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Microchip Technology 1PMT5944B/TR7
- Part No.:
- 1PMT5944B/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5944B/TR7.pdf
- Description:
- DIODE ZENER 62V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,719
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Product details
Overview
1PMT5944B/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 power supply regulation circuits.
For engineers reviewing the 1PMT5944B/TR7 datasheet, 1PMT5944B/TR7 pinout, 1PMT5944B/TR7 application, or 1PMT5944B/TR7 equivalent, key selection criteria include its 62 V nominal Zener voltage, 3.0 W thermal capability via metallic tab, DO-216 mechanical outline, 30°C/W junction-to-tab thermal resistance, and ESD rating >16 kV HBM.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage under varying load and temperature conditions. Its Powermite® package integrates a full metallic bottom and locking tab that functions as both mechanical anchor and thermal path to PCB copper, enabling efficient heat transfer without flux entrapment.
The device exhibits low knee impedance (≤1500 Ω at IZK = 0.25 mA) and tight voltage regulation across its operating range. Electrical characteristics are specified at TL = 30°C with measurement performed 20 seconds after DC current application, per Micro Note 202 for voltage-current deviation analysis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V ±5% at IZT = 6.0 mA - defines clamping/reference level in regulation circuits |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - maximum steady-state thermal limit with tab heatsinking |
| Dynamic Impedance (ZZT) | 100 Ω at IZT = 6.0 mA - indicates voltage stability under small-signal AC variations |
| Reverse Leakage (IR) | 1500 µA max at VR = 47.1 V - sets minimum hold-off voltage before conduction begins |
| Junction-to-Tab Thermal Resistance | 30°C/W - quantifies thermal path efficiency from die to mounting tab |
| ESD Rating | >16 kV per Human Body Model - ensures robustness during automated handling and board assembly |
| Package Outline | DO-216 - standardized surface-mount footprint with cathode marked on TAB 1 |
Pinout & Package
Powermite® package: molded surface-mount case with full metallic bottom and integral locking tab (TAB 1), cathode designated by TAB 1, weight ≈ 0.016 g, mountable in any orientation.
| 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 and electrical performance |
| Lead 2 | Anode | Standard anode terminal; connects to circuit ground or lower potential node in shunt regulator configuration |
Key Features
| Feature | Design Value |
|---|---|
| Integral heat sink locking tab | Provides mechanical retention during reflow and direct thermal conduction path to PCB copper |
| Full metallic bottom | Eliminates solder flux entrapment risk, improving long-term reliability and solder joint integrity |
| Automated insertion compatibility | Designed for pick-and-place and auto-insertion equipment per EIA-481 tape-and-reel standard |
| Low reverse leakage | 1500 µA max at 47.1 V enables precise threshold detection in low-power monitoring circuits |
| Tight voltage tolerance option | Available in ±2% (suffix C) and ±1% (suffix D) for high-accuracy reference applications |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Used in optocoupler feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Zener reference providing stable 62 V threshold to drive optocoupler LED when output exceeds setpoint. Use Value: Enables accurate ±5% output regulation with minimal component count and no external biasing required. | Use Scenario: Placed across sensitive IC supply rails to clamp transient overvoltages above 62 V. IC Role / Device Role / Timing Role: Shunt protection device diverting surge current to ground before downstream components exceed absolute maximum ratings. Use Value: Absorbs up to 3.0 W transient energy with predictable 62 V clamping level and fast response due to low ZZT. |
| Industrial Sensor Signal Conditioning | Programmable Logic Controller Input Protection |
Use Scenario: Biasing and limiting analog sensor outputs (e.g., 4–20 mA transmitters) within safe ADC input range. IC Role / Device Role / Timing Role: Precision voltage limiter ensuring signal stays below 62 V while maintaining linearity under normal operation. Use Value: Prevents ADC saturation and protects front-end op-amps using only passive components with known 62 V breakdown. | Use Scenario: Installed on digital input channels of PLC modules to suppress EFT and surge events per IEC 61000-4-4/5. IC Role / Device Role / Timing Role: Primary overvoltage clamp protecting opto-isolator inputs against field-induced transients. Use Value: Leverages >16 kV HBM ESD rating and 30°C/W thermal resistance to survive repeated 2 kV/1 A surges without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ64A | 64 V standoff, 1500 W peak pulse power, TVS diode not Zener-regulated | Designed for transient suppression, not precision DC regulation | Select only for surge-only protection where DC accuracy is irrelevant |
| BZX84-C62 | 62 V ±5%, 300 mW power rating, SOT-23 package, 400°C/W thermal resistance | Limited to low-power biasing; cannot sustain 3.0 W continuous dissipation | Choose for space-constrained low-current references; avoid in power regulation roles |
Compared with SMCJ64A and BZX84-C62, the 1PMT5944B/TR7 uniquely combines 62 V Zener regulation, 3.0 W continuous power handling, and DO-216 thermal design-making it suitable for industrial power supply feedback and clamping where both precision and power endurance are required.
