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onsemi 1PMT22AT1G
- Part No.:
- 1PMT22AT1G
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-216AA
- Datasheet:
-
1PMT22AT1G.pdf
- Description:
- TVS DIODE 22VWM 35.5VC POWERMITE
- Quantity:
- Payment:
- Shipping:
Inventory:3,852
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Product details
Overview
1PMT22AT1G from onsemi is a unidirectional Zener transient voltage suppressor (TVS) in the POWERMITE® package, designed for overvoltage protection of sensitive electronics. It features a 22 V working peak reverse voltage (VRWM), 25.6 V nominal breakdown voltage (VBR) at 1 mA, 35.5 V maximum clamping voltage (VC) at 5.6 A peak pulse current, <1 ns response time, and 200 W peak pulse power (10/1000 µs). It is deployed in portable power rails, USB interface lines, and DC input stages of consumer power supplies.
For engineers reviewing the 1PMT22AT1G datasheet, pinout, applications, or equivalent options, key selection criteria include clamping performance under 5.6 A surge, thermal resistance to cathode tab (3.2 °C/W), low-profile mounting (1.1 mm max height), and Pb-free DO-216AA compliance for space-constrained PCB layouts.
Technical Context
The 1PMT22AT1G operates as a unidirectional Zener TