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Microchip Technology 1N4757PE3/TR12
- Part No.:
- 1N4757PE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4757PE3/TR12.pdf
- Description:
- DIODE ZENER 51V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,045
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Product details
Overview
1N4757PE3/TR12 from Microsemi is a 51 V, 1 W silicon Zener diode in DO-41 plastic package with ±5% voltage tolerance, 5 mA test current, and 95 Ω dynamic impedance at IZT, used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4757PE3/TR12 datasheet, 1N4757PE3/TR12 pinout, 1N4757PE3/TR12 application, or 1N4757PE3/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (45 °C/W junction-to-lead), surge current rating (1500 mA), RoHS-compliant matte-tin plating, and tape-and-reel packaging per EIA-296.
Technical Context
This device operates in reverse-biased breakdown mode to maintain stable 51 V output across a wide current range (5 mA to 90 mA), with low knee impedance (18 Ω at 0.25 mA) ensuring sharp regulation onset. Its DO-41 axial-leaded plastic package provides moisture sensitivity Level 1 compliance and eliminates dry-pack requirements.
Designed for operation from –65 °C to +150 °C, the 1N4757PE3/TR12 delivers 1.0 W steady-state power dissipation at lead temperature <105 °C (3/8″ from body) or ambient <45 °C on FR4 board, with forward voltage ≤1.2 V at 200 mA for bidirectional circuit verification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 51 V ±5% at 5 mA - defines nominal regulation point with tight tolerance suitable for reference design |
| Power Dissipation | 1.0 W at TL < 105 °C - sets maximum continuous thermal load under lead-heatsink conditions |
| Dynamic Impedance | 95 Ω at IZT = 5 mA - determines output voltage variation under load transients |
| Max Reverse Current | 5 μA at VR = 38.8 V - confirms low leakage below regulation threshold |
| Surge Current (ISM) | 1500 mA (½-sine, 1/120 s) - supports transient overvoltage clamping without failure |
| Thermal Resistance | 45 °C/W junction-to-lead - enables thermal design using lead as heatsink path |
| Operating Temp | –65 °C to +150 °C - validated for industrial and automotive under-hood environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by band; terminals are anode and cathode only.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node during regulation |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to unregulated input to deliver stable 51 V to load |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Fully compliant with 1N47xxA series standards for interchangeability and qualification |
| RoHS-compliant "e3" suffix | Matte-tin plating meets lead-free soldering requirements (260 °C, 10 s) |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies handling and storage logistics |
| Low thermal resistance | 45 °C/W junction-to-lead - improves power derating margin vs. glass-body variants |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - reduces handling precautions in assembly |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stable 51 V reference in linear regulator feedback networks or ADC reference dividers. IC Role / Device Role / Timing Role: Voltage reference element providing precise DC bias point. Use Value: ±5% VZ tolerance and 95 Ω ZZT ensure <±0.5 V drift under 10 mA load variation. | Use Scenario: Clamping transient spikes on 48 V telecom or industrial control bus lines. IC Role / Device Role / Timing Role: Shunt overvoltage protector diverting surge current above 51 V. Use Value: 1500 mA peak surge rating handles IEC 61000-4-5 Level 4 surges without degradation. |
| DC-DC Converter Feedback | Industrial Sensor Excitation |
Use Scenario: Secondary-side voltage sensing in isolated flyback converters with optocoupler feedback. IC Role / Device Role / Timing Role: Precision Zener reference for TL431-like error amplifier biasing. Use Value: Low 18 Ω ZZK at 0.25 mA ensures stable startup and light-load regulation. | Use Scenario: Constant-voltage excitation for 4–20 mA loop-powered pressure transducers requiring 51 V headroom. IC Role / Device Role / Timing Role: Regulated bias source maintaining sensor full-scale linearity. Use Value: –65 °C to +150 °C operating range supports operation in harsh industrial enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4757A | No "P" (plastic) or "e3" (RoHS) suffix; glass-body construction, Sn/Pb plating | Higher thermal resistance (105 °C/W junction-to-ambient), not RoHS-compliant | Select when legacy Sn/Pb assembly or higher-temperature ambient mounting is required |
| MMSZ51ET1G | Surface-mount SOD-123 package, 51 V ±5%, 500 mW rating, 100 Ω ZZT | Lower power rating limits use to low-current references; no axial-leaded mounting | Select for space-constrained PCBs where 1 W dissipation is not required |
Compared with 1N4757A and MMSZ51ET1G, the 1N4757PE3/TR12 offers superior thermal performance in through-hole designs, RoHS compliance, and tape-and-reel readiness-making it optimal for high-reliability industrial power supplies requiring long-term component continuity.
Availability
1N4757PE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, telecom surge protectors, and sensor excitation circuits requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 1N4757PE3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N47xxAP series was developed to deliver JEDEC-standard, high-stability Zener regulation in ruggedized plastic packages for mission-critical power conditioning and protection applications.
FAQ
What is the Zener voltage tolerance of the 1N4757PE3/TR12?
The 1N4757PE3/TR12 has a Zener voltage tolerance of ±5%, as indicated by the "A" suffix in its JEDEC designation. This means its nominal 51 V regulation point falls between 48.45 V and 53.55 V at 5 mA test current and 25 °C lead temperature. The tolerance is guaranteed per Microsemi's registered 1N47xxA series specifications and applies across the full operating temperature range.
Does the 1N4757PE3/TR12 require dry packing before PCB assembly?
No, the 1N4757PE3/TR12 does not require dry packing. It is moisture sensitivity level (MSL) 1 per IPC/JEDEC J-STD-020B, meaning it can be stored and assembled indefinitely at standard factory humidity without baking. This is confirmed in Microsemi's official datasheet and results from its void-free thermosetting epoxy DO-41 package construction.
What is the maximum surge current rating for the 1N4757PE3/TR12?
The 1N4757PE3/TR12 has a maximum surge current (ISM) rating of 1500 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25 °C ambient. This rating enables reliable clamping of short-duration overvoltage transients in industrial and telecom power rails without permanent degradation of the Zener characteristic.
Can the 1N4757PE3/TR12 be used in surface-mount designs?
No, the 1N4757PE3/TR12 is an axial-leaded DO-41 package and is not suitable for surface-mount assembly. For SMT equivalents, Microsemi offers the SMAJ4757A and MLL4757A families. These share the same 51 V Zener voltage and ±5% tolerance but use SMA or MELF packages with different thermal and mechanical characteristics.
What does the "TR12" suffix indicate in 1N4757PE3/TR12?
"TR12" indicates tape-and-reel packaging per EIA-296 standard, with 12,000 units per reel. This format supports automated pick-and-place assembly and is distinct from bulk or ammo-pack options. The "e3" portion confirms RoHS-compliant matte-tin plating, while "P" denotes plastic (DO-41) construction versus glass-body alternatives.
1N4757PE3/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):
- 51 V
- Tolerance:
- ±10%
- 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)
1N4757PE3/TR12 FAQ
1.How can I place an order for 1N4757PE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4757PE3/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 1N4757PE3/TR12 reliable?
The price and inventory of 1N4757PE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4757PE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4757PE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4757PE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4757PE3/TR12?
1N4757PE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4757PE3/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 1N4757PE3/TR12?
For technical support, including 1N4757PE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4757PE3/TR12 requirements.
6.How does Aetrix verify that 1N4757PE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4757PE3/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 1N4757PE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4757PE3/TR12?
All 1N4757PE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4757PE3/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 1N4757PE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4757PE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4757PE3/TR12 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
Diodes Incorporated
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BZT52C15-7-F
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BZX84C3V3LT1G
onsemi
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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