Availability
1PMT5944B/TR7 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial overvoltage clamps, and programmable logic controller input protection requiring stable component supply and traceable sourcing.
Supply support for 1PMT5944B/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 company specializing in high-reliability analog, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The Powermite® Zener series-including 1PMT5944B/TR7-is engineered for ruggedized surface-mount voltage regulation in high-temperature, high-power-density environments where thermal management and long-term stability are critical.
FAQ
What is the Zener voltage tolerance for 1PMT5944B/TR7?
The 1PMT5944B/TR7 has a standard Zener voltage tolerance of ±5% at 62 V, measured at IZT = 6.0 mA with TAB 1 held at 30°C. Tighter tolerances of ±2% (suffix C) and ±1% (suffix D) are available upon request. Voltage measurement must be completed within 20 seconds of DC current application to meet specification compliance.
How is thermal performance managed in the 1PMT5944B/TR7 package?
The 1PMT5944B/TR7 uses the Powermite® package with a full metallic bottom and integral locking tab (TAB 1) that serves as both mechanical anchor and primary thermal path. Its junction-to-tab thermal resistance is 30°C/W, enabling 3.0 W power dissipation when TAB 1 is maintained at 60°C-requiring adequate PCB copper area for heat spreading.
Can 1PMT5944B/TR7 be used in place of through-hole Zener diodes like 1N5248B?
No-1PMT5944B/TR7 is not a drop-in replacement for 1N5248B. While both are 62 V Zeners, 1PMT5944B/TR7 is a 3.0 W surface-mount device in DO-216 outline with cathode on TAB 1, whereas 1N5248B is a 0.5 W through-hole device in DO-35. Differences in power rating, thermal path, and mounting method require PCB redesign and thermal validation before substitution.
What is the maximum reverse leakage current for 1PMT5944B/TR7?
The maximum reverse leakage current for 1PMT5944B/TR7 is 1500 µA at VR = 47.1 V and TL = 30°C. This value reflects the device's ability to remain non-conductive below its Zener knee, supporting reliable voltage thresholding in sensing and protection circuits without excessive standby current draw.
Is 1PMT5944B/TR7 compatible with lead-free reflow processes?
Yes-1PMT5944B/TR7 is qualified for lead-free reflow per J-STD-020. Its Powermite® package withstands peak temperatures up to 260°C for 10 seconds. The full metallic bottom ensures uniform thermal expansion and eliminates flux entrapment, reducing voiding risk and enhancing solder joint reliability in RoHS-compliant manufacturing.
1PMT5944B/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
1PMT5944B/TR7 FAQ
1.How can I place an order for 1PMT5944B/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5944B/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 1PMT5944B/TR7 reliable?
The price and inventory of 1PMT5944B/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5944B/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5944B/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5944B/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5944B/TR7?
1PMT5944B/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5944B/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 1PMT5944B/TR7?
For technical support, including 1PMT5944B/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5944B/TR7 requirements.
6.How does Aetrix verify that 1PMT5944B/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5944B/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 1PMT5944B/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5944B/TR7?
All 1PMT5944B/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5944B/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 1PMT5944B/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5944B/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5944B/TR7 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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