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Microchip Technology 1N4751P/TR12
- Part No.:
- 1N4751P/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4751P/TR12.pdf
- Description:
- DIODE ZENER 30V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,735
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Product details
Overview
1N4751P/TR12 from Microsemi is a 1.0 W axial-lead silicon Zener diode with nominal Zener voltage of 30 V ±5%, 8.5 mA test current (IZT), 40 Ω dynamic impedance (ZZT), and maximum reverse current of 5 μA at 22.8 V. It regulates voltage in power supply reference, overvoltage protection, and biasing circuits across industrial temperature range.
For engineers reviewing the 1N4751P/TR12 datasheet, 1N4751P/TR12 pinout, 1N4751P/TR12 application, or 1N4751P/TR12 equivalent, key selection factors include its DO-41 package thermal resistance (45 °C/W junction-to-lead), 150 °C max operating temperature, RoHS-compliant "e3" plating option, and tape-and-reel packaging (TR12).
Technical Context
This Zener operates in reverse breakdown to maintain stable voltage under varying load and temperature conditions. Its 30 V regulation point is defined at 8.5 mA IZT with 40 Ω dynamic impedance, and it exhibits 0.09 %/°C temperature coefficient per Figure 3 of the datasheet.
The device uses a void-free thermosetting epoxy body (UL94V-0), tin-lead or matte-tin plating, and cathode band polarity marking. It meets MIL-STD-750 Method 1020 for ESD insensitivity and IPC/JEDEC J-STD-020B Level 1 moisture sensitivity without dry pack requirement.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Vz) | 30 V ±5% at 8.5 mA - defines stable regulation point for reference and clamp circuits |
| Power Dissipation | 1.0 W at 25 °C - sets maximum continuous DC power handling before derating |
| Dynamic Impedance (ZZT) | 40 Ω at IZT - determines output voltage variation under changing load current |
| Reverse Leakage (IR) | 5 μA max at 22.8 V - ensures low standby power loss in high-impedance bias networks |
| Thermal Resistance | 45 °C/W junction-to-lead - enables thermal design with 3/8″ lead length mounting |
| Operating Temperature | –65 °C to +150 °C - supports deployment in extended industrial and automotive under-hood environments |
| Forward Voltage | 1.2 V max at 200 mA - defines conduction threshold when used in forward-biased protection paths |
Pinout & Package
Package: DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by colored band; body material is UL94V-0 void-free thermosetting epoxy; terminals are tin-lead or RoHS-compliant matte-tin plated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node during Zener operation; carries forward current if biased conductively |
| Cathode | Banded end | Connected to higher-potential node during Zener regulation; defines reference voltage node |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with standardized 1N47xxA series electrical and mechanical specs for interchangeability |
| 5% voltage tolerance (A suffix) | Guarantees Vz within ±1.5 V of 30 V at 25 °C, enabling predictable circuit margining |
| Plastic P-suffix construction | Delivers 45 °C/W junction-to-lead thermal resistance-lower than glass-body G-suffix alternatives |
| RoHS-compliant e3 option | Meets EU Directive 2011/65/EU with annealed matte-tin plating, solderable per MIL-STD-750 |
| Tape-and-reel packaging (TR12) | Enables automated SMT placement compatibility despite axial-leaded form factor |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator circuits or ADC reference dividers. IC Role / Device Role / Timing Role: Zener diode providing precise 30 V reference node independent of input ripple. Use Value: Maintains ±5% regulation accuracy across –65 °C to +150 °C, reducing calibration drift in embedded systems. | Use Scenario: Protecting downstream ICs from transient voltage spikes on 24 V industrial bus lines. IC Role / Device Role / Timing Role: Shunt clamping element diverting surge current above 30 V threshold. Use Value: Withstands 1000 mA peak surge (ISM) and limits clamped voltage to ≤30.5 V at rated current. |
| Bias Network Stabilizer | Temperature-Compensated Reference |
Use Scenario: Setting fixed base-emitter bias points in high-temperature amplifier stages. IC Role / Device Role / Timing Role: Voltage-setting component establishing stable DC operating point for BJT/MOSFET drivers. Use Value: Low 5 μA leakage at 22.8 V minimizes error current injection into high-impedance bias networks. | Use Scenario: Paired with complementary Zener (e.g., 1N4733A) to create near-zero TC reference string. IC Role / Device Role / Timing Role: One leg of a compensated voltage reference generating stable mid-rail or precision offset. Use Value: 30 V unit exhibits +0.09 mV/°C tempco (per Figure 3), enabling predictable cancellation with lower-voltage counterparts. |
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 TR12 tape-and-reel; bulk packaging only; identical electrical specs | Lacks automated placement support; suitable for manual or wave-solder assembly | Select 1N4751A when reel packaging is unnecessary and cost optimization is prioritized |
| MMSZ5256ET1G | Surface-mount SOD-123 package; 30 V ±5%; 100 mW rating; 30 Ω ZZT | Lower power handling (0.1 W vs. 1.0 W); unsuitable for >100 mA regulation loads | Choose MMSZ5256ET1G only for space-constrained PCBs where full 1 W dissipation is not required |
Compared with 1N4751A and MMSZ5256ET1G, the 1N4751P/TR12 uniquely combines 1 W power capability, DO-41 mechanical robustness, and TR12 automation readiness-making it optimal for industrial power rails requiring both reliability and assembly scalability.
