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Microchip Technology 1PMT5931A/TR7
- Part No.:
- 1PMT5931A/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5931A/TR7.pdf
- Description:
- DIODE ZENER 18V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,828
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Product details
Overview
1PMT5931A/TR7 from Microsemi is a 18 V, 3.0 W surface-mount Zener diode in the Powermite® package (DO-216), featuring 12 Ω dynamic impedance at 20.8 mA test current, 650 µA max reverse leakage at 13.7 V, and ESD rating >16 kV HBM - used for precision voltage regulation and overvoltage protection in DC power rails.
For engineers reviewing the 1PMT5931A/TR7 datasheet, 1PMT5931A/TR7 pinout, 1PMT5931A/TR7 application, or 1PMT5931A/TR7 equivalent, key selection criteria include zener voltage tolerance (±5%), thermal resistance (30°C/W junction-to-tab), low knee impedance (0.25 Ω), 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 and clamp device, with cathode designated by TAB 1 and full metallic bottom enabling flux-free reflow soldering. Its Powermite® package integrates a locking tab that serves as both mechanical anchor and thermal path to PCB copper.
The device delivers stable 18 V regulation under DC conditions with tight dynamic impedance control (12 Ω at IZT = 20.8 mA) and low knee current (0.25 mA), supporting reliable operation across -55°C to +150°C junction temperature range and 3.0 W power dissipation when tab temperature is held at 60°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 18 V ±5% at 20.8 mA - defines nominal clamping level for overvoltage protection circuits |
| Power Dissipation | 3.0 W with TAB 1 at 60°C - sets maximum continuous DC power handling capability |
| Dynamic Impedance ZZT | 12 Ω at IZT = 20.8 mA - determines voltage regulation stability under load transients |
| Reverse Leakage IR | ≤650 µA at VR = 13.7 V - ensures minimal standby current in high-impedance bias networks |
| Thermal Resistance θJ-TAB | 30°C/W junction-to-TAB1 - enables thermal design using tab as primary heat sink path |
| ESD Rating | >16 kV per Human Body Model - supports robustness in handling and board-level ESD events |
| Knee Impedance ZZK | 0.25 Ω - ensures sharp turn-on characteristic near breakdown threshold |
Pinout & Package
Package: Powermite® (DO-216), molded surface-mount package with full metallic bottom and integral locking tab; cathode identified by TAB 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat-sinking terminal and voltage reference node; must be connected to ground or low-impedance return path |
| Lead 2 | Anode | Input terminal for reverse-biased operation; connects to protected or regulated node |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow without flux entrapment due to full metallic bottom |
| Integral heat sink locking tab | Provides mechanical retention during assembly and reduces thermal resistance to PCB copper |
| Low knee impedance (0.25 Ω) | Ensures predictable turn-on behavior at low currents for precision reference applications |
| ESD rating >16 kV HBM | Eliminates need for external ESD protection in many end-equipment interfaces |
| Tape-and-reel packaging (EIA-481) | Supports high-volume SMT production with 3,000 pcs/reel on 7-inch carrier |
Applications
| DC Power Rail Clamping | Industrial Sensor Reference |
|---|---|
Use Scenario: Protecting 24 V industrial PLC I/O modules from transient surges exceeding 18 V. IC Role / Device Role / Timing Role: Two-terminal shunt regulator acting as voltage clamp between supply rail and ground. Use Value: Limits voltage excursions to ≤18.9 V (max) while dissipating up to 3.0 W, preventing downstream IC damage. | Use Scenario: Providing stable 18 V reference for analog front-end circuitry in pressure transducers. IC Role / Device Role / Timing Role: Precision Zener reference source with low dynamic impedance for ADC bias networks. Use Value: Maintains <±0.9 V regulation error across temperature and current variations, improving sensor accuracy. |
| Automotive Body Control Unit | Telecom Power Sequencing |
Use Scenario: Overvoltage protection on 12 V battery-supplied microcontroller reset lines in BCM modules. IC Role / Device Role / Timing Role: Fail-safe voltage clamp ensuring MCU remains in reset during load-dump events. Use Value: Withstands 100 ms pulses at 30 V while holding clamped voltage below 19.5 V, meeting ISO 7637-2 requirements. | Use Scenario: Enabling controlled power-up sequencing of FPGA core and I/O banks via voltage-dependent enable logic. IC Role / Device Role / Timing Role: Zener-based threshold detector triggering enable signals when 18 V rail reaches regulation. Use Value: Sharp knee characteristic (0.25 Ω) ensures clean, repeatable activation timing within ±100 µs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5931B | Same 18 V zener voltage and 3.0 W rating, but in DO-41 through-hole package; no metallic bottom or locking tab | Requires wave soldering or hand assembly; unsuitable for high-density SMT layouts | Select when legacy through-hole design or manual prototyping is required |
| BZX84-C18 | 18 V, 300 mW SOT-23 package; 10× lower power rating and higher dynamic impedance (30 Ω) | Limited to low-power signal-level clamping; cannot replace 1PMT5931A/TR7 in 3 W rail protection | Select only for space-constrained, low-current bias/reference use cases |
Compared with 1N5931B and BZX84-C18, the 1PMT5931A/TR7 uniquely combines SMT compatibility, 3.0 W power handling, and thermal performance via its Powermite® tab-sink architecture - making it irreplaceable in high-reliability, high-power density applications where thermal management and automated assembly are critical.
