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Microchip Technology 1N4756CPE3/TR8
- Part No.:
- 1N4756CPE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4756CPE3/TR8.pdf
- Description:
- DIODE ZENER 47V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,676
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Product details
Overview
1N4756CPE3/TR8 from Microsemi is a 47 V, ±2% tolerance, 1 W axial-lead silicon Zener diode in DO-41 plastic package, rated for 5.5 mA test current, 19 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 industrial temperature range.
For engineers reviewing the 1N4756CPE3/TR8 datasheet, 1N4756CPE3/TR8 pinout, 1N4756CPE3/TR8 application, or 1N4756CPE3/TR8 equivalent, key selection criteria include its tight 2% VZ tolerance (C suffix), RoHS-compliant matte-tin plating (e3), tape-and-reel packaging (TR8), 45 °C/W junction-to-lead thermal resistance, and compliance with MIL-PRF-19500 screening options when prefixed.
Technical Context
This Zener operates in reverse breakdown to maintain a stable 47 V reference across a wide current range (5.5 mA to 1500 mA), with low dynamic impedance ensuring minimal output variation under load transients. Its DO-41 plastic encapsulation provides Level 1 moisture sensitivity and eliminates dry-pack requirements per J-STD-020B.
The device features a cathode band marking, tin-lead or RoHS-compliant annealed matte-tin terminals solderable per MIL-STD-750 Method 2026, and is rated for -65°C to +150°C operating/storage temperature. Forward voltage is ≤1.2 V at 200 mA, and surge current withstand is specified at 1500 mA for 1/120 s half-sine pulses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V ±2% - precise reference voltage for feedback loops and clamping thresholds |
| Power Dissipation | 1.0 W at TL < 105°C - supports continuous regulation without forced cooling in compact layouts |
| Test Current (IZT) | 5.5 mA - standard bias point for VZ measurement and impedance characterization |
| Dynamic Impedance (ZZT) | 19 Ω at IZT - low AC impedance ensures stable regulation under varying load conditions |
| Max Regulator Current (IZM) | 1500 mA at TL = 50°C - enables high-current shunt regulation or transient suppression |
| Thermal Resistance (RθJL) | 45 °C/W junction-to-lead - allows accurate thermal design using lead temperature as proxy for junction temp |
| Reverse Leakage (IR) | 5 µA max at VR = 35.8 V - ensures low standby power loss in high-impedance bias networks |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead package with cathode indicated by a single black band. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026. Polarity must be observed: cathode (banded end) is positive during Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; establishes return path for Zener current |
| Cathode | Regulated output node | Banded end; held at stable 47 V above anode when reverse-biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables precision voltage references without post-calibration in power supply feedback networks |
| RoHS-compliant matte-tin plating (e3 suffix) | Ensures lead-free assembly compatibility and long-term solder joint reliability per JEDEC standards |
| Tape-and-reel packaging (TR8 suffix) | Supports automated SMT placement despite axial-lead form factor via carrier tape handling |
| Level 1 moisture sensitivity (J-STD-020B) | Eliminates bake-out requirement before reflow, reducing manufacturing overhead and PCB stress |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Permits safe handling in standard workstations without special grounding protocols |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp for Microcontroller I/O |
|---|---|
Use Scenario: Used in TL431-based or discrete op-amp feedback networks to set output voltage in 12–48 V DC-DC converters. IC Role / Device Role / Timing Role: Precision shunt reference providing stable 47 V threshold for error amplifier comparison. Use Value: Tight 2% tolerance minimizes output voltage drift across line/load/temperature, improving system accuracy. | Use Scenario: Placed between microcontroller GPIO and rail to clamp transient spikes exceeding 47 V. IC Role / Device Role / Timing Role: Fast-acting shunt protector diverting ESD or inductive kick energy away from sensitive input structures. Use Value: 1500 mA surge rating handles repetitive 1 kV ESD events per IEC 61000-4-2 without degradation. |
| Industrial Sensor Excitation Reference | Linear Regulator Pre-Regulation Stage |
Use Scenario: Supplies stable excitation voltage to 4–20 mA transmitter bridges or RTD interfaces in process control systems. IC Role / Device Role / Timing Role: Low-drift Zener reference establishing fixed bias point for Wheatstone bridge operation. Use Value: 45 °C/W thermal resistance enables predictable VZ shift vs. ambient, supporting calibration compensation. | Use Scenario: Shunts excess input current ahead of linear regulators (e.g., LM317) to reduce dropout and thermal load. IC Role / Device Role / Timing Role: Passive pre-regulator limiting input-to-output differential voltage seen by downstream LDO. Use Value: 1 W dissipation capability allows sustained operation at 150 mA × 47 V = 7 W equivalent power reduction in series pass element. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4756A | Same 47 V, 1 W, DO-41, but ±5% tolerance (A suffix) and no RoHS or tape-and-reel designation | Acceptable where cost-sensitive designs tolerate wider output voltage variation | Select 1N4756A only if ±5% VZ meets system spec and lead-free assembly is not required |
| MMSZ4702T1G | Surface-mount SOD-123, 47 V ±5%, 500 mW, 10 Ω ZZT, 100 mA IZM | Used in space-constrained PCBs where axial leads are incompatible with layout or automation | Choose MMSZ4702T1G for high-density SMT designs accepting reduced power and looser tolerance |
Compared with 1N4756A and MMSZ4702T1G, the 1N4756CPE3/TR8 uniquely combines ±2% precision, 1 W power handling, RoHS compliance, and tape-and-reel packaging-making it optimal for industrial-grade power supplies requiring calibrated performance and production-ready logistics.
