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Microchip Technology 1PMT5945CE3/TR13
- Part No.:
- 1PMT5945CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5945CE3/TR13.pdf
- Description:
- DIODE ZENER 68V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,706
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Product details
Overview
1PMT5945CE3/TR13 from Microsemi is a 68 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 5.5 mA test current (IZT), 120 Ω dynamic impedance (ZZT), and <1 µA reverse leakage at 51.2 V. It serves as a precision voltage reference or overvoltage clamp in power supply regulation circuits.
For engineers reviewing the 1PMT5945CE3/TR13 datasheet, 1PMT5945CE3/TR13 pinout, 1PMT5945CE3/TR13 application, or 1PMT5945CE3/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 voltage across its terminals under varying load or line conditions. Its Powermite® package features a full metallic bottom and integral locking tab that functions as both mechanical anchor and heat sink, enabling efficient thermal transfer from junction to PCB pad.
The device exhibits tight voltage regulation with 120 Ω dynamic impedance at 5.5 mA IZT and maintains <1 µA reverse leakage up to 51.2 V, supporting reliable clamping in transient suppression and reference applications where low drift and repeatable knee behavior are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 68 V ±5% - precise clamping threshold at 5.5 mA test current |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - defines maximum continuous thermal load on PCB pad |
| Dynamic Impedance (ZZT) | 120 Ω at IZT = 5.5 mA - determines voltage variation under small-signal current changes |
| Reverse Leakage (IR) | <1 µA at VR = 51.2 V - ensures minimal standby current in high-impedance bias networks |
| Thermal Resistance | 30°C/W junction-to-TAB - quantifies temperature rise per watt dissipated into PCB copper |
| ESD Rating | >16 kV HBM - supports robust handling in automated manufacturing without protection circuitry |
| Knee Current (IZK) | 0.25 mA - minimum current required to enter stable breakdown region |
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; compatible with EIA-481 tape-and-reel (TR13 = 13-inch reel, 12,000 pcs).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat-sinking terminal and voltage reference node; must be connected to low-impedance ground or return plane |
| Lead 2 | Anode | Signal input terminal; reverse-biased connection point for clamping or regulation |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables high-density PCB layout 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-pad conduction |
| Full metallic bottom | Eliminates solder flux entrapment risk, improving long-term reliability and solder joint integrity |
| ESD robustness | >16 kV Human Body Model rating allows safe handling in standard SMT lines without special ESD controls |
| Tight Zener tolerance option | ±5% standard ('E' suffix); ±2% ('C') and ±1% ('D') available for precision reference designs |
Applications
| DC Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing output voltage in unregulated linear supplies or post-regulation monitoring stages. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference and error-sensing element. Use Value: Maintains ±5% output accuracy under load transients due to 120 Ω ZZT and 30°C/W thermal resistance. | Use Scenario: Clamping surge-induced voltage spikes on 48 V telecom or industrial control bus lines. IC Role / Device Role / Timing Role: Transient voltage suppressor placed across protected rail and ground. Use Value: Responds within nanoseconds to >51.2 V events with <1 µA leakage below clamp threshold. |
| Programmable Reference Source | Temperature-Stable Bias Network |
Use Scenario: Generating fixed bias points for op-amp comparators or ADC reference dividers. IC Role / Device Role / Timing Role: Precision voltage source defining trip thresholds in analog signal chains. Use Value: Delivers stable 68 V reference with minimal drift over -55°C to +150°C junction range. | Use Scenario: Establishing thermally compensated current sources in sensor front-ends. IC Role / Device Role / Timing Role: Zener-based current mirror reference with predictable TC behavior. Use Value: Enables predictable bias current scaling using known VZ temperature coefficient of Powermite® series. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ68CA | 68 V bidirectional TVS, 1500 W peak pulse power, higher capacitance, no specified ZZT or IZK | Designed for high-energy surge suppression, not precision regulation | Select only if transient energy exceeds 3 W continuous duty; not suitable for reference use |
| 1N5367B | 68 V Zener, DO-201AD package, 5 W rating, 130 Ω ZZT, 35°C/W junction-to-case | Larger footprint, lower thermal efficiency, through-hole or SMT-compatible leadform | Choose when higher power margin is needed and board space permits larger package |
Compared with SMCJ68CA and 1N5367B, the 1PMT5945CE3/TR13 offers superior thermal performance (30°C/W vs. 35°C/W or undefined), tighter regulation (120 Ω ZZT), and optimized SMT manufacturability-making it preferred for compact, high-reliability voltage reference designs.
