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Microchip Technology 1PMT5931/TR13
- Part No.:
- 1PMT5931/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5931/TR13.pdf
- Description:
- DIODE ZENER 18V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,184
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Product details
Overview
1PMT5931B from Microsemi is a 18 V, 3.0 W surface-mount Zener diode in the Powermite® package, featuring 12 Ω dynamic impedance at 20.8 mA test current, 650 µA max reverse leakage at 13.7 V, and thermal resistance of 30°C/W junction-to-tab. It serves as a precision voltage reference or overvoltage clamp in DC power rails and regulator feedback paths.
For engineers reviewing the 1PMT5931B datasheet, 1PMT5931B pinout, 1PMT5931B application, or 1PMT5931B equivalent, key selection criteria include zener voltage tolerance (±5% standard), ESD rating (>16 kV HBM), full metallic bottom for flux-free soldering, and tab-1 cathode designation for automated placement.
Technical Context
This Zener diode operates with a nominal zener voltage of 18 V at 20.8 mA (IZT), exhibits 12 Ω dynamic impedance (ZZT), and maintains ≤650 µA reverse leakage (IR) at 13.7 V (VR). Its 30°C/W thermal resistance enables stable regulation under 3.0 W dissipation when tab-1 is held at ≤60°C.
The Powermite® package integrates a locking tab acting as an integral heat sink and uses a molded body with full metallic bottom to prevent solder flux entrapment. Cathode is unambiguously designated by TAB 1, supporting reliable automated insertion and reflow assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18 V ±5% at 20.8 mA - defines stable regulation point for feedback or clamping |
| Power Dissipation | 3.0 W with TAB 1 at 60°C - sets maximum continuous DC load capability |
| Dynamic Impedance | 12 Ω at IZT - determines output voltage stability under load current variation |
| Reverse Leakage | ≤650 µA at 13.7 V - ensures low standby power loss in high-impedance bias networks |
| Thermal Resistance | 30°C/W junction-to-TAB 1 - enables thermal design using tab as primary heat path |
| ESD Rating | >16 kV HBM - provides robustness against handling and board-level electrostatic discharge |
| Junction Temp Range | −55°C to +150°C - supports operation in automotive under-hood and industrial environments |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral heat-sink locking tab; cathode designated by TAB 1; weight ≈0.016 g; compliant with EIA-481 tape-and-reel (7″/3,000 pcs, 13″/12,000 pcs).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary thermal path and electrical cathode connection; must be soldered to PCB copper for thermal management |
| Lead 2 | Anode | Standard anode terminal; mounted opposite TAB 1 per DO-216 mechanical outline |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables high-density PCB layout while delivering 3.0 W power handling comparable to larger through-hole Zeners |
| Integral heat-sink locking tab | TAB 1 functions as both cathode and primary thermal interface, reducing need for external heatsinking |
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term solder joint reliability |
| ESD robustness | >16 kV HBM rating reduces risk of field failure in handling and system integration |
| Automated insertion compatibility | Standardized footprint and marking support pick-and-place and AOI inspection without custom tooling |
Applications
| DC Power Supply Regulation | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing reference voltage in linear regulator feedback networks or shunt-regulated supplies. IC Role / Device Role / Timing Role: Precision shunt voltage reference providing 18 V setpoint with ±5% tolerance and low dynamic impedance. Use Value: Maintains output regulation within ±1% over line/load transients due to 12 Ω ZZT and 30°C/W thermal path. | Use Scenario: Protecting downstream ICs from transient overvoltage on 15–24 V DC rails (e.g., automotive infotainment power inputs). IC Role / Device Role / Timing Role: Fast-acting crowbar element clamping surge energy above 18 V before damage occurs. Use Value: Absorbs up to 3.0 W transient power without degradation, leveraging full-metallic bottom for repeatable surge endurance. |
| Industrial Sensor Biasing | Programmable Logic Controller (PLC) Input Conditioning |
