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Microchip Technology 1N4733APE3/TR8
- Part No.:
- 1N4733APE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4733APE3/TR8.pdf
- Description:
- DIODE ZENER 5.1V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,143
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Product details
Overview
1N4733APE3/TR8 from Microsemi is a 5.1 V, ±5% tolerance, 1 W axial-lead silicon Zener diode in DO-41 plastic package, rated for 49 mA test current and 178 Ω dynamic impedance at IZT, used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4733APE3/TR8 datasheet, 1N4733APE3/TR8 pinout, 1N4733APE3/TR8 application, or 1N4733APE3/TR8 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (45 °C/W junction-to-lead), surge current rating (890 mA), RoHS-compliant matte-tin plating, and tape-and-reel packaging (TR8).
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable output voltage across wide current (0.25–49 mA) and temperature (−65 °C to +150 °C) ranges. Its 5.1 V nominal regulation point is defined at 49 mA test current with ≤7 Ω dynamic impedance and ≤10 μA reverse leakage at 3.8 V.
The DO-41 package provides flexible through-hole mounting with cathode band polarity marking, 0.7 g mass, UL94V-0 epoxy body, and solderability validated per MIL-STD-750 Method 2026 at 260 °C for 10 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V ±5% at 49 mA - defines stable regulation point for feedback references |
| Power Dissipation | 1.0 W at TL < 105 °C - limits continuous thermal load on lead-mounted PCBs |
| Dynamic Impedance (ZZT) | 7 Ω max at 49 mA - ensures low output voltage variation under load transients |
| Reverse Leakage (IR) | 10 μA max at 3.8 V - guarantees minimal quiescent current in standby mode |
| Thermal Resistance | 45 °C/W junction-to-lead - enables accurate thermal design with 3/8″ lead length |
| Surge Current (ISM) | 890 mA peak (½-sine, 1/120 s) - supports transient overvoltage clamping |
| Forward Voltage | 1.2 V max at 200 mA - defines conduction loss when forward-biased |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by color band; terminals are anode and cathode; no internal circuitry or multi-pin configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-bias reference node | Connected to lower-potential side during Zener operation; carries full regulator current |
| Cathode | Regulated output node | Banded end; held at stable 5.1 V above anode when reverse-biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N4733A series | Industry-standard footprint and electrical behavior for drop-in compatibility |
| RoHS-compliant "e3" suffix | Matte-tin terminal plating meeting EU Directive 2011/65/EU without lead |
| Tape-and-reel "TR8" packaging | EIA-296 compliant 8 mm carrier tape for automated SMT-compatible through-hole placement |
| Moisture sensitivity Level 1 | No dry pack required per IPC/JEDEC J-STD-020B - simplifies handling and storage |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special ESD controls in assembly |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or op-amp-based shunt regulators. IC Role / Device Role / Timing Role: Voltage reference element providing precise 5.1 V setpoint for error amplifiers. Use Value: Maintains ±5% regulation accuracy across −65 °C to +150 °C and 0.25–49 mA operating range. | Use Scenario: Protecting downstream logic inputs from transient voltage spikes on 5 V rails. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess current when rail exceeds 5.1 V. Use Value: Absorbs up to 890 mA surge current (½-sine, 1/120 s) without failure. |
| Signal Level Translation | Current Source Bias |
Use Scenario: Generating fixed bias voltages for analog sensor interfaces requiring stable excitation. IC Role / Device Role / Timing Role: Passive voltage source establishing known DC offset in signal chains. Use Value: Delivers 5.1 V with 7 Ω dynamic impedance, minimizing load-induced drift. | Use Scenario: Setting constant current in LED driver or transistor bias networks via series resistor. IC Role / Device Role / Timing Role: Stable voltage node enabling predictable I = (VCC − 5.1 V)/R calculation. Use Value: Supports 1 W continuous dissipation with 45 °C/W thermal resistance for reliable thermal margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A-T | No "e3" RoHS suffix; Sn/Pb plating; same DO-41 package and 5.1 V/1 W specs | Not suitable for RoHS-compliant production; requires leaded solder process | Select 1N4733APE3/TR8 for lead-free assembly; choose 1N4733A-T only if legacy Sn/Pb process is mandated |
| MMSZ5231B-TP | Surface-mount SOD-123 package; 5.1 V ±5%, 500 mW; higher ZZT (17 Ω) | Lower power rating and different thermal profile; unsuitable for 1 W continuous loads | Use MMSZ5231B-TP only in space-constrained, low-power designs where DO-41 mounting is impractical |
Compared with 1N4733A-T and MMSZ5231B-TP, the 1N4733APE3/TR8 uniquely combines RoHS compliance, 1 W power handling, DO-41 mechanical robustness, and tape-and-reel automation support-making it optimal for industrial power supply and protection modules requiring long-term component continuity.
