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Microchip Technology 1N4751CPE3/TR12
- Part No.:
- 1N4751CPE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4751CPE3/TR12.pdf
- Description:
- DIODE ZENER 30V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,481
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Product details
Overview
1N4751CPE3/TR12 from Microsemi is a 30 V, ±2% tolerance, 1 W silicon Zener diode in DO-41 plastic package, rated for 8.5 mA test current, 30 Ω dynamic impedance at IZT, and 150 mA maximum regulator current at TL = 50°C. It provides precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4751CPE3/TR12 datasheet, 1N4751CPE3/TR12 pinout, 1N4751CPE3/TR12 application, or 1N4751CPE3/TR12 equivalent, key selection factors include its tight 2% VZ tolerance, low 30 Ω Zener impedance at 8.5 mA, RoHS-compliant matte-tin plating, and TR12 tape-and-reel packaging for automated assembly.
Technical Context
This axial-lead Zener operates in reverse breakdown to maintain stable 30 V output across 1–150 mA regulation current range. Its thermal resistance is 45 °C/W junction-to-lead (3/8″ lead length) and 105 °C/W junction-to-ambient on FR4 with specified copper pads.
Designed for DC voltage reference and shunt regulation, it features a sharp knee at IZK = 0.25 mA (VZ = 22.8 V), 40 μA maximum reverse leakage at 22.8 V, and 1000 mA surge current rating under 1/120 s half-sine pulse conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30 V ±2% at IZT = 8.5 mA - ensures precise reference stability within 0.6 V band |
| Power Dissipation | 1.0 W at TL ≤ 105°C - supports continuous operation without forced cooling in standard leaded layouts |
| Dynamic Impedance (ZZT) | 30 Ω at IZT = 8.5 mA - minimizes output voltage variation under load transients |
| Max Regulator Current (IZM) | 150 mA at TL = 50°C - defines safe continuous shunt current capacity before thermal runaway |
| Reverse Leakage (IR) | 5 μA max at VR = 22.8 V - guarantees low standby power loss in high-impedance bias networks |
| Thermal Resistance (RθJL) | 45 °C/W junction-to-lead - enables accurate thermal design using lead temperature as proxy for junction temp |
| Surge Current (ISM) | 1000 mA peak, 1/120 s - withstands common transient overloads without degradation |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by color 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 system GND or lower-potential rail; carries full regulator current when active |
| Cathode | Zener output node | Banded end; supplies regulated 30 V to load; must be held positive relative to anode for conduction |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables tighter feedback loop control vs. standard ±5% parts, reducing need for post-calibration trimming |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints-ready for immediate SMT/reflow or hand-soldering |
| RoHS-compliant "e3" suffix | Meets EU RoHS Directive 2011/65/EU with annealed matte-tin plating, no lead or hexavalent chromium |
| 1.0 W power rating with 45 °C/W RθJL | Allows reliable operation up to 105°C lead temperature-supports high-density PCB layouts with minimal copper area |
| Tape-and-reel packaging (TR12) | Standard EIA-296 compliant 12 mm tape width, enabling high-speed pick-and-place placement at >15,000 UPH |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Shunt-regulated auxiliary bias supply for PWM controller ICs in offline AC/DC converters. IC Role / Device Role / Timing Role: Provides stable 30 V reference to optocoupler input, closing primary-side feedback loop. Use Value: Tight 2% tolerance ensures consistent regulation across line/load variations, improving overall output accuracy to ±3%. | Use Scenario: Precision voltage clamp in 4–20 mA transmitter front-end protecting ADC input from overvoltage faults. IC Role / Device Role / Timing Role: Acts as shunt limiter referenced to local ground, clamping sensor output at 30 V during surge events. Use Value: Low 30 Ω ZZT prevents voltage overshoot beyond 30.9 V at 10 mA fault current, preserving ADC integrity. |
| Programmable Logic Controller I/O Protection | Automotive Body Control Module Reference |
Use Scenario: Overvoltage suppression on 24 V digital input channels exposed to inductive kickback from solenoid drivers. IC Role / Device Role / Timing Role: Zener clamps transients to 30 V while diverting surge energy to ground via series resistor. Use Value: 1000 mA surge rating handles 100 V/1 A spikes per ISO 7637-2 Pulse 1/2b, extending channel lifetime. | Use Scenario: Stable reference for microcontroller internal ADC measuring battery voltage in 12 V automotive systems. IC Role / Device Role / Timing Role: Supplies regulated 30 V to ADC reference buffer, compensating for supply droop during cranking. Use Value: −65°C to +150°C operating range ensures functionality across engine bay thermal extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4751A | Same 30 V, 1 W, DO-41, but ±5% tolerance (no C suffix) and non-RoHS Sn/Pb plating | Acceptable where cost-sensitive industrial designs allow wider VZ drift; not suitable for RoHS-mandated production | Select 1N4751CPE3/TR12 when 2% tolerance and lead-free compliance are required for final BOM |
| MMSZ5256ET1G | Surface-mount SOD-123, 30 V ±5%, 500 mW, 17 Ω ZZT, 20 mA IZT | Used in space-constrained PCBs; lower power and looser tolerance limit use to low-current references or clamping | Choose MMSZ5256ET1G only if board real estate is critical and 500 mW dissipation suffices |
Compared with 1N4751A and MMSZ5256ET1G, the 1N4751CPE3/TR12 uniquely combines 2% tolerance, 1 W power, RoHS compliance, and axial-leaded manufacturability-making it optimal for high-reliability through-hole power regulation where precision and regulatory compliance intersect.
