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Microchip Technology 1PMT5943C/TR7
- Part No.:
- 1PMT5943C/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5943C/TR7.pdf
- Description:
- DIODE ZENER 56V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,062
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Product details
Overview
1PMT5943C/TR7 from Microsemi is a 56 V, ±1% tolerance surface-mount Zener diode in the Powermite® package, rated for 3.0 W DC power dissipation at TAB 1 = 60°C, with 86 Ω dynamic impedance at 6.7 mA test current and 1300 Ω knee impedance at 0.25 mA, used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1PMT5943C/TR7 datasheet, 1PMT5943C/TR7 pinout, 1PMT5943C/TR7 application, or 1PMT5943C/TR7 equivalent, key selection criteria include tight voltage tolerance (±1%), low reverse leakage (<1 µA at 42.6 V), ESD robustness (>16 kV HBM), thermal resistance (30°C/W junction-to-TAB), and compatibility with automated SMT assembly per EIA-481 tape-and-reel packaging.
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 efficient thermal conduction to the PCB pad while eliminating solder flux entrapment during reflow.
The device exhibits stable Zener breakdown behavior across -55°C to +150°C junction temperature range, with specified parameters measured at TL = 30°C and validated under DC conditions with 20-second stabilization time after current application per Micro Note 202.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 56 V ±1% - precise regulation threshold for feedback or clamping at nominal operating current |
| Test Current | 6.7 mA - standardized bias point for measuring VZ and dynamic impedance |
| Dynamic Impedance | 86 Ω - low AC impedance ensures minimal output voltage variation under load transients |
| Knee Impedance | 1300 Ω - defines onset of stable Zener conduction at low current (0.25 mA) |
| Max Reverse Leakage | <1 µA at 42.6 V - guarantees low standby power loss in high-impedance sensing paths |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables compact board layout without external heatsinking in moderate-power designs |
| Thermal Resistance | 30°C/W junction-to-TAB - quantifies thermal path efficiency to PCB copper for reliability modeling |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral heat sink locking tab; cathode identified by TAB 1; compatible with EIA-481 tape-and-reel (7″ reel: 3,000 pcs).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat-sinking terminal and electrical cathode connection; must be soldered to thermal pad for rated power handling |
| Lead 2 | Anode | Standard anode connection; mounted opposite TAB 1 on DO-216 outline; no thermal function |
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 risk during assembly, improving long-term solder joint reliability |
| Integral heat sink locking tab | Provides mechanical anchoring and direct thermal path from junction to PCB copper, reducing thermal resistance to 30°C/W |
| ESD rating >16 kV HBM | Supports handling and assembly in standard manufacturing environments without additional ESD protection circuitry |
| ±1% Zener voltage tolerance (suffix C) | Reduces need for post-production trimming in precision reference applications such as ADC voltage references |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or forward converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Precision Zener reference establishing stable 56 V threshold for TL431-type shunt regulator control. Use Value: ±1% tolerance ensures <±0.56 V output deviation; 86 Ω dynamic impedance minimizes load-regulation error under transient steps. | Use Scenario: Clamping surge-induced overvoltage on 48 V DC bus lines in industrial motor drives. IC Role / Device Role / Timing Role: Two-terminal passive clamp absorbing transient energy above 56 V threshold before downstream MOSFETs fail. Use Value: 3.0 W rating sustains 100 ms surges up to 56 V × 53.6 mA; 1300 Ω knee impedance ensures sharp turn-on near rated voltage. |
| High-Voltage Sensor Reference | Programmable Logic Controller Input Protection |
Use Scenario: Providing stable reference for resistive divider networks measuring 0–100 V DC inputs in data acquisition modules. IC Role / Device Role / Timing Role: Low-drift voltage reference enabling accurate scaling of high-side sensed signals into ADC input range. Use Value: 30°C/W thermal resistance maintains <10 ppm/°C drift when mounted on 1-in² 2-oz copper; ±1% tolerance eliminates calibration per unit. | Use Scenario: Protecting digital input pins of PLC I/O cards against accidental 24–48 V miswiring or inductive kickback. IC Role / Device Role / Timing Role: Fast-acting crowbar element limiting input voltage to safe logic levels during fault events. Use Value: >16 kV HBM ESD rating prevents latch-up during field servicing; full metallic bottom ensures repeatable clamping performance across thermal cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF56A (ON Semiconductor) | 56 V, ±5%, 1.0 W, SOD-123FL package, 100 Ω Zzt, no metallic bottom | Lower power rating limits use to signal-level clamping; lacks integrated heat sink tab | Select when board space is constrained and power <1 W; not suitable for 3 W continuous regulation |
| BZX84-C56 (Diodes Inc.) | 56 V, ±5%, 300 mW, SOT-23 package, 110 Ω Zzt, plastic bottom | Insufficient power and thermal capability for sustained 3 W operation; higher thermal resistance (~250°C/W) | Acceptable only for low-duty-cycle transient suppression; requires derating above 70°C ambient |
Compared with SMF56A and BZX84-C56, the 1PMT5943C/TR7 delivers 3× higher power handling, 8× lower thermal resistance, and ±1% tolerance-making it uniquely suited for industrial-grade voltage regulation where stability, thermal margin, and precision are non-negotiable.
