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Microchip Technology 1N4734P/TR12
- Part No.:
- 1N4734P/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4734P/TR12.pdf
- Description:
- DIODE ZENER 5.6V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,891
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Product details
Overview
1N4734P/TR12 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 reference and overvoltage protection circuits.
For engineers reviewing the 1N4734P/TR12 datasheet, 1N4734P/TR12 pinout, 1N4734P/TR12 application, or 1N4734P/TR12 equivalent, key selection criteria include Zener voltage tolerance, dynamic impedance (5 Ω @ 45 mA), reverse leakage (10 μA @ 4.2 V), thermal derating behavior, and RoHS-compliant tape-and-reel packaging (TR12).
Technical Context
The 1N4734P/TR12 operates as a two-terminal voltage reference device, conducting in reverse breakdown to maintain stable 5.6 V across its terminals within ±5% tolerance over temperature and current variations. Its 5 Ω dynamic impedance at 45 mA test current ensures low output voltage variation under load changes.
Designed for operation with cathode-banded end positive relative to anode, it supports continuous DC regulation up to 162 mA at 50 °C lead temperature and withstands 1 A surge current per half-sine pulse. It meets MIL-STD-750 ESD immunity and IPC/JEDEC J-STD-020B Level 1 moisture sensitivity without dry pack.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.6 V ±5% at 45 mA - defines nominal regulation point with tight production control |
| Power Dissipation | 1.0 W at 25 °C - sets maximum steady-state thermal limit before derating |
| Dynamic Impedance (ZZT) | 5 Ω @ 45 mA - determines output voltage stability under varying load current |
| Reverse Leakage Current | 10 μA @ 4.2 V - specifies minimum off-state current before breakdown onset |
| Thermal Resistance (Junction-to-Lead) | 45 °C/W at 10 mm lead length - enables thermal design using lead conduction path |
| Maximum Regulator Current (IZM) | 162 mA at TL = 50 °C - defines safe continuous operating current under thermal constraint |
| Forward Voltage | 1.2 V max @ 200 mA - relevant for forward-bias protection or polarity-checking use cases |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead package with cathode indicated by colored 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 | Connected to circuit common; reverse-biased operation requires this terminal negative relative to cathode |
| Cathode | Regulated output node | Banded end; held at stable 5.6 V above anode during Zener conduction; carries full regulator current |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N4734A series | Ensures cross-manufacturer compatibility and standardized electrical behavior per industry baseline |
| Plastic P-suffix construction | Delivers lower thermal resistance (45 °C/W) vs. glass-body G-suffix variants for improved power handling |
| RoHS-compliant "e3" option | Meets environmental compliance requirements without performance trade-offs in regulation or reliability |
| Tape-and-reel TR12 packaging | Enables automated SMT-compatible placement despite axial-lead form factor via carrier tape orientation |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback node in linear regulator or switching converter error amplifier. IC Role / Device Role / Timing Role: Provides precise 5.6 V reference voltage for comparator or op-amp input. Use Value: Maintains output regulation accuracy within ±5% over -65 °C to +150 °C and 10–162 mA operating range. | Use Scenario: Protecting downstream ICs from transient voltage spikes on 5 V rail. IC Role / Device Role / Timing Role: Shunts excess energy to ground when rail exceeds 5.6 V + dynamic margin. Use Value: Limits clamping voltage to ≤6.2 V at 100 mA surge, with 1 A peak surge capability per half-sine pulse. |
| Signal Level Shifting | Current Source Biasing |
Use Scenario: Generating fixed bias offset for analog sensor interface or op-amp input stage. IC Role / Device Role / Timing Role: Establishes stable DC bias point independent of supply variation. Use Value: Delivers <10 μA leakage below 4.2 V and <5 Ω dynamic impedance above 45 mA, minimizing signal distortion. | Use Scenario: Setting constant current for LED driver or transistor bias network. IC Role / Device Role / Timing Role: Acts as voltage-controlled current source when series-resistor biased. Use Value: Enables predictable 162 mA max current at 50 °C lead temperature with 1 W dissipation limit. |
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 TR suffix; bulk packaging; identical electrical specs and DO-41 package | Not optimized for automated assembly; requires manual or vibratory feed handling | Select 1N4734P/TR12 for SMT-line integration; choose 1N4734A for prototyping or low-volume hand-soldered builds |
| BZX55C5V6 | Same 5.6 V/5% spec but in DO-35 glass package; higher 500 °C/W junction-to-air thermal resistance | Lower power handling in still-air environments; unsuitable for >125 mW continuous operation without heatsinking | Prefer 1N4734P/TR12 where thermal performance or RoHS compliance is critical; BZX55C5V6 acceptable only in legacy designs with existing DO-35 footprint |
Compared with 1N4734A and BZX55C5V6, the 1N4734P/TR12 offers tape-and-reel automation readiness, superior thermal conduction via plastic DO-41 package, and guaranteed RoHS compliance-making it optimal for high-reliability industrial power supplies requiring consistent long-term regulation stability.
