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Microchip Technology 1PMT5944CE3/TR7
- Part No.:
- 1PMT5944CE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5944CE3/TR7.pdf
- Description:
- DIODE ZENER 62V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,131
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Product details
Overview
1PMT5944CE3/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 dynamic impedance of 100 Ω at 6.0 mA test current and reverse leakage ≤1 µA at 47.1 V, used for precision voltage regulation and overvoltage protection in compact DC power rails.
For engineers reviewing the 1PMT5944CE3/TR7 datasheet, 1PMT5944CE3/TR7 pinout, 1PMT5944CE3/TR7 application, or 1PMT5944CE3/TR7 equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (30°C/W junction-to-TAB), ESD rating (>16 kV HBM), low knee impedance (≤1500 Ω), and compatibility with EIA-481 tape-and-reel automated assembly.
Technical Context
This Zener diode operates as a two-terminal voltage reference device, leveraging silicon PN-junction avalanche breakdown to maintain stable 62 V across its terminals under reverse bias. Its Powermite® package integrates a full metallic bottom and locking tab to enhance thermal conduction and mechanical stability during reflow soldering.
The device exhibits tight regulation at IZT = 6.0 mA, with ZZT = 100 Ω and ZZK = 1500 Ω at IZK = 0.25 mA, enabling reliable operation in low-current sensing and clamping circuits where low knee impedance and minimal reverse leakage (<1 µA at 47.1 V) are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V ±5% at IZT = 6.0 mA - defines regulated output voltage with production tolerance band |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - sets maximum continuous thermal load under standard mounting conditions |
| Dynamic Impedance (ZZT) | 100 Ω at IZT = 6.0 mA - determines voltage variation under small-signal AC load changes |
| Knee Impedance (ZZK) | 1500 Ω at IZK = 0.25 mA - indicates regulation onset sharpness for low-current biasing |
| Reverse Leakage (IR) | ≤1 µA at VR = 47.1 V - ensures minimal standby current in high-impedance clamp applications |
| Thermal Resistance | 30°C/W junction-to-TAB - quantifies temperature rise per watt dissipated into PCB copper pad |
| ESD Rating | >16 kV per Human Body Model - supports robust handling in unshielded manufacturing environments |
Pinout & Package
Package: Powermite® surface-mount molded case with full metallic bottom and integral heat sink locking tab; cathode designated by TAB 1; weight ≈ 0.016 g; compatible with EIA-481 tape-and-reel (7″ reel: 3,000 pcs).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat path and electrical cathode connection; must be soldered to copper pour for thermal management |
| Lead 2 | Anode | Standard anode terminal; mounted on PCB pad opposite TAB 1; no thermal function |
Key Features
| Feature | Design Value |
|---|---|
| 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 anchoring and direct thermal conduction path from junction to PCB copper |
| ESD robustness >16 kV HBM | Enables safe handling without ESD protection equipment in standard SMT lines |
| Compatible with automatic insertion | Designed for pick-and-place accuracy and tape-feed reliability per EIA-481 standards |
Applications
| DC Power Rail Clamping | Industrial Sensor Reference |
|---|---|
Use Scenario: Protecting 48 V DC input stages in PLC I/O modules against transient surges. IC Role / Device Role / Timing Role: Zener clamping device shunting excess energy to ground when voltage exceeds 62 V. Use Value: Maintains system integrity with <1 µA leakage at 47.1 V and 3.0 W surge-handling capacity. | Use Scenario: Providing stable 62 V reference for analog front-end calibration in industrial pressure transmitters. IC Role / Device Role / Timing Role: Precision voltage reference source with ±5% tolerance and low dynamic impedance. Use Value: Enables accurate sensor offset trimming with 100 Ω ZZT minimizing regulation error under load variation. |
| Automotive Body Control Unit | Telecom Power Supervision |
Use Scenario: Overvoltage detection in 24 V battery-supplied lighting control circuits. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as threshold detector triggering fault logic. Use Value: Reliable activation at 62 V with 30°C/W thermal resistance ensuring stable trip point across ambient temperatures. | Use Scenario: Monitoring -48 V telecom supply rail for brownout and overvoltage events. IC Role / Device Role / Timing Role: Clamp and reference element in discrete supervisor circuitry. Use Value: Supports fast response with 1500 Ω knee impedance and >16 kV HBM ESD immunity in field-deployed equipment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5944B | Same 62 V nominal Zener voltage, but DO-41 through-hole package; higher thermal resistance (~50°C/W) | Requires manual or wave soldering; unsuitable for high-density SMT layouts | Select 1PMT5944CE3/TR7 for automated assembly and improved thermal performance in space-constrained designs |
| SMBJ64A | 64 V standoff voltage, 600 W peak pulse power, TVS diode - not a Zener regulator | Designed for transient suppression only; lacks tight DC regulation and low leakage | Choose 1PMT5944CE3/TR7 when stable DC reference or precision clamping is required, not just surge protection |
Compared with 1N5944B and SMBJ64A, the 1PMT5944CE3/TR7 delivers superior thermal management (30°C/W vs. ~50°C/W), true Zener regulation (not transient-only), and automated SMT compatibility - making it optimal for compact, thermally demanding DC reference and clamping roles.
