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Microchip Technology 1PMT5940CE3/TR7
- Part No.:
- 1PMT5940CE3/TR7
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5940CE3/TR7.pdf
- Description:
- DIODE ZENER 43V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,451
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Product details
Overview
1PMT5940CE3/TR7 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 power supply regulation and protection circuits.
For engineers reviewing the 1PMT5940CE3/TR7 datasheet, 1PMT5940CE3/TR7 pinout, 1PMT5940CE3/TR7 application, or 1PMT5940CE3/TR7 equivalent, key selection criteria include zener voltage accuracy, power handling under thermal constraints, reverse leakage at rated VR, knee current behavior, and compatibility with automated SMT assembly processes.
Technical Context
This device operates as a single-junction silicon Zener diode optimized for stable voltage regulation in compact, thermally constrained layouts. Its DO-216 (Powermite®) package integrates a full metallic bottom and locking tab to enhance thermal conduction and mechanical retention during reflow.
The 1PMT5940CE3/TR7 is characterized at TL = 30°C with VZ = 43 V ±5%, IZT = 8.7 mA, ZZT = 53 Ω, IZK = 0.25 mA, and IR ≤ 1 µA at VR = 32.7 V - all specified per Microsemi's MSC0995 Rev F test methodology.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 43 V ±5% - defines nominal clamping/reference level under 8.7 mA bias; critical for output voltage setpoint accuracy in feedback networks. |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - maximum continuous DC power it can safely dissipate with proper heatsinking via TAB 1. |
| Dynamic Impedance | 53 Ω at IZT = 8.7 mA - indicates voltage regulation stiffness; lower values improve load regulation in shunt references. |
| Junction-to-TAB Thermal Resistance | 30°C/W - quantifies thermal path efficiency from die to mounting tab; enables thermal design margin calculation for PCB copper area. |
| Reverse Leakage | ≤1 µA at VR = 32.7 V - ensures minimal quiescent current in standby or high-impedance sensing nodes. |
| Knee Current | 0.25 mA - minimum current required to enter stable Zener breakdown; determines low-current regulation capability. |
Pinout & Package
Package: DO-216 (Powermite®) - molded surface-mount package with full metallic bottom and integral heat-sink locking tab; cathode designated by TAB 1; weight ≈ 0.016 g; compatible with EIA-481 tape-and-reel (7″/3,000 pcs).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary cathode connection and thermal interface; must be soldered to PCB copper pour for effective heat transfer and electrical return. |
| Lead 2 | Anode | Standard anode terminal; electrically isolated from TAB 1; connects to circuit ground or low-side reference point. |
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 or SOD-123. |
| Full metallic bottom | Eliminates solder flux entrapment risk during assembly, improving long-term reliability and void-free solder joints. |
| Integral heat-sink locking tab | Provides mechanical anchoring during thermal cycling and enhances thermal conduction from junction to PCB. |
| ESD rating >16 kV HBM | Supports robust handling in manufacturing and field environments without additional protection circuitry. |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Zener reference diode providing precise 43 V threshold for TL431-like shunt regulator operation. Use Value: Tight ±5% tolerance and low dynamic impedance ensure <±1% output voltage drift across line/load/temperature variations. | Use Scenario: Provides stable excitation voltage for bridge-based pressure transducers in harsh industrial environments. IC Role / Device Role / Timing Role: Precision voltage reference source with low temperature coefficient and minimal self-heating error. Use Value: 30°C/W thermal resistance and 1 µA max reverse leakage maintain reference stability even with limited PCB copper area. |
| Overvoltage Protection Clamp | Automotive Body Control Module |
Use Scenario: Placed across microcontroller I/O pins or CAN bus lines to suppress transient surges above 32.7 V. IC Role / Device Role / Timing Role: Fast-acting shunt protector absorbing energy during ISO 7637-2 pulse 1/2a events. Use Value: 3.0 W rating and low ZZT allow clamping without thermal runaway during repeated 100 ms transients. | Use Scenario: Regulates auxiliary 43 V rail for solenoid drivers in 24 V vehicle systems with wide input variation. IC Role / Device Role / Timing Role: Primary voltage reference for linear regulators supplying gate drivers or analog sensors. Use Value: -55°C to +150°C operating range and >16 kV HBM ESD rating meet AEC-Q101 requirements for under-hood use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMF43A (ON Semiconductor) | Same 43 V nominal, 1.0 W rating, SOD-123 package, higher ZZT (~100 Ω), no metallic tab. | Limited to lower-power clamping; unsuitable for sustained 3 W dissipation or thermal-critical references. | Select when board space is tighter and power demand is <1 W; avoid where thermal management via tab is required. |
| BZX84-C43 (Diodes Inc.) | 43 V ±5%, 300 mW rating, SOT-23 package, ZZT ~90 Ω, junction-to-ambient RθJA ≈ 300°C/W. | Only viable for signal-level referencing or low-duty-cycle clamping; cannot replace 1PMT5940CE3/TR7 in power regulation. | Choose for cost-sensitive, low-power designs where thermal performance is secondary; not a functional substitute in 3 W applications. |
Compared with SMF43A and BZX84-C43, the 1PMT5940CE3/TR7 uniquely delivers 3.0 W power handling in a surface-mount package with direct thermal path to PCB via TAB 1 - making it irreplaceable in high-stability, high-power Zener reference or clamping roles where thermal resistance and long-term bias stability are design-critical.
