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Microchip Technology 1PMT5945/TR13
- Part No.:
- 1PMT5945/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5945/TR13.pdf
- Description:
- DIODE ZENER 68V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,469
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Product details
Overview
1PMT5945/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 120 Ω dynamic impedance at 5.5 mA test current and 1700 µA max reverse leakage at 51.2 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails of industrial control modules.
For engineers reviewing the 1PMT5945/TR13 datasheet, 1PMT5945/TR13 pinout, 1PMT5945/TR13 application, or 1PMT5945/TR13 equivalent, key selection criteria include its 3.0 W thermal capability with metallic-tab heat sinking, DO-216 mechanical outline, ESD rating >16 kV HBM, and tight zener voltage stability under 5.5 mA IZT.
Technical Context
This Zener diode operates in reverse breakdown mode to regulate or clamp voltage at 68 V nominal, with knee current (IZK) of 0.25 mA and knee impedance (ZZK) of 1700 Ω - indicating stable conduction onset. Its full metallic bottom and locking tab provide direct thermal path to PCB copper, enabling 30°C/W junction-to-TAB thermal resistance.
The device complies with EIA-481 tape-and-reel packaging (7" reel, 3000 pcs), supports automatic insertion, and maintains reverse leakage ≤1700 µA at 51.2 V (90% of VZ). Zener voltage is specified at TL = 30°C with 20-second DC stabilization per measurement protocol.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 68 V ±5% at IZT = 5.5 mA - defines clamping threshold for overvoltage protection circuits |
| 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 = 5.5 mA - ensures minimal voltage shift under load current variation |
| Reverse Leakage (IR) | ≤1700 µA at VR = 51.2 V - guarantees low standby power loss in always-on monitoring circuits |
| Thermal Resistance | 30°C/W junction-to-TAB - allows direct thermal coupling to PCB ground plane for sustained 3 W operation |
| ESD Rating | >16 kV HBM - protects against handling-induced discharge during SMT assembly and field operation |
| Package Outline | DO-216 (Powermite®) - surface-mount footprint compatible with standard reflow profiles and AOI inspection |
Pinout & Package
Powermite® package features a molded body with full metallic bottom and integral locking tab acting as cathode terminal (TAB 1). Cathode is designated by TAB 1; anode is the opposing lead. Mounting orientation is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat-sinking interface and voltage reference node; must be connected to low-impedance ground or return path |
| Lead 2 | Anode | Current entry point during reverse-bias operation; connects to protected node or supply rail |
Key Features
| Feature | Design Value |
|---|---|
| Full metallic bottom | Eliminates solder flux entrapment during reflow, ensuring reliable solder joint integrity and long-term thermal performance |
| Integral heat sink locking tab | Provides mechanical anchoring and direct thermal conduction path from junction to PCB copper, reducing thermal resistance by ~40% vs. standard SOD packages |
| Automatic insertion compatibility | Robust mechanical design withstands pick-and-place nozzle pressure and conveyor vibration without misalignment or damage |
| Low reverse leakage | 1700 µA max at 51.2 V enables use in battery-backed or energy-harvesting systems where quiescent current is critical |
Applications
| Industrial Power Supply Monitoring | Automotive Body Control Module Clamp |
|---|---|
Use Scenario: Real-time detection of 24 V rail overvoltage events in programmable logic controller (PLC) power stages. IC Role / Device Role / Timing Role: Zener clamping element referenced to system ground, absorbing transient surges above 68 V. Use Value: Prevents damage to downstream 3.3 V/5 V regulators and microcontrollers during load dump or inductive kickback. | Use Scenario: Protection of LIN bus transceiver inputs against battery voltage spikes during jump-start conditions. IC Role / Device Role / Timing Role: Standby-mode voltage clamp on 12 V supply line feeding CAN/LIN interface ICs. Use Value: Maintains <1700 µA leakage at 51.2 V, avoiding false wake-up or excessive sleep-current drain. |
| Telecom DC-DC Converter Reference | Medical Infusion Pump Safety Circuit |
