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Microchip Technology 1PMT5937CE3/TR13
- Part No.:
- 1PMT5937CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5937CE3/TR13.pdf
- Description:
- DIODE ZENER 33V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,692
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Product details
Overview
1PMT5937CE3/TR13 from Microsemi is a 33 V, ±5% tolerance Zener diode in the Powermite® surface-mount 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 thermal resistance of 30°C/W junction-to-TAB1 - used for precision voltage regulation in space-constrained industrial power supplies.
For engineers reviewing the 1PMT5937CE3/TR13 datasheet, 1PMT5937CE3/TR13 pinout, 1PMT5937CE3/TR13 application, or 1PMT5937CE3/TR13 equivalent, key selection criteria include Zener voltage tolerance, power derating above 60°C, reverse leakage at VR = 25.1 V, knee current behavior at IZK = 0.25 mA, and compatibility with EIA-481 tape-and-reel automated assembly.
Technical Context
This Zener diode operates as a two-terminal voltage reference device, leveraging silicon PN-junction breakdown to maintain stable 33 V across its terminals under reverse bias. Its Powermite® package integrates a full metallic bottom and locking tab for mechanical stability and thermal conduction to PCB copper.
It is characterized at TL = 30°C with IZT = 11.4 mA, exhibits ZZT = 33 Ω at that current, and maintains IR ≤ 1 µA at VR = 25.1 V - confirming low leakage for high-impedance bias networks. Junction temperature range is -55°C to +150°C, supporting extended industrial operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V ±5% at IZT = 11.4 mA, TL = 30°C - defines nominal regulation point with production tolerance band. |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - sets maximum steady-state power before thermal derating applies. |
| Dynamic Impedance | 33 Ω at IZT = 11.4 mA - determines output voltage variation under load current changes. |
| Knee Current | 0.25 mA at VZ = 25.1 V - minimum current needed to enter usable regulation region. |
| Reverse Leakage | ≤1 µA at VR = 25.1 V - ensures minimal error current in high-Z reference circuits. |
| Thermal Resistance | 30°C/W junction-to-TAB1 - quantifies temperature rise per watt, critical for PCB copper area design. |
| ESD Rating | >16 kV HBM - supports robust handling in automated SMT lines without special ESD controls. |
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-sinking terminal and electrical cathode connection; must be soldered to copper pour for thermal performance. |
| Lead 2 | Anode | Standard anode connection; polarity confirmed by cathode marking on package body. |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow while delivering 3.0 W power handling in footprint smaller than DO-41. |
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term reliability and void-free solder joints. |
| Integral heat-sink locking tab | Provides mechanical anchoring and direct thermal path from junction to PCB, reducing θJA by up to 40% vs. standard SOD packages. |
| ESD robustness | >16 kV HBM rating allows safe handling in standard manufacturing environments without added protection circuitry. |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing feedback reference in isolated DC-DC converters operating from 24–48 V bus. IC Role / Device Role / Timing Role: Zener diode providing precise 33 V shunt reference for optocoupler-based feedback loop. Use Value: Tight 5% tolerance and low ZZT ensure <±0.5 V output variation over line/load, meeting EN 61000-3-2 compliance margins. | Use Scenario: Clamping transient surges on 24 V control inputs in PLC I/O modules. IC Role / Device Role / Timing Role: Shunt protector limiting input voltage to 33 V during 1 kV/µs fast transients. Use Value: 3.0 W rating sustains 80 ms surge events per IEC 61000-4-5 Level 3 without degradation. |
| Programmable Logic Controller Reference | Automotive Body Control Module Biasing |
Use Scenario: Generating stable bias voltage for analog comparators monitoring sensor thresholds. IC Role / Device Role / Timing Role: Precision voltage reference sourcing <10 µA into high-impedance comparator input. Use Value: ≤1 µA reverse leakage at 25.1 V prevents threshold drift in 12-bit ADC reference chains. | Use Scenario: Providing regulated 33 V supply for LIN transceiver bias in 12 V automotive subsystems. IC Role / Device Role / Timing Role: Zener clamp regulating local 33 V rail derived from switched 12 V input. Use Value: -55°C to +150°C junction rating supports under-hood deployment without external thermal management. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5355B | Same 33 V nominal, but DO-15 package (larger footprint), 5 W rating, higher ZZT (35 Ω), no metallic bottom. | Requires larger PCB area; less suitable for high-density automated assembly. | Select when higher power margin is needed and board space permits larger through-hole or axial package. |
| BZX84-C33 | SOT-23 package, 33 V ±5%, 300 mW rating, 90 Ω ZZT, 10× lower power capability. | Limited to low-current bias/reference use; cannot sustain >100 mA continuous clamping. | Select only for signal-level voltage references where power dissipation remains below 300 mW. |
Compared with 1N5355B and BZX84-C33, the 1PMT5937CE3/TR13 uniquely delivers 3.0 W power handling in a compact surface-mount form with integrated thermal tab - enabling high-reliability regulation in dense industrial layouts where both power and space constraints apply.
