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Microchip Technology 1PMT5931B/TR7
- Part No.:
- 1PMT5931B/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5931B/TR7.pdf
- Description:
- DIODE ZENER 18V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,322
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Product details
Overview
1PMT5931B/TR7 from Microsemi is a 3.0 W surface-mount Zener diode in the Powermite® package, with nominal Zener voltage 18 V at 20.8 mA test current, dynamic impedance 12 Ω, and thermal resistance 30°C/W junction-to-tab. It features full metallic bottom to prevent solder flux entrapment and integral locking tab acting as heat sink, used for voltage regulation in compact DC power supplies.
For engineers reviewing the 1PMT5931B/TR7 datasheet, 1PMT5931B/TR7 pinout, 1PMT5931B/TR7 application, or 1PMT5931B/TR7 equivalent, key selection criteria include Zener voltage tolerance (±5%), reverse leakage ≤1 µA at 13.7 V, ESD rating >16 kV HBM, and compatibility with automated SMT insertion equipment.
Technical Context
This Zener diode operates as a precision shunt voltage regulator with stable breakdown behavior across -55°C to +150°C junction temperature range. Its DO-216 package integrates a metallic tab (TAB 1) serving as both cathode terminal and primary thermal path, enabling 3.0 W power dissipation when tab temperature is held at 60°C.
Electrical performance is defined at TL = 30°C with 20-second DC stabilization per measurement protocol. Zener impedance (12 Ω) is measured using 60 Hz RMS AC current equal to 10% of IZT, and knee current (0.25 mA) ensures low-current regulation capability down to 13.7 V reverse bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 18 V ±5% at 20.8 mA - defines regulated output voltage under nominal bias |
| Power Dissipation | 3.0 W - maximum continuous DC power at TAB 1 = 60°C, enabling high-density board layouts |
| Dynamic Impedance ZZT | 12 Ω - low AC impedance ensures minimal output voltage variation under load transients |
| Reverse Leakage IR | ≤1 µA at 13.7 V - guarantees low standby current in battery-powered or low-power hold-up circuits |
| Thermal Resistance RθJ-TAB | 30°C/W - quantifies junction-to-tab thermal path efficiency for heatsink design and thermal derating |
| ESD Rating | >16 kV HBM - provides robust handling safety during automated assembly and field operation |
| Knee Current IZK | 0.25 mA - enables regulation onset at very low currents, supporting ultra-low-power reference applications |
Pinout & Package
Package: Powermite® (DO-216), molded surface-mount package with full metallic bottom and integral locking tab (TAB 1). Cathode is designated by TAB 1; mounting orientation is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary current-carrying and thermal interface; must be connected to PCB copper pour for thermal management |
| Lead 2 | Anode | Standard anode connection; electrically isolated from TAB 1; requires standard SMT pad layout |
Key Features
| Feature | Design Value |
|---|---|
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term reliability and reducing post-assembly cleaning needs |
| Integral locking tab | Acts as built-in heat sink and mechanical anchor, enhancing thermal transfer and preventing tombstoning during SMT placement |
| Automated insertion compatibility | Designed for pick-and-place and reflow processes per EIA-481 tape-and-reel standard (7″/3,000 pcs) |
| Tight voltage tolerance option | Available in ±2% (suffix C) and ±1% (suffix D) - supports precision reference designs without external trimming |
Applications
| DC Power Supply Regulation | Battery Protection Circuit |
|---|---|
Use Scenario: Stabilizing intermediate rail voltages in multi-output switch-mode power supplies where space is constrained. IC Role / Device Role / Timing Role: Shunt voltage regulator maintaining 18 V output despite input ripple and load variation. Use Value: 3.0 W power handling and 30°C/W thermal resistance allow direct mounting on small copper areas without external heatsinks. | Use Scenario: Overvoltage clamping in Li-ion battery pack protection modules to prevent cell damage during charging faults. IC Role / Device Role / Timing Role: Precision crowbar element triggering cutoff when pack voltage exceeds 18 V threshold. Use Value: ≤1 µA reverse leakage at 13.7 V minimizes quiescent drain on protected battery during standby. |
| Industrial Sensor Reference | ESD-Sensitive Interface Protection |
Use Scenario: Providing stable 18 V bias for analog front-end op-amps in harsh-environment pressure or temperature sensors. IC Role / Device Role / Timing Role: Low-drift voltage reference source with tight ±5% initial tolerance and low dynamic impedance. Use Value: 12 Ω ZZT ensures <180 mV output shift under 15 mA load step, preserving sensor signal integrity. | Use Scenario: Secondary-level transient suppression on RS-485 or CAN bus lines exposed to industrial ESD events. IC Role / Device Role / Timing Role: Fast-response shunt clamp absorbing >16 kV HBM discharges before downstream transceivers. Use Value: >16 kV HBM rating and DO-216 low-inductance layout reduce clamping delay and peak voltage overshoot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF18A (ON Semiconductor) | Same 18 V nominal, 1.0 W rating, SOD-123 package, higher ZZT (30 Ω), lower ESD (15 kV HBM) | Limited to lower-power regulation; unsuitable for 3 W thermal loads | Select when board space is tighter and power demand ≤1 W |
| BZX84-C18 (Diodes Inc.) | 18 V ±5%, 300 mW rating, SOT-23 package, ZZT = 40 Ω, no specified ESD rating | Not suitable for high-current or high-reliability industrial environments | Select only for cost-sensitive consumer applications with low power and non-critical ESD requirements |
Compared with SMF18A and BZX84-C18, the 1PMT5931B/TR7 delivers triple the power handling (3.0 W), lower dynamic impedance (12 Ω vs. ≥30 Ω), and verified >16 kV HBM robustness-making it the only choice for thermally demanding, high-reliability industrial regulation where sustained current and ESD immunity are mandatory.