Availability
1N4756CPE3/TR8 is available at Aetrix Electronics and suitable for switch-mode power supply feedback, overvoltage clamp for microcontroller I/O, and industrial sensor excitation reference requiring stable component supply, consistent parametric performance, and full traceability.
Supply support for 1N4756CPE3/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 1N47xxAP Zener series was engineered for ruggedized voltage regulation in mission-critical power systems, emphasizing thermal stability, ESD robustness, and extended temperature operation from -65°C to +150°C.
FAQ
What is the Zener voltage tolerance of the 1N4756CPE3/TR8?
The 1N4756CPE3/TR8 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in the part number. This means its nominal 47 V breakdown voltage falls within 46.06 V to 47.94 V at 5.5 mA test current and 25°C lead temperature. This tighter tolerance supports precision regulation where ±5% variants like 1N4756A would introduce unacceptable output variation.
Does the 1N4756CPE3/TR8 meet RoHS requirements?
Yes, the 1N4756CPE3/TR8 complies with RoHS Directive 2011/65/EU, confirmed by the "e3" suffix indicating RoHS-compliant annealed matte-tin plating on its DO-41 leads. The device contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits, and is suitable for lead-free reflow soldering up to 260°C for 10 seconds.
What does the "TR8" suffix indicate in 1N4756CPE3/TR8?
The "TR8" suffix specifies tape-and-reel packaging per EIA-296 standard, with 8 mm carrier tape, 4 mm pocket depth, and 2000 units per reel. This format enables automated pick-and-place handling in high-volume manufacturing, even though the 1N4756CPE3/TR8 is an axial-lead DO-41 device-not a surface-mount component.
What is the maximum steady-state power dissipation for the 1N4756CPE3/TR8?
The 1N4756CPE3/TR8 is rated for 1.0 W steady-state power dissipation at lead temperature (TL) < 105°C with 3/8 inch (10 mm) lead length from body, or at ambient temperature (TA) < 45°C when mounted on FR4 with specified copper pad geometry. Derating is required above these temperatures per Figure 1 in the Microsemi datasheet.
How is polarity marked on the 1N4756CPE3/TR8?
The 1N4756CPE3/TR8 uses a single black cathode band to mark polarity on the DO-41 body. During Zener operation, the banded (cathode) end must be held positive relative to the unmarked (anode) end. Reversing polarity subjects the device to forward conduction (≤1.2 V @ 200 mA), disabling regulation and risking thermal overstress if forward current exceeds ratings.
1N4756CPE3/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):
- 47 V
- Tolerance:
- ±2%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 35.8 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)
1N4756CPE3/TR8 FAQ
1.How can I place an order for 1N4756CPE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4756CPE3/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 1N4756CPE3/TR8 reliable?
The price and inventory of 1N4756CPE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4756CPE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4756CPE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4756CPE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4756CPE3/TR8?
1N4756CPE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4756CPE3/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 1N4756CPE3/TR8?
For technical support, including 1N4756CPE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4756CPE3/TR8 requirements.
6.How does Aetrix verify that 1N4756CPE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4756CPE3/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 1N4756CPE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4756CPE3/TR8?
All 1N4756CPE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4756CPE3/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 1N4756CPE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4756CPE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4756CPE3/TR8 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
Diodes Incorporated
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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
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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SMAZ12-13-F
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