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Microchip Technology 1PMT5943BE3/TR7
- Part No.:
- 1PMT5943BE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5943BE3/TR7.pdf
- Description:
- DIODE ZENER 56V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,573
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Product details
Overview
1PMT5943BE3/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 dynamic impedance of 86 Ω at 6.7 mA test current and reverse leakage ≤1 µA at 42.6 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails and regulator feedback paths.
For engineers reviewing the 1PMT5943BE3/TR7 datasheet, 1PMT5943BE3/TR7 pinout, 1PMT5943BE3/TR7 application, or 1PMT5943BE3/TR7 equivalent, key selection criteria include zener voltage tolerance, thermal resistance (30°C/W junction-to-TAB), ESD rating (>16 kV HBM), low knee impedance, and compatibility with automated SMT assembly.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across its specified test current range. Its Powermite® package integrates a full metallic bottom and locking tab to enhance thermal conduction and mechanical stability during reflow.
The device exhibits low reverse leakage (≤1 µA at VR = 42.6 V), a knee impedance of 0.25 Ω at IZK = 6.7 mA, and is characterized at TL = 30°C with voltage measurement performed 20 seconds after DC current application per Note 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 56 V ±5% at IZT = 6.7 mA - defines stable regulation point for feedback or clamping |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - sets maximum continuous power handling under thermal constraint |
| Dynamic Impedance (ZZT) | 86 Ω at IZT = 6.7 mA - indicates voltage stability under small-signal AC variations |
| Knee Impedance (ZZK) | 0.25 Ω at IZK = 6.7 mA - reflects low-impedance turn-on behavior near regulation threshold |
| Reverse Leakage (IR) | ≤1 µA at VR = 42.6 V - ensures minimal standby current in high-impedance bias networks |
| Thermal Resistance | 30°C/W junction-to-TAB1 - enables thermal modeling for PCB copper pad sizing and heatsinking |
| ESD Rating | >16 kV per Human Body Model - supports robustness in handling and board-level ESD events |
Pinout & Package
Package: Powermite® (DO-216AA), molded surface-mount package with full metallic bottom and integral heat sink locking tab; cathode designated by TAB 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat path and electrical cathode connection; must be soldered to thermal pad for rated power dissipation |
| Lead 2 | Anode | Standard anode terminal; mounted opposite TAB 1 on DO-216 outline |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow while delivering 3.0 W power handling in compact footprint |
| Full metallic bottom | Eliminates solder flux entrapment and improves thermal transfer to PCB ground plane |
| Integral heat sink locking tab | Provides mechanical anchoring and direct thermal conduction path from junction to TAB 1 |
| ESD robustness | >16 kV HBM rating reduces risk of field failure during handling and system integration |
| Tight voltage tolerance option | ±5% standard; ±2% (suffix C) and ±1% (suffix D) available for precision reference applications |
Applications
| DC Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated flyback or buck-derived auxiliary supplies. IC Role / Device Role: Precision shunt reference providing stable 56 V setpoint for optocoupler-driven control loop. Use Value: Maintains regulation accuracy within ±5% despite load/line variation, leveraging low ZZT and tight thermal resistance. | Use Scenario: Clamping transient surges on industrial 48 V DC bus lines exposed to inductive switching. IC Role / Device Role: Fast-acting voltage clamp limiting rail excursions to ≤56 V during EFT or surge events. Use Value: Absorbs up to 3.0 W peak power without degradation, aided by metallic TAB thermal path. |
| Programmable Voltage Reference | Temperature-Stable Bias Network |
Use Scenario: Generating fixed reference for ADC input scaling or DAC output calibration in test equipment. IC Role / Device Role: Low-drift, low-noise shunt reference with predictable VZ temperature coefficient. Use Value: Delivers stable 56 V reference with <1 µA IR, minimizing loading error in high-Z divider networks. | Use Scenario: Establishing bias points for op-amp input stages operating across -40°C to +85°C ambient. IC Role / Device Role: Zener-based bias generator compensating for transistor VBE drift. Use Value: Junction-to-TAB thermal resistance of 30°C/W allows predictable thermal tracking when mounted on shared copper. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ56A | TVS diode (not Zener); 56 V standoff, 600 W peak pulse power, higher clamping voltage (~93.6 V) | Designed for transient suppression, not precision regulation | Select only for surge protection where precise DC regulation is not required |
| BZX84-C56 | SOT-23 package; 56 V ±5%, 300 mW Pd, 40 Ω ZZT at 5 mA, no metallic thermal tab | Limited to low-power bias/reference use; unsuitable for >0.3 W continuous dissipation | Choose for space-constrained low-power designs where thermal performance is secondary |
Compared with SMCJ56A and BZX84-C56, the 1PMT5943BE3/TR7 uniquely combines 3.0 W DC power handling, metallic thermal tab, and precision Zener regulation-making it suitable for medium-power reference and clamping where thermal management and voltage accuracy are jointly critical.