Availability
1PMT5944CE3/TR7 is available at Aetrix Electronics and suitable for industrial automation, telecom power supervision, automotive body control units, and sensor reference circuits requiring stable component supply with consistent Zener voltage tolerance and thermal performance.
Supply support for 1PMT5944CE3/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, and industrial markets.
The Powermite® Zener series, including 1PMT5944CE3/TR7, was designed for high-power-density surface-mount voltage regulation in harsh-environment systems where thermal efficiency and assembly robustness are critical.
FAQ
What is the Zener voltage tolerance for 1PMT5944CE3/TR7?
The 1PMT5944CE3/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 (±2%, ±1%) are available with suffixes C and D, but the CE3/TR7 variant specifies ±5%. This tolerance directly impacts regulation accuracy in precision reference applications.
How is thermal management handled in the 1PMT5944CE3/TR7 package?
The 1PMT5944CE3/TR7 uses the Powermite® package with a full metallic bottom and integral locking tab that serves as the primary thermal path. Its junction-to-TAB thermal resistance is 30°C/W, meaning proper soldering of TAB 1 to a copper pour is essential to achieve the rated 3.0 W power dissipation at TAB 1 = 60°C.
Is 1PMT5944CE3/TR7 suitable for automated SMT assembly?
Yes, the 1PMT5944CE3/TR7 is specifically designed for automated insertion and reflow soldering. It complies with EIA-481 tape-and-reel packaging standards (7″ reel: 3,000 pcs), features a locking tab for mechanical stability, and has a full metallic bottom to prevent flux entrapment - all verified in Microsemi's MSC0995 documentation.
What is the maximum reverse leakage current for 1PMT5944CE3/TR7?
The maximum reverse leakage current for 1PMT5944CE3/TR7 is 1 µA at VR = 47.1 V, as specified in the Electrical Characteristics table. This low leakage supports high-impedance bias networks and minimizes standby power loss in always-on protection circuits.
Does 1PMT5944CE3/TR7 have ESD protection built-in?
Yes, the 1PMT5944CE3/TR7 has an ESD rating exceeding 16 kV per the Human Body Model (HBM), as confirmed in the FEATURES section of the MSC0995 datasheet. This enables robust handling during board assembly without requiring additional ESD safeguards in standard manufacturing environments.
1PMT5944CE3/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:
- ±2%
- 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
1PMT5944CE3/TR7 FAQ
1.How can I place an order for 1PMT5944CE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5944CE3/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 1PMT5944CE3/TR7 reliable?
The price and inventory of 1PMT5944CE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5944CE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5944CE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5944CE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5944CE3/TR7?
1PMT5944CE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5944CE3/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 1PMT5944CE3/TR7?
For technical support, including 1PMT5944CE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5944CE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5944CE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5944CE3/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 1PMT5944CE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5944CE3/TR7?
All 1PMT5944CE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5944CE3/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 1PMT5944CE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5944CE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5944CE3/TR7 Tags
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