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Microchip Technology 1N4755APE3/TR8
- Part No.:
- 1N4755APE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4755APE3/TR8.pdf
- Description:
- DIODE ZENER 43V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,906
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Product details
Overview
1N4755APE3/TR8 from Microsemi is a 1.0 W, 43 V ±5% Zener diode in DO-41 plastic package, rated for 6.0 mA test current, 22 Ω dynamic impedance at IZT, and 1500 mA maximum regulator current at TL = 50°C. It provides stable voltage regulation in power supply reference, overvoltage protection, and biasing circuits across industrial temperature range.
For engineers reviewing the 1N4755APE3/TR8 datasheet, 1N4755APE3/TR8 pinout, 1N4755APE3/TR8 application, or 1N4755APE3/TR8 equivalent, key selection factors include its 43 V nominal Zener voltage, 1.0 W power rating at 25°C with defined derating, DO-41 axial-leaded mechanical form, and RoHS-compliant matte-tin plating per MIL-STD-750 Method 2026.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain a stable 43 V reference across a wide operating current range (6.0 mA IZT to 110 mA IZM at TL = 50°C) and temperature (-65°C to +150°C). Its 22 Ω dynamic impedance at IZT ensures low AC variation under regulated load conditions.
The device uses silicon junction technology with void-free thermosetting epoxy encapsulation (UL94V-0), cathode band polarity marking, and moisture sensitivity level 1 per IPC/JEDEC J-STD-020B-no dry pack required. Thermal resistance is 45°C/W junction-to-lead (3/8" lead length) and 105°C/W junction-to-ambient on FR4 board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 43 V ±5% at 6.0 mA, defining precise DC reference point for feedback or clamping |
| Power Dissipation | 1.0 W at 25°C ambient, derates linearly above 45°C on PCB or 105°C at lead |
| Dynamic Impedance (ZZT) | 22 Ω at 6.0 mA, limiting AC ripple transmission in regulation path |
| Maximum Regulator Current (IZM) | 110 mA at TL = 50°C, setting upper safe continuous conduction limit |
| Reverse Leakage (IR) | 5 μA max at 32.7 V, ensuring minimal standby current in high-impedance bias networks |
| Forward Voltage | 1.2 V max at 200 mA, supporting use as clamp or series rectifier in dual-role designs |
| Thermal Resistance | 45°C/W junction-to-lead (3/8" lead), enabling thermal modeling for lead-mounted heatsinking |
Pinout & Package
DO-41 (JEDEC DO-204AL) axial-leaded plastic 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 conduction path when biased >1.2 V |
| Cathode | Banded end | Connected to higher-potential node during Zener operation; defines regulated output reference point |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC Registered 1N4755A Series | Industry-standard part number ensuring cross-manufacturer compatibility and design continuity |
| Plastic Encapsulation (P suffix) | Lower thermal resistance vs. glass-body variants, improving power handling in compact layouts |
| RoHS Compliance (e3 suffix) | Lead-free matte-tin plating meeting EU Directive 2011/65/EU without performance trade-offs |
| Moisture Sensitivity Level 1 | No dry pack or baking required before reflow, reducing manufacturing overhead |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020, eliminating need for special handling in assembly |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator or switching converter error amplifier loop. IC Role / Device Role / Timing Role: Zener diode providing fixed 43 V reference to comparator or op-amp input. Use Value: Enables accurate output regulation despite line/load variations due to tight 5% tolerance and low 22 Ω ZZT. | Use Scenario: Clamping transient surges on 36–48 V DC bus lines in industrial control systems. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy to ground when bus exceeds 43 V. Use Value: Withstands 1500 mA surge current (½-sine, 1/120 s), protecting downstream MOSFETs and controllers. |
| Bias Network Stabilization | Temperature-Compensated Reference |
Use Scenario: Setting quiescent current in Class AB audio amplifier output stage. IC Role / Device Role / Timing Role: Zener establishing stable bias voltage for transistor base drive networks. Use Value: Maintains consistent bias point over -65°C to +150°C, minimizing thermal drift in high-reliability amplifiers. | Use Scenario: Paired with complementary diode in temperature-stable reference string for precision ADCs. IC Role / Device Role / Timing Role: One element of two-diode stack where 1N4755APE3/TR8 contributes known VZ tempco. Use Value: Predictable 43 V Zener voltage with documented tempco curve (Fig. 3) enables calibrated compensation. |
