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Microchip Technology 1N4751PE3/TR8
- Part No.:
- 1N4751PE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4751PE3/TR8.pdf
- Description:
- DIODE ZENER 30V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,810
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Product details
Overview
1N4751PE3/TR8 from Microsemi is a 30 V, 1 W axial-lead Zener diode in DO-41 package with ±5% voltage tolerance, 8.5 mA test current (IZT), and 40 Ω dynamic impedance (ZZT) at IZT - used for precision voltage regulation in power supply feedback loops, overvoltage clamping, and reference voltage generation.
For engineers reviewing the 1N4751PE3/TR8 datasheet, 1N4751PE3/TR8 pinout, 1N4751PE3/TR8 application, or 1N4751PE3/TR8 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (45 °C/W junction-to-lead), surge current rating (1000 mA), RoHS-compliant matte-tin plating, and tape-and-reel packaging (TR8).
Technical Context
This device operates in reverse breakdown to maintain stable 30 V across its terminals over a wide current range (0.25–150 mA), with low knee impedance (30 Ω at IZK = 0.25 mA) ensuring sharp regulation onset. Its DO-41 plastic package provides moisture sensitivity Level 1 per J-STD-020B and eliminates dry-pack requirements.
Designed for operation from –65 °C to +150 °C, it delivers 1.0 W steady-state dissipation at TL < 105 °C (3/8″ lead length) or TA < 45 °C on FR4 board, with forward voltage ≤1.2 V at 200 mA - enabling bidirectional protection and low-loss biasing in dual-role circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30 V ±5% at 8.5 mA - defines precise clamping threshold for 24 V system rail protection |
| Power Dissipation | 1.0 W at 25 °C - supports continuous regulation without heatsinking in low-power analog supplies |
| Dynamic Impedance (ZZT) | 40 Ω at IZT = 8.5 mA - ensures minimal output voltage variation under load transients |
| Max Reverse Current (IR) | 5 μA at VR = 22.8 V - guarantees low leakage in high-impedance reference nodes |
| Surge Current (ISM) | 1000 mA (½-sine, 1/120 s) - withstands brief overvoltage events in industrial power inputs |
| Thermal Resistance | 45 °C/W junction-to-lead - enables accurate thermal design with standard lead-forming practices |
| Operating Temperature | –65 °C to +150 °C - qualified for automotive engine bay and industrial control cabinet environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead 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 | Reverse-biased reference terminal | Connected to lower-potential node (e.g., ground or return path) during Zener operation |
| Cathode | Regulated output terminal | Banded end; connects to voltage rail being stabilized - polarity critical for regulation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N4751A series | Industry-standard footprint and electrical behavior - ensures compatibility with legacy designs and PCB footprints |
| RoHS-compliant "e3" suffix | Matte-tin plating meets EU RoHS Directive 2011/65/EU - no lead or hazardous substances in termination finish |
| Tape-and-reel "TR8" packaging | EIA-296 compliant 8 mm tape - enables automated SMT placement despite axial-lead form factor |
| Moisture Sensitivity Level 1 | No dry-pack required per IPC/JEDEC J-STD-020B - simplifies handling and eliminates bake-out prior to assembly |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - survives >4 kV HBM without parameter shift, reducing ESD mitigation cost |
Applications
| Industrial Power Supply Feedback | Automotive Battery Clamp Circuit |
|---|---|
Use Scenario: Regulating output of isolated flyback converter via optocoupler feedback network. IC Role / Device Role / Timing Role: Voltage reference element setting error amplifier threshold in secondary-side regulation loop. Use Value: 30 V Zener voltage matches 24 V nominal rail with 25% headroom; ±5% tolerance ensures consistent loop gain across production units. |
Use Scenario: Clamping 12 V battery line against load-dump transients up to 60 V in engine control modules. IC Role / Device Role / Timing Role: Shunt protector diverting surge current away from downstream LDOs and microcontrollers. Use Value: 1000 mA surge rating absorbs ISO 7637-2 Pulse 5a energy without degradation; DO-41 mechanical robustness withstands vibration. |
| Programmable Logic Controller Input Protection | Test Equipment Reference Voltage Source |
Use Scenario: Protecting 24 V digital input channels from field-wiring faults and induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp limiting input voltage to safe levels for opto-isolator LED anode. Use Value: 40 Ω dynamic impedance maintains clamping voltage within 0.4 V of 30 V under 100 mA fault current - preserving noise margin. |
