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Microchip Technology 1PMT5937B/TR13
- Part No.:
- 1PMT5937B/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5937B/TR13.pdf
- Description:
- DIODE ZENER 33V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,635
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Product details
Overview
1PMT5937B/TR13 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 (IZT), 33 Ω dynamic impedance (ZZT), and 1 µA max 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 1PMT5937B/TR13 datasheet, 1PMT5937B/TR13 pinout, 1PMT5937B/TR13 application, or 1PMT5937B/TR13 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (30°C/W junction-to-TAB), ESD rating (>16 kV HBM), low knee impedance (800 Ω at IZK = 0.25 mA), and compatibility with automated SMT assembly per EIA-481 tape-and-reel packaging.
Technical Context
This device operates as a silicon planar Zener diode optimized for stable voltage regulation under DC bias. Its DO-216 outline and full metallic bottom enable efficient heat transfer to the PCB via TAB 1, while the locking tab enhances mechanical retention during reflow. The 33 V nominal breakdown is specified at 11.4 mA with tight thermal control (TL = 30°C).
Electrical behavior follows standard Zener characteristics: low reverse leakage (≤1 µA at VR = 25.1 V), defined knee region (IZK = 0.25 mA, ZZK = 800 Ω), and predictable voltage drift with current deviation per Micro Note 202. It is not designed for AC signal clamping or high-frequency transient suppression.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V ±5% at IZT = 11.4 mA - defines stable regulation point for feedback loops |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - sets maximum continuous DC load capability with PCB heatsinking |
| Dynamic Impedance (ZZT) | 33 Ω at IZT - determines output voltage stability under load current variation |
| Knee Impedance (ZZK) | 800 Ω at IZK = 0.25 mA - indicates sharpness of breakdown onset for low-current regulation |
| Thermal Resistance | 30°C/W junction-to-TAB1 - quantifies temperature rise per watt dissipated into PCB copper |
| ESD Rating | >16 kV HBM - ensures robustness against handling-induced electrostatic discharge |
| Reverse Leakage | ≤1 µA at VR = 25.1 V - guarantees minimal quiescent current in standby regulation |
Pinout & Package
Package: Powermite® (DO-216) surface-mount molded case 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 path and electrical cathode connection; must be soldered to thermal pad for rated 3.0 W operation |
| Lead 2 | Anode | Standard anode terminal; electrically isolated from TAB 1; used for series connection in regulation paths |
Key Features
| Feature | Design Value |
|---|---|
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term solder joint reliability |
| Integral locking tab | Acts as mechanical anchor and secondary thermal path, enhancing board-level retention and heat spreading |
| EIA-481 tape-and-reel packaging | Enables direct use with high-speed pick-and-place equipment without manual handling or orientation errors |
| Wide Zener voltage range support | Same package supports 3.3–200 V variants (1PMT5913B–1PMT5956B), simplifying line-side inventory management |
Applications
| Industrial Power Supply Regulation | Automotive Body Control Module Reference |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Zener diode providing precise 33 V reference for TL431 or optocoupler bias networks. Use Value: Maintains ±5% output regulation across temperature (-55°C to +150°C junction range) with 30°C/W thermal resistance enabling compact heatsink-free layout. | Use Scenario: Overvoltage protection clamp on 24 V battery-sensed input rails in BCM microcontroller power domains. IC Role / Device Role / Timing Role: Shunt regulator clamping transients above 33 V to protect downstream LDOs and MCU I/O. Use Value: >16 kV HBM ESD rating and 1 µA leakage at 25.1 V ensure immunity to automotive load-dump spikes while minimizing standby current drain. |
| Medical Equipment Voltage Monitoring | Telecom Line Card Biasing |
Use Scenario: Precision threshold detection in analog front-end circuits monitoring auxiliary power rail health. IC Role / Device Role / Timing Role: Zener-based comparator reference ensuring accurate trip points for fault reporting logic. Use Value: 33 V ±5% tolerance and 33 Ω dynamic impedance guarantee repeatable 10 mV-level detection margins under varying load conditions. | Use Scenario: Generating stable bias voltage for RF amplifier bias networks in 48 V telecom line cards. IC Role / Device Role / Timing Role: Low-leakage shunt reference supplying clean 33 V to GaN FET gate drivers. Use Value: 0.016 g lightweight package and DO-216 footprint allow dense placement near RF stages without thermal interference. |
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 and ±5% tolerance, but in axial DO-41 package; no metallic bottom or locking tab; thermal resistance ~65°C/W | Requires through-hole assembly and external heatsinking for >1 W operation; unsuitable for high-density SMT layouts | Select when legacy through-hole design or lower-cost procurement outweighs thermal and automation advantages |
| BZX84-C33 | SOT-23 package; 33 V ±5%; 300 mW power rating; 85 Ω dynamic impedance; 150°C max junction temperature | Limited to low-power biasing due to 0.3 W rating; incompatible with 3.0 W regulation loads | Select only for space-constrained, sub-100 mA reference applications where thermal performance is secondary |
Compared with 1PMT5937B/TR13, 1N5937B trades SMT compatibility and thermal efficiency for legacy manufacturability, while BZX84-C33 sacrifices power handling and thermal resistance for ultra-small footprint-neither offers drop-in replacement capability without PCB redesign or derating.
