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Microchip Technology 1N4756APE3/TR8
- Part No.:
- 1N4756APE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4756APE3/TR8.pdf
- Description:
- DIODE ZENER 47V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,327
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Product details
Overview
1N4756APE3/TR8 from Microsemi is a 1.0 W, 47 V ±5% axial-lead Zener diode in DO-41 plastic package, rated for 5.5 mA test current, 80 Ω dynamic impedance at IZT, and 1500 mA maximum regulator current at TL = 50°C. It delivers stable voltage regulation in power supply reference, overvoltage protection, and precision biasing circuits across industrial temperature range.
For engineers reviewing the 1N4756APE3/TR8 datasheet, 1N4756APE3/TR8 pinout, 1N4756APE3/TR8 application, or 1N4756APE3/TR8 equivalent, key selection criteria include its 47 V nominal Zener voltage, 5.5 mA IZT, 80 Ω ZZT, -65°C to +150°C operating range, and RoHS-compliant matte-tin plating - all verified per JEDEC 1N4756A specification with P (plastic) and e3 (RoHS) suffixes.
Technical Context
This device operates in reverse breakdown to maintain a stable 47 V reference across a wide current range (1–1500 mA), with sharp knee characteristics confirmed by dual-point Zener impedance measurement per MicroNote 202. Its thermal resistance is 45°C/W junction-to-lead (3/8" lead length) and 105°C/W junction-to-ambient on FR4 board.
The 1N4756APE3/TR8 exhibits a negative temperature coefficient typical of mid-voltage Zeners (~+3 mV/°C near 47 V), and is moisture-sensitive Level 1 per J-STD-020B - requiring no dry pack. Polarity is marked by cathode band; regulation occurs with banded end positive relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V ±5% at IZT = 5.5 mA - defines primary regulation setpoint under standard test conditions |
| Power Dissipation | 1.0 W at TL ≤ 105°C (3/8" lead length) - sets maximum continuous steady-state power handling |
| Dynamic Impedance | 80 Ω at IZT = 5.5 mA - determines output voltage variation under load current changes |
| Max Regulator Current | 1500 mA at TL = 50°C - specifies peak DC current before thermal runaway risk |
| Reverse Leakage | 5 μA max at VR = 35.8 V - ensures low standby power loss in shunt regulator configurations |
| Operating Temp | -65°C to +150°C - supports deployment in automotive under-hood, industrial control, and aerospace environments |
| Forward Voltage | 1.2 V max at IF = 200 mA - relevant for polarity-check or ESD protection forward-bias use cases |
Pinout & Package
DO-41 (JEDEC DO-204AL) plastic axial-lead package with void-free UL94V-0 epoxy body, tin-lead or RoHS-compliant matte-tin plating, and cathode indicated by colored band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unbanded end) | Reference ground node | Connected to circuit common; serves as return path for Zener current during regulation |
| Cathode (banded end) | Regulated output node | Supplies stable 47 V when reverse-biased; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N4756A baseline | Ensures cross-manufacturer compatibility and standardized test methodology per industry specification |
| Plastic P-suffix construction | Delivers lower thermal resistance vs. glass-body (G-suffix) variants - improves power derating margin |
| e3 RoHS-compliant plating | Meets global environmental compliance without sacrificing solderability or long-term reliability |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and floor-life constraints - simplifies SMT and manual assembly logistics |
| Nonsensitive to ESD | Withstands MIL-STD-750 Method 1020 testing - reduces handling precautions in production environments |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback node in linear regulator or switching converter error amplifier. IC Role / Device Role / Timing Role: Shunt reference providing precise 47 V setpoint for output voltage control loop. Use Value: Maintains ±5% regulation accuracy across 1–1500 mA load range, minimizing output drift due to line/load variation. | Use Scenario: Protecting downstream ICs from transient voltage spikes on 48 V bus systems. IC Role / Device Role / Timing Role: Fast-acting crowbar element clamping surge events above 47 V threshold. Use Value: Limits peak voltage to 47 V + dynamic overshoot (≤80 Ω × spike current), preventing latch-up or gate oxide damage. |
| Bias Voltage Generator | Temperature-Stable Reference |
Use Scenario: Establishing fixed bias point for op-amp input stages or transistor amplifiers. IC Role / Device Role / Timing Role: Passive voltage source delivering low-noise, low-drift DC offset. Use Value: Provides 47 V reference with <10 mV/°C tempco drift - suitable for precision analog signal conditioning. | Use Scenario: Calibrating sensor front-ends requiring known reference voltage across extended temperature range. IC Role / Device Role / Timing Role: Primary voltage standard in metrology-grade instrumentation. Use Value: Operates reliably from -65°C to +150°C with validated 5% tolerance - enables calibration traceability in harsh environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4756A (non-e3) | Same electrical specs but Sn/Pb plating; not RoHS-compliant | Restricted to legacy or non-RoHS production programs | Select only if exempt from EU RoHS or China RoHS requirements |
| MMSZ4700T1G | Surface-mount SOD-123 package; 47 V ±5%, 10 mA IZT, 90 Ω ZZT, 500 mW rating | Lower power, smaller footprint - suited for space-constrained PCBs | Choose when board area is critical and 500 mW dissipation suffices |
Compared with 1N4756APE3/TR8, the 1N4756A lacks RoHS compliance and requires lead-free process exclusion, while MMSZ4700T1G trades 1 W power capability and axial-leaded mechanical robustness for compact SMT integration - making each suitable for distinct layout, compliance, and thermal design priorities.