Use Scenario: Providing stable 30 V reference for calibrating multimeter front-end ADCs and DACs. IC Role / Device Role / Timing Role: Precision shunt reference supplying low-noise, temperature-stable voltage to instrumentation amplifier. Use Value: Low 30 Ω knee impedance at 0.25 mA ensures stable turn-on; –65 °C to +150 °C rating supports calibration across environmental chambers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4751A (non-e3, non-TR) | Same electrical specs but Sn/Pb plating and bulk packaging - not RoHS-compliant or tape-and-reel ready | Limited to legacy industrial assemblies where Pb exemption applies and manual loading is acceptable | Select only if RoHS compliance and automated placement are not required |
| MMSZ5256ET1G (ON Semiconductor) | Surface-mount SOD-123 package; 30 V ±5%, 190 mW Pd - lower power, smaller footprint, higher thermal resistance (350 °C/W) | Suitable for space-constrained PCBs but requires derating above 70 °C ambient; not drop-in for through-hole layouts | Choose when board area is critical and power demand stays below 150 mW |
Compared with 1N4751PE3/TR8, the 1N4751A lacks RoHS compliance and automated handling support, while MMSZ5256ET1G trades mechanical robustness and 1 W capability for miniaturization - making 1N4751PE3/TR8 optimal for high-reliability through-hole regulation where thermal and surge performance are prioritized.
Availability
1N4751PE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, automotive clamping circuits, and programmable logic controller input protection requiring stable component supply and full traceability.
Supply support for 1N4751PE3/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 1N4751PE3/TR8 belongs to Microsemi's legacy 1N47xxAP Zener series - engineered for ruggedized voltage regulation in harsh-environment power systems where long-term stability and surge resilience are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N4751PE3/TR8?
The 1N4751PE3/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 measured at 8.5 mA test current and 25 °C lead temperature, and is guaranteed across the full operating temperature range of –65 °C to +150 °C per Microsemi's published specifications.
Does the 1N4751PE3/TR8 require dry-pack handling per J-STD-020?
No, the 1N4751PE3/TR8 is rated Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it does not absorb significant moisture during standard factory storage and requires no dry-packaging or baking prior to soldering - simplifying manufacturing logistics and reducing process risk.
What is the maximum surge current rating for the 1N4751PE3/TR8?
The 1N4751PE3/TR8 is rated for a maximum non-repetitive reverse surge current (ISM) of 1000 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25 °C ambient. This rating enables reliable transient suppression in automotive load-dump and industrial switching surge scenarios.
Is the 1N4751PE3/TR8 RoHS-compliant?
Yes, the "e3" suffix in 1N4751PE3/TR8 explicitly denotes RoHS compliance: the device uses annealed matte-tin plating instead of tin-lead, meeting EU Directive 2011/65/EU requirements with no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE substances above threshold limits.
What package type does the 1N4751PE3/TR8 use?
The 1N4751PE3/TR8 uses the DO-41 (also designated DO-204AL) axial-lead plastic package - a JEDEC-standard outline with 0.375″ (9.5 mm) body length, 0.030″ (0.76 mm) lead diameter, and void-free thermosetting epoxy body rated UL94V-0. The cathode is marked by a visible color band on the body.
1N4751PE3/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)
1N4751PE3/TR8 FAQ
1.How can I place an order for 1N4751PE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4751PE3/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 1N4751PE3/TR8 reliable?
The price and inventory of 1N4751PE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4751PE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4751PE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4751PE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4751PE3/TR8?
1N4751PE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4751PE3/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 1N4751PE3/TR8?
For technical support, including 1N4751PE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4751PE3/TR8 requirements.
6.How does Aetrix verify that 1N4751PE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4751PE3/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 1N4751PE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4751PE3/TR8?
All 1N4751PE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4751PE3/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 1N4751PE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4751PE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4751PE3/TR8 Tags
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MM5Z5V1ST1G
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