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Microchip Technology 1PMT5948A/TR7
- Part No.:
- 1PMT5948A/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5948A/TR7.pdf
- Description:
- DIODE ZENER 91V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,932
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Product details
Overview
1PMT5948A/TR7 from Microsemi is a 91 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 200 Ω dynamic impedance at 4.1 mA test current and 3000 µA max reverse leakage at 69.2 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails and regulator feedback networks.
For engineers reviewing the 1PMT5948A/TR7 datasheet, 1PMT5948A/TR7 pinout, 1PMT5948A/TR7 application, or 1PMT5948A/TR7 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (30°C/W junction-to-TAB), ESD robustness (>16 kV HBM), low knee impedance, and compatibility with automated SMT assembly using EIA-481 tape-and-reel packaging.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across its specified test current range. Its Powermite® package integrates a full metallic bottom and locking tab to enhance thermal conduction and mechanical stability during reflow soldering.
The device exhibits low reverse leakage (≤3000 µA at VR = 69.2 V), 30°C/W thermal resistance from junction to TAB 1, and is characterized at TL = 30°C with voltage measurement performed 20 seconds after DC current application per Note 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 91 V ±5% at IZT = 4.1 mA - defines stable clamping/reference point under nominal bias |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - sets maximum continuous DC power handling with defined thermal boundary |
| Dynamic Impedance (ZZT) | 200 Ω at IZT = 4.1 mA - indicates voltage regulation sensitivity to current variation |
| Reverse Leakage (IR) | ≤3000 µA at VR = 69.2 V - quantifies off-state conduction loss in clamping applications |
| Thermal Resistance | 30°C/W junction-to-TAB 1 - determines temperature rise per watt dissipated into PCB copper pad |
| ESD Rating | >16 kV per Human Body Model - ensures robustness against handling and board-level electrostatic discharge |
| Knee Impedance (ZZK) | 0.25 Ω at IZK = 1 mA - reflects low-voltage regulation capability near breakdown threshold |
Pinout & Package
The 1PMT5948A/TR7 uses a DO-216–compatible Powermite® surface-mount package with molded body and full metallic bottom. Cathode is designated by TAB 1; mounting orientation is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat-sinking terminal and electrical cathode connection; must be soldered to copper pour for thermal management |
| Lead 2 | Anode | Standard anode connection; electrically isolated from TAB 1 and used for circuit return path |
Key Features
| Feature | Design Value |
|---|---|
| Integral heat sink locking tab | Mechanically anchors device during reflow and improves thermal transfer from junction to PCB |
| Full metallic bottom | Eliminates solder flux entrapment and enables uniform thermal conduction across entire package underside |
| Automated insertion compatibility | Designed for pick-and-place and reflow processes per EIA-481 tape-and-reel standards (7″/13″ reels) |
| Tight Zener tolerance option | ±2% (suffix C) or ±1% (suffix D) available - supports high-accuracy reference designs beyond standard ±5% |
Applications
| DC Power Rail Clamping | Feedback Reference in SMPS |
|---|---|
Use Scenario: Protects 72–96 V DC distribution lines from transient overvoltage events such as load dump or inductive switching spikes. IC Role / Device Role / Timing Role: Voltage-clamping element placed between rail and ground, conducting only above 91 V to shunt excess energy. Use Value: Leverages 3.0 W power rating and 30°C/W thermal resistance to absorb repetitive 100–500 mJ transients without degradation. | Use Scenario: Provides stable 91 V reference for optocoupler-based feedback in isolated flyback converters delivering 48–110 V output. IC Role / Device Role / Timing Role: Precision Zener reference setting error amplifier trip point in secondary-side regulation loop. Use Value: ±5% tolerance and low 200 Ω dynamic impedance ensure consistent regulation setpoint across line/load/temperature variations. |
| Industrial Sensor Excitation | Overvoltage Protection in Telecom Line Cards |
Use Scenario: Supplies regulated excitation voltage to high-impedance resistive sensors (e.g., RTDs, strain gauges) in 80–100 V industrial analog front-ends. IC Role / Device Role / Timing Role: Stable voltage source referenced to system ground, decoupled via local ceramic capacitor. Use Value: Low reverse leakage (<3000 µA) minimizes current error in high-Z sensor bridges; 30°C/W thermal resistance maintains stability under ambient temperature swings. | Use Scenario: Guards Ethernet PHY interface ICs and line drivers on telecom line cards exposed to lightning-induced surges on 48 V backplane rails. IC Role / Device Role / Timing Role: Primary overvoltage clamp limiting rail voltage to ≤91 V during surge events. Use Value: >16 kV HBM ESD rating and robust 3.0 W surge capability enable compliance with GR-1089-CORE Level 3 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5365B | Same 91 V nominal Zener voltage, but DO-41 through-hole package; 5 W rating; higher thermal resistance (~65°C/W) | Requires manual or wave soldering; unsuitable for high-density SMT layouts | Select when legacy through-hole assembly or higher single-pulse surge capacity is required |
| BZX84-C91 | 91 V Zener in SOT-23; 300 mW rating; 200 Ω ZZT; no metallic thermal tab | Limited to low-power signal-level clamping; cannot handle sustained 3 W dissipation | Select only for space-constrained low-power logic-level protection where thermal mass is not critical |
Compared with 1N5365B and BZX84-C91, the 1PMT5948A/TR7 uniquely combines SMT compatibility, 3.0 W continuous power, and direct thermal coupling to PCB via TAB 1-making it optimal for high-reliability industrial power rail stabilization where both density and thermal performance matter.
