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Microchip Technology 1PMT5942AE3/TR13
- Part No.:
- 1PMT5942AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5942AE3/TR13.pdf
- Description:
- DIODE ZENER 51V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,853
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Product details
Overview
1PMT5942AE3/TR13 from Microsemi is a 51 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 70 Ω dynamic impedance at 7.3 mA test current and 1100 µA max reverse leakage at 38.8 V. It serves as a precision voltage reference or overvoltage clamp in power supply regulation circuits.
For engineers reviewing the 1PMT5942AE3/TR13 datasheet, 1PMT5942AE3/TR13 pinout, 1PMT5942AE3/TR13 application, or 1PMT5942AE3/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, and compatibility with automated SMT assembly.
Technical Context
This device operates as a two-terminal voltage-regulating diode with sharp reverse-breakdown characteristics. Its Powermite® package integrates a full metallic bottom and locking tab for mechanical stability and thermal conduction to PCB copper, enabling reliable operation up to +150°C junction temperature.
The 1PMT5942AE3/TR13 exhibits 70 Ω dynamic impedance at IZT = 7.3 mA and maintains ≤1100 µA reverse leakage at VR = 38.8 V, supporting stable clamping in transient suppression and feedback-sensing applications where low noise and tight voltage control are required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 51 V ±5% at IZT = 7.3 mA - defines nominal regulation point with predictable deviation under production tolerance |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-power voltage clamping without external heatsink in compact layouts |
| Dynamic Impedance ZZT | 70 Ω at 7.3 mA - ensures minimal output voltage variation during load current transients |
| Reverse Leakage IR | ≤1100 µA at 38.8 V - guarantees low standby power loss in always-on protection circuits |
| Thermal Resistance | 30°C/W junction-to-TAB - allows accurate thermal design when mounting on copper pour or thermal pad |
| ESD Rating | >16 kV per HBM - provides robust handling immunity during board assembly and field operation |
Pinout & Package
Package: Powermite® surface-mount molded package with full metallic bottom and integral heat sink locking tab; cathode designated by TAB 1; compatible with EIA-481 tape-and-reel (13-inch reel, 12,000 pcs).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat path and electrical connection point - must be soldered to thermal pad for rated 3.0 W dissipation |
| Lead 2 | Anode | Standard anode terminal - routed to ground or return path in shunt regulator configuration |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount Powermite® package | Enables automated placement and reflow while delivering 3.0 W power handling comparable to larger through-hole Zeners |
| Integral heat sink locking tab | Provides mechanical anchoring and direct thermal conduction from junction to PCB copper, reducing thermal resistance to 30°C/W |
| Full metallic bottom | Eliminates solder flux entrapment during reflow, improving long-term reliability and interfacial thermal contact |
| ESD rating >16 kV HBM | Reduces risk of electrostatic damage during handling, testing, and system integration without additional protection circuitry |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Used in optocoupler-coupled feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 51 V threshold to error amplifier input. Use Value: Tight ±5% VZ tolerance and low 70 Ω ZZT ensure stable regulation across line/load variations without compensation overhead. | Use Scenario: Placed across sensitive IC inputs to clamp transient surges exceeding 38.8 V. IC Role / Device Role / Timing Role: Passive overvoltage clamp diverting surge current to ground before downstream damage occurs. Use Value: 3.0 W power rating and 30°C/W thermal resistance allow safe dissipation of short-duration transients without thermal runaway. |
| Industrial Sensor Signal Conditioning | Programmable Logic Controller Input Protection |
Use Scenario: Biasing and limiting analog sensor signal paths operating near 51 V supply rails. IC Role / Device Role / Timing Role: Precision voltage limiter establishing upper rail for op-amp input stages. Use Value: Low 1100 µA reverse leakage at 38.8 V prevents loading of high-impedance sensor outputs during normal operation. | Use Scenario: Protecting digital input channels of PLC modules exposed to 24–48 V field wiring. IC Role / Device Role / Timing Role: Robust front-end clamp absorbing induced surges from inductive loads or lightning coupling. Use Value: >16 kV HBM ESD rating and metallic-bottom construction ensure survivability in harsh industrial environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5942B | Same 51 V zener voltage and ±5% tolerance, but in DO-41 through-hole package; no metallic bottom or locking tab; thermal resistance ~65°C/W | Requires manual or wave soldering; unsuitable for high-density SMT layouts or automated insertion | Select only if legacy through-hole assembly is mandated and thermal derating can accommodate higher RθJA |
| BZX84-C51 | 51 V ±5% in SOT-23; rated 300 mW only; dynamic impedance ~100 Ω at 5 mA; no ESD rating specified | Limited to low-power signal-level clamping; cannot replace 1PMT5942AE3/TR13 in 3 W power applications | Use only for space-constrained, low-energy transient suppression where 3.0 W capability is unnecessary |
Compared with 1N5942B and BZX84-C51, the 1PMT5942AE3/TR13 uniquely combines SMT compatibility, 3.0 W power handling, 30°C/W thermal resistance, and >16 kV ESD rating-making it the only option for high-reliability, high-power, automated-production Zener applications requiring both precision and ruggedness.
