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Microchip Technology 1PMT5937E3/TR7
- Part No.:
- 1PMT5937E3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5937E3/TR7.pdf
- Description:
- DIODE ZENER 33V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,010
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Product details
Overview
1PMT5937E3/TR7 from Microsemi is a 33 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 11.4 mA test current, 33 Ω dynamic impedance, and 1 µA max reverse leakage at 25.1 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails and regulator feedback paths.
For engineers reviewing the 1PMT5937E3/TR7 datasheet, 1PMT5937E3/TR7 pinout, 1PMT5937E3/TR7 application, or 1PMT5937E3/TR7 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 using EIA-481 tape-and-reel packaging.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across its specified test current range. Its Powermite® package integrates a full metallic bottom and locking tab to enhance thermal conduction and mechanical stability during reflow soldering.
The device exhibits low reverse leakage (≤1 µA at VR = 25.1 V), a knee impedance of ≤800 Ω, and maintains stable regulation under transient load conditions due to its 33 Ω dynamic impedance at IZT = 11.4 mA and TL = 30°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 33 V ±5% - precise clamping/reference level at 11.4 mA, suitable for 3.3 V–5 V system rail monitoring |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient suppression without external heatsink |
| Dynamic Impedance | 33 Ω at IZT - ensures minimal output voltage shift under varying load currents |
| Reverse Leakage | ≤1 µA at 25.1 V - guarantees low standby power loss in battery-backed circuits |
| Thermal Resistance | 30°C/W junction-to-TAB - supports reliable operation up to +150°C junction temperature |
| ESD Rating | >16 kV HBM - provides robust handling immunity during board assembly and field operation |
| Knee Impedance | ≤800 Ω - ensures stable regulation even near minimum operating current (IZK = 0.25 mA) |
Pinout & Package
Package: Powermite® (DO-216AA), molded surface-mount package with full metallic bottom and integral heat-sink locking tab; cathode designated by TAB 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat path and electrical cathode connection; must be soldered to PCB copper pour for thermal management |
| Lead 2 | Anode | Standard anode terminal; mounted opposite TAB 1, compatible with standard SMT pick-and-place nozzles |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated assembly and eliminates flux entrapment via full metallic bottom |
| Integral heat-sink locking tab | Reduces thermal resistance by anchoring TAB 1 directly to PCB copper, improving power handling reliability |
| Low reverse leakage (≤1 µA) | Minimizes quiescent current draw in always-on monitoring circuits and low-power IoT nodes |
| Tight zener tolerance (±5%) | Supports accurate voltage reference design without post-production trimming or calibration |
| ESD robustness (>16 kV HBM) | Eliminates need for external ESD protection in front-end power conditioning stages |
Applications
| DC Power Rail Clamping | Feedback Reference in SMPS |
|---|---|
Use Scenario: Protecting 3.3 V or 5 V microcontroller I/O lines from ESD or surge events exceeding rail voltage. IC Role / Device Role / Timing Role: Zener clamping diode placed between signal line and ground or rail. Use Value: Limits transient voltage to ≤33 V while dissipating up to 3.0 W, preventing latch-up or gate oxide damage. | Use Scenario: Providing stable reference voltage to the error amplifier in isolated flyback or forward converter feedback networks. IC Role / Device Role / Timing Role: Precision voltage reference source setting output regulation point. Use Value: ±5% tolerance and low dynamic impedance ensure <±1% output voltage drift over line/load/temperature. |
| Overvoltage Protection Circuit | Industrial Sensor Signal Conditioning |
Use Scenario: Safeguarding analog input channels of PLC modules against accidental 24 V field wiring faults. IC Role / Device Role / Timing Role: Primary overvoltage clamp in series with TVS or current-limiting resistor. Use Value: 33 V breakdown threshold aligns with common industrial supply margins; 3.0 W rating handles sustained fault energy. | Use Scenario: Stabilizing excitation voltage for resistive bridge sensors (e.g., strain gauges) in harsh environments. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage reference for ratiometric measurement systems. Use Value: ≤1 µA reverse leakage avoids loading sensitive sensor bridges; 30°C/W thermal resistance prevents self-heating errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5937B | Same 33 V zener voltage, but in DO-41 through-hole package; higher thermal resistance (~65°C/W), no metallic bottom | Requires manual or wave soldering; unsuitable for high-density SMT layouts or automated production | Select 1PMT5937E3/TR7 when SMT assembly, thermal performance, or space constraints are critical |
| BZX84-C33 | 33 V SOT-23 Zener; 300 mW rating, 10x lower power handling; 500 Ω typical ZZT; 100 nA IR | Limited to low-energy signal-level clamping; cannot replace 1PMT5937E3/TR7 in power rail protection | Choose BZX84-C33 only for low-current biasing or logic-level voltage limiting where 3.0 W capability is unnecessary |
Compared with 1N5937B and BZX84-C33, the 1PMT5937E3/TR7 uniquely combines high-power SMT packaging, low thermal resistance, and industrial-grade ESD robustness-making it the only option among the three qualified for 3.0 W transient suppression in automated production environments.
