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Microchip Technology 1N4754P/TR12
- Part No.:
- 1N4754P/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4754P/TR12.pdf
- Description:
- DIODE ZENER 39V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,985
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Product details
Overview
1N4754P/TR12 from Microsemi is a 1.0 W axial-lead silicon Zener diode with nominal Zener voltage 39 V, ±5% tolerance (A-suffix), 6.5 mA test current (IZT), 60 Ω dynamic impedance (ZZT), and 5 μA maximum reverse leakage at 29.7 V. It regulates voltage in power supply reference and overvoltage protection circuits across -65°C to +150°C.
For engineers reviewing the 1N4754P/TR12 datasheet, 1N4754P/TR12 pinout, 1N4754P/TR12 application, or 1N4754P/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (45°C/W junction-to-lead), surge current rating (1000 mA), RoHS-compliant "e3" plating option, and DO-41 package compatibility with standard axial-lead PCB layouts.
Technical Context
This device operates in reverse breakdown to maintain stable voltage under varying load and temperature conditions. Its 39 V Zener voltage is specified at 6.5 mA IZT with 60 Ω dynamic impedance, ensuring predictable regulation slope and low output variation across its 1.0 W power envelope.
Designed for through-hole mounting, the 1N4754P/TR12 features a moisture-sensitive Level 1 classification per IPC/JEDEC J-STD-020B, void-free epoxy case rated UL94V-0, and cathode band polarity marking. Thermal performance is defined at 3/8" (10 mm) lead length from body (45°C/W) or on FR4 board (105°C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Vz) | 39 V ±5% at 6.5 mA - defines precise regulation point for reference design |
| Power Dissipation | 1.0 W at TL < 105°C - sets maximum continuous thermal load at lead |
| Dynamic Impedance (ZZT) | 60 Ω at IZT - determines output voltage deviation under load transients |
| Reverse Leakage (IR) | 5 μA max at 29.7 V - ensures minimal standby current in shunt regulator |
| Surge Current (ISM) | 1000 mA - supports transient overvoltage clamping without failure |
| Thermal Resistance | 45 °C/W junction-to-lead - enables thermal modeling for lead-length-dependent derating |
| Operating Temperature | -65°C to +150°C - validated for industrial and automotive under-hood environments |
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 | Ground-reference terminal | Connected to system ground or lower-potential node in shunt configuration |
| Cathode | Zener regulation terminal | Banded end; connected to input rail to clamp voltage at 39 V relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Fully compliant with JEDEC 1N47xxA series standards for interchangeability and testing |
| Plastic encapsulation (P-suffix) | Lower thermal resistance vs. glass-body variants-improves power handling in compact layouts |
| Moisture sensitivity Level 1 | No dry pack required-reduces handling cost and simplifies SMT line integration |
| RoHS-compliant "e3" option | Available with annealed matte-tin plating-meets global environmental compliance mandates |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020-enables robust handling in uncontrolled assembly environments |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stable 39 V reference in linear regulator feedback networks or ADC reference dividers. IC Role / Device Role / Timing Role: Shunt voltage reference providing precision bias point independent of input ripple. Use Value: 60 Ω dynamic impedance and ±5% Vz tolerance ensure <±0.5 V output variation across 1–10 mA operating range. | Use Scenario: Clamping transient surges on 36 V battery-fed industrial control inputs. IC Role / Device Role / Timing Role: Passive overvoltage limiter diverting excess energy to ground before downstream IC damage. Use Value: 1000 mA surge rating and 39 V clamping threshold protect 40 V-rated interface ICs during load-dump events. |
| Voltage Monitor Circuit | Signal-Level Shifter |
Use Scenario: Detecting undervoltage/overvoltage conditions in telecom power modules using comparator input thresholds. IC Role / Device Role / Timing Role: Precision Zener element setting trip voltage for window comparators. Use Value: Tight 5% tolerance and low tempco (≈+3.5 mV/°C near 39 V) minimize false triggers across -40°C to +85°C. | Use Scenario: Level-shifting 5 V logic signals to 39 V analog domain in PLC I/O isolation stages. IC Role / Device Role / Timing Role: Bidirectional clamping diode establishing fixed offset between signal domains. Use Value: 1.2 V forward drop at 200 mA enables clean high-side switching while maintaining reverse-blocking integrity. |
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 TR12 tape-and-reel packaging; bulk or ammo pack only | Lacks standardized reel delivery for automated placement | Select 1N4754P/TR12 when requiring EIA-296-compliant tape-and-reel for SMT line feed |
| MMBZ5265BLT1G | Surface-mount SOT-23 package; 39 V, 225 mW, 5% tolerance | Lower power rating and different thermal path-unsuitable for >225 mW continuous dissipation | Choose MMBZ5265BLT1G only for space-constrained PCBs where 1.0 W dissipation is not required |
Compared with 1N4754A and MMBZ5265BLT1G, the 1N4754P/TR12 uniquely combines 1.0 W power handling, DO-41 axial reliability, and EIA-296 tape-and-reel compatibility-making it optimal for high-current industrial references requiring automated assembly and thermal margin.
