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Microchip Technology 1PMT5938A/TR13
- Part No.:
- 1PMT5938A/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5938A/TR13.pdf
- Description:
- DIODE ZENER 36V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,770
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Product details
Overview
1PMT5938A/TR13 from Microsemi is a 36 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 10.4 mA test current (IZT), 38 Ω dynamic impedance (ZZT), and <1 µA reverse leakage at 27.4 V. It serves as a precision voltage reference or overvoltage clamp in compact DC power rails.
For engineers reviewing the 1PMT5938A/TR13 datasheet, 1PMT5938A/TR13 pinout, 1PMT5938A/TR13 application, or 1PMT5938A/TR13 equivalent, key selection criteria include zener voltage tolerance, thermal resistance (30°C/W junction-to-TAB), ESD rating (>16 kV HBM), low knee impedance, and compatibility with automated SMT assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage regulation across varying load currents. Its Powermite® package features a full metallic bottom and integral locking tab that functions as both mechanical anchor and heat sink, enabling direct thermal conduction from junction to PCB copper via TAB 1.
The device exhibits tight voltage control under defined test conditions: VZ measured at IZT = 10.4 mA with case temperature TL = 30°C, and dynamic impedance ZZT derived using 60 Hz AC superimposed on IZT. Reverse leakage IR remains ≤1 µA up to VR = 27.4 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V ±5% - defines regulated output voltage under nominal bias; critical for reference accuracy in feedback loops |
| Test Current (IZT) | 10.4 mA - standardized operating point for VZ measurement; ensures repeatable characterization |
| Dynamic Impedance (ZZT) | 38 Ω - indicates small-signal AC resistance near IZT; lower value improves regulation against current transients |
| Max Power Dissipation | 3.0 W at TAB 1 = 60°C - sets thermal design boundary; requires adequate copper area for heat spreading |
| Junction-to-TAB Thermal Resistance | 30°C/W - quantifies thermal path efficiency from die to mounting tab; enables thermal modeling of PCB layout |
| ESD Rating (HBM) | >16 kV - supports robust handling in automated manufacturing without additional protection circuitry |
| Reverse Leakage (IR) | ≤1 µA at VR = 27.4 V - ensures minimal quiescent current in standby or high-impedance sensing nodes |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral locking tab; cathode designated by TAB 1; weight ≈ 0.016 g; compliant with EIA-481 tape-and-reel standard (13-inch reel: 12,000 pcs).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat-sinking terminal and electrical cathode connection; must be soldered to thermal pad for rated power handling |
| Lead 2 | Anode | Standard anode terminal; mounted opposite TAB 1; no thermal function |
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-214AC |
| Integral heat-sink locking tab | TAB 1 provides mechanical retention during insertion and direct thermal path to PCB copper, reducing junction temperature rise |
| Full metallic bottom | Eliminates solder flux entrapment risk during reflow, improving long-term reliability and void-free solder joints |
| ESD robustness | >16 kV HBM rating allows safe handling in unshielded production environments without extra ESD mitigation |
| Low knee impedance | ZZK = 0.25 Ω at IZK = 0.25 mA - ensures stable regulation even at very low bias currents typical in battery-powered circuits |
Applications
| DC Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated flyback or buck converter secondary-side regulation. IC Role / Device Role / Timing Role: Zener reference providing precise 36 V threshold for optocoupler-driven error amplifier. Use Value: ±5% VZ tolerance and 38 Ω ZZT ensure consistent loop gain and transient response across temperature and line variations. | Use Scenario: Clamping surge-induced voltage spikes on 24 V industrial I/O lines. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy to ground when input exceeds 36 V. Use Value: 3.0 W power rating and 30°C/W thermal resistance allow sustained clamping without thermal runaway under repetitive 100 ns/1 kV transients. |
| Low-Power Sensor Reference | Automated Test Equipment (ATE) Biasing |
Use Scenario: Providing stable excitation voltage for RTD or bridge sensor interfaces in portable instrumentation. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) voltage reference source for high-impedance analog front-end inputs. Use Value: Minimal IR ensures <0.1% error contribution in 100 kΩ+ sensor legs, preserving measurement resolution. | Use Scenario: Generating calibrated bias points for DUT power rail validation in semiconductor ATE handlers. IC Role / Device Role / Timing Role: Precision shunt regulator establishing repeatable 36 V test voltage under programmable current loads. Use Value: Tight VZ tolerance and low ZZT enable <±0.5% output variation across 1–10 mA load steps, meeting Class II ATE accuracy requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5357B | Same 36 V nominal VZ, but DO-204AL (DO-41) through-hole package; 5 W rating; higher thermal resistance (~65°C/W) | Requires manual or wave-solder assembly; unsuitable for high-density SMT layouts | Select when legacy through-hole compatibility or higher peak pulse power is required |
| BZX84-C36 | SOT-23 package; 36 V VZ; 300 mW rating; 100 Ω ZZT; no integral heat sink | Limited to low-power signal-level clamping; cannot sustain 3.0 W continuous dissipation | Select only for space-constrained, low-current (<50 mA) bias or protection roles |
Compared with 1N5357B and BZX84-C36, the 1PMT5938A/TR13 uniquely delivers 3.0 W SMT power handling with optimized thermal path via TAB 1, making it the only option among the three suitable for high-reliability, thermally demanding 36 V regulation in automated production.
