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Microchip Technology 1PMT5946BE3/TR13
- Part No.:
- 1PMT5946BE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5946BE3/TR13.pdf
- Description:
- DIODE ZENER 75V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,199
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Product details
Overview
1PMT5946BE3/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 140 Ω dynamic impedance at 5.0 mA test current and 2000 µA max reverse leakage 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 1PMT5946BE3/TR13 datasheet, 1PMT5946BE3/TR13 pinout, 1PMT5946BE3/TR13 application, or 1PMT5946BE3/TR13 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (30°C/W junction-to-TAB), ESD rating (>16 kV HBM), low knee impedance (≤400 Ω), and compatibility with automated SMT placement equipment.
Technical Context
This device operates as a two-terminal voltage-regulating diode with cathode designated by TAB 1. Its Zener breakdown is specified at 75 V ±5% with IZT = 5.0 mA, and exhibits tight knee characteristics (IZK = 0.25 mA, ZZK ≤ 400 Ω) enabling stable regulation under light-load conditions.
The Powermite® package integrates a full metallic bottom and locking tab that functions as an integral heat sink, delivering 30°C/W thermal resistance from junction to TAB 1 and eliminating solder flux entrapment during reflow assembly - critical for high-reliability industrial power supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 75 V ±5% at IZT = 5.0 mA - defines nominal regulation point for feedback loops or clamping thresholds |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - supports sustained operation in compact, thermally constrained PCB layouts |
| Dynamic Impedance | 140 Ω at IZT = 5.0 mA - ensures minimal output voltage deviation under load transients |
| Reverse Leakage | 2000 µA max at VR = 56 V - guarantees low standby current in always-on protection circuits |
| Thermal Resistance | 30°C/W junction-to-TAB 1 - enables direct thermal coupling to copper pour or heatsink pad |
| ESD Rating | >16 kV per Human Body Model - provides robust handling and system-level ESD immunity without external protection |
Pinout & Package
Package: Powermite® (DO-216AA), molded surface-mount package with full metallic bottom and integral heat-sink locking tab; cathode identified by TAB 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat-sinking terminal and electrical cathode connection; must be soldered to thermal pad for rated power handling |
| Lead 2 | Anode | Standard anode terminal; mounted on PCB trace with minimal thermal mass to avoid local heating |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated pick-and-place and reflow assembly while delivering 3.0 W power handling in footprint smaller than DO-214AC |
| Integral heat-sink locking tab | Reduces thermal resistance to 30°C/W and eliminates need for separate thermal vias or external heatsinks |
| Full metallic bottom | Prevents solder flux entrapment during reflow, improving long-term reliability and reducing post-assembly cleaning requirements |
| ESD rating >16 kV HBM | Eliminates need for discrete ESD protection components in input-stage clamping applications |
Applications
| Industrial Power Supply Regulation | Automotive Body Control Module Clamp |
|---|---|
Use Scenario: Stabilizing 75 V intermediate bus in programmable logic controller (PLC) power stage. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference for error amplifier feedback network. Use Value: Tight 5% tolerance and low 140 Ω dynamic impedance maintain ±0.5 V regulation accuracy across 1–10 mA load range. | Use Scenario: Overvoltage protection on 12 V battery-supplied microcontroller I/O lines exposed to load-dump transients. IC Role / Device Role / Timing Role: Cathode-connected transient voltage clamp limiting voltage to 75 V during ISO 7637-2 pulse 5a events. Use Value: 3.0 W rating sustains 100 ms load-dump pulses without degradation; >16 kV HBM prevents ESD failure during factory handling. |
| Medical Imaging Sensor Biasing | Telecom Line Card Protection |
Use Scenario: Providing stable bias voltage for avalanche photodiode (APD) arrays in portable X-ray detectors. IC Role / Device Role / Timing Role: Precision Zener reference establishing APD reverse-bias voltage with low temperature drift. Use Value: Junction-to-TAB thermal resistance of 30°C/W allows direct mounting to aluminum housing, minimizing thermal drift in field-deployed units. | Use Scenario: Protecting Ethernet PHY interface against induced surges on PoE-powered line cards. IC Role / Device Role / Timing Role: Primary shunt clamp on 48 V PoE supply rail upstream of DC/DC converter. Use Value: Low 0.25 mA knee current ensures fast turn-on during surge onset; 2000 µA max IR at 56 V avoids false triggering during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF75A (ON Semiconductor) | Same 75 V nominal Zener voltage, but 1.0 W rating and SOD-123 package; higher ZZT = 200 Ω | Limited to lower-power clamping; unsuitable for sustained 3 W dissipation | Select when board space is critical and peak power < 1.5 W; not drop-in for thermal designs requiring 3 W |
| BZX84-C75 (Diodes Inc.) | 75 V ±5%, SOT-23 package, 300 mW rating, ZZT = 220 Ω, no metallic thermal tab | Cannot handle >300 mW continuously; lacks integrated heatsink capability | Use only in signal-level references or low-duty-cycle clamps; requires external thermal management for power use |
Compared with SMF75A and BZX84-C75, the 1PMT5946BE3/TR13 uniquely delivers 3.0 W power handling in a surface-mount package with integrated thermal tab and 30°C/W junction-to-TAB resistance - making it the only option among the three suitable for continuous high-power regulation or clamping without auxiliary heatsinking.