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 e3 RoHS suffix; Sn/Pb terminations instead of matte-tin | Not suitable for lead-free assembly; same electrical specs and DO-41 package | Select only for legacy Sn/Pb processes requiring JEDEC-registered non-RoHS variant |
| MMBZ5265BS | SOT-23 surface-mount package; 43 V ±5%, 225 mW rating, 20 Ω ZZT | Lower power handling; requires PCB redesign for SMT placement and thermal relief | Choose for space-constrained boards where 1W dissipation is not required and SMT is mandatory |
Compared with 1N4755A (Sn/Pb) and MMBZ5265BS (SOT-23), the 1N4755APE3/TR8 uniquely combines full 1W power capability, RoHS compliance, axial-leaded DO-41 mounting flexibility, and JEDEC-standardized specifications-making it optimal for through-hole industrial power supplies and ruggedized protection circuits.
Availability
1N4755APE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and analog bias networks requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4755APE3/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 RF solutions for aerospace, defense, and industrial markets.
The 1N47xxAP series was designed specifically for robust, standardized Zener regulation in harsh-environment power systems-emphasizing JEDEC registration, extended temperature operation, and military-grade screening options.
FAQ
What is the Zener voltage tolerance for 1N4755APE3/TR8?
The 1N4755APE3/TR8 has a nominal Zener voltage of 43 V with a tolerance of ±5%, as indicated by the "A" suffix in the part number per Microsemi's documentation. This tolerance applies at 6.0 mA test current and 25°C lead temperature. The "e3" suffix confirms RoHS compliance but does not affect voltage tolerance.
Can 1N4755APE3/TR8 be used in surface-mount designs?
No-1N4755APE3/TR8 is packaged in the axial-leaded DO-41 (JEDEC DO-204AL) case and is intended for through-hole mounting. For surface-mount equivalents, Microsemi offers the SMAJ4755A and MLL4755A series; however, those parts differ in power rating, thermal performance, and footprint, and are not drop-in replacements for 1N4755APE3/TR8.
What is the maximum surge current rating for 1N4755APE3/TR8?
The 1N4755APE3/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 supports transient suppression in DC power rails where short-duration overvoltages may occur, such as in motor drive or relay-switching environments.
Does 1N4755APE3/TR8 require moisture preconditioning before reflow?
No-1N4755APE3/TR8 is classified as Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it is not moisture-sensitive and requires no dry pack, baking, or special handling prior to reflow soldering. This simplifies manufacturing flow and eliminates risk of popcorning during assembly.
How does the thermal resistance of 1N4755APE3/TR8 impact PCB layout?
The 1N4755APE3/TR8 has a junction-to-lead thermal resistance of 45°C/W at 3/8" lead length, meaning effective heat removal depends on lead length and copper pour area. For reliable 1W operation, maintain ≥3/8" lead length from body and use ≥4 mm² copper pads with 1 mm track width and 25 mm length to achieve the specified 105°C/W junction-to-ambient rating on FR4.
1N4755APE3/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:
- ±5%
- 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)
1N4755APE3/TR8 FAQ
1.How can I place an order for 1N4755APE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4755APE3/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 1N4755APE3/TR8 reliable?
The price and inventory of 1N4755APE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4755APE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4755APE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4755APE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4755APE3/TR8?
1N4755APE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4755APE3/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 1N4755APE3/TR8?
For technical support, including 1N4755APE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4755APE3/TR8 requirements.
6.How does Aetrix verify that 1N4755APE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4755APE3/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 1N4755APE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4755APE3/TR8?
All 1N4755APE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4755APE3/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 1N4755APE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4755APE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4755APE3/TR8 Tags
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
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