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Microchip Technology 1PMT5940A/TR13
- Part No.:
- 1PMT5940A/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5940A/TR13.pdf
- Description:
- DIODE ZENER 43V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,436
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Product details
Overview
1PMT5940A/TR13 from Microsemi is a 43 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 53 Ω dynamic impedance at 8.7 mA test current and thermal resistance of 30°C/W junction-to-TAB1. It serves as a precision voltage reference or overvoltage clamp in DC power rails and regulator feedback networks.
For engineers reviewing the 1PMT5940A/TR13 datasheet, 1PMT5940A/TR13 pinout, 1PMT5940A/TR13 application, or 1PMT5940A/TR13 equivalent, key selection criteria include zener voltage tolerance, power derating above 60°C, reverse leakage at 32.7 V, knee current behavior at 0.25 mA, and compatibility with EIA-481 tape-and-reel automated placement.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across its specified test current range. Its Powermite® package integrates a full metallic bottom and locking tab to enhance thermal conduction and mechanical stability during reflow or wave soldering.
The device exhibits low reverse leakage (≤1 µA at VR = 32.7 V), 16 kV HBM ESD rating, and stable zener impedance (53 Ω) measured under 60 Hz AC superimposed on 8.7 mA DC bias - confirming suitability for low-noise reference and transient suppression where impedance stability matters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 43 V ±5% at IZT = 8.7 mA, TL = 30°C - defines nominal clamping/reference level |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - sets maximum continuous DC power handling before thermal shutdown |
| Dynamic Impedance (ZZT) | 53 Ω at IZT = 8.7 mA - determines voltage variation under load current changes |
| Knee Current (IZK) | 0.25 mA - minimum current needed to enter stable regulation region |
| Reverse Leakage (IR) | ≤1 µA at VR = 32.7 V - ensures minimal standby current in high-impedance bias networks |
| Thermal Resistance | 30°C/W junction-to-TAB1 - enables accurate PCB copper pour sizing for thermal management |
| ESD Rating | >16 kV per HBM - supports robustness in handling and board-level ESD events |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral heat-sink locking tab; cathode designated by TAB 1; DO-216 outline; weight ≈ 0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat path and electrical cathode connection; must be soldered to thermal pad for rated power dissipation |
| Lead 2 | Anode | Standard anode terminal; mounted opposite TAB 1; no thermal function |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated assembly while delivering 3.0 W power handling in footprint smaller than DO-41 |
| Integral heat-sink locking tab | Improves thermal transfer to PCB copper and prevents component rotation during reflow |
| Full metallic bottom | Eliminates solder flux entrapment risk and enhances thermal conduction vs. plastic-bottom SMD packages |
| 16 kV HBM ESD rating | Reduces need for external ESD protection in low-voltage interface circuits |
| ±5% VZ tolerance (standard) | Supports cost-sensitive applications where tighter tolerances (e.g., 2% suffix C) are not required |
Applications
| DC Power Rail Clamping | Feedback Reference in SMPS |
|---|---|
Use Scenario: Protecting 3.3 V or 5 V logic rails from transient overvoltage spikes in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Zener clamping element placed between rail and ground, conducting only when voltage exceeds 43 V. Use Value: Limits peak rail voltage to safe levels without requiring active circuitry or large capacitors. | Use Scenario: Providing stable reference voltage to optocoupler input in isolated flyback converter feedback loop. IC Role / Device Role / Timing Role: Precision voltage reference setting error amplifier trip point via resistor divider. Use Value: Maintains tight output regulation despite input line variations due to low ZZT and stable VZ. |
| Low-Power Sensor Biasing | Overvoltage Protection in Telecom Line Cards |
Use Scenario: Biasing analog sensor outputs (e.g., RTD bridges) requiring stable excitation voltage in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Shunt reference providing regulated 43 V bias to high-impedance sensor interface. Use Value: Delivers stable reference with ≤1 µA leakage, minimizing impact on sensor signal integrity. | Use Scenario: Front-end surge suppression on -48 V telecom power feeds exposed to lightning-induced transients. IC Role / Device Role / Timing Role: Primary shunt clamp absorbing energy during fast-rising surges up to 3.0 W average power. Use Value: Leverages 30°C/W thermal resistance and metallic bottom to sustain repeated 10/1000 µs surges without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5940B | Same 43 V VZ and ±5% tolerance, but in DO-41 through-hole package; higher thermal resistance (~65°C/W) | Requires manual or wave-solder assembly; unsuitable for high-density SMT layouts | Select only if legacy through-hole design or prototyping without SMT capability |
| BZX84-C43 | 43 V ±5%, SOT-23 package; rated for 300 mW only; 100 Ω ZZT at 5 mA | Limited to low-power biasing; cannot replace 1PMT5940A/TR13 in 3 W clamping roles | Use only in space-constrained, sub-500 mW reference applications where thermal budget permits |
Compared with 1N5940B and BZX84-C43, the 1PMT5940A/TR13 uniquely combines 3.0 W SMT power handling, 53 Ω low-impedance regulation, and integrated thermal tab - making it irreplaceable in high-reliability, high-power density Zener applications requiring both performance and manufacturability.
