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Microchip Technology 1PMT5937BE3/TR7
- Part No.:
- 1PMT5937BE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5937BE3/TR7.pdf
- Description:
- DIODE ZENER 33V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,433
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Product details
Overview
1PMT5937BE3/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 (IZT), 33 Ω dynamic impedance (ZZT), 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 1PMT5937BE3/TR7 datasheet, 1PMT5937BE3/TR7 pinout, 1PMT5937BE3/TR7 application, or 1PMT5937BE3/TR7 equivalent, key selection criteria include Zener voltage accuracy, 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 device operates as a two-terminal voltage-regulating diode with sharp Zener breakdown at 33 V nominal. Its Powermite® package integrates a full metallic bottom and locking tab to enhance thermal conduction and mechanical stability during reflow soldering.
Electrical behavior is characterized at TL = 30°C with IZT = 11.4 mA; dynamic impedance is measured using 60 Hz RMS AC superimposed at 10% of IZT. Reverse leakage remains ≤1 µA up to VR = 25.1 V, supporting stable clamping in low-power protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V ±5% - defines precise clamping threshold for voltage regulation or transient suppression |
| Test Current (IZT) | 11.4 mA - operating point where VZ is specified; sets minimum bias for stable regulation |
| Dynamic Impedance (ZZT) | 33 Ω - low incremental resistance ensures minimal voltage shift under load variation |
| Max Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient handling without derating in compact layout |
| Thermal Resistance | 30°C/W junction-to-TAB - supports efficient heat transfer to PCB copper via metallic tab |
| ESD Rating | >16 kV HBM - provides robust handling integrity during automated manufacturing and board-level integration |
| Reverse Leakage (IR) | ≤1 µA at VR = 25.1 V - ensures negligible standby current in battery-powered or low-quiescent systems |
Pinout & Package
The 1PMT5937BE3/TR7 uses a DO-216–compatible Powermite® surface-mount package with cathode designated by TAB 1. The full metallic bottom and integral locking tab serve as both mechanical anchor and thermal path to PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary thermal and electrical connection point; must be soldered to copper pour for optimal power handling |
| Lead 2 | Anode | Standard anode terminal; mounted opposite TAB 1 on molded body; no polarity marking on body |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables high-density PCB layouts while delivering 3.0 W power capability traditionally found in larger through-hole packages |
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term solder joint reliability and process yield |
| Integral heat sink locking tab | Provides mechanical retention during automatic insertion and enhances thermal conduction to PCB ground plane |
| ESD robustness >16 kV HBM | Reduces risk of field failure due to handling or system-level ESD events without external protection circuitry |
| Tight voltage tolerance option | ±5% standard; ±2% (suffix C) and ±1% (suffix D) available for high-accuracy reference applications |
Applications
| Power Supply Voltage Reference | Overvoltage Clamp in DC-DC Converters |
|---|---|
Use Scenario: Stabilizing feedback node in isolated flyback or buck-boost converters requiring accurate 33 V reference. IC Role / Device Role / Timing Role: Zener diode providing fixed voltage reference for optocoupler-based feedback loop. Use Value: Maintains output regulation within ±5% across temperature and line variations due to low ZZT and stable VZ drift. | Use Scenario: Protecting gate drivers or controller ICs from transient overvoltage spikes on 24 V or 36 V rails. IC Role / Device Role / Timing Role: Shunt clamping element diverting excess energy to ground when rail exceeds 33 V. Use Value: Absorbs 3.0 W peak power without thermal runaway, enabled by 30°C/W junction-to-TAB thermal path. |
| Industrial Sensor Signal Conditioning | Automotive Body Control Module Protection |
Use Scenario: Biasing and limiting analog sensor outputs (e.g., pressure transducers) before ADC input stages. IC Role / Device Role / Timing Role: Precision clamping diode ensuring signal stays within 0–33 V range to prevent ADC saturation. Use Value: Low 1 µA IR at 25.1 V prevents loading of high-impedance sensor sources while maintaining fast response. | Use Scenario: Suppressing load-dump transients on 12 V/24 V vehicle subsystems per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Primary shunt protector on microcontroller supply lines in BCM modules. Use Value: >16 kV HBM rating withstands ESD events during assembly; metallic tab ensures reliable thermal coupling to chassis ground. |
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 ±5%, but in DO-41 through-hole package; higher thermal resistance (~65°C/W), no metallic tab | Suitable for prototyping or low-volume through-hole designs; not compatible with SMT automation | Select 1N5937B only if manual assembly or legacy board compatibility is required |
| BZX55C33 | 33 V ±5%, DO-35 package; 500 mW rating, 100 Ω ZZT, no ESD rating specified | Limited to low-power signal-level clamping; insufficient for 3 W transient absorption | Choose BZX55C33 only for cost-sensitive, non-critical signal conditioning where power handling is not required |
Compared with 1N5937B and BZX55C33, the 1PMT5937BE3/TR7 delivers superior thermal performance (30°C/W vs. ≥65°C/W), automated assembly readiness, and verified >16 kV ESD robustness-making it the preferred choice for production-grade SMT power regulation and protection.
