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Microchip Technology 1PMT5955CE3/TR7
- Part No.:
- 1PMT5955CE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5955CE3/TR7.pdf
- Description:
- DIODE ZENER 180V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,050
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Product details
Overview
1PMT5955CE3/TR7 from Microsemi is a 180 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 900 Ω dynamic impedance at 2.1 mA test current and thermal resistance of 30°C/W junction-to-TAB1 - used for precision voltage regulation and overvoltage protection in high-reliability power supplies.
For engineers reviewing the 1PMT5955CE3/TR7 datasheet, 1PMT5955CE3/TR7 pinout, 1PMT5955CE3/TR7 application, or 1PMT5955CE3/TR7 equivalent, key selection considerations include its 180 V zener voltage, 3.0 W power handling in a DO-216 molded SMD package, ESD rating >16 kV HBM, and cathode designation via TAB 1.
Technical Context
This Zener diode operates as a voltage reference and clamp device in DC power rails and transient suppression circuits. It features a full metallic bottom for flux-free soldering and an integral locking tab that serves as both mechanical anchor and heat sink to TAB 1.
Designed for automatic insertion and reflow assembly, it maintains stable regulation across -55°C to +150°C junction temperature range. Its 180 V nominal zener voltage is specified at IZT = 2.1 mA with 900 Ω dynamic impedance (ZZT), and exhibits low reverse leakage (IR ≤ 1 µA at VR = 136.8 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 180 V ±5% at IZT = 2.1 mA - sets precise clamping threshold for overvoltage protection |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables robust thermal performance in compact SMD layouts |
| Dynamic Impedance | 900 Ω at IZT - indicates moderate regulation stiffness under small-signal AC perturbation |
| Thermal Resistance | 30°C/W junction-to-TAB1 - defines temperature rise per watt dissipated at the metal tab |
| ESD Rating | >16 kV HBM - ensures handling robustness during automated PCB assembly |
| Reverse Leakage | ≤1 µA at VR = 136.8 V - guarantees minimal standby current in high-impedance bias networks |
| Junction Temp Range | -55°C to +150°C - supports operation in automotive under-hood and industrial control environments |
Pinout & Package
The 1PMT5955CE3/TR7 uses a DO-216 (Powermite®) surface-mount package with molded body and full metallic bottom. Cathode is unambiguously designated by TAB 1, which serves as both electrical terminal and primary thermal path.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Main current-carrying and heat-dissipating terminal; must be thermally connected to PCB copper pour |
| Lead 2 | Anode | Standard anode connection; electrically isolated from TAB 1 and mounted on opposite side of package |
Key Features
| Feature | Design Value |
|---|---|
| Integral Heat Sink Tab | TAB 1 functions as structural anchor and thermal interface - eliminates need for external heatsink in 3 W applications |
| Flux-Free Metallic Bottom | Full metal base prevents solder flux entrapment - improves long-term reliability and reduces post-assembly cleaning requirements |
| Automated Insertion Compatibility | DO-216 footprint and locking tab geometry support high-yield pick-and-place and reflow processes |
| High ESD Robustness | >16 kV HBM rating - protects against electrostatic discharge damage during handling and board assembly |
Applications
| Industrial Power Supply Regulation | Automotive ECU Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing reference voltage in isolated DC-DC converter feedback loops operating up to 200 V input. IC Role / Device Role / Timing Role: Zener diode providing precise 180 V shunt regulation to maintain output accuracy under load transients. Use Value: Tight ±5% VZ tolerance and low IR ensure minimal drift in feedback divider error over temperature and time. | Use Scenario: Clamping induced transients on 12 V/24 V vehicle battery rails during load dump events. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing energy spikes above 136.8 V while limiting peak rail voltage. Use Value: 3.0 W power rating and 30°C/W thermal resistance allow sustained clamping without thermal runaway. |
| Test Equipment Reference Source | Telecom Line Interface Protection |
Use Scenario: Generating stable high-voltage bias for photomultiplier tube (PMT) anode chains in analytical instrumentation. IC Role / Device Role / Timing Role: Precision Zener reference supplying calibrated 180 V to cascaded dynode stages. Use Value: Low dynamic impedance (900 Ω) minimizes voltage droop under microamp-level dynode current variations. | Use Scenario: Protecting RS-485 transceivers and line drivers from lightning-induced surges on outdoor telecom lines. IC Role / Device Role / Timing Role: Primary shunt clamp limiting line-to-ground voltage excursion during surge events. Use Value: Full metallic bottom and TAB 1 thermal path enable rapid heat dissipation during multi-pulse surge testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5955B | Same 180 V VZ and ±5% tolerance, but in DO-41 through-hole package; no metallic tab or locking feature | Lacks integrated heat sinking and automated placement capability; requires wave solder or hand assembly | Select when legacy through-hole layout or manual repair is required |
| BZX85C180 | 180 V VZ, ±5%, DO-41 package; 1.3 W power rating vs. 3.0 W; higher ZZT (~1.2 kΩ) | Lower power handling limits use in sustained-clamp scenarios; unsuitable for >1.3 W transient absorption | Select only for low-duty-cycle clamping where thermal mass is sufficient |
Compared with 1N5955B and BZX85C180, the 1PMT5955CE3/TR7 delivers 2.3× higher power dissipation in a surface-mount form with superior thermal management and ESD robustness - making it the preferred choice for automated, high-reliability, high-power Zener applications.
