility-making it optimal for high-reliability industrial power rails requiring both regulatory compliance and thermal robustness.

Availability

1N4753PE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and precision biasing applications requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for 1N4753PE3/TR12 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 discrete components for aerospace, defense, and industrial markets.

The 1N4753PE3/TR12 belongs to Microsemi's legacy 1N47xxAP Zener diode family, engineered for ruggedized voltage regulation in harsh-environment power systems where stability, thermal resilience, and JEDEC standardization are critical.

FAQ

What is the Zener voltage tolerance of the 1N4753PE3/TR12?

The 1N4753PE3/TR12 has a nominal Zener voltage of 36 V with a tolerance of ±5%, as confirmed by its "A" suffix per JEDEC registration. This tolerance applies at 7.0 mA test current and 25°C lead temperature. The "e3" suffix denotes RoHS compliance but does not affect voltage specification. Tighter tolerances (e.g., ±2% or ±1%) require different suffixes (C or D) and are not applicable to this specific part number.

Does the 1N4753PE3/TR12 support automated assembly?

Yes-the "TR12" suffix indicates EIA-296-compliant tape-and-reel packaging optimized for pick-and-place machines. Though physically an axial-leaded DO-41 device, its carrier tape orientation and reel specifications enable reliable automated handling. This eliminates manual insertion in high-volume production while retaining the thermal and electrical advantages of through-hole mounting.

What is the maximum continuous current the 1N4753PE3/TR12 can regulate?

The 1N4753PE3/TR12 supports up to 1000 mA maximum regulator current (I_ZM) at ambient temperature of 50°C when mounted on FR4 board with specified copper area. At higher temperatures, derating applies per Figure 1 in the datasheet. Exceeding I_ZM risks thermal instability, so design margins should maintain operation below 800 mA for sustained reliability.

How does the thermal resistance of the 1N4753PE3/TR12 impact PCB layout?

The 1N4753PE3/TR12 has a junction-to-lead thermal resistance of 45°C/W. To avoid exceeding 150°C maximum junction temperature, keep lead temperature below 105°C using ≥3/8″ (10 mm) lead length from body. On PCBs, use generous copper pour around leads and avoid narrow traces-thermal performance degrades to 105°C/W junction-to-ambient if copper area falls below 4 mm² pad + 1 mm × 25 mm trace.

Is the 1N4753PE3/TR12 suitable for automotive applications?

The 1N4753PE3/TR12 operates across –65°C to +150°C and meets MIL-STD-750 ESD testing, but it is not AEC-Q200 qualified. For non-safety-critical automotive subsystems (e.g., infotainment power rails), it may be used with additional system-level validation. For safety-critical or engine-bay applications, Microsemi's JAN/JANTX-screened variants (e.g., JANTXV1N4753AP) are recommended instead of the commercial-grade 1N4753PE3/TR12.