Availability
1PMT5931A/TR7 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, telecom power sequencing, and sensor reference designs requiring stable component supply and long-term obsolescence support.
Supply support for 1PMT5931A/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 manufacturer specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The Powermite® Zener series was designed for ruggedized surface-mount voltage regulation in harsh-environment systems where thermal performance, ESD immunity, and automated manufacturability are essential.
FAQ
What is the zener voltage tolerance for 1PMT5931A/TR7?
The 1PMT5931A/TR7 has a standard zener voltage tolerance of ±5% at 18 V, measured at 20.8 mA test current and 30°C tab temperature. Tighter tolerances (±2% and ±1%) are available with suffixes C and D respectively, but the base part number 1PMT5931A/TR7 specifies ±5%.
Can 1PMT5931A/TR7 be used in place of through-hole Zeners like 1N5931B?
No - while 1PMT5931A/TR7 and 1N5931B share identical electrical specs (18 V, 3.0 W), they differ fundamentally in package: 1PMT5931A/TR7 uses DO-216 surface-mount Powermite® with metallic tab, whereas 1N5931B is DO-41 through-hole. Direct substitution requires PCB redesign and is not recommended without thermal and layout validation.
What is the maximum reverse leakage current for 1PMT5931A/TR7?
The maximum reverse leakage current for 1PMT5931A/TR7 is 650 µA at a reverse voltage of 13.7 V and ambient temperature of 30°C. This value is specified in the Electrical Characteristics table and reflects worst-case leakage before full zener conduction begins.
How is thermal management handled in the 1PMT5931A/TR7 Powermite® package?
The 1PMT5931A/TR7 uses TAB 1 as its primary thermal path, with a specified junction-to-tab thermal resistance of 30°C/W. Effective thermal management requires direct connection of TAB 1 to a large copper pour or internal ground plane; the locking tab enhances mechanical and thermal contact during reflow soldering.
Is 1PMT5931A/TR7 compatible with lead-free reflow processes?
Yes - the 1PMT5931A/TR7 Powermite® package is qualified for standard lead-free reflow profiles (J-STD-020), supported by its rated junction temperature range (-55°C to +150°C) and full metallic bottom that prevents flux entrapment, ensuring reliable solder joint formation without voiding or delamination.
1PMT5931A/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):
- 18 V
- Tolerance:
- ±10%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 12 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 13.7 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
1PMT5931A/TR7 FAQ
1.How can I place an order for 1PMT5931A/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5931A/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 1PMT5931A/TR7 reliable?
The price and inventory of 1PMT5931A/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5931A/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5931A/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5931A/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5931A/TR7?
1PMT5931A/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5931A/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 1PMT5931A/TR7?
For technical support, including 1PMT5931A/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5931A/TR7 requirements.
6.How does Aetrix verify that 1PMT5931A/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5931A/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 1PMT5931A/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5931A/TR7?
All 1PMT5931A/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5931A/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 1PMT5931A/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5931A/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5931A/TR7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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Diodes Incorporated
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SMAJ4744A-TP
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