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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Microchip Technology 1N4734PE3/TR8

Name: 1N4734PE3/TR8
Brand: Microchip Technology
SKU: 1N4734PE3/TR8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4734PE3/TR8

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

Package:: DO-204AL, DO-41, Axial

Datasheet:: 1N4734PE3/TR8.pdf

Description:: DIODE ZENER 5.6V 1W DO204AL

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Product details

Overview

1N4734PE3/TR8 from Microsemi is a 5.6 V, ±5% tolerance, 1 W axial-lead silicon Zener diode in DO-41 plastic package, rated for 45 °C/W junction-to-lead thermal resistance and 162 mA maximum Zener current at 50 °C ambient, used for precision voltage regulation in power supply feedback loops and reference circuits.

For engineers reviewing the 1N4734PE3/TR8 datasheet, 1N4734PE3/TR8 pinout, 1N4734PE3/TR8 application, or 1N4734PE3/TR8 equivalent, key selection criteria include Zener voltage tolerance (±5%), dynamic impedance (5 Ω @ 45 mA), reverse leakage (10 μA @ 4.2 V), thermal resistance, and RoHS-compliant matte-tin plating.

Technical Context

The 1N4734PE3/TR8 operates as a two-terminal voltage reference device, conducting in reverse breakdown to maintain stable 5.6 V across its terminals over a wide current range (1–162 mA). Its Zener knee is characterized by low dynamic impedance (5 Ω) and tight regulation, with temperature coefficient near zero (≈0 mV/°C) due to its nominal voltage falling in the optimal region of the V_Z vs. TC curve.

It features moisture sensitivity Level 1 per J-STD-020B (no dry pack required), nonsensitive ESD behavior per MIL-STD-750 Method 1020, and is rated for operation from –65 °C to +150 °C. The DO-41 package supports axial through-hole mounting with cathode band polarity marking.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	5.6 V ±5% at I_ZT = 45 mA - defines regulated output voltage with predictable tolerance in feedback networks.
Power Dissipation	1.0 W at T_L ≤ 105 °C - sets maximum steady-state power handling with 3/8″ lead length from body.
Dynamic Impedance	5 Ω @ I_ZT = 45 mA - determines regulation stiffness; lower value minimizes output voltage variation under load transients.
Reverse Leakage Current	10 μA max @ V_R = 4.2 V - ensures minimal quiescent current in standby or high-impedance bias networks.
Thermal Resistance	45 °C/W junction-to-lead - enables thermal design with known temperature rise per watt in lead-mounted configurations.
Operating Temperature	–65 °C to +150 °C - supports deployment in industrial, automotive under-hood, and military-grade environments.
Forward Voltage	1.2 V max @ 200 mA - defines conduction drop when used in forward-biased protection or clamping roles.

Pinout & Package

DO-41 (DO-204AL) plastic axial-lead package with cathode indicated by color band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Reference ground node in Zener regulator configuration	Connected to circuit common; reverse-biased operation requires cathode at higher potential.
Cathode	Regulated output node	Banded end; held at stable 5.6 V above anode when reverse current ≥ I_ZK (1 mA min).

Key Features

Feature	Design Value
JEDEC-registered 5% tolerance	Guarantees V_Z between 5.32 V and 5.88 V at 45 mA, enabling reliable closed-loop feedback setpoint accuracy.
Low dynamic impedance (5 Ω)	Minimizes output voltage deviation during load current changes up to ±10 mA around nominal I_ZT.
Moisture sensitivity Level 1	Eliminates dry-pack requirement and floor-life constraints, simplifying SMT assembly logistics and storage.
RoHS-compliant "e3" suffix	Confirms annealed matte-tin terminal plating meeting EU RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 1.
1 W power rating with derating	Supports continuous operation up to 105 °C lead temperature; usable up to 700 mW at 70 °C ambient on FR4 board.

Applications

Switch-Mode Power Supply Feedback	Overvoltage Protection Clamp
Use Scenario: Regulating output voltage in isolated flyback or forward converter feedback paths using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Precision voltage reference providing stable 5.6 V setpoint to TL431 or similar shunt regulator IC. Use Value: Enables ±1% output regulation accuracy with minimal drift over temperature and line/load variations.	Use Scenario: Clamping transient surges on 5 V logic rails or sensor inputs exposed to ESD or inductive kickback. IC Role / Device Role / Timing Role: Two-terminal shunt protector diverting excess energy to ground when voltage exceeds 5.6 V. Use Value: Limits peak voltage to safe levels without adding series resistance or propagation delay inherent in active TVS devices.
Industrial Sensor Excitation	Reference Voltage Generator
Use Scenario: Providing stable excitation voltage to resistive bridge sensors (e.g., strain gauges, RTDs) in PLC analog input modules. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source replacing higher-cost bandgap references where ±5% tolerance suffices. Use Value: Delivers consistent 5.6 V bias with <10 μA leakage, minimizing measurement offset and self-heating errors.	Use Scenario: Generating fixed reference for ADCs, comparators, or DACs in embedded control systems with limited PCB area. IC Role / Device Role / Timing Role: Passive voltage reference establishing threshold or calibration point independent of supply rail fluctuations. Use Value: Achieves 5.6 V reference stability with <5 Ω dynamic impedance, reducing sensitivity to current-source variations in bias networks.

Switch-Mode Power Supply Feedback

Overvoltage Protection Clamp

Use Scenario: Regulating output voltage in isolated flyback or forward converter feedback paths using optocoupler-coupled error amplifiers.

IC Role / Device Role / Timing Role: Precision voltage reference providing stable 5.6 V setpoint to TL431 or similar shunt regulator IC.

