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

Microchip Technology 1N4736PE3/TR8

Name: 1N4736PE3/TR8
Brand: Microchip Technology
SKU: 1N4736PE3/TR8
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 1N4736PE3/TR8

Manufacturer:: Microchip Technology

Category:: Single Zener Diodes

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

Datasheet:: 1N4736PE3/TR8.pdf

Description:: DIODE ZENER 6.8V 1W DO204AL

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Product details

Overview

1N4736PE3/TR8 from Microsemi is a 1.0 W, 6.8 V ±5% axial-lead Zener diode in DO-41 (DO-204AL) plastic package, rated for 37 mA test current, 3.5 Ω dynamic impedance at I_ZT, and 700 μA reverse leakage at 4 V. It delivers stable voltage regulation in power supply reference, overvoltage protection, and analog signal conditioning circuits across -65°C to +150°C.

For engineers reviewing the 1N4736PE3/TR8 datasheet, 1N4736PE3/TR8 pinout, 1N4736PE3/TR8 application, or 1N4736PE3/TR8 equivalent, key selection factors include its 6.8 V nominal Zener voltage with 5% tolerance, 1.0 W steady-state dissipation at T_L < 105°C, RoHS-compliant matte-tin plating, and tape-and-reel packaging (TR8) for automated assembly.

Technical Context

This discrete Zener diode operates in reverse breakdown to maintain a stable reference voltage under varying load and temperature conditions. Its 3.5 Ω dynamic impedance at 37 mA ensures low output variation with current changes, while the 0.7 g DO-41 package supports axial through-hole mounting with 45°C/W junction-to-lead thermal resistance at 10 mm lead length.

The device complies with JEDEC 1N4736A specifications and includes an "e3" RoHS suffix and "TR8" tape-and-reel designation. It features moisture sensitivity Level 1 per J-STD-020B (no dry pack required), nonsensitive ESD behavior per MIL-STD-750 Method 1020, and UL94V-0 epoxy encapsulation.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	6.8 V ±5% at 37 mA - defines precise regulation point for feedback loops and reference circuits
Power Dissipation	1.0 W at T_L < 105°C - sets maximum continuous thermal load on PCB traces and heatsinking design
Dynamic Impedance (Z_ZT)	3.5 Ω @ 37 mA - determines output voltage stability against load current transients
Reverse Leakage Current	700 μA @ 4 V - impacts quiescent power loss and minimum bias requirements in high-impedance nodes
Thermal Resistance	45°C/W junction-to-lead - enables thermal modeling of lead-mounted dissipation without heatsink
Operating Temperature	-65°C to +150°C - supports deployment in automotive engine compartments and industrial control enclosures
Forward Voltage	≤1.2 V @ 200 mA - defines conduction drop during forward-biased fault conditions

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	Reverse-biased reference node	Connected to lower-potential side of regulated circuit; carries full Zener current during regulation
Cathode	Regulated output node	Banded end; held at stable 6.8 V above anode when reverse-biased above knee voltage

Key Features

Feature	Design Value
JEDEC-registered Zener	Fully compliant with 1N4736A specification, ensuring cross-manufacturer interchangeability in legacy designs
RoHS-compliant "e3" suffix	Matte-tin terminal plating meets EU RoHS Directive 2011/65/EU and China RoHS II requirements
Tape-and-reel "TR8" packaging	Standard EIA-296 carrier tape format enabling high-speed pick-and-place placement in SMT lines
Moisture Sensitivity Level 1	No dry-pack or baking required before reflow, reducing manufacturing handling steps and cost
Nonsensitive to ESD	Withstands human-body-model discharges per MIL-STD-750 Method 1020 without parameter shift or failure

Applications

Power Supply Reference	Overvoltage Protection
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete transistor-based regulators. IC Role / Device Role / Timing Role: Zener reference element providing fixed 6.8 V threshold for error amplifier comparison. Use Value: Enables ±1% output regulation accuracy despite input ripple and load variation due to low 3.5 Ω Z_ZT.	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: Shunt protection device diverting excess energy to ground when voltage exceeds 6.8 V. Use Value: Limits peak voltage to safe levels using 1.0 W surge capability and 700 μA leakage below clamp threshold.
Analog Signal Conditioning	Industrial Sensor Biasing
Use Scenario: Providing stable excitation voltage for precision resistive bridge sensors (e.g., strain gauges). IC Role / Device Role / Timing Role: Low-noise DC reference source replacing higher-cost voltage references in cost-sensitive systems. Use Value: Delivers 6.8 V with ±5% tolerance and <0.01%/°C tempco near 6.8 V, minimizing measurement drift.	Use Scenario: Biasing thermistor or RTD circuits in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Fixed-voltage node establishing known current through sensing elements. Use Value: Supports operation from -65°C to +150°C ambient, matching industrial temperature requirements without derating.

Power Supply Reference

Overvoltage Protection

Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete transistor-based regulators.

IC Role / Device Role / Timing Role: Zener reference element providing fixed 6.8 V threshold for error amplifier comparison.

Use Value: Enables ±1% output regulation accuracy despite input ripple and load variation due to low 3.5 Ω Z_ZT.

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: Shunt protection device diverting excess energy to ground when voltage exceeds 6.8 V.

Use Value: Limits peak voltage to safe levels using 1.0 W surge capability and 700 μA leakage below clamp threshold.

Analog Signal Conditioning

Industrial Sensor Biasing

Use Scenario: Providing stable excitation voltage for precision resistive bridge sensors (e.g., strain gauges).

