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Microchip Technology 1N4734P/TR8
- Part No.:
- 1N4734P/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4734P/TR8.pdf
- Description:
- DIODE ZENER 5.6V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,617
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Product details
Overview
1N4734P/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, used for precision voltage regulation in power supply feedback loops and reference circuits.
For engineers reviewing the 1N4734P/TR8 datasheet, 1N4734P/TR8 pinout, 1N4734P/TR8 application, or 1N4734P/TR8 equivalent, key selection factors include its 5.6 V nominal Zener voltage, 45 Ω dynamic impedance at 45 mA test current, -65 °C to +150 °C operating temperature range, RoHS-compliant "e3" variant availability, and tape-and-reel packaging (TR8) for automated assembly.
Technical Context
The 1N4734P/TR8 operates as a reverse-biased voltage reference diode with sharp breakdown knee at 5.6 V, specified under DC test conditions at 45 mA (IZT) and 25 °C lead temperature. Its Zener impedance of 5 Ω is measured with 4.5 mA AC superimposed on IZT, ensuring stable regulation across load and line variations.
It exhibits a temperature coefficient near zero at 5.6 V (per Figure 3), making it suitable for low-drift references. The device is moisture-sensitive Level 1 per J-STD-020B and requires no dry pack, with cathode polarity marked by a band and tin-lead or matte-tin plating for solderability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Vz) | 5.6 V ±5% - precise regulation point for feedback networks and analog references |
| Power Dissipation | 1.0 W at TL < 105 °C - supports continuous operation in compact power supplies |
| Test Current (IZT) | 45 mA - defines nominal operating point where Vz and ZZT are guaranteed |
| Dynamic Impedance (ZZT) | 5 Ω @ 45 mA - low AC impedance ensures minimal output voltage variation under dynamic load |
| Max Regulator Current (IZM) | 162 mA at TA = 50 °C - sets safe upper limit for sustained Zener conduction |
| Thermal Resistance (θJL) | 45 °C/W junction-to-lead - enables thermal design using standard 3/8″ lead length mounting |
| Reverse Leakage (IR) | 10 μA @ 4.2 V - confirms tight regulation onset below nominal Vz |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by a single color band; leads are tin-lead or RoHS-compliant matte-tin plated, void-free thermosetting epoxy body meeting UL94V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse-biased operation requires cathode at higher potential |
| Cathode | Regulated output node | Banded end; held at stable 5.6 V relative to anode during Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N4734A registration | Industry-standard 5.6 V Zener with documented test methodology and interchangeability |
| Plastic P-suffix construction | Lower thermal resistance vs. glass-body (G-suffix) variants, improving power handling in same footprint |
| Level 1 moisture sensitivity | No dry pack required before reflow, reducing manufacturing prep overhead |
| ESD robustness | Nonsensitive per MIL-STD-750 Method 1020 - reliable handling without special ESD controls |
| Tape-and-reel (TR8) | Standard EIA-296 packaging - compatible with high-speed pick-and-place equipment |
Applications
| Switching Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulates output voltage in flyback or forward converter feedback paths via optocoupler-coupled error amplifier. IC Role / Device Role / Timing Role: Zener reference element setting precise 5.6 V threshold for TL431 or discrete error amplifier bias. Use Value: Enables ±1% output regulation accuracy over line, load, and temperature due to low ZZT and near-zero TC at 5.6 V. | Use Scenario: Provides stable excitation voltage for bridge-based pressure or strain sensors in factory automation systems. IC Role / Device Role / Timing Role: Low-drift voltage reference source powering Wheatstone bridge and instrumentation amplifier stages. Use Value: Maintains sensor output linearity and repeatability across -40 °C to +85 °C ambient due to specified TC behavior and 162 mA IZM headroom. |
| Programmable Logic Controller I/O Protection | DC-DC Converter Trim Circuit |
Use Scenario: Clamps transient overvoltage on 24 V digital input channels subjected to inductive switching noise. IC Role / Device Role / Timing Role: Transient voltage suppression element shunting surge energy to ground during fault events. Use Value: Withstands 1000 mA surge current (ISM) and maintains clamping at ≤6.2 V, protecting downstream FPGA or microcontroller GPIO. | Use Scenario: Sets adjustable output voltage in isolated DC-DC modules using resistor divider + trim potentiometer. IC Role / Device Role / Timing Role: Precision reference node defining upper divider ratio bound for fine-tuning output setpoint. Use Value: Delivers stable 5.6 V reference despite board-level thermal gradients, enabling ±0.5% output adjust resolution over full temperature range. |
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 TR8 tape-and-reel; bulk or ammo pack only; identical electrical specs and DO-41 package | Not suitable for automated SMT placement; requires manual or vibratory feeding | Select 1N4734P/TR8 for high-volume PCB assembly; choose 1N4734A for prototyping or low-volume hand-soldered builds |
| BZX55-C5V6 | Same 5.6 V ±5%, but 500 mW rating, higher ZZT (10 Ω), and DO-35 package with 100 °C/W θJA | Limited to lower-power references; unsuitable for >100 mA continuous Zener current | Use BZX55-C5V6 only where power dissipation stays below 0.5 W and thermal margin is sufficient |
Compared with 1N4734A and BZX55-C5V6, the 1N4734P/TR8 offers superior thermal performance (45 °C/W vs. ~100 °C/W), higher power rating (1 W vs. 0.5 W), and production-ready packaging-making it optimal for industrial power supplies requiring long-term stability and automated manufacturing support.