Use Value: Enables ±1% output regulation accuracy with minimal drift over temperature and line/load variations.

Use Scenario: Clamping transient surges on 5 V logic rails or sensor inputs exposed to ESD or inductive kickback.

IC Role / Device Role / Timing Role: Two-terminal shunt protector diverting excess energy to ground when voltage exceeds 5.6 V.

Use Value: Limits peak voltage to safe levels without adding series resistance or propagation delay inherent in active TVS devices.

Industrial Sensor Excitation

Reference Voltage Generator

Use Scenario: Providing stable excitation voltage to resistive bridge sensors (e.g., strain gauges, RTDs) in PLC analog input modules.

IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source replacing higher-cost bandgap references where ±5% tolerance suffices.

Use Value: Delivers consistent 5.6 V bias with <10 μA leakage, minimizing measurement offset and self-heating errors.

Use Scenario: Generating fixed reference for ADCs, comparators, or DACs in embedded control systems with limited PCB area.

IC Role / Device Role / Timing Role: Passive voltage reference establishing threshold or calibration point independent of supply rail fluctuations.

Use Value: Achieves 5.6 V reference stability with <5 Ω dynamic impedance, reducing sensitivity to current-source variations in bias networks.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4734A	No "e3" RoHS suffix; Sn/Pb plating; same V_Z, I_ZT, Z_ZT, and package.	Not compliant with RoHS Directive; unsuitable for new EU-market designs requiring lead-free termination.	Select 1N4734A only for legacy repair or non-RoHS programs where Sn/Pb solder compatibility is required.
BZX55C5V6	Same 5.6 V ±5%, but DO-35 glass package; higher thermal resistance (500 °C/W junction-to-ambient); 500 mW rating.	Lower power handling and inferior thermal performance limit use in sustained 1 W applications.	Choose BZX55C5V6 only for space-constrained layouts accepting reduced power margin and higher thermal rise.

Compared with 1N4734A and BZX55C5V6, the 1N4734PE3/TR8 delivers full 1 W capability in a RoHS-compliant DO-41 package with industry-leading 45 °C/W thermal resistance-making it optimal for thermally demanding, volume-production power regulation where compliance and reliability are mandatory.

Availability

1N4734PE3/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, industrial sensor excitation, and reference voltage generation requiring stable component supply and RoHS compliance.

Supply support for 1N4734PE3/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, RF, and timing components for aerospace, defense, and industrial markets.

The 1N47xxAP series was designed specifically for robust, cost-effective voltage regulation in power conversion and protection circuits where JEDEC-standardized performance, thermal resilience, and long-term stability are critical.

FAQ

What is the Zener voltage tolerance of the 1N4734PE3/TR8?

The 1N4734PE3/TR8 has a nominal Zener voltage of 5.6 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 5.32 V and 5.88 V when tested at 45 mA and 25 °C lead temperature. This tolerance is confirmed by the "A" suffix in the base part number and applies across the full operating temperature range.

Does the 1N4734PE3/TR8 require dry packing before reflow soldering?

No, the 1N4734PE3/TR8 does not require dry packing. It is moisture sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at standard ambient conditions without baking or humidity-controlled packaging prior to assembly.

What is the maximum Zener current (I_ZM) for the 1N4734PE3/TR8 at 50 °C ambient?

The maximum Zener current for the 1N4734PE3/TR8 is 162 mA at 50 °C ambient temperature, as specified in the Electrical Characteristics table. This value assumes proper thermal management and accounts for power derating above 25 °C ambient.

Can the 1N4734PE3/TR8 be used in surface-mount designs?

No, the 1N4734PE3/TR8 uses a DO-41 axial-lead package and is intended for through-hole mounting. For surface-mount equivalents, Microsemi offers the SMAJ4734A and MLL4734A in DO-214AC and SOD-123 packages respectively-both sharing identical electrical specs but differing in mechanical form factor.

What does the "TR8" suffix indicate in 1N4734PE3/TR8?

"TR8" indicates tape-and-reel packaging per EIA-296 standard, with 8 mm carrier tape width and 1,000 units per reel. This format supports automated pick-and-place assembly and is RoHS-compliant alongside the "e3" termination suffix.

1N4734PE3/TR8 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: DO-204AL, DO-41, Axial

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 5.6 V

Tolerance:: ±10%

Power - Max:: 1 W

Impedance (Max) (Zzt):: 5 Ohms

Current - Reverse Leakage @ Vr:: 10 µA @ 2 V

Voltage - Forward (Vf) (Max) @ If:: 1.2 V @ 200 mA

Operating Temperature:: -65°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AL (DO-41)

1N4734PE3/TR8 FAQ

1.How can I place an order for 1N4734PE3/TR8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4734PE3/TR8 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 1N4734PE3/TR8 reliable?

The price and inventory of 1N4734PE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4734PE3/TR8 is usually 5 days.

3.What payment methods are accepted for 1N4734PE3/TR8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4734PE3/TR8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4734PE3/TR8?

1N4734PE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4734PE3/TR8 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 1N4734PE3/TR8?

For technical support, including 1N4734PE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4734PE3/TR8 requirements.

6.How does Aetrix verify that 1N4734PE3/TR8 is sourced from the original manufacturer or authorized distributors?

All 1N4734PE3/TR8 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N4734PE3/TR8 meets industry standards.

7.What is the process for return or replacement of 1N4734PE3/TR8?

All 1N4734PE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4734PE3/TR8, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 1N4734PE3/TR8 part is unused and in its original packaging.

Return procedure for 1N4734PE3/TR8:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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