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Microchip Technology 1PMT5946CE3/TR13
- Part No.:
- 1PMT5946CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5946CE3/TR13.pdf
- Description:
- DIODE ZENER 75V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,084
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Product details
Overview
1PMT5946CE3/TR13 from Microsemi is a 75 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 140 Ω dynamic impedance at 5.0 mA test current and <2000 µA reverse leakage at 60 V, used for precision voltage regulation in industrial power supplies and overvoltage protection circuits.
For engineers reviewing the 1PMT5946CE3/TR13 datasheet, 1PMT5946CE3/TR13 pinout, 1PMT5946CE3/TR13 application, or 1PMT5946CE3/TR13 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.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. Its Powermite® package features a full metallic bottom and integral locking tab that serves as both mechanical anchor and thermal path to PCB copper, enabling efficient heat transfer from junction to TAB 1.
The device exhibits tight voltage regulation with 5.0 mA test current (IZT), 140 Ω dynamic impedance (ZZT), and 0.25 mA knee current (IZK) at 18.2 V, supporting reliable clamping in transient suppression and feedback loop stabilization where low leakage (<2000 µA at VR = 60 V) and predictable Zener slope are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 75 V ±5% at IZT = 5.0 mA - defines nominal regulation point with production-grade tolerance for feedback and clamp applications. |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - maximum continuous DC power handling with defined thermal boundary condition. |
| Dynamic Impedance | 140 Ω at IZT = 5.0 mA - quantifies voltage variation per current change; impacts regulation accuracy under dynamic load. |
| Reverse Leakage | <2000 µA at VR = 60 V - ensures minimal standby current in high-impedance bias networks and sensing paths. |
| Thermal Resistance | 30°C/W junction-to-TAB 1 - enables thermal modeling of junction temperature rise under PCB copper area and airflow conditions. |
| ESD Rating | >16 kV per Human Body Model - supports robustness in handling and board-level integration without additional protection. |
| Knee Current | 0.25 mA at VK = 18.2 V - specifies minimum current needed to enter usable breakdown region; informs low-current bias design. |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral locking tab; cathode designated by TAB 1; mounting position unrestricted; weight ≈ 0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary thermal and electrical connection point; must be soldered to PCB copper pour for thermal management and circuit return path. |
| Lead 2 | Anode | Standard anode terminal; connects to regulated node or voltage source depending on clamping/regulation configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow while delivering 3.0 W power handling comparable to larger through-hole Zeners. |
| Integral heat sink locking tab | Provides mechanical retention during reflow and reduces thermal resistance by direct metal-to-PCB conduction path. |
| Full metallic bottom | Eliminates solder flux entrapment risk, improving long-term reliability and solder joint integrity in high-volume manufacturing. |
| ESD robustness | >16 kV HBM rating allows safe handling and integration into unshielded industrial control modules without added protection circuitry. |
| Tight Zener tolerance option | ±5% standard (suffix 'E'); ±2% (suffix 'C') and ±1% (suffix 'D') available for precision reference applications. |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Zener reference element providing precise 75 V threshold for optocoupler bias and error signal generation. Use Value: Maintains output regulation accuracy within ±5% across temperature and line variations due to low dynamic impedance and stable VZ drift. | Use Scenario: Clamping surge transients on 48 V telecom power rails during lightning-induced events. IC Role / Device Role / Timing Role: Shunt protection device diverting excess energy to ground when rail exceeds 75 V. Use Value: Absorbs up to 3.0 W continuously and handles peak surges without degradation, supported by robust thermal path via TAB 1. |
| Automated Test Equipment (ATE) Reference | Programmable Logic Controller (PLC) Input Protection |
Use Scenario: Providing stable voltage reference for 16-bit DAC calibration in benchtop instrumentation. IC Role / Device Role / Timing Role: Precision voltage source for ratiometric measurement and offset correction. Use Value: Low reverse leakage (<2000 µA) prevents loading errors in high-impedance reference buffers and improves long-term calibration stability. | Use Scenario: Protecting 24 V digital input channels from field-wiring induced transients in factory automation systems. IC Role / Device Role / Timing Role: Front-end clamp limiting input voltage to safe levels before Schmitt-trigger conditioning. Use Value: >16 kV HBM ESD rating ensures survivability during installation and maintenance without external TVS devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5359B | Same 75 V nominal Zener voltage but DO-204AL package; higher thermal resistance (65°C/W); no metallic bottom or locking tab. | Lower power density; less suitable for high-reliability automated SMT lines requiring flux-free assembly. | Select 1PMT5946CE3/TR13 when thermal performance, ESD robustness, and SMT process compatibility are prioritized. |
| SMBJ75A | TVS diode (not Zener); 75 V standoff, 100 W peak pulse power; bidirectional; higher clamping voltage (123 V) under surge. | Designed for transient suppression only-not for precision regulation or continuous voltage reference use. | Choose 1PMT5946CE3/TR13 for stable DC regulation; choose SMBJ75A only for high-energy transient clamping where regulation accuracy is irrelevant. |
Compared with 1N5359B and SMBJ75A, the 1PMT5946CE3/TR13 uniquely combines precision Zener regulation, 3.0 W continuous dissipation in SMT form, and integrated thermal/ESD robustness-making it optimal for space-constrained industrial power and reference designs where long-term stability and manufacturability matter.
