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Microchip Technology 1PMT5947E3/TR7
- Part No.:
- 1PMT5947E3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5947E3/TR7.pdf
- Description:
- DIODE ZENER 82V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,260
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Product details
Overview
1PMT5947E3/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 compact DC power rails.
For engineers reviewing the 1PMT5947E3/TR7 datasheet, 1PMT5947E3/TR7 pinout, 1PMT5947E3/TR7 application, or 1PMT5947E3/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 on high-density PCBs.
Technical Context
This Zener diode operates as a two-terminal voltage reference and clamp device, with cathode designated by TAB 1 and full metallic bottom enabling direct thermal conduction to the PCB. Its DO-216 mechanical outline supports reflow and wave soldering without flux entrapment.
The device delivers stable 82 V regulation under DC bias at IZT = 4.6 mA, with tight knee characteristics (IZK = 0.25 mA, ZZK = 2500 Ω) and low forward voltage (1.2 V @ 200 mA), making it suitable for low-power sensing and protection circuits where thermal management and layout space are constrained.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 82 V ±5% - defines clamping threshold for overvoltage protection in 72–90 V nominal systems |
| Test Current IZT | 4.6 mA - operating point for specified VZ and ZZT; sets minimum bias for stable regulation |
| Dynamic Impedance ZZT | 160 Ω - determines voltage deviation under load transients; critical for regulation accuracy |
| Max Reverse Leakage IR | 2500 µA @ 62.2 V - limits standby power loss and false triggering in high-impedance sense nodes |
| Thermal Resistance θJ-TAB | 30°C/W - enables 3.0 W power dissipation with ≤30°C rise above TAB 1 temperature |
| ESD Rating (HBM) | >16 kV - ensures robustness during handling and board-level ESD events without parameter shift |
| Junction Temp Range | −55°C to +150°C - supports operation in automotive under-hood and industrial control environments |
Pinout & Package
Package: Powermite® (DO-216), 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 path and electrical cathode connection; must be soldered to copper pour for thermal and electrical performance |
| Lead 2 | Anode | Standard anode terminal; mounted opposite TAB 1 per DO-216 mechanical drawing |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow; eliminates through-hole drilling while maintaining 3.0 W power capability |
| Full metallic bottom | Prevents solder flux entrapment during assembly, 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 copper |
| Low knee impedance (ZZK = 2500 Ω) | Ensures stable regulation onset at low currents (IZK = 0.25 mA), supporting ultra-low-power bias networks |
| ESD rating >16 kV HBM | Eliminates need for external ESD protection in many interface and sensor front-end applications |
Applications
| Industrial Power Supply Monitoring | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Monitoring 72 V battery rail in 48 V mild-hybrid architectures to detect overvoltage faults before damage occurs. IC Role / Device Role / Timing Role: Voltage clamp and reference element in comparator-based fault detection circuit. Use Value: 82 V VZ provides 10 V margin above nominal 72 V rail; 30°C/W θJ-TAB allows direct PCB heatsinking without added thermal vias. | Use Scenario: Regulating auxiliary 12 V supply derived from 48 V bus using discrete linear regulator topology. IC Role / Device Role / Timing Role: Zener reference for feedback divider in adjustable LDO controller IC. Use Value: ±5% VZ tolerance ensures output voltage accuracy within ±0.6 V; low IR minimizes quiescent current draw. |
| Telecom DC-DC Converter Protection | Medical Infusion Pump Power Management |
Use Scenario: Clamping transient spikes on isolated 48 V telecom backplane due to hot-swap or load dump events. IC Role / Device Role / Timing Role: Primary overvoltage protection device placed across secondary-side output capacitor. Use Value: 3.0 W rating sustains 100 ms surge events; DO-216 footprint fits tight spacing between filter caps and connectors. | Use Scenario: Providing fail-safe voltage reference for microcontroller brown-out detection in battery-powered infusion pumps. IC Role / Device Role / Timing Role: Stable 82 V reference scaled via resistor divider to generate 2.5 V BOD threshold. Use Value: >16 kV HBM ESD rating prevents field failures during clinical handling; −55°C to +150°C range covers sterilization and ambient operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | Through-hole DO-41 package; 12 V VZ, 1 W rating; no metallic thermal pad | Not suitable for SMT or high-power density layouts; limited thermal performance | Select only if legacy through-hole assembly or <1 W dissipation is required |
| BZX84-C82LT1G | SOT-23 package; same 82 V VZ, but only 350 mW rating and 600 Ω ZZT | Cannot sustain 3.0 W surges; higher impedance degrades regulation under load variation | Use only in low-power signal conditioning; avoid in power rail protection |
Compared with 1N4742A and BZX84-C82LT1G, the 1PMT5947E3/TR7 uniquely combines SMT compatibility, 3.0 W power handling, and 30°C/W thermal resistance-enabling compact, thermally robust overvoltage protection where space and reliability are critical.
