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Microchip Technology 1N4751P/TR8
- Part No.:
- 1N4751P/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4751P/TR8.pdf
- Description:
- DIODE ZENER 30V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,649
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Product details
Overview
1N4751P/TR8 from Microsemi is a 30 V, 1 W axial-lead silicon Zener diode in DO-41 plastic package with ±5% voltage tolerance, 8.5 mA test current, and 40 Ω dynamic impedance at IZT, used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4751P/TR8 datasheet, 1N4751P/TR8 pinout, 1N4751P/TR8 application, or 1N4751P/TR8 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (45 °C/W junction-to-lead), surge current rating (1000 mA), RoHS-compliant "e3" plating option, and tape-and-reel packaging (TR8).
Technical Context
The 1N4751P/TR8 operates as a reverse-biased voltage reference diode with sharp breakdown knee at 30 V, specified at 8.5 mA test current and 25 °C lead temperature. Its 40 Ω dynamic impedance ensures stable regulation across load variations, while 0.25 A maximum regulator current supports moderate-power shunt applications.
Designed for operation from –65 °C to +150 °C, it features 45 °C/W junction-to-lead thermal resistance at 10 mm lead length and 105 °C/W junction-to-ambient on FR4 board-enabling reliable performance in industrial power supplies and analog front-ends without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30 V ±5% at 8.5 mA - defines precise clamping threshold for reference and protection circuits |
| Power Dissipation | 1.0 W at TL < 105 °C - sets continuous shunt current limit of 33 mA at 30 V |
| Dynamic Impedance (ZZT) | 40 Ω at IZT = 8.5 mA - determines output voltage variation under load transients |
| Max Regulator Current (IZM) | 150 mA at TA = 50 °C - defines safe peak shunt capability before thermal runaway |
| Surge Current (ISM) | 1000 mA (½-sine, 1/120 s) - enables transient overvoltage absorption without failure |
| Thermal Resistance | 45 °C/W junction-to-lead - allows direct heatsinking via leads; requires ≥10 mm lead length for full rating |
| Forward Voltage | 1.2 V max @ 200 mA - confirms standard silicon PN junction behavior for forward conduction checks |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead package with cathode band marking; body diameter 2.0–2.7 mm, overall length 4.5–5.5 mm, lead diameter 0.4–0.6 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to circuit common; must be at lower potential than cathode during regulation |
| Cathode (banded end) | Zener regulation node | Connected to input rail or protected node; maintains 30 V relative to anode when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1 W Zener | Fully compliant with JEDEC 1N47xxA series standards for interchangeability and test methodology |
| Plastic P-suffix construction | Lower thermal resistance vs. glass-body (G-suffix) variants-improves power handling in compact layouts |
| Moisture Sensitivity Level 1 | No dry-pack required per IPC/JEDEC J-STD-020B-reduces handling cost and assembly delay |
| RoHS-compliant "e3" option | Tin-plated terminals meet EU RoHS Directive 2011/65/EU without lead or hazardous substances |
| Tape-and-reel packaging (TR8) | EIA-296 standard carrier-enables automated SMT placement despite axial-lead form factor |
Applications
| Industrial Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete transistor-based regulators. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 30 V reference point for error amplifier inputs. Use Value: Maintains ±5% output accuracy across –40 °C to +85 °C ambient with <40 Ω dynamic impedance limiting ripple coupling. | Use Scenario: Protecting microcontroller I/O pins or sensor inputs from ESD or line surges. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping induced spikes to ≤30 V before reaching sensitive circuitry. Use Value: Absorbs 1000 mA surge pulses without degradation, leveraging 1 W steady-state rating for repeated event resilience. |
| DC-DC Converter Feedback Divider | Analog Signal Conditioning Reference |
Use Scenario: Setting output voltage in isolated flyback or forward converters using optocoupler feedback. IC Role / Device Role / Timing Role: Precision Zener defining upper divider node in resistor network feeding TL431 or optocoupler LED. Use Value: Enables accurate 30 V reference with minimal temperature drift (typ. ±0.05%/°C near 30 V), improving output regulation to ±1%. | Use Scenario: Biasing op-amp input stages or calibrating ADC reference buffers in data acquisition systems. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage source establishing stable DC offset or gain-setting node. Use Value: Delivers 30 V with 40 Ω impedance and <1 μA leakage at 22.8 V, minimizing loading error on high-impedance analog nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4751A | No TR8 tape-and-reel; bulk or ammo pack only; same electrical specs and DO-41 package | Not suitable for automated pick-and-place; requires manual or vibratory feeder handling | Select 1N4751P/TR8 for SMT line integration; choose 1N4751A for hand-soldered prototypes or low-volume repair |
| BZX55C30 | 30 V ±5%, 500 mW rating, DO-35 glass package, higher ZZT (70 Ω), lower IZM (100 mA) | Limited to lower-power regulation; unsuitable for >500 mW continuous dissipation or high-surge environments | Use BZX55C30 only where space constraints favor smaller DO-35 or where 1 W rating is unnecessary |
Compared with 1N4751A and BZX55C30, the 1N4751P/TR8 uniquely combines 1 W power handling, DO-41 mechanical robustness, RoHS-compliant plating, and EIA-296 tape-and-reel compatibility-making it optimal for production-grade industrial power and protection designs requiring reliability and automation support.