Availability
1N4751P/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and analog bias networks requiring stable component supply with traceable sourcing and long-term lifecycle support.
Supply support for 1N4751P/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 components for aerospace, defense, and industrial markets.
The 1N47xxA series was designed specifically for general-purpose voltage regulation in ruggedized power systems where stability, temperature resilience, and JEDEC-standard interchangeability are critical.
FAQ
What is the Zener voltage tolerance of the 1N4751P/TR12?
The 1N4751P/TR12 has a nominal Zener voltage of 30 V with a ±5% tolerance, as indicated by the "A" suffix in its part number per Microsemi's JEDEC-registered specification. This means the actual measured Vz at 8.5 mA and 25 °C falls between 28.5 V and 31.5 V. The tolerance remains valid across the full operating temperature range of –65 °C to +150 °C, though voltage drift due to temperature coefficient must be accounted for in precision designs.
Does the 1N4751P/TR12 support automated assembly?
Yes, the 1N4751P/TR12 is supplied in EIA-296 standard tape-and-reel format (TR12 designation), enabling compatibility with pick-and-place equipment for axial-leaded components. Its DO-41 package dimensions and lead spacing comply with industry-standard feeders, and the matte-tin or tin-lead plating ensures reliable solder wetting during reflow or wave soldering processes.
What is the maximum surge current rating for the 1N4751P/TR12?
The 1N4751P/TR12 has a maximum non-repetitive surge current (ISM) rating of 1000 mA, measured using a ½ sine-wave pulse of 1/120 second duration at 25 °C ambient. This rating applies to transient overvoltage events such as ESD or inductive kickback, and the device maintains regulation integrity provided the average power dissipation remains within derated limits per Figure 1 of the datasheet.
How does the thermal resistance of the 1N4751P/TR12 affect PCB layout?
The 1N4751P/TR12 specifies 45 °C/W junction-to-lead thermal resistance when leads are trimmed to 3/8″ (10 mm) from the body. To achieve this rating, PCB layout must ensure adequate copper area (≥4 mm² pads) and trace width (1 mm) connecting to the leads. Exceeding 105 °C lead temperature or 45 °C ambient board temperature requires active derating per Figure 1, making thermal pad design essential for sustained 1 W operation.
Is the 1N4751P/TR12 RoHS compliant?
Yes, the 1N4751P/TR12 is RoHS compliant when ordered with the "e3" suffix (e.g., 1N4751P/TR12-e3), indicating annealed matte-tin terminal plating per EU Directive 2011/65/EU. Standard versions use tin-lead plating; the e3 variant maintains full solderability per MIL-STD-750 Method 2026 and eliminates lead content while preserving thermal and mechanical performance.
1N4751P/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:
- ±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/TR12 FAQ
1.How can I place an order for 1N4751P/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4751P/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 1N4751P/TR12 reliable?
The price and inventory of 1N4751P/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4751P/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4751P/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4751P/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4751P/TR12?
1N4751P/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4751P/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 1N4751P/TR12?
For technical support, including 1N4751P/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4751P/TR12 requirements.
6.How does Aetrix verify that 1N4751P/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4751P/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 1N4751P/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4751P/TR12?
All 1N4751P/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4751P/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 1N4751P/TR12 part is unused and in its original packaging.
Return procedure for 1N4751P/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4751P/TR12 Tags
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