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onsemi 1PMT26AT1
- Part No.:
- 1PMT26AT1
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT26AT1.pdf
- Description:
- TVS DIODE 26VWM 42.1VC POWERMITE
- Quantity:
- Payment:
- Shipping:
Inventory:2,193
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Product details
Overview
1PMT26AT1 from onsemi is a unidirectional Zener transient voltage suppressor (TVS) in the POWERMITE® package, designed for clamping ESD and surge transients in low-voltage DC power rails. It features a 26 V working peak reverse voltage (VRWM), 42.1 V maximum clamping voltage at 4.8 A peak pulse current, 200 W peak pulse power (10/1000 µs), <1 ns response time, and 1.1 mm max height. It is used in portable electronics power input protection.
For engineers reviewing the 1PMT26AT1 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM matching system operating voltage, clamping voltage margin relative to IC absolute maximum ratings, thermal performance under repeated surge duty, and PCB space constraints requiring ultra-low-profile surface-mount protection.
Technical Context
This device operates as a unidirectional Zener-based TVS diode, conducting only during reverse overvoltage events above its breakdown threshold. Its clamping behavior is defined by a sharp Zener knee with low dynamic impedance, enabling fast energy diversion away from downstream circuitry.
Thermal management relies on its integral cathode-side metal tab (RJcathode = 3.2 °C/W) and full metallic bottom, allowing direct heat transfer to PCB copper. The POWERMITE package (JEDEC DO-216AA) delivers SMA-equivalent thermal performance in 50% less footprint area (8.45 mm²) and 1.1 mm max height.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 26 V - Maximum continuous reverse operating voltage before clamping begins; must exceed system nominal rail voltage. |
| VC @ IPP | 42.1 V @ 4.8 A - Clamped voltage seen by protected IC during 10/1000 µs surge; defines worst-case stress on downstream components. |
| PPK | 200 W @ 10/1000 µs - Peak transient power handling capacity; determines survivability against common IEC 61000-4-5 surges. |
| Response Time | <1 ns - Enables suppression before sensitive logic or analog circuits are exposed to damaging overvoltage. |
| ESD Rating | Class 3 (>16 kV HBM) - Meets stringent electrostatic discharge immunity requirements for handheld consumer devices. |
| Package | POWERMITE® (DO-216AA) - Surface-mount package with integral heatsink tabs and full metallic cathode bottom for enhanced thermal conduction. |
| Height | Max 1.1 mm - Enables use in ultra-thin portable designs where vertical clearance is constrained. |
Pinout & Package
The 1PMT26AT1 is housed in the POWERMITE® package (JEDEC DO-216AA), featuring a two-terminal surface-mount configuration with an integral cathode-side metal tab for thermal and mechanical anchoring. Cathode is marked by a polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Transient current sink node | Connected to ground or low-impedance return path; serves as primary thermal interface via metal tab. |
| 2 (Anode) | Protected line connection | Connected to the line being protected (e.g., USB VBUS, battery input); carries surge current into cathode during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile POWERMITE® package | 1.1 mm max height and 8.45 mm² footprint enable integration into space-constrained mobile PCBs without compromising thermal performance. |
| Integral cathode heatsink tabs | Reduces RJcathode to 3.2 °C/W, allowing efficient heat transfer to PCB copper and supporting higher surge repetition rates. |
| Full metallic bottom construction | Eliminates flux entrapment during reflow and ensures reliable solder joint formation and long-term mechanical stability. |
| Lead orientation in tape | Cathode (short lead) aligned to sprocket holes simplifies automated placement and ensures consistent polarity alignment in high-volume SMT lines. |
Applications
| USB Power Input Protection | Smartphone Battery Charging Circuit |
|---|---|
Use Scenario: Protecting USB Type-C VBUS line from hot-plug transients and ESD events during cable insertion. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBUS and GND to clamp overvoltage before it reaches USB controller or power management IC. Use Value: 26 V VRWM matches typical 5 V ±10% USB supply; 42.1 V clamping ensures protected ICs remain below 45 V absolute maximum rating. | Use Scenario: Safeguarding lithium-ion battery charge path from surge coupling through shared PCB traces or connector bounce. IC Role / Device Role / Timing Role: Transient suppressor installed at battery connector anode terminal to absorb energy from inductive switching or accidental short transients. Use Value: 200 W peak power rating withstands repeated 10/1000 µs surges; 1.1 mm profile avoids interference with stacked battery modules. |
| Industrial Sensor Node Power Rail | POS Terminal 12 V Auxiliary Supply |
Use Scenario: Securing 3.3 V or 5 V sensor node power input against induced surges from nearby motor or relay switching. IC Role / Device Role / Timing Role: Zener TVS placed directly at LDO input to limit transient amplitude before regulation stage. Use Value: Sub-1 ns response prevents overshoot propagation into low-noise analog front-end; low leakage (<1 µA) avoids loading precision reference paths. | Use Scenario: Protecting 12 V auxiliary rail feeding display backlight and card reader from load-dump transients in retail kiosk environments. IC Role / Device Role / Timing Role: Primary clamping device on 12 V rail upstream of DC-DC converters and linear regulators. Use Value: 26 V VRWM provides adequate margin above 12 V nominal; 175–200 W rating covers ISO 7637-2 Pulse 1 and Pulse 2a requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ26A | Same VRWM (26 V) and clamping (42.1 V), but SMA package (2.5 mm height, 2× larger footprint); RJA = 500 °C/W vs. 248 °C/W for 1PMT26AT1. | Less suitable for ultra-thin or high-density layouts; requires more board area and offers lower thermal efficiency under repetitive surges. | Select SMAJ26A only if legacy layout compatibility or higher single-pulse energy tolerance (400 W) is prioritized over size and thermal performance. |
| 1.5SMC27A | Higher VRWM (27 V), higher clamping (45.7 V), larger SMC package (2.5 mm height, 10.5 mm² footprint); rated for 1500 W peak pulse (8/20 µs). | Better suited for industrial 24 V systems needing higher standoff; not recommended for tight-margin 5 V or 12 V rails due to elevated clamping. | Choose 1.5SMC27A when protecting 24 V bus with higher surge exposure; avoid for 5 V/12 V portable designs where 1PMT26AT1's lower clamping and smaller size provide tighter protection margins. |
Compared with SMAJ26A and 1.5SMC27A, the 1PMT26AT1 delivers superior volumetric efficiency and thermal performance in compact, thermally constrained applications-enabling robust transient protection without sacrificing PCB real estate or requiring additional heatsinking.