Availability
1PMT5931B/TR7 is available at Aetrix Electronics and suitable for DC power supply regulation, battery protection circuits, industrial sensor references, and ESD-sensitive interface protection requiring stable component supply and long-lifecycle support.
Supply support for 1PMT5931B/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 diode product line was engineered for high-power density surface-mount voltage regulation in space-constrained, thermally aggressive environments-targeting industrial power systems, avionics, and ruggedized instrumentation.
FAQ
What is the Zener voltage tolerance for 1PMT5931B/TR7?
The 1PMT5931B/TR7 has a standard Zener voltage tolerance of ±5% at 18 V, measured at 20.8 mA test current and TAB 1 temperature of 30°C. Tighter tolerances of ±2% (suffix C) and ±1% (suffix D) are available as factory-orderable variants, but the base 1PMT5931B/TR7 shipped per this datasheet carries the ±5% specification.
How is thermal management handled for 1PMT5931B/TR7 in high-power operation?
Thermal management for 1PMT5931B/TR7 relies on its metallic TAB 1, which serves as both cathode and primary thermal conduction path. With a junction-to-tab thermal resistance of 30°C/W, the device achieves full 3.0 W dissipation only when TAB 1 is maintained at ≤60°C. Designers must connect TAB 1 to adequate PCB copper area or external heatsink to meet this requirement.
Is 1PMT5931B/TR7 compatible with standard SMT reflow profiles?
Yes, 1PMT5931B/TR7 is qualified for standard lead-free reflow processes and supplied in EIA-481 tape-and-reel format (7″ reel, 3,000 pieces). Its Powermite® package is designed for compatibility with automated pick-and-place equipment and withstands typical reflow thermal cycles without degradation to Zener characteristics or mechanical integrity.
What is the reverse leakage current specification for 1PMT5931B/TR7?
The reverse leakage current for 1PMT5931B/TR7 is specified as ≤1 µA maximum at 13.7 V reverse voltage and TL = 30°C. This low leakage supports energy-efficient operation in battery-backed or always-on circuits where standby current must be minimized without compromising regulation accuracy.
Does 1PMT5931B/TR7 have a documented ESD rating, and what test model applies?
Yes, 1PMT5931B/TR7 has a documented ESD rating of >16 kV per the Human Body Model (HBM), as stated in the MSC0995 datasheet. This rating reflects device-level robustness during handling and assembly, and supports reliable operation in industrial environments where electrostatic discharge events are common.
1PMT5931B/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
1PMT5931B/TR7 FAQ
1.How can I place an order for 1PMT5931B/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5931B/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 1PMT5931B/TR7 reliable?
The price and inventory of 1PMT5931B/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5931B/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5931B/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5931B/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5931B/TR7?
1PMT5931B/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5931B/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 1PMT5931B/TR7?
For technical support, including 1PMT5931B/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5931B/TR7 requirements.
6.How does Aetrix verify that 1PMT5931B/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5931B/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 1PMT5931B/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5931B/TR7?
All 1PMT5931B/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5931B/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 1PMT5931B/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5931B/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5931B/TR7 Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ5245BS-7-F
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BZT52C15S-7-F
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MM5Z5V1ST1G
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