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Microchip Technology 1N4733CPE3/TR12
- Part No.:
- 1N4733CPE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4733CPE3/TR12.pdf
- Description:
- DIODE ZENER 5.1V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,250
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Product details
Overview
1N4733CPE3/TR12 from Microsemi is a 5.1 V, ±2% tolerance, 1 W silicon 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. It provides stable voltage regulation in power supply reference and overvoltage protection circuits across industrial temperature range.
For engineers reviewing the 1N4733CPE3/TR12 datasheet, 1N4733CPE3/TR12 pinout, 1N4733CPE3/TR12 application, or 1N4733CPE3/TR12 equivalent, key selection criteria include its tight 2% VZ tolerance, low ZZT, JEDEC-compliant DO-41 mechanical form, RoHS-compliant matte-tin plating, and tape-and-reel packaging (TR12) for automated assembly.
Technical Context
This device operates in reverse-bias breakdown mode to maintain a stable 5.1 V reference across a wide operating current range (0.25–49 mA), with thermal resistance of 45 °C/W junction-to-lead (3/8″ lead length) and 105 °C/W junction-to-ambient on FR4 PCB. Its knee impedance is 500 Ω at 0.25 mA, supporting precise low-current regulation.
The 1N4733CPE3/TR12 features a cathode band marking, forward voltage ≤1.2 V at 200 mA, and is moisture-sensitive Level 1 per J-STD-020B-no dry pack required. It complies with MIL-STD-750 Method 1020 for ESD robustness and UL94V-0 epoxy encapsulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.1 V ±2% at 49 mA - ensures tight reference accuracy for feedback loops and precision clamping |
| Power Dissipation | 1.0 W at TL < 105 °C - supports continuous operation in compact layouts with adequate lead heatsinking |
| Dynamic Impedance (ZZT) | 7 Ω at 49 mA - minimizes output voltage variation under load transients |
| Reverse Leakage (IR) | 10 µA max at 3.8 V - guarantees low quiescent current in standby regulation paths |
| Thermal Resistance (Junction-to-Lead) | 45 °C/W - enables reliable thermal management using standard axial-lead mounting |
| Operating Temperature | −65 °C to +150 °C - suitable for under-hood automotive, industrial control, and outdoor equipment |
| Knee Impedance (ZZK) | 500 Ω at 0.25 mA - maintains regulation stability even near minimum bias current |
Pinout & Package
Package: DO-41 (JEDEC DO-204AL), axial-leaded, void-free thermosetting epoxy body, UL94V-0 rated, cathode indicated by colored band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node; reverse-biased during regulation |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to unregulated input; supplies stable 5.1 V to load or feedback network |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables high-accuracy voltage references without external trimming in power supply feedback networks |
| RoHS-compliant matte-tin plating (e3 suffix) | Supports lead-free reflow soldering up to 260 °C for 10 s while maintaining solderability and corrosion resistance |
| Tape-and-reel packaging (TR12 suffix) | Enables high-speed pick-and-place assembly with standardized EIA-296 carrier tape orientation and quantity |
| Moisture sensitivity Level 1 | Eliminates bake-out requirement prior to assembly, reducing manufacturing cost and handling risk |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Allows safe handling in standard workstations without special grounding protocols or ionization controls |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or forward converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference element providing precise 5.1 V threshold to TL431-like shunt regulator or discrete error amplifier. Use Value: Tight ±2% tolerance ensures output accuracy within ±1% over line/load/temperature, meeting Class II efficiency standards. | Use Scenario: Protecting microcontroller I/O pins or analog sensor inputs from transient overvoltage events. IC Role / Device Role / Timing Role: Clamping diode shunting excess energy to ground when input exceeds 5.1 V + forward drop. Use Value: Low 7 Ω ZZT limits clamping voltage overshoot during fast transients, preserving signal integrity. |
| Industrial Sensor Excitation | Reference Voltage Source for ADC |