Availability
1PMT5937BE3/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and sensor interface circuits requiring stable component supply and high-reliability Zener clamping.
Supply support for 1PMT5937BE3/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 product line was designed for high-power density surface-mount voltage regulation and transient suppression in space-constrained, thermally demanding applications.
FAQ
What is the Zener voltage tolerance for 1PMT5937BE3/TR7?
The 1PMT5937BE3/TR7 has a standard Zener voltage tolerance of ±5% at 33 V, measured at IZT = 11.4 mA and TAB temperature of 30°C. Tighter tolerances of ±2% (suffix C) and ±1% (suffix D) are available upon request, but the base part number 1PMT5937BE3/TR7 reflects the ±5% grade.
How is thermal performance specified for 1PMT5937BE3/TR7?
The 1PMT5937BE3/TR7 has a junction-to-TAB thermal resistance of 30°C/W, meaning each watt of dissipated power raises the junction temperature 30°C above the TAB temperature. This value assumes direct soldering of TAB 1 to a sufficient copper area, and is critical for calculating safe operating limits in continuous or pulsed power applications.
Is 1PMT5937BE3/TR7 compatible with lead-free reflow processes?
Yes, the 1PMT5937BE3/TR7 is qualified for lead-free reflow soldering per JEDEC J-STD-020. Its Powermite® package withstands peak temperatures up to 260°C, and the full metallic bottom ensures uniform thermal distribution and minimizes voiding during reflow-key for high-yield SMT production.
What does the 'E3/TR7' suffix indicate in 1PMT5937BE3/TR7?
The 'E3' denotes compliance with RoHS Directive 2011/65/EU (lead-free, halogen-free), and 'TR7' specifies tape-and-reel packaging per EIA-481 standard, with 3,000 units per 7-inch reel. This configuration supports automated pick-and-place placement and ensures moisture sensitivity level (MSL) compliance for factory floor handling.
Can 1PMT5937BE3/TR7 be used as a replacement for older 1N5937B diodes?
While electrically similar in Zener voltage and tolerance, the 1PMT5937BE3/TR7 is not a drop-in replacement for the through-hole 1N5937B due to its surface-mount Powermite® package and different thermal profile. PCB redesign is required to accommodate the DO-216 footprint and TAB 1 thermal pad, though functional equivalence holds in regulated voltage and clamping roles.
1PMT5937BE3/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:
- ±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
1PMT5937BE3/TR7 FAQ
1.How can I place an order for 1PMT5937BE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5937BE3/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 1PMT5937BE3/TR7 reliable?
The price and inventory of 1PMT5937BE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5937BE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5937BE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5937BE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5937BE3/TR7?
1PMT5937BE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5937BE3/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 1PMT5937BE3/TR7?
For technical support, including 1PMT5937BE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5937BE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5937BE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5937BE3/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 1PMT5937BE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5937BE3/TR7?
All 1PMT5937BE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5937BE3/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 1PMT5937BE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5937BE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5937BE3/TR7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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