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Microchip Technology 1N4751CPE3/TR8
- Part No.:
- 1N4751CPE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4751CPE3/TR8.pdf
- Description:
- DIODE ZENER 30V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,038
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Product details
Overview
1N4751CPE3/TR8 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, 40 Ω dynamic impedance at IZT, and 5 μA reverse leakage at 22.8 V, used for precision voltage regulation in power supply feedback loops and reference circuits.
For engineers reviewing the 1N4751CPE3/TR8 datasheet, 1N4751CPE3/TR8 pinout, 1N4751CPE3/TR8 application, or 1N4751CPE3/TR8 equivalent, key selection criteria include Zener voltage tolerance (±2%), 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 Zener operates in reverse breakdown to maintain stable 30 V output across 1.0–150 mA regulation current range, with sharp knee characteristics verified by dual-point Zener impedance measurement per MicroNote 202. Its 2% voltage tolerance (C suffix) and low 40 Ω dynamic impedance ensure tight regulation under varying load conditions.
Designed for axial-lead mounting on FR4 PCBs with 1 oz copper, it delivers 1.0 W dissipation at lead temperature <105 °C (3/8″ from body) or ambient <45 °C, with thermal resistance of 105 °C/W junction-to-ambient under defined pad layout (4 mm² copper, 1 mm trace width).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 30 V ±2% at 8.5 mA - enables precise 30 V reference generation with minimal drift |
| Power Dissipation | 1.0 W at TL < 105 °C - supports continuous regulation in compact power supplies |
| Dynamic Impedance (ZZT) | 40 Ω at IZT = 8.5 mA - ensures low output variation under dynamic load changes |
| Reverse Leakage (IR) | 5 μA max at VR = 22.8 V - guarantees low quiescent current in standby mode |
| Surge Current (ISM) | 1000 mA (½-sine, 1/120 s) - withstands transient overvoltage events without degradation |
| Thermal Resistance | 45 °C/W junction-to-lead - allows direct thermal path to PCB leads for reliable heat transfer |
| Operating Temperature | −65 °C to +150 °C - suitable for industrial and automotive under-hood environments |
Pinout & Package
DO-41 (DO-204AL) plastic molded package with axial leads; cathode indicated by color band; polarity critical-banded end must be positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink in forward bias; connected to lower-potential node in Zener mode | Accepts forward current up to 200 mA (VF ≤ 1.2 V); serves as return path in regulation circuit |
| Cathode | Current source in reverse breakdown; connected to higher-potential node | Provides regulated 30 V output referenced to anode; marked by band for orientation |
Key Features
| Feature | Design Value |
|---|---|
| 2% Zener voltage tolerance (C suffix) | Enables high-accuracy voltage references without external trimming components |
| RoHS-compliant matte-tin plating (e3 suffix) | Ensures solderability per MIL-STD-750 Method 2026 and environmental compliance |
| Moisture sensitivity Level 1 (J-STD-020B) | Eliminates dry-pack requirement and simplifies SMT handling and storage |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces need for ESD protection during board assembly and field service |
| Tape-and-reel packaging (TR8 suffix) | Supports automated pick-and-place insertion with standard EIA-296 carrier tape |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener diode provides stable 30 V reference for TL431 or optocoupler LED biasing. Use Value: Tight 2% tolerance maintains ±1% output accuracy across line/load/temperature variations. | Use Scenario: Supplies excitation voltage to bridge-based pressure transducers in factory automation systems. IC Role / Device Role / Timing Role: Acts as precision shunt reference for ratiometric ADC input scaling. Use Value: Low 40 Ω dynamic impedance minimizes error from sensor current draw fluctuations. |
| Automotive Body Control Module | Programmable Logic Controller Input Protection |
Use Scenario: Clamps and regulates 30 V rail powering microcontroller peripherals in under-hood ECUs. IC Role / Device Role / Timing Role: Shunt regulator maintains stable supply despite battery transients and load dump events. Use Value: 1000 mA surge rating absorbs ISO 7637-2 Pulse 5a without failure. | Use Scenario: Protects 24 V digital input channels from overvoltage and ESD in PLC backplanes. IC Role / Device Role / Timing Role: Zener clamps induced surges to safe levels while leaking only 5 μA at normal operating voltage. Use Value: Low leakage preserves input logic threshold integrity during long-duration brownouts. |
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 nominal, but ±5% tolerance (A suffix) vs. ±2% (C suffix) | Lower accuracy; acceptable where cost outweighs precision | Select 1N4751CPE3/TR8 when reference stability > ±0.6 V is required over temperature |
| BZX85C30 | 30 V ±5%, TO-204AA (DO-41) package, 1.3 W rating, 50 Ω ZZT | Higher power margin but looser tolerance and higher impedance | Choose 1N4751CPE3/TR8 for tighter regulation in space-constrained designs needing 2% tolerance |
Compared with 1N4751A and BZX85C30, the 1N4751CPE3/TR8 offers superior voltage accuracy and lower dynamic impedance, making it optimal for feedback references and sensor excitation where regulation error directly impacts system performance.
Availability
1N4751CPE3/TR8 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, and automotive control modules requiring stable component supply with full RoHS compliance and tape-and-reel delivery.
Supply support for 1N4751CPE3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N47xx series was developed to deliver JEDEC-standardized, high-stability Zener regulation in ruggedized plastic packages for mission-critical power management and reference applications.
FAQ
What is the Zener voltage tolerance of the 1N4751CPE3/TR8?
The 1N4751CPE3/TR8 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 at 8.5 mA test current and 25 °C lead temperature, enabling high-accuracy voltage referencing in feedback and calibration circuits.
Does the 1N4751CPE3/TR8 meet RoHS requirements?
Yes, the 1N4751CPE3/TR8 meets RoHS requirements, confirmed by the "e3" suffix indicating RoHS-compliant annealed matte-tin plating on its axial leads. It complies with EU Directive 2011/65/EU and is suitable for environmentally regulated industrial and consumer electronics designs.
What is the maximum surge current rating for the 1N4751CPE3/TR8?
The 1N4751CPE3/TR8 has a maximum surge current rating of 1000 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25 °C ambient. This rating allows the device to absorb transient overvoltages-such as those from inductive switching or load dump-without permanent degradation.
How is polarity identified on the 1N4751CPE3/TR8?
Polarity on the 1N4751CPE3/TR8 is identified by a cathode band printed on the plastic DO-41 body. During Zener regulation, the banded end must be held at a higher potential than the unbanded (anode) end. Reversing polarity results in forward conduction (~1.2 V drop) rather than 30 V regulation.
What does the "TR8" suffix indicate in 1N4751CPE3/TR8?
The "TR8" suffix indicates tape-and-reel packaging per EIA-296 standards, with 8 mm carrier tape and 1000 units per reel. This format supports automated surface-mount assembly equipment and ensures consistent orientation and feeding during high-volume PCB manufacturing.
1N4751CPE3/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:
- ±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/TR8 FAQ
1.How can I place an order for 1N4751CPE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4751CPE3/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 1N4751CPE3/TR8 reliable?
The price and inventory of 1N4751CPE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4751CPE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4751CPE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4751CPE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4751CPE3/TR8?
1N4751CPE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4751CPE3/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 1N4751CPE3/TR8?
For technical support, including 1N4751CPE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4751CPE3/TR8 requirements.
6.How does Aetrix verify that 1N4751CPE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4751CPE3/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 1N4751CPE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4751CPE3/TR8?
All 1N4751CPE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4751CPE3/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 1N4751CPE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4751CPE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4751CPE3/TR8 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
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
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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