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Microchip Technology 1PMT5947B/TR7
- Part No.:
- 1PMT5947B/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5947B/TR7.pdf
- Description:
- DIODE ZENER 82V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,369
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Product details
Overview
1PMT5947B/TR7 from Microsemi is a 82 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 160 Ω dynamic impedance at 4.6 mA test current and 2500 µA max reverse leakage at 62.2 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails and regulator feedback paths.
For engineers reviewing the 1PMT5947B/TR7 datasheet, 1PMT5947B/TR7 pinout, 1PMT5947B/TR7 application, or 1PMT5947B/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 a nominal zener voltage of 82 V at 4.6 mA test current (IZT), exhibiting 160 Ω dynamic impedance (ZZT) and 2500 µA maximum reverse leakage (IR) at 62.2 V (VR). Its thermal resistance of 30°C/W from junction to TAB 1 enables reliable 3.0 W power handling when mounted on thermally adequate PCB copper.
The Powermite® package features a full metallic bottom and integral locking tab acting as a heat sink, eliminating solder flux entrapment and supporting automatic insertion. Cathode is unambiguously designated by TAB 1, and mechanical mounting orientation is unrestricted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 82 V ±5% at IZT = 4.6 mA - defines stable regulation point under nominal bias |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - sets maximum continuous DC power in thermally managed layout |
| Dynamic Impedance | 160 Ω at IZT - determines output voltage variation under load current changes |
| Reverse Leakage | 2500 µA max at VR = 62.2 V - limits standby current in high-impedance clamp applications |
| Thermal Resistance | 30°C/W junction-to-TAB 1 - quantifies temperature rise per watt, critical for thermal design |
| ESD Rating | >16 kV HBM - ensures robustness during handling and board assembly |
| Knee Current | 0.25 mA - minimum current needed to enter usable regulation region |
Pinout & Package
Package: Powermite® (DO-216AA), molded surface-mount package with full metallic bottom and integral heat-sink locking tab; cathode identified by TAB 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat-sinking terminal and electrical cathode connection; must be connected to ground or low-impedance return path |
| Lead 2 | Anode | Standard anode connection; polarity must be observed to ensure reverse-bias operation |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow while delivering 3.0 W power handling in compact footprint |
| Integral heat-sink locking tab | Provides direct thermal conduction path from junction to PCB copper via TAB 1 |
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term reliability and void-free solder joints |
| ESD robustness >16 kV HBM | Reduces risk of field failure due to electrostatic discharge during handling or system operation |
| ±5% zener voltage tolerance | Supports cost-effective precision regulation without requiring post-assembly trimming |
Applications
| DC Power Rail Clamping | Feedback Reference for Switching Regulators |
|---|---|
Use Scenario: Protecting 72–90 V DC bus against transient overvoltage events in industrial control systems. IC Role / Device Role / Timing Role: Zener clamping device shunting excess energy to ground when bus voltage exceeds 82 V. Use Value: Limits peak voltage to safe levels using its 3.0 W power rating and 30°C/W thermal resistance for sustained clamping. | Use Scenario: Providing stable 82 V reference for error amplifier feedback in isolated flyback or forward converters. IC Role / Device Role / Timing Role: Precision voltage reference setting output regulation threshold in secondary-side feedback loop. Use Value: ±5% tolerance and low dynamic impedance ensure tight output voltage regulation across line/load variations. |
| Overvoltage Protection in Telecom Line Cards | Programmable Threshold Detector |
Use Scenario: Safeguarding interface circuitry on -48 V telecom distribution boards against positive surges. IC Role / Device Role / Timing Role: Reverse-biased Zener conducting only above 82 V, diverting surge current away from sensitive ICs. Use Value: >16 kV HBM rating and low leakage (<2500 µA at 62.2 V) prevent false triggering and degradation. | Use Scenario: Triggering comparator-based shutdown when input voltage exceeds 82 V in battery management systems. IC Role / Device Role / Timing Role: Voltage threshold element establishing trip point for protection logic. Use Value: Sharp knee at 0.25 mA and stable VZ enable predictable, repeatable detection without hysteresis components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5947BTR | Same 82 V zener voltage, ±5% tolerance, but in DO-41 through-hole package; no metallic heat-sink tab; thermal resistance ~65°C/W | Requires manual or wave soldering; unsuitable for high-density SMT layouts or high-power SMT thermal management | Select only if legacy through-hole assembly or lower-cost non-SMT production is required |
| BZX84-C82LT1G | 82 V zener in SOT-23; 350 mW power rating; 300 Ω dynamic impedance; 100 nA leakage at 66 V | Limited to low-power signal-level clamping; cannot replace 3.0 W clamping or rail stabilization functions | Use only for low-current bias/reference where thermal and power constraints permit |
Compared with 1N5947BTR and BZX84-C82LT1G, the 1PMT5947B/TR7 uniquely delivers 3.0 W SMT-compatible power handling with integrated thermal management-enabling direct replacement of larger packages without layout redesign or thermal derating penalties.
