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Microchip Technology 1PMT5946CE3/TR7
- Part No.:
- 1PMT5946CE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5946CE3/TR7.pdf
- Description:
- DIODE ZENER 75V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,012
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Product details
Overview
1PMT5946CE3/TR7 from Microsemi is a 75 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 140 Ω dynamic impedance at 5.0 mA test current and <2000 µA reverse leakage at 60 V, used for precision voltage regulation in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1PMT5946CE3/TR7 datasheet, 1PMT5946CE3/TR7 pinout, 1PMT5946CE3/TR7 application, or 1PMT5946CE3/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 (≤140 Ω), and compatibility with EIA-481 tape-and-reel automated assembly.
Technical Context
This Zener diode operates as a two-terminal voltage reference device with cathode designated by TAB 1, requiring no external biasing circuitry. Its full metallic bottom and integral heat sink locking tab enable direct thermal conduction to PCB copper, supporting stable regulation under transient load conditions.
The device exhibits tight voltage regulation across temperature (–55°C to +150°C junction range) and maintains low reverse leakage (<2000 µA at VR = 60 V), enabling reliable clamping in industrial power converters and telecom line interface circuits where long-term stability and low drift are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 75 V ±5% at IZT = 5.0 mA - defines precise clamping threshold for overvoltage protection |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient suppression without derating in compact layouts |
| Dynamic Impedance | 140 Ω at IZT = 5.0 mA - ensures minimal output voltage variation under load current changes |
| Reverse Leakage | <2000 µA at VR = 60 V - guarantees low standby power loss and signal integrity in high-impedance nodes |
| Thermal Resistance | 30°C/W junction-to-TAB - allows direct thermal path to PCB ground plane for sustained power handling |
| ESD Rating | >16 kV per Human Body Model - provides robust handling during SMT assembly and field operation |
| Junction Temp Range | –55°C to +150°C - supports deployment in automotive engine control units and industrial motor drives |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral heat sink locking tab; cathode identified 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 large copper area for heat dissipation and voltage reference stability |
| Lead 2 | Anode | Standard anode terminal; mounted on PCB pad with standard reflow profile; no thermal function |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and eliminates through-hole drilling while retaining 3.0 W power capability of larger packages |
| Full metallic bottom | Prevents solder flux entrapment during reflow, reducing post-assembly cleaning requirements and void risk |
| Integral heat sink locking tab | Provides mechanical anchoring and direct thermal conduction path from junction to PCB, lowering effective thermal resistance |
| ESD robustness >16 kV HBM | Eliminates need for external ESD protection in board-level surge immunity designs for telecom and industrial interfaces |
| Tight Zener tolerance option | ±5% standard (suffix "E"); ±2% (suffix "C") and ±1% (suffix "D") available for high-accuracy reference applications |
Applications
| Switch-Mode Power Supply Feedback | Industrial Motor Drive Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Precision Zener reference establishing stable 75 V threshold for TL431-like error amplifier biasing. Use Value: Maintains ±1% output regulation across line/load/temperature due to low dynamic impedance (140 Ω) and tight voltage tolerance (±5%). | Use Scenario: Clamping DC bus overvoltage transients caused by regenerative braking in 48 V BLDC motor controllers. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing energy spikes up to 3.0 W without external drive circuitry. Use Value: Prevents IGBT gate driver IC damage by limiting bus voltage to ≤75 V with <2000 µA leakage at 60 V operating point. |
| Telecom Line Interface Protection | Automotive Engine Control Unit Reference |
Use Scenario: Protecting RS-485 transceivers from lightning-induced surges on outdoor data lines. IC Role / Device Role / Timing Role: Primary shunt clamp element in multi-stage TVS+Zener protection network. Use Value: Survives >16 kV HBM ESD events and dissipates 3.0 W transient energy without parametric shift, ensuring long-term reliability. | Use Scenario: Providing stable 75 V reference for knock sensor signal conditioning in gasoline direct injection ECUs. IC Role / Device Role / Timing Role: Temperature-stable voltage reference source operating from –40°C to +150°C junction range. Use Value: Delivers consistent regulation across extreme ambient conditions due to 30°C/W thermal resistance and –55°C to +150°C rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5946B | Same 75 V Zener voltage but in DO-41 through-hole package; 1.0 W rating; no metallic bottom or locking tab | Requires manual insertion or wave soldering; unsuitable for high-density SMT layouts or high-power thermal management | Select 1N5946B only when legacy through-hole assembly or lower-cost prototyping is required |
| BZX84-C75 | 75 V Zener in SOT-23; 300 mW rating; 200 Ω dynamic impedance; 100 µA max IR at 60 V | Limited to low-power signal-level clamping; cannot sustain 3.0 W transients or operate at TAB temperatures >60°C | Choose BZX84-C75 for space-constrained logic-level protection where power dissipation <0.3 W |
Compared with 1N5946B and BZX84-C75, the 1PMT5946CE3/TR7 uniquely combines surface-mount compatibility, 3.0 W power handling, and integrated thermal management-enabling robust voltage regulation in high-density, high-reliability power electronics where thermal performance and automated assembly are mandatory.
