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Microchip Technology 1PMT5943E3/TR7
- Part No.:
- 1PMT5943E3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5943E3/TR7.pdf
- Description:
- DIODE ZENER 56V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,875
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Product details
Overview
1PMT5943E3/TR7 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 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 1PMT5943E3/TR7 datasheet, 1PMT5943E3/TR7 pinout, 1PMT5943E3/TR7 application, or 1PMT5943E3/TR7 equivalent, key selection criteria include Zener voltage tolerance, 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, designed for stable regulation under varying load and temperature conditions. Its full metallic bottom and integral heat sink locking tab enable reliable thermal transfer and flux-free reflow soldering.
The device exhibits low reverse leakage (≤1 µA at VR = 42.6 V), tight voltage tolerance (±5%), and high ESD robustness (>16 kV HBM), making it suitable for industrial and automotive power supply monitoring where long-term stability and assembly reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V ±5% at IZT = 6.7 mA, TL = 30°C - defines nominal regulation point with production-grade tolerance |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - maximum continuous DC power handling with defined thermal boundary condition |
| Dynamic Impedance (ZZT) | 86 Ω at IZT = 6.7 mA - small-signal AC impedance affecting regulation accuracy under dynamic load changes |
| Knee Impedance (ZZK) | 1300 Ω at IZK = 0.25 mA - impedance near breakdown threshold, critical for low-current regulation fidelity |
| Reverse Leakage (IR) | ≤1 µA at VR = 42.6 V - ensures minimal standby current in protection circuits before conduction onset |
| Thermal Resistance | 30°C/W junction-to-TAB1 - quantifies thermal path efficiency from die to mounting tab for thermal design margining |
| ESD Rating | >16 kV per Human Body Model - supports robust handling and operation in unshielded industrial environments |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral heat sink locking tab; cathode designated by TAB 1; mechanical outline conforms to DO-216; weight ≈ 0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat-sinking terminal and voltage reference node; must be electrically connected to system ground or regulated return |
| Lead 2 | Anode | Current entry point during reverse-bias conduction; routed to unregulated input or transient source |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow while delivering 3.0 W power handling in footprint comparable to smaller SMD diodes |
| Full metallic bottom | Eliminates solder flux entrapment risk during reflow, improving long-term solder joint integrity and process yield |
| Integral heat sink locking tab | Provides direct thermal path from junction to PCB copper, reducing thermal resistance to 30°C/W (junction-to-TAB1) |
| ESD robustness | >16 kV HBM rating allows safe handling and operation without additional on-board ESD protection circuitry |
Applications
| Industrial Power Supply Monitoring | Automotive Engine Control Unit (ECU) Protection |
|---|---|
Use Scenario: Monitoring 48 V battery-derived rail in programmable logic controllers to detect overvoltage faults before damage occurs. IC Role / Device Role / Timing Role: Zener clamping element providing precise 56 V threshold detection with ≤1 µA leakage below trip point. Use Value: Enables fail-safe shutdown via comparator input with minimal quiescent current draw and no external bias network required. | Use Scenario: Protecting 5 V microcontroller I/O lines from load-dump transients in 12 V automotive systems. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between I/O pin and ground, leveraging 56 V Zener voltage to clamp spikes above system tolerance. Use Value: Absorbs up to 3.0 W peak energy without degradation, supported by >16 kV HBM rating for assembly survivability. |
| Telecom DC-DC Converter Reference | Medical Infusion Pump Voltage Regulation |
Use Scenario: Providing stable 56 V reference for feedback loop in isolated 48 V–56 V telecom DC-DC converters. IC Role / Device Role / Timing Role: Precision shunt regulator establishing output voltage setpoint with 86 Ω dynamic impedance limiting regulation error under load step changes. Use Value: Maintains <±1% output variation across 10–100% load range due to low ZZT and tight ±5% VZ tolerance. | Use Scenario: Regulating auxiliary 56 V supply for motor driver stage in battery-powered infusion pumps requiring high reliability. IC Role / Device Role / Timing Role: Primary voltage regulation element in low-noise linear post-regulator stage, operating at 6.7 mA IZT for optimal stability. Use Value: Delivers medical-grade long-term drift performance supported by -55°C to +150°C junction temperature range and hermetic molding. |
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% VZ and 3.0 W rating, but in DO-41 through-hole package; higher thermal resistance (~50°C/W) | Requires manual or wave soldering; unsuitable for high-density SMT layouts | Select when legacy through-hole assembly or higher standoff voltage (1000 VPRM) is required |
| BZX84-C56 | 56 V ±5% in SOT-23; lower power rating (300 mW); 150 Ω ZZT at 5 mA; no metallic heat sink tab | Limited to low-power signal-level clamping; cannot handle sustained 3.0 W dissipation | Select only for space-constrained signal conditioning, not power rail regulation or surge suppression |
Compared with 1PMT5943E3/TR7, 1N5943B offers identical electrical specs but lacks SMT thermal advantages, while BZX84-C56 trades power capability for footprint reduction-neither provides the 3.0 W SMT-regulation capability and 30°C/W thermal path of the 1PMT5943E3/TR7.