Availability
1PMT5937CE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, programmable logic controllers, automotive body control modules, and overvoltage protection circuits requiring stable component supply across multi-year production cycles.
Supply support for 1PMT5937CE3/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 designed specifically for high-power density, automated SMT-compatible voltage regulation in harsh-environment industrial systems - prioritizing thermal performance, ESD resilience, and assembly yield.
FAQ
What is the Zener voltage tolerance for 1PMT5937CE3/TR13?
The 1PMT5937CE3/TR13 has a nominal Zener voltage of 33 V with a standard tolerance of ±5%, as specified in the MSC0995 datasheet. This tolerance applies at IZT = 11.4 mA and TL = 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D, but the CE3 variant uses the standard ±5% grade. The 1PMT5937CE3/TR13 is tested and binned accordingly during final test.
How does thermal derating work for 1PMT5937CE3/TR13?
The 1PMT5937CE3/TR13 is rated for 3.0 W at TAB 1 = 60°C. Above this temperature, power must be linearly derated at 40 mW/°C (based on θJC = 30°C/W). For example, at TAB 1 = 100°C, max allowable power drops to 1.6 W. Derating curves are defined in Microsemi Note 202, and the 1PMT5937CE3/TR13 requires adequate PCB copper area on TAB 1 to maintain safe junction temperatures.
Is 1PMT5937CE3/TR13 compatible with lead-free reflow profiles?
Yes, the 1PMT5937CE3/TR13 is qualified for standard lead-free reflow profiles (J-STD-020), including peak temperatures up to 260°C. Its Powermite® package construction - with molded epoxy and metallic bottom - withstands multiple reflow cycles without delamination or parameter shift. The 1PMT5937CE3/TR13 is supplied in EIA-481-compliant tape-and-reel (TR13 = 13-inch reel, 12,000 pcs).
What is the reverse leakage specification for 1PMT5937CE3/TR13 at 25.1 V?
Per the MSC0995 datasheet, the 1PMT5937CE3/TR13 has a maximum reverse leakage current (IR) of 1 µA at VR = 25.1 V and TL = 30°C. This low leakage enables use in high-impedance reference networks where error currents must remain below 100 nA - a key requirement in precision analog sensing circuits using the 1PMT5937CE3/TR13.
Does 1PMT5937CE3/TR13 have a defined cathode marking?
Yes, the cathode of the 1PMT5937CE3/TR13 is unambiguously designated by TAB 1, as stated in the Mechanical Characteristics section of MSC0995. The package body also features a polarity marking adjacent to TAB 1. This physical designation ensures correct orientation during automated placement and eliminates ambiguity in layout - critical for reliable operation of the 1PMT5937CE3/TR13 in production assemblies.
1PMT5937CE3/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
1PMT5937CE3/TR13 FAQ
1.How can I place an order for 1PMT5937CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5937CE3/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 1PMT5937CE3/TR13 reliable?
The price and inventory of 1PMT5937CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5937CE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5937CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5937CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5937CE3/TR13?
1PMT5937CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5937CE3/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 1PMT5937CE3/TR13?
For technical support, including 1PMT5937CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5937CE3/TR13 requirements.
6.How does Aetrix verify that 1PMT5937CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5937CE3/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 1PMT5937CE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5937CE3/TR13?
All 1PMT5937CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5937CE3/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 1PMT5937CE3/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5937CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5937CE3/TR13 Tags
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