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Microchip Technology 1PMT5943E3/TR13
- Part No.:
- 1PMT5943E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5943E3/TR13.pdf
- Description:
- DIODE ZENER 56V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,364
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Product details
Overview
1PMT5943E3/TR13 from Microsemi is a 56 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 dynamic impedance of 86 Ω at 6.7 mA test current, and ESD rating >16 kV HBM - used for precision voltage regulation and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1PMT5943E3/TR13 datasheet, 1PMT5943E3/TR13 pinout, 1PMT5943E3/TR13 application, or 1PMT5943E3/TR13 equivalent, key selection criteria include zener voltage tolerance, thermal resistance (30°C/W junction-to-TAB), reverse leakage (<1 µA at 42.6 V), knee current (0.25 mA), and compatibility with EIA-481 tape-and-reel automated assembly.
Technical Context
This Zener diode operates as a two-terminal voltage reference device, with cathode designated by TAB 1 and anode connected to the molded body. Its Powermite® package integrates a full metallic bottom for flux-free soldering and locking tabs that serve as integral heat sinks, enabling reliable thermal transfer to PCB copper.
The device is characterized at TL = 30°C with IZT = 6.7 mA, VZ = 56 V, ZZT = 86 Ω, and IR ≤ 1 µA at VR = 42.6 V. Junction-to-TAB thermal resistance is 30°C/W, supporting stable regulation under sustained 3.0 W dissipation when TAB 1 is maintained at ≤60°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 56 V ±5% at IZT = 6.7 mA - defines nominal regulation point with tight production control |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - maximum continuous DC power handling with defined thermal boundary |
| Dynamic Impedance | 86 Ω at 6.7 mA - low AC impedance ensures stable output voltage under small-signal load variation |
| Knee Current | 0.25 mA - minimum current required to enter regulated region with acceptable voltage deviation |
| Reverse Leakage | ≤1 µA at 42.6 V - guarantees minimal standby current in high-impedance bias networks |
| Thermal Resistance | 30°C/W junction-to-TAB - enables thermal design using TAB 1 as primary heat path to PCB |
| ESD Rating | >16 kV per HBM - supports robust handling in automated SMT lines without additional protection |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral heat-sink locking tabs; cathode designated by TAB 1; mounting position unrestricted; weight ≈0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary cathode terminal and thermal interface - must be connected to PCB copper pour for thermal management |
| Molded Body | Anode | Electrically active anode surface - forms second terminal via soldered contact to PCB pad |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables high-density PCB layout while delivering 3.0 W power handling traditionally found in larger DO-216 packages |
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term solder joint reliability |
| Integral heat-sink locking tabs | Provides mechanical anchoring and direct thermal conduction path from junction to PCB |
| ESD robustness >16 kV HBM | Reduces need for external ESD protection in board-level handling and automated insertion |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Circuit |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback network. IC Role / Device Role / Timing Role: Precision voltage reference establishing error amplifier threshold at secondary-side controller. Use Value: 56 V Zener voltage and 86 Ω dynamic impedance ensure stable loop gain and fast transient response under varying load conditions. | Use Scenario: Protecting downstream ICs from input surge events exceeding 42.6 V in industrial 24 V DC systems. IC Role / Device Role / Timing Role: Shunt clamping element diverting excess current when line voltage exceeds safe operating range. Use Value: 3.0 W power rating and 30°C/W thermal resistance allow sustained energy absorption without thermal runaway. |
| Programmable Voltage Reference | DC-DC Converter Trim Network |
Use Scenario: Setting adjustable output voltage in lab-grade bench power supplies with fine-tuned potentiometer-based dividers. IC Role / Device Role / Timing Role: Stable reference node defining upper rail of resistive divider feeding error amplifier. Use Value: ±5% tolerance and low 1 µA leakage at 42.6 V minimize drift and loading error in high-impedance divider configurations. | Use Scenario: Fine-tuning output voltage of fixed-output DC-DC modules using external resistor networks. IC Role / Device Role / Timing Role: Zener-based trim reference replacing internal bandgap, enabling ±10% output adjustment range. Use Value: 56 V breakdown supports wide trim range while maintaining regulation stability across temperature (-55°C to +150°C). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5943B | Same 56 V zener voltage, but in DO-41 axial package; higher thermal resistance (~65°C/W); no metallic bottom or locking tab | Requires through-hole mounting and manual assembly; unsuitable for high-density SMT or automated insertion | Select only if legacy through-hole design or thermal constraints permit larger footprint and lower power density |
| BZX84-C56 | SOT-23 package; 56 V ±5%; 300 mW rating; thermal resistance ~300°C/W; no integrated heat sink | Limited to low-power signal-level clamping; cannot sustain 3.0 W dissipation without derating or external heatsinking | Choose only for space-constrained signal-path protection where power stress is <100 mW |
Compared with 1N5943B and BZX84-C56, the 1PMT5943E3/TR13 uniquely delivers 3.0 W SMT power handling with integrated thermal management - making it the only option among the three suitable for high-reliability, high-power, automated production environments requiring flux-free assembly and robust ESD immunity.