Availability
1PMT5947B/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, and automotive body control modules requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for 1PMT5947B/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 was designed to deliver high-power surface-mount voltage regulation and clamping in space-constrained, thermally demanding environments-bridging the gap between traditional through-hole Zeners and modern SMT requirements.
FAQ
What is the zener voltage tolerance for 1PMT5947B/TR7?
The 1PMT5947B/TR7 has a standard zener voltage tolerance of ±5% at 82 V, measured at 4.6 mA test current with TAB 1 held at 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D, respectively, but the base 1PMT5947B/TR7 uses ±5%. This tolerance directly impacts regulation accuracy in feedback and clamping circuits.
How is thermal management handled in the 1PMT5947B/TR7 package?
The 1PMT5947B/TR7 uses the Powermite® package with an integral metallic locking tab (TAB 1) that acts as both cathode and primary heat sink. Its specified thermal resistance is 30°C/W junction-to-TAB 1, enabling full 3.0 W power dissipation when TAB 1 is soldered to sufficient copper area. The full metallic bottom prevents flux entrapment and improves thermal transfer.
Is the 1PMT5947B/TR7 compatible with automated SMT assembly?
Yes, the 1PMT5947B/TR7 is specifically designed for automated insertion and reflow soldering. It ships in EIA-481 compliant tape-and-reel format (7-inch reel: 3,000 pcs; 13-inch reel: 12,000 pcs) and features a locking tab geometry that ensures stable placement and alignment during pick-and-place operations.
What is the maximum reverse leakage current for 1PMT5947B/TR7?
The 1PMT5947B/TR7 has a maximum reverse leakage current of 2500 µA at a reverse voltage of 62.2 V (VR), tested at TL = 30°C. This value reflects worst-case leakage just below the zener knee and is critical for low-power standby circuits where quiescent current must be minimized.
Does the 1PMT5947B/TR7 have ESD protection built-in?
Yes, the 1PMT5947B/TR7 is rated for >16 kV per Human Body Model (HBM), as confirmed in the official Microsemi datasheet MSC0995. This high ESD rating enhances robustness during board handling, automated assembly, and end-use in electrically noisy environments-reducing field failures without external protection components.
1PMT5947B/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):
- 82 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 160 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 62.2 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
1PMT5947B/TR7 FAQ
1.How can I place an order for 1PMT5947B/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5947B/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 1PMT5947B/TR7 reliable?
The price and inventory of 1PMT5947B/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5947B/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5947B/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5947B/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5947B/TR7?
1PMT5947B/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5947B/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 1PMT5947B/TR7?
For technical support, including 1PMT5947B/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5947B/TR7 requirements.
6.How does Aetrix verify that 1PMT5947B/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5947B/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 1PMT5947B/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5947B/TR7?
All 1PMT5947B/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5947B/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 1PMT5947B/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5947B/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5947B/TR7 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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