Availability
1PMT5942AE3/TR13 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial overvoltage protection systems, and programmable logic controller input conditioning requiring stable component supply and consistent parametric performance across production lots.
Supply support for 1PMT5942AE3/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 to deliver high-power surface-mount voltage regulation with enhanced thermal performance and assembly robustness for mission-critical power management systems.
FAQ
What is the zener voltage tolerance for 1PMT5942AE3/TR13?
The 1PMT5942AE3/TR13 has a standard zener voltage tolerance of ±5% at 51 V, measured at IZT = 7.3 mA with TAB 1 held at 30°C. Tighter tolerances (±2%, ±1%) are available with suffixes C and D, but the E3 suffix indicates the standard ±5% grade. This tolerance directly impacts regulation accuracy in feedback and clamping circuits.
How is thermal performance defined for 1PMT5942AE3/TR13?
The 1PMT5942AE3/TR13 specifies a thermal resistance of 30°C/W junction-to-TAB, meaning each watt dissipated raises the junction temperature 30°C above the TAB temperature. To achieve its full 3.0 W rating, TAB 1 must be maintained at ≤60°C - requiring adequate PCB copper area or thermal vias beneath the metallic bottom.
Is 1PMT5942AE3/TR13 compatible with lead-free reflow processes?
Yes, the 1PMT5942AE3/TR13 is qualified for standard lead-free reflow profiles, including peak temperatures up to 260°C. Its Powermite® package uses thermally stable molding compound and metallization, and the full metallic bottom ensures uniform heat distribution during soldering - critical for void-free joints in high-power SMT applications.
What does the 'TR13' suffix indicate in 1PMT5942AE3/TR13?
The 'TR13' suffix denotes packaging: tape-and-reel on a 13-inch diameter reel containing 12,000 units, compliant with EIA-481 standards. This format supports high-speed pick-and-place equipment and ensures consistent feeding and tension control during automated assembly - essential for maintaining placement accuracy and minimizing feed errors.
Can 1PMT5942AE3/TR13 be used in place of a 1N5942B?
No - although both share 51 V zener voltage and ±5% tolerance, the 1PMT5942AE3/TR13 is a surface-mount Powermite® device with 3.0 W rating and 30°C/W thermal resistance, whereas the 1N5942B is a through-hole DO-41 part rated for 5 W but with much higher thermal resistance (~65°C/W) and incompatible footprint. Direct substitution requires PCB redesign.
1PMT5942AE3/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):
- 51 V
- Tolerance:
- ±10%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 38.8 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
1PMT5942AE3/TR13 FAQ
1.How can I place an order for 1PMT5942AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5942AE3/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 1PMT5942AE3/TR13 reliable?
The price and inventory of 1PMT5942AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5942AE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5942AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5942AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5942AE3/TR13?
1PMT5942AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5942AE3/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 1PMT5942AE3/TR13?
For technical support, including 1PMT5942AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5942AE3/TR13 requirements.
6.How does Aetrix verify that 1PMT5942AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5942AE3/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 1PMT5942AE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5942AE3/TR13?
All 1PMT5942AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5942AE3/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 1PMT5942AE3/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5942AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5942AE3/TR13 Tags
-
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
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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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