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Microchip Technology 1PMT5946AE3/TR7
- Part No.:
- 1PMT5946AE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5946AE3/TR7.pdf
- Description:
- DIODE ZENER 75V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,761
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Product details
Overview
1PMT5946AE3/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 5.0 mA test current, 140 Ω dynamic impedance, and 2000 µA max reverse leakage at 1 V. It serves as a precision voltage reference or overvoltage clamp in compact DC power rails and regulator feedback networks.
For engineers reviewing the 1PMT5946AE3/TR7 datasheet, 1PMT5946AE3/TR7 pinout, 1PMT5946AE3/TR7 application, or 1PMT5946AE3/TR7 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 assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across load variations and temperature shifts. Its Powermite® package integrates a full metallic bottom (TAB 1) as cathode and heat sink, enabling direct thermal conduction to PCB copper, with thermal resistance of 30°C/W junction-to-TAB1.
The device exhibits low knee impedance (ZZK = 0.25 Ω) and tight regulation at IZT = 5.0 mA, supporting reliable clamping in transient suppression circuits and accurate voltage referencing in analog signal conditioning where ±5% initial tolerance suffices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 75 V ±5% at IZT = 5.0 mA - defines clamping threshold in overvoltage protection and reference accuracy in feedback loops |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables robust operation in space-constrained power supplies without external heatsinking |
| Dynamic Impedance (ZZT) | 140 Ω at IZT = 5.0 mA - determines voltage deviation under load current changes; lower values improve regulation |
| Reverse Leakage (IR) | 2000 µA max at VR = 1 V - impacts standby power loss in high-impedance bias networks |
| Thermal Resistance | 30°C/W junction-to-TAB1 - quantifies thermal path efficiency; allows PCB copper area design for thermal management |
| ESD Rating | >16 kV per Human Body Model - ensures handling robustness during automated assembly and field operation |
Pinout & Package
Package: Powermite® (DO-216), molded surface-mount package with full metallic bottom (TAB 1) serving as cathode and primary thermal interface. Cathode polarity is unambiguously designated by TAB 1; mounting orientation is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary current return path and thermal conduction surface; must be soldered to PCB copper for rated 3.0 W dissipation |
| Lead 2 | Anode | Signal input terminal; connects to regulated node or protected circuit side in clamp configuration |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow while delivering 3.0 W power handling in footprint smaller than DO-41 |
| Integral heat sink locking tab | TAB 1 provides mechanical anchoring and direct thermal path to PCB, reducing thermal resistance to 30°C/W |
| Full metallic bottom | Eliminates solder flux entrapment risk during reflow, improving long-term reliability and void-free solder joints |
| ESD robustness | >16 kV HBM rating supports handling in standard manufacturing environments without special ESD controls |
Applications
| DC Power Rail Clamping | Voltage Reference for Feedback Loops |
|---|---|
Use Scenario: Protecting 75 V nominal industrial control bus against load dump transients up to 100 V. IC Role / Device Role / Timing Role: Zener clamping element shunting excess energy to ground when bus voltage exceeds 75 V. Use Value: Prevents damage to downstream 75 V-rated ICs using only one discrete component with 3.0 W surge capacity. | Use Scenario: Setting output voltage in a 75 V isolated flyback converter with TL431-based feedback. IC Role / Device Role / Timing Role: Secondary-side Zener reference providing stable 75 V threshold for optocoupler biasing. Use Value: Maintains ±5% output regulation across temperature and line variations without trimming resistors. |
| Overvoltage Protection in Telecom Line Cards | Reference in High-Voltage Sensor Biasing |
Use Scenario: Safeguarding analog front-end inputs on 48–75 V telecom power modules exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting input voltage to 75 V before protection ICs activate. Use Value: Reduces response latency versus TVS diodes alone due to predictable 75 V breakdown and low ZZT. | Use Scenario: Biasing a 75 V avalanche photodiode in fiber-optic receiver modules. IC Role / Device Role / Timing Role: Stable high-voltage bias source ensuring consistent photodiode gain and dark current. Use Value: Enables repeatable sensor calibration with 140 Ω dynamic impedance minimizing voltage droop under bias current ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5359B | Same 75 V nominal Zener voltage, but in DO-15 package; 5.0 W rating; higher thermal resistance (~50°C/W) | Requires larger PCB footprint and additional thermal relief; less suitable for dense SMT layouts | Select when higher power margin is needed and through-hole or larger SMT is acceptable |
| BZX84-C75 | 75 V Zener in SOT-23; 300 mW rating; 10× lower power handling; 150 Ω typical ZZT | Limited to low-power signal-level referencing; cannot replace 1PMT5946AE3/TR7 in power rail clamping | Select only for sub-100 mW bias networks where size is critical and power stress is negligible |
Compared with 1N5359B and BZX84-C75, the 1PMT5946AE3/TR7 uniquely delivers 3.0 W SMT power handling in a DO-216 footprint with integrated thermal tab-enabling compact, high-reliability clamping where both voltage precision and thermal performance matter.
