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Microchip Technology 1PMT5939CE3/TR7
- Part No.:
- 1PMT5939CE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5939CE3/TR7.pdf
- Description:
- DIODE ZENER 39V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,926
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Product details
Overview
1PMT5939CE3/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 thermal resistance of 30°C/W junction-to-TAB1. It serves as a precision voltage reference or overvoltage clamp in power supply regulation and ESD-protected I/O circuits.
For engineers reviewing the 1PMT5939CE3/TR7 datasheet, 1PMT5939CE3/TR7 pinout, 1PMT5939CE3/TR7 application, or 1PMT5939CE3/TR7 equivalent, key selection criteria include zener voltage tolerance (±5%), ESD rating (>16 kV HBM), low reverse leakage (≤1 µA at 30 V), compatibility with automatic insertion equipment, and full metallic bottom for flux-free reflow assembly.
Technical Context
This device operates as a single-terminal voltage-regulating diode with cathode designated by TAB 1. Its Powermite® package integrates a locking tab that functions as an integral heat sink and provides direct thermal path to PCB copper, enabling 3.0 W dissipation under controlled thermal conditions.
The 1PMT5939CE3/TR7 exhibits tight knee characteristics (IZK = 0.25 mA, ZZK = 900 Ω) and low reverse leakage (IR ≤ 1 µA at VR = 30 V), supporting stable regulation in low-current bias networks and transient suppression where predictable turn-on behavior is critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 39 V ±5% at IZT = 9.6 mA - defines nominal clamping level for voltage reference or overvoltage protection |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-power regulation without external heatsink in thermally optimized layouts |
| Dynamic Impedance | 45 Ω at IZT - ensures minimal output voltage variation under load current changes |
| Thermal Resistance | 30°C/W junction-to-TAB1 - quantifies thermal path efficiency from die to mounting pad |
| ESD Rating | >16 kV per Human Body Model - provides robust protection against handling-induced electrostatic discharge |
| Reverse Leakage | ≤1 µA at VR = 30 V - guarantees low standby current in bias and sensing applications |
| Knee Current | 0.25 mA - specifies minimum current needed to enter regulated region with acceptable impedance |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral heat-sink locking tab; cathode designated by TAB 1; DO-216 outline; weight ≈ 0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary thermal and electrical connection point; must be soldered to copper pour for rated 3.0 W dissipation |
| Lead 2 | Anode | Standard anode terminal; mounted on PCB pad with standard SMT process |
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 retention and direct thermal conduction path from junction to PCB copper |
| ESD robustness | >16 kV HBM rating enables use in unshielded I/O lines without additional protection circuitry |
| Automatic insertion compatibility | Package geometry and terminal design support high-speed pick-and-place and wave soldering processes |
Applications
| Industrial Power Supply Regulation | Automotive Sensor Bias Network |
|---|---|
Use Scenario: Stabilizing reference voltage for feedback loops in 24 V DC-DC converters. IC Role / Device Role / Timing Role: Zener diode providing precise 39 V shunt reference for error amplifier input. Use Value: Tight 45 Ω dynamic impedance ensures <±0.5 V output deviation across 5–15 mA load variation. | Use Scenario: Biasing analog sensor outputs in engine control modules exposed to 12 V battery transients. IC Role / Device Role / Timing Role: Overvoltage clamp protecting ADC input from load-dump spikes up to 40 V. Use Value: 3.0 W power rating absorbs 100 ms transients without degradation; >16 kV HBM prevents ESD failure during assembly. |
| Telecom Line Interface Protection | Programmable Logic Controller I/O Conditioning |
Use Scenario: Secondary surge suppression on RS-485 data lines operating at ±12 V common-mode range. IC Role / Device Role / Timing Role: Shunt limiter clamping induced surges above 39 V while maintaining signal integrity below threshold. Use Value: Low 1 µA reverse leakage avoids loading high-impedance bus receivers; DO-216 footprint fits dense telecom board layouts. | Use Scenario: Input voltage conditioning for digital input cards accepting 24 V industrial signals. IC Role / Device Role / Timing Role: Zener-based voltage translator and transient suppressor on optocoupler input side. Use Value: Cathode-to-TAB1 thermal path allows sustained 3.0 W dissipation during repeated 24 V overvoltage events in factory-floor environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5939B | Same 39 V nominal zener voltage but in DO-41 through-hole package; no metallic bottom or locking tab; 1.0 W rating | Limited to lower-power, non-automated assembly; unsuitable for high-density SMT or thermal-critical designs | Select only when legacy through-hole layout or manual repair is required |
| BZX84-C39 | SOT-23 package; 39 V ±5%; 300 mW rating; 90 Ω dynamic impedance; no integrated heat sink | Not suitable for >300 mW continuous dissipation; requires external thermal relief for >100 mW operation | Choose for space-constrained logic-level clamping, not power regulation or surge absorption |
Compared with 1N5939B and BZX84-C39, the 1PMT5939CE3/TR7 uniquely delivers 3.0 W SMT power handling with built-in thermal management-enabling compact, high-reliability voltage clamping where thermal performance and automated manufacturability are essential.