Availability
1PMT5948A/TR7 is available at Aetrix Electronics and suitable for DC power rail clamping, SMPS feedback references, industrial sensor excitation, and telecom line card overvoltage protection requiring stable component supply and traceable sourcing.
Supply support for 1PMT5948A/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 diode family-including the 1PMT5948A/TR7-is engineered for high-power surface-mount voltage regulation in harsh environments where thermal management, ESD immunity, and automated assembly reliability are critical.
FAQ
What is the Zener voltage tolerance for 1PMT5948A/TR7?
The 1PMT5948A/TR7 has a standard Zener voltage tolerance of ±5% at 91 V, measured at IZT = 4.1 mA with TAB 1 held at 30°C. Tighter tolerances of ±2% (suffix C) and ±1% (suffix D) are available upon request. This tolerance directly impacts regulation accuracy in reference and clamping circuits, especially under varying temperature and current conditions.
How is thermal management handled in the 1PMT5948A/TR7 package?
The 1PMT5948A/TR7 uses a Powermite® package with a full metallic bottom and integral locking tab that functions as a primary thermal path. Its specified thermal resistance is 30°C/W from junction to TAB 1, meaning effective heat dissipation requires soldering TAB 1 to a sufficiently sized copper pour. This design eliminates flux entrapment and supports reliable operation at its full 3.0 W rating when properly mounted.
Is the 1PMT5948A/TR7 compatible with automated SMT assembly?
Yes, the 1PMT5948A/TR7 is fully compatible with automated surface-mount assembly. It ships in EIA-481 compliant tape-and-reel format (3,000 pieces per 7-inch reel), and its Powermite® package geometry is optimized for pick-and-place accuracy and reflow stability. The locking tab and flat metallic bottom prevent tombstoning and ensure coplanar solder joint formation during reflow.
What is the maximum reverse leakage current for 1PMT5948A/TR7?
The 1PMT5948A/TR7 has a maximum reverse leakage current of 3000 µA at a reverse voltage of 69.2 V, as specified in the Electrical Characteristics table. This value is critical for low-power standby circuits and high-impedance reference nodes, where excessive leakage could shift bias points or increase quiescent power consumption beyond acceptable limits.
Does the 1PMT5948A/TR7 meet industry ESD standards?
Yes, the 1PMT5948A/TR7 is rated for >16 kV per the Human Body Model (HBM), exceeding common industrial ESD immunity requirements. This robustness is achieved through internal process design and the protective characteristics of the Powermite® package, making the 1PMT5948A/TR7 suitable for use in environments prone to handling or system-level electrostatic discharge without additional external protection.
1PMT5948A/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):
- 91 V
- Tolerance:
- ±10%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 200 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 69.2 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
1PMT5948A/TR7 FAQ
1.How can I place an order for 1PMT5948A/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5948A/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 1PMT5948A/TR7 reliable?
The price and inventory of 1PMT5948A/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5948A/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5948A/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5948A/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5948A/TR7?
1PMT5948A/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5948A/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 1PMT5948A/TR7?
For technical support, including 1PMT5948A/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5948A/TR7 requirements.
6.How does Aetrix verify that 1PMT5948A/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5948A/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 1PMT5948A/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5948A/TR7?
All 1PMT5948A/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5948A/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 1PMT5948A/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5948A/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5948A/TR7 Tags
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BZX84C3V3LT1G
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