Availability
1PMT5955CE3/TR7 is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive ECU overvoltage clamp, and telecom line interface protection requiring stable component supply and traceable sourcing.
Supply support for 1PMT5955CE3/TR7 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.
The Powermite® Zener diode product line was engineered for high-power density surface-mount voltage regulation and transient suppression in space-constrained, thermally demanding environments.
FAQ
What is the zener voltage tolerance for 1PMT5955CE3/TR7?
The 1PMT5955CE3/TR7 has a standard zener voltage tolerance of ±5% at 180 V, measured at IZT = 2.1 mA with TAB 1 held at 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D, but the CE3/TR7 variant specifies ±5%. This tolerance directly impacts regulation accuracy in feedback and reference circuits using the 1PMT5955CE3/TR7.
How is cathode identification implemented on 1PMT5955CE3/TR7?
The cathode of the 1PMT5955CE3/TR7 is designated by TAB 1 - a full metallic bottom terminal visible on the underside of the DO-216 Powermite® package. This tab serves as both the cathode connection and primary thermal path. Correct orientation is critical: TAB 1 must connect to the higher-potential node in shunt regulator configurations. The 1PMT5955CE3/TR7 datasheet explicitly confirms this marking convention.
What is the maximum power dissipation rating for 1PMT5955CE3/TR7?
The 1PMT5955CE3/TR7 is rated for 3.0 W DC power dissipation when TAB 1 is maintained at 60°C. This rating assumes proper thermal coupling of TAB 1 to PCB copper. Derating is required above 60°C ambient or TAB temperature - for example, at TAB = 100°C, max power drops to ~1.8 W. This 3.0 W capability distinguishes the 1PMT5955CE3/TR7 from lower-power Zeners like the BZX85C180.
Does 1PMT5955CE3/TR7 support automated assembly processes?
Yes, the 1PMT5955CE3/TR7 is explicitly designed for compatibility with automatic insertion equipment and reflow soldering. Its Powermite® package includes a unique locking tab that secures placement during handling and provides mechanical stability. The tape-and-reel packaging (EIA-481, 3,000 pcs per 7-inch reel) further enables seamless integration into SMT lines - a key advantage over through-hole alternatives like the 1N5955B when using the 1PMT5955CE3/TR7.
What is the thermal resistance specification for 1PMT5955CE3/TR7?
The 1PMT5955CE3/TR7 has a thermal resistance of 30°C/W from junction to TAB 1. This value quantifies how effectively heat flows from the silicon die to the metal tab, enabling accurate junction temperature estimation: TJ = TTAB + (PD × 30). For reliable operation at full 3.0 W, TAB 1 must be kept ≤60°C - meaning the PCB thermal design must dissipate ≥3 W while maintaining that tab temperature. This parameter is central to thermal validation of any design using the 1PMT5955CE3/TR7.
1PMT5955CE3/TR7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-216AA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 180 V
- Tolerance:
- ±2%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 800 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 136.8 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
1PMT5955CE3/TR7 FAQ
1.How can I place an order for 1PMT5955CE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5955CE3/TR7 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 1PMT5955CE3/TR7 reliable?
The price and inventory of 1PMT5955CE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5955CE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5955CE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5955CE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5955CE3/TR7?
1PMT5955CE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5955CE3/TR7 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 1PMT5955CE3/TR7?
For technical support, including 1PMT5955CE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5955CE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5955CE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5955CE3/TR7 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 1PMT5955CE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5955CE3/TR7?
All 1PMT5955CE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5955CE3/TR7, 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 1PMT5955CE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5955CE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5955CE3/TR7 Tags
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