Availability
1PMT5937B/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, medical voltage monitoring systems, and telecom line card biasing requiring stable component supply and consistent Zener voltage performance.
Supply support for 1PMT5937B/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 engineered for high-power surface-mount voltage regulation in thermally demanding environments, emphasizing robust thermal conduction, automated assembly readiness, and extended temperature operation.
FAQ
What is the Zener voltage tolerance and test condition for 1PMT5937B/TR13?
The 1PMT5937B/TR13 has a nominal Zener voltage of 33 V with a standard tolerance of ±5%, measured at a test current (IZT) of 11.4 mA with TAB 1 temperature held at 30°C. Voltage measurement must be performed within 20 seconds of applying DC current to avoid thermal drift effects. Tighter tolerances (±2% and ±1%) are available with suffixes C and D, respectively.
How is thermal management handled in the 1PMT5937B/TR13 Powermite® package?
The 1PMT5937B/TR13 uses its full metallic bottom and integral locking tab to conduct heat directly from the junction to the PCB copper via TAB 1. Its specified thermal resistance is 30°C/W junction-to-TAB1, enabling 3.0 W power dissipation when TAB 1 is maintained at ≤60°C. This eliminates need for external heatsinks in properly designed layouts with adequate copper area.
Is the 1PMT5937B/TR13 compatible with automated SMT assembly processes?
Yes, the 1PMT5937B/TR13 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 symmetric DO-216 outline with clear cathode marking (TAB 1). Its locking tab and flux-free metallic bottom ensure reliable placement, reflow wetting, and post-solder mechanical integrity in high-volume SMT lines.
What is the maximum reverse leakage current specification for 1PMT5937B/TR13?
The 1PMT5937B/TR13 specifies a maximum reverse leakage current (IR) of 1 µA at a reverse voltage (VR) of 25.1 V, measured at TL = 30°C. This low leakage ensures minimal standby power loss in voltage reference and clamping applications, supporting energy-sensitive designs such as battery-backed systems and always-on monitoring circuits.
Does the 1PMT5937B/TR13 meet any industry-standard ESD ratings?
Yes, the 1PMT5937B/TR13 is rated for >16 kV per the Human Body Model (HBM) ESD test method. This high level of electrostatic discharge immunity protects the device during handling, PCB assembly, and end-use in electrically noisy environments such as industrial controls and automotive electronics.
1PMT5937B/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:
- ±5%
- 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
1PMT5937B/TR13 FAQ
1.How can I place an order for 1PMT5937B/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5937B/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 1PMT5937B/TR13 reliable?
The price and inventory of 1PMT5937B/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5937B/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5937B/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5937B/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5937B/TR13?
1PMT5937B/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5937B/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 1PMT5937B/TR13?
For technical support, including 1PMT5937B/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5937B/TR13 requirements.
6.How does Aetrix verify that 1PMT5937B/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5937B/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 1PMT5937B/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5937B/TR13?
All 1PMT5937B/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5937B/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 1PMT5937B/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5937B/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5937B/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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