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Microchip Technology 1N4757PE3/TR8
- Part No.:
- 1N4757PE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4757PE3/TR8.pdf
- Description:
- DIODE ZENER 51V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,838
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Product details
Overview
1N4757PE3/TR8 from Microsemi is a 1.0 W, 51 V ±5% Zener diode in DO-41 plastic package, rated for 5.0 mA test current, 95 Ω dynamic impedance at IZT, and 0.25 A maximum regulator current at TA = 50°C. It provides stable voltage regulation in power supply reference, overvoltage protection, and biasing circuits across industrial temperature range.
For engineers reviewing the 1N4757PE3/TR8 datasheet, 1N4757PE3/TR8 pinout, 1N4757PE3/TR8 application, or 1N4757PE3/TR8 equivalent, key selection factors include its 51 V nominal Zener voltage, 1 W power rating at 25°C with 45°C/W junction-to-lead thermal resistance, RoHS-compliant matte-tin plating, and axial-leaded DO-41 mechanical form factor.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain a stable 51 V reference across a broad operating current range (IZK = 0.5 mA to IZM = 250 mA). Its 95 Ω dynamic impedance at 5.0 mA ensures low AC ripple sensitivity, while the -65°C to +150°C operating temperature range supports harsh-environment deployment.
The device uses silicon PN-junction construction with void-free thermosetting epoxy encapsulation (UL94V-0), cathode band polarity marking, and tin-lead or RoHS-compliant annealed matte-tin terminals solderable per MIL-STD-750 Method 2026. Thermal resistance is specified as 45°C/W junction-to-lead at 10 mm lead length.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 51 V ±5% at IZT = 5.0 mA - defines precise DC reference level under standard test conditions |
| Power Dissipation | 1.0 W at TL < 105°C (3/8″ lead length) - sets maximum continuous thermal load without derating |
| Dynamic Impedance (ZZT) | 95 Ω at IZT = 5.0 mA - determines AC voltage variation under changing load current |
| Max Regulator Current (IZM) | 250 mA at TA = 50°C - establishes peak steady-state reverse current capability |
| Thermal Resistance | 45°C/W junction-to-lead - enables thermal design with known lead-length-dependent heat path |
| Reverse Leakage (IR) | 5 μA max at VR = 38.8 V - confirms low off-state conduction below knee voltage |
| Forward Voltage | 1.2 V max at IF = 200 mA - specifies forward-bias drop for polarity-check or dual-use applications |
Pinout & Package
DO-41 (DO-204AL) axial-leaded plastic package with cathode indicated by colored 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 | Non-banded end | Connected to lower-potential node during Zener operation; used for forward conduction when required |
| Cathode | Banded end | Connected to higher-potential node during Zener regulation; defines polarity-sensitive mounting orientation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N47xxA series | Ensures cross-manufacturer compatibility and standardized electrical/mechanical behavior |
| RoHS-compliant "e3" suffix | Meets EU Directive 2011/65/EU with annealed matte-tin plating and lead-free assembly compatibility |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for SMT reflow or manual assembly |
| Low thermal resistance (45°C/W) | Enables higher power handling with minimal lead-length dependency versus glass-body alternatives |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Reduces handling precautions and eliminates need for ESD-protected workstations during assembly |
Applications
| Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator or switching converter error amplifier circuits. IC Role / Device Role / Timing Role: Provides precise 51 V reference point for comparator or op-amp input. Use Value: Maintains output regulation accuracy within ±5% despite line/load/temperature variation due to low ZZT and stable VZ tempco. | Use Scenario: Limiting transient voltage spikes on DC bus lines in motor drives or power converters. IC Role / Device Role / Timing Role: Shunts excess energy to ground when bus voltage exceeds 51 V threshold. Use Value: Absorbs up to 250 mA surge current without failure, protecting downstream MOSFETs or controllers. |
| Bias Voltage Generator | Signal Level Translation |
Use Scenario: Establishing fixed gate bias for high-side N-channel MOSFETs in half-bridge topologies. IC Role / Device Role / Timing Role: Supplies stable 51 V gate drive offset referenced to source potential. Use Value: Enables reliable MOSFET turn-on with minimal drift over -65°C to +150°C operating range. | Use Scenario: Shifting logic-level signals between 3.3 V microcontrollers and 48 V industrial sensors. IC Role / Device Role / Timing Role: Clamps signal swing to 51 V maximum, preventing receiver overvoltage damage. Use Value: Provides robust interface protection with 5 μA leakage at 38.8 V, minimizing standby power loss. |
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 "e3" RoHS suffix; tin-lead plating only; same VZ, IZT, ZZT, and package | Not suitable for lead-free assembly; requires Pb-based solder process | Select when legacy tin-lead manufacturing is maintained and RoHS compliance is not required |
| MMBZ5255BS-7-F | Surface-mount SOD-123 package; 51 V ±5%; 225 mW rating; 100 Ω ZZT at 10 mA | Lower power and smaller footprint; unsuitable for >225 mW continuous dissipation | Select for space-constrained PCBs where thermal budget permits reduced power handling |
Compared with 1N4757A and MMBZ5255BS-7-F, the 1N4757PE3/TR8 delivers full 1 W power capability in an axial-leaded, RoHS-compliant DO-41 package-making it optimal for through-hole power regulation where thermal mass and lead-form flexibility are prioritized over miniaturization.