Availability
1PMT26AT1 is available at Aetrix Electronics and suitable for USB power input protection, smartphone battery charging circuits, and industrial sensor node power rails requiring stable component supply and consistent RoHS-compliant sourcing.
Supply support for 1PMT26AT1 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and intelligent edge applications.
The 1PMT26AT1 belongs to the 1PMT5.0AT1G/T3G Series of Zener transient voltage suppressors, engineered specifically for space-constrained, high-reliability DC power line protection in portable and consumer electronics.
FAQ
What is the working peak reverse voltage (VRWM) of the 1PMT26AT1?
The 1PMT26AT1 has a working peak reverse voltage (VRWM) of 26 V. This value represents the maximum DC or continuous peak operating voltage the device can withstand without entering breakdown. It is critical that VRWM be equal to or greater than the nominal voltage of the line being protected-making the 1PMT26AT1 well-suited for 24 V industrial rails or 5 V/12 V systems with sufficient margin. The exact VRWM is confirmed in the Electrical Characteristics table on page 3 of the official 1PMT5.0AT1G/T3G Series datasheet.
Does the 1PMT26AT1 meet industry-standard ESD requirements?
Yes, the 1PMT26AT1 is rated for Class 3 ESD per the Human Body Model (HBM) with >16 kV capability. This exceeds the IEC 61000-4-2 Level 4 requirement (8 kV contact / 15 kV air) and ensures robust protection against common handling and operational electrostatic discharges in consumer and portable electronics. The ESD rating is explicitly stated in the Specification Features section of the 1PMT5.0AT1G/T3G Series datasheet.
What is the maximum clamping voltage of the 1PMT26AT1 at its rated peak pulse current?
The 1PMT26AT1 exhibits a maximum clamping voltage (VC) of 42.1 V at its specified peak pulse current (IPP) of 4.8 A under the standard 10/1000 µs waveform. This clamping voltage defines the upper voltage limit imposed on protected circuitry during transient events and must be verified against the absolute maximum ratings of downstream ICs. The value is measured and guaranteed per the test conditions in the Electrical Characteristics table (page 3) of the official datasheet.
Is the 1PMT26AT1 compatible with lead-free reflow soldering processes?
Yes, the 1PMT26AT1 is Pb-free and RoHS compliant, qualified for standard lead-free reflow profiles. Its maximum case temperature rating is 260°C for 10 seconds, aligning with IPC/JEDEC J-STD-020 moisture sensitivity level (MSL) requirements for surface-mount assembly. The device uses corrosion-resistant finishes and readily solderable leads, as confirmed in the Mechanical Characteristics section of the 1PMT5.0AT1G/T3G Series datasheet.
How does the POWERMITE® package of the 1PMT26AT1 improve thermal performance compared to traditional SOD-123 or SMA packages?
The POWERMITE® package of the 1PMT26AT1 incorporates an integral metallic cathode tab and full metallic bottom, achieving a junction-to-cathode thermal resistance (RJcathode) of just 3.2 °C/W-significantly lower than typical SMA packages (~15–20 °C/W). This enables more efficient heat transfer to the PCB, supporting higher surge repetition rates and improved reliability in thermally dense layouts. The package is JEDEC registered as DO-216AA and documented in the Package Dimensions section (page 6) of the datasheet.
1PMT26AT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-216AA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 26V
- Voltage - Breakdown (Min):
- 28.9V
- Voltage - Clamping (Max) @ Ipp:
- 42.1V
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- Powermite
1PMT26AT1 FAQ
1.How can I place an order for 1PMT26AT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT26AT1 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 1PMT26AT1 reliable?
The price and inventory of 1PMT26AT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT26AT1 is usually 5 days.
3.What payment methods are accepted for 1PMT26AT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT26AT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT26AT1?
1PMT26AT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT26AT1 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 1PMT26AT1?
For technical support, including 1PMT26AT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT26AT1 requirements.
6.How does Aetrix verify that 1PMT26AT1 is sourced from the original manufacturer or authorized distributors?
All 1PMT26AT1 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 1PMT26AT1 meets industry standards.
7.What is the process for return or replacement of 1PMT26AT1?
All 1PMT26AT1 units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT26AT1, 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 1PMT26AT1 part is unused and in its original packaging.
Return procedure for 1PMT26AT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT26AT1 Tags
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ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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