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Microchip Technology 1PMT5953A/TR7
- Part No.:
- 1PMT5953A/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5953A/TR7.pdf
- Description:
- DIODE ZENER 150V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,211
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Product details
Overview
1PMT5953A/TR7 from Microsemi is a 150 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 600 Ω dynamic impedance at 2.5 mA test current and thermal resistance of 30°C/W junction-to-TAB1. It serves as a precision voltage reference or overvoltage clamp in industrial power supplies and automotive control modules.
For engineers reviewing the 1PMT5953A/TR7 datasheet, 1PMT5953A/TR7 pinout, 1PMT5953A/TR7 application, or 1PMT5953A/TR7 equivalent, key selection criteria include its 150 V nominal Zener voltage, 3.0 W power handling in a DO-216 footprint, low reverse leakage (≤1 µA at 114 V), ESD rating >16 kV HBM, and compatibility with automated SMT assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage regulation under varying load and temperature conditions. Its Powermite® package features a full metallic bottom and integral heat sink locking tab, enabling efficient thermal conduction from junction to PCB via TAB 1 - confirmed by 30°C/W thermal resistance and 3.0 W power rating at TAB 1 = 60°C.
The device exhibits tight knee characteristics with IZK = 0.25 mA and ZZK = 6000 Ω, supporting low-current regulation stability. Zener voltage is specified at IZT = 2.5 mA with measurement performed 20 seconds after DC current application, per Micro Note 202 for voltage-current deviation analysis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 150 V ±5% at IZT = 2.5 mA - defines clamping threshold in overvoltage protection circuits |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient suppression without derating in compact layouts |
| Dynamic Impedance (ZZT) | 600 Ω at IZT = 2.5 mA - indicates moderate regulation stiffness for mid-current applications |
| Reverse Leakage (IR) | ≤1 µA at VR = 114 V - ensures minimal standby current in battery-backed or low-power systems |
| Thermal Resistance | 30°C/W junction-to-TAB1 - confirms direct thermal path to PCB copper, critical for sustained power operation |
| ESD Rating | >16 kV per HBM - provides robust handling immunity during automated assembly and field operation |
| Knee Current (IZK) | 0.25 mA - specifies minimum current for stable regulation onset, useful in ultra-low-power biasing |
Pinout & Package
Package: Powermite® (DO-216), 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 thermal and electrical connection point; must be soldered to copper pour for rated 3.0 W dissipation |
| Lead 2 | Anode | Standard anode terminal; electrically isolated from TAB 1; used for circuit return path |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | DO-216 footprint with metallic bottom eliminates flux entrapment and supports reflow-compatible assembly |
| Integral heat sink locking tab | TAB 1 acts as both cathode and primary thermal interface - reduces thermal resistance to 30°C/W |
| Automated insertion compatibility | Robust mechanical design with standardized tape-and-reel packaging (EIA-481, 3,000 pcs/7″ reel) |
| High ESD immunity | >16 kV HBM rating ensures reliability during handling, PCB loading, and end-equipment operation |
Applications
| Industrial Power Supply Protection | Automotive Engine Control Unit Clamping |
|---|---|
Use Scenario: Clamp transients on 12 V or 24 V rail inputs in DIN-rail mounted AC/DC converters. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to limit voltage spikes above 150 V. Use Value: 3.0 W power rating and 30°C/W thermal resistance allow sustained clamping without external heatsink. | Use Scenario: Protect microcontroller I/O pins from load-dump surges in engine management systems. IC Role / Device Role / Timing Role: Overvoltage clamp placed between protected node and chassis ground. Use Value: 150 V VZ aligns with ISO 7637-2 Pulse 5a requirements; >16 kV HBM withstands assembly ESD events. |
| Telecom Line Card Surge Suppression | Programmable Logic Controller Input Conditioning |
Use Scenario: Secondary protection stage following gas discharge tube (GDT) in DSL line interface cards. IC Role / Device Role / Timing Role: Fast-response Zener clamp limiting residual surge to <150 V after GDT crowbarring. Use Value: Low IZK = 0.25 mA ensures regulation onset before damaging thresholds are reached. | Use Scenario: Voltage reference and input protection for 24 V digital input modules in PLC backplanes. IC Role / Device Role / Timing Role: Precision shunt regulator establishing stable 150 V reference for analog monitoring circuits. Use Value: ±5% VZ tolerance and 600 Ω ZZT support repeatable threshold detection 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 |
|---|---|---|---|
| 1N5953B | Same 150 V VZ, but in DO-41 through-hole package; no metallic bottom or locking tab; 3.0 W rating requires lead heatsinking | Not suitable for automated SMT lines; limited thermal performance on PCB without extended leads | Select only when through-hole assembly is required and board-level thermal management permits lead-based conduction |
| BZX85C150 | 150 V VZ, ±5%, but in DO-41; 1.3 W power rating; higher ZZT = 700 Ω; no ESD rating specified | Limited to lower-energy transients; unsuitable for automotive or industrial environments requiring >16 kV HBM | Use only in cost-sensitive, low-power consumer applications where thermal and ESD margins are relaxed |
Compared with 1N5953B and BZX85C150, the 1PMT5953A/TR7 delivers superior thermal performance via its Powermite® package, enables automated SMT placement, and provides certified ESD immunity - making it the preferred choice for high-reliability industrial and automotive designs requiring 3.0 W clamping at 150 V.