Use Scenario: Precision feedback reference for isolated 48 V to 5 V flyback converter in base station power modules. IC Role / Device Role / Timing Role: Stable 68 V Zener reference used in optocoupler feedback loop to regulate output voltage. Use Value: 120 Ω ZZT ensures <0.7 V deviation across 1–10 mA load variation, improving output regulation to ±1.5%. | Use Scenario: Redundant overvoltage cutoff in dual-redundant 24 V motor driver stage for IV pump actuation. IC Role / Device Role / Timing Role: Fail-safe clamp that triggers hardware shutdown when supply exceeds 68 V ±5%. Use Value: >16 kV HBM ESD rating prevents spurious triggering from ESD events in clinical environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ68A | TVS diode (not Zener); 68 V standoff, 100 W peak pulse power, higher capacitance (~200 pF) | Designed for transient surge suppression (IEC 61000-4-5), not precision DC regulation | Select only for high-energy transients; not suitable for voltage reference or low-leakage biasing |
| BZX84-C68 | SOT-23 package; 68 V ±5%, 300 mW power rating, 1000 Ω ZZT, no metallic heat sink | Limited to low-power signal-level clamping; cannot sustain 3 W continuous dissipation | Use where board space is constrained and power <0.5 W; avoid in power rail protection |
Compared with SMCJ68A and BZX84-C68, the 1PMT5945/TR13 uniquely delivers 3.0 W DC power handling in a surface-mount package with metallic-tab thermal management - making it the only option among the three capable of stable, continuous 68 V regulation in industrial power stages.
Availability
1PMT5945/TR13 is available at Aetrix Electronics and suitable for industrial power supply monitoring, automotive body control module clamp, and telecom DC-DC converter reference requiring stable component supply, consistent lot-to-lot parametric performance, and long-term obsolescence mitigation.
Supply support for 1PMT5945/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 and mixed-signal components for aerospace, defense, and industrial markets.
The Powermite® Zener diode product line was engineered for high-power surface-mount voltage regulation in space-constrained, thermally demanding environments - emphasizing robust thermal design, automated assembly compatibility, and stable parametric performance across temperature.
FAQ
What is the maximum continuous power dissipation for 1PMT5945/TR13?
The 1PMT5945/TR13 is rated for 3.0 W DC power dissipation when TAB 1 is maintained at 60°C. This rating assumes direct thermal coupling to a PCB copper area ≥1 cm². Derating is required above 60°C ambient or if TAB 1 temperature exceeds specification limits.
How is the cathode identified on the 1PMT5945/TR13 package?
The cathode of the 1PMT5945/TR13 is designated by TAB 1 - the full metallic bottom surface of the Powermite® package. This tab serves as both the electrical cathode connection and primary thermal interface. The anode is the opposing lead.
Does 1PMT5945/TR13 meet any ESD immunity standards?
Yes, the 1PMT5945/TR13 has an ESD rating exceeding 16 kV per the Human Body Model (HBM), as verified in Microsemi's qualification testing. This makes it suitable for use in environments prone to electrostatic discharge during handling or operation.
What is the reverse leakage current specification for 1PMT5945/TR13?
The 1PMT5945/TR13 has a maximum reverse leakage current (IR) of 1700 µA at a reverse voltage (VR) of 51.2 V (90% of nominal VZ). This value is measured at TL = 30°C and defines the upper bound of standby current in clamping applications.
Is 1PMT5945/TR13 supplied in tape-and-reel format?
Yes, the 1PMT5945/TR13 is supplied in EIA-481 compliant tape-and-reel packaging: 7-inch reels contain 3,000 units, and 13-inch reels contain 12,000 units. The "TR13" suffix explicitly denotes the 13-inch reel configuration.
1PMT5945/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:
- ±20%
- 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
1PMT5945/TR13 FAQ
1.How can I place an order for 1PMT5945/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5945/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 1PMT5945/TR13 reliable?
The price and inventory of 1PMT5945/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5945/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5945/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5945/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5945/TR13?
1PMT5945/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5945/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 1PMT5945/TR13?
For technical support, including 1PMT5945/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5945/TR13 requirements.
6.How does Aetrix verify that 1PMT5945/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5945/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 1PMT5945/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5945/TR13?
All 1PMT5945/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5945/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 1PMT5945/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5945/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5945/TR13 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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