Availability
1PMT5939CE3/TR7 is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor interfaces, telecom line protection, and PLC I/O conditioning requiring stable component supply and consistent parametric performance across production lots.
Supply support for 1PMT5939CE3/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 radiation-hardened components for aerospace, defense, and industrial markets.
The Powermite® Zener diode product line was designed to deliver high-power surface-mount voltage regulation with superior thermal performance and assembly robustness-targeting applications where traditional SMT Zeners fail under thermal or ESD stress.
FAQ
What is the zener voltage tolerance for 1PMT5939CE3/TR7?
The 1PMT5939CE3/TR7 has a nominal zener voltage of 39 V with a standard tolerance of ±5%, as specified in the MSC0995 datasheet. This tolerance applies at test current IZT = 9.6 mA and TAB temperature TL = 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D, but the CE3/TR7 variant uses the standard ±5% grade.
Can 1PMT5939CE3/TR7 be used in reflow soldering processes?
Yes, the 1PMT5939CE3/TR7 is qualified for standard SMT reflow processes. Its Powermite® package features a full metallic bottom that eliminates solder flux entrapment, and its construction supports peak temperatures up to 260°C per JEDEC J-STD-020. The device is supplied in EIA-481 tape-and-reel format compatible with automated placement equipment.
What is the maximum reverse leakage current for 1PMT5939CE3/TR7?
The maximum reverse leakage current for 1PMT5939CE3/TR7 is 1 µA at VR = 30 V, measured at TL = 30°C. This low leakage ensures minimal power loss in high-impedance bias networks and preserves accuracy in precision reference applications where standby current must remain negligible.
How is thermal performance specified for 1PMT5939CE3/TR7?
Thermal performance for 1PMT5939CE3/TR7 is defined by a junction-to-TAB1 thermal resistance of 30°C/W. The device achieves its full 3.0 W DC power rating only when TAB 1 is maintained at ≤60°C-requiring adequate PCB copper area and thermal vias beneath the metallic bottom for effective heat transfer.
Is 1PMT5939CE3/TR7 suitable for ESD protection in I/O lines?
Yes, the 1PMT5939CE3/TR7 is rated for >16 kV per Human Body Model (HBM), making it suitable for primary or secondary ESD protection on industrial and automotive I/O lines. Its fast turn-on and 3.0 W surge capability allow it to absorb multiple ESD events without parameter shift, provided the PCB layout maintains low-inductance paths to ground.
1PMT5939CE3/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:
- ±2%
- 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
1PMT5939CE3/TR7 FAQ
1.How can I place an order for 1PMT5939CE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5939CE3/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 1PMT5939CE3/TR7 reliable?
The price and inventory of 1PMT5939CE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5939CE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5939CE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5939CE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5939CE3/TR7?
1PMT5939CE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5939CE3/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 1PMT5939CE3/TR7?
For technical support, including 1PMT5939CE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5939CE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5939CE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5939CE3/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 1PMT5939CE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5939CE3/TR7?
All 1PMT5939CE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5939CE3/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 1PMT5939CE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5939CE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5939CE3/TR7 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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