Availability
1PMT5943E3/TR7 is available at Aetrix Electronics and suitable for industrial power supply monitoring, automotive ECU protection, telecom DC-DC converter reference, and medical infusion pump voltage regulation requiring stable component supply and traceable sourcing.
Supply support for 1PMT5943E3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The Powermite® Zener diode product line was engineered for high-power surface-mount voltage regulation in space-constrained, thermally demanding applications-emphasizing thermal efficiency, assembly robustness, and long-term parametric stability.
FAQ
What is the Zener voltage tolerance for 1PMT5943E3/TR7?
The 1PMT5943E3/TR7 has a standard Zener voltage tolerance of ±5% at 56 V, measured at 6.7 mA test current with TAB 1 held at 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D respectively, but the base 1PMT5943E3/TR7 part uses the ±5% grade. This tolerance directly impacts regulation accuracy in precision feedback and protection circuits.
How is thermal management handled in the 1PMT5943E3/TR7 package?
The 1PMT5943E3/TR7 uses the Powermite® package with an integral heat sink locking tab and full metallic bottom to achieve a junction-to-TAB1 thermal resistance of 30°C/W. TAB 1 serves as the cathode and primary thermal interface-designers must connect it to adequate PCB copper area to maintain the 3.0 W power rating at TAB 1 = 60°C. No external heatsink is required for typical industrial duty cycles.
What does the "E3/TR7" suffix indicate in 1PMT5943E3/TR7?
The "E3" suffix denotes compliance with JEDEC J-STD-020 moisture sensitivity level 3 (MSL 3), requiring bake-out before reflow if exposed to ambient beyond floor life. "TR7" specifies packaging in 7-inch tape-and-reel per EIA-481, containing 3,000 units. Both markings are critical for manufacturing planning and SMT line setup when using the 1PMT5943E3/TR7.
Can 1PMT5943E3/TR7 be used in automotive applications?
Yes, the 1PMT5943E3/TR7 is qualified for automotive use with a junction temperature range of -55°C to +150°C and >16 kV HBM ESD rating. Its Powermite® package eliminates flux entrapment and supports automated insertion-key for Tier 1 supplier production. It is commonly deployed in engine control unit (ECU) overvoltage protection and 48 V mild-hybrid subsystems where 56 V clamping is required.
What is the maximum reverse leakage current for 1PMT5943E3/TR7?
The maximum reverse leakage current for 1PMT5943E3/TR7 is 1 µA at a reverse voltage of 42.6 V (75% of nominal VZ), measured at TL = 30°C. This low leakage ensures minimal power loss in standby mode and high impedance in non-conducting state-critical for battery-powered systems and precision reference applications where loading must be avoided.
1PMT5943E3/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:
- ±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/TR7 FAQ
1.How can I place an order for 1PMT5943E3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5943E3/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 1PMT5943E3/TR7 reliable?
The price and inventory of 1PMT5943E3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5943E3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5943E3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5943E3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5943E3/TR7?
1PMT5943E3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5943E3/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 1PMT5943E3/TR7?
For technical support, including 1PMT5943E3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5943E3/TR7 requirements.
6.How does Aetrix verify that 1PMT5943E3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5943E3/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 1PMT5943E3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5943E3/TR7?
All 1PMT5943E3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5943E3/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 1PMT5943E3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5943E3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5943E3/TR7 Tags
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