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Microchip Technology 1PMT5943C/TR13
- Part No.:
- 1PMT5943C/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5943C/TR13.pdf
- Description:
- DIODE ZENER 56V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,686
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Product details
Overview
1PMT5943C/TR13 from Microsemi is a 56 V ±2% Zener diode in Powermite® surface-mount 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 reverse leakage ≤1 µA at 42.6 V, used for precision voltage regulation and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1PMT5943C/TR13 datasheet, 1PMT5943C/TR13 pinout, 1PMT5943C/TR13 application, or 1PMT5943C/TR13 equivalent, key selection criteria include zener tolerance (±2% suffix C), thermal resistance (30°C/W junction-to-TAB1), ESD rating (>16 kV HBM), low knee impedance (≤1300 Ω), 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, requiring no external biasing circuitry. Its full metallic bottom and integral heat sink locking tab enable direct thermal conduction to PCB copper, supporting stable regulation under transient load conditions.
The device exhibits tight voltage control across temperature (−55°C to +150°C junction range) and maintains low reverse leakage (≤1 µA at VR = 42.6 V), enabling reliable clamping in low-power sensing and feedback paths where precision and stability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 56 V ±2% (suffix C), measured at 6.7 mA, ensuring accurate reference in feedback networks |
| Power Dissipation | 3.0 W at TAB 1 = 60°C, enabling robust operation in compact power supplies without forced cooling |
| Dynamic Impedance | 86 Ω at IZT = 6.7 mA, minimizing output voltage variation under load current changes |
| Reverse Leakage | ≤1 µA at VR = 42.6 V, reducing standby power loss in high-impedance bias circuits |
| Thermal Resistance | 30°C/W junction-to-TAB1, allowing predictable thermal rise during continuous regulation |
| ESD Rating | >16 kV per Human Body Model, supporting handling and assembly in standard SMT lines without special ESD controls |
| Junction Temp Range | −55°C to +150°C, qualifying for industrial and automotive under-hood applications |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral heat sink locking tab; cathode identified by TAB 1; DO-216 outline; weight ≈ 0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary thermal path and electrical cathode connection; must be soldered to copper pour for thermal management |
| Lead 2 | Anode | Standard anode terminal; mounted on PCB pad with minimal trace length to reduce parasitic inductance |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow while delivering 3.0 W power handling in footprint smaller than DO-41 |
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term reliability and solder joint integrity |
| Integral heat sink locking tab | Provides mechanical anchoring and direct thermal conduction path to PCB, reducing junction temperature rise by ~30°C/W |
| ±2% zener tolerance (suffix C) | Supports tighter regulation in closed-loop power supplies without post-manufacture trimming |
| ESD >16 kV HBM | Allows safe handling and board-level integration without additional ESD protection components |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp in Telecom Line Cards |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Precision voltage reference and error-sensing element in secondary-side regulation. Use Value: ±2% tolerance ensures ±1.5% output accuracy; 86 Ω dynamic impedance minimizes load-induced drift under dynamic line/load transients. |
Use Scenario: Protecting downstream PHY ICs from lightning-induced surges on 48 V DC distribution rails. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting rail voltage to 56 V before damage threshold of protected ICs. Use Value: 3.0 W power rating sustains 100 ms surge events; >16 kV HBM withstands ESD events during hot-plug insertion. |
| Industrial Sensor Signal Conditioning | Programmable Logic Controller (PLC) Input Protection |
Use Scenario: Biasing and protecting analog front-end op-amps in 4–20 mA current loop receivers. IC Role / Device Role / Timing Role: Stable reference for current-to-voltage conversion and overvoltage guardrail. Use Value: Low 1 µA leakage at 42.6 V prevents signal offset errors; −55°C to +150°C range supports wide ambient operation. |
Use Scenario: Clamping transient spikes induced by inductive load switching on 24 V digital input channels. IC Role / Device Role / Timing Role: Primary overvoltage suppression device placed directly at connector entry point. Use Value: Metallic bottom and locking tab ensure repeatable thermal performance across thousands of cycles; DO-216 footprint fits dense I/O module layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5943C | DO-41 through-hole package; same 56 V ±2%, but higher thermal resistance (~65°C/W) and no metallic heat sink tab | Requires manual or wave soldering; unsuitable for high-density SMT designs or thermally constrained layouts | Select when legacy through-hole assembly is required and thermal margin exceeds 30°C/W |
| BZX84-C56 | SOT-23 package; 56 V ±5%; 300 mW rating; 150 Ω dynamic impedance; no specified HBM ESD rating | Limited to low-power signal-level clamping; cannot sustain 3.0 W surges or replace 1PMT5943C/TR13 in power rail protection | Select only for space-constrained signal-path references where power dissipation < 0.3 W |
Compared with 1N5943C and BZX84-C56, the 1PMT5943C/TR13 uniquely combines SMT manufacturability, 3.0 W power handling, ±2% tolerance, and >16 kV ESD in a single DO-216 package-enabling direct replacement in high-reliability power regulation where thermal and ESD robustness are non-negotiable.
