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Microchip Technology 1PMT5955B/TR7
- Part No.:
- 1PMT5955B/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5955B/TR7.pdf
- Description:
- DIODE ZENER 180V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,875
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Product details
Overview
1PMT5955B/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 13.2 mA maximum Zener current. It serves as a precision voltage reference or overvoltage clamp in high-reliability industrial power supplies.
For engineers reviewing the 1PMT5955B/TR7 datasheet, 1PMT5955B/TR7 pinout, 1PMT5955B/TR7 application, or 1PMT5955B/TR7 equivalent, key selection criteria include its 180 V nominal Zener voltage, 3.0 W thermal rating with metallic-tab heatsinking, DO-216 mechanical outline, and ESD robustness (>16 kV HBM), critical for ruggedized DC-DC regulation and transient suppression.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across its specified test current (IZT = 2.1 mA) and temperature range (–55°C to +150°C junction/storage). Its full metallic bottom and integral locking tab provide direct thermal conduction from the die to PCB copper, enabling stable 3.0 W dissipation without external heatsinks.
The device exhibits low reverse leakage (≤1 µA at VR = 136.8 V), 900 Ω dynamic impedance at IZT, and knee current (IZK) of 0.25 mA - confirming sharp breakdown characteristics suitable for precision clamping. ESD rating exceeds 16 kV per Human Body Model, supporting use in unshielded industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 180 V ±5% at IZT = 2.1 mA, TL = 30°C - defines clamping threshold in overvoltage protection circuits |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient absorption without derating in compact layouts |
| Dynamic Impedance (ZZT) | 900 Ω at IZT = 2.1 mA - indicates moderate regulation stiffness; suitable for non-critical reference but robust for clamping |
| Max Reverse Current (IR) | ≤1 µA at VR = 136.8 V - ensures minimal leakage in standby or high-impedance sensing nodes |
| Thermal Resistance | 30°C/W junction-to-TAB1 - allows accurate thermal modeling when mounted on copper pour |
| ESD Rating | >16 kV per Human Body Model - supports handling and operation in electrostatic-prone assembly lines |
Pinout & Package
Package: Powermite® (DO-216), surface-mount molded case with full metallic bottom and integral heat-sink locking tab. Cathode is designated by TAB 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat path and electrical cathode connection; must be soldered to copper pour for thermal performance |
| Lead 2 | Anode | Standard anode terminal; routed to ground or low-impedance return in clamping configurations |
Key Features
| Feature | Design Value |
|---|---|
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term solder joint reliability and thermal interface consistency |
| 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 |
| DO-216 mechanical outline | Enables automated pick-and-place compatibility and consistent placement accuracy in high-volume SMT lines |
| ±5% Zener tolerance (standard) | Meets cost-sensitive industrial regulation requirements while maintaining predictable clamping behavior across production lots |
Applications
| Industrial Power Supply Clamping | DC-DC Converter Reference |
|---|---|
Use Scenario: Protection of 200 V-rated MOSFET gates against load-dump transients in 48 V telecom power systems. IC Role / Device Role / Timing Role: Voltage-clamping Zener diode placed between gate and source to limit peak stress. Use Value: 180 V breakdown with 3.0 W rating absorbs >100 mJ pulses without degradation, extending MOSFET lifetime. | Use Scenario: Stable voltage reference for feedback divider in isolated 12 V/5 A flyback converter. IC Role / Device Role / Timing Role: Precision Zener providing regulated bias to optocoupler input side. Use Value: Low 1 µA leakage at 136.8 V ensures minimal divider error; ±5% tolerance aligns with system-level output regulation spec. |
| Automotive Body Control Module | Test Equipment Overvoltage Protection |
Use Scenario: Input rail protection for microcontroller I/O pins exposed to 12 V battery line surges. IC Role / Device Role / Timing Role: Clamp diode shunting transients above 180 V to ground before reaching sensitive logic. Use Value: >16 kV HBM ESD rating prevents field failures during handling; DO-216 footprint fits tight BOM space constraints. | Use Scenario: Front-end protection for programmable power supply output terminals during fault testing. IC Role / Device Role / Timing Role: Sacrificial Zener absorbing accidental 200 V misconnections. Use Value: 3.0 W rating sustains 500 ms overvoltage events; metallic tab ensures repeatable thermal performance across test cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ180A | TVS diode, 180 V standoff, 3.0 kW peak pulse power, unidirectional, DO-214AB package | Designed for high-energy surge suppression (IEC 61000-4-5), not precision DC regulation | Select for lightning/surge immunity; avoid where low-leakage DC clamping is required |
| 1N5388B | 180 V Zener, 5 W rating, DO-201AD axial package, higher thermal resistance (~50°C/W) | Through-hole mounting only; lacks metallic thermal tab and SMT automation features | Select for legacy through-hole designs or higher continuous power needs; not drop-in compatible |
Compared with SMCJ180A and 1N5388B, the 1PMT5955B/TR7 uniquely combines SMT manufacturability, 3.0 W DC power handling via metallic-tab conduction, and low-leakage Zener regulation - making it optimal for space-constrained, thermally demanding industrial clamping where TVS speed or axial form factor are secondary.