Availability
1PMT5940CE3/TR7 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, overvoltage protection circuits, and automotive body control modules requiring stable component supply and traceable sourcing.
Supply support for 1PMT5940CE3/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 to deliver high-power surface-mount voltage regulation in thermally demanding environments - bridging the gap between traditional through-hole Zeners and low-power SMD alternatives.
FAQ
What is the Zener voltage tolerance for 1PMT5940CE3/TR7?
The 1PMT5940CE3/TR7 has a standard Zener voltage tolerance of ±5% at 43 V, measured at IZT = 8.7 mA with TAB 1 held at 30°C. Tighter tolerances (±2% and ±1%) are available with suffixes C and D, but the CE3 designation confirms the ±5% version. This tolerance directly impacts output voltage accuracy in regulated power supplies using 1PMT5940CE3/TR7 as a reference.
How is thermal performance defined for 1PMT5940CE3/TR7?
The 1PMT5940CE3/TR7 specifies a junction-to-TAB thermal resistance of 30°C/W, meaning each watt dissipated raises the junction temperature 30°C above TAB 1 temperature. Since its 3.0 W rating assumes TAB 1 = 60°C, the maximum allowable junction temperature is 150°C - matching its rated storage/junction limit. Effective PCB copper area under TAB 1 is essential to realize this spec in 1PMT5940CE3/TR7 designs.
Does 1PMT5940CE3/TR7 have polarity marking, and how is it identified?
Yes, 1PMT5940CE3/TR7 uses TAB 1 as the cathode terminal, clearly designated in the mechanical drawings and electrical tables. The DO-216 Powermite® package has no band or dot marking; instead, orientation is defined by the larger metallic tab (TAB 1) being the cathode. Correct polarity is critical - reverse connection will forward-bias the diode and cause failure under normal operating conditions of 1PMT5940CE3/TR7.
What is the maximum reverse voltage before significant leakage in 1PMT5940CE3/TR7?
The 1PMT5940CE3/TR7 guarantees reverse leakage ≤1 µA at VR = 32.7 V, which is 76% of its nominal 43 V Zener voltage. Beyond this, leakage increases nonlinearly; at VR = 40 V, leakage may exceed 10 µA. For low-leakage applications like high-impedance sensor biasing, operating below 32.7 V ensures guaranteed 1 µA ceiling - a key design constraint for precision use of 1PMT5940CE3/TR7.
Is 1PMT5940CE3/TR7 compatible with lead-free reflow profiles?
Yes, the 1PMT5940CE3/TR7 Powermite® package is qualified for standard lead-free reflow profiles (JEDEC J-STD-020), with peak temperatures up to 260°C. Its molded construction and metallic bottom withstand thermal stress without delamination or solder wicking. The full metallic bottom also prevents flux entrapment - a known reliability risk in lead-free assembly - making 1PMT5940CE3/TR7 particularly robust for high-yield SMT production.
1PMT5940CE3/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):
- 43 V
- Tolerance:
- ±2%
- 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
1PMT5940CE3/TR7 FAQ
1.How can I place an order for 1PMT5940CE3/TR7 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5940CE3/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 1PMT5940CE3/TR7 reliable?
The price and inventory of 1PMT5940CE3/TR7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5940CE3/TR7 is usually 5 days.
3.What payment methods are accepted for 1PMT5940CE3/TR7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5940CE3/TR7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5940CE3/TR7?
1PMT5940CE3/TR7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5940CE3/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 1PMT5940CE3/TR7?
For technical support, including 1PMT5940CE3/TR7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5940CE3/TR7 requirements.
6.How does Aetrix verify that 1PMT5940CE3/TR7 is sourced from the original manufacturer or authorized distributors?
All 1PMT5940CE3/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 1PMT5940CE3/TR7 meets industry standards.
7.What is the process for return or replacement of 1PMT5940CE3/TR7?
All 1PMT5940CE3/TR7 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5940CE3/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 1PMT5940CE3/TR7 part is unused and in its original packaging.
Return procedure for 1PMT5940CE3/TR7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5940CE3/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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Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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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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