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Microchip Technology 1PMT5931AE3/TR7
- Part No.:
- 1PMT5931AE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5931AE3/TR7.pdf
- Description:
- DIODE ZENER 18V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,007
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Product details
Overview
1PMT5931AE3/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-TAB1 - used for precision voltage regulation and overvoltage protection in compact DC-DC converter feedback loops.
For engineers reviewing the 1PMT5931AE3/TR7 datasheet, 1PMT5931AE3/TR7 pinout, 1PMT5931AE3/TR7 application, or 1PMT5931AE3/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 device operates as a two-terminal voltage reference with sharp breakdown knee and low dynamic impedance, enabling stable regulation under varying load conditions. Its full metallic bottom and integral heat-sink locking tab ensure reliable thermal transfer to PCB copper, supporting continuous 3.0 W operation when mounted on ≥1 sq-in copper area.
The 1PMT5931AE3/TR7 is specified at TL = 30°C with VZ measured 20 seconds after DC current application, and its 12 Ω ZZT is derived using 60 Hz RMS AC current equal to 10% of IZT - confirming suitability for low-noise analog references and transient clamping where impedance stability matters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 18 V ±5% at 20.8 mA - sets precise regulation point for feedback networks |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - requires thermal pad design with ≥1 sq-in copper for full rating |
| Dynamic Impedance | 12 Ω at IZT - ensures minimal output voltage shift under load transients |
| Knee Current | 0.25 mA - enables usable regulation down to ultra-low bias currents |
| Reverse Leakage | <1 µA at 13.7 V - critical for low-power standby circuits and battery-backed systems |
| Thermal Resistance | 30°C/W junction-to-TAB1 - defines temperature rise per watt, guiding heatsinking strategy |
| ESD Rating | >16 kV HBM - supports handling without special ESD controls in assembly |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral heat-sink locking tab; cathode designated by TAB 1; mounting position unrestricted; weight ≈ 0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary thermal path and electrical cathode connection; must be soldered to copper pour for rated power |
| Lead 2 | Anode | Standard anode terminal; no thermal function - routed as signal trace |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and eliminates through-hole drilling; footprint matches DO-216 outline |
| Integral heat-sink locking tab | Provides mechanical anchoring during reflow and enhances thermal conduction to PCB copper |
| Full metallic bottom | Prevents solder flux entrapment and ensures void-free solder joint for consistent thermal performance |
| ESD robustness >16 kV HBM | Reduces need for post-assembly ESD screening in high-volume manufacturing environments |
| Tight tolerance options (±1%, ±2%) | Available with suffix D/C - supports designs requiring tighter than ±5% regulation accuracy |
Applications
| DC-DC Converter Feedback | Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or forward converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Precision voltage reference establishing error amplifier setpoint. Use Value: 12 Ω dynamic impedance minimizes output ripple sensitivity to load steps; ±5% tolerance meets typical 5 V/12 V supply accuracy requirements. | Use Scenario: Protecting downstream logic inputs from transient surges on 15–24 V industrial I/O lines. IC Role / Device Role / Timing Role: Shunt clamp limiting voltage to 18 V before damage threshold of connected ICs. Use Value: 3.0 W rating sustains 100 ms surge events; <1 µA leakage avoids loading sensitive sensor outputs at rest. |
| Battery Management Reference | Low-Power Sensor Bias |
Use Scenario: Providing stable reference for ADC measurement of Li-ion cell voltage in portable equipment. IC Role / Device Role / Timing Role: Low-drift voltage source for ratiometric sensing with microamp-level quiescent current. Use Value: 0.25 mA knee current allows regulation even with µA-scale bias networks; 30°C/W thermal resistance prevents self-heating drift in sealed enclosures. | Use Scenario: Supplying bias voltage to MEMS pressure sensors operating from coin-cell batteries. IC Role / Device Role / Timing Role: Ultra-low-leakage shunt regulator maintaining fixed node voltage. Use Value: <1 µA reverse leakage at 13.7 V preserves battery life over multi-year deployments; surface-mount form factor fits space-constrained modules. |
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-204AL (DO-41) through-hole package; 3.0 W rating at 75°C ambient, not case temperature | Requires through-hole assembly; less suitable for high-density SMT layouts or automated insertion | Select 1N5351B only if legacy through-hole compatibility or higher ambient temp derating is required |
| BZX84-C18 | SOT-23 package; 300 mW rating; 18 V ±5%; 40 Ω dynamic impedance at 5 mA | Limited to low-power signal-level clamping; cannot sustain 3.0 W surges or continuous regulation loads | Choose BZX84-C18 for space-constrained signal conditioning where power dissipation <300 mW |
Compared with 1N5351B and BZX84-C18, the 1PMT5931AE3/TR7 delivers 3× higher power handling in SMT form, lower dynamic impedance for tighter regulation, and superior thermal coupling via metallic tab - making it optimal for power conversion and industrial clamping where reliability under sustained load matters.
