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Microchip Technology 1N4755CP/TR8
- Part No.:
- 1N4755CP/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4755CP/TR8.pdf
- Description:
- DIODE ZENER 43V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,204
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Product details
Overview
1N4755CP/TR8 from Microsemi is a 1.0 W axial-lead silicon Zener diode with nominal zener voltage 43 V, ±5% tolerance (A suffix), plastic DO-41 package, 6.0 mA test current (IZT), and 22 Ω dynamic impedance (ZZT) at IZT. It regulates voltage in power supply reference and overvoltage protection circuits across -65°C to +150°C.
For engineers reviewing the 1N4755CP/TR8 datasheet, 1N4755CP/TR8 pinout, 1N4755CP/TR8 application, or 1N4755CP/TR8 equivalent, key selection factors include its 43 V regulation point, 1.0 W steady-state dissipation at TL < 105°C, 22 Ω dynamic impedance, cathode-band polarity marking, and EIA-296 tape-and-reel packaging (TR8 suffix).
Technical Context
This device operates in reverse-biased breakdown mode to maintain stable 43 V output across a wide operating current range (IZK = 0.25 mA to IZM = 110 mA at TA = 50°C). Its DO-41 plastic package delivers 45°C/W junction-to-lead thermal resistance at 10 mm lead length.
It exhibits 0.05%/°C typical temperature coefficient near 43 V, supports 260°C/10 s soldering, and complies with IPC/JEDEC J-STD-020B Level 1 moisture sensitivity-no dry pack required. Reverse leakage is limited to 5 μA at VR = 32.7 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 43 V ±5% at IZT = 6.0 mA - defines precise regulation threshold for feedback loops and clamp references. |
| Power Dissipation | 1.0 W at TL < 105°C (3/8″ lead length) - sets maximum continuous thermal load without derating. |
| Dynamic Impedance (ZZT) | 22 Ω at IZT = 6.0 mA - determines output voltage stability under varying load current. |
| Test Current (IZT) | 6.0 mA - standard bias point for VZ specification and impedance measurement. |
| Max Regulator Current (IZM) | 110 mA at TA = 50°C - peak DC current before thermal runaway under defined ambient conditions. |
| Reverse Leakage (IR) | 5 μA max at VR = 32.7 V - ensures low standby power loss in high-impedance bias networks. |
| Thermal Resistance | 45°C/W junction-to-lead - enables accurate junction temperature estimation for reliability analysis. |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead package with cathode indicated by colored band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node; forward voltage ≤1.2 V @ 200 mA. |
| Cathode | Banded end | Connected to higher-potential node during Zener operation; defines regulation polarity. |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N47xxA series | Industry-standard footprint and electrical behavior compatible with legacy designs and PCB footprints. |
| Plastic DO-41 construction (P suffix) | Lower thermal resistance vs. glass-body variants-improves power handling in compact layouts. |
| Level 1 moisture sensitivity | No dry pack or baking required prior to assembly-reduces manufacturing overhead. |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020-enables safe handling in standard production environments. |
| Tape-and-reel packaging (TR8 suffix) | EIA-296 compliant-supports automated pick-and-place placement in high-volume SMT lines. |
Applications
| Power Supply Voltage Reference | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete transistor-based regulators. IC Role / Device Role / Timing Role: Zener reference element providing fixed 43 V reference for error amplifier input. Use Value: Maintains ±5% regulation accuracy over -65°C to +150°C, enabling robust operation in industrial power supplies. | Use Scenario: Limiting transient voltage spikes on DC bus lines in motor drives or power converters. IC Role / Device Role / Timing Role: Shunt clamping device diverting surge current above 43 V to ground. Use Value: Withstands 1500 mA surge current (ISM) and limits clamping voltage to ≤43 V + (22 Ω × ΔI), protecting downstream MOSFETs. |
| Signal-Level Voltage Clamp | Programmable Threshold Detector |
Use Scenario: Protecting ADC inputs or microcontroller GPIO pins from analog signal overrange. IC Role / Device Role / Timing Role: Bidirectional clamp (with series resistor) limiting input swing to ±43 V relative to rail. Use Value: Low 22 Ω dynamic impedance ensures minimal signal distortion during clamping events. | Use Scenario: Setting precise trip point for comparator-based undervoltage lockout (UVLO) or brownout detection. IC Role / Device Role / Timing Role: Stable 43 V reference applied to comparator non-inverting input. Use Value: ±5% tolerance and low tempco enable repeatable 43 V threshold activation across temperature extremes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4755A | No TR8 tape-and-reel; bulk or ammo-pack only; same electrical specs and DO-41 package. | Not suitable for automated SMT assembly; requires manual or vibratory feed placement. | Select 1N4755CP/TR8 when using pick-and-place equipment; choose 1N4755A for prototyping or low-volume hand-soldered builds. |
| MMBZ5265BS-7-F | SOT-23 surface-mount package; 43 V, ±5%, 225 mW rating; 30 Ω ZZT @ 20 mA. | Limited to low-power signal-level regulation; cannot replace 1N4755CP/TR8 in 1 W power applications. | Use MMBZ5265BS-7-F only in space-constrained, low-current bias networks-not for power rail clamping or regulation. |
Compared with 1N4755A and MMBZ5265BS-7-F, the 1N4755CP/TR8 uniquely combines 1.0 W power handling, DO-41 axial-leaded manufacturability, and EIA-296 tape-and-reel compatibility-making it optimal for industrial power supply and surge protection designs requiring proven thermal performance and automated assembly support.
