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Microchip Technology 1PMT5931BE3/TR7
- Part No.:
- 1PMT5931BE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5931BE3/TR7.pdf
- Description:
- DIODE ZENER 18V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,777
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Product details
Overview
1PMT5931BE3/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 12 Ω dynamic impedance at 20.8 mA test current and thermal resistance of 30°C/W junction-to-TAB. It serves as a precision voltage reference or overvoltage clamp in power supply regulation and transient protection circuits.
For engineers reviewing the 1PMT5931BE3/TR7 datasheet, 1PMT5931BE3/TR7 pinout, 1PMT5931BE3/TR7 application, or 1PMT5931BE3/TR7 equivalent, key selection criteria include zener voltage tolerance, power derating above 60°C, knee current (0.25 mA), reverse leakage (<1 µA at 13.7 V), and ESD robustness (>16 kV HBM).
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 eliminate solder flux entrapment during reflow assembly.
The device exhibits low reverse leakage (≤1 µA at VR = 13.7 V), 12 Ω dynamic impedance at IZT = 20.8 mA, and a 30°C/W thermal resistance from junction to TAB 1 - enabling stable operation up to +150°C junction temperature when properly heatsinked.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 18 V ±5% at IZT = 20.8 mA - defines nominal clamping/reference level under standard test conditions |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - maximum continuous DC power before thermal runaway with proper PCB copper thermal relief |
| Dynamic Impedance | 12 Ω at IZT - indicates voltage regulation stability against load current variations |
| Knee Current | 0.25 mA - minimum current required to enter usable breakdown region with <10% voltage deviation |
| Reverse Leakage | ≤1 µA at VR = 13.7 V - ensures low standby power loss in high-impedance bias networks |
| Thermal Resistance | 30°C/W junction-to-TAB 1 - quantifies thermal path efficiency for PCB-level heatsinking design |
| ESD Rating | >16 kV per HBM - supports handling and board-level robustness without external protection |
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 electrical cathode connection; must be soldered to copper pour for thermal management |
| Lead 2 | Anode | Standard anode connection; polarity confirmed by cathode marking on package body |
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 |
| Integral heat sink locking tab | Provides mechanical anchoring and direct thermal path from junction to PCB copper, reducing thermal resistance by ~40% vs. standard SOD packages |
| Full metallic bottom | Eliminates solder flux entrapment risk during assembly, improving long-term reliability and void-free solder joints |
| ESD robustness >16 kV HBM | Allows direct integration into exposed I/O or front-end circuits without additional ESD protection components |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler feedback loop. IC Role / Device Role / Timing Role: Zener reference for TL431-like shunt regulator circuit; sets precise 18 V threshold for error amplifier input. Use Value: Tight ±5% tolerance and low 12 Ω dynamic impedance ensure stable regulation across line/load transients without compensation redesign. | Use Scenario: Providing stable excitation voltage to bridge-based pressure sensors in factory automation systems. IC Role / Device Role / Timing Role: Precision voltage reference source; supplies constant 18 V to Wheatstone bridge with minimal drift. Use Value: ≤1 µA reverse leakage at 13.7 V prevents loading of high-impedance sensor outputs, preserving measurement accuracy. |
| Overvoltage Clamp for MCU I/O | DC Bus Voltage Monitor |
Use Scenario: Protecting 3.3 V or 5 V microcontroller GPIO pins from ESD and surge events. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between I/O line and ground; clamps spikes above 18 V. Use Value: >16 kV HBM rating allows direct placement at connector interface without series resistance or RC filtering. | Use Scenario: Monitoring 24 V DC industrial bus for undervoltage/overvoltage faults in PLC backplanes. IC Role / Device Role / Timing Role: Zener-based comparator reference; triggers fault logic when bus exceeds 18 V threshold. Use Value: Stable 18 V regulation at 20.8 mA enables reliable trip-point setting even with ambient temperature swings from −40°C to +85°C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5351B | Same 18 V nominal, but DO-41 through-hole package; 5 W rating; higher thermal resistance (50°C/W) | Requires manual or wave soldering; unsuitable for high-density SMT layouts | Select only if legacy through-hole assembly or higher power margin is required |
| BZX84-C18 | SOT-23 package; 300 mW rating; ±5% tolerance; 20 Ω dynamic impedance at 5 mA | Limited to low-power signal-level clamping; cannot sustain 3.0 W continuous dissipation | Choose for space-constrained signal chains where power stress is negligible |
Compared with 1N5351B and BZX84-C18, the 1PMT5931BE3/TR7 uniquely delivers 3.0 W SMT power handling with 30°C/W thermal resistance and >16 kV ESD robustness - making it optimal for industrial power rail protection and regulation where both density and ruggedness are required.
Availability
1PMT5931BE3/TR7 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor references, overvoltage clamping, and DC bus monitoring requiring stable component supply and long-term manufacturability.
Supply support for 1PMT5931BE3/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 RF solutions for aerospace, defense, and industrial markets.
The Powermite® Zener diode product line was designed for high-power-density voltage regulation and transient suppression in harsh-environment power systems where thermal performance and ESD resilience are critical.
FAQ
What is the zener voltage tolerance for 1PMT5931BE3/TR7?
The 1PMT5931BE3/TR7 has a standard zener voltage tolerance of ±5% at 18 V nominal, measured at 20.8 mA test current and TAB 1 temperature of 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D, but the base part number 1PMT5931BE3/TR7 specifies ±5%.
Can 1PMT5931BE3/TR7 be used in reflow soldering processes?
Yes, the 1PMT5931BE3/TR7 is qualified for standard lead-free reflow profiles. Its Powermite® package features a full metallic bottom that eliminates solder flux entrapment, and its junction temperature rating extends to +150°C - supporting compatibility with IPC/JEDEC J-STD-020-compliant thermal cycling.
What is the maximum reverse voltage before breakdown for 1PMT5931BE3/TR7?
The 1PMT5931BE3/TR7 begins transitioning into breakdown near 13.7 V, defined as the reverse voltage (VR) at which maximum reverse current IR is specified (≤1 µA). Full zener regulation occurs at the nominal 18 V point with 20.8 mA test current - not at VR.
How does thermal resistance affect the usable power of 1PMT5931BE3/TR7?
The 1PMT5931BE3/TR7 has a junction-to-TAB thermal resistance of 30°C/W. At TAB 1 = 60°C, it sustains 3.0 W; above that, power must be linearly derated - e.g., at TAB 1 = 100°C, max power drops to 1.8 W. PCB copper area directly bonded to TAB 1 determines actual thermal performance.
Is 1PMT5931BE3/TR7 suitable for automotive applications?
The 1PMT5931BE3/TR7 meets AEC-Q200 stress test requirements for passive components and operates from −55°C to +150°C junction temperature. While not AEC-Q101 qualified as a discrete semiconductor, its robust construction and ESD rating (>16 kV HBM) support use in under-hood power conditioning and body control modules where qualification flexibility exists.
1PMT5931BE3/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:
- ±5%
- 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
1PMT5931BE3/TR7 FAQ
1.How can I place an order for 1PMT5931BE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5931BE3/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 1PMT5931BE3/TR7 reliable?
The price and inventory of 1PMT5931BE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5931BE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5931BE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5931BE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5931BE3/TR7?
1PMT5931BE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5931BE3/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 1PMT5931BE3/TR7?
For technical support, including 1PMT5931BE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5931BE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5931BE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5931BE3/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 1PMT5931BE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5931BE3/TR7?
All 1PMT5931BE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5931BE3/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 1PMT5931BE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5931BE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5931BE3/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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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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