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Microchip Technology 1PMT5942A/TR13
- Part No.:
- 1PMT5942A/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT5942A/TR13.pdf
- Description:
- DIODE ZENER 51V 3W DO216AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,853
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Product details
Overview
1PMT5942A/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 DC power rails and regulator feedback paths.
For engineers reviewing the 1PMT5942A/TR13 datasheet, 1PMT5942A/TR13 pinout, 1PMT5942A/TR13 application, or 1PMT5942A/TR13 equivalent, key selection criteria include its 51 V nominal Zener voltage, 3.0 W thermal capability via metallic tab, DO-216 mechanical outline, ESD rating >16 kV HBM, and compatibility with automated SMT insertion equipment.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across its specified test current range (IZT = 7.3 mA). Its Powermite® package integrates a full metallic bottom and locking tab to ensure low thermal resistance (30°C/W junction-to-TAB1) and reliable solder joint formation without flux entrapment.
The device exhibits low knee impedance (ZZK = 0.25 Ω) and stable reverse leakage (IR ≤ 1100 µA at VR = 38.8 V), enabling consistent clamping performance in transient suppression and reference circuits where thermal stability and low noise are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 51 V ±5% at IZT = 7.3 mA - defines precise DC voltage reference point for regulation or clamping |
| Power Dissipation | 3.0 W at TAB 1 = 60°C - enables high-energy transient absorption without derating in compact layouts |
| Dynamic Impedance (ZZT) | 70 Ω at IZT - ensures minimal voltage shift under load current variation in feedback networks |
| Reverse Leakage (IR) | ≤1100 µA at VR = 38.8 V - guarantees low standby power loss in always-on protection circuits |
| Thermal Resistance | 30°C/W junction-to-TAB1 - allows direct thermal coupling to PCB copper pour or heatsink for sustained 3 W operation |
| ESD Rating | >16 kV HBM - provides robust handling margin during board assembly and field operation |
| Package Outline | DO-216 (Powermite®) - surface-mount footprint compatible with standard 7-inch tape-and-reel (EIA-481) automation |
Pinout & Package
Powermite® package features a molded body with full metallic bottom and integral heat-sink locking tab. Cathode is designated by TAB 1; anode is the opposite terminal. Mounting orientation is unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TAB 1 | Cathode | Primary heat path and voltage reference node; must be connected to ground or low-impedance return for thermal and electrical stability |
| Opposite Terminal | Anode | Current entry point during forward bias; reverse-biased connection forms Zener clamping path |
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 |
| Full metallic bottom | Eliminates solder flux entrapment risk during reflow, improving long-term solder joint reliability and yield |
| Integral heat-sink locking tab | Provides mechanical anchoring and low-resistance thermal path from junction to PCB copper or heatsink |
| ESD robustness | >16 kV per Human Body Model ensures survivability during handling, assembly, and end-use environments |
| Tight voltage tolerance option | Available in ±2% (suffix C) and ±1% (suffix D) for high-precision reference applications beyond standard ±5% |
Applications
| DC Power Rail Clamping | Feedback Reference in SMPS |
|---|---|
Use Scenario: Protecting 48 V telecom line cards from surge-induced overvoltage events. IC Role / Device Role / Timing Role: Voltage-clamping element shunting excess energy to ground during transients. Use Value: 51 V Zener voltage aligns with 48 V system margin; 3.0 W rating absorbs IEC 61000-4-5 Level 4 surges without degradation. | Use Scenario: Providing stable reference voltage to error amplifier in isolated flyback converter. IC Role / Device Role / Timing Role: Precision voltage reference setting output regulation threshold. Use Value: 70 Ω dynamic impedance minimizes output voltage drift under load step changes; ±5% tolerance meets Class II SMPS accuracy requirements. |
| Industrial Sensor Signal Conditioning | Automotive ECU Voltage Monitoring |
Use Scenario: Protecting analog front-end inputs of 24 V industrial pressure sensors from ESD and cable discharge. IC Role / Device Role / Timing Role: Low-leakage transient suppressor on signal lines. Use Value: 1100 µA max IR at 38.8 V prevents signal offset errors; >16 kV HBM withstands factory ESD events without parameter shift. | Use Scenario: Monitoring battery voltage in 12 V automotive control units with brown-out detection. IC Role / Device Role / Timing Role: Stable voltage reference for comparator threshold generation. Use Value: -55°C to +150°C operating range supports under-hood deployment; metallic tab ensures thermal tracking with engine temperature fluctuations. |
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/3.0 W specification but in DO-41 through-hole package; no metallic tab or automated SMT compatibility | Suitable only for prototyping or legacy through-hole designs; lacks thermal performance and assembly scalability of Powermite® | Select 1PMT5942A/TR13 when SMT volume production, thermal management, or ESD robustness are required |
| BZX84-C51 | 51 V, ±5%, 300 mW SOT-23 package; 10× lower power rating and higher dynamic impedance (600 Ω) | Limited to low-energy signal-line protection or low-current references; cannot replace 1PMT5942A/TR13 in power rail clamping | Choose 1PMT5942A/TR13 where 3.0 W clamping energy, low ZZT, or thermal reliability are design-critical |
Compared with 1N5942B and BZX84-C51, the 1PMT5942A/TR13 uniquely combines high-power SMT packaging, low thermal resistance, and industrial-grade ESD immunity-making it the only option capable of sustaining 3.0 W dissipation in automated production environments without derating.
