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Microchip Technology 1PMT5944/TR7
- Part No.:
- 1PMT5944/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5944/TR7.pdf
- Description:
- DIODE ZENER 62V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,192
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Product details
Overview
1PMT5944/TR7 from Microsemi is a 62 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 100 Ω dynamic impedance at 6.0 mA test current and 1500 µA max reverse leakage at 47.1 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails of industrial control modules.
For engineers reviewing the 1PMT5944/TR7 datasheet, 1PMT5944/TR7 pinout, 1PMT5944/TR7 application, or 1PMT5944/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 placement equipment.
Technical Context
This device operates as a single-junction, silicon planar Zener diode optimized for stable voltage regulation under steady-state DC bias. Its design centers on tight voltage tolerance control at IZT = 6.0 mA, with specified knee current (IZK = 0.25 mA) and knee impedance (ZZK = 1500 Ω), enabling reliable operation near breakdown threshold.
The Powermite® package integrates a full metallic bottom and locking tab that functions as both mechanical anchor and thermal path to PCB copper. Thermal resistance is fixed at 30°C/W from junction to TAB 1, and cathode polarity is unambiguously designated by TAB 1 per mechanical drawing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 62 V ±5% at IZT = 6.0 mA - defines nominal clamping level for overvoltage protection circuits |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - sets maximum continuous DC power handling with board-level heatsinking |
| Dynamic Impedance ZZT | 100 Ω at IZT = 6.0 mA - determines output voltage variation under load current changes |
| Reverse Leakage IR | ≤1500 µA at VR = 47.1 V - ensures minimal standby current in high-impedance bias networks |
| Thermal Resistance | 30°C/W junction-to-TAB 1 - quantifies temperature rise per watt dissipated into PCB copper pad |
| ESD Rating | >16 kV per Human Body Model - supports robustness in handling and assembly without external protection |
| Knee Current IZK | 0.25 mA - minimum current required to enter stable Zener conduction region |
Pinout & Package
Package: Powermite® surface-mount molded case with full metallic bottom and integral heat-sink locking tab; cathode designated by TAB 1; DO-216 outline; weight ≈ 0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary thermal and electrical connection point; must be soldered to copper pour for thermal management and circuit return |
| Lead 2 | Anode | Signal input terminal; connects to regulated node or voltage source requiring clamping |
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 retention and direct thermal path from junction to PCB copper, reducing thermal resistance to 30°C/W |
| ESD robustness | >16 kV HBM rating allows safe handling and integration into unshielded industrial environments without added protection |
Applications
| Industrial Power Supply Clamp | Programmable Logic Controller Input Protection |
|---|---|
Use Scenario: Clamps transient spikes on 48 V DC bus feeding PLC backplane logic. IC Role / Device Role / Timing Role: Zener diode acting as shunt overvoltage protector at input stage. Use Value: 62 V breakdown precisely guards against 50–60 V surges while maintaining <1500 µA leakage below clamp threshold. | Use Scenario: Protects 24 V digital input channels from field-wiring induced transients. IC Role / Device Role / Timing Role: Cathode-grounded shunt regulator limiting voltage seen by optocoupler input. Use Value: Low knee current (0.25 mA) ensures fast turn-on during surge events without loading normal 24 V signal levels. |
| Automated Test Equipment Reference | Motor Drive Gate Driver Bias Clamp |
Use Scenario: Provides stable 62 V reference for DAC output scaling in calibration subsystems. IC Role / Device Role / Timing Role: Precision voltage reference with ±5% tolerance and low dynamic impedance (100 Ω). Use Value: Tight VZ tolerance and predictable ZZT support repeatable 12-bit DAC full-scale adjustment. | Use Scenario: Limits gate drive voltage to IGBTs in 600 V motor inverters. IC Role / Device Role / Timing Role: Shunt clamp protecting gate driver IC from Miller-induced overshoot. Use Value: 3.0 W power rating and 30°C/W thermal resistance allow sustained clamping during PWM switching transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ64A | TVS diode, 64 V standoff, 100 W peak pulse power, higher capacitance (~150 pF) | Designed for transient suppression (IEC 61000-4-2/4-5), not DC regulation | Select when surge immunity > clamping accuracy is required; not suitable for precision reference use |
| BZX84-C62 | SOT-23 package, 300 mW power, 62 V ±5%, ZZT = 150 Ω at 5 mA | Limited thermal capacity; unsuitable for >100 mA continuous clamp current | Choose only for low-power signal-level clamping where PCB space is critical and power <0.3 W |
Compared with SMCJ64A and BZX84-C62, the 1PMT5944/TR7 uniquely balances 3.0 W DC power handling, 100 Ω dynamic impedance, and 30°C/W thermal resistance in a surface-mount package-making it suitable for sustained voltage regulation where TVS devices lack stability and small-signal Zeners lack power margin.
