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Microchip Technology 1N4733PE3/TR8
- Part No.:
- 1N4733PE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4733PE3/TR8.pdf
- Description:
- DIODE ZENER 5.1V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,995
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Product details
Overview
1N4733PE3/TR8 from Microsemi is a 5.1 V, ±5% tolerance, 1 W axial-lead Zener diode in DO-41 plastic package, rated for 49 mA test current, 7 Ω dynamic impedance at IZT, and 10 µA reverse leakage at 3.8 V, used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4733PE3/TR8 datasheet, 1N4733PE3/TR8 pinout, 1N4733PE3/TR8 application, or 1N4733PE3/TR8 equivalent, key selection factors include its 5.1 V nominal Zener voltage, 1 W steady-state dissipation at TL < 105°C, RoHS-compliant matte-tin plating, tape-and-reel packaging (TR8), and JEDEC-registered 1N4733A-series compliance with MIL-PRF-19500 screening options.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable output voltage across varying load and line conditions. Its 7 Ω dynamic impedance at 49 mA ensures low regulation error under moderate current variation, while the 10 µA reverse leakage at 3.8 V supports low-power standby operation.
The device features a thermal resistance of 45 °C/W junction-to-lead (3/8" lead length) and 105 °C/W junction-to-ambient on FR4 board, enabling reliable operation from –65 °C to +150 °C. Its cathode band marking and tin-lead or RoHS-compliant terminations ensure unambiguous polarity and solderability per MIL-STD-750 Method 2026.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V ±5% at 49 mA - defines precise regulation point for feedback loops and reference rails |
| Power Dissipation | 1.0 W at TL < 105°C - sets maximum continuous thermal load without derating on leaded PCB mount |
| Dynamic Impedance (ZZT) | 7 Ω at IZT = 49 mA - determines output voltage deviation under load transients |
| Reverse Leakage Current | 10 µA max at VR = 3.8 V - ensures minimal quiescent current in low-power shutdown modes |
| Forward Voltage | 1.2 V max at IF = 200 mA - confirms standard silicon diode conduction behavior for bidirectional protection use |
| Operating Temperature | –65 °C to +150 °C - supports deployment in automotive engine compartments and industrial control enclosures |
| Package | DO-41 (DO-204AL) plastic - provides moisture-insensitive Level 1 IPC/JEDEC J-STD-020B handling without dry pack |
Pinout & Package
DO-41 plastic package: axial-leaded, void-free thermosetting epoxy body (UL94V-0), cathode indicated by colored band; terminals are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node in Zener regulation configuration; forward-conducts below 1.2 V |
| Cathode | Banded end | Connected to higher-potential node; reverse-breakdown occurs here to clamp voltage at 5.1 V |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N4733A series | Ensures cross-manufacturer compatibility and standardized test conditions per industry specification |
| RoHS-compliant "e3" suffix | Confirms annealed matte-tin termination meeting EU Directive 2011/65/EU and China RoHS II |
| Tape-and-reel "TR8" packaging | Enables automated SMT placement despite axial form factor via carrier tape compatible with EIA-296 standard |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints during assembly handling |
| Nonsensitive to ESD | Withstands >4 kV HBM per MIL-STD-750 Method 1020 without parameter shift or failure |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulates error amplifier input in isolated flyback converters using optocoupler feedback. IC Role / Device Role / Timing Role: Zener reference providing stable 5.1 V threshold for TL431-type shunt regulator biasing. Use Value: Maintains ±1% output voltage accuracy over temperature due to tight 5% VZ tolerance and low 7 Ω ZZT. | Use Scenario: Supplies excitation voltage to bridge-based pressure transducers in PLC analog input modules. IC Role / Device Role / Timing Role: Precision voltage reference stabilizing Wheatstone bridge bias under varying ambient temperatures. Use Value: Delivers stable 5.1 V with <10 µA leakage, minimizing offset drift in 24-bit sigma-delta ADC front-ends. |
| Overvoltage Clamp Protection | Microcontroller Reset Circuit |
Use Scenario: Clamps transient surges on 5 V rail caused by inductive switching in motor drive PCBs. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy above 5.1 V to ground during ESD or load dump events. Use Value: Absorbs 1.0 W continuously and up to 730 mA peak surge (IZM) without degradation. | Use Scenario: Generates clean reset signal for ARM Cortex-M0+ microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Threshold detector holding reset active until regulated 5.1 V rail reaches valid level. Use Value: Ensures deterministic reset assertion with 10 µA leakage limiting capacitor discharge rate in RC timing networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | No "e3" RoHS suffix; tin-lead terminations only; same VZ, ZZT, IZM, and DO-41 package | Not suitable for RoHS-compliant production; requires Pb-containing solder process | Select when legacy Pb-based assembly is mandated and environmental compliance is not required |