Availability
1PMT5946AE3/TR7 is available at Aetrix Electronics and suitable for DC power rail clamping, voltage reference feedback loops, telecom overvoltage protection, and high-voltage sensor biasing requiring stable component supply and traceable sourcing.
Supply support for 1PMT5946AE3/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 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/TR7?
The 1PMT5946AE3/TR7 has a standard Zener voltage tolerance of ±5% at IZT = 5.0 mA and TC = 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D respectively, but the base part number 1PMT5946AE3/TR7 specifies ±5%. This tolerance directly affects voltage accuracy in reference and clamping applications.
How is thermal management implemented for the 1PMT5946AE3/TR7?
The 1PMT5946AE3/TR7 uses its metallic TAB 1 as both cathode and primary thermal interface. 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 pour on the PCB. This design eliminates need for external heatsinks while sustaining 3.0 W dissipation at TAB temperature ≤60°C.
Is the 1PMT5946AE3/TR7 compatible with standard SMT reflow processes?
Yes, the 1PMT5946AE3/TR7 is qualified for standard lead-free reflow profiles per J-STD-020. Its Powermite® package features a full metallic bottom that prevents solder flux entrapment, and its molded body withstands peak temperatures up to 260°C. The device ships in EIA-481 tape-and-reel format (7″ reel, 3000 pcs), optimized for pick-and-place equipment.
What does the 'E3/TR7' suffix indicate in 1PMT5946AE3/TR7?
The 'E3' denotes compliance with JEDEC moisture sensitivity level 3 (MSL-3), requiring dry-packaging and floor-life management per J-STD-033. 'TR7' specifies packaging in 7-inch tape-and-reel reels containing 3000 units, conforming to EIA-481 standards. These identifiers ensure proper handling and assembly planning for the 1PMT5946AE3/TR7 in high-volume manufacturing.
Can the 1PMT5946AE3/TR7 be used in place of axial-lead Zeners like 1N5359B?
The 1PMT5946AE3/TR7 provides equivalent 75 V Zener functionality but is not a drop-in replacement for 1N5359B due to different package (DO-216 vs. DO-15), polarity marking (TAB 1 cathode vs. band cathode), and thermal path (PCB copper vs. ambient air). Board redesign is required to accommodate the surface-mount footprint and thermal pad layout for the 1PMT5946AE3/TR7.
1PMT5946AE3/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:
- ±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/TR7 FAQ
1.How can I place an order for 1PMT5946AE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5946AE3/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 1PMT5946AE3/TR7 reliable?
The price and inventory of 1PMT5946AE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5946AE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5946AE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5946AE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5946AE3/TR7?
1PMT5946AE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5946AE3/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 1PMT5946AE3/TR7?
For technical support, including 1PMT5946AE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5946AE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5946AE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5946AE3/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 1PMT5946AE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5946AE3/TR7?
All 1PMT5946AE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5946AE3/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 1PMT5946AE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5946AE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5946AE3/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
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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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