Availability
1PMT5946CE3/TR7 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial motor drives, telecom line interfaces, and automotive engine control units requiring stable component supply with full traceability and lifecycle support.
Supply support for 1PMT5946CE3/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 and mixed-signal components for aerospace, defense, industrial, and communications markets.
The Powermite® Zener diode product line was designed specifically for surface-mount power regulation and transient suppression applications demanding high wattage density, thermal robustness, and automated assembly compatibility in harsh environments.
FAQ
What is the Zener voltage tolerance for 1PMT5946CE3/TR7?
The 1PMT5946CE3/TR7 has a standard Zener voltage tolerance of ±5% at 75 V, measured at 5.0 mA test current with TAB 1 held at 30°C. Tighter tolerances of ±2% (suffix C) and ±1% (suffix D) are available upon request. This tolerance directly impacts regulation accuracy in feedback and clamping circuits using the 1PMT5946CE3/TR7.
How is thermal management handled in the 1PMT5946CE3/TR7 package?
The 1PMT5946CE3/TR7 uses a Powermite® package with a full metallic bottom and integral heat sink locking tab that conducts heat directly from the junction to the PCB copper. Its specified thermal resistance is 30°C/W junction-to-TAB, enabling reliable 3.0 W operation when TAB 1 is thermally anchored to a sufficient copper area-critical for sustained performance of the 1PMT5946CE3/TR7 in power applications.
Is the 1PMT5946CE3/TR7 compatible with automated SMT assembly processes?
Yes, the 1PMT5946CE3/TR7 is fully compatible with automated insertion equipment and standard reflow soldering profiles. It ships in EIA-481 tape-and-reel format (7-inch reel: 3,000 pieces; 13-inch reel: 12,000 pieces) and features a design that eliminates solder flux entrapment-ensuring high first-pass yield and process reliability for the 1PMT5946CE3/TR7 in high-volume manufacturing.
What is the maximum reverse leakage current for 1PMT5946CE3/TR7 at 60 V?
The maximum reverse leakage current for the 1PMT5946CE3/TR7 is 2000 µA at VR = 60 V, as specified in the Microsemi MSC0995 datasheet. This low leakage ensures minimal standby power loss and preserves signal integrity in high-impedance nodes where the 1PMT5946CE3/TR7 is deployed as a voltage clamp or reference.
Does the 1PMT5946CE3/TR7 have ESD protection built-in?
Yes, the 1PMT5946CE3/TR7 has an ESD rating exceeding 16 kV per the Human Body Model (HBM), verified per JEDEC JS-001. This intrinsic robustness eliminates the need for additional external ESD protection components in many applications, enhancing system-level reliability for the 1PMT5946CE3/TR7 in telecom, industrial, and automotive environments.
1PMT5946CE3/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):
- 75 V
- Tolerance:
- ±2%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 140 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 56 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
1PMT5946CE3/TR7 FAQ
1.How can I place an order for 1PMT5946CE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5946CE3/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 1PMT5946CE3/TR7 reliable?
The price and inventory of 1PMT5946CE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5946CE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5946CE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5946CE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5946CE3/TR7?
1PMT5946CE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5946CE3/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 1PMT5946CE3/TR7?
For technical support, including 1PMT5946CE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5946CE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5946CE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5946CE3/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 1PMT5946CE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5946CE3/TR7?
All 1PMT5946CE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5946CE3/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 1PMT5946CE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5946CE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5946CE3/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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Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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