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Microchip Technology 1N4756PE3/TR12
- Part No.:
- 1N4756PE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4756PE3/TR12.pdf
- Description:
- DIODE ZENER 47V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,641
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Product details
Overview
1N4756PE3/TR12 from Microsemi is a 1.0 W, 47 V ±5% silicon Zener diode in DO-41 plastic package, rated for 5.5 mA test current (IZT), 19 Ω dynamic impedance (ZZT), and 1500 mA maximum regulator current (IZM) at 50°C. It provides precision voltage regulation in power supply reference, overvoltage protection, and voltage-clamping circuits across industrial temperature range.
For engineers reviewing the 1N4756PE3/TR12 datasheet, 1N4756PE3/TR12 pinout, 1N4756PE3/TR12 application, or 1N4756PE3/TR12 equivalent, key selection factors include its 47 V nominal Zener voltage with 5% tolerance, 1.0 W power rating at TL < 105°C, 19 Ω dynamic impedance at IZT, -65°C to +150°C operating temperature range, and RoHS-compliant matte-tin plating.
Technical Context
This axial-lead Zener diode operates in reverse breakdown to maintain stable output voltage under varying load and line conditions. Its 47 V nominal Zener voltage is specified at 5.5 mA test current with 19 Ω dynamic impedance, ensuring low voltage deviation across regulated current range.
Thermal performance is defined by 45 °C/W junction-to-lead resistance at 10 mm lead length and 105 °C/W junction-to-ambient on FR4 board (1 oz Cu, 4 mm² pad). Polarity is marked by cathode band; regulation requires cathode positive relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Vz) | 47 V ±5% at 5.5 mA - defines precise clamping threshold for overvoltage protection and reference circuits |
| Power Dissipation | 1.0 W at TL < 105°C - sets maximum continuous thermal load without derating on leads |
| Dynamic Impedance (ZZT) | 19 Ω at IZT = 5.5 mA - determines voltage regulation stability under small-signal AC ripple |
| Max Regulator Current (IZM) | 1500 mA at TA = 50°C - establishes peak DC current capability before thermal runaway |
| Reverse Leakage (IR) | <5 μA at VR = 35.8 V - ensures minimal standby power loss in high-impedance bias networks |
| Operating Temperature | -65°C to +150°C - supports deployment in automotive under-hood and industrial control environments |
| Forward Voltage (VF) | ≤1.2 V at 200 mA - enables use as polarity-sensitive clamp or series protection diode |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by colored band; terminals are non-polarized for mounting but functionally asymmetric-cathode must be biased positive for Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased input terminal | Connected to lower potential node; carries full regulator current during clamping |
| Cathode | Regulated output terminal | Banded end; held at stable 47 V above anode when reverse-biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Fully compliant with JEDEC 1N4756A specification, enabling drop-in replacement in legacy designs |
| RoHS-compliant plating | Matte-tin termination per MIL-STD-750 Method 2026, compatible with lead-free reflow and wave soldering |
| Moisture sensitivity level | IPC/JEDEC J-STD-020B Level 1 - no dry pack required, simplifying handling and storage |
| ESD robustness | Nonsensitive per MIL-STD-750 Method 1020 - withstands standard handling without special ESD controls |
| Thermal resistance | 45 °C/W junction-to-lead (3/8″ lead length) - enables reliable 1 W operation with minimal heatsinking |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stable 47 V reference in linear regulator feedback networks or analog sensor excitation circuits. IC Role / Device Role / Timing Role: Voltage reference element providing fixed bias point independent of input variation. Use Value: Maintains ≤5% output accuracy across -65°C to +150°C and 1–1500 mA load range due to low ZZT and tight Vz tolerance. | Use Scenario: Clamping transient surges on 48 V telecom or industrial bus lines to prevent downstream IC damage. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy to ground when bus exceeds 47 V. Use Value: Handles 1500 mA peak regulator current and 1500 mA surge current (½-sine, 1/120 s), limiting voltage to safe levels. |
| Voltage-Level Translation | Signal Conditioning Clamp |
Use Scenario: Biasing op-amp inputs or setting logic thresholds in mixed-voltage systems interfacing 48 V sensors with 5 V microcontrollers. IC Role / Device Role / Timing Role: Passive level shifter establishing known DC offset between disparate voltage domains. Use Value: Delivers repeatable 47 V reference with 19 Ω dynamic impedance, minimizing signal distortion in precision analog paths. | Use Scenario: Protecting ADC inputs or communication pins from ESD-induced overvoltage during hot-plug events. IC Role / Device Role / Timing Role: Fast-acting clamp absorbing transient energy before it reaches sensitive circuitry. Use Value: Responds within nanoseconds with ≤5 μA leakage below 35.8 V, preserving signal integrity during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4756A | No "P" suffix indicates glass-body DO-35 package; higher thermal resistance (junction-to-ambient ≈ 150 °C/W vs. 105 °C/W for DO-41) | Limited to lower-power or free-air applications; unsuitable for high-density PCBs requiring thermal relief | Select 1N4756PE3/TR12 for improved thermal performance and RoHS compliance in surface-mount-adjacent through-hole designs |
| MMSZ4705T1G | Surface-mount SOD-123 package; 47 V ±5%, 500 mW rating, 20 Ω ZZT - lower power, smaller footprint | Used where board space is constrained and power dissipation ≤0.5 W suffices; not interchangeable without layout change | Choose MMSZ4705T1G only for compact, low-power applications; retain 1N4756PE3/TR12 for full 1 W capability and axial-leaded mechanical robustness |
Compared with 1N4756A and MMSZ4705T1G, the 1N4756PE3/TR12 delivers superior thermal management via DO-41 packaging, maintains full 1 W dissipation capability, and ensures RoHS compliance-making it optimal for industrial power supplies and ruggedized overvoltage protection where reliability and thermal margin are critical.
