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Microchip Technology 1PMT5944A/TR7
- Part No.:
- 1PMT5944A/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5944A/TR7.pdf
- Description:
- DIODE ZENER 62V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,459
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Product details
Overview
1PMT5944A/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 and regulator feedback paths.
For engineers reviewing the 1PMT5944A/TR7 datasheet, 1PMT5944A/TR7 pinout, 1PMT5944A/TR7 application, or 1PMT5944A/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 using EIA-481 tape-and-reel packaging.
Technical Context
This device operates as a two-terminal voltage-regulating diode with sharp Zener breakdown at nominal 62 V. Its Powermite® package integrates a full metallic bottom and locking tab to enhance thermal conduction and mechanical stability during reflow soldering.
Electrical behavior is defined at TL = 30°C with IZT = 6.0 mA; Zener voltage drift with temperature is managed via specified junction-to-TAB thermal resistance (30°C/W) and operating junction temperature range (–55°C to +150°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 62 V ±5% - stable regulation point for mid-range DC voltage references |
| Test Current | 6.0 mA - standardized bias condition for VZ measurement and impedance characterization |
| Dynamic Impedance | 100 Ω - low AC impedance ensures minimal output voltage variation under load transients |
| Max Reverse Leakage | 1500 µA at 47.1 V - defines minimum clamping threshold before full Zener conduction |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient suppression without external heatsinking |
| Thermal Resistance | 30°C/W junction-to-TAB - supports thermal design with direct PCB copper pour attachment to TAB 1 |
| ESD Rating | >16 kV HBM - provides robust handling in automated manufacturing and end-use environments |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral heat-sink locking tab; cathode designated by TAB 1; weight ≈ 0.016 g; DO-216 outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat path and electrical cathode connection; must be soldered to thermal pad for rated 3.0 W operation |
| Lead 2 | Anode | Standard anode terminal; mounted opposite TAB 1; no thermal function |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables high-density PCB layout while delivering 3.0 W power handling traditionally found in larger through-hole packages |
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term reliability and solder joint integrity |
| Integral heat-sink locking tab | Provides mechanical anchoring and direct thermal conduction path from junction to PCB copper pour |
| EIA-481 tape-and-reel packaging | Supports high-speed pick-and-place assembly with standard 7″ reel (3,000 pcs) and 13″ reel (12,000 pcs) |
| ESD robustness | >16 kV per Human Body Model ensures survivability during handling, testing, and system integration |
Applications
| DC Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated flyback or buck-derived auxiliary supplies. IC Role / Device Role / Timing Role: Precision shunt reference providing stable 62 V setpoint for optocoupler-driven control loop. Use Value: Tight ±5% VZ tolerance and low 100 Ω ZZT minimize output voltage drift across line/load/temperature. | Use Scenario: Clamping transient surges on 48 V telecom or industrial DC bus lines. IC Role / Device Role / Timing Role: Fast-acting crowbar element diverting excess energy to ground when bus exceeds 62 V. Use Value: 3.0 W power rating and 30°C/W thermal resistance allow sustained clamping without thermal runaway. |
| Programmable Voltage Monitor | Reference Source for ADC Biasing |
Use Scenario: Threshold detection in battery management systems monitoring 60 V nominal Li-ion stacks. IC Role / Device Role / Timing Role: Fixed-voltage comparator input reference enabling accurate state-of-charge estimation. Use Value: Low 1500 µA IR at 47.1 V ensures minimal quiescent current draw in always-on monitoring circuits. | Use Scenario: Providing stable bias voltage for 12-bit SAR ADC reference buffers in data acquisition modules. IC Role / Device Role / Timing Role: Low-noise, low-drift analog reference source decoupled from noisy digital supply rails. Use Value: 100 Ω dynamic impedance and >16 kV HBM ESD rating prevent reference corruption during board-level ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5355B | Same 62 V nominal, but DO-204AL (DO-41) through-hole package; higher thermal resistance (~65°C/W); no metallic bottom or locking tab | Requires manual or wave soldering; unsuitable for high-density SMT layouts or automated insertion | Select only if legacy through-hole assembly is mandated and thermal derating to ≤1.5 W is acceptable |
| BZX84-C62 | 62 V ±5%, SOT-23 package; rated 300 mW; 10x lower power handling; 250 Ω typical ZZT | Limited to low-power signal-level referencing; cannot sustain 3.0 W clamping pulses | Choose only for space-constrained logic-level biasing where 3.0 W capability is unnecessary |
Compared with 1N5355B and BZX84-C62, the 1PMT5944A/TR7 uniquely delivers 3.0 W surface-mount Zener performance with integrated thermal management-enabling compact, high-reliability designs in power conversion and protection without layout or assembly process compromise.