Availability
1PMT5943E3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial overvoltage protection circuits, programmable voltage references, and DC-DC converter trim networks requiring stable component supply with consistent parametric performance and tape-and-reel delivery.
Supply support for 1PMT5943E3/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 radiation-hardened components for aerospace, defense, and industrial markets.
The Powermite® Zener diode product line was designed specifically to deliver high-power surface-mount voltage regulation with enhanced thermal and mechanical robustness for automated manufacturing in mission-critical power systems.
FAQ
What is the zener voltage tolerance for 1PMT5943E3/TR13?
The 1PMT5943E3/TR13 has a standard zener voltage tolerance of ±5% at 56 V, measured at IZT = 6.7 mA and TAB 1 temperature of 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D respectively, but the base part number 1PMT5943E3/TR13 specifies ±5%.
How is thermal management handled in the 1PMT5943E3/TR13 package?
The 1PMT5943E3/TR13 uses its metallic TAB 1 as the primary thermal path, with a specified junction-to-TAB thermal resistance of 30°C/W. The Powermite® package's locking tabs act as integral heat sinks, and the full metallic bottom ensures efficient conduction into the PCB copper, enabling 3.0 W dissipation when TAB 1 is held at ≤60°C.
Is 1PMT5943E3/TR13 compatible with automated SMT assembly?
Yes, the 1PMT5943E3/TR13 is explicitly designed for compatibility with automatic insertion equipment. Its Powermite® package features a unique locking tab geometry and full metallic bottom that prevent solder flux entrapment, ensuring reliable reflow soldering and high-yield placement in EIA-481 tape-and-reel format (13-inch reel: 12,000 pieces).
What is the maximum reverse leakage current for 1PMT5943E3/TR13?
The maximum reverse leakage current for 1PMT5943E3/TR13 is 1 µA at a reverse voltage of 42.6 V (75% of nominal 56 V), tested at TL = 30°C. This low leakage supports high-impedance bias networks and minimizes standby power loss in precision regulation circuits.
Does 1PMT5943E3/TR13 meet any ESD standards?
Yes, the 1PMT5943E3/TR13 is rated for >16 kV per the Human Body Model (HBM) ESD standard. This level of robustness allows safe handling in automated SMT lines and eliminates the need for additional on-board ESD protection in many industrial and power supply applications.
1PMT5943E3/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):
- 56 V
- Tolerance:
- ±20%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 86 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 42.6 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
1PMT5943E3/TR13 FAQ
1.How can I place an order for 1PMT5943E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5943E3/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 1PMT5943E3/TR13 reliable?
The price and inventory of 1PMT5943E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5943E3/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5943E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5943E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5943E3/TR13?
1PMT5943E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5943E3/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 1PMT5943E3/TR13?
For technical support, including 1PMT5943E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5943E3/TR13 requirements.
6.How does Aetrix verify that 1PMT5943E3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5943E3/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 1PMT5943E3/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5943E3/TR13?
All 1PMT5943E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5943E3/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 1PMT5943E3/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5943E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5943E3/TR13 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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