Availability
1PMT5945CE3/TR13 is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection circuits, and programmable reference source applications requiring stable component supply and traceable sourcing.
Supply support for 1PMT5945CE3/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 to deliver high-power surface-mount voltage regulation in space-constrained environments where thermal management and automated assembly are critical.
FAQ
What is the Zener voltage tolerance for 1PMT5945CE3/TR13?
The 1PMT5945CE3/TR13 has a nominal Zener voltage of 68 V with a standard tolerance of ±5%, as indicated by the 'E' suffix. This tolerance is measured at 5.5 mA test current (IZT) with TAB 1 held at 30°C. Tighter tolerances (±2% and ±1%) are available with 'C' and 'D' suffixes respectively, but the 1PMT5945CE3/TR13 specifically uses the ±5% grade.
How is thermal management handled in the 1PMT5945CE3/TR13 package?
The 1PMT5945CE3/TR13 uses the Powermite® package with a full metallic bottom and integral locking tab that serves as the primary thermal path. Its junction-to-TAB thermal resistance is 30°C/W, meaning TAB 1 must be connected to a sufficiently sized copper pour to dissipate up to 3.0 W continuously. The metallic bottom also eliminates solder flux entrapment, ensuring consistent thermal interface quality after reflow.
Can 1PMT5945CE3/TR13 be used in place of through-hole Zener diodes like 1N5367B?
Yes, the 1PMT5945CE3/TR13 can replace 1N5367B in many applications, but with important distinctions: it offers better thermal resistance (30°C/W vs. 35°C/W), smaller footprint, and SMT-only assembly. However, its 3.0 W rating is lower than 1N5367B's 5 W, so derating is required above 60°C ambient. The 1PMT5945CE3/TR13 is not pin-compatible-it requires a dedicated Powermite® land pattern.
What does the 'TR13' suffix indicate in 1PMT5945CE3/TR13?
The 'TR13' suffix denotes tape-and-reel packaging per EIA-481 standard on a 13-inch reel containing 12,000 units. This format is optimized for high-volume automated pick-and-place assembly. The 'E3' portion indicates ±5% Zener voltage tolerance and RoHS-compliant termination (lead-free matte tin), consistent with Microsemi's standard coding for this family.
Is 1PMT5945CE3/TR13 suitable for automotive applications?
The 1PMT5945CE3/TR13 operates across -55°C to +150°C junction temperature and meets >16 kV HBM ESD rating, satisfying baseline environmental robustness for many automotive subsystems. However, it is not AEC-Q200 qualified. For automotive-grade use, system-level validation-including board-level thermal cycling and humidity testing-is required, and qualification documentation must be obtained separately from Microchip.
1PMT5945CE3/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):
- 68 V
- Tolerance:
- ±2%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 120 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 51.2 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
1PMT5945CE3/TR13 FAQ
1.How can I place an order for 1PMT5945CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5945CE3/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 1PMT5945CE3/TR13 reliable?
The price and inventory of 1PMT5945CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5945CE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5945CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5945CE3/TR13 transactions.
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4.How is shipping managed for 1PMT5945CE3/TR13?
1PMT5945CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5945CE3/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 1PMT5945CE3/TR13?
For technical support, including 1PMT5945CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5945CE3/TR13 requirements.
6.How does Aetrix verify that 1PMT5945CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5945CE3/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 1PMT5945CE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5945CE3/TR13?
All 1PMT5945CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5945CE3/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 1PMT5945CE3/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5945CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5945CE3/TR13 Tags
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