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Microchip Technology 1PMT5940CE3/TR13
- Part No.:
- 1PMT5940CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5940CE3/TR13.pdf
- Description:
- DIODE ZENER 43V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,772
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Product details
Overview
1PMT5940CE3/TR13 from Microsemi is a 43 V, ±5% tolerance surface-mount Zener diode in the Powermite® package, rated for 3.0 W DC power dissipation at TAB 1 = 60°C, with 53 Ω dynamic impedance at 8.7 mA test current and 950 µA max reverse leakage at 32.7 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails and regulator feedback networks.
For engineers reviewing the 1PMT5940CE3/TR13 datasheet, 1PMT5940CE3/TR13 pinout, 1PMT5940CE3/TR13 application, or 1PMT5940CE3/TR13 equivalent, key selection criteria include zener voltage tolerance (±5%), thermal resistance (30°C/W junction-to-TAB), ESD rating (>16 kV HBM), low knee impedance (≤400 Ω), and compatibility with automated SMT assembly per EIA-481 tape-and-reel packaging.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage regulation across varying load currents. Its Powermite® package integrates a full metallic bottom and locking tab that functions as both mechanical anchor and thermal path to PCB copper, enabling efficient heat transfer from junction to TAB 1.
The device exhibits tight voltage control with 43 V nominal zener voltage measured at 8.7 mA (IZT), 53 Ω dynamic impedance (ZZT), and 950 µA maximum reverse leakage (IR) at 32.7 V (VR). Junction-to-TAB thermal resistance is specified at 30°C/W, supporting reliable operation up to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 43 V ±5% at IZT = 8.7 mA - defines regulated output voltage in shunt regulator or reference circuits |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - sets maximum continuous power handling under thermal constraint |
| Dynamic Impedance (ZZT) | 53 Ω at IZT = 8.7 mA - determines voltage regulation sensitivity to current changes |
| Reverse Leakage (IR) | ≤950 µA at VR = 32.7 V - impacts quiescent current loss in high-impedance bias networks |
| Thermal Resistance | 30°C/W junction-to-TAB - enables thermal design using TAB 1 as primary heat sink interface |
| ESD Rating | >16 kV per Human Body Model - ensures robustness during handling and board assembly |
| Knee Impedance (ZZK) | ≤400 Ω at IZK = 0.25 mA - supports stable regulation even near breakdown threshold |
Pinout & Package
Package: Powermite® surface-mount package (DO-216 compatible outline), molded plastic body with full metallic bottom and integral locking tab acting as cathode terminal and thermal interface. Cathode designated by TAB 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary current return path and thermal conduction interface to PCB; must be soldered to copper pour for thermal management |
| Lead 2 | Anode | Input terminal for reverse-bias connection; electrically isolated from TAB 1 |
Key Features
| Feature | Design Value |
|---|---|
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving solder joint reliability and process yield |
| Integral locking tab | Acts as mechanical anchor and heatsink, reducing thermal resistance by direct metal-to-PCB contact |
| EIA-481 tape-and-reel packaging | Enables direct use with automated pick-and-place equipment without manual handling or repackaging |
| Low reverse leakage | 950 µA max at 32.7 V supports low-power biasing in battery-operated or energy-sensitive systems |
Applications
| DC Power Rail Clamping | Feedback Reference for SMPS |
|---|---|
Use Scenario: Protection of 3.3 V or 5 V logic rails against transient overvoltage events such as ESD or inductive switching spikes. IC Role / Device Role / Timing Role: Shunt clamping device that conducts excess current above 43 V to ground, limiting voltage excursion. Use Value: Prevents latch-up or damage to downstream ICs by clamping transients within safe operating limits defined by its 43 V zener voltage and 3.0 W power rating. | Use Scenario: Providing stable voltage reference for optocoupler-based feedback loop in isolated flyback converters. IC Role / Device Role / Timing Role: Precision voltage reference source setting secondary-side regulation threshold. Use Value: Enables accurate output voltage regulation with ±5% tolerance and low dynamic impedance (53 Ω), minimizing output drift under load variation. |
| Industrial Sensor Biasing | Programmable Threshold Detector |
Use Scenario: Supplying stable excitation voltage to resistive bridge sensors in harsh environments (−55°C to +150°C). IC Role / Device Role / Timing Role: Low-drift voltage reference for analog front-end conditioning circuitry. Use Value: Maintains accuracy across wide temperature range due to −55°C to +150°C junction/storage rating and low thermal resistance (30°C/W). | Use Scenario: Setting trip point for comparator-based overvoltage detection in battery management systems. IC Role / Device Role / Timing Role: Fixed reference input to comparator, triggering fault response when input exceeds 43 V. Use Value: Provides repeatable, ESD-hardened (≥16 kV HBM) threshold with minimal leakage-induced offset error (≤950 µA at 32.7 V). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4749A | Same 43 V nominal voltage but TO-204AA (DO-41) through-hole package; 1 W rating; higher ZZT (70 Ω) | Requires PCB through-hole mounting; unsuitable for high-density SMT layouts or automated assembly | Select 1PMT5940CE3/TR13 for SMT production, thermal performance, or space-constrained designs |
| BZX84-C43 | SOT-23 package; 300 mW rating; ±5% tolerance; 90 Ω ZZT at 5 mA | Limited to low-power signal-level referencing; cannot sustain 3.0 W dissipation or high-current clamping | Select 1PMT5940CE3/TR13 where >1 W clamping energy, thermal robustness, or industrial-grade ESD immunity is required |
Compared with 1N4749A and BZX84-C43, the 1PMT5940CE3/TR13 delivers superior thermal management via its metallic-tab Powermite® package, higher power capability (3.0 W vs. 1 W or 0.3 W), and industry-leading ESD hardness (>16 kV HBM), making it suitable for ruggedized power rail protection and industrial feedback applications.