Availability
1PMT5944A/TR7 is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection circuits, and programmable voltage monitors requiring stable component supply and consistent Zener voltage accuracy.
Supply support for 1PMT5944A/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 applications.
The Powermite® Zener diode product line was engineered to deliver high-power surface-mount voltage regulation with superior thermal performance and manufacturability-targeting next-generation power supplies, telecom infrastructure, and ruggedized industrial controls.
FAQ
What is the Zener voltage tolerance for 1PMT5944A/TR7?
The 1PMT5944A/TR7 has a standard Zener voltage tolerance of ±5% at 62 V, measured at IZT = 6.0 mA and TAB 1 temperature of 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D respectively, but the base 1PMT5944A/TR7 uses the ±5% grade. This tolerance directly impacts regulation accuracy in feedback loops and voltage monitor thresholds.
How is thermal management handled in the 1PMT5944A/TR7 package?
The 1PMT5944A/TR7 uses the Powermite® package with a full metallic bottom and integral locking tab acting as the primary thermal path. Its specified junction-to-TAB thermal resistance is 30°C/W, meaning effective cooling requires direct soldering of TAB 1 to a thermally robust PCB copper pour. This design eliminates flux entrapment and enables reliable 3.0 W operation without external heatsinks.
Is the 1PMT5944A/TR7 compatible with automated SMT assembly?
Yes, the 1PMT5944A/TR7 is fully compatible with automated surface-mount assembly. It ships in EIA-481 standard tape-and-reel format (3,000 pcs per 7″ reel), features a mold compound optimized for reflow profiles, and includes a locking tab that enhances placement stability. Its DO-216 outline and cathode-marked TAB 1 ensure consistent orientation during pick-and-place operations.
What is the maximum reverse leakage current for 1PMT5944A/TR7?
The maximum reverse leakage current for 1PMT5944A/TR7 is 1500 µA at VR = 47.1 V, measured at TL = 30°C. This value defines the onset of significant conduction prior to full Zener breakdown and is critical for low-power monitoring circuits where standby current must remain minimal. Leakage increases with temperature and applied voltage, per the device's V-I curve.
Does the 1PMT5944A/TR7 meet any ESD immunity standards?
Yes, the 1PMT5944A/TR7 is rated for >16 kV per the Human Body Model (HBM) ESD test standard. This high immunity level is achieved through internal process design and packaging, making it suitable for use in environments prone to electrostatic discharge-such as automated manufacturing, field-deployed industrial equipment, and telecom line cards-without requiring additional external protection.
1PMT5944A/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:
- ±10%
- 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
1PMT5944A/TR7 FAQ
1.How can I place an order for 1PMT5944A/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5944A/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 1PMT5944A/TR7 reliable?
The price and inventory of 1PMT5944A/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5944A/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5944A/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5944A/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5944A/TR7?
1PMT5944A/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5944A/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 1PMT5944A/TR7?
For technical support, including 1PMT5944A/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5944A/TR7 requirements.
6.How does Aetrix verify that 1PMT5944A/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5944A/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 1PMT5944A/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5944A/TR7?
All 1PMT5944A/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5944A/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 1PMT5944A/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5944A/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5944A/TR7 Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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MM5Z5V1ST1G
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