Availability
1PMT5953A/TR7 is available at Aetrix Electronics and suitable for industrial power supply protection, automotive engine control unit clamping, and telecom line card surge suppression requiring stable component supply and long-term lifecycle continuity.
Supply support for 1PMT5953A/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 RF solutions for aerospace, defense, industrial, and communications markets.
The Powermite® Zener diode product line was designed to deliver high-power surface-mount voltage regulation in space-constrained applications where thermal performance and assembly compatibility are critical - directly addressing needs in automotive, industrial, and telecom infrastructure.
FAQ
What is the Zener voltage tolerance for 1PMT5953A/TR7?
The 1PMT5953A/TR7 has a standard Zener voltage tolerance of ±5% at 150 V, measured at IZT = 2.5 mA with TAB 1 held at 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D respectively, but the /TR7 variant uses the standard ±5% grade. Voltage measurement must occur 20 seconds after DC current application per Microsemi specification.
How is thermal management handled in the 1PMT5953A/TR7 package?
The 1PMT5953A/TR7 uses the Powermite® package with TAB 1 as the cathode and primary thermal interface. Its 30°C/W junction-to-TAB1 thermal resistance requires direct soldering of TAB 1 to a copper pour for full 3.0 W power dissipation at TAB 1 = 60°C. The full metallic bottom and locking tab ensure low-impedance conduction without flux entrapment.
Is the 1PMT5953A/TR7 compatible with automated SMT assembly processes?
Yes, the 1PMT5953A/TR7 is fully compatible with automated SMT assembly. It is supplied in EIA-481 tape-and-reel format (3,000 pieces per 7-inch reel), and its Powermite® package design - including mechanical stability, defined mounting pad dimensions, and flux-free metallic bottom - meets industry standards for pick-and-place and reflow processing.
What is the maximum reverse leakage current for 1PMT5953A/TR7?
The maximum reverse leakage current for 1PMT5953A/TR7 is 1 µA at VR = 114 V (i.e., 76% of nominal VZ). This value is specified in the Electrical Characteristics table and reflects low standby power consumption, making the device suitable for battery-powered or energy-sensitive applications where leakage must be minimized.
Does the 1PMT5953A/TR7 meet any ESD immunity standards?
Yes, the 1PMT5953A/TR7 is rated for >16 kV per the Human Body Model (HBM) ESD test. This rating is explicitly stated in the FEATURES section of the MSC0995.PDF datasheet and confirms robustness against electrostatic discharge during handling, automated assembly, and operational use in harsh environments.
1PMT5953A/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):
- 150 V
- Tolerance:
- ±10%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 600 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 114 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
1PMT5953A/TR7 FAQ
1.How can I place an order for 1PMT5953A/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5953A/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 1PMT5953A/TR7 reliable?
The price and inventory of 1PMT5953A/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5953A/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5953A/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5953A/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5953A/TR7?
1PMT5953A/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5953A/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 1PMT5953A/TR7?
For technical support, including 1PMT5953A/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5953A/TR7 requirements.
6.How does Aetrix verify that 1PMT5953A/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5953A/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 1PMT5953A/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5953A/TR7?
All 1PMT5953A/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5953A/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 1PMT5953A/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5953A/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5953A/TR7 Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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