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Microchip Technology 1PMT5943CE3/TR7
- Part No.:
- 1PMT5943CE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5943CE3/TR7.pdf
- Description:
- DIODE ZENER 56V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,318
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Product details
Overview
1PMT5943CE3/TR7 from Microsemi is a 56 V ±5% 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 and overvoltage protection in compact DC power rails.
For engineers reviewing the 1PMT5943CE3/TR7 datasheet, 1PMT5943CE3/TR7 pinout, 1PMT5943CE3/TR7 application, or 1PMT5943CE3/TR7 equivalent, key selection criteria include zener voltage tolerance (±5%), thermal resistance (30°C/W junction-to-TAB), ESD rating (>16 kV HBM), reverse leakage (≤1 µA at 42.6 V), 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 low reverse leakage (≤1 µA at VR = 42.6 V) and tight dynamic impedance control (86 Ω at IZT = 6.7 mA), enabling accurate clamping in low-power protection circuits. Junction temperature range is -55°C to +150°C, with thermal resistance of 30°C/W from junction to TAB 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 56 V ±5% - precise clamping threshold for 48 V system overvoltage protection |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - supports sustained regulation without heatsink in space-constrained layouts |
| Test Current | 6.7 mA - defined operating point for voltage measurement and impedance characterization |
| Dynamic Impedance | 86 Ω at 6.7 mA - ensures minimal voltage deviation under small-signal current variations |
| Knee Impedance | 1300 Ω at 0.25 mA - defines low-current regulation onset for standby-mode protection |
| Reverse Leakage | ≤1 µA at 42.6 V - guarantees negligible standby current in always-on monitoring circuits |
| ESD Rating | >16 kV per HBM - provides robust handling margin during SMT assembly and board handling |
| Thermal Resistance | 30°C/W junction-to-TAB - enables direct thermal path to PCB ground plane for thermal stability |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral heat sink locking tab; cathode designated by TAB 1; weight ≈ 0.016 g; mounting position unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat sink interface and voltage reference node; must be connected to low-impedance ground or return path |
| Lead 2 | Anode | Input terminal for reverse-biased operation; connects to protected rail or signal line |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables high-density layout and compatibility with automated pick-and-place equipment per EIA-481 standard |
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term reliability and void-free solder joints |
| Integral heat sink locking tab | Provides mechanical anchoring and direct thermal conduction path from junction to PCB copper |
| Low reverse leakage (≤1 µA) | Minimizes quiescent current draw in battery-backed or energy-harvesting systems |
| Wide operating temperature range | -55°C to +150°C junction/storage range supports deployment in automotive under-hood and industrial environments |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Clamping transient spikes on 48 V auxiliary rails in programmable logic controller (PLC) power stages. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator and overvoltage clamp. Use Value: Maintains rail integrity within ±5% tolerance while dissipating up to 3.0 W during surge events, leveraging 30°C/W thermal resistance for PCB-level cooling. | Use Scenario: Protecting microcontroller I/O pins from load-dump transients in BCM door module interfaces. IC Role / Device Role / Timing Role: Standby-mode voltage clamp with ≤1 µA leakage at 42.6 V. Use Value: Ensures zero impact on sleep current budget while providing >16 kV HBM ESD immunity during manufacturing and field service. |
| Telecom DC-DC Converter Reference | Medical Sensor Signal Conditioning |
Use Scenario: Providing stable 56 V reference for feedback loop in isolated flyback converter powering optical transceivers. IC Role / Device Role / Timing Role: Precision voltage reference with 86 Ω dynamic impedance at 6.7 mA. Use Value: Delivers <0.1% output voltage drift under varying load due to tight Zener voltage tolerance and low ZZT. | Use Scenario: Overvoltage protection for analog front-end inputs in portable ultrasound probe signal chains. IC Role / Device Role / Timing Role: Low-leakage clamping element on ±15 V signal paths. Use Value: Prevents ADC saturation without injecting error current (<1 µA), preserving SNR in low-noise amplifiers. |
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 ±5% rating but in DO-41 through-hole package; higher thermal resistance (50°C/W) and no metallic bottom | Requires PCB footprint change and manual assembly; unsuitable for high-volume SMT lines | Select when legacy through-hole design or prototyping with breadboard compatibility is required |
| BZX84-C56 | 56 V ±5% SOT-23 package; lower power rating (300 mW); 10× higher reverse leakage (≤5 µA at 45.6 V) | Limited to low-power signal-level clamping; cannot sustain 3.0 W surges | Select only for cost-sensitive, low-energy applications where thermal performance is non-critical |
Compared with 1N5943B and BZX84-C56, the 1PMT5943CE3/TR7 delivers superior thermal management (30°C/W vs. 50°C/W or unlisted), higher surge capability (3.0 W vs. 0.3 W), and lower leakage-making it the only option qualified for industrial-grade 48 V rail protection with automated assembly support.
