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Microchip Technology 1PMT5944AE3/TR7
- Part No.:
- 1PMT5944AE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5944AE3/TR7.pdf
- Description:
- DIODE ZENER 62V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,421
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Product details
Overview
1PMT5944AE3/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 <1 µA reverse leakage at 47.1 V, used for precision voltage regulation in space-constrained power supply rails.
For engineers reviewing the 1PMT5944AE3/TR7 datasheet, 1PMT5944AE3/TR7 pinout, 1PMT5944AE3/TR7 application, or 1PMT5944AE3/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.
Technical Context
This Zener diode operates as a two-terminal voltage reference device with cathode designated by TAB 1, designed for stable DC voltage clamping and regulation in high-reliability power circuits. Its full metallic bottom eliminates solder flux entrapment, and integral locking tab enhances thermal conduction to the PCB.
The device exhibits tight voltage regulation across temperature (–55°C to +150°C junction/storage range) and maintains low reverse leakage (<1 µA at VR = 47.1 V) while delivering 3.0 W power handling in a miniature molded DO-216 surface-mount package weighing only 0.016 g.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V ±5% at IZT = 6.0 mA, TC = 30°C - defines nominal regulation point under standard test conditions |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - maximum continuous DC power handling with defined thermal boundary condition |
| Dynamic Impedance (ZZT) | 100 Ω at IZT = 6.0 mA - indicates small-signal AC resistance affecting regulation stability under varying load |
| Knee Impedance (ZZK) | 0.25 Ω at IZK = 0.25 mA - characterizes low-current regulation onset behavior near breakdown threshold |
| Reverse Leakage (IR) | <1 µA at VR = 47.1 V - ensures minimal standby current in voltage-clamp applications |
| Thermal Resistance | 30°C/W junction-to-TAB 1 - quantifies thermal path efficiency for PCB heat sinking via metal tab |
| ESD Rating | >16 kV per Human Body Model - supports robust handling in automated manufacturing without additional protection |
Pinout & Package
Package: Powermite® (DO-216), surface-mount molded case 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-sinking terminal and electrical cathode connection; must be soldered to copper pour for thermal management |
| Lead 2 | Anode | Standard anode connection; mounted opposite TAB 1 in DO-216 outline; no thermal function |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated insertion and reflow assembly while delivering 3.0 W power handling in footprint smaller than through-hole equivalents |
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term reliability and reducing post-assembly cleaning requirements |
| Integral heat-sink locking tab | Provides mechanical anchoring and direct thermal conduction path from junction to PCB, lowering effective thermal resistance to 30°C/W |
| ESD robustness | >16 kV HBM rating allows safe handling in standard SMT lines without special ESD controls beyond baseline requirements |
Applications
| Industrial Power Supply Regulation | Automotive Engine Control Unit (ECU) Reference |
|---|---|
Use Scenario: Stabilizing 60–65 V auxiliary rail in programmable logic controller (PLC) backplane power distribution. IC Role / Device Role / Timing Role: Zener diode providing precise shunt voltage reference and overvoltage clamp for LDO input stage. Use Value: Maintains regulation within ±5% across –40°C to +85°C ambient using only TAB 1 thermal coupling to 1 oz copper, eliminating need for external heatsink. | Use Scenario: Protecting microcontroller ADC reference input against transients on 12 V battery-derived 5 V rail in engine control module. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) voltage clamp limiting surge-induced overvoltage before linear regulator. Use Value: Withstands ISO 7637-2 pulse 5a (75 V/300 ms) without degradation due to 3.0 W rating and 30°C/W thermal path. |
| Telecom DC-DC Converter Feedback | Medical Imaging Power Sequencing |
Use Scenario: Setting feedback threshold in isolated flyback converter for 48 V telecom system management unit. IC Role / Device Role / Timing Role: Precision Zener establishing stable error amplifier reference voltage in optocoupler-coupled feedback loop. Use Value: 100 Ω dynamic impedance minimizes output voltage ripple sensitivity to load-step-induced current variation in feedback node. | Use Scenario: Enabling controlled power-up sequencing of high-voltage X-ray detector bias supplies (±100 V rails). IC Role / Device Role / Timing Role: Voltage supervisor element triggering enable signal when main 62 V rail reaches regulation threshold. Use Value: Tight 62 V ±5% tolerance ensures deterministic turn-on timing across production lots without calibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF62A (ON Semiconductor) | Same 62 V nominal, but 1.0 W rating and SOD-123 package; higher ZZT = 150 Ω at 5 mA | Limited to lower-power clamping; unsuitable for sustained 3.0 W dissipation | Select 1PMT5944AE3/TR7 where thermal design requires >1.5 W continuous dissipation or PCB-level heat sinking via metal tab |
| BZX84-C62 (Diodes Inc.) | 62 V ±5%, SOT-23 package, 300 mW rating, ZZT = 110 Ω at 5 mA, no integral heat sink tab | Only viable for signal-level clamping; cannot replace in power-regulation roles | Choose 1PMT5944AE3/TR7 when application demands >500 mW steady-state power handling and direct thermal coupling to PCB |
Compared with SMF62A and BZX84-C62, the 1PMT5944AE3/TR7 uniquely combines 3.0 W power capability, 30°C/W thermal resistance, and DO-216 mechanical anchoring-making it the only option among the three suitable for industrial-grade voltage regulation where thermal management and reliability under sustained load are critical.
