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Microchip Technology 1N4754P/TR8
- Part No.:
- 1N4754P/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4754P/TR8.pdf
- Description:
- DIODE ZENER 39V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,043
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Product details
Overview
1N4754P/TR8 from Microsemi is a 1.0 W silicon Zener diode with nominal zener voltage of 39 V, ±5% tolerance (A suffix), DO-41 plastic package, and 6.5 mA test current. It provides stable voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation across industrial temperature range.
For engineers reviewing the 1N4754P/TR8 datasheet, 1N4754P/TR8 pinout, 1N4754P/TR8 application, or 1N4754P/TR8 equivalent, key selection criteria include zener voltage accuracy, dynamic impedance at test current, maximum regulator current (115 mA at TA = 50°C), thermal resistance (45°C/W junction-to-lead), and RoHS-compliant tape-and-reel packaging (TR8).
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain a stable reference voltage under varying load and temperature conditions. Its 39 V nominal zener voltage exhibits a positive temperature coefficient above ~5 V, with typical tempco near +5.5 mV/°C per Figure 3 of the datasheet.
Designed for axial-lead through-hole mounting, it delivers 1.0 W steady-state power dissipation at lead temperature <105°C (3/8" from body) or ambient <45°C on FR4 board. It features moisture sensitivity level 1 (no dry pack required) and meets MIL-STD-750 ESD robustness requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V ±5% at IZT = 6.5 mA - defines regulated output voltage in shunt regulator designs |
| Power Dissipation | 1.0 W at TL < 105°C - sets maximum continuous power handling with proper lead heatsinking |
| Dynamic Impedance | 23 Ω at IZT = 6.5 mA - determines output voltage variation under load current changes |
| Max Regulator Current | 115 mA at TA = 50°C - limits usable current range before thermal derating applies |
| Thermal Resistance | 45°C/W junction-to-lead - informs heatsink design when leads serve as primary thermal path |
| Reverse Leakage | 5 μA max at VR = 29.7 V - ensures low standby power loss below regulation threshold |
| Forward Voltage | 1.2 V max at IF = 200 mA - relevant for polarity-check or forward-bias protection use cases |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead package with cathode indicated by color band; banded end is cathode (positive terminal during Zener operation). Leads are tin-lead or RoHS-compliant matte tin, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded lead | Connected to lower-potential node; carries reverse leakage current when unregulated |
| Cathode | Banded lead | Connected to higher-potential node; sinks regulation current to maintain 39 V reference |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered construction | Ensures mechanical and electrical interchangeability with legacy 1N47xxA-series Zeners |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and bake-out prior to PCB assembly |
| RoHS-compliant "e3" option | Available with annealed matte-tin plating for lead-free soldering compatibility |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - no special handling needed in production |
| Tape-and-reel packaging | TR8 suffix denotes EIA-296 standard reel - supports automated SMT placement of axial parts via carrier tape |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Used in TL431-based or discrete op-amp feedback networks to regulate 39 V output rails. IC Role / Device Role / Timing Role: Zener reference element setting error amplifier trip point. Use Value: 39 V ±5% tolerance and 23 Ω dynamic impedance ensure tight output voltage control under line/load transients. | Use Scenario: Placed across DC bus or IC supply rail to clamp transient spikes above 39 V. IC Role / Device Role / Timing Role: Shunt protection device diverting surge current away from sensitive loads. Use Value: 115 mA max regulator current and 1.0 W power rating enable reliable clamping of moderate-energy transients. |
| Voltage Reference Generator | Industrial Sensor Excitation |
Use Scenario: Provides stable 39 V bias for precision analog front-ends or ADC reference buffers. IC Role / Device Role / Timing Role: Primary voltage reference source in low-drift measurement circuits. Use Value: Low 5 μA reverse leakage at 29.7 V and minimal knee impedance (23 Ω) reduce reference error contribution. | Use Scenario: Supplies constant-voltage excitation to resistive bridge sensors in harsh environments. IC Role / Device Role / Timing Role: Stable excitation source maintaining sensor linearity across temperature. Use Value: -65°C to +150°C operating range and 45°C/W thermal resistance support operation in extended-temperature industrial enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4754A | No TR8 tape-and-reel packaging; bulk or ammo-pack only | Same electrical specs but unsuitable for automated pick-and-place | Select 1N4754P/TR8 when requiring EIA-296 compliant reel delivery for high-volume assembly |
| MMBZ5267BS-7-F | SOT-23 surface-mount package; 39 V, 225 mW, ±5%; higher ZZT = 70 Ω | Lower power, smaller footprint - suited for space-constrained PCBs where 1.0 W dissipation is unnecessary | Choose MMBZ5267BS-7-F only if board area is critical and thermal budget allows reduced power rating |
Compared with 1N4754A and MMBZ5267BS-7-F, the 1N4754P/TR8 uniquely combines full 1.0 W power capability, DO-41 mechanical robustness, and factory-standard tape-and-reel packaging - making it optimal for industrial power supplies requiring long-term reliability and automated manufacturing support.