Availability
1N4756APE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, telecom surge protection, and precision analog biasing requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for 1N4756APE3/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 solutions for aerospace, defense, and industrial markets.
The 1N4756APE3/TR8 belongs to Microsemi's legacy 1N47xxAP Zener family, engineered for ruggedized voltage regulation in mission-critical power and protection circuits where stability, temperature resilience, and JEDEC-standard consistency are mandatory.
FAQ
What is the Zener voltage tolerance for 1N4756APE3/TR8?
The 1N4756APE3/TR8 has a nominal Zener voltage of 47 V with a tolerance of ±5%, as indicated by the "A" suffix in the part number per JEDEC registration. This tolerance is guaranteed at IZT = 5.5 mA and TL = 25°C. The "P" denotes plastic package and "e3" confirms RoHS-compliant matte-tin plating - all consistent with Microsemi's 1N4756APE3/TR8 specification sheet.
What does the "TR8" suffix mean in 1N4756APE3/TR8?
The "TR8" suffix indicates tape-and-reel packaging per EIA-296 standard, with 8 mm carrier tape and 1000 units per reel. This format supports automated pick-and-place assembly. The base device remains electrically identical to bulk or ammo-pack versions of 1N4756APE3/TR8 - only packaging differs. Microsemi documents TR as the standard tape option for this Zener series.
Can 1N4756APE3/TR8 replace 1N4756A in existing designs?
Yes - the 1N4756APE3/TR8 is a direct functional and mechanical replacement for 1N4756A, with identical electrical parameters, DO-41 package dimensions, and axial-lead configuration. The only differences are RoHS-compliant plating (e3) and tape-and-reel packaging (TR8). No PCB or schematic changes are needed when substituting 1N4756APE3/TR8 for legacy 1N4756A.
What is the maximum continuous current for 1N4756APE3/TR8 at 75°C ambient?
At 75°C ambient on FR4 board (1 oz Cu, 4 mm² pads), the 1N4756APE3/TR8 must be derated per its 105°C/W junction-to-ambient thermal resistance. Using Figure 1 from the datasheet, power drops to ~0.65 W at 75°C, supporting ~950 mA continuous current (since P = VZ × IZ). This value assumes proper copper land pattern - exceeding it risks thermal instability in 1N4756APE3/TR8 operation.
Is 1N4756APE3/TR8 suitable for surge protection applications?
Yes - the 1N4756APE3/TR8 supports 1500 mA maximum regulator current and 2000 mA surge current (½-sine, 1/120 s) per datasheet. Its 47 V clamping level makes it appropriate for protecting 48 V systems against transients. However, for repetitive surges or high-energy events, pairing 1N4756APE3/TR8 with series impedance (e.g., current-limiting resistor) is required to avoid thermal failure.
1N4756APE3/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:
- ±5%
- 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)
1N4756APE3/TR8 FAQ
1.How can I place an order for 1N4756APE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4756APE3/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 1N4756APE3/TR8 reliable?
The price and inventory of 1N4756APE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4756APE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4756APE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4756APE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4756APE3/TR8?
1N4756APE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4756APE3/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 1N4756APE3/TR8?
For technical support, including 1N4756APE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4756APE3/TR8 requirements.
6.How does Aetrix verify that 1N4756APE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4756APE3/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 1N4756APE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4756APE3/TR8?
All 1N4756APE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4756APE3/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 1N4756APE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4756APE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4756APE3/TR8 Tags
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