Availability
1PMT5938A/TR13 is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection circuits, and low-power sensor reference designs requiring stable component supply and traceable sourcing.
Supply support for 1PMT5938A/TR13 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 designed to deliver high-power surface-mount voltage regulation in ultra-compact packages, targeting space-constrained and thermally demanding applications where traditional axial or larger SMT devices fall short.
FAQ
What is the zener voltage tolerance for 1PMT5938A/TR13?
The 1PMT5938A/TR13 has a standard zener voltage tolerance of ±5% at 36 V, measured at IZT = 10.4 mA and case temperature TL = 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D respectively, but the base part number 1PMT5938A/TR13 specifies ±5%.
How is thermal management handled in the 1PMT5938A/TR13 package?
The 1PMT5938A/TR13 uses its metallic TAB 1 as the primary thermal interface, with a specified junction-to-TAB thermal resistance of 30°C/W. Effective cooling requires soldering TAB 1 to a minimum 100 mm² copper pad on the PCB; this configuration enables the full 3.0 W power rating at TAB temperature ≤60°C.
Can 1PMT5938A/TR13 be used in automated SMT assembly?
Yes, the 1PMT5938A/TR13 is explicitly designed for compatibility with automatic insertion and reflow soldering equipment. Its Powermite® package includes a locking tab and full metallic bottom to prevent flux entrapment and ensure reliable placement and solder joint formation per EIA-481 tape-and-reel standards.
What is the maximum reverse leakage current for 1PMT5938A/TR13?
The maximum reverse leakage current (IR) for 1PMT5938A/TR13 is 1 µA at a reverse voltage (VR) of 27.4 V, tested at TL = 30°C. This low leakage supports high-impedance applications such as precision sensor biasing and battery-monitoring circuits where quiescent current must be minimized.
Is the 1PMT5938A/TR13 RoHS compliant?
While the original MSC0995.PDF datasheet predates RoHS enforcement, Microsemi's Powermite® family-including the 1PMT5938A/TR13-was transitioned to RoHS-compliant materials prior to Microchip's acquisition. Current production lots meet RoHS Directive 2011/65/EU and are lead-free, halogen-free, and compatible with standard Pb-free reflow profiles.
1PMT5938A/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):
- 36 V
- Tolerance:
- ±10%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 38 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 27.4 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
1PMT5938A/TR13 FAQ
1.How can I place an order for 1PMT5938A/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5938A/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 1PMT5938A/TR13 reliable?
The price and inventory of 1PMT5938A/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5938A/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5938A/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5938A/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5938A/TR13?
1PMT5938A/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5938A/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 1PMT5938A/TR13?
For technical support, including 1PMT5938A/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5938A/TR13 requirements.
6.How does Aetrix verify that 1PMT5938A/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5938A/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 1PMT5938A/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5938A/TR13?
All 1PMT5938A/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5938A/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 1PMT5938A/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5938A/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5938A/TR13 Tags
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