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Microchip Technology 1PMT5946AE3/TR13
- Part No.:
- 1PMT5946AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5946AE3/TR13.pdf
- Description:
- DIODE ZENER 75V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,970
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Product details
Overview
1PMT5946AE3/TR13 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 5.0 mA test current (IZT), 140 Ω dynamic impedance (ZZT), and <2000 µA reverse leakage (IR) at 56 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails of industrial control modules.
For engineers reviewing the 1PMT5946AE3/TR13 datasheet, 1PMT5946AE3/TR13 pinout, 1PMT5946AE3/TR13 application, or 1PMT5946AE3/TR13 equivalent, key selection criteria include its 75 V nominal Zener voltage, 3.0 W thermal capability via metallic tab, DO-216 mechanical outline, ESD rating >16 kV HBM, and compatibility with automated SMT placement equipment.
Technical Context
This Zener diode operates in reverse breakdown mode to regulate or clamp voltage with tight voltage tolerance and low dynamic impedance. Its Powermite® package integrates a full metallic bottom and locking tab that directly conducts heat from the junction to PCB copper, enabling 3.0 W dissipation without external heatsinking when mounted on ≥1 sq-in copper area.
The device exhibits stable Zener characteristics across -55°C to +150°C junction temperature range, with knee current (IZK) of 0.25 mA and knee impedance (ZZK) of 2000 Ω - supporting reliable low-current regulation in standby or low-power monitoring circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 75 V ±5% at IZT = 5.0 mA, TL = 30°C - defines clamping threshold for overvoltage protection in 48–72 V DC systems. |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables robust operation in high-ambient industrial environments when thermally coupled to PCB copper. |
| Dynamic Impedance | 140 Ω at IZT - ensures minimal output voltage variation under load transients up to ±10% current change. |
| Reverse Leakage | <2000 µA at VR = 56 V - guarantees low quiescent current in always-on voltage monitor circuits. |
| Thermal Resistance | 30°C/W junction-to-TAB1 - allows accurate thermal modeling when using TAB 1 as primary heat path to PCB. |
| ESD Rating | >16 kV per Human Body Model - provides intrinsic handling robustness without additional board-level ESD protection. |
Pinout & Package
Package: Powermite® (DO-216AA), molded surface-mount package with full metallic bottom and integral heat-sink locking tab; cathode designated by TAB 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat conduction path and electrical cathode connection; must be soldered to ≥1 sq-in copper pour for rated 3.0 W dissipation. |
| Lead 2 | Anode | Standard anode terminal; electrically isolated from TAB 1; used for series connection in voltage reference chains. |
Key Features
| Feature | Design Value |
|---|---|
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term reliability and reducing post-assembly cleaning requirements. |
| Integral heat-sink locking tab | Provides mechanical anchoring and direct thermal conduction path from junction to PCB, enabling 3.0 W operation without external heatsink. |
| Automated insertion compatibility | DO-216AA footprint and symmetric geometry support high-yield pick-and-place placement at >25,000 UPH. |
| Low reverse leakage | <2000 µA at 56 V ensures minimal current draw in battery-backed or energy-harvesting applications. |
Applications
| Industrial Power Supply Monitoring | Telecom DC Rail Clamping |
|---|---|
Use Scenario: Real-time detection of overvoltage events on 48 V telecom distribution buses. IC Role / Device Role / Timing Role: Zener clamping element placed across bus to shunt fault current above 75 V threshold. Use Value: Prevents downstream converter damage during transient surges while maintaining <2000 µA standby leakage. | Use Scenario: Voltage reference for isolated feedback circuitry in AC/DC front-end supplies. IC Role / Device Role / Timing Role: Stable 75 V reference source for optocoupler-based error amplification. Use Value: ±5% tolerance and 140 Ω ZZT ensure consistent regulation across temperature and line/load variations. |
| Programmable Logic Controller I/O Protection | Motor Drive Gate Driver Bias Clamp |
Use Scenario: Input protection for 24–72 V digital input modules exposed to field wiring transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on signal conditioning node before opto-isolator input. Use Value: >16 kV HBM ESD rating withstands repeated electrostatic discharges without parameter shift. | Use Scenario: Clamp bias voltage on high-side gate driver ICs operating from 75 V bootstrap supplies. IC Role / Device Role / Timing Role: Zener regulator stabilizing gate driver VCC rail against switching noise. Use Value: 30°C/W junction-to-tab thermal resistance enables direct mounting to driver IC's thermal pad for shared cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5946BTR | Same 75 V VZ and ±5% tolerance, but in DO-41 axial package; no metallic tab; 1.2 W rating. | Limited to lower-power applications; requires through-hole assembly and external heatsinking above 1.2 W. | Select when legacy through-hole design or lower cost outweighs SMT density and thermal performance. |
| BZX84-C75 | 75 V VZ in SOT-23; 300 mW rating; 25 Ω ZZT; 100 nA IR at 60 V. | Suitable only for signal-level references; cannot handle >300 mW continuous dissipation. | Select for low-current biasing where space is critical and power is <300 mW. |
Compared with 1N5946BTR and BZX84-C75, the 1PMT5946AE3/TR13 uniquely delivers 3.0 W SMT power handling with integrated thermal path - making it the only option among the three capable of clamping sustained overvoltages in industrial 48–72 V systems without derating or auxiliary cooling.