Availability
1PMT5943C/TR7 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial overvoltage protection systems, high-voltage sensor references, and programmable logic controller input protection requiring stable component supply and long-term manufacturability.
Supply support for 1PMT5943C/TR7 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 surface-mount voltage regulation in harsh-environment power systems where thermal performance, ESD immunity, and long-term parametric stability are critical.
FAQ
What is the Zener voltage tolerance for 1PMT5943C/TR7?
The "C" suffix in 1PMT5943C/TR7 denotes ±1% Zener voltage tolerance at 56 V, verified per Microsemi's test conditions (IZT = 6.7 mA, TL = 30°C). This tighter tolerance reduces system-level calibration burden compared to standard ±5% versions like 1PMT5943B/TR7 and supports precision feedback applications without trimming.
How is thermal management implemented in the 1PMT5943C/TR7 package?
The 1PMT5943C/TR7 uses a Powermite® package with a full metallic bottom and integral heat sink locking tab (TAB 1) that serves as both cathode and primary thermal path. Its 30°C/W junction-to-TAB thermal resistance requires direct soldering to a minimum 1-in² 2-oz copper pad for full 3.0 W rating-no external heatsink needed under controlled board layout.
Is 1PMT5943C/TR7 compatible with automated SMT assembly processes?
Yes, 1PMT5943C/TR7 is fully compatible with automated insertion and reflow soldering. Its Powermite® package features symmetric lead geometry and a flat metallic bottom designed for stable placement and uniform wetting. It ships in EIA-481-compliant tape-and-reel format (7″ reel: 3,000 pcs), supporting high-throughput pick-and-place equipment without tombstoning or alignment issues.
What is the maximum reverse leakage current for 1PMT5943C/TR7 at rated voltage?
At VR = 42.6 V (76% of nominal 56 V Zener voltage), the 1PMT5943C/TR7 exhibits ≤1 µA reverse leakage current, measured at TL = 30°C. This ultra-low leakage preserves accuracy in high-impedance reference divider networks and minimizes standby power loss in always-on protection circuits.
Does 1PMT5943C/TR7 meet industry ESD standards?
Yes, 1PMT5943C/TR7 is rated for >16 kV per Human Body Model (HBM), exceeding JEDEC JS-001 Class 3B requirements. This robustness allows safe handling and assembly in standard electronics manufacturing environments without requiring additional ESD mitigation on the PCB or in the production line.
1PMT5943C/TR7 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/TR7 FAQ
1.How can I place an order for 1PMT5943C/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5943C/TR7 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/TR7 reliable?
The price and inventory of 1PMT5943C/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5943C/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5943C/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5943C/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5943C/TR7?
1PMT5943C/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5943C/TR7 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/TR7?
For technical support, including 1PMT5943C/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5943C/TR7 requirements.
6.How does Aetrix verify that 1PMT5943C/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5943C/TR7 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/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5943C/TR7?
All 1PMT5943C/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5943C/TR7, 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/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5943C/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5943C/TR7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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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
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SMAZ12-13-F
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