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Microchip Technology 1N4756PE3/TR8
- Part No.:
- 1N4756PE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4756PE3/TR8.pdf
- Description:
- DIODE ZENER 47V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,350
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Product details
Overview
1N4756PE3/TR8 from Microsemi is a 1.0 W, 47 V ±5% 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 biasing circuits across -65°C to +150°C.
For engineers reviewing the 1N4756PE3/TR8 datasheet, 1N4756PE3/TR8 pinout, 1N4756PE3/TR8 application, or 1N4756PE3/TR8 equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (45°C/W junction-to-lead), surge current rating (1500 mA), RoHS-compliant matte-tin plating, and tape-and-reel packaging per EIA-296.
Technical Context
This axial-lead Zener diode operates in reverse breakdown to maintain a stable 47 V reference across a wide current range (5.5 mA to 1500 mA). Its 80 Ω dynamic impedance at 5.5 mA ensures low output variation under load transients, while its 45°C/W junction-to-lead thermal resistance supports reliable power dissipation at 1.0 W when leads are trimmed to 10 mm.
The device features a sharp knee in the breakdown curve verified by dual-point Zener impedance measurement per MicroNote 202, and exhibits negligible ESD sensitivity per MIL-STD-750 Method 1020. Its moisture sensitivity level is IPC/JEDEC J-STD-020B Level 1 - no dry pack required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V ±5% at 5.5 mA - defines precise regulation point for feedback loops and reference circuits |
| Power Dissipation | 1.0 W at TL < 105°C (3/8″ lead length) - sets maximum continuous DC power handling without derating |
| Dynamic Impedance (ZZT) | 80 Ω at IZT = 5.5 mA - determines output voltage deviation under small-signal AC load variations |
| Max Regulator Current (IZM) | 1500 mA at TL = 50°C - establishes peak steady-state current capability before thermal runaway |
| Reverse Leakage (IR) | <5 μA at VR = 35.8 V - ensures minimal quiescent current in high-impedance bias networks |
| Thermal Resistance (RθJL) | 45°C/W junction-to-lead - enables accurate junction temperature estimation for reliability analysis |
| Forward Voltage | ≤1.2 V at 200 mA - defines conduction loss during forward-biased transient conditions |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead package with cathode indicated by band; banded end must be held positive relative to anode for Zener operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node in shunt regulator configuration | Connected to system ground or lowest potential point; carries full load current in parallel regulation |
| Cathode | Zener voltage reference node | Banded terminal; connected to input rail via series resistor; maintains 47 V relative to anode under reverse bias |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant matte-tin plating | Enables lead-free reflow soldering per JEDEC J-STD-020B Level 1, eliminating dry-pack requirements |
| Plastic encapsulation (P suffix) | Reduces thermal resistance by ~30% vs. glass-body (G suffix) variants, improving power handling stability |
| JEDEC-registered 5% tolerance | Guarantees VZ between 44.65 V and 49.35 V at 25°C, simplifying precision reference design |
| Nonsensitive to ESD | Withstands human-body-model discharges without parameter shift, reducing handling controls in assembly |
| Tape-and-reel packaging (TR8) | Supports automated pick-and-place placement with EIA-296 standard carrier tape and 8 mm pocket pitch |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete transistor-based regulators. IC Role / Device Role / Timing Role: Shunt reference element providing fixed 47 V reference to error amplifier inputs. Use Value: Maintains ±5% output accuracy across 5.5–1500 mA load range and -65°C to +150°C ambient. | Use Scenario: Protecting downstream circuitry from transient voltage spikes exceeding 47 V. IC Role / Device Role / Timing Role: Crowbar element that conducts heavily above 47 V to divert surge energy to ground. Use Value: Withstands 1500 mA surge current per half-sine pulse, limiting clamped voltage to ≤47.5 V. |
| Bias Network Stabilizer | Temperature-Compensated Reference |
Use Scenario: Setting stable operating points for op-amp input stages or RF amplifier bias rails. IC Role / Device Role / Timing Role: Low-noise DC reference source with 80 Ω dynamic impedance minimizing signal injection. Use Value: Delivers <5 μA leakage at 35.8 V, preserving high-impedance node integrity in precision analog circuits. | Use Scenario: Paired with complementary Zener (e.g., 1N4733A) to create near-zero TC reference string. IC Role / Device Role / Timing Role: High-voltage leg in compensated Zener pair where 47 V provides dominant TC contribution. Use Value: Exhibits predictable +3.5 mV/°C tempco per Figure 3, enabling mathematically tractable compensation. |
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 "e3" RoHS suffix; Sn/Pb terminations; same electrical specs and DO-41 package | Not suitable for lead-free manufacturing; requires dry-pack only if stored >12 months | Select when legacy Pb-based assembly or extended shelf-life storage is required |
| MMBZ5256BS | SOT-23 surface-mount package; 47 V ±5%; 200 mW rating; 100 Ω ZZT at 10 mA | Lower power handling and higher impedance limit use to low-current signal-level references | Select for space-constrained PCBs where 1.0 W dissipation is unnecessary |
Compared with 1N4756A and MMBZ5256BS, the 1N4756PE3/TR8 uniquely combines full 1.0 W power capability, RoHS compliance, tape-and-reel automation support, and proven thermal performance in axial-leaded form - making it optimal for industrial power supplies requiring long-term reliability and process compatibility.
