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Microchip Technology 1PMT5947AE3/TR7
- Part No.:
- 1PMT5947AE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5947AE3/TR7.pdf
- Description:
- DIODE ZENER 82V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,388
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Product details
Overview
1PMT5947AE3/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 of industrial control modules.
For engineers reviewing the 1PMT5947AE3/TR7 datasheet, 1PMT5947AE3/TR7 pinout, 1PMT5947AE3/TR7 application, or 1PMT5947AE3/TR7 equivalent, key selection criteria include its 82 V nominal Zener voltage, 3.0 W thermal capability with metallic-tab heat sinking, DO-216 mechanical outline, and ESD rating >16 kV HBM - all critical for ruggedized power management designs.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across its specified test current range (IZT = 4.6 mA). Its Powermite® package integrates a full metallic bottom and locking tab to enhance thermal conduction from junction to PCB pad, enabling stable 3.0 W power handling without external heatsinking.
The device exhibits low knee impedance (ZZK = 0.25 Ω) and maintains <2500 µA reverse leakage at VR = 62.2 V, supporting reliable clamping in transient-suppression circuits. Zener voltage tolerance is ±5% standard (suffix 'E'), with tighter options available via suffixes 'C' (±2%) and 'D' (±1%).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 82 V nominal at IZT = 4.6 mA - defines precise clamping/reference level in regulated supplies |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient suppression without derating in compact layouts |
| Dynamic Impedance (ZZT) | 160 Ω at IZT - ensures minimal voltage shift under load current variation |
| Reverse Leakage (IR) | ≤2500 µA at VR = 62.2 V - guarantees low standby power loss in always-on protection circuits |
| Thermal Resistance | 30°C/W junction-to-TAB1 - allows direct thermal path to PCB copper for passive cooling |
| ESD Rating | >16 kV per HBM - provides robust handling during automated assembly and field operation |
| Tolerance | ±5% (suffix 'E') - balances cost and accuracy for non-critical reference applications |
Pinout & Package
Package: Powermite® (DO-216AA), molded surface-mount case with full metallic bottom and integral heat-sink locking tab. Cathode designated by TAB 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat-sinking terminal; must be soldered to large copper area for thermal performance |
| Lead 2 | Anode | Standard anode connection; electrically isolated from TAB 1 |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow while delivering 3.0 W power handling in footprint smaller than DO-41 |
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term reliability and void-free solder joints |
| Integral heat-sink locking tab | Provides mechanical anchoring and direct thermal conduction path from junction to PCB |
| High ESD immunity | >16 kV HBM rating reduces risk of damage during handling, board assembly, and end-use environments |
| Tight Zener voltage tolerance options | ±1%, ±2%, or ±5% available - supports design flexibility across cost/performance tiers |
Applications
| Industrial Power Supply Clamping | Automotive Body Control Module Reference |
|---|---|
Use Scenario: Protects 24 V DC input rail against load-dump transients up to 60 V in programmable logic controllers. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage clamp, diverting surge current to ground when rail exceeds 82 V. Use Value: 3.0 W rating and 30°C/W thermal resistance allow sustained clamping without thermal runaway under repeated surges. | Use Scenario: Provides stable 82 V reference for microcontroller ADC calibration in vehicle door module power supervisors. IC Role / Device Role / Timing Role: Precision voltage reference source with ±5% tolerance and low temperature drift. Use Value: Low reverse leakage (<2500 µA) minimizes current draw on battery-backed circuits during sleep mode. |
| Telecom Line Card Overvoltage Protection | Medical Infusion Pump Power Monitoring |
Use Scenario: Guards Ethernet PHY interface power rails against induced surges from nearby AC wiring in network switches. IC Role / Device Role / Timing Role: Fast-response Zener clamp placed upstream of LDO regulators. Use Value: >16 kV HBM ESD rating prevents failure during board-level ESD events common in telecom equipment servicing. | Use Scenario: Monitors 48 V DC main supply integrity in safety-critical infusion pumps using voltage-divider feedback. IC Role / Device Role / Timing Role: Zener-based overvoltage detection node feeding comparator input. Use Value: Stable 82 V breakdown with tight ZZT (160 Ω) ensures repeatable trip point across operating temperature range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ82A | TVS diode (unidirectional), 82 V standoff, 1500 W peak pulse power, higher clamping voltage (~135 V) | Designed for high-energy transient suppression (IEC 61000-4-5), not precision regulation | Select for surge-only protection where voltage accuracy is secondary to energy absorption |
| BZX84-C82 | SOT-23 Zener, 82 V, 300 mW, 15 Ω ZZT, no metallic thermal tab | Limited to low-power bias/reference use; cannot sustain 3.0 W continuous dissipation | Select only for space-constrained low-current applications where thermal performance is not required |
Compared with SMCJ82A and BZX84-C82, the 1PMT5947AE3/TR7 uniquely combines 3.0 W continuous Zener regulation, DO-216 mechanical compatibility, and integrated thermal management - making it suitable for medium-power clamping and reference roles where both accuracy and thermal robustness are required.
