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Microchip Technology 1PMT5937C/TR13
- Part No.:
- 1PMT5937C/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5937C/TR13.pdf
- Description:
- DIODE ZENER 33V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,505
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Product details
Overview
1PMT5937C/TR13 from Microsemi is a 33 V, ±1% 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 reverse leakage at 25.1 V. It serves as a precision voltage reference or overvoltage clamp in power supply regulation circuits.
For engineers reviewing the 1PMT5937C/TR13 datasheet, 1PMT5937C/TR13 pinout, 1PMT5937C/TR13 application, or 1PMT5937C/TR13 equivalent, key selection criteria include tight voltage tolerance (±1%), low knee impedance (800 Ω), ESD rating >16 kV HBM, thermal resistance of 30°C/W junction-to-TAB, and compatibility with EIA-481 tape-and-reel automated assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and line 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 a well-defined Zener knee at IZK = 0.25 mA with ZZK = 800 Ω, and specified dynamic impedance ZZT = 33 Ω at IZT = 11.4 mA. Reverse leakage remains ≤1 µA up to VR = 25.1 V, supporting reliable clamping in low-power protection schemes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 33 V ±1% - enables precise voltage reference or regulation within 0.33 V tolerance at 11.4 mA |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - supports high-energy transient suppression without derating in compact layouts |
| Dynamic Impedance | 33 Ω at IZT - ensures minimal output voltage variation under load current changes |
| Knee Impedance | 800 Ω at IZK = 0.25 mA - defines low-current regulation onset for standby-mode protection |
| Reverse Leakage | ≤1 µA at VR = 25.1 V - guarantees negligible quiescent current in always-on clamp circuits |
| Thermal Resistance | 30°C/W junction-to-TAB - allows direct thermal coupling to PCB ground plane for sustained 3 W operation |
| ESD Rating | >16 kV HBM - provides robust handling immunity during SMT assembly and board-level integration |
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; mounting position unrestricted.
| 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 3.0 W dissipation |
| Lead 2 | Anode | Standard anode terminal; electrically isolated from TAB 1; used for circuit return path |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow while delivering 3.0 W capability in footprint smaller than DO-214AC |
| Integral heat sink locking tab | Provides mechanical retention during reflow and reduces thermal resistance by direct metal-to-PCB conduction |
| Full metallic bottom | Eliminates solder flux entrapment risk-critical for high-reliability automotive and industrial assemblies |
| ±1% Zener voltage tolerance (suffix C) | Supports closed-loop feedback designs requiring tighter regulation than standard ±5% parts |
| ESD rating >16 kV HBM | Reduces need for external ESD protection in input-stage clamp applications |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Precision Zener reference establishing error amplifier threshold at secondary-side TL431-like function. Use Value: ±1% tolerance ensures ±0.33 V regulation accuracy; 33 Ω dynamic impedance minimizes load-induced output drift. | Use Scenario: Clamping transient surges on 24 V industrial I/O lines exposed to inductive kickback. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy to ground before downstream logic ICs are damaged. Use Value: 3.0 W rating sustains 100 ms transients; >16 kV HBM withstands ESD events during field maintenance. |
| Low-Power Sensor Reference | Programmable Logic Controller Input Conditioning |
Use Scenario: Providing stable 33 V bias for high-impedance analog sensor excitation in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Low-leakage voltage reference sourcing microamp-level current with minimal self-heating. Use Value: ≤1 µA IR at 25.1 V preserves battery life; 30°C/W thermal resistance prevents thermal runaway at ambient ≤85°C. | Use Scenario: Level-shifting and overvoltage hardening of 24 V digital inputs in PLC backplanes. IC Role / Device Role / Timing Role: Front-end shunt clamp absorbing surge energy while preserving signal integrity for Schmitt-trigger receivers. Use Value: Locking tab ensures mechanical stability during vibration; metallic bottom prevents flux voids in high-volume wave-soldered assemblies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference and clamping applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5937B | Same 33 V nominal, ±5% tolerance, DO-41 through-hole package, 1.2 W rating | Lacks surface-mount compatibility and thermal performance; unsuitable for automated production or >1.2 W clamping | Select only for legacy through-hole designs where board real estate and power density are not constrained |
| BZX84-C33 | 33 V ±5%, SOT-23 package, 300 mW rating, 80 Ω dynamic impedance | Insufficient power handling for >300 mW transients; higher ZZT degrades regulation accuracy | Use only in ultra-low-power signal-level clamping-not for power rail protection or reference duties |
Compared with 1N5937B and BZX84-C33, the 1PMT5937C/TR13 delivers 2.5× higher power rating in SMT form, ±1% tolerance for precision regulation, and integrated thermal management-making it uniquely suited for modern high-density, high-reliability power interface designs.
