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Microchip Technology 1PMT5942AE3/TR7
- Part No.:
- 1PMT5942AE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5942AE3/TR7.pdf
- Description:
- DIODE ZENER 51V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,539
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Product details
Overview
1PMT5942AE3/TR7 from Microsemi is a 51 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 70 Ω dynamic impedance at 7.3 mA test current and 1100 µA max reverse leakage at 38.8 V. It serves as a precision voltage reference or overvoltage clamp in power supply regulation circuits.
For engineers reviewing the 1PMT5942AE3/TR7 datasheet, 1PMT5942AE3/TR7 pinout, 1PMT5942AE3/TR7 application, or 1PMT5942AE3/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 Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its Powermite® package features a full metallic bottom and integral heat sink locking tab, enabling efficient thermal conduction directly from the junction to TAB 1 (cathode) with measured thermal resistance of 30°C/W.
The device delivers tight regulation with 70 Ω dynamic impedance at IZT = 7.3 mA and maintains low reverse leakage (≤1100 µA at VR = 38.8 V), supporting reliable clamping and reference functions in industrial power converters and protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 51 V ±5% at IZT = 7.3 mA - defines nominal regulation point with production tolerance band |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - sets maximum continuous thermal load under defined heatsinking condition |
| Dynamic Impedance ZZT | 70 Ω at IZT = 7.3 mA - determines voltage deviation under small-signal AC load variations |
| Reverse Leakage IR | ≤1100 µA at VR = 38.8 V - ensures minimal standby current in clamping applications |
| Thermal Resistance | 30°C/W junction-to-TAB 1 - quantifies thermal path efficiency for PCB-level heatsinking design |
| ESD Rating | >16 kV per Human Body Model - supports robust handling and board-level ESD immunity |
| Knee Current IZK | 0.25 mA - specifies minimum current to enter useful regulation region near VZ |
Pinout & Package
Package: Powermite® (DO-216AA), molded surface-mount package 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 thermal and electrical connection point; must be soldered to copper pour for thermal management |
| Lead 2 | Anode | Standard anode terminal; reverse-biased during Zener 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 mechanical anchoring and direct thermal path from junction to PCB copper via TAB 1 |
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving solder joint reliability and process yield |
| ESD rating >16 kV HBM | Reduces risk of field failure due to electrostatic discharge during handling or system operation |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Precision voltage reference providing stable 51 V reference for optocoupler-driven feedback loop. Use Value: Maintains ±5% output regulation across line/load/temperature with low dynamic impedance (70 Ω) minimizing feedback error. | Use Scenario: Clamping transient surges on 48 V telecom distribution rails. IC Role / Device Role / Timing Role: Shunt overvoltage protector diverting excess energy to ground when rail exceeds 51 V. Use Value: Absorbs up to 3.0 W continuously with thermal resistance of 30°C/W, preventing downstream IC damage. |
| Automated Test Equipment (ATE) Reference | Programmable Logic Controller (PLC) Input Protection |
Use Scenario: Providing calibrated reference voltage for DAC output monitoring in calibration subsystems. IC Role / Device Role / Timing Role: Stable Zener reference source for analog measurement circuitry requiring traceable 51 V level. Use Value: Tight 5% tolerance and low 1100 µA leakage at 38.8 V ensure measurement accuracy and minimal loading error. | Use Scenario: Protecting 24 V digital input channels against accidental 48 V miswiring or surge events. IC Role / Device Role / Timing Role: Clamp diode placed between input and ground to limit voltage to safe levels. Use Value: ESD rating >16 kV HBM and robust 3.0 W surge capability prevent latch-up or permanent damage in harsh factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF51A (ON Semiconductor) | Same 51 V nominal, 1.0 W rating, SOD-123 package, higher ZZT (100 Ω), lower ESD (8 kV HBM) | Limited to lower-power clamping; unsuitable for 3.0 W continuous dissipation | Select when board space is constrained and thermal load ≤1.0 W |
| BZX84-C51 (Nexperia) | 51 V ±5%, 300 mW rating, SOT-23 package, ZZT = 90 Ω, no specified ESD rating | Only viable for signal-level referencing; cannot replace 1PMT5942AE3/TR7 in power regulation | Choose only for low-current bias/reference where thermal performance is non-critical |
Compared with SMF51A and BZX84-C51, the 1PMT5942AE3/TR7 uniquely combines 3.0 W power handling, 30°C/W thermal resistance, and >16 kV ESD rating in a surface-mount package-making it the sole option for high-reliability, high-power Zener applications requiring both thermal and ESD robustness.
Availability
1PMT5942AE3/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, telecom surge protection, ATE reference subsystems, and PLC input protection requiring stable component supply and long-term manufacturability.
Supply support for 1PMT5942AE3/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 product line was engineered to deliver high-power surface-mount voltage regulation and protection in space-constrained, thermally demanding applications-bridging the performance gap between through-hole and standard SMT Zeners.
FAQ
What is the Zener voltage tolerance for 1PMT5942AE3/TR7?
The 1PMT5942AE3/TR7 has a standard Zener voltage tolerance of ±5% at IZT = 7.3 mA and TC = 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D respectively, but the base part number 1PMT5942AE3/TR7 specifies ±5%. This tolerance band defines the allowable variation in regulation voltage under nominal operating conditions.
How is thermal management implemented for 1PMT5942AE3/TR7?
Thermal management for 1PMT5942AE3/TR7 relies on direct conduction from the silicon junction to TAB 1 (cathode) via the Powermite® package's full metallic bottom and integral locking tab. With a specified thermal resistance of 30°C/W junction-to-TAB, effective PCB copper area under TAB 1 is required to dissipate its full 3.0 W rating at TAB temperature ≤60°C.
Is 1PMT5942AE3/TR7 compatible with standard SMT reflow processes?
Yes, 1PMT5942AE3/TR7 is designed for compatibility with standard lead-free reflow profiles. Its molded Powermite® package and full metallic bottom eliminate solder flux entrapment, improving solder joint integrity. The device is supplied in EIA-481 tape-and-reel format (7″ reel, 3000 pcs), optimized for pick-and-place automation and high-yield reflow assembly.
What is the maximum reverse leakage current for 1PMT5942AE3/TR7?
The maximum reverse leakage current for 1PMT5942AE3/TR7 is 1100 µA at VR = 38.8 V and TL = 30°C. This value is specified in the Electrical Characteristics table and reflects worst-case leakage under sub-Zener bias conditions-critical for low-power standby circuits and precision reference designs where leakage-induced error must be minimized.
Does 1PMT5942AE3/TR7 have a documented ESD rating?
Yes, 1PMT5942AE3/TR7 has a documented ESD rating of >16 kV per the Human Body Model (HBM), as stated in the FEATURES section of the MSC0995.PDF datasheet. This high rating supports robust handling during manufacturing and enhances system-level immunity against electrostatic discharge events in end equipment such as industrial controllers and telecom infrastructure.
1PMT5942AE3/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):
- 51 V
- Tolerance:
- ±10%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 38.8 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
1PMT5942AE3/TR7 FAQ
1.How can I place an order for 1PMT5942AE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5942AE3/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 1PMT5942AE3/TR7 reliable?
The price and inventory of 1PMT5942AE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5942AE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5942AE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5942AE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5942AE3/TR7?
1PMT5942AE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5942AE3/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 1PMT5942AE3/TR7?
For technical support, including 1PMT5942AE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5942AE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5942AE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5942AE3/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 1PMT5942AE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5942AE3/TR7?
All 1PMT5942AE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5942AE3/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 1PMT5942AE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5942AE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5942AE3/TR7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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