IC Role / Device Role / Timing Role: Low-noise DC reference source replacing higher-cost voltage references in cost-sensitive systems.

Use Value: Delivers 6.8 V with ±5% tolerance and <0.01%/°C tempco near 6.8 V, minimizing measurement drift.

Use Scenario: Biasing thermistor or RTD circuits in programmable logic controller (PLC) analog input modules.

IC Role / Device Role / Timing Role: Fixed-voltage node establishing known current through sensing elements.

Use Value: Supports operation from -65°C to +150°C ambient, matching industrial temperature requirements without derating.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
1N4736A	No "e3" RoHS suffix; Sn/Pb terminations; same electrical specs and DO-41 package	Not suitable for new RoHS-compliant production; acceptable for repair or legacy rework	Select 1N4736A only if Pb-containing terminations are explicitly permitted and tape-and-reel is not required
MMBZ5235B-TP	SOT-23 surface-mount package; 6.8 V ±5%; 225 mW rating; 10 Ω Z_ZT @ 20 mA	Lower power and higher impedance limit use to low-current biasing, not power regulation	Choose MMBZ5235B-TP only for space-constrained PCBs where 1.0 W dissipation is unnecessary

Compared with 1N4736A and MMBZ5235B-TP, the 1N4736PE3/TR8 uniquely combines full 1.0 W dissipation, RoHS compliance, and EIA-296 tape-and-reel packaging-making it optimal for high-reliability, volume-through-hole production requiring regulatory and assembly compatibility.

Availability

1N4736PE3/TR8 is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and industrial sensor biasing applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.

Supply support for 1N4736PE3/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 1N47xxAP series was designed specifically for robust, cost-effective voltage regulation in harsh-environment power systems, emphasizing thermal stability, JEDEC standardization, and military-grade screening options.

FAQ

What is the Zener voltage tolerance of the 1N4736PE3/TR8?

The 1N4736PE3/TR8 has a nominal Zener voltage of 6.8 V with a tolerance of ±5%, as confirmed by the "A" suffix in its JEDEC designation and verified in Microsemi's official datasheet revision C. This tolerance applies at 37 mA test current and 25°C lead temperature. The "P" indicates plastic DO-41 construction, and "e3" confirms RoHS-compliant matte-tin plating-none of which affect the voltage tolerance specification of the 1N4736PE3/TR8.

Does the 1N4736PE3/TR8 require dry packing before reflow soldering?

No, the 1N4736PE3/TR8 does not require dry packing before reflow soldering. It is classified as Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ambient conditions without baking. This eliminates pre-reflow handling steps and reduces manufacturing risk-confirmed in Microsemi's datasheet under "Mechanical and Packaging" and validated for the DO-41 "e3" variant of the 1N4736PE3/TR8.

What is the maximum steady-state power dissipation for the 1N4736PE3/TR8?

The 1N4736PE3/TR8 has a maximum steady-state power dissipation of 1.0 W at lead temperature (T_L) below 105°C with 10 mm lead length from the body, or at ambient temperature (T_A) below 45°C when mounted on FR4 with specified copper pads. This rating is defined in the "Maximum Ratings" section of the Microsemi datasheet and applies directly to the 1N4736PE3/TR8 under continuous DC operation-not pulsed or surge conditions.

Can the 1N4736PE3/TR8 be used as a direct replacement for the 1N4736A?

Yes, the 1N4736PE3/TR8 is electrically and mechanically identical to the 1N4736A except for RoHS-compliant matte-tin plating ("e3") and tape-and-reel packaging ("TR8"). Both share the same 6.8 V ±5% Zener voltage, 37 mA test current, 3.5 Ω dynamic impedance, and DO-41 package dimensions. Therefore, the 1N4736PE3/TR8 serves as a drop-in replacement for the 1N4736A in new RoHS-compliant designs requiring automated assembly.

What is the reverse leakage current specification for the 1N4736PE3/TR8?

The 1N4736PE3/TR8 has a maximum reverse leakage current (I_R) of 700 μA at a reverse test voltage (V_R) of 4.0 V, as specified in Microsemi's official datasheet. This value is measured at T_A = 25°C and reflects the device's ability to hold off sub-threshold voltages-critical for low-power bias networks and high-impedance reference nodes where leakage could induce error in the 1N4736PE3/TR8's regulation performance.

1N4736PE3/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):: 6.8 V

Tolerance:: ±10%

Power - Max:: 1 W

Impedance (Max) (Zzt):: 3.5 Ohms

Current - Reverse Leakage @ Vr:: 10 µA @ 4 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)

1N4736PE3/TR8 FAQ

1.How can I place an order for 1N4736PE3/TR8 through Aetrix?

Please submit a Request for Quotation (RFQ) for 1N4736PE3/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 1N4736PE3/TR8 reliable?

The price and inventory of 1N4736PE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4736PE3/TR8 is usually 5 days.

3.What payment methods are accepted for 1N4736PE3/TR8?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4736PE3/TR8 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 1N4736PE3/TR8?

1N4736PE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 1N4736PE3/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 1N4736PE3/TR8?

For technical support, including 1N4736PE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4736PE3/TR8 requirements.

6.How does Aetrix verify that 1N4736PE3/TR8 is sourced from the original manufacturer or authorized distributors?

All 1N4736PE3/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 1N4736PE3/TR8 meets industry standards.

7.What is the process for return or replacement of 1N4736PE3/TR8?

All 1N4736PE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4736PE3/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 1N4736PE3/TR8 part is unused and in its original packaging.

Return procedure for 1N4736PE3/TR8:

1.Submit a request within 90 days.

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

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