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Microchip Technology 1PMT5941/TR7
- Part No.:
- 1PMT5941/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5941/TR7.pdf
- Description:
- DIODE ZENER 47V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,073
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Product details
Overview
1PMT5941B from Microsemi is a 47 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 67 Ω dynamic impedance at 8.0 mA test current and 1000 µA max reverse leakage at 35.8 V. It serves as a precision voltage reference or overvoltage clamp in DC power rails of industrial control modules.
For engineers reviewing the 1PMT5941B datasheet, 1PMT5941B pinout, 1PMT5941B application, or 1PMT5941B equivalent, key selection criteria include its 47 V nominal Zener voltage, 3.0 W thermal capability via metallic tab, DO-216 mechanical outline, and ESD rating >16 kV HBM - critical for ruggedized power supply and protection designs.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across its specified test current range (IZT = 8.0 mA). Its thermal resistance of 30°C/W (junction-to-TAB1) enables reliable power handling when mounted on thermally conductive PCB pads.
The device features a full metallic bottom and integral locking tab for mechanical stability and enhanced heat transfer during reflow or wave soldering. Cathode is unambiguously designated by TAB 1 per mechanical drawings and electrical test setup.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V ±5% at IZT = 8.0 mA, TL = 30°C - defines stable clamping/reference point in regulated supplies |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - supports sustained operation in compact industrial power stages |
| Dynamic Impedance (ZZT) | 67 Ω at IZT = 8.0 mA - determines output voltage variation under load transients |
| Reverse Leakage (IR) | ≤1000 µA at VR = 35.8 V - ensures low quiescent current in standby protection circuits |
| Thermal Resistance | 30°C/W junction-to-TAB1 - requires direct thermal pad connection to dissipate 3 W safely |
| ESD Rating | >16 kV HBM - provides robustness against handling and system-level electrostatic events |
| Knee Current (IZK) | 0.25 mA - minimum current needed to enter useful regulation region near VZ |
Pinout & Package
Package: Powermite® (DO-216), molded surface-mount package with full metallic bottom and cathode designated by TAB 1. Mounting orientation is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat sink interface and electrical cathode connection; must be soldered to thermal pad |
| Lead 2 | Anode | Standard anode terminal; electrically isolated from TAB 1 in normal operation |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and high-density PCB layouts without through-hole drilling |
| Integral heat sink locking tab | TAB 1 acts as both cathode and primary thermal path, reducing junction temperature rise by ~30°C/W |
| Full metallic bottom | Eliminates solder flux entrapment risk during reflow, improving long-term solder joint reliability |
| ESD rating >16 kV HBM | Reduces need for external ESD protection in board-level transient suppression circuits |
| Tight voltage tolerance option | ±2% (suffix C) or ±1% (suffix D) available - supports high-accuracy reference applications |
Applications
| Industrial Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing 48 V DC bus in programmable logic controller (PLC) backplane power distribution. IC Role / Device Role / Timing Role: Zener reference element providing precise 47 V clamp to protect downstream regulators and ADC references. Use Value: Maintains ±5% regulation over temperature and load, enabling consistent 12-bit ADC accuracy without trimming. | Use Scenario: Safeguarding microcontroller I/O pins against accidental 48 V rail coupling in factory automation sensors. IC Role / Device Role / Timing Role: Fast-acting shunt protector diverting surge energy to ground before IC damage occurs. Use Value: 3.0 W power rating and 30°C/W thermal resistance allow single-device clamping of 100 ms overvoltage events. |
| DC-DC Converter Feedback Network | Test Equipment Reference Source |
Use Scenario: Setting output voltage of isolated 48 V → 5 V flyback converter in medical diagnostic equipment. IC Role / Device Role / Timing Role: Precision voltage reference in optocoupler feedback loop to maintain tight output regulation. Use Value: Low 67 Ω dynamic impedance minimizes output voltage drift under dynamic load changes up to 2 A. | Use Scenario: Providing stable 47 V calibration reference in handheld multimeter front-end circuitry. IC Role / Device Role / Timing Role: Low-drift Zener source for analog-to-digital conversion reference scaling. Use Value: ≤1000 µA reverse leakage at 35.8 V ensures minimal loading error on high-impedance reference dividers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF47A (ON Semiconductor) | Same 47 V nominal, SOD-123 package, 1.0 W rating, 100 Ω Zzt | Limited to lower-power applications due to 1.0 W dissipation vs. 3.0 W | Select when board space is constrained and thermal budget allows ≤1 W continuous dissipation |
| BZX84-C47 (Diodes Inc.) | 47 V ±5%, SOT-23, 300 mW rating, 100 Ω Zzt, no metallic tab | Not suitable for high-power clamping; lacks thermal interface for >0.5 W operation | Choose only for signal-level referencing where power handling is not required |
Compared with SMF47A and BZX84-C47, the 1PMT5941B delivers triple the power dissipation and superior thermal management via its metallic TAB 1, making it uniquely suited for industrial-grade 47 V clamping where sustained 3 W operation and ESD resilience are mandatory.
