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Microchip Technology 1PMT5939AE3/TR7
- Part No.:
- 1PMT5939AE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5939AE3/TR7.pdf
- Description:
- DIODE ZENER 39V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,533
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Product details
Overview
1PMT5939AE3/TR7 from Microsemi is a 39 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 45 Ω dynamic impedance at 9.6 mA test current and 900 µA max reverse leakage at 32.7 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails of industrial control modules.
For engineers reviewing the 1PMT5939AE3/TR7 datasheet, 1PMT5939AE3/TR7 pinout, 1PMT5939AE3/TR7 application, or 1PMT5939AE3/TR7 equivalent, key selection criteria include its 39 V nominal Zener voltage, 3.0 W thermal capability with metallic-tab heat sinking, ESD rating >16 kV HBM, DO-216 mechanical outline, and compatibility with EIA-481 tape-and-reel automated assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage regulation under varying load and temperature conditions. Its Powermite® package integrates a full metallic bottom and locking tab that directly conducts heat from the junction to the PCB pad, achieving 30°C/W thermal resistance from junction to TAB 1.
The device exhibits low knee impedance (≤400 Ω) and tight voltage tolerance options (±1%, ±2% with suffixes D/C), with reverse leakage strictly limited to ≤900 µA at VR = 32.7 V - enabling reliable clamping in low-power sensing and protection circuits without parasitic loading.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V ±5% at IZT = 9.6 mA, TC = 30°C - defines precise clamping threshold for 3.3 V–48 V supply monitoring |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables sustained operation in compact industrial PCBs without external heatsinks |
| Dynamic Impedance (ZZT) | 45 Ω at IZT = 9.6 mA - ensures minimal output voltage shift under transient current changes |
| Reverse Leakage (IR) | ≤900 µA at VR = 32.7 V - prevents excessive quiescent current in battery-backed or low-power systems |
| Thermal Resistance | 30°C/W junction-to-TAB 1 - allows direct thermal coupling to copper pour for passive cooling |
| ESD Rating | >16 kV per Human Body Model - supports robust handling and operation in unshielded industrial environments |
Pinout & Package
Package: Powermite® (DO-216), molded surface-mount package with full metallic bottom and integral locking tab acting as thermal path to PCB. Cathode designated by TAB 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat-sinking terminal; must be soldered to ≥100 mm² copper area for rated 3.0 W dissipation |
| Lead 2 | Anode | Standard anode connection; no thermal function - routed as signal-level trace |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | DO-216 footprint with 3.0 W capability - replaces larger DO-41/DO-15 while maintaining thermal performance |
| Integral heat sink locking tab | Metallic TAB 1 provides direct junction-to-PCB thermal conduction - eliminates need for thermal vias or external heatsinks |
| Full metallic bottom | Prevents solder flux entrapment during reflow - improves long-term reliability and reduces post-assembly cleaning requirements |
| ESD robustness | >16 kV HBM - enables use in field-serviceable equipment without additional transient protection circuitry |
Applications
| Industrial Power Monitoring | Automated Test Equipment (ATE) |
|---|---|
Use Scenario: Monitoring 48 V DC bus voltage in programmable logic controller (PLC) backplanes to trigger brownout alarms. IC Role / Device Role / Timing Role: Zener reference diode providing stable 39 V threshold for comparator input. Use Value: Tight 5% tolerance and low 45 Ω dynamic impedance ensure alarm activation within ±0.5 V across temperature and aging. | Use Scenario: Protecting analog input channels of ATE digitizers from accidental 60 V transients during probe contact. IC Role / Device Role / Timing Role: Overvoltage clamp limiting input to 39 V before front-end op-amp stage. Use Value: 3.0 W surge capability absorbs 100 ms transients without degradation; metallic tab ensures repeatable clamping energy dissipation. |
| Medical Sensor Signal Conditioning | Telecom Line Card Protection |
Use Scenario: Biasing photodiode amplifiers in portable pulse oximeters powered by single-cell Li-ion batteries. IC Role / Device Role / Timing Role: Precision voltage reference establishing 39 V virtual ground for dual-supply op-amps. Use Value: ≤900 µA reverse leakage avoids loading high-impedance sensor nodes; DO-216 size fits space-constrained wearable PCBs. | Use Scenario: Clamping induced surges on -48 V telecom line cards exposed to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Primary shunt protector on DC feed line before DC/DC converter input. Use Value: 30°C/W thermal resistance enables safe dissipation of 3.0 W surge energy into chassis ground plane without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4739A | DO-41 through-hole package; 1.0 W rating; 39 V ±5%; 20 Ω ZZT at 31 mA | Requires PCB real estate for axial leads; unsuitable for high-density SMT lines | Select when legacy through-hole assembly or higher ZZT stability at higher IZ is prioritized over power density |
| BZX84-C39 | SOT-23 package; 300 mW rating; 39 V ±5%; 90 Ω ZZT at 5 mA | Limited to low-power signal rails; cannot sustain 3.0 W clamping events | Select only for bias/reference roles in sub-100 mW circuits where board space is critical |
Compared with 1N4739A and BZX84-C39, the 1PMT5939AE3/TR7 uniquely delivers 3.0 W power handling in a surface-mount DO-216 package with integrated thermal tab - making it the sole option among the three for industrial-grade overvoltage protection requiring both high energy absorption and automated assembly compatibility.
