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Microchip Technology 1N4757CP/TR8
- Part No.:
- 1N4757CP/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4757CP/TR8.pdf
- Description:
- DIODE ZENER 51V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,062
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Product details
Overview
1N4757CP/TR8 from Microsemi is a 51 V, ±5% tolerance, 1 W axial-lead silicon Zener diode in DO-41 plastic package, rated for 5.0 mA test current, 95 Ω dynamic impedance at IZT, and 1500 mA maximum regulator current at TL = 50°C. It delivers stable voltage regulation in power supply reference and overvoltage protection circuits across -65°C to +150°C.
For engineers reviewing the 1N4757CP/TR8 datasheet, 1N4757CP/TR8 pinout, 1N4757CP/TR8 application, or 1N4757CP/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 tape-and-reel packaging (TR8).
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain a stable 51 V reference across a wide current range (5–1500 mA), with sharp knee characteristics verified by dual-point Zener impedance measurement per JEDEC standards. Its DO-41 plastic encapsulation provides lower thermal resistance than glass-body variants and meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity without dry pack.
The device features a cathode band polarity indicator, 1.2 V max forward voltage at 200 mA, and is rated for 260°C soldering (10 s). It supports MIL-PRF-19500 screening when prefixed (e.g., MV1N4757CP/TR8) and complies with UL94V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 51 V ±5% at IZT = 5.0 mA - defines precise regulation point under standard test conditions |
| Power Dissipation | 1.0 W at TL = 25°C - sets maximum continuous steady-state power before thermal derating |
| Dynamic Impedance (ZZT) | 95 Ω at IZT = 5.0 mA - indicates low AC voltage variation during small-signal regulation |
| Max Regulator Current (IZM) | 1500 mA at TL = 50°C - defines peak DC current capability before thermal limit violation |
| Junction-to-Lead Thermal Resistance | 45°C/W at 3/8″ (10 mm) lead length - enables accurate thermal design for axial-lead PCB mounting |
| Reverse Leakage Current | 5 μA max at VR = 38.8 V - ensures minimal standby power loss below regulation threshold |
| Operating Temperature Range | -65°C to +150°C - supports deployment in industrial, automotive, and aerospace environments |
Pinout & Package
Package: DO-41 (DO-204AL) plastic molded case with void-free thermosetting epoxy body (UL94V-0), tin-lead or RoHS-compliant matte-tin plating, cathode indicated by axial band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node; carries forward current or reverse leakage when unregulated |
| Cathode | Banded end | Connected to higher-potential node; conducts reverse current to clamp voltage at 51 V during regulation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Fully compliant with 1N47xxA series specifications, ensuring cross-manufacturer interchangeability in legacy designs |
| Plastic construction (P suffix) | 45°C/W junction-to-lead thermal resistance - 30% lower than equivalent glass-body (G suffix) devices for improved power handling |
| RoHS-compliant (e3 suffix) | Matte-tin terminal plating meeting EU Directive 2011/65/EU - eliminates lead while maintaining solderability per MIL-STD-750 Method 2026 |
| Tape-and-reel packaging (TR8) | EIA-296 standard carrier - enables automated SMT placement despite axial-lead form factor via carrier tape indexing |
| MIL-PRF-19500 screening option | Available with MQ/MX/MV/MSP prefixes - supports high-reliability applications requiring JAN/JANTXV-level testing and traceability |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator circuits or providing precision bias in analog front-ends. IC Role / Device Role / Timing Role: Voltage reference element establishing fixed 51 V setpoint for error amplifiers or comparators. Use Value: Maintains ±5% regulation accuracy across 5–1500 mA load range, minimizing output drift due to line/load variation. | Use Scenario: Clamping transient surges on DC rails in industrial control modules or telecom power interfaces. IC Role / Device Role / Timing Role: Shunt protection device diverting excess energy above 51 V to ground during ESD or inductive kick events. Use Value: Withstands 1500 mA peak regulator current and 2000 mA surge current (½-sine, 1/120 s), limiting voltage excursion to safe levels. |
| Temperature-Stable Biasing | Calibration Reference Source |
Use Scenario: Generating temperature-compensated bias voltages for op-amp input stages in sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Zener reference with known tempco (see Figure 3) used in conjunction with compensating components to achieve <±50 ppm/°C net drift. Use Value: 51 V nominal voltage falls in region of near-zero temperature coefficient (≈0 mV/°C), enabling inherently stable bias generation. | Use Scenario: Providing traceable voltage reference in portable test equipment or field calibration tools. IC Role / Device Role / Timing Role: Primary reference node for multimeter ADC reference dividers or programmable gain amplifier calibration points. Use Value: JEDEC registration and ±5% tolerance ensure repeatable, industry-recognized reference performance without custom trimming. |
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 TR8 tape-and-reel packaging; bulk or ammo pack only; same electrical specs and DO-41 package | Not suitable for automated assembly; requires manual loading or vibratory bowl feeding | Select 1N4757CP/TR8 for SMT line integration; choose 1N4757A only for prototyping or low-volume hand-soldered builds |
| MMBZ5257BS | SOT-23 surface-mount package; 51 V ±5%, 225 mW power rating; 100 Ω ZZT; RoHS-compliant | Lower power handling and different thermal path; unsuitable for >225 mW continuous dissipation | Use MMBZ5257BS where board space is constrained and power demand ≤225 mW; retain 1N4757CP/TR8 for 1 W applications requiring axial-lead robustness |
Compared with 1N4757A and MMBZ5257BS, the 1N4757CP/TR8 uniquely combines 1 W power capability, DO-41 mechanical ruggedness, EIA-296 tape-and-reel compatibility, and JEDEC-standardized 51 V regulation-making it optimal for high-reliability, medium-power, automated production environments.