Use Scenario: Providing stable excitation voltage to resistive bridge sensors (e.g., strain gauges, RTDs) in process control modules. IC Role / Device Role / Timing Role: Precision voltage source delivering constant 5.1 V to bridge top rail, independent of supply ripple. Use Value: 10 µA max IR at 3.8 V ensures minimal loading error and drift in high-impedance sensor interfaces. | Use Scenario: Generating clean reference for 10–12-bit SAR ADCs in data acquisition systems. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage reference replacing more expensive bandgap ICs where ±0.1% absolute accuracy is not required. Use Value: 500 Ω ZZK at 0.25 mA allows stable regulation even with light ADC reference loads, minimizing code spread. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4733A | Same 5.1 V nominal, but ±5% tolerance (A suffix) vs. ±2% (C suffix); otherwise identical electrical specs and DO-41 package | Acceptable where system-level calibration compensates for initial tolerance; less suitable for open-loop references | Select 1N4733CPE3/TR12 when traceable 2% VZ accuracy is required without post-assembly adjustment |
| MMSZ5231B-TP | Surface-mount SOD-123 package; same 5.1 V ±5%; 500 mW rating; higher ZZT (17 Ω); different thermal profile | Used in space-constrained designs requiring automated SMT placement; not drop-in compatible due to package and power derating | Choose MMSZ5231B-TP only when board real estate or assembly process mandates SMT; verify thermal margin at full 1 W dissipation |
Compared with 1N4733A and MMSZ5231B-TP, the 1N4733CPE3/TR12 delivers superior initial accuracy and proven axial-lead thermal performance for through-hole power regulation, while maintaining full JEDEC compatibility and RoHS compliance in tape-and-reel format.
Availability
1N4733CPE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, sensor interface modules, and overvoltage protection circuits requiring stable component supply, long-term lifecycle support, and RoHS-compliant manufacturing.
Supply support for 1N4733CPE3/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N47xx series was designed specifically for robust, cost-effective voltage regulation in high-volume industrial and commercial power systems, emphasizing JEDEC standardization, thermal reliability, and broad voltage coverage from 3.3 V to 100 V.
FAQ
What is the Zener voltage tolerance of the 1N4733CPE3/TR12?
The 1N4733CPE3/TR12 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in the part number. This means its measured VZ falls between 4.998 V and 5.202 V at 49 mA and 25 °C, enabling tighter regulation than the ±5% 1N4733A variant without requiring system-level calibration.
Does the 1N4733CPE3/TR12 require dry packing before PCB assembly?
No, the 1N4733CPE3/TR12 is moisture sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it may be stored indefinitely at ambient conditions without desiccant or dry packing. This eliminates bake-out steps prior to reflow, reducing manufacturing cycle time and cost.
What is the maximum surge current rating for the 1N4733CPE3/TR12?
The 1N4733CPE3/TR12 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. This rating supports transient overvoltage suppression in power rails and input protection circuits.
Can the 1N4733CPE3/TR12 be used in surface-mount designs?
No-the 1N4733CPE3/TR12 uses a DO-41 axial-leaded package and is not compatible with surface-mount assembly. For SMT equivalents, consider Microsemi's MLL4733 or ON Semiconductor's MMSZ5231B, which offer similar voltage ratings but in SOD-123 or SOD-323 packages.
What does the "TR12" suffix indicate in 1N4733CPE3/TR12?
The "TR12" suffix indicates tape-and-reel packaging per EIA-296 standard, with 12,000 units per reel. This format supports automated pick-and-place assembly and ensures consistent orientation (cathode band facing outward) for reliable machine vision alignment during placement.
1N4733CPE3/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):
- 5.1 V
- Tolerance:
- ±2%
- 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)
1N4733CPE3/TR12 FAQ
1.How can I place an order for 1N4733CPE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4733CPE3/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 1N4733CPE3/TR12 reliable?
The price and inventory of 1N4733CPE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4733CPE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4733CPE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4733CPE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4733CPE3/TR12?
1N4733CPE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4733CPE3/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 1N4733CPE3/TR12?
For technical support, including 1N4733CPE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4733CPE3/TR12 requirements.
6.How does Aetrix verify that 1N4733CPE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4733CPE3/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 1N4733CPE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4733CPE3/TR12?
All 1N4733CPE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4733CPE3/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 1N4733CPE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4733CPE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4733CPE3/TR12 Tags
-
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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