Availability
1PMT5943BE3/TR7 is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection circuits, programmable voltage references, and temperature-stable bias networks requiring stable component supply and traceable sourcing.
Supply support for 1PMT5943BE3/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 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 delivers high-power surface-mount voltage regulation in ruggedized packages optimized for thermal performance and automated assembly in harsh-environment applications.
FAQ
What is the zener voltage tolerance for 1PMT5943BE3/TR7?
The 1PMT5943BE3/TR7 has a standard zener voltage tolerance of ±5% at 56 V, measured at IZT = 6.7 mA with TAB 1 held at 30°C. Tighter tolerances of ±2% (suffix C) and ±1% (suffix D) are available upon request. This tolerance directly impacts regulation accuracy in feedback loops and reference circuits where 1PMT5943BE3/TR7 is deployed.
How is thermal performance specified for 1PMT5943BE3/TR7?
The 1PMT5943BE3/TR7 specifies a thermal resistance of 30°C/W from junction to TAB 1, enabling accurate thermal modeling when the metallic TAB is soldered to a PCB copper pour. Its Powermite® package uses a full metallic bottom and locking tab to maximize heat transfer-critical for sustaining the rated 3.0 W dissipation. This thermal design makes 1PMT5943BE3/TR7 suitable for applications where passive cooling must replace active heatsinks.
Can 1PMT5943BE3/TR7 be used in automated SMT assembly?
Yes, 1PMT5943BE3/TR7 is explicitly designed for compatibility with automatic insertion and SMT reflow processes. Its Powermite® package features a unique locking tab that prevents rotation during placement and a full metallic bottom that eliminates solder flux entrapment. The device ships in EIA-481 tape-and-reel format (7″ reel: 3,000 pcs; 13″ reel: 12,000 pcs), ensuring reliable feeding in high-volume production lines using 1PMT5943BE3/TR7.
What is the maximum reverse leakage current for 1PMT5943BE3/TR7?
The maximum reverse leakage current for 1PMT5943BE3/TR7 is 1 µA at a reverse voltage of 42.6 V, measured at TL = 30°C. This low IR value ensures minimal parasitic current draw in high-impedance bias networks and precision reference dividers-key for maintaining accuracy in circuits where 1PMT5943BE3/TR7 functions as a shunt regulator or voltage clamp.
Is 1PMT5943BE3/TR7 suitable for ESD-sensitive applications?
Yes, 1PMT5943BE3/TR7 is rated for >16 kV per the Human Body Model (HBM), making it robust against electrostatic discharge during handling and board-level integration. This ESD rating exceeds typical IEC 61000-4-2 Level 4 requirements and supports use in environments where 1PMT5943BE3/TR7 interfaces with connectors, sensors, or external ports subject to user contact.
1PMT5943BE3/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:
- ±5%
- 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
1PMT5943BE3/TR7 FAQ
1.How can I place an order for 1PMT5943BE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5943BE3/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 1PMT5943BE3/TR7 reliable?
The price and inventory of 1PMT5943BE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5943BE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5943BE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5943BE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5943BE3/TR7?
1PMT5943BE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5943BE3/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 1PMT5943BE3/TR7?
For technical support, including 1PMT5943BE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5943BE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5943BE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5943BE3/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 1PMT5943BE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5943BE3/TR7?
All 1PMT5943BE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5943BE3/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 1PMT5943BE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5943BE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5943BE3/TR7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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