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Microchip Technology 1PMT5947A/TR7
- Part No.:
- 1PMT5947A/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5947A/TR7.pdf
- Description:
- DIODE ZENER 82V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,879
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Product details
Overview
1PMT5947A/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, used for precision voltage regulation and overvoltage protection in industrial power supplies.
For engineers reviewing the 1PMT5947A/TR7 datasheet, 1PMT5947A/TR7 pinout, 1PMT5947A/TR7 application, or 1PMT5947A/TR7 equivalent, key selection criteria include zener voltage accuracy, thermal resistance (30°C/W junction-to-TAB), ESD rating (>16 kV HBM), low knee impedance, and compatibility with automated SMT assembly.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode designated by TAB 1. It delivers stable 82 V regulation under DC bias at IZT = 4.6 mA, with tight control of dynamic impedance (160 Ω) and knee impedance (≤400 Ω at IZK = 0.25 mA).
Designed for high-reliability surface-mount applications, it leverages a full metallic bottom to prevent solder flux entrapment and an integral locking tab acting as a heat sink, enabling efficient thermal transfer to the PCB pad while supporting automatic insertion equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 82 V ±5% at IZT = 4.6 mA - defines regulated output voltage under nominal bias |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - sets maximum continuous power handling with PCB thermal path |
| Dynamic Impedance ZZT | 160 Ω at IZT = 4.6 mA - determines voltage regulation stability under small-signal AC variations |
| Knee Current IZK | 0.25 mA - minimum current needed to enter useful regulation region |
| Reverse Leakage IR | 2500 µA max at VR = 62.2 V - quantifies off-state conduction loss in clamping mode |
| Thermal Resistance | 30°C/W junction-to-TAB - enables thermal design using PCB copper area as heatsink |
| ESD Rating | >16 kV per Human Body Model - ensures robustness during handling and board assembly |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral locking tab; cathode identified by TAB 1; mounting position unrestricted; weight ≈ 0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat-sinking terminal and voltage reference node; must be connected to ground or low-impedance return path |
| Lead 2 | Anode | Current entry point during reverse-bias operation; connects to unregulated input rail |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow; eliminates through-hole assembly steps |
| Integral heat sink locking tab | Direct metal thermal path from junction to PCB pad reduces thermal resistance to 30°C/W |
| Full metallic bottom | Prevents solder flux entrapment during reflow, improving long-term reliability and void-free solder joints |
| ESD rating >16 kV HBM | Eliminates need for external ESD protection in handling-sensitive environments |
| Low knee impedance (≤400 Ω) | Ensures stable regulation even at currents near turn-on threshold (IZK = 0.25 mA) |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing reference voltage for feedback loops in 48 V telecom DC-DC converters. IC Role / Device Role / Timing Role: Zener diode providing precise 82 V shunt reference for error amplifier input. Use Value: Maintains ±5% output voltage accuracy across temperature and load, leveraging 160 Ω dynamic impedance and 30°C/W thermal resistance. | Use Scenario: Clamping transient surges on 60 V battery management system (BMS) sense lines. IC Role / Device Role / Timing Role: Shunt protector diverting excess energy above 62.2 V to ground before IC damage occurs. Use Value: Withstands 2500 µA leakage at 62.2 V and absorbs 3.0 W peak power without degradation. |
| Automated Test Equipment (ATE) Reference | Programmable Logic Controller (PLC) Input Protection |
Use Scenario: Providing stable calibration voltage for 12-bit ADC references in modular ATE modules. IC Role / Device Role / Timing Role: Precision voltage reference with low drift due to minimal self-heating (30°C/W + 3 W rating). Use Value: Enables <±0.5% measurement repeatability over -40°C to +85°C ambient via tight 82 V ±5% tolerance and low IR. | Use Scenario: Protecting 24 V digital input channels from field-induced transients in factory automation panels. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp placed directly at connector entry point. Use Value: >16 kV HBM ESD rating prevents latch-up during cable hot-plug events; metallic bottom ensures reliable solder joint integrity. |
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 82 V nominal rating but DO-204AL package; higher thermal resistance (65°C/W); no metallic bottom or locking tab | Requires larger PCB pad for thermal management; not optimized for automated SMT | Select 1PMT5947A/TR7 when board space, thermal performance, or assembly automation are critical |
| BZX84-C82 | 82 V ±5% in SOT-23; rated for only 300 mW; dynamic impedance 100 Ω at 5 mA; no ESD rating specified | Limited to low-power signal-level clamping; unsuitable for 3 W power dissipation | Select 1PMT5947A/TR7 where sustained 3.0 W clamping or >16 kV ESD immunity is required |
Compared with 1N5365B and BZX84-C82, the 1PMT5947A/TR7 uniquely combines 3.0 W power handling, 30°C/W thermal resistance, and >16 kV HBM ESD rating in a surface-mount Powermite® package-enabling compact, high-reliability designs where thermal and surge robustness are non-negotiable.