Availability
1PMT5946AE3/TR13 is available at Aetrix Electronics and suitable for industrial power supply monitoring, telecom DC rail clamping, PLC I/O protection, and motor drive gate driver bias clamp applications requiring stable component supply and long-lifecycle availability.
Supply support for 1PMT5946AE3/TR13 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 specifically for high-power-density surface-mount voltage regulation and transient suppression in harsh-environment power systems where thermal performance and assembly reliability are critical.
FAQ
What is the Zener voltage tolerance of the 1PMT5946AE3/TR13?
The 1PMT5946AE3/TR13 has a standard Zener voltage tolerance of ±5% at 75 V, measured at 5.0 mA test current and TAB 1 temperature of 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D respectively, but the E3 suffix indicates the standard ±5% version. This tolerance remains stable across the full -55°C to +150°C operating junction temperature range.
How is thermal management implemented in the 1PMT5946AE3/TR13?
The 1PMT5946AE3/TR13 uses its metallic TAB 1 as the primary thermal conduction path, with a specified junction-to-TAB thermal resistance of 30°C/W. To achieve the full 3.0 W power rating, TAB 1 must be soldered to at least 1 square inch of 2-oz copper on the PCB. The full metallic bottom and locking tab eliminate flux entrapment and enhance mechanical and thermal integrity during reflow soldering.
Is the 1PMT5946AE3/TR13 compatible with automated SMT assembly processes?
Yes, the 1PMT5946AE3/TR13 is explicitly designed for compatibility with automated insertion equipment. Its DO-216AA (Powermite®) package features symmetrical geometry, defined tape-and-reel packaging per EIA-481, and mechanical stability that supports high-speed pick-and-place at rates exceeding 25,000 units per hour without misalignment or tombstoning.
What is the maximum reverse leakage current for the 1PMT5946AE3/TR13?
The maximum reverse leakage current (IR) for the 1PMT5946AE3/TR13 is 2000 µA at a reverse voltage (VR) of 56 V, measured at TL = 30°C. This value is confirmed in the manufacturer's electrical characteristics table and reflects worst-case leakage under specified test conditions - critical for low-power monitoring circuits where standby current must remain below 2.5 mA.
Does the 1PMT5946AE3/TR13 meet any ESD immunity standards?
Yes, the 1PMT5946AE3/TR13 has an ESD rating of >16 kV per the Human Body Model (HBM), as stated in the official Microsemi datasheet MSC0995. This level of inherent ESD robustness eliminates the need for additional board-level protection in many industrial and telecom applications, reducing BOM count and layout complexity.
1PMT5946AE3/TR13 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:
- ±10%
- 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
1PMT5946AE3/TR13 FAQ
1.How can I place an order for 1PMT5946AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5946AE3/TR13 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 1PMT5946AE3/TR13 reliable?
The price and inventory of 1PMT5946AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5946AE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5946AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5946AE3/TR13 transactions.
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4.How is shipping managed for 1PMT5946AE3/TR13?
1PMT5946AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5946AE3/TR13 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 1PMT5946AE3/TR13?
For technical support, including 1PMT5946AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5946AE3/TR13 requirements.
6.How does Aetrix verify that 1PMT5946AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5946AE3/TR13 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 1PMT5946AE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5946AE3/TR13?
All 1PMT5946AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5946AE3/TR13, 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 1PMT5946AE3/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5946AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5946AE3/TR13 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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