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Microchip Technology 1N4755CPE3/TR12
- Part No.:
- 1N4755CPE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4755CPE3/TR12.pdf
- Description:
- DIODE ZENER 43V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,638
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Product details
Overview
1N4755CPE3/TR12 from Microsemi is a 43 V, ±2% tolerance, 1 W silicon Zener diode in DO-41 plastic package, rated for 6 mA test current, 22 Ω dynamic impedance at IZT, and 110 mA maximum regulator current at TL = 50°C. It provides precision voltage regulation in power supply reference and overvoltage protection circuits across industrial temperature range.
For engineers reviewing the 1N4755CPE3/TR12 datasheet, 1N4755CPE3/TR12 pinout, 1N4755CPE3/TR12 application, or 1N4755CPE3/TR12 equivalent, key selection criteria include Zener voltage tolerance (±2%), 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 device operates in reverse breakdown to maintain stable 43 V output across 1–110 mA regulation current, with sharp knee characteristics verified by dual-point Zener impedance measurement per MicroNote 202. Its 22 Ω dynamic impedance at 6 mA ensures low AC ripple under varying load conditions.
Designed for axial-lead mounting on FR4 PCBs with 1 oz copper, it delivers 1.0 W steady-state dissipation at TA ≤ 45°C or TL ≤ 105°C (3/8″ lead length), with thermal resistance of 105 °C/W junction-to-ambient under defined layout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 43 V ±2% at 6 mA - enables precise reference generation within tight error bands for feedback loops |
| Power Dissipation | 1.0 W at 25°C - supports continuous regulation in compact linear supplies without forced cooling |
| Dynamic Impedance (ZZT) | 22 Ω at 6 mA - minimizes output voltage variation under dynamic load transients |
| Max Regulator Current (IZM) | 110 mA at TL = 50°C - defines safe DC operating envelope for sustained clamping |
| Surge Current (ISM) | 1500 mA (½-sine, 1/120 s) - withstands short-duration overvoltage events without degradation |
| Thermal Resistance | 45 °C/W junction-to-lead - allows accurate thermal design using standard lead-length derating curves |
| Reverse Leakage | 5 μA max at 32.7 V - ensures minimal quiescent current in high-impedance bias networks |
Pinout & Package
DO-41 (DO-204AL) plastic package with axial leads; cathode indicated by band; RoHS-compliant annealed matte-tin plating; moisture sensitivity Level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to circuit ground or lower-potential rail during regulation; must be held negative relative to cathode |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to unregulated input; maintains 43 V above anode when reverse-biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Reduces calibration overhead in precision reference designs versus standard ±5% (A) or ±10% (no suffix) parts |
| RoHS-compliant "e3" suffix | Meets EU Directive 2011/65/EU with annealed matte-tin plating compatible with Pb-free soldering processes |
| Tape-and-reel packaging (TR12) | Enables automated SMT placement despite axial-lead form factor via carrier tape handling |
| JEDEC 1N47xxAP registration | Guarantees mechanical and electrical interchangeability with legacy 1N47xxA series across manufacturers |
| Level 1 moisture sensitivity | Eliminates baking preconditioning prior to assembly, reducing manufacturing cycle time and cost |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side regulation. IC Role / Device Role / Timing Role: Zener diode providing fixed 43 V reference to optocoupler input or TL431 shunt regulator. Use Value: ±2% tolerance ensures output voltage accuracy remains within ±1% over line/load/temperature without trimming. | Use Scenario: Protecting microcontroller I/O pins from transient surges on 48 V industrial bus lines. IC Role / Device Role / Timing Role: Passive clamp limiting voltage to 43 V + forward drop during ESD or inductive kick events. Use Value: 1500 mA surge rating handles repetitive 100 ns–1 µs transients without parameter shift or failure. |
| Temperature-Stable Bias Network | Current Source Setpoint |
Use Scenario: Establishing bias current for op-amp input stage in wide-temperature-range sensor signal conditioning. IC Role / Device Role / Timing Role: Zener-based current source where 43 V reference sets base-emitter voltage of PNP transistor. Use Value: Low 22 Ω dynamic impedance maintains constant current despite supply ripple up to 100 mVpp. | Use Scenario: Setting constant LED drive current in automotive interior lighting modules. IC Role / Device Role / Timing Role: Series-pass element in two-resistor current mirror configuration referenced to 43 V Zener. Use Value: 110 mA IZM supports >100 mA LED strings while maintaining regulation stability over -40°C to +125°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4755A | Same 43 V nominal, but ±5% tolerance (A suffix) and no RoHS "e3" marking | Acceptable where reference accuracy < ±3% suffices and Pb-free compliance is not required | Select when cost sensitivity outweighs tolerance and environmental compliance needs |
| MMSZ43ET1G | Surface-mount SOD-123 package, same 43 V ±5%, 500 mW rating, 30 Ω ZZT | Used in space-constrained layouts; lower power and higher impedance limit use to low-current references | Choose for automated assembly of compact PCBs where 1 W dissipation is unnecessary |
Compared with 1N4755A and MMSZ43ET1G, the 1N4755CPE3/TR12 offers tighter ±2% regulation and guaranteed RoHS compliance in a through-hole package optimized for 1 W thermal management-making it optimal for industrial power references requiring long-term stability and process compatibility.