Availability
1PMT5942A/TR13 is available at Aetrix Electronics and suitable for DC power rail clamping, SMPS feedback referencing, industrial sensor protection, and automotive voltage monitoring requiring stable component supply across extended temperature ranges and high-reliability manufacturing.
Supply support for 1PMT5942A/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 and mixed-signal components for aerospace, defense, industrial, and communications markets.
The Powermite® Zener diode family-including 1PMT5942A/TR13-is engineered for high-power surface-mount voltage regulation and transient suppression in space-constrained, thermally demanding applications where traditional through-hole devices fall short.
FAQ
What is the Zener voltage tolerance for 1PMT5942A/TR13?
The 1PMT5942A/TR13 has a standard Zener voltage tolerance of ±5% at 51 V, measured at 7.3 mA test current with TAB 1 held at 30°C. Tighter tolerances of ±2% (suffix C) and ±1% (suffix D) are available upon request, but the base 1PMT5942A/TR13 part uses the ±5% grade per Microsemi's MSC0995 specification sheet.
How is thermal management achieved in the 1PMT5942A/TR13 Powermite® package?
The 1PMT5942A/TR13 achieves thermal management via its full metallic bottom and integral locking tab, which serve as a direct thermal conduction path from the silicon junction to the PCB. With a specified thermal resistance of 30°C/W junction-to-TAB1, the device can sustain its full 3.0 W power rating when TAB 1 is maintained at ≤60°C-typically achieved using ≥1 cm² of 2-oz copper pour connected to the cathode pad.
Is the 1PMT5942A/TR13 compatible with standard SMT assembly processes?
Yes, the 1PMT5942A/TR13 is fully compatible with standard SMT assembly, including reflow soldering per J-STD-020 profiles. Its Powermite® package conforms to EIA-481 tape-and-reel standards (7-inch reel, 3,000 pieces), and the full metallic bottom eliminates solder flux entrapment-a known reliability risk in plastic-molded SMT packages. The locking tab also enhances placement accuracy during automated insertion.
What is the maximum reverse leakage current for 1PMT5942A/TR13 at its rated voltage?
The 1PMT5942A/TR13 has a maximum reverse leakage current (IR) of 1100 µA at a reverse voltage (VR) of 38.8 V, as specified in the Microsemi MSC0995 datasheet. This value is measured at TL = 30°C and reflects worst-case leakage under conditions well below the 51 V Zener breakdown point-ensuring minimal standby power loss in always-on protection circuits.
Does the 1PMT5942A/TR13 meet industrial temperature requirements?
Yes, the 1PMT5942A/TR13 is rated for junction and storage temperatures from -55°C to +150°C, satisfying extended industrial and automotive under-hood requirements. Its Powermite® package maintains mechanical integrity and electrical stability across this full range, and the 30°C/W thermal resistance enables predictable derating curves for high-temperature operation-critical for applications like motor drives and battery management systems.
1PMT5942A/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
1PMT5942A/TR13 FAQ
1.How can I place an order for 1PMT5942A/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT5942A/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 1PMT5942A/TR13 reliable?
The price and inventory of 1PMT5942A/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT5942A/TR13 is usually 5 days.
3.What payment methods are accepted for 1PMT5942A/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT5942A/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT5942A/TR13?
1PMT5942A/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT5942A/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 1PMT5942A/TR13?
For technical support, including 1PMT5942A/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT5942A/TR13 requirements.
6.How does Aetrix verify that 1PMT5942A/TR13 is sourced from the original manufacturer or authorized distributors?
All 1PMT5942A/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 1PMT5942A/TR13 meets industry standards.
7.What is the process for return or replacement of 1PMT5942A/TR13?
All 1PMT5942A/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT5942A/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 1PMT5942A/TR13 part is unused and in its original packaging.
Return procedure for 1PMT5942A/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT5942A/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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