Availability
1PMT5940A/TR13 is available at Aetrix Electronics and suitable for DC power rail clamping, SMPS feedback referencing, low-power sensor biasing, and telecom overvoltage protection requiring stable component supply across industrial, automotive, and communications end markets.
Supply support for 1PMT5940A/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 manufacturer specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial systems.
The Powermite® Zener series, including 1PMT5940A/TR13, was designed for high-power-density surface-mount voltage regulation and transient suppression in mission-critical power systems where thermal performance and assembly reliability are essential.
FAQ
What is the zener voltage tolerance for 1PMT5940A/TR13?
The 1PMT5940A/TR13 has a standard zener voltage tolerance of ±5% at 43 V, measured at 8.7 mA test current and TAB 1 temperature of 30°C. Tighter tolerances (2% and 1%) are available as suffix C and D variants, but the base 1PMT5940A/TR13 uses ±5%.
Can 1PMT5940A/TR13 be used in place of a through-hole Zener like 1N5940B?
No - while 1PMT5940A/TR13 and 1N5940B share identical 43 V zener voltage and tolerance, they differ fundamentally in package, thermal performance, and mounting method. The 1PMT5940A/TR13 uses Powermite® SMT packaging with 30°C/W thermal resistance and requires reflow soldering; 1N5940B uses DO-41 through-hole with ~65°C/W. Direct substitution would require PCB redesign.
What is the maximum reverse leakage current for 1PMT5940A/TR13?
The maximum reverse leakage current for 1PMT5940A/TR13 is 1 µA at a reverse voltage of 32.7 V, as specified in the Microsemi MSC0995 datasheet. This low leakage supports use in high-impedance bias networks where current draw must be minimized.
How is thermal management handled for 1PMT5940A/TR13 in high-power operation?
Thermal management for 1PMT5940A/TR13 relies on soldering TAB 1 (cathode) to a thermally robust PCB copper pour. With a junction-to-TAB1 thermal resistance of 30°C/W, maintaining TAB 1 at ≤60°C ensures full 3.0 W power dissipation. Exceeding this temperature requires linear derating per the datasheet curves.
Is 1PMT5940A/TR13 compatible with automated SMT assembly processes?
Yes - the 1PMT5940A/TR13 is supplied in EIA-481 compliant tape-and-reel format (13-inch reel, 12,000 pieces), and its Powermite® package features a locking tab and full metallic bottom specifically engineered for reliable pick-and-place, reflow, and wave soldering without rotation or flux entrapment.
1PMT5940A/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):
- 43 V
- Tolerance:
- ±10%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 53 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 32.7 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
1PMT5940A/TR13 FAQ
1.How can I place an order for 1PMT5940A/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5940A/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 1PMT5940A/TR13 reliable?
The price and inventory of 1PMT5940A/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5940A/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5940A/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5940A/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5940A/TR13?
1PMT5940A/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5940A/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 1PMT5940A/TR13?
For technical support, including 1PMT5940A/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5940A/TR13 requirements.
6.How does Aetrix verify that 1PMT5940A/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5940A/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 1PMT5940A/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5940A/TR13?
All 1PMT5940A/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5940A/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 1PMT5940A/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5940A/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5940A/TR13 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
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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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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