Availability
1N4734P/TR12 is available at Aetrix Electronics and suitable for power supply reference, overvoltage clamp, and signal level shifting applications requiring stable component supply, consistent Zener voltage tolerance, and RoHS-compliant packaging.
Supply support for 1N4734P/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N4734P/TR12 belongs to Microsemi's legacy 1N47xxAP Zener diode family, engineered for robust voltage regulation in harsh-environment power systems where thermal stability, ESD immunity, and long-term parametric consistency are critical.
FAQ
What is the Zener voltage tolerance of the 1N4734P/TR12?
The 1N4734P/TR12 has a nominal Zener voltage of 5.6 V with a ±5% tolerance, as confirmed by its "A" suffix per JEDEC registration. This means the actual measured VZ falls between 5.32 V and 5.88 V at 45 mA test current and 25 °C lead temperature. The tolerance remains valid across the full operating temperature range of –65 °C to +150 °C, supporting reliable regulation in wide-temperature applications.
Does the 1N4734P/TR12 meet RoHS requirements?
Yes, the 1N4734P/TR12 is RoHS compliant, indicated by the "e3" designation in Microsemi's official documentation. Its terminations use annealed matte-tin plating instead of tin-lead, and the void-free thermosetting epoxy body meets UL94V-0 flammability standards. Compliance is verified per EU Directive 2011/65/EU and applies to both the device and its TR12 tape-and-reel packaging.
What is the maximum continuous Zener current for the 1N4734P/TR12?
The maximum continuous Zener current for the 1N4734P/TR12 is 162 mA at a lead temperature (TL) of 50 °C, derived from its 1.0 W power rating and thermal resistance of 45 °C/W. At higher lead temperatures, current must be reduced per the derating curve in Figure 1 of the datasheet; at 105 °C lead temperature, the allowable current drops to zero. This rating assumes 10 mm lead length from the package body.
How is polarity marked on the 1N4734P/TR12?
The 1N4734P/TR12 uses a cathode band to indicate polarity: the banded end is the cathode and must be held positive relative to the unmarked (anode) end for proper Zener regulation. This marking is laser-etched or molded into the DO-41 plastic body and aligns with JEDEC standard orientation. Forward voltage is specified at ≤1.2 V @ 200 mA, confirming conventional diode behavior in forward bias.
What does the "TR12" suffix mean in 1N4734P/TR12?
"TR12" indicates EIA-296 standard tape-and-reel packaging with 12 mm tape width, designed for automated pick-and-place equipment. Each reel contains 1,000 units, oriented with cathode band facing a defined direction per EIA specification. This differs from the base 1N4734P (bulk or ammo-pack), and ensures compatibility with high-speed SMT lines while preserving all electrical and thermal characteristics of the underlying 1N4734P device.
1N4734P/TR12 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/TR12 FAQ
1.How can I place an order for 1N4734P/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4734P/TR12 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/TR12 reliable?
The price and inventory of 1N4734P/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4734P/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4734P/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4734P/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4734P/TR12?
1N4734P/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4734P/TR12 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/TR12?
For technical support, including 1N4734P/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4734P/TR12 requirements.
6.How does Aetrix verify that 1N4734P/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4734P/TR12 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/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4734P/TR12?
All 1N4734P/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4734P/TR12, 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/TR12 part is unused and in its original packaging.
Return procedure for 1N4734P/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4734P/TR12 Tags
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