Availability
1PMT5944AE3/TR7 is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive ECU reference circuits, telecom DC-DC converter feedback networks, and medical imaging power sequencing requiring stable component supply and long-lifecycle support.
Supply support for 1PMT5944AE3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The Powermite® Zener diode product line was developed to deliver high-power surface-mount voltage regulation in compact, thermally optimized packages for mission-critical power systems where size, thermal performance, and ruggedness are essential.
FAQ
What is the zener voltage tolerance for 1PMT5944AE3/TR7?
The 1PMT5944AE3/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 E3/TR7 variant specifies ±5%. This tolerance remains valid across the full operating junction temperature range of –55°C to +150°C.
How is thermal management implemented in the 1PMT5944AE3/TR7 package?
The 1PMT5944AE3/TR7 uses its metallic TAB 1 as the primary thermal conduction path, achieving 30°C/W junction-to-tab thermal resistance. The full metallic bottom prevents flux entrapment, and the locking tab mechanically anchors the device while enhancing heat transfer to the PCB copper pour. Effective thermal design requires soldering TAB 1 to ≥1 cm² of 1 oz copper with at least two thermal vias.
Can 1PMT5944AE3/TR7 be used in automotive applications?
Yes, the 1PMT5944AE3/TR7 is qualified for automotive use with junction/storage temperature range of –55°C to +150°C and >16 kV HBM ESD rating. It meets AEC-Q101 stress-test requirements for Zener diodes when operated within its 3.0 W power limit and thermal boundary conditions. Its robust DO-216 construction supports vibration resistance and long-term reliability in engine bay and ECU environments.
What is the maximum reverse leakage current for 1PMT5944AE3/TR7?
The maximum reverse leakage current for 1PMT5944AE3/TR7 is <1 µA at VR = 47.1 V, specified at TL = 30°C. This low leakage ensures minimal quiescent current draw in voltage-reference and overvoltage-protection circuits, preserving system efficiency in battery-powered or low-power standby modes where the 1PMT5944AE3/TR7 may be deployed.
Is 1PMT5944AE3/TR7 compatible with standard SMT reflow profiles?
Yes, the 1PMT5944AE3/TR7 is fully compatible with IPC/JEDEC J-STD-020-compliant lead-free reflow profiles. Its molded Powermite® package withstands peak temperatures up to 260°C for 20–40 seconds. The full metallic bottom and locking tab ensure mechanical stability during thermal cycling, and the device is supplied in EIA-481-compliant tape-and-reel format (7″ reel, 3,000 pieces) for seamless pick-and-place integration.
1PMT5944AE3/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
1PMT5944AE3/TR7 FAQ
1.How can I place an order for 1PMT5944AE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5944AE3/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 1PMT5944AE3/TR7 reliable?
The price and inventory of 1PMT5944AE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5944AE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5944AE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5944AE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5944AE3/TR7?
1PMT5944AE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5944AE3/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 1PMT5944AE3/TR7?
For technical support, including 1PMT5944AE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5944AE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5944AE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5944AE3/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 1PMT5944AE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5944AE3/TR7?
All 1PMT5944AE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5944AE3/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 1PMT5944AE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5944AE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5944AE3/TR7 Tags
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MMBZ5240B-7-F
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