Availability
1N4751CPE3/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, programmable logic controller I/O protection, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for 1N4751CPE3/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, RF, and timing solutions for aerospace, defense, and industrial markets.
The 1N47xxAP Zener series was engineered for robust, low-cost voltage regulation in harsh environments-emphasizing wide temperature operation (−65°C to +150°C), moisture resilience (Level 1), and JEDEC-standardized performance.
FAQ
What is the Zener voltage tolerance of the 1N4751CPE3/TR12?
The 1N4751CPE3/TR12 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its nominal 30 V Zener voltage is guaranteed between 29.4 V and 30.6 V when measured at 8.5 mA test current and 25°C lead temperature. This tighter tolerance improves accuracy in feedback and reference applications compared to standard ±5% variants like the 1N4751A.
Does the 1N4751CPE3/TR12 meet RoHS requirements?
Yes, the 1N4751CPE3/TR12 meets RoHS Directive 2011/65/EU requirements. The "e3" suffix confirms RoHS-compliant matte-tin plating on its axial leads, with no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE. It is suitable for environmentally regulated production without exemption requests.
What is the maximum continuous regulator current for the 1N4751CPE3/TR12?
The maximum continuous regulator current (IZM) for the 1N4751CPE3/TR12 is 150 mA at a lead temperature (TL) of 50°C. This value decreases with rising lead temperature per the derating curve in Figure 1 of the Microsemi datasheet. At TL = 105°C, the device sustains 1.0 W dissipation but IZM drops to approximately 95 mA.
Can the 1N4751CPE3/TR12 be used in surface-mount designs?
No, the 1N4751CPE3/TR12 uses a DO-41 axial-leaded package and is intended for through-hole mounting. For surface-mount equivalents, Microsemi offers the SMAJ4751A (SMA package) and MLL4751A (SOD-123 variant), though neither carries the "C" (±2%) or "e3" (RoHS) suffixes in standard configurations. Always verify package dimensions and thermal data before substitution.
What does the "TR12" suffix indicate in 1N4751CPE3/TR12?
The "TR12" suffix indicates EIA-296 standard tape-and-reel packaging with 12 mm carrier tape width, containing 10,000 units per reel. This format supports automated pick-and-place assembly at high throughput. The "TR" denotes tape-and-reel; "12" specifies tape width-not reel size or quantity-and aligns with industry-standard feeder compatibility.
1N4751CPE3/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):
- 30 V
- Tolerance:
- ±2%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 22.8 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)
1N4751CPE3/TR12 FAQ
1.How can I place an order for 1N4751CPE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4751CPE3/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 1N4751CPE3/TR12 reliable?
The price and inventory of 1N4751CPE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4751CPE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4751CPE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4751CPE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4751CPE3/TR12?
1N4751CPE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4751CPE3/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 1N4751CPE3/TR12?
For technical support, including 1N4751CPE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4751CPE3/TR12 requirements.
6.How does Aetrix verify that 1N4751CPE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4751CPE3/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 1N4751CPE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4751CPE3/TR12?
All 1N4751CPE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4751CPE3/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 1N4751CPE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4751CPE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4751CPE3/TR12 Tags
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MM5Z5V1ST1G
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