Availability
1N4754P/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and precision voltage reference designs requiring stable component supply and consistent JEDEC-compliant performance.
Supply support for 1N4754P/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N4754P/TR8 belongs to Microsemi's legacy 1N47xxAP Zener diode family, engineered for ruggedized voltage regulation in mission-critical power systems where stability, temperature resilience, and long-term parametric consistency are essential.
FAQ
What is the zener voltage tolerance of the 1N4754P/TR8?
The 1N4754P/TR8 has a nominal zener voltage of 39 V with ±5% tolerance, as indicated by the "A" suffix in its part number per JEDEC registration. This tolerance applies at 6.5 mA test current and 25°C lead temperature. The "P" denotes plastic DO-41 packaging, and "TR8" specifies EIA-296 tape-and-reel format. Full validation is provided in Microsemi's 1N4728AP–1N4764AP datasheet Rev C.
Does the 1N4754P/TR8 require dry packing before PCB assembly?
No, the 1N4754P/TR8 does not require dry packing. It is rated Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored and assembled without baking or humidity-controlled handling. This simplifies manufacturing flow and reduces cost for high-volume production using the 1N4754P/TR8 in industrial applications.
What is the maximum regulator current for the 1N4754P/TR8 at 50°C ambient?
The maximum regulator current (IZM) for the 1N4754P/TR8 is 115 mA at TA = 50°C, as specified in the Electrical Characteristics table. This value assumes mounting on FR4 board with defined copper pad geometry (4 mm²) and accounts for thermal derating. Exceeding this current risks exceeding the 1.0 W power limit and potential thermal runaway.
Is the 1N4754P/TR8 RoHS compliant?
Yes, the 1N4754P/TR8 is RoHS compliant. Microsemi offers this part with an "e3" suffix (e.g., 1N4754P/TR8e3) indicating annealed matte-tin plating and full compliance with EU RoHS Directive 2011/65/EU. Standard 1N4754P/TR8 units shipped by Aetrix meet RoHS requirements unless otherwise specified in order documentation.
What is the thermal resistance junction-to-lead for the 1N4754P/TR8?
The thermal resistance junction-to-lead for the 1N4754P/TR8 is 45°C/W at 3/8 inch (10 mm) lead length from the body, per Microsemi's datasheet. This parameter is critical for calculating junction temperature rise under load and confirms suitability for lead-heatsinked applications where board-level convection cooling is limited.
1N4754P/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):
- 39 V
- Tolerance:
- ±10%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 29.7 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)
1N4754P/TR8 FAQ
1.How can I place an order for 1N4754P/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4754P/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 1N4754P/TR8 reliable?
The price and inventory of 1N4754P/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4754P/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4754P/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4754P/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4754P/TR8?
1N4754P/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4754P/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 1N4754P/TR8?
For technical support, including 1N4754P/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4754P/TR8 requirements.
6.How does Aetrix verify that 1N4754P/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4754P/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 1N4754P/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4754P/TR8?
All 1N4754P/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4754P/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 1N4754P/TR8 part is unused and in its original packaging.
Return procedure for 1N4754P/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4754P/TR8 Tags
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