Availability
1N4755CPE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and test equipment requiring stable component supply with full traceability and lifecycle support.
Supply support for 1N4755CPE3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N47xxAP Zener series was engineered for ruggedized voltage regulation in mission-critical systems, emphasizing thermal robustness, MIL-qualified screening options, and long-term parametric stability under extended temperature cycling.
FAQ
What is the Zener voltage tolerance of the 1N4755CPE3/TR12?
The 1N4755CPE3/TR12 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number. This means its actual breakdown voltage falls between 42.14 V and 43.86 V when measured at 6 mA test current and 25°C lead temperature. This tighter tolerance supports precision reference applications where standard ±5% (1N4755A) would require additional calibration.
Does the 1N4755CPE3/TR12 meet RoHS requirements?
Yes, the 1N4755CPE3/TR12 meets RoHS Directive 2011/65/EU, confirmed by the "e3" suffix indicating RoHS-compliant annealed matte-tin plating. Its termination is compatible with Pb-free reflow profiles up to 260°C for 10 seconds, and it carries no restricted substances above threshold limits per Annex II of the directive.
What is the maximum continuous Zener current for the 1N4755CPE3/TR12?
The maximum continuous Zener current (IZM) for the 1N4755CPE3/TR12 is 110 mA at a lead temperature (TL) of 50°C. This value decreases with rising lead temperature per the derating curve in Figure 1 of the datasheet, reaching zero at TL = 105°C. Operation beyond this limit risks thermal runaway and permanent parameter shift.
How is polarity marked on the 1N4755CPE3/TR12?
The 1N4755CPE3/TR12 uses a cathode band to indicate polarity: the banded end is the cathode and must be held at a higher potential than the anode to achieve Zener breakdown regulation. During forward bias, the device conducts with ≤1.2 V drop at 200 mA; reverse operation below 32.7 V yields only leakage current (<5 μA).
What packaging format does the 1N4755CPE3/TR12 use?
The 1N4755CPE3/TR12 ships in tape-and-reel format per EIA-296 standard, indicated by the "TR12" suffix. Each reel contains 12,000 units, enabling automated pick-and-place insertion despite its axial-lead DO-41 package. The carrier tape is designed for standard 8 mm pocket width feeders with embossed cavity geometry.
1N4755CPE3/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):
- 43 V
- Tolerance:
- ±2%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 32.7 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)
1N4755CPE3/TR12 FAQ
1.How can I place an order for 1N4755CPE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4755CPE3/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 1N4755CPE3/TR12 reliable?
The price and inventory of 1N4755CPE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4755CPE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4755CPE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4755CPE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4755CPE3/TR12?
1N4755CPE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4755CPE3/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 1N4755CPE3/TR12?
For technical support, including 1N4755CPE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4755CPE3/TR12 requirements.
6.How does Aetrix verify that 1N4755CPE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4755CPE3/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 1N4755CPE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4755CPE3/TR12?
All 1N4755CPE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4755CPE3/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 1N4755CPE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4755CPE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4755CPE3/TR12 Tags
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