Availability
1PMT5944/TR7 is available at Aetrix Electronics and suitable for industrial power supply clamp, PLC input protection, automated test equipment reference, and motor drive gate driver bias clamp applications requiring stable component supply across multi-year production cycles.
Supply support for 1PMT5944/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-including 1PMT5944/TR7-was engineered for high-power surface-mount voltage regulation in space-constrained, thermally demanding industrial systems where legacy through-hole packages were impractical.
FAQ
What is the Zener voltage tolerance for 1PMT5944/TR7?
The 1PMT5944/TR7 has a standard Zener voltage tolerance of ±5% at IZT = 6.0 mA and TC = 30°C. Tighter tolerances (±2% with suffix C, ±1% with suffix D) are available as custom order variants but are not applicable to the standard 1PMT5944/TR7 marking or reel packaging.
How is cathode identification implemented on 1PMT5944/TR7?
The cathode of the 1PMT5944/TR7 is unambiguously designated by TAB 1, as confirmed in the mechanical specifications section of the MSC0995 datasheet. This metallic tab serves as both the cathode terminal and primary thermal interface, and must be connected to circuit ground or the lowest potential node in shunt regulator configurations.
What is the maximum continuous power dissipation for 1PMT5944/TR7?
The 1PMT5944/TR7 is rated for 3.0 W DC power dissipation when the temperature of TAB 1 is maintained at 60°C. This rating assumes adequate PCB copper area for heat spreading; derating is required above 60°C TAB temperature per the device's thermal resistance of 30°C/W.
Does 1PMT5944/TR7 require external heat sinking?
No external heat sink is required for the 1PMT5944/TR7. Its Powermite® package incorporates an integral locking tab (TAB 1) that functions as a direct thermal path to the PCB copper. Achieving the full 3.0 W rating depends on proper soldering to ≥1 cm² of 2-oz copper pour, per Microsemi's thermal guidelines in Application Note AN-1002.
What is the reverse leakage current specification for 1PMT5944/TR7?
The 1PMT5944/TR7 specifies a maximum reverse leakage current of 1500 µA at VR = 47.1 V and TL = 30°C. This value reflects worst-case leakage just below the Zener knee and ensures minimal parasitic loading in high-impedance bias networks upstream of the regulated node.
1PMT5944/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):
- 62 V
- Tolerance:
- ±20%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 100 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 47.1 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
1PMT5944/TR7 FAQ
1.How can I place an order for 1PMT5944/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5944/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 1PMT5944/TR7 reliable?
The price and inventory of 1PMT5944/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5944/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5944/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5944/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5944/TR7?
1PMT5944/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5944/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 1PMT5944/TR7?
For technical support, including 1PMT5944/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5944/TR7 requirements.
6.How does Aetrix verify that 1PMT5944/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5944/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 1PMT5944/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5944/TR7?
All 1PMT5944/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5944/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 1PMT5944/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5944/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5944/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
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
Diodes Incorporated
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