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Microchip Technology 1PMT5954A/TR7
- Part No.:
- 1PMT5954A/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5954A/TR7.pdf
- Description:
- DIODE ZENER 160V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,970
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Product details
Overview
1PMT5954A/TR7 from Microsemi is a 160 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 700 Ω dynamic impedance at 2.3 mA test current and 121.6 mA maximum Zener current. It serves as a precision voltage reference or overvoltage clamp in industrial power supplies and telecom surge protection circuits.
For engineers reviewing the 1PMT5954A/TR7 datasheet, 1PMT5954A/TR7 pinout, 1PMT5954A/TR7 application, or 1PMT5954A/TR7 equivalent, key selection criteria include its 160 V nominal Zener voltage, 3.0 W thermal capability with metallic-tab heat sinking, low reverse leakage (≤6500 µA at 121.6 V), and ESD rating >16 kV HBM - all critical for high-reliability DC rail stabilization.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across load variations and temperature shifts. Its Powermite® package integrates a full metallic bottom and locking tab that directly conducts heat from the junction to the PCB pad, achieving 30°C/W thermal resistance from junction to TAB 1.
The device exhibits tight regulation at IZT = 2.3 mA, with knee current IZK = 0.25 mA and knee impedance ZZK = 700 Ω, enabling reliable turn-on behavior in low-current bias networks. Reverse leakage remains ≤6500 µA up to VR = 121.6 V, supporting robust clamping in transient suppression applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 160 V ±5% at IZT = 2.3 mA - defines precise clamping threshold for overvoltage protection |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient absorption without derating in compact layouts |
| Dynamic Impedance (ZZT) | 700 Ω at IZT = 2.3 mA - indicates moderate regulation stiffness under small-signal AC perturbations |
| Max Zener Current (IZM) | 121.6 mA - sets absolute DC current limit before thermal runaway at rated power |
| Reverse Leakage (IR) | ≤6500 µA at VR = 121.6 V - ensures minimal standby power loss in high-impedance bias networks |
| Thermal Resistance | 30°C/W junction-to-TAB 1 - quantifies heat transfer efficiency to PCB copper, critical for sustained power handling |
| ESD Rating | >16 kV per Human Body Model - provides intrinsic robustness against handling and system-level ESD events |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral locking tab acting as thermal path to PCB. Cathode is designated by TAB 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat sink interface; must be soldered to ≥1 cm² copper pour for rated 3.0 W operation |
| Lead 2 | Anode | Standard anode connection; reverse-biased during Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Full metallic bottom | Eliminates solder flux entrapment during reflow, ensuring void-free thermal interface and long-term reliability |
| Integral heat sink locking tab | Provides mechanical anchoring and direct thermal conduction path from junction to PCB pad |
| ESD rating >16 kV HBM | Reduces need for external ESD protection in board-level designs handling human interaction or cable ports |
| Compatible with automatic insertion | Enables high-throughput SMT assembly without manual handling or orientation concerns |
Applications
| Industrial Power Supply Regulation | Telecom Line Surge Clamping |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converters operating from 120–300 VDC input rails. IC Role / Device Role / Timing Role: Precision Zener reference providing stable 160 V reference for optocoupler-based feedback loop. Use Value: Maintains ±5% output regulation across line/load/temperature with no active components required. | Use Scenario: Protecting Ethernet PHY interfaces from lightning-induced surges on 48 V PoE lines. IC Role / Device Role / Timing Role: Primary shunt clamp absorbing >100 J transients before downstream TVS activation. Use Value: 3.0 W power rating and 30°C/W thermal resistance enable repeated surge handling without degradation. |
| Automotive Battery Monitoring | Medical Equipment Overvoltage Protection |
Use Scenario: Monitoring 12 V battery voltage via resistive divider into ADC, requiring stable reference above max battery swing. IC Role / Device Role / Timing Role: Zener clamp limiting divider node to 160 V during load-dump events (ISO 7637-2 Pulse 5a). Use Value: 160 V breakdown withstands 120 V load-dump peaks while maintaining low leakage at normal operation. | Use Scenario: Safeguarding analog front-end inputs in portable ultrasound devices exposed to ESD and defibrillation pulses. IC Role / Device Role / Timing Role: First-stage overvoltage protector on signal conditioning path prior to instrumentation amplifier. Use Value: >16 kV HBM ESD rating eliminates need for additional ESD diodes in space-constrained medical PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5375B | Same 160 V nominal Zener voltage but DO-204AL package; 5 W rating; higher thermal resistance (50°C/W) | Requires larger PCB footprint and heatsinking; less suitable for dense SMT layouts | Select when higher power margin is needed and board space allows through-hole or larger SMD placement |
| BZX85C160 | 160 V Zener in DO-41; 1.3 W rating; no metallic thermal tab; 100°C/W junction-to-ambient | Limited to low-duty-cycle clamping; unsuitable for continuous 3 W dissipation | Choose only for cost-sensitive, low-power reference use where thermal performance is secondary |
Compared with 1N5375B and BZX85C160, the 1PMT5954A/TR7 delivers superior thermal management in compact SMT form factor, enabling reliable 3.0 W operation without external heatsinks - essential for modern power-dense industrial and telecom modules.
