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Microchip Technology 1PMT5938A/TR7
- Part No.:
- 1PMT5938A/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5938A/TR7.pdf
- Description:
- DIODE ZENER 36V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,116
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Product details
Overview
1PMT5938A/TR7 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 and regulator feedback networks.
For engineers reviewing the 1PMT5938A/TR7 datasheet, 1PMT5938A/TR7 pinout, 1PMT5938A/TR7 application, or 1PMT5938A/TR7 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (30°C/W junction-to-TAB), ESD robustness (>16 kV HBM), low knee impedance, and compatibility with automated SMT assembly using EIA-481 tape-and-reel packaging.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage regulation under varying load and temperature conditions. Its Powermite® package integrates a full metallic bottom and locking tab that functions as both mechanical anchor and thermal path to PCB copper, enabling efficient heat transfer from junction to TAB 1.
The device exhibits tight voltage control at IZT = 10.4 mA with ZZT = 38 Ω and ZZK = 0.25 Ω, supporting low-noise reference applications. Reverse leakage remains below 1 µA up to VR = 27.4 V, ensuring minimal standby current in clamping configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V ±5% at IZT = 10.4 mA - defines regulated output voltage in shunt regulator or reference circuits |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - sets maximum continuous power handling with defined thermal boundary condition |
| Dynamic Impedance | 38 Ω at IZT - determines voltage variation under small-signal AC load changes |
| Knee Impedance | 0.25 Ω - indicates low-impedance behavior near breakdown onset, critical for soft-clamp performance |
| Reverse Leakage | <1 µA at VR = 27.4 V - ensures negligible quiescent current in high-impedance sensing or battery-backed circuits |
| Thermal Resistance | 30°C/W junction-to-TAB 1 - quantifies thermal path efficiency for PCB copper heatsinking |
| ESD Rating | >16 kV per Human Body Model - supports robust handling and operation in unshielded industrial environments |
Pinout & Package
The 1PMT5938A/TR7 uses a 2-terminal DO-216 surface-mount package with cathode designated by TAB 1. The full metallic bottom provides solderable thermal and electrical contact to PCB ground or heatsink plane.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary thermal and electrical connection point; must be soldered to copper area for rated 3.0 W dissipation |
| Opposite Pad | Anode | Standard anode terminal; polarity confirmed by cathode marking on device body |
Key Features
| Feature | Design Value |
|---|---|
| Integral Heat Sink Locking Tab | Mechanically anchors device during reflow while conducting heat directly from junction to PCB copper |
| Full Metallic Bottom | Eliminates solder flux entrapment risk and ensures consistent thermal interface without voids |
| EIA-481 Tape & Reel Packaging | Enables direct use with high-speed pick-and-place equipment (7″ reel: 3,000 pcs; 13″ reel: 12,000 pcs) |
| Low Knee Impedance | 0.25 Ω enables stable regulation even at currents well below IZT, improving low-power reference accuracy |
| High ESD Robustness | >16 kV HBM rating reduces need for external protection in field-deployed instrumentation interfaces |
Applications
| Industrial Sensor Signal Conditioning | DC-DC Converter Feedback Reference |
|---|---|
Use Scenario: Stabilizing reference voltage for 4–20 mA transmitter analog front-ends exposed to 48 V supply transients. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 36 V clamp to protect op-amp inputs and ADC references. Use Value: Maintains signal integrity under load dump events due to low ZZK (0.25 Ω) and high power margin (3.0 W). | Use Scenario: Setting output voltage in isolated flyback converters where primary-side regulation requires accurate secondary-side feedback. IC Role / Device Role / Timing Role: Zener-based voltage reference tied to optocoupler LED anode to regulate output via primary controller. Use Value: Enables stable 36 V reference with <1 µA leakage, minimizing optocoupler current error and improving cross-regulation. |
| Automotive Body Control Module Clamp | Programmable Logic Controller Input Protection |
Use Scenario: Protecting microcontroller GPIO pins connected to 24 V CAN bus auxiliary sensors against load dump surges. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping induced spikes to safe levels before reaching logic inputs. Use Value: Delivers >16 kV HBM ESD immunity and 3.0 W surge energy absorption without derating at 125°C ambient. | Use Scenario: Safeguarding digital input channels in PLC modules receiving 24 V DC field signals subject to inductive kickback. IC Role / Device Role / Timing Role: Bidirectional overvoltage clamp limiting input voltage to 36 V while maintaining high-impedance state below threshold. Use Value: Achieves fast response with 38 Ω ZZT and reliable long-term stability due to hermetically molded Powermite® construction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5938A | Same 36 V Zener voltage and ±5% tolerance, but in DO-41 through-hole package; no metallic thermal tab; 1.5 W rating | Requires PCB hole drilling and wave soldering; unsuitable for high-density SMT layouts or thermal-critical designs | Select only when legacy through-hole assembly or lower power (≤1.5 W) operation is acceptable |