Availability
1N4754P/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, automotive battery monitoring systems, and telecom voltage supervision circuits requiring stable component supply and long-term obsolescence management.
Supply support for 1N4754P/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 series was designed specifically for ruggedized voltage regulation in harsh-environment power systems where stability, thermal resilience, and JEDEC-standard interchangeability are critical.
FAQ
What is the Zener voltage tolerance of the 1N4754P/TR12?
The 1N4754P/TR12 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 is measured at 6.5 mA test current and 25°C lead temperature, and applies across the full operating temperature range of -65°C to +150°C per Microsemi's published electrical characteristics table.
Does the 1N4754P/TR12 have RoHS-compliant plating?
Yes, the 1N4754P/TR12 is available with RoHS-compliant annealed matte-tin plating, designated by the "e3" suffix in the full orderable part number (e.g., 1N4754AP e3). The base part number 1N4754P/TR12 includes this RoHS-compliant finish unless otherwise specified, and meets solderability requirements per MIL-STD-750 Method 2026.
What is the maximum surge current rating for the 1N4754P/TR12?
The 1N4754P/TR12 has a maximum non-repetitive surge current (ISM) rating of 1000 mA, measured using a ½ sine-wave pulse of 1/120 second duration at 25°C ambient. This rating enables reliable transient clamping in automotive load-dump and industrial inductive-switching scenarios without degradation of Zener voltage or impedance.
How does the thermal resistance of the 1N4754P/TR12 affect PCB layout?
The 1N4754P/TR12 has a junction-to-lead thermal resistance of 45°C/W when measured at 3/8" (10 mm) lead length from body. To maintain safe operation at full 1.0 W dissipation, PCB traces must allow sufficient lead length or use thermal relief pads; on FR4 with 1 oz Cu, junction-to-ambient resistance rises to 105°C/W-requiring derating above 45°C ambient per the published power derating curve.
Is the 1N4754P/TR12 compatible with automated pick-and-place equipment?
Yes, the 1N4754P/TR12 is supplied in EIA-296 standard tape-and-reel format (TR12 designation), enabling direct feeding into automated assembly lines. Its DO-41 axial package is oriented consistently in the reel pocket, and the cathode band marking remains visible for optical verification-supporting high-yield placement in industrial and telecom manufacturing environments.
1N4754P/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):
- 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/TR12 FAQ
1.How can I place an order for 1N4754P/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4754P/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 1N4754P/TR12 reliable?
The price and inventory of 1N4754P/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4754P/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4754P/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4754P/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4754P/TR12?
1N4754P/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4754P/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 1N4754P/TR12?
For technical support, including 1N4754P/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4754P/TR12 requirements.
6.How does Aetrix verify that 1N4754P/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4754P/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 1N4754P/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4754P/TR12?
All 1N4754P/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4754P/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 1N4754P/TR12 part is unused and in its original packaging.
Return procedure for 1N4754P/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4754P/TR12 Tags
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