Availability
1PMT5940CE3/TR13 is available at Aetrix Electronics and suitable for DC power rail clamping, SMPS feedback referencing, industrial sensor biasing, and programmable threshold detection requiring stable component supply and long-term manufacturability.
Supply support for 1PMT5940CE3/TR13 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, industrial, and communications markets.
The Powermite® Zener diode product line was designed for high-power-density surface-mount voltage regulation and transient suppression in mission-critical power systems where thermal performance, mechanical robustness, and ESD resilience are essential.
FAQ
What is the zener voltage tolerance for 1PMT5940CE3/TR13?
The 1PMT5940CE3/TR13 has a standard zener voltage tolerance of ±5% at 43 V, measured at 8.7 mA test current with TAB 1 held at 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D respectively, but the CE3 variant specifies ±5%. This tolerance directly affects regulation accuracy in reference and clamping applications.
How is thermal management handled in the 1PMT5940CE3/TR13 package?
The 1PMT5940CE3/TR13 uses the Powermite® package with a full metallic bottom and integral locking tab (TAB 1) that serves as both cathode terminal and primary thermal path. Its specified junction-to-TAB thermal resistance is 30°C/W, enabling effective heat transfer to PCB copper when TAB 1 is soldered to an adequate thermal pad.
What is the maximum reverse leakage current for 1PMT5940CE3/TR13?
The 1PMT5940CE3/TR13 has a maximum reverse leakage current (IR) of 950 µA at a reverse voltage (VR) of 32.7 V, measured at TL = 30°C. This low leakage supports stable operation in high-impedance bias networks and minimizes quiescent power loss in battery-powered or energy-efficient systems.
Is 1PMT5940CE3/TR13 compatible with automated SMT assembly processes?
Yes, the 1PMT5940CE3/TR13 is supplied in EIA-481 standard tape-and-reel format (7-inch reel: 3,000 pieces; 13-inch reel: 12,000 pieces) and features a Powermite® package geometry optimized for pick-and-place equipment. Its locking tab and flat bottom ensure stable orientation and reliable placement during high-speed SMT assembly.
What is the ESD rating of 1PMT5940CE3/TR13?
The 1PMT5940CE3/TR13 is rated for >16 kV per Human Body Model (HBM), as confirmed in the official Microsemi datasheet MSC0995. This high ESD immunity protects the device during handling, board assembly, and end-use in electrically noisy environments such as industrial controls or automotive subsystems.
1PMT5940CE3/TR13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-216AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 43 V
- Tolerance:
- ±2%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 53 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 32.7 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-216AA
1PMT5940CE3/TR13 FAQ
1.How can I place an order for 1PMT5940CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5940CE3/TR13 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 1PMT5940CE3/TR13 reliable?
The price and inventory of 1PMT5940CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5940CE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5940CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5940CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5940CE3/TR13?
1PMT5940CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5940CE3/TR13 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 1PMT5940CE3/TR13?
For technical support, including 1PMT5940CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5940CE3/TR13 requirements.
6.How does Aetrix verify that 1PMT5940CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5940CE3/TR13 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 1PMT5940CE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5940CE3/TR13?
All 1PMT5940CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5940CE3/TR13, 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 1PMT5940CE3/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5940CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5940CE3/TR13 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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