Availability
1PMT5943CE3/TR7 is available at Aetrix Electronics and suitable for industrial power supply protection, automotive body control modules, telecom DC-DC converter reference, and medical sensor signal conditioning requiring stable component supply across extended temperature ranges and high-reliability assembly processes.
Supply support for 1PMT5943CE3/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 designed specifically for surface-mount applications demanding high power density, robust thermal performance, and automated manufacturability in harsh-environment electronics.
FAQ
What is the Zener voltage tolerance for 1PMT5943CE3/TR7?
The 1PMT5943CE3/TR7 has a nominal Zener voltage of 56 V with a standard tolerance of ±5%, as specified in the MSC0995 datasheet. This tolerance applies at test current IZT = 6.7 mA and TAB temperature of 30°C. Tighter tolerances (±2% or ±1%) are available with suffixes C or D, but the CE3/TR7 variant uses the standard ±5% grade.
How is thermal management handled in the 1PMT5943CE3/TR7 package?
The 1PMT5943CE3/TR7 uses Microsemi's Powermite® package with a full metallic bottom and integral heat sink locking tab that directly conducts heat from the junction to the PCB. Its specified thermal resistance is 30°C/W junction-to-TAB, enabling effective passive cooling without external heatsinks when mounted on adequate copper area.
Is 1PMT5943CE3/TR7 compatible with automated SMT assembly processes?
Yes, the 1PMT5943CE3/TR7 is supplied in EIA-481 standard tape-and-reel format (7-inch reel, 3,000 pieces) and features a surface-mount Powermite® package optimized for pick-and-place equipment. Its locking tab and flux-free metallic bottom ensure reliable placement and void-free reflow soldering in high-volume production.
What is the maximum reverse leakage current for 1PMT5943CE3/TR7?
The maximum reverse leakage current for 1PMT5943CE3/TR7 is 1 µA at a reverse voltage of 42.6 V (76% of nominal Zener voltage), measured at TL = 30°C. This low leakage supports energy-efficient designs, especially in battery-powered or always-on monitoring applications where standby current must be minimized.
Does 1PMT5943CE3/TR7 meet any ESD robustness standards?
Yes, the 1PMT5943CE3/TR7 is rated for >16 kV per the Human Body Model (HBM) ESD standard, as confirmed in the MSC0995 datasheet. This high ESD rating ensures resilience during handling, automated assembly, and field operation-critical for automotive and industrial applications exposed to electrostatic discharge events.
1PMT5943CE3/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
1PMT5943CE3/TR7 FAQ
1.How can I place an order for 1PMT5943CE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5943CE3/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 1PMT5943CE3/TR7 reliable?
The price and inventory of 1PMT5943CE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5943CE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5943CE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5943CE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5943CE3/TR7?
1PMT5943CE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5943CE3/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 1PMT5943CE3/TR7?
For technical support, including 1PMT5943CE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5943CE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5943CE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5943CE3/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 1PMT5943CE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5943CE3/TR7?
All 1PMT5943CE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5943CE3/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 1PMT5943CE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5943CE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5943CE3/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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Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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