Availability
1PMT5943C/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, telecom line card protection, industrial sensor conditioning, and PLC input protection requiring stable component supply and consistent parametric performance across production lots.
Supply support for 1PMT5943C/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 engineered for high-power density voltage regulation in space-constrained, thermally demanding environments-delivering discrete 3.0 W capability in surface-mount form without compromising precision or ruggedness.
FAQ
What is the zener voltage tolerance for 1PMT5943C/TR13?
The "C" suffix in 1PMT5943C/TR13 denotes a ±2% zener voltage tolerance at 56 V nominal, verified per Microsemi's MSC0995 specification. This tighter tolerance enables higher accuracy in feedback loops compared to standard ±5% parts like 1PMT5943B/TR13, and is confirmed in the Electrical Characteristics table where VZ = 56 V with IZT = 6.7 mA at TL = 30°C.
How is thermal management handled in the 1PMT5943C/TR13 package?
The 1PMT5943C/TR13 uses a Powermite® package with a full metallic bottom and integral heat sink locking tab that conducts heat directly from the silicon junction to the PCB copper. Its specified thermal resistance is 30°C/W junction-to-TAB1, meaning a 3.0 W dissipation raises junction temperature by 90°C above TAB1 temperature-so mounting TAB1 to ≥1 sq-in. of 2-oz copper is essential for reliable operation.
Is 1PMT5943C/TR13 compatible with automated SMT assembly processes?
Yes, 1PMT5943C/TR13 is designed for compatibility with automatic insertion equipment and standard reflow soldering. It ships in EIA-481-compliant tape-and-reel format (13-inch reel, 12,000 pieces), and its Powermite® package geometry-including the locking tab and flat metallic base-ensures stable pick-and-place and prevents tombstoning during reflow.
What is the maximum reverse leakage current for 1PMT5943C/TR13?
The maximum reverse leakage current for 1PMT5943C/TR13 is 1 µA at VR = 42.6 V, as specified in the Electrical Characteristics table. This low leakage ensures minimal error contribution in high-impedance reference or bias networks, and remains valid across the full operating temperature range of −55°C to +150°C junction temperature.
Does 1PMT5943C/TR13 have ESD protection built-in?
Yes, 1PMT5943C/TR13 has an ESD rating exceeding 16 kV per the Human Body Model (HBM), as stated in the FEATURES section of the MSC0995 datasheet. This intrinsic robustness eliminates the need for external ESD suppressors in most board-level applications and supports safe handling during standard SMT manufacturing without dedicated ESD workstations.
1PMT5943C/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:
- ±2%
- 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
1PMT5943C/TR13 FAQ
1.How can I place an order for 1PMT5943C/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5943C/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 1PMT5943C/TR13 reliable?
The price and inventory of 1PMT5943C/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5943C/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5943C/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5943C/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5943C/TR13?
1PMT5943C/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5943C/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 1PMT5943C/TR13?
For technical support, including 1PMT5943C/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5943C/TR13 requirements.
6.How does Aetrix verify that 1PMT5943C/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5943C/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 1PMT5943C/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5943C/TR13?
All 1PMT5943C/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5943C/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 1PMT5943C/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5943C/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5943C/TR13 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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Diodes Incorporated
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BZX84C3V3LT1G
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