Availability
1PMT5937E3/TR7 is available at Aetrix Electronics and suitable for DC power rail clamping, SMPS feedback referencing, and industrial overvoltage protection requiring stable component supply and consistent tape-and-reel delivery.
Supply support for 1PMT5937E3/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 1PMT5937E3/TR7-is engineered for high-power surface-mount voltage regulation and transient suppression in mission-critical power systems where thermal performance and assembly reliability are essential.
FAQ
What is the zener voltage tolerance for 1PMT5937E3/TR7?
The 1PMT5937E3/TR7 has a nominal zener voltage of 33 V with a standard tolerance of ±5%, measured at 11.4 mA test current and TAB 1 temperature of 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D, respectively, but the E3/TR7 variant uses the standard ±5% grade.
How is thermal management handled in the 1PMT5937E3/TR7 package?
The 1PMT5937E3/TR7 uses the Powermite® package with a full metallic bottom and integral locking tab that serves as both cathode and primary thermal path. Its junction-to-TAB thermal resistance is 30°C/W, enabling efficient heat transfer to the PCB copper pour-critical for sustaining 3.0 W dissipation without external heatsinking.
Is 1PMT5937E3/TR7 compatible with automated SMT assembly processes?
Yes, the 1PMT5937E3/TR7 is supplied in EIA-481 compliant tape-and-reel format (7-inch reel: 3,000 pieces; 13-inch reel: 12,000 pieces) and features a unique locking tab geometry that ensures stable orientation and placement accuracy during high-speed pick-and-place operations.
What is the maximum reverse leakage current for 1PMT5937E3/TR7?
The maximum reverse leakage current for 1PMT5937E3/TR7 is 1 µA at a reverse voltage of 25.1 V and ambient temperature of 30°C. This low leakage supports energy-efficient designs in battery-powered or always-on monitoring applications where standby current must be minimized.
Does 1PMT5937E3/TR7 meet industrial ESD requirements?
Yes, the 1PMT5937E3/TR7 is rated for >16 kV per the Human Body Model (HBM), exceeding IEC 61000-4-2 Level 4 (8 kV contact / 15 kV air) requirements. This makes it suitable for use in industrial control equipment, automotive body electronics, and other environments subject to frequent electrostatic discharge events.
1PMT5937E3/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):
- 33 V
- Tolerance:
- ±20%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 33 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 25.1 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
1PMT5937E3/TR7 FAQ
1.How can I place an order for 1PMT5937E3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5937E3/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 1PMT5937E3/TR7 reliable?
The price and inventory of 1PMT5937E3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5937E3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5937E3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5937E3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5937E3/TR7?
1PMT5937E3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5937E3/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 1PMT5937E3/TR7?
For technical support, including 1PMT5937E3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5937E3/TR7 requirements.
6.How does Aetrix verify that 1PMT5937E3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5937E3/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 1PMT5937E3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5937E3/TR7?
All 1PMT5937E3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5937E3/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 1PMT5937E3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5937E3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5937E3/TR7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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