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Microchip Technology 1N4757APE3/TR8
- Part No.:
- 1N4757APE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4757APE3/TR8.pdf
- Description:
- DIODE ZENER 51V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,920
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Product details
Overview
1N4757APE3/TR8 from Microsemi is a 1.0 W axial-lead silicon Zener diode with nominal Zener voltage 51 V, ±5% tolerance (A suffix), 5.0 mA test current (IZT), 95 Ω dynamic impedance at IZT, and maximum reverse current 5 μA at 38.8 V. It regulates voltage in power supply reference and overvoltage protection circuits across industrial temperature range.
For engineers reviewing the 1N4757APE3/TR8 datasheet, 1N4757APE3/TR8 pinout, 1N4757APE3/TR8 application, or 1N4757APE3/TR8 equivalent, key selection factors include its DO-41 package thermal resistance (45 °C/W junction-to-lead), 150 °C max operating temperature, RoHS-compliant matte-tin plating, and tape-and-reel packaging (TR8).
Technical Context
This device operates in reverse breakdown to maintain stable voltage under varying load and temperature conditions. Its Zener knee occurs at 0.25 mA (IZK), with 18 Ω knee impedance (ZZK) and 900 mA maximum surge current (ISM) for transient suppression.
Designed for DC voltage regulation, it delivers 51 V ±2.55 V regulation at 5 mA with low dynamic impedance and minimal temperature coefficient drift-typical TC near +0.065 %/°C per Figure 3 of the datasheet for 51 V devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Vz) | 51 V ±5% at 5 mA - defines regulated output voltage with tight production consistency |
| Power Dissipation | 1.0 W at 25 °C lead temperature - sets maximum continuous DC power handling |
| Dynamic Impedance (ZZT) | 95 Ω at 5 mA - determines regulation stiffness and output voltage variation under load changes |
| Reverse Leakage Current | 5 μA max at 38.8 V - ensures low standby power loss below regulation threshold |
| Surge Current (ISM) | 900 mA peak (½-sine, 1/120 s) - supports transient overvoltage clamping without failure |
| Operating Temperature | –65 °C to +150 °C - enables use in harsh environments including automotive under-hood and industrial controls |
| Thermal Resistance | 45 °C/W junction-to-lead (3/8″ lead length) - informs heatsinking requirements for sustained operation |
Pinout & Package
Package: DO-41 (DO-204AL), plastic molded epoxy case, axial-leaded, cathode indicated by band. Moisture sensitivity level 1 (no dry pack required). RoHS-compliant matte-tin plating, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node; forward voltage ≤1.2 V @ 200 mA |
| Cathode | Banded end | Connected to higher-potential node during Zener operation; defines regulation polarity |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC Registered Zener | Complies with JEDEC 1N47xxA standard for interchangeability and test methodology |
| Low Thermal Resistance | 45 °C/W junction-to-lead enables higher power utilization without external heatsink |
| ESD Robustness | Nonsensitive per MIL-STD-750 Method 1020 - reduces handling and assembly failure risk |
| Tape-and-Reel Packaging | TR8 suffix indicates EIA-296 compliant reel - supports automated SMT placement despite axial form factor |
| RoHS Compliance | e3 suffix confirms lead-free matte-tin plating and UL94V-0 epoxy body |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stable 51 V reference in linear regulator feedback networks or analog measurement front-ends. IC Role / Device Role / Timing Role: Voltage reference element providing precise DC bias point independent of input ripple. Use Value: Maintains ±2.55 V regulation window at 5 mA, enabling accurate ADC reference scaling or op-amp setpoint control. | Use Scenario: Clamping transient spikes on 48 V DC bus lines in telecom or industrial PLC systems. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy to ground when voltage exceeds 51 V threshold. Use Value: Withstands 900 mA surge pulses and holds clamping voltage within 51 V ±5%, limiting downstream component stress. |
| Voltage Monitor Threshold | Field-Programmable Logic Bias |
Use Scenario: Undervoltage lockout (UVLO) or overvoltage detection in battery-powered instrumentation. IC Role / Device Role / Timing Role: Zener-based comparator input threshold generator for discrete monitoring circuits. Use Value: Delivers repeatable 51 V trip point with <5 μA leakage at 38.8 V, minimizing false triggers in low-power wake-up logic. | Use Scenario: Providing stable 51 V bias for high-voltage FPGA configuration or programmable logic I/O banks. IC Role / Device Role / Timing Role: Precision DC bias source ensuring consistent logic-level margins under variable load. Use Value: Low 95 Ω dynamic impedance minimizes voltage droop during fast I/O switching transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4757A (non-e3, bulk) | Same electrical specs but Sn/Pb terminations and no RoHS compliance | Not suitable for lead-free manufacturing or export to EU/China RoHS-regulated markets | Select only for legacy repair or non-RoHS production environments |
| MMSZ5257ET1G (ON Semiconductor) | Surface-mount SOD-123, 500 mW rating, 51 V ±5%, 100 Ω ZZT @ 20 mA | Limited to lower-power PCB space-constrained designs; requires different layout and thermal management | Choose for compact consumer electronics where DO-41 footprint is prohibitive |
Compared with 1N4757APE3/TR8, the 1N4757A lacks RoHS compliance and tape-and-reel packaging, while MMSZ5257ET1G trades power handling and thermal performance for miniaturization-making the 1N4757APE3/TR8 optimal for robust, high-reliability 1 W regulation in through-hole industrial assemblies.