| BZX84-C36 | SOT-23 package; 36 V nominal, ±5%; 300 mW rating; 80 Ω ZZT; no specified ESD rating | Limited to low-power signal-level clamping; lacks thermal performance and ruggedness for industrial power rail use | Use only in space-constrained, low-energy circuits where 3.0 W capability and >16 kV ESD are not required |
Compared with 1N5938A and BZX84-C36, the 1PMT5938A/TR7 delivers 2× higher power handling, integrated thermal management via TAB 1, and certified ESD robustness-making it uniquely suited for automotive and industrial SMT applications demanding reliability under thermal and electrical stress.
Availability
1PMT5938A/TR7 is available at Aetrix Electronics and suitable for industrial sensor conditioning, DC-DC converter feedback, automotive body control module protection, and PLC input protection requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for 1PMT5938A/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 family-including 1PMT5938A/TR7-is engineered for high-power density surface-mount voltage regulation and transient suppression in thermally constrained, high-reliability systems.
FAQ
What is the Zener voltage tolerance for 1PMT5938A/TR7?
The 1PMT5938A/TR7 has a standard Zener voltage tolerance of ±5% at 36 V, measured at IZT = 10.4 mA with TAB 1 held at 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D respectively, but the base part number 1PMT5938A/TR7 specifies ±5%.
How is thermal performance defined for 1PMT5938A/TR7?
Thermal performance of the 1PMT5938A/TR7 is specified as 30°C/W junction-to-TAB 1. This means the device achieves its full 3.0 W power rating only when TAB 1 is maintained at ≤60°C-requiring adequate PCB copper area and thermal vias to dissipate heat effectively in real-world layouts.
Is 1PMT5938A/TR7 compatible with automated SMT assembly?
Yes, the 1PMT5938A/TR7 is fully compatible with automated SMT assembly. It ships in EIA-481 compliant tape-and-reel format (3,000 pcs per 7″ reel), features a locking tab for secure placement, and has a full metallic bottom that prevents solder flux entrapment-ensuring high first-pass yield in high-volume manufacturing.
What is the maximum reverse voltage before breakdown for 1PMT5938A/TR7?
The maximum reverse voltage before significant conduction in the 1PMT5938A/TR7 is 27.4 V, at which point reverse leakage is guaranteed ≤1 µA. Breakdown begins near this voltage, with nominal Zener regulation established at 36 V under 10.4 mA test current (IZT).
Does 1PMT5938A/TR7 meet automotive-grade reliability standards?
The 1PMT5938A/TR7 is qualified for operation from –55°C to +150°C junction temperature and rated for >16 kV ESD (HBM), making it suitable for under-hood and industrial control applications. While not AEC-Q200 certified out-of-box, its construction and specifications align with Tier-1 automotive subsystem requirements when validated in system-level testing.
1PMT5938A/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):
- 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/TR7 FAQ
1.How can I place an order for 1PMT5938A/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5938A/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 1PMT5938A/TR7 reliable?
The price and inventory of 1PMT5938A/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5938A/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5938A/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5938A/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5938A/TR7?
1PMT5938A/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5938A/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 1PMT5938A/TR7?
For technical support, including 1PMT5938A/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5938A/TR7 requirements.
6.How does Aetrix verify that 1PMT5938A/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5938A/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 1PMT5938A/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5938A/TR7?
All 1PMT5938A/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5938A/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 1PMT5938A/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5938A/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5938A/TR7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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SMAJ4744A-TP
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