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Microchip Technology 1PMT5945AE3/TR13
- Part No.:
- 1PMT5945AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5945AE3/TR13.pdf
- Description:
- DIODE ZENER 68V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,049
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Product details
Overview
1PMT5945AE3/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 1700 µA max reverse leakage at 51.2 V. It serves as a precision voltage reference or overvoltage clamp in power supply regulation and transient protection circuits.
For engineers reviewing the 1PMT5945AE3/TR13 datasheet, 1PMT5945AE3/TR13 pinout, 1PMT5945AE3/TR13 application, or 1PMT5945AE3/TR13 equivalent, key selection criteria include zener voltage tolerance, thermal resistance (30°C/W junction-to-TAB1), ESD rating (>16 kV HBM), low knee impedance (0.25 Ω), and compatibility with automated SMT assembly per EIA-481 tape-and-reel packaging.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across its specified test current range. Its Powermite® package integrates a full metallic bottom and locking tab to enhance thermal conduction and eliminate solder flux entrapment during reflow.
The device exhibits low reverse leakage (≤1700 µA at VR = 51.2 V), a sharp knee characteristic (IZK = 0.25 mA, ZZK = 1700 Ω), and stable performance over -55°C to +150°C junction temperature range - enabling reliable operation in industrial and automotive power rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 68 V ±5% - precise clamping threshold at IZT = 5.5 mA, suitable for 65–71 V rail stabilization |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient suppression without external heatsink |
| Dynamic Impedance (ZZT) | 120 Ω at IZT - ensures minimal voltage deviation under load current variation |
| Knee Impedance (ZZK) | 1700 Ω at IZK = 0.25 mA - defines low-current regulation onset for standby-mode protection |
| Thermal Resistance | 30°C/W junction-to-TAB1 - supports direct thermal coupling to PCB copper pour or metal-core substrate |
| ESD Rating | >16 kV HBM - provides robust handling immunity during board assembly and field operation |
| Reverse Leakage (IR) | ≤1700 µA at VR = 51.2 V - guarantees low quiescent power loss in always-on protection circuits |
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 path and electrical cathode connection; must be soldered to thermal pad for rated 3.0 W dissipation |
| Lead 2 | Anode | Standard anode terminal; mounted opposite TAB 1, compatible with standard SMT pick-and-place nozzles |
Key Features
| Feature | Design Value |
|---|---|
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term solder joint reliability and reducing post-assembly cleaning needs |
| Integral heat-sink locking tab | Provides mechanical anchoring and direct thermal conduction path from junction to PCB, enabling 3.0 W operation without external heatsink |
| EIA-481 tape-and-reel packaging | Supports high-speed automated placement on SMT lines with 3,000 pcs/reel (7″) or 12,000 pcs/reel (13″) |
| Wide zener voltage range (3.3–200 V) | Enables single-package-family design reuse across multiple power rail voltages in industrial control and telecom systems |
Applications
| Industrial Power Supply Regulation | Automotive ECUs |
|---|---|
Use Scenario: Stabilizing 68 V auxiliary rail in programmable logic controller (PLC) backplane power modules. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference and overvoltage clamp. Use Value: Maintains ±5% output accuracy under 5.5 mA to 51.2 mA load variation, leveraging 120 Ω ZZT and 30°C/W thermal resistance for stable thermal behavior. | Use Scenario: Protecting CAN transceiver supply input against load-dump transients up to 68 V. IC Role / Device Role / Timing Role: Primary overvoltage clamp in 12 V/24 V dual-voltage automotive subsystems. Use Value: Absorbs 3.0 W peak energy without degradation, supported by >16 kV HBM ESD rating and -55°C to +150°C operating range. |
| Telecom Line Card Protection | Renewable Energy Inverters |
Use Scenario: Clamping surge-induced overvoltage on AC/DC converter secondary side in base station line cards. IC Role / Device Role / Timing Role: Transient voltage suppressor (TVS) function via Zener breakdown mechanism. Use Value: Responds within nanoseconds to fast-rising transients, with ≤1700 µA IR ensuring minimal standby current draw in always-on monitoring circuits. | Use Scenario: Reference voltage source for DC-link voltage sensing in solar microinverters operating at 60–70 V nominal. IC Role / Device Role / Timing Role: Precision voltage reference for ADC biasing and comparator trip-point setting. Use Value: Delivers stable 68 V reference with ±5% tolerance and low knee impedance (1700 Ω), minimizing measurement error across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5945BRLG | Same 68 V nominal, ±5%, but in DO-41 through-hole package; higher thermal resistance (~65°C/W); no metallic bottom or locking tab | Requires manual or wave-solder assembly; unsuitable for high-density SMT layouts or high-power SMT thermal management | Select only when legacy through-hole compatibility or lower-cost manual assembly is prioritized over thermal performance and automation support |
| BZX84-C68LT1G | 68 V ±5%, SOT-23 package; 350 mW rating; 300 Ω ZZT; 100 µA IR at 54.4 V; no ESD rating specified | Limited to low-power signal-level clamping; cannot sustain 3.0 W surges or continuous regulation in power rails | Choose for space-constrained signal conditioning where power handling is secondary to footprint size |
Compared with 1N5945BRLG and BZX84-C68LT1G, the 1PMT5945AE3/TR13 uniquely delivers 3.0 W SMT-compatible power handling with integrated thermal management and >16 kV ESD robustness - making it the only option among the three qualified for industrial-grade power rail stabilization and transient suppression.