Availability
1PMT5955B/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, DC-DC converters, and automotive body control modules requiring stable component supply and qualified SMT-compatible Zener clamping.
Supply support for 1PMT5955B/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 for aerospace, defense, and industrial markets.
The Powermite® Zener series, including the 1PMT5955B/TR7, was designed for high-power-density surface-mount voltage regulation and transient clamping in harsh-environment power systems where thermal management and assembly reliability are critical.
FAQ
What is the Zener voltage tolerance for the 1PMT5955B/TR7?
The 1PMT5955B/TR7 has a standard Zener voltage tolerance of ±5% at 180 V, measured at IZT = 2.1 mA and TAB temperature of 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D respectively, but the base 1PMT5955B/TR7 part uses the ±5% grade.
How is thermal performance achieved in the 1PMT5955B/TR7 without a traditional heatsink?
The 1PMT5955B/TR7 achieves 3.0 W thermal dissipation via its Powermite® package: the full metallic bottom and integral locking tab provide direct thermal conduction from the silicon junction to the PCB copper pour. Its specified thermal resistance is 30°C/W junction-to-TAB1, enabling effective passive cooling when properly mounted.
Is the 1PMT5955B/TR7 suitable for automotive applications?
Yes, the 1PMT5955B/TR7 is suitable for automotive body control modules and powertrain auxiliary circuits. Its –55°C to +150°C operating temperature range, >16 kV HBM ESD rating, and robust DO-216 surface-mount construction meet key requirements for under-hood and cabin electronics, though system-level qualification remains the designer's responsibility.
What does the "TR7" suffix indicate in 1PMT5955B/TR7?
The "TR7" suffix denotes tape-and-reel packaging per EIA Standard 481, with 3,000 pieces per 7-inch reel. This format ensures compatibility with automated SMT placement equipment and supports high-volume manufacturing workflows without manual handling.
Can the 1PMT5955B/TR7 replace axial-leaded Zeners like the 1N5388B in existing designs?
No, the 1PMT5955B/TR7 cannot serve as a direct replacement for axial-leaded devices such as the 1N5388B due to its DO-216 surface-mount footprint and different thermal path. While both regulate at 180 V, layout redesign and thermal validation are required to adopt the 1PMT5955B/TR7 in place of through-hole alternatives.
1PMT5955B/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:
- ±5%
- 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
1PMT5955B/TR7 FAQ
1.How can I place an order for 1PMT5955B/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5955B/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 1PMT5955B/TR7 reliable?
The price and inventory of 1PMT5955B/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5955B/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5955B/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5955B/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5955B/TR7?
1PMT5955B/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5955B/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 1PMT5955B/TR7?
For technical support, including 1PMT5955B/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5955B/TR7 requirements.
6.How does Aetrix verify that 1PMT5955B/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5955B/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 1PMT5955B/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5955B/TR7?
All 1PMT5955B/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5955B/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 1PMT5955B/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5955B/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5955B/TR7 Tags
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