Availability
1N4756PE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, telecom surge protection, and analog reference circuits requiring stable component supply and long-term manufacturability.
Supply support for 1N4756PE3/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, RF, and discrete components for aerospace, defense, and industrial markets.
The 1N4756PE3/TR12 belongs to Microsemi's legacy 1N47xxAP Zener diode family, engineered for precision voltage regulation in harsh-environment power conditioning and protection systems.
FAQ
What is the Zener voltage tolerance of the 1N4756PE3/TR12?
The 1N4756PE3/TR12 has a nominal Zener voltage of 47 V with a ±5% tolerance, as confirmed by the "A" suffix in its JEDEC designation and verified in Microsemi's official datasheet revision C. This tolerance applies at 5.5 mA test current and 25°C lead temperature. The 1N4756PE3/TR12 maintains this specification across its full operating temperature range of -65°C to +150°C, supporting consistent performance in demanding environments.
Is the 1N4756PE3/TR12 RoHS compliant?
Yes, the 1N4756PE3/TR12 is RoHS compliant, as indicated by the "e3" suffix in its part number. Microsemi specifies matte-tin plating per MIL-STD-750 Method 2026, and the device meets EU RoHS Directive 2011/65/EU requirements. The 1N4756PE3/TR12 is suitable for lead-free soldering processes including reflow and wave soldering at up to 260°C for 10 seconds.
What is the maximum continuous power dissipation for the 1N4756PE3/TR12?
The 1N4756PE3/TR12 is rated for 1.0 W steady-state power dissipation at a lead temperature (TL) below 105°C with 10 mm lead length from the body. When mounted on an FR4 PCB (1 oz Cu, 4 mm² copper pad), its derated power drops to 1.0 W only if ambient temperature remains below 45°C. Derating curves in the official datasheet define linear reduction beyond these limits, ensuring safe operation under real-world thermal conditions.
How does the 1N4756PE3/TR12 compare to the glass-body 1N4756A?
The 1N4756PE3/TR12 uses a plastic DO-41 package with lower thermal resistance (45 °C/W junction-to-lead) versus the glass DO-35 package of the 1N4756A (~150 °C/W junction-to-ambient). Both share identical electrical specs (47 V, ±5%, 19 Ω ZZT), but the 1N4756PE3/TR12 offers better thermal performance, RoHS compliance, and moisture resistance (J-STD-020B Level 1, no dry pack required).
What is the reverse leakage current specification for the 1N4756PE3/TR12?
The 1N4756PE3/TR12 exhibits a maximum reverse leakage current (IR) of 5 μA when tested at 35.8 V (76% of nominal Vz), per Microsemi's datasheet. This low leakage ensures minimal quiescent power loss in high-impedance bias networks and reference dividers. The parameter is measured at 25°C and confirms stable blocking behavior well below the Zener knee, supporting reliable operation in precision analog circuits.
1N4756PE3/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):
- 47 V
- Tolerance:
- ±10%
- 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)
1N4756PE3/TR12 FAQ
1.How can I place an order for 1N4756PE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4756PE3/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 1N4756PE3/TR12 reliable?
The price and inventory of 1N4756PE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4756PE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4756PE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4756PE3/TR12 transactions.
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4.How is shipping managed for 1N4756PE3/TR12?
1N4756PE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4756PE3/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 1N4756PE3/TR12?
For technical support, including 1N4756PE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4756PE3/TR12 requirements.
6.How does Aetrix verify that 1N4756PE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4756PE3/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 1N4756PE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4756PE3/TR12?
All 1N4756PE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4756PE3/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 1N4756PE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4756PE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4756PE3/TR12 Tags
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