Availability
1PMT5937C/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial overvoltage clamps, low-power sensor references, and PLC input conditioning requiring stable component supply and long-term manufacturability.
Supply support for 1PMT5937C/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 family was engineered to deliver high-power surface-mount voltage regulation in space-constrained environments where thermal performance and assembly reliability are critical.
FAQ
What is the Zener voltage tolerance for 1PMT5937C/TR13?
The "C" suffix in 1PMT5937C/TR13 denotes ±1% Zener voltage tolerance at 33 V nominal, verified per Microsemi's test conditions (IZT = 11.4 mA, TC = 30°C). This is tighter than the standard ±5% version (1PMT5937B/TR13) and supports precision regulation where absolute voltage accuracy is required in feedback networks or reference circuits.
How is thermal management handled in the 1PMT5937C/TR13 package?
The 1PMT5937C/TR13 uses the Powermite® package with TAB 1 as the cathode and primary thermal path. Its 30°C/W junction-to-TAB thermal resistance requires direct soldering of TAB 1 to a minimum 100 mm² copper thermal pad. This design enables full 3.0 W dissipation at TAB temperature ≤60°C-critical for sustained clamping in industrial power interfaces.
Is 1PMT5937C/TR13 compatible with automated SMT assembly processes?
Yes, 1PMT5937C/TR13 is fully compatible with automated insertion and reflow processes. Its Powermite® package features a locking tab for mechanical stability during pick-and-place, a full metallic bottom eliminating flux entrapment, and EIA-481 tape-and-reel packaging (13-inch reel, 12,000 units). These features ensure high first-pass yield in high-volume manufacturing.
What is the maximum reverse leakage current for 1PMT5937C/TR13?
The maximum reverse leakage current for 1PMT5937C/TR13 is 1 µA at VR = 25.1 V and TL = 30°C. This low leakage supports energy-efficient operation in always-on protection circuits and preserves accuracy in high-impedance reference applications where parasitic current paths could degrade performance.
Does 1PMT5937C/TR13 meet any ESD immunity standards?
Yes, 1PMT5937C/TR13 is rated for >16 kV per Human Body Model (HBM), as confirmed in the MSC0995 datasheet. This level of ESD robustness eliminates the need for additional input-stage protection in many industrial and instrumentation applications, simplifying BOM and improving layout efficiency around sensitive analog or digital inputs.
1PMT5937C/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):
- 33 V
- Tolerance:
- ±2%
- 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
1PMT5937C/TR13 FAQ
1.How can I place an order for 1PMT5937C/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5937C/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 1PMT5937C/TR13 reliable?
The price and inventory of 1PMT5937C/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5937C/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5937C/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5937C/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5937C/TR13?
1PMT5937C/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5937C/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 1PMT5937C/TR13?
For technical support, including 1PMT5937C/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5937C/TR13 requirements.
6.How does Aetrix verify that 1PMT5937C/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5937C/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 1PMT5937C/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5937C/TR13?
All 1PMT5937C/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5937C/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 1PMT5937C/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5937C/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5937C/TR13 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
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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