Availability
1N4733APE3/TR8 is available at Aetrix Electronics and suitable for power supply reference, overvoltage clamp, and signal level translation applications requiring stable component supply across automotive, industrial control, and telecom infrastructure programs.
Supply support for 1N4733APE3/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 1N4733APE3/TR8 belongs to Microsemi's legacy 1N47xxAP Zener diode product line, engineered for ruggedized voltage regulation in harsh-environment power systems where thermal stability and long-term parametric consistency are critical.
FAQ
What is the Zener voltage tolerance of the 1N4733APE3/TR8?
The 1N4733APE3/TR8 has a nominal Zener voltage of 5.1 V with a tolerance of ±5%, as confirmed by its "A" suffix per JEDEC standard. This tolerance applies at 49 mA test current and 25 °C lead temperature. The "e3" suffix indicates RoHS-compliant matte-tin plating but does not affect voltage tolerance. Tighter tolerances (±2%, ±1%) require "C" or "D" suffixes, which are not present in this part number.
Does the 1N4733APE3/TR8 support automated assembly?
Yes, the 1N4733APE3/TR8 supports automated through-hole assembly via its "TR8" tape-and-reel packaging, compliant with EIA-296 standards. The DO-41 package is compatible with standard axial-lead insertion equipment. Its RoHS-compliant matte-tin plating ensures reliable solder wetting during wave or selective soldering processes without lead contamination concerns.
What is the maximum surge current rating for the 1N4733APE3/TR8?
The 1N4733APE3/TR8 has a maximum non-repetitive surge current (ISM) of 890 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25 °C ambient. This rating enables short-duration overvoltage clamping in power rails. Exceeding this value or applying repetitive surges without adequate cooling may cause permanent degradation of the 1N4733APE3/TR8 junction.
How does thermal resistance impact PCB layout for the 1N4733APE3/TR8?
The 1N4733APE3/TR8 specifies 45 °C/W junction-to-lead thermal resistance at 3/8″ (10 mm) lead length from the body. To maintain safe junction temperature, PCB traces must minimize thermal resistance between the leads and copper pour. For FR4 boards with 1 oz Cu, use ≥4 mm² copper pads and ≥1 mm track width over ≥25 mm length to achieve the rated 105 °C/W junction-to-ambient value.
Is the 1N4733APE3/TR8 suitable for high-reliability applications?
Yes, the 1N4733APE3/TR8 is suitable for high-reliability applications due to its qualification per MIL-STD-750 for ESD immunity (Method 1020), moisture sensitivity Level 1 (no dry pack required), UL94V-0 flammability rating, and operational range of −65 °C to +150 °C. These attributes make the 1N4733APE3/TR8 appropriate for industrial, telecom, and transportation systems where long-term parametric stability is essential.
1N4733APE3/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:
- ±5%
- 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)
1N4733APE3/TR8 FAQ
1.How can I place an order for 1N4733APE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4733APE3/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 1N4733APE3/TR8 reliable?
The price and inventory of 1N4733APE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4733APE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4733APE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4733APE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4733APE3/TR8?
1N4733APE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4733APE3/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 1N4733APE3/TR8?
For technical support, including 1N4733APE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4733APE3/TR8 requirements.
6.How does Aetrix verify that 1N4733APE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4733APE3/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 1N4733APE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4733APE3/TR8?
All 1N4733APE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4733APE3/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 1N4733APE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4733APE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4733APE3/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
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BZX84C3V3LT1G
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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