Availability
1PMT5939AE3/TR7 is available at Aetrix Electronics and suitable for industrial power monitoring, automated test equipment, medical sensor conditioning, and telecom line card protection requiring stable component supply and long-lifecycle support.
Supply support for 1PMT5939AE3/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 markets.
The Powermite® Zener diode product line was engineered to deliver high-power surface-mount voltage regulation with superior thermal performance - specifically targeting space-constrained, thermally demanding applications in industrial automation and infrastructure equipment.
FAQ
What is the Zener voltage tolerance for 1PMT5939AE3/TR7?
The 1PMT5939AE3/TR7 has a standard Zener voltage tolerance of ±5% at 39 V, measured at 9.6 mA test current and TAB 1 temperature of 30°C. Tighter tolerances of ±2% (suffix C) and ±1% (suffix D) are available as custom order options, but the E3/TR7 variant shipped is ±5%.
How is thermal management implemented in the 1PMT5939AE3/TR7 package?
The 1PMT5939AE3/TR7 uses Microsemi's Powermite® package with a full metallic bottom and integral locking tab (TAB 1) that serves as the cathode and primary thermal path. With a specified junction-to-TAB thermal resistance of 30°C/W, effective heat transfer requires soldering TAB 1 to a minimum 100 mm² copper area on the PCB.
Can 1PMT5939AE3/TR7 be used in automated SMT assembly lines?
Yes, the 1PMT5939AE3/TR7 is fully compatible with automated insertion and reflow processes. It ships in EIA-481 standard tape-and-reel format (7-inch reel, 3,000 pieces), and its Powermite® design includes features like a flux-trap-free metallic bottom and mechanical stability optimized for pick-and-place accuracy and thermal shock resilience.
What is the maximum reverse leakage current for 1PMT5939AE3/TR7?
The maximum reverse leakage current for 1PMT5939AE3/TR7 is 900 µA at a reverse voltage of 32.7 V and ambient temperature of 30°C. This value is guaranteed per the manufacturer's electrical characteristics table and reflects worst-case leakage under defined test conditions.
Does 1PMT5939AE3/TR7 meet any ESD immunity standards?
Yes, the 1PMT5939AE3/TR7 is rated for >16 kV electrostatic discharge per the Human Body Model (HBM), as confirmed in the official Microsemi datasheet MSC0995. This level of ESD robustness supports reliable handling and operation in industrial environments without requiring supplemental protection circuitry.
1PMT5939AE3/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):
- 39 V
- Tolerance:
- ±10%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 29.7 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
1PMT5939AE3/TR7 FAQ
1.How can I place an order for 1PMT5939AE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5939AE3/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 1PMT5939AE3/TR7 reliable?
The price and inventory of 1PMT5939AE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5939AE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5939AE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5939AE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5939AE3/TR7?
1PMT5939AE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5939AE3/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 1PMT5939AE3/TR7?
For technical support, including 1PMT5939AE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5939AE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5939AE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5939AE3/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 1PMT5939AE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5939AE3/TR7?
All 1PMT5939AE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5939AE3/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 1PMT5939AE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5939AE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5939AE3/TR7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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