| MMSZ4702T1G | Surface-mount SOD-123 package; 5.1 V ±5%; 250 mW rating; 10 Ω ZZT; 100 nA leakage at 3.8 V | Lower power handling and smaller footprint; unsuitable for 1 W continuous dissipation | Select for space-constrained designs where 250 mW regulation suffices and reflow compatibility is prioritized |
Compared with 1N4733A and MMSZ4702T1G, the 1N4733PE3/TR8 uniquely combines full 1 W dissipation, RoHS compliance, tape-and-reel automation support, and JEDEC-standardized parameters-making it optimal for high-reliability industrial power supplies requiring long-term component continuity.
Availability
1N4733PE3/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor references, overvoltage clamping circuits, and microcontroller reset systems requiring stable component supply across extended production lifecycles.
Supply support for 1N4733PE3/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 discrete components for aerospace, defense, and industrial markets.
The 1N4733PE3/TR8 belongs to Microsemi's legacy 1N47xxAP Zener diode product line, 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 1N4733PE3/TR8?
The 1N4733PE3/TR8 has a nominal Zener voltage of 5.1 V with a ±5% tolerance, consistent with the "A" suffix in the JEDEC 1N4733A designation. This tolerance is verified at 49 mA test current and 25 °C lead temperature, ensuring predictable regulation performance across production lots and operating conditions.
Does the 1N4733PE3/TR8 meet RoHS requirements?
Yes, the "e3" suffix in 1N4733PE3/TR8 explicitly denotes RoHS compliance per EU Directive 2011/65/EU and China RoHS II. The device uses annealed matte-tin plating on leads and void-free UL94V-0 epoxy encapsulation, with full material declarations available through Microchip's component database.
What is the maximum surge current rating for the 1N4733PE3/TR8?
The 1N4733PE3/TR8 has a maximum surge current (ISM) of 730 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25 °C ambient. This rating enables reliable transient suppression in 5 V rail protection applications without thermal runaway.
Can the 1N4733PE3/TR8 be used in surface-mount designs?
No-the 1N4733PE3/TR8 is an axial-leaded DO-41 device and is not designed for direct SMT placement. However, Microsemi offers surface-mount equivalents such as SMAJ4733A and MLL4733A; the "TR8" suffix indicates tape-and-reel packaging optimized for automated axial insertion equipment, not reflow soldering.
What is the thermal resistance of the 1N4733PE3/TR8 when mounted on a PCB?
When mounted on an FR4 board with 1 oz copper, 4 mm² pads, and 1 mm × 25 mm traces, the 1N4733PE3/TR8 exhibits a junction-to-ambient thermal resistance of 105 °C/W. This value informs heatsinking requirements and maximum allowable ambient temperature for sustained 1 W operation.
1N4733PE3/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):
- 5.1 V
- Tolerance:
- ±10%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 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)
1N4733PE3/TR8 FAQ
1.How can I place an order for 1N4733PE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4733PE3/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 1N4733PE3/TR8 reliable?
The price and inventory of 1N4733PE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4733PE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4733PE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4733PE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4733PE3/TR8?
1N4733PE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4733PE3/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 1N4733PE3/TR8?
For technical support, including 1N4733PE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4733PE3/TR8 requirements.
6.How does Aetrix verify that 1N4733PE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4733PE3/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 1N4733PE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4733PE3/TR8?
All 1N4733PE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4733PE3/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 1N4733PE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4733PE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4733PE3/TR8 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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