Use Scenario: Providing stable excitation voltage for bridge-based pressure or temperature sensors in harsh factory environments. IC Role / Device Role / Timing Role: Low-leakage (≤650 µA) voltage reference ensuring sensor offset stability across −40°C to +85°C. Use Value: Minimizes measurement drift caused by reference current variation, critical for 16-bit ADC systems. | Use Scenario: Level-shifting and clamping 24 V digital inputs to safe logic levels for microcontroller GPIO protection. IC Role / Device Role / Timing Role: Bidirectional ESD clamp and overvoltage limiter with >16 kV HBM rating on field wiring terminals. Use Value: Prevents latch-up and gate oxide damage in PLC input ASICs during cable hot-plug or lightning-induced surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ON Semiconductor MMBZ5245B | 18 V ±5%, 0.5 W SOD-123 package, 20 Ω ZZT, 100 µA IR @ 13.7 V | Limited to lower-power biasing; lacks integral heat sink and 3.0 W capability | Select when space-constrained and thermal load <0.5 W; not suitable for 3.0 W clamping |
| Vishay NZ9F18V | 18 V ±5%, 0.3 W SOD-323, 30 Ω ZZT, 100 nA IR @ 13.7 V | Ultra-low leakage but insufficient power handling; no metallic thermal path | Prefer for ultra-low-current references only; cannot replace 1PMT5931B in power-clamp roles |
Compared with MMBZ5245B and NZ9F18V, the 1PMT5931B uniquely delivers 3.0 W dissipation with direct tab-1 thermal conduction-enabling use in high-energy clamping where alternatives thermally saturate or fail.
Availability
1PMT5931B is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection clamp, and industrial sensor biasing requiring stable component supply and long-lifecycle availability.
Supply support for 1PMT5931B 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.
The Powermite® Zener series was designed for high-power-density, thermally robust voltage regulation and protection in automotive, industrial, and aerospace power systems where traditional SMD Zeners lack sufficient dissipation.
FAQ
What is the zener voltage tolerance for 1PMT5931B?
The 1PMT5931B has a standard zener voltage tolerance of ±5% at 18 V. Tighter tolerances of ±2% (suffix C) and ±1% (suffix D) are available upon request. Voltage is measured at 20.8 mA test current with tab temperature maintained at 30°C for 20 seconds prior to reading.
How is the cathode identified on 1PMT5931B?
The cathode of the 1PMT5931B is unambiguously designated by TAB 1, which is the full metallic bottom surface of the Powermite® package. This tab serves as both the cathode electrical connection and the primary thermal conduction path to the PCB.
What is the maximum power dissipation of 1PMT5931B and under what conditions?
The 1PMT5931B is rated for 3.0 W DC power dissipation when TAB 1 is maintained at ≤60°C. This rating accounts for voltage rise at higher currents and temperatures. Derating is required above 60°C tab temperature per the device's 30°C/W thermal resistance specification.
Does 1PMT5931B meet industry ESD standards?
Yes, the 1PMT5931B is rated for >16 kV per Human Body Model (HBM), exceeding typical IEC 61000-4-2 Level 4 requirements. This robustness is inherent to the Powermite® package construction and supports reliable handling and field operation in noisy industrial environments.
Can 1PMT5931B be used in automated SMT assembly?
Yes, the 1PMT5931B is fully compatible with automated insertion equipment and standard SMT reflow processes. Its Powermite® package features consistent dimensions, tab-1 cathode marking, and a full metallic bottom that prevents flux entrapment-ensuring high first-pass yield in high-volume manufacturing.
1PMT5931/TR13 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
1PMT5931/TR13 FAQ
1.How can I place an order for 1PMT5931/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5931/TR13 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 1PMT5931/TR13 reliable?
The price and inventory of 1PMT5931/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5931/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5931/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5931/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5931/TR13?
1PMT5931/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5931/TR13 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 1PMT5931/TR13?
For technical support, including 1PMT5931/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5931/TR13 requirements.
6.How does Aetrix verify that 1PMT5931/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5931/TR13 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 1PMT5931/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5931/TR13?
All 1PMT5931/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5931/TR13, 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 1PMT5931/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5931/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5931/TR13 Tags
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