Availability
1PMT5946CE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, programmable logic controllers, automated test equipment, and telecom surge protection systems requiring stable component supply and consistent parametric performance across production lots.
Supply support for 1PMT5946CE3/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 semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The Powermite® Zener series-including 1PMT5946CE3/TR13-is engineered for high-power-density surface-mount voltage regulation and protection in harsh-environment applications where thermal management, ESD immunity, and automated assembly compatibility are essential.
FAQ
What is the Zener voltage tolerance for 1PMT5946CE3/TR13?
The 1PMT5946CE3/TR13 has a standard Zener voltage tolerance of ±5% at 75 V, measured at 5.0 mA test current with TAB 1 held at 30°C. Tighter tolerances of ±2% (suffix C) and ±1% (suffix D) are available upon request. This tolerance directly affects regulation accuracy in feedback loops and reference circuits.
How is thermal management handled in the 1PMT5946CE3/TR13 package?
The 1PMT5946CE3/TR13 uses the Powermite® package with a full metallic bottom and integral locking tab acting as the primary thermal path. Its specified thermal resistance is 30°C/W junction-to-TAB 1, meaning effective heat transfer requires direct soldering of TAB 1 to a sufficient PCB copper area. This design eliminates flux entrapment and enhances long-term reliability under thermal cycling.
Can 1PMT5946CE3/TR13 be used in place of through-hole Zener diodes like 1N5359B?
Yes, the 1PMT5946CE3/TR13 provides equivalent 75 V Zener voltage and 3.0 W power rating but in a surface-mount Powermite® package. Unlike the DO-204AL 1N5359B, it offers lower thermal resistance (30°C/W vs. 65°C/W), ESD robustness (>16 kV HBM), and automated assembly compatibility-making it a superior drop-in replacement where board space and thermal performance are constrained.
What is the maximum reverse leakage current for 1PMT5946CE3/TR13?
The maximum reverse leakage current for 1PMT5946CE3/TR13 is 2000 µA at 60 V reverse voltage and TL = 30°C. This value is critical for high-impedance bias networks and precision reference applications, where excessive leakage could introduce error or instability. The low leakage supports stable operation in feedback paths and sensor interfaces.
Is 1PMT5946CE3/TR13 compatible with standard SMT reflow profiles?
Yes, the 1PMT5946CE3/TR13 is qualified for standard lead-free reflow processes and packaged in EIA-481 tape-and-reel format (7-inch reel: 3,000 pcs; 13-inch reel: 12,000 pcs). Its Powermite® construction-featuring a molded body and metallic bottom-ensures mechanical stability and solder wetting consistency, making it fully compatible with automated insertion and reflow equipment used in high-volume manufacturing.
1PMT5946CE3/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):
- 75 V
- Tolerance:
- ±2%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 140 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 56 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
1PMT5946CE3/TR13 FAQ
1.How can I place an order for 1PMT5946CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5946CE3/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 1PMT5946CE3/TR13 reliable?
The price and inventory of 1PMT5946CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5946CE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5946CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5946CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5946CE3/TR13?
1PMT5946CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5946CE3/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 1PMT5946CE3/TR13?
For technical support, including 1PMT5946CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5946CE3/TR13 requirements.
6.How does Aetrix verify that 1PMT5946CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5946CE3/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 1PMT5946CE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5946CE3/TR13?
All 1PMT5946CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5946CE3/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 1PMT5946CE3/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5946CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5946CE3/TR13 Tags
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