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Microchip Technology 1PMT5931E3/TR7
- Part No.:
- 1PMT5931E3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5931E3/TR7.pdf
- Description:
- DIODE ZENER 18V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,170
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Product details
Overview
1PMT5931E3/TR7 from Microsemi is a 18 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 13.7 mA maximum Zener current (IZM), 12 Ω dynamic impedance (ZZT), and 650 µA max reverse leakage (IR) at 13.7 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails of industrial control modules.
For engineers reviewing the 1PMT5931E3/TR7 datasheet, 1PMT5931E3/TR7 pinout, 1PMT5931E3/TR7 application, or 1PMT5931E3/TR7 equivalent, key selection criteria include its 3.0 W thermal capability with metallic-tab heat sinking, DO-216 mechanical outline, ESD rating >16 kV HBM, and compatibility with EIA-481 tape-and-reel automated assembly.
Technical Context
This Zener diode operates in reverse-biased breakdown mode with tightly controlled knee characteristics: IZK = 0.25 mA and ZZK = 650 Ω, enabling stable regulation even at low bias currents. Its full metallic bottom and integral locking tab provide direct thermal conduction to the PCB, achieving 30°C/W junction-to-TAB thermal resistance.
The device is characterized at TL = 30°C with VZ measured 20 seconds after DC current application, and dynamic impedance derived using 60 Hz RMS AC current equal to 10% of IZT - confirming suitability for low-noise analog reference and transient suppression where impedance stability matters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18 V ±5% at IZT = 20.8 mA - defines nominal clamping/reference level under standard test conditions |
| Max Power Dissipation | 3.0 W at TAB 1 = 60°C - sets absolute thermal limit for continuous operation on PCB copper area |
| Dynamic Impedance (ZZT) | 12 Ω at IZT - determines output voltage variation under load current changes |
| Knee Current (IZK) | 0.25 mA - minimum current needed to enter usable regulation region |
| Reverse Leakage (IR) | ≤650 µA at VR = 13.7 V - ensures low standby power loss in high-impedance bias networks |
| ESD Rating | >16 kV per HBM - provides robustness against handling and board-level electrostatic discharge events |
| Thermal Resistance | 30°C/W junction-to-TAB - quantifies thermal path efficiency to PCB copper pad |
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-sinking terminal; must be soldered to copper pour for thermal management and electrical connection |
| Lead 2 | Anode | Standard anode connection; mounted opposite TAB 1 on PCB footprint |
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 and improves thermal transfer to PCB ground plane |
| Integral heat-sink locking tab | Provides mechanical anchoring and direct thermal conduction path via TAB 1 |
| ESD robustness | >16 kV HBM rating reduces need for external protection in handling-sensitive environments |
| Tight voltage tolerance option | Available in ±2% (suffix C) and ±1% (suffix D) for precision reference applications |
Applications
| Industrial Power Supply Monitoring | Automotive Body Control Module (BCM) Reference |
|---|---|
Use Scenario: Monitoring 24 V rail voltage in programmable logic controller (PLC) backplane to trigger brownout shutdown. IC Role / Device Role / Timing Role: Zener diode acting as precision shunt reference for comparator input threshold. Use Value: 18 V nominal clamping with 12 Ω ZZT ensures <±0.25 V shift across 1–10 mA load variation, improving trip-point accuracy. | Use Scenario: Providing stable 18 V reference for microcontroller ADC calibration in BCM power domain. IC Role / Device Role / Timing Role: Shunt regulator establishing known voltage node for sensor signal conditioning circuitry. Use Value: 0.25 mA IZK enables reliable regulation even during ultra-low-power sleep modes, reducing system wake-up latency. |
| Telecom Line Card Overvoltage Protection | Medical Infusion Pump Power Rail Clamp |
Use Scenario: Clamping transients on -48 V telecom line card power bus during hot-swap insertion. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting surge energy before downstream DC/DC converters. Use Value: 3.0 W rating and 30°C/W thermal resistance allow sustained clamping without thermal runaway under repeated 100 ms surges. | Use Scenario: Protecting 18 V motor driver supply from inductive kickback in battery-powered infusion pump. IC Role / Device Role / Timing Role: Passive overvoltage clamp absorbing stored energy from solenoid coil collapse. Use Value: Metallic-tab thermal path dissipates peak pulse energy directly into PCB copper, avoiding silicon overheating during 500 ms fault events. |
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, ±5%, but in DO-41 through-hole package; no metallic tab; 500 mW rating | Limited to low-power, non-automated, or prototyping use; unsuitable for high-current thermal management | Select only if manual assembly or legacy footprint compatibility required |
| BZX84-C18 | 18 V, ±5%, SOT-23 package; 300 mW rating; 30 Ω ZZT; no metallic heat sink | Lower power handling and higher impedance reduce regulation stability in 5–20 mA range | Prefer for space-constrained, low-current bias networks where thermal load is minimal |
Compared with 1N5931B and BZX84-C18, the 1PMT5931E3/TR7 delivers 10× higher power dissipation and direct PCB thermal coupling - making it uniquely suitable for production-grade, high-reliability 18 V shunt regulation where thermal performance and automated manufacturability are critical.
