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Microchip Technology 1PMT5944BE3/TR7
- Part No.:
- 1PMT5944BE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5944BE3/TR7.pdf
- Description:
- DIODE ZENER 62V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,478
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Product details
Overview
1PMT5944BE3/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 1PMT5944BE3/TR7 datasheet, 1PMT5944BE3/TR7 pinout, 1PMT5944BE3/TR7 application, or 1PMT5944BE3/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 breakdown characteristics, designed for stable DC voltage reference or transient suppression where precise clamping at 62 V is required. Its Powermite® package integrates a full metallic bottom and locking tab to enhance thermal conduction and mechanical retention during reflow.
The 1PMT5944BE3/TR7 exhibits a nominal zener voltage of 62 V measured at 6.0 mA (IZT), with 100 Ω dynamic impedance (ZZT) and 1500 µA maximum reverse leakage (IR) at 47.1 V (VR). Junction-to-TAB thermal resistance is 30°C/W, enabling reliable operation up to +150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V ±5% at IZT = 6.0 mA - defines stable regulation point for reference or clamp circuits |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - determines maximum continuous power handling under thermal constraint |
| Dynamic Impedance (ZZT) | 100 Ω at IZT - indicates voltage stability under small-signal current variation |
| Reverse Leakage (IR) | ≤1500 µA at VR = 47.1 V - sets minimum off-state current in clamping applications |
| Thermal Resistance | 30°C/W junction-to-TAB - quantifies thermal path efficiency for heatsinking via TAB 1 |
| ESD Rating | >16 kV per Human Body Model - ensures robustness against handling-induced electrostatic discharge |
| Knee Current (IZK) | 0.25 mA - specifies lowest current at which regulation begins to stabilize |
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; mounting position unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat sink interface and electrical cathode connection; must be soldered to copper pour for thermal management |
| Lead 2 | Anode | Standard anode terminal; electrically isolated from TAB 1; connects to circuit ground or return path |
Key Features
| Feature | Design Value |
|---|---|
| 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 |
| EIA-481 tape-and-reel packaging | Enables high-speed automated placement with 3,000 units per 7-inch reel |
| Low reverse leakage | 1500 µA max at 47.1 V supports low-power standby modes without excessive quiescent loss |
| Wide operating temperature range | –55°C to +150°C junction/storage enables use in harsh industrial and automotive under-hood environments |
Applications
| Industrial Power Supply Monitoring | Automotive Engine Control Unit (ECU) Clamping |
|---|---|
Use Scenario: Monitoring 60 V battery-derived rail in programmable logic controller (PLC) backplane power distribution. IC Role / Device Role / Timing Role: Zener diode acting as overvoltage clamp and reference for supervisor IC input threshold. Use Value: 62 V regulation with 100 Ω ZZT ensures fast response to transients while maintaining <1% voltage deviation under load step changes. | Use Scenario: Protecting microcontroller ADC input from load-dump spikes on 42 V automotive subsystems. IC Role / Device Role / Timing Role: Standoff voltage limiter placed between sensor signal line and MCU analog input. Use Value: >16 kV HBM ESD rating and 3.0 W surge capability absorb ISO 7637-2 pulse 5a without degradation. |
| Telecom DC-DC Converter Reference | Renewable Energy Charge Controller Feedback |
Use Scenario: Providing stable 62 V reference for error amplifier in isolated flyback converter feedback loop. IC Role / Device Role / Timing Role: Precision voltage reference source for optocoupler-coupled feedback network. Use Value: ±5% VZ tolerance and low ZZT minimize output voltage drift across temperature and line variations. | Use Scenario: Regulating gate drive voltage for high-side MOSFET in solar MPPT buck converter. IC Role / Device Role / Timing Role: Zener clamp defining maximum gate-source voltage for SiC MOSFET driver stage. Use Value: 30°C/W thermal resistance allows direct TAB 1 mounting to heatsink, sustaining 3.0 W dissipation during sustained overvoltage events. |
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 with 64 V standoff, 1500 W peak pulse power, unidirectional; higher clamping voltage (70.1 V min) | Designed for transient surge suppression, not precision DC regulation | Select when protecting against ISO 7637-2 load dump, not for stable reference use |
| 1N5388B | Through-hole 62 V Zener in DO-15 package; 5 W rating but no integrated heat sink tab; thermal resistance ~50°C/W | Lacks surface-mount compatibility and optimized thermal path for high-density PCBs | Select only for legacy through-hole designs where rework or thermal constraints permit larger footprint |
Compared with SMCJ64A and 1N5388B, the 1PMT5944BE3/TR7 uniquely combines SMT manufacturability, 30°C/W thermal resistance via TAB 1, and tight 62 V regulation-making it optimal for space-constrained, thermally demanding DC reference or clamping roles where both precision and power handling matter.