Availability
1N4757PE3/TR8 is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and bias voltage generation requiring stable component supply across industrial, automotive, and embedded control programs.
Supply support for 1N4757PE3/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) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial applications.
The 1N47xxAP series targets general-purpose voltage regulation with JEDEC-standardized performance, offering 3.3–100 V coverage, multiple screening levels, and plastic/glass packaging options for cost-sensitive and high-reliability use cases.
FAQ
What is the Zener voltage tolerance of the 1N4757PE3/TR8?
The 1N4757PE3/TR8 has a nominal Zener voltage of 51 V with a ±5% tolerance, as indicated by the "A" suffix in its base part number (1N4757A). This tolerance applies under standard test conditions: TL = 25°C ±10°C and 90 seconds after DC current application. The "P" denotes plastic DO-41 package, and "e3" confirms RoHS-compliant matte-tin plating.
Can the 1N4757PE3/TR8 be used in surface-mount designs?
No-the 1N4757PE3/TR8 is an axial-leaded DO-41 device and is not compatible with surface-mount assembly. For SMT equivalents, consider Microsemi's MLL4757A (SOD-80) or Diodes Inc.'s MMBZ5255BS-7-F (SOD-123), both rated for 51 V but with lower power ratings. The 1N4757PE3/TR8 requires through-hole placement and wave or hand soldering.
What is the maximum steady-state current the 1N4757PE3/TR8 can regulate continuously?
The 1N4757PE3/TR8 supports a maximum regulator current (IZM) of 250 mA at ambient temperature TA = 50°C when mounted on FR4 board with specified copper area. At higher temperatures or reduced copper, derating applies per Figure 1 in the datasheet. Its 1 W power rating at TL < 105°C further constrains usable current based on thermal path design.
Does the 1N4757PE3/TR8 require moisture preconditioning before reflow?
No-the 1N4757PE3/TR8 is rated Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it has unlimited floor life and no dry-pack or baking is required prior to soldering. This simplifies handling and eliminates moisture-related popcorning risk during reflow, even at peak temperatures up to 260°C for 10 seconds.
How does the thermal resistance of the 1N4757PE3/TR8 compare to glass-body Zeners?
The 1N4757PE3/TR8 has a junction-to-lead thermal resistance of 45°C/W at 10 mm lead length-lower than equivalent glass-body (G-suffix) versions due to superior thermal conductivity of its void-free epoxy molding compound. This allows higher power dissipation in the same mechanical footprint and reduces thermal stress on solder joints under sustained load.
1N4757PE3/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:
- ±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/TR8 FAQ
1.How can I place an order for 1N4757PE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4757PE3/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 1N4757PE3/TR8 reliable?
The price and inventory of 1N4757PE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4757PE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4757PE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4757PE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4757PE3/TR8?
1N4757PE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4757PE3/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 1N4757PE3/TR8?
For technical support, including 1N4757PE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4757PE3/TR8 requirements.
6.How does Aetrix verify that 1N4757PE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4757PE3/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 1N4757PE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4757PE3/TR8?
All 1N4757PE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4757PE3/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 1N4757PE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4757PE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4757PE3/TR8 Tags
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