Availability
1PMT5947A/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, automated test equipment, and programmable logic controller input stages requiring stable component supply and long-lifecycle support.
Supply support for 1PMT5947A/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 company specializing in high-reliability analog, mixed-signal, and RF solutions for aerospace, defense, industrial, and communications markets.
The Powermite® Zener diode product line-including 1PMT5947A/TR7-is engineered for ruggedized surface-mount voltage regulation and transient suppression in thermally constrained, high-volume industrial systems.
FAQ
What is the zener voltage tolerance for 1PMT5947A/TR7?
The 1PMT5947A/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% and ±1%) are available with suffixes C and D, respectively, but the /TR7 variant uses the standard ±5% grade.
How is thermal management handled in the 1PMT5947A/TR7 package?
The 1PMT5947A/TR7 uses a Powermite® package with an integral locking tab (TAB 1) that serves as both cathode and primary heat sink. Its 30°C/W junction-to-TAB thermal resistance allows effective heat transfer to the PCB copper pad, eliminating need for external heatsinks in most 3.0 W applications.
Is the 1PMT5947A/TR7 compatible with lead-free reflow processes?
Yes, the 1PMT5947A/TR7 is qualified for lead-free reflow soldering per J-STD-020. Its molded Powermite® package and metallic bottom withstand peak temperatures up to 260°C, and the device is supplied in EIA-481 tape-and-reel format compatible with standard SMT pick-and-place equipment.
What does the "/TR7" suffix indicate for 1PMT5947A/TR7?
The "/TR7" suffix denotes tape-and-reel packaging per EIA-481 standard, with 3,000 units per 7-inch reel. This packaging format ensures compatibility with high-speed automated assembly systems and supports consistent feeding and placement accuracy during SMT manufacturing.
Can 1PMT5947A/TR7 be used in place of older through-hole Zeners like 1N5365B?
While 1PMT5947A/TR7 shares the same 82 V nominal zener voltage as 1N5365B, it is not a drop-in replacement due to different package (Powermite® vs. DO-204AL), thermal path (TAB 1 vs. leads), and mounting method. PCB layout redesign is required-but the 1PMT5947A/TR7 offers superior thermal performance (30°C/W vs. 65°C/W) and SMT compatibility.
1PMT5947A/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:
- ±10%
- 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
1PMT5947A/TR7 FAQ
1.How can I place an order for 1PMT5947A/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5947A/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 1PMT5947A/TR7 reliable?
The price and inventory of 1PMT5947A/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5947A/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5947A/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5947A/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5947A/TR7?
1PMT5947A/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5947A/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 1PMT5947A/TR7?
For technical support, including 1PMT5947A/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5947A/TR7 requirements.
6.How does Aetrix verify that 1PMT5947A/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5947A/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 1PMT5947A/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5947A/TR7?
All 1PMT5947A/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5947A/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 1PMT5947A/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5947A/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5947A/TR7 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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