Availability
1PMT5945AE3/TR13 is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive ECU protection, and telecom line card surge suppression requiring stable component supply, consistent tape-and-reel delivery, and long-lifecycle availability.
Supply support for 1PMT5945AE3/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 and transient protection in harsh-environment applications where thermal performance, ESD robustness, and automated manufacturability are critical.
FAQ
What is the zener voltage tolerance for 1PMT5945AE3/TR13?
The 1PMT5945AE3/TR13 has a nominal zener voltage of 68 V with a standard tolerance of ±5%, as confirmed in the MSC0995.PDF datasheet. Tighter tolerances (±2% and ±1%) are available with suffixes C and D respectively, but the E3 suffix indicates the standard ±5% version. This tolerance applies at IZT = 5.5 mA and TAB temperature = 30°C.
How is thermal management handled in the 1PMT5945AE3/TR13 package?
The 1PMT5945AE3/TR13 uses the Powermite® package with a full metallic bottom and integral locking tab that acts as a heat sink. Its junction-to-TAB1 thermal resistance is 30°C/W, enabling 3.0 W power dissipation when TAB 1 is maintained at 60°C. Effective thermal design requires soldering TAB 1 to a thermally robust PCB copper area.
What is the maximum reverse leakage current for 1PMT5945AE3/TR13?
The 1PMT5945AE3/TR13 specifies a maximum reverse leakage current (IR) of 1700 µA at a reverse voltage (VR) of 51.2 V, measured at TL = 30°C. This value reflects worst-case leakage under sub-breakdown conditions and is critical for low-power standby circuit design where quiescent current must be minimized.
Is 1PMT5945AE3/TR13 compatible with automated SMT assembly?
Yes, the 1PMT5945AE3/TR13 is fully compatible with automated SMT assembly. It is supplied in EIA-481 standard tape-and-reel format (3,000 pcs per 7″ reel), features a symmetric lead configuration, and its Powermite® package includes design elements - such as the locking tab and flux-free metallic bottom - specifically optimized for reliable pick-and-place and reflow processing.
What does the "TR13" suffix indicate in 1PMT5945AE3/TR13?
The "TR13" suffix in 1PMT5945AE3/TR13 denotes 13-inch tape-and-reel packaging containing 12,000 units, per Microsemi's standard packaging specification. The "E3" portion indicates the ±5% zener voltage tolerance and RoHS-compliant finish. Together, TR13 confirms full compliance with EIA-481 and supports high-volume automated manufacturing logistics.
1PMT5945AE3/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:
- ±10%
- 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
1PMT5945AE3/TR13 FAQ
1.How can I place an order for 1PMT5945AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5945AE3/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 1PMT5945AE3/TR13 reliable?
The price and inventory of 1PMT5945AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5945AE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5945AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5945AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5945AE3/TR13?
1PMT5945AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5945AE3/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 1PMT5945AE3/TR13?
For technical support, including 1PMT5945AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5945AE3/TR13 requirements.
6.How does Aetrix verify that 1PMT5945AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5945AE3/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 1PMT5945AE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5945AE3/TR13?
All 1PMT5945AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5945AE3/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 1PMT5945AE3/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5945AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5945AE3/TR13 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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Diodes Incorporated
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