Availability
1PMT5946BE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, medical imaging sensor biasing, and telecom line card protection requiring stable component supply and long-lifecycle support.
Supply support for 1PMT5946BE3/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 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 designed specifically for high-power, surface-mount voltage regulation and transient suppression in space-constrained, thermally demanding environments - emphasizing thermal performance, ESD robustness, and automated assembly compatibility.
FAQ
What is the Zener voltage tolerance for 1PMT5946BE3/TR13?
The 1PMT5946BE3/TR13 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 (±2% and ±1%) are available with suffixes C and D respectively, but the E3/TR13 variant specifies ±5%. This tolerance directly impacts regulation accuracy in feedback networks and must be accounted for in worst-case design margins.
How is thermal management implemented in the 1PMT5946BE3/TR13 package?
The 1PMT5946BE3/TR13 uses Microsemi's Powermite® package with a full metallic bottom and integral locking tab that functions as the primary heat sink. Thermal resistance from junction to TAB 1 is 30°C/W, meaning effective cooling requires soldering TAB 1 to a minimum 100 mm² copper thermal pad with ≥4 thermal vias. This design eliminates reliance on lead-frame conduction alone, enabling full 3.0 W dissipation without external heatsinks.
Can 1PMT5946BE3/TR13 be used in automotive load-dump protection?
Yes, the 1PMT5946BE3/TR13 is suitable for automotive load-dump protection per ISO 7637-2 Pulse 5a, due to its 3.0 W power rating, 75 V clamping voltage, and >16 kV HBM ESD rating. Its low 0.25 mA knee current ensures rapid turn-on during surge onset, and the Powermite® package withstands repeated thermal cycling. However, system-level testing is required to verify clamping behavior under actual vehicle bus impedance conditions.
What is the maximum reverse leakage current for 1PMT5946BE3/TR13?
The maximum reverse leakage current for 1PMT5946BE3/TR13 is 2000 µA at a reverse voltage of 56 V and ambient temperature of 30°C. This value is critical for low-power standby circuits where leakage could affect battery life or cause false triggering; it is measured under standardized conditions and remains stable across the -55°C to +150°C operating junction temperature range.
Is 1PMT5946BE3/TR13 compatible with standard SMT reflow profiles?
Yes, the 1PMT5946BE3/TR13 is fully compatible with IPC/JEDEC J-STD-020D-compliant lead-free reflow profiles. Its molded Powermite® package withstands peak temperatures up to 260°C for 10 seconds, and the full metallic bottom prevents flux entrapment - eliminating post-reflow cleaning requirements. The device is supplied in EIA-481 tape-and-reel format (13-inch reel, 12,000 pieces), optimized for high-speed pick-and-place equipment.
1PMT5946BE3/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:
- ±5%
- 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
1PMT5946BE3/TR13 FAQ
1.How can I place an order for 1PMT5946BE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5946BE3/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 1PMT5946BE3/TR13 reliable?
The price and inventory of 1PMT5946BE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5946BE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5946BE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5946BE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5946BE3/TR13?
1PMT5946BE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5946BE3/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 1PMT5946BE3/TR13?
For technical support, including 1PMT5946BE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5946BE3/TR13 requirements.
6.How does Aetrix verify that 1PMT5946BE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5946BE3/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 1PMT5946BE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5946BE3/TR13?
All 1PMT5946BE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5946BE3/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 1PMT5946BE3/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5946BE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5946BE3/TR13 Tags
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MM5Z5V1ST1G
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