Availability
1PMT5954A/TR7 is available at Aetrix Electronics and suitable for industrial power supply regulation, telecom line surge clamping, and automotive battery monitoring requiring stable component supply and consistent parametric performance across production lots.
Supply support for 1PMT5954A/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 semiconductor manufacturer specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The Powermite® Zener diode product line was designed for high-power-density voltage regulation and transient suppression in space-constrained, thermally demanding environments such as telecom infrastructure and industrial control systems.
FAQ
What is the Zener voltage tolerance for 1PMT5954A/TR7?
The 1PMT5954A/TR7 has a standard Zener voltage tolerance of ±5% at 160 V nominal, measured at IZT = 2.3 mA with TAB 1 held at 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D respectively, but the base 1PMT5954A/TR7 part uses the ±5% grade. This tolerance directly impacts accuracy in voltage reference applications.
How is thermal management achieved in the 1PMT5954A/TR7 Powermite® package?
The 1PMT5954A/TR7 achieves thermal management via its full metallic bottom and integral locking tab, which serve as a direct thermal conduction path from the silicon junction to the PCB copper. With a specified thermal resistance of 30°C/W junction-to-TAB 1, proper soldering of TAB 1 to ≥1 cm² of copper is required to sustain its 3.0 W DC power rating at TAB 1 = 60°C.
Can 1PMT5954A/TR7 be used in automatic SMT assembly lines?
Yes, the 1PMT5954A/TR7 is explicitly designed for compatibility with automatic insertion equipment. Its Powermite® package features symmetrical geometry and clear cathode marking (TAB 1), enabling reliable pick-and-place operation and consistent orientation during reflow. The full metallic bottom also prevents flux entrapment, reducing post-assembly cleaning requirements.
What is the maximum reverse leakage current for 1PMT5954A/TR7 at rated voltage?
The maximum reverse leakage current for 1PMT5954A/TR7 is 6500 µA at VR = 121.6 V, as specified in the electrical characteristics table. This value reflects worst-case leakage under conditions approaching maximum Zener current and is critical for evaluating standby power loss in high-impedance bias networks where the 1PMT5954A/TR7 may be employed.
Is the 1PMT5954A/TR7 RoHS compliant and halogen-free?
While the provided MSC0995.PDF datasheet does not specify RoHS or halogen-free status, Microsemi's Powermite® family products manufactured after 2006 are generally RoHS compliant. For definitive compliance verification of the 1PMT5954A/TR7, consult Microchip's official product change notices or contact Aetrix Electronics for certified material declarations tied to current production lots.
1PMT5954A/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):
- 160 V
- Tolerance:
- ±10%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 700 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 121.6 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
1PMT5954A/TR7 FAQ
1.How can I place an order for 1PMT5954A/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5954A/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 1PMT5954A/TR7 reliable?
The price and inventory of 1PMT5954A/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5954A/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5954A/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5954A/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5954A/TR7?
1PMT5954A/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5954A/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 1PMT5954A/TR7?
For technical support, including 1PMT5954A/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5954A/TR7 requirements.
6.How does Aetrix verify that 1PMT5954A/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5954A/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 1PMT5954A/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5954A/TR7?
All 1PMT5954A/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5954A/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 1PMT5954A/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5954A/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5954A/TR7 Tags
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MM5Z5V1ST1G
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