Availability
1N4757CP/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, telecom surge protection circuits, and calibration reference designs requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4757CP/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N47xxAP series was engineered for general-purpose voltage regulation in harsh-environment systems, emphasizing JEDEC compliance, thermal robustness, and screening flexibility across military and commercial grades.
FAQ
What is the Zener voltage tolerance of the 1N4757CP/TR8?
The 1N4757CP/TR8 has a nominal Zener voltage of 51 V with a ±5% tolerance, as indicated by the "A" suffix in its JEDEC part number. This tolerance is guaranteed at IZT = 5.0 mA and TL = 25°C. The "P" denotes plastic encapsulation and "TR8" specifies EIA-296 tape-and-reel packaging. The 1N4757CP/TR8 does not support tighter tolerances (e.g., ±2% or ±1%) - those require C or D suffix variants like 1N4757CP/TR8-C.
Can the 1N4757CP/TR8 be used in surface-mount designs?
The 1N4757CP/TR8 uses a DO-41 axial-lead package and is not a surface-mount device. However, Microsemi offers SMT equivalents including the SMAJ4757A (SMA package) and MLL4757A (SOD-123), both rated for 51 V and 1 W. The 1N4757CP/TR8 itself requires through-hole mounting with 3/8″ lead length for thermal compliance; attempting SMT reflow will damage the device due to mismatched thermal mass and plating.
What is the maximum surge current rating for the 1N4757CP/TR8?
The 1N4757CP/TR8 is rated for a maximum surge current (ISM) of 2000 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25°C ambient. This rating applies only to short-duration transients and assumes proper heat sinking via leads. Continuous operation above 1500 mA (IZM) at TL = 50°C violates steady-state thermal limits and may cause premature failure of the 1N4757CP/TR8.
Does the 1N4757CP/TR8 meet RoHS requirements?
Yes, the 1N4757CP/TR8 is RoHS-compliant, as confirmed by the "e3" suffix in its full manufacturer designation (1N4757CP/TR8,e3). Its terminals feature annealed matte-tin plating per MIL-STD-750 Method 2026, and the epoxy body meets UL94V-0 flammability standards. No lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE substances exceed EU Directive 2011/65/EU thresholds in the 1N4757CP/TR8.
How does thermal resistance affect the 1N4757CP/TR8's power derating?
The 1N4757CP/TR8 has a junction-to-lead thermal resistance of 45°C/W at 3/8″ (10 mm) lead length. At ambient temperatures above 25°C, power must be linearly derated: for example, at TL = 75°C, max power drops to 0.5 W. Mounting on FR4 with 4 mm² copper pads raises junction-to-ambient resistance to 105°C/W, further limiting usable power. Proper heatsinking of leads is essential to sustain full 1 W operation in the 1N4757CP/TR8.
1N4757CP/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:
- ±2%
- 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)
1N4757CP/TR8 FAQ
1.How can I place an order for 1N4757CP/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4757CP/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 1N4757CP/TR8 reliable?
The price and inventory of 1N4757CP/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4757CP/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4757CP/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4757CP/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4757CP/TR8?
1N4757CP/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4757CP/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 1N4757CP/TR8?
For technical support, including 1N4757CP/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4757CP/TR8 requirements.
6.How does Aetrix verify that 1N4757CP/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4757CP/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 1N4757CP/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4757CP/TR8?
All 1N4757CP/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4757CP/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 1N4757CP/TR8 part is unused and in its original packaging.
Return procedure for 1N4757CP/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4757CP/TR8 Tags
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