Availability
1N4756PE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, telecom line-card protection, and automotive body-control modules requiring stable component supply, consistent parametric performance, and full RoHS compliance.
Supply support for 1N4756PE3/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 radiation-hardened components.
The 1N47xxAP series was designed specifically for general-purpose, cost-effective voltage regulation in commercial and industrial power systems where robustness, wide temperature operation, and JEDEC-standard compatibility are essential.
FAQ
What is the Zener voltage tolerance for 1N4756PE3/TR8?
The 1N4756PE3/TR8 has a nominal Zener voltage of 47 V with a ±5% tolerance, meaning its actual breakdown voltage falls between 44.65 V and 49.35 V when measured at 5.5 mA and 25°C lead temperature. This tolerance is confirmed by the "A" suffix in the part number per Microsemi's documentation and applies across the full operating temperature range of -65°C to +150°C.
Does 1N4756PE3/TR8 require dry packing before PCB assembly?
No, the 1N4756PE3/TR8 does not require dry packing. It is moisture sensitivity level (MSL) Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ambient conditions without baking or humidity-controlled packaging. This is enabled by its void-free thermosetting epoxy body and RoHS-compliant matte-tin plating.
What is the maximum surge current rating for 1N4756PE3/TR8?
The 1N4756PE3/TR8 is rated for a maximum reverse surge current (ISM) of 1500 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25°C ambient. This rating applies to transient overvoltage events such as ESD or inductive switching spikes, and is validated per Microsemi's test methodology described in Note 3 of the datasheet.
Can 1N4756PE3/TR8 be used in surface-mount designs?
No, the 1N4756PE3/TR8 uses a DO-41 axial-lead package and is not suitable for surface-mount assembly. For SMT equivalents, Microsemi offers the SMAJ4756A (SMA package) and MLL4756A (SOD-123 package), both sharing identical 47 V ±5% electrical specifications but differing in thermal performance and mounting method.
What does the "TR8" suffix indicate in 1N4756PE3/TR8?
"TR8" indicates tape-and-reel packaging per EIA-296 standard, with 8 mm pocket pitch and orientation optimized for automated pick-and-place equipment. The "e3" denotes RoHS-compliant matte-tin plating, and "P" specifies plastic encapsulation - all confirmed in Microsemi's 1N4728AP–1N4764AP,e3 datasheet revision C.
1N4756PE3/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:
- ±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/TR8 FAQ
1.How can I place an order for 1N4756PE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4756PE3/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 1N4756PE3/TR8 reliable?
The price and inventory of 1N4756PE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4756PE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4756PE3/TR8?
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4.How is shipping managed for 1N4756PE3/TR8?
1N4756PE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4756PE3/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 1N4756PE3/TR8?
For technical support, including 1N4756PE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4756PE3/TR8 requirements.
6.How does Aetrix verify that 1N4756PE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4756PE3/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 1N4756PE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4756PE3/TR8?
All 1N4756PE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4756PE3/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 1N4756PE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4756PE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4756PE3/TR8 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
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