Availability
1PMT5947E3/TR7 is available at Aetrix Electronics and suitable for industrial power supply monitoring, automotive body control modules, telecom DC-DC converter protection, and medical infusion pump power management requiring stable component supply and long-term lifecycle support.
Supply support for 1PMT5947E3/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-tolerant components for aerospace, defense, and industrial markets.
The Powermite® Zener diode product line was designed specifically for surface-mount power regulation and transient suppression in space-constrained, thermally demanding applications where traditional axial or DO-41 packages cannot meet power or assembly requirements.
FAQ
What is the Zener voltage tolerance for 1PMT5947E3/TR7?
The 1PMT5947E3/TR7 has a standard Zener voltage tolerance of ±5% at 82 V, measured at IZT = 4.6 mA with TAB 1 held at 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D respectively, but the E3/TR7 variant specifies ±5%. This tolerance directly impacts regulation accuracy in feedback and protection circuits using the 1PMT5947E3/TR7.
How is thermal performance managed in the 1PMT5947E3/TR7 package?
The 1PMT5947E3/TR7 uses a Powermite® package with a full metallic bottom and TAB 1 as the cathode/thermal path, achieving 30°C/W junction-to-TAB thermal resistance. To realize rated 3.0 W dissipation, TAB 1 must be soldered to a sufficient copper area on the PCB. The integral locking tab enhances mechanical stability and thermal conduction-critical for reliability in thermally cycled environments where the 1PMT5947E3/TR7 is deployed.
Can the 1PMT5947E3/TR7 be used in automotive applications?
Yes, the 1PMT5947E3/TR7 is qualified for automotive use with a junction temperature range of −55°C to +150°C and >16 kV HBM ESD rating. Its DO-216 footprint and 3.0 W power rating make it suitable for 48 V mild-hybrid systems, such as body control module overvoltage clamping or DC-DC converter reference stabilization-provided PCB layout follows Microsemi's thermal guidelines for the 1PMT5947E3/TR7.
What is the maximum reverse leakage current for 1PMT5947E3/TR7?
The maximum reverse leakage current for 1PMT5947E3/TR7 is 2500 µA at VR = 62.2 V (75% of VZ). This value is specified in the Electrical Characteristics table and reflects worst-case leakage under stress conditions. Low IR ensures minimal standby power loss and avoids false triggering in high-impedance sensing circuits where the 1PMT5947E3/TR7 serves as a reference or clamp.
Is the 1PMT5947E3/TR7 compatible with standard SMT reflow profiles?
Yes, the 1PMT5947E3/TR7 is fully compatible with standard lead-free reflow profiles (J-STD-020). Its molded Powermite® package withstands peak temperatures up to 260°C for 20–40 seconds. The full metallic bottom eliminates flux entrapment risk, and the locking tab improves placement yield. For optimal thermal performance in final assembly, ensure adequate stencil design and solder paste volume for TAB 1 on the 1PMT5947E3/TR7.
1PMT5947E3/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:
- ±20%
- 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
1PMT5947E3/TR7 FAQ
1.How can I place an order for 1PMT5947E3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5947E3/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 1PMT5947E3/TR7 reliable?
The price and inventory of 1PMT5947E3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5947E3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5947E3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5947E3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5947E3/TR7?
1PMT5947E3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5947E3/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 1PMT5947E3/TR7?
For technical support, including 1PMT5947E3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5947E3/TR7 requirements.
6.How does Aetrix verify that 1PMT5947E3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5947E3/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 1PMT5947E3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5947E3/TR7?
All 1PMT5947E3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5947E3/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 1PMT5947E3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5947E3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5947E3/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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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
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SMAZ12-13-F
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