Availability
1PMT5931AE3/TR7 is available at Aetrix Electronics and suitable for DC-DC converter feedback, overvoltage clamp, and battery management reference applications requiring stable component supply across automotive, industrial control, and medical power subsystems.
Supply support for 1PMT5931AE3/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, including 1PMT5931AE3/TR7, was engineered for high-power density voltage regulation in space-constrained, thermally demanding environments - targeting power supply feedback, surge protection, and precision reference use cases.
FAQ
What is the zener voltage tolerance for 1PMT5931AE3/TR7?
The 1PMT5931AE3/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 upon request. This tolerance directly impacts regulation accuracy in feedback loops and must be factored into worst-case output voltage error budgets for the 1PMT5931AE3/TR7.
How is thermal performance defined for 1PMT5931AE3/TR7?
The 1PMT5931AE3/TR7 specifies a thermal resistance of 30°C/W junction-to-TAB1, meaning each watt of dissipated power raises the junction temperature by 30°C above the TAB1 temperature. Its 3.0 W rating applies only when TAB1 is held at 60°C - requiring adequate PCB copper area (≥1 sq-in) and proper soldering to the metallic tab. Exceeding this condition risks thermal runaway and premature failure of the 1PMT5931AE3/TR7.
Can 1PMT5931AE3/TR7 replace through-hole Zeners like 1N5351B?
No direct drop-in replacement exists due to differing packages: 1PMT5931AE3/TR7 uses Powermite® SMT while 1N5351B is DO-41 through-hole. Though both are 18 V/3.0 W Zeners, their thermal derating curves and mounting methods differ significantly. Substituting 1PMT5931AE3/TR7 for 1N5351B requires PCB redesign to accommodate the SMT footprint and thermal pad - the 1PMT5931AE3/TR7 is not a mechanical or layout-compatible substitute.
What does the "E3/TR7" suffix mean in 1PMT5931AE3/TR7?
The "E3" denotes tape-and-reel packaging per EIA-481 standard, and "TR7" indicates a 7-inch reel containing 3,000 units. This packaging format ensures compatibility with automated pick-and-place equipment and supports high-volume SMT assembly. The "E3/TR7" suffix confirms factory-verified reel orientation, component count, and moisture sensitivity level (MSL) compliance - critical for managing the 1PMT5931AE3/TR7 in production environments.
Is 1PMT5931AE3/TR7 suitable for low-current bias applications?
Yes - the 1PMT5931AE3/TR7 has a knee current (IZK) of just 0.25 mA, allowing stable regulation well below its 20.8 mA test current. At currents as low as 100 µA, it maintains usable voltage reference behavior with predictable leakage (<1 µA at 13.7 V). This makes the 1PMT5931AE3/TR7 appropriate for micropower sensor bias, battery monitoring, and other ultra-low-quiescent-current applications where traditional Zeners fail to regulate.
1PMT5931AE3/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
1PMT5931AE3/TR7 FAQ
1.How can I place an order for 1PMT5931AE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5931AE3/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 1PMT5931AE3/TR7 reliable?
The price and inventory of 1PMT5931AE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5931AE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5931AE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5931AE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5931AE3/TR7?
1PMT5931AE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5931AE3/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 1PMT5931AE3/TR7?
For technical support, including 1PMT5931AE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5931AE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5931AE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5931AE3/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 1PMT5931AE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5931AE3/TR7?
All 1PMT5931AE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5931AE3/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 1PMT5931AE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5931AE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5931AE3/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
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BZX84C3V3LT1G
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