Availability
1PMT5941B is available at Aetrix Electronics and suitable for industrial power supply regulation, overvoltage protection circuits, and DC-DC converter feedback networks requiring stable component supply and long-lifecycle support.
Supply support for 1PMT5941B 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, and industrial markets.
The Powermite® Zener diode family was designed specifically for surface-mount power regulation and transient protection in harsh-environment electronics where thermal performance and mechanical robustness are critical.
FAQ
What is the maximum power dissipation rating for the 1PMT5941B?
The 1PMT5941B is rated for 3.0 W DC power dissipation when TAB 1 is maintained at 60°C. This rating assumes proper thermal design - including a copper thermal pad connected to TAB 1 - and accounts for voltage derating at higher currents and temperatures per Micro Note 202. Exceeding this limit risks permanent degradation of the 1PMT5941B's Zener characteristics.
How is the cathode identified on the 1PMT5941B package?
The cathode of the 1PMT5941B is designated by TAB 1, as confirmed in the mechanical specifications and circuit diagram of MSC0995.PDF. TAB 1 is the large metallic surface on the bottom of the Powermite® package and must be soldered to a thermal pad to serve both electrical and thermal functions. Lead 2 is the anode.
Does the 1PMT5941B have an ESD rating, and if so, what is it?
Yes, the 1PMT5941B has an ESD rating of >16 kV per the Human Body Model (HBM), as stated in the FEATURES section of MSC0995.PDF. This high level of ESD immunity reduces susceptibility to damage during handling and assembly, and lessens the need for additional board-level ESD protection when using the 1PMT5941B in sensitive input or output clamping roles.
What is the dynamic impedance of the 1PMT5941B, and why does it matter?
The 1PMT5941B has a dynamic impedance (ZZT) of 67 Ω measured at IZT = 8.0 mA. This value quantifies how much the Zener voltage changes under small-signal AC current variations - lower ZZT means tighter voltage regulation during load transients. In practice, this enables stable reference performance in feedback networks and low-drift clamping in 47 V power systems using the 1PMT5941B.
Can the 1PMT5941B be used in place of through-hole Zener diodes like the 1N5275B?
The 1PMT5941B is not a direct replacement for the 1N5275B (47 V, 0.5 W, DO-35) due to fundamental differences in package, power rating, and thermal path. While both provide 47 V regulation, the 1PMT5941B delivers 3.0 W dissipation via its metallic TAB 1, whereas the 1N5275B is limited to 0.5 W. Substitution requires PCB layout revision to accommodate the DO-216 footprint and thermal pad - the 1PMT5941B is not a drop-in upgrade.
1PMT5941/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):
- 47 V
- Tolerance:
- ±20%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 67 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 35.8 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
1PMT5941/TR7 FAQ
1.How can I place an order for 1PMT5941/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5941/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 1PMT5941/TR7 reliable?
The price and inventory of 1PMT5941/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5941/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5941/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5941/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5941/TR7?
1PMT5941/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5941/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 1PMT5941/TR7?
For technical support, including 1PMT5941/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5941/TR7 requirements.
6.How does Aetrix verify that 1PMT5941/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5941/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 1PMT5941/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5941/TR7?
All 1PMT5941/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5941/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 1PMT5941/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5941/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5941/TR7 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
SMAJ4744A-TP
Micro Commercial Co
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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