Availability
1PMT5931E3/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom line cards, and medical infusion pumps requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1PMT5931E3/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 series was designed specifically for surface-mount power regulation and transient suppression in harsh-environment electronics where thermal performance, ESD robustness, and automated assembly compatibility are mandatory.
FAQ
What is the Zener voltage tolerance for 1PMT5931E3/TR7?
The 1PMT5931E3/TR7 has a standard Zener voltage tolerance of ±5% at 18 V, measured at IZT = 20.8 mA with TAB 1 held at 30°C. Tighter tolerances of ±2% (suffix C) and ±1% (suffix D) are available as custom order options. The 1PMT5931E3/TR7 marking "931" corresponds to the 18 V variant within the 1PMT59xxB family.
How is thermal management implemented in the 1PMT5931E3/TR7 package?
The 1PMT5931E3/TR7 uses a Powermite® package with a full metallic bottom and integral locking tab that serves as both mechanical anchor and primary thermal path. TAB 1 is the cathode and must be soldered to a PCB copper pour to achieve the specified 30°C/W junction-to-TAB thermal resistance and sustain 3.0 W dissipation at TAB 1 = 60°C.
Is the 1PMT5931E3/TR7 compatible with standard automated assembly processes?
Yes, the 1PMT5931E3/TR7 is fully compatible with EIA-481 tape-and-reel packaging (7″ reel: 3,000 pcs; 13″ reel: 12,000 pcs) and designed for use with automatic insertion and reflow equipment. Its Powermite® package geometry and locking tab prevent rotation or misalignment during pick-and-place, and the metallic bottom eliminates solder flux entrapment risks.
What is the maximum reverse leakage current for 1PMT5931E3/TR7?
The maximum reverse leakage current (IR) for 1PMT5931E3/TR7 is 650 µA at VR = 13.7 V, measured at TL = 30°C. This value reflects worst-case leakage under sub-breakdown bias and ensures predictable quiescent current draw in high-impedance reference divider networks used with the 1PMT5931E3/TR7.
Does the 1PMT5931E3/TR7 meet any specific ESD standards?
Yes, the 1PMT5931E3/TR7 is rated for >16 kV per the Human Body Model (HBM) ESD test standard. This high-level ESD immunity is inherent to the Powermite® construction and supports robust handling and board-level reliability without requiring additional external protection circuitry in most industrial and automotive applications.
1PMT5931E3/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:
- ±20%
- 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
1PMT5931E3/TR7 FAQ
1.How can I place an order for 1PMT5931E3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5931E3/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 1PMT5931E3/TR7 reliable?
The price and inventory of 1PMT5931E3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5931E3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5931E3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5931E3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5931E3/TR7?
1PMT5931E3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5931E3/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 1PMT5931E3/TR7?
For technical support, including 1PMT5931E3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5931E3/TR7 requirements.
6.How does Aetrix verify that 1PMT5931E3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5931E3/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 1PMT5931E3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5931E3/TR7?
All 1PMT5931E3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5931E3/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 1PMT5931E3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5931E3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5931E3/TR7 Tags
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Diodes Incorporated
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