Availability
1N4751P/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and analog reference designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4751P/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 timing solutions for aerospace, defense, and industrial markets.
The 1N47xxAP series was developed to deliver JEDEC-standardized, high-stability Zener regulation in ruggedized plastic packages for mission-critical power management and protection functions.
FAQ
What is the Zener voltage tolerance of the 1N4751P/TR8?
The 1N4751P/TR8 has a nominal Zener voltage of 30 V with a tolerance of ±5%, as indicated by the "A" suffix in its JEDEC designation. This tolerance is guaranteed at 8.5 mA test current and 25 °C lead temperature. The 1N4751P/TR8 does not offer tighter tolerances (e.g., ±2% or ±1%)-those require C- or D-suffix variants like 1N4751CP/TR8.
Does the 1N4751P/TR8 support automated assembly?
Yes, the 1N4751P/TR8 is supplied in EIA-296 standard tape-and-reel format (TR8 designation), enabling compatibility with pick-and-place equipment. Its DO-41 axial-lead geometry is accommodated by dedicated feeders, and the RoHS-compliant matte-tin plating ensures reliable solder wetting during reflow or wave soldering processes.
What is the maximum continuous current the 1N4751P/TR8 can regulate?
The 1N4751P/TR8 supports a maximum continuous regulator current (IZM) of 150 mA at 50 °C ambient temperature. At 25 °C lead temperature, its 1.0 W power rating allows up to ~33 mA at 30 V. Derating is required above 105 °C lead temperature per the published power derating curve in the Microsemi datasheet for 1N4751P/TR8.
How does the thermal resistance of the 1N4751P/TR8 affect PCB layout?
The 1N4751P/TR8 has a junction-to-lead thermal resistance of 45 °C/W when leads are trimmed to 10 mm from the body. To achieve rated 1.0 W dissipation, PCB traces must provide adequate copper area (≥4 mm² pads) and avoid excessive thermal isolation. Shorter leads increase thermal resistance, reducing safe operating current-layout must preserve ≥10 mm lead length unless derated.
Is the 1N4751P/TR8 RoHS compliant?
Yes, the 1N4751P/TR8 carries the "e3" suffix, indicating RoHS compliance per EU Directive 2011/65/EU. Its terminals feature annealed matte-tin plating with no lead, cadmium, mercury, hexavalent chromium, PBB, or PBDE. Full compliance documentation and material declarations are available from Microchip Technology for the 1N4751P/TR8.
1N4751P/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):
- 30 V
- Tolerance:
- ±10%
- 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)
1N4751P/TR8 FAQ
1.How can I place an order for 1N4751P/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4751P/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 1N4751P/TR8 reliable?
The price and inventory of 1N4751P/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4751P/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4751P/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4751P/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4751P/TR8?
1N4751P/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4751P/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 1N4751P/TR8?
For technical support, including 1N4751P/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4751P/TR8 requirements.
6.How does Aetrix verify that 1N4751P/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4751P/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 1N4751P/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4751P/TR8?
All 1N4751P/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4751P/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 1N4751P/TR8 part is unused and in its original packaging.
Return procedure for 1N4751P/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4751P/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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MM5Z5V1ST1G
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