Availability
1PMT5947AE3/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control units, telecom line cards, and medical power monitoring systems requiring stable component supply and traceable sourcing.
Supply support for 1PMT5947AE3/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 1PMT5947AE3/TR7, was engineered for surface-mount power regulation and transient suppression in space-constrained, thermally demanding environments.
FAQ
What is the Zener voltage tolerance for 1PMT5947AE3/TR7?
The 1PMT5947AE3/TR7 has a standard Zener voltage tolerance of ±5%, indicated by the 'E' suffix in the part number. This means its actual breakdown voltage falls between 77.9 V and 86.1 V when measured at IZT = 4.6 mA and TAB 1 = 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes 'C' and 'D', respectively, but are not applicable to this specific variant.
How is thermal management implemented in the 1PMT5947AE3/TR7 package?
The 1PMT5947AE3/TR7 uses Microsemi's Powermite® package with a full metallic bottom and integral locking tab that functions as both mechanical anchor and primary heat sink. Thermal resistance from junction to TAB 1 is 30°C/W, requiring direct soldering of TAB 1 to a large copper pour for effective heat dissipation. This design enables full 3.0 W power handling without external heatsinks.
Can 1PMT5947AE3/TR7 be used in place of through-hole Zeners like 1N5251B?
No - the 1PMT5947AE3/TR7 is not a drop-in replacement for 1N5251B due to fundamental differences in package, thermal path, and power rating. While both are 82 V Zeners, the 1PMT5947AE3/TR7 is a 3.0 W surface-mount device in DO-216, whereas the 1N5251B is a 500 mW through-hole device in DO-35. PCB layout, thermal design, and mounting process differ significantly.
What is the maximum reverse leakage current for 1PMT5947AE3/TR7 at rated voltage?
The maximum reverse leakage current for 1PMT5947AE3/TR7 is 2500 µA at VR = 62.2 V and TL = 30°C. This value is specified in the manufacturer's electrical characteristics table and reflects worst-case leakage under defined test conditions. Lower leakage occurs at voltages below VR, supporting low-power standby operation in battery-sensitive applications.
Is 1PMT5947AE3/TR7 compatible with standard SMT reflow profiles?
Yes - the 1PMT5947AE3/TR7 is qualified for standard lead-free reflow soldering per J-STD-020. Its molded Powermite® package withstands peak temperatures up to 260°C for 30 seconds. The full metallic bottom eliminates flux entrapment risks, ensuring reliable solder joint formation during automated assembly without post-process cleaning requirements.
1PMT5947AE3/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
1PMT5947AE3/TR7 FAQ
1.How can I place an order for 1PMT5947AE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5947AE3/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 1PMT5947AE3/TR7 reliable?
The price and inventory of 1PMT5947AE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5947AE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5947AE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5947AE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5947AE3/TR7?
1PMT5947AE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5947AE3/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 1PMT5947AE3/TR7?
For technical support, including 1PMT5947AE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5947AE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5947AE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5947AE3/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 1PMT5947AE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5947AE3/TR7?
All 1PMT5947AE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5947AE3/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 1PMT5947AE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5947AE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5947AE3/TR7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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SMAJ4744A-TP
Micro Commercial Co
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Diodes Incorporated
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