Availability
1N4755CP/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, motor drive protection circuits, and programmable voltage threshold detectors requiring stable component supply and long-term obsolescence management.
Supply support for 1N4755CP/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 discrete components for aerospace, defense, and industrial markets.
The 1N47xxAP Zener series was designed for ruggedized voltage regulation in harsh-environment power systems-emphasizing thermal robustness, JEDEC standardization, and military-grade screening options.
FAQ
What is the zener voltage tolerance of the 1N4755CP/TR8?
The 1N4755CP/TR8 has a nominal zener voltage of 43 V with ±5% tolerance, indicated by the "A" suffix in the part number per JEDEC registration. This tolerance applies at 6.0 mA test current and 25°C lead temperature. The 1N4755CP/TR8 maintains this specification across its full operating temperature range of -65°C to +150°C, supporting reliable voltage reference design in demanding environments.
Does the 1N4755CP/TR8 require dry packing before reflow soldering?
No, the 1N4755CP/TR8 does not require dry packing. It is moisture-sensitive level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored and assembled without baking or humidity-controlled handling. This simplifies manufacturing logistics and reduces risk of popcorning during reflow. The 1N4755CP/TR8's plastic DO-41 body and void-free epoxy construction ensure robust moisture resistance.
What is the maximum surge current rating for the 1N4755CP/TR8?
The 1N4755CP/TR8 is rated for a maximum surge current (ISM) of 1500 mA, measured using a ½ sine-wave pulse of 1/120 second duration at 25°C ambient. This capability allows the 1N4755CP/TR8 to absorb transient energy in overvoltage protection circuits-such as DC bus clamping in motor drives-without degradation, provided average power remains within its 1.0 W steady-state limit.
How does the thermal resistance of the 1N4755CP/TR8 affect its power handling?
The 1N4755CP/TR8 has a junction-to-lead thermal resistance of 45°C/W at 10 mm lead length, enabling direct heat conduction from the die to PCB copper or heatsinking leads. This value allows accurate junction temperature calculation (TJ = TL + (PD × θJL)) and supports full 1.0 W dissipation when lead temperature is held below 105°C-critical for sustained operation in enclosed industrial enclosures where ambient air cooling is limited.
Is the 1N4755CP/TR8 RoHS compliant?
Yes, the 1N4755CP/TR8 is RoHS compliant, as confirmed by the "e3" designation in Microsemi's official documentation for the 1N4728AP–1N4764AP,e3 family. Its terminals use annealed matte-tin plating, and its void-free thermosetting epoxy body meets UL94V-0 flammability requirements. Compliance is verified per EU Directive 2011/65/EU and applies to both the 1N4755CP/TR8 device and its EIA-296 tape-and-reel packaging.
1N4755CP/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):
- 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)
1N4755CP/TR8 FAQ
1.How can I place an order for 1N4755CP/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4755CP/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 1N4755CP/TR8 reliable?
The price and inventory of 1N4755CP/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4755CP/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4755CP/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4755CP/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4755CP/TR8?
1N4755CP/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4755CP/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 1N4755CP/TR8?
For technical support, including 1N4755CP/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4755CP/TR8 requirements.
6.How does Aetrix verify that 1N4755CP/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4755CP/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 1N4755CP/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4755CP/TR8?
All 1N4755CP/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4755CP/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 1N4755CP/TR8 part is unused and in its original packaging.
Return procedure for 1N4755CP/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4755CP/TR8 Tags
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MM5Z5V1ST1G
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