Availability
1N4757APE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, telecom voltage supervisors, and automotive body control modules requiring stable component supply and long-term lifecycle support.
Supply support for 1N4757APE3/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 components for aerospace, defense, and industrial markets.
The 1N47xxAP series was engineered for ruggedized voltage regulation in mission-critical power systems, emphasizing thermal stability, surge resilience, and extended temperature operation.
FAQ
What is the Zener voltage tolerance of the 1N4757APE3/TR8?
The 1N4757APE3/TR8 has a nominal Zener voltage of 51 V with ±5% tolerance, as indicated by the "A" suffix in the part number per JEDEC registration. This means the actual measured Vz at 5 mA test current falls between 48.45 V and 53.55 V across production lots, ensuring predictable regulation in feedback and protection circuits.
Does the 1N4757APE3/TR8 require dry packing before reflow?
No, the 1N4757APE3/TR8 is moisture sensitivity level 1 per IPC/JEDEC J-STD-020B, meaning it may be stored indefinitely at ambient conditions without dry pack or baking. Its void-free thermosetting epoxy body and RoHS-compliant matte-tin plating eliminate moisture absorption concerns during standard SMT or hand-solder processes.
What is the maximum surge current rating for the 1N4757APE3/TR8?
The 1N4757APE3/TR8 is rated for 900 mA maximum surge current (ISM), measured using a ½-sine wave pulse of 1/120 second duration at 25 °C ambient. This capability allows it to absorb short-duration overvoltage transients in DC power rails without degradation, supporting robust protection in industrial and telecom applications.
Can the 1N4757APE3/TR8 be used in surface-mount designs?
The 1N4757APE3/TR8 uses a DO-41 axial-leaded package and is not a surface-mount device. However, Microsemi offers surface-mount equivalents such as SMAJ4757A and MLL4757A for SMT-compatible implementations-these share identical electrical specs but differ in package, thermal path, and mounting method.
What does the "TR8" suffix indicate in 1N4757APE3/TR8?
"TR8" denotes EIA-296 standard tape-and-reel packaging with 8 mm carrier tape width and 1000 units per reel. This format enables automated pick-and-place assembly despite the axial-leaded DO-41 form factor, supporting high-volume manufacturing while maintaining full traceability and RoHS compliance of the e3-suffixed device.
1N4757APE3/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):
- 51 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 95 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 38.8 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)
1N4757APE3/TR8 FAQ
1.How can I place an order for 1N4757APE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4757APE3/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 1N4757APE3/TR8 reliable?
The price and inventory of 1N4757APE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4757APE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4757APE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4757APE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4757APE3/TR8?
1N4757APE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4757APE3/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 1N4757APE3/TR8?
For technical support, including 1N4757APE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4757APE3/TR8 requirements.
6.How does Aetrix verify that 1N4757APE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4757APE3/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 1N4757APE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4757APE3/TR8?
All 1N4757APE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4757APE3/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 1N4757APE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4757APE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4757APE3/TR8 Tags
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MM5Z5V1ST1G
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