Availability
1PMT5944BE3/TR7 is available at Aetrix Electronics and suitable for industrial power supply monitoring, automotive ECU clamping, telecom DC-DC converter reference, and renewable energy charge controller feedback requiring stable component supply and traceable sourcing.
Supply support for 1PMT5944BE3/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 semiconductor manufacturer specializing in high-reliability analog, mixed-signal, and RF solutions for aerospace, defense, industrial, and communications markets.
The Powermite® Zener diode product line delivers high-power surface-mount voltage regulation in compact packages, engineered for thermal performance and automated assembly in mission-critical power management systems.
FAQ
What is the zener voltage tolerance of the 1PMT5944BE3/TR7?
The 1PMT5944BE3/TR7 has a standard zener voltage tolerance of ±5% at 62 V, measured at 6.0 mA test current 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 uses the standard ±5% grade. This tolerance directly impacts voltage reference accuracy in feedback loops and clamping thresholds.
How is thermal management handled in the 1PMT5944BE3/TR7 package?
The 1PMT5944BE3/TR7 uses the Powermite® package with TAB 1 as the cathode and primary thermal interface. Its junction-to-TAB thermal resistance is 30°C/W, meaning 3.0 W dissipation raises junction temperature by 90°C above TAB temperature. Effective thermal design requires soldering TAB 1 to a ≥1 cm² copper pour to maintain junction ≤150°C under full load.
Is the 1PMT5944BE3/TR7 compatible with lead-free reflow processes?
Yes, the 1PMT5944BE3/TR7 is qualified for lead-free reflow per J-STD-020. Its molded Powermite® package withstands peak temperatures up to 260°C for 10 seconds. The full metallic bottom improves thermal uniformity during reflow, reducing risk of voiding or delamination compared to plastic-only SMD packages.
What does the "E3/TR7" suffix indicate in 1PMT5944BE3/TR7?
The "E3" denotes tape-and-reel packaging per EIA-481 standard with 3,000 units per 7-inch reel; "TR7" confirms this configuration. This differs from bulk or ammo-pack variants and ensures compatibility with high-speed pick-and-place equipment. The marking "944" on the device body identifies the 62 V variant within the 1PMT59xxB family.
Can the 1PMT5944BE3/TR7 be used in bidirectional protection circuits?
No-the 1PMT5944BE3/TR7 is a unidirectional Zener diode with cathode designated by TAB 1 and anode at Lead 2. It conducts only in reverse breakdown (cathode positive relative to anode). For bidirectional transient protection, a paired Zener or dedicated TVS array would be required; this device is intended for DC voltage reference or unidirectional clamping only.
1PMT5944BE3/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:
- ±5%
- 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
1PMT5944BE3/TR7 FAQ
1.How can I place an order for 1PMT5944BE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5944BE3/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 1PMT5944BE3/TR7 reliable?
The price and inventory of 1PMT5944BE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5944BE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5944BE3/TR7?
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4.How is shipping managed for 1PMT5944BE3/TR7?
1PMT5944BE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5944BE3/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 1PMT5944BE3/TR7?
For technical support, including 1PMT5944BE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5944BE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5944BE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5944BE3/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 1PMT5944BE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5944BE3/TR7?
All 1PMT5944BE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5944BE3/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 1PMT5944BE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5944BE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5944BE3/TR7 Tags
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