Availability
1N4734P/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, sensor signal conditioning circuits, and programmable logic controller I/O protection requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.
Supply support for 1N4734P/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N4734P/TR8 belongs to Microsemi's legacy 1N47xxAP Zener series designed for general-purpose voltage regulation in harsh-environment power systems where JEDEC-standard reliability, thermal robustness, and long-term parametric stability are critical.
FAQ
What is the Zener voltage tolerance for 1N4734P/TR8?
The 1N4734P/TR8 has a nominal Zener voltage of 5.6 V with a tolerance of ±5%, as indicated by the "A" suffix in its JEDEC designation. This tolerance is guaranteed under standard test conditions (TL = 25 °C, 90 seconds after current application), and applies across the full operating temperature range of -65 °C to +150 °C. The 1N4734P/TR8 meets JEDEC 1N4734A specifications.
Does 1N4734P/TR8 require dry packing before reflow soldering?
No, the 1N4734P/TR8 is moisture-sensitive Level 1 per IPC/JEDEC J-STD-020B, meaning it may be stored and processed without dry pack or baking. Its plastic DO-41 package and void-free epoxy construction eliminate moisture absorption concerns, supporting standard reflow profiles up to 260 °C for 10 seconds without preconditioning.
What is the maximum continuous Zener current for 1N4734P/TR8 at 70 °C ambient?
At 70 °C ambient temperature on an FR4 board with 1 oz copper, the 1N4734P/TR8 must be derated per its power curve: 1.0 W at 45 °C ambient drops to ~0.75 W at 70 °C. Using Vz = 5.6 V, this yields a maximum continuous Zener current of approximately 134 mA. Exceeding this risks thermal runaway or parametric shift.
Is 1N4734P/TR8 RoHS compliant?
Yes, the 1N4734P/TR8 is offered in RoHS-compliant form with an "e3" suffix (e.g., 1N4734AP/e3). The base part number 1N4734P/TR8 uses annealed matte-tin plating per MIL-STD-750 Method 2026 and meets RoHS Directive 2011/65/EU requirements for lead, cadmium, mercury, hexavalent chromium, PBB, and PBDE content.
How does the thermal resistance of 1N4734P/TR8 compare to glass-body Zeners?
The 1N4734P/TR8 has a junction-to-lead thermal resistance (θJL) of 45 °C/W at 3/8″ lead length, which is significantly lower than equivalent glass-body (G-suffix) versions-typically ~60–70 °C/W. This improved thermal path allows higher sustained power dissipation and better long-term stability in thermally constrained layouts, especially when leads are soldered directly to copper pours.
1N4734P/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)
1N4734P/TR8 FAQ
1.How can I place an order for 1N4734P/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4734P/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 1N4734P/TR8 reliable?
The price and inventory of 1N4734P/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4734P/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4734P/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4734P/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4734P/TR8?
1N4734P/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4734P/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 1N4734P/TR8?
For technical support, including 1N4734P/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4734P/TR8 requirements.
6.How does Aetrix verify that 1N4734P/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4734P/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 1N4734P/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4734P/TR8?
All 1N4734P/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4734P/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 1N4734P/TR8 part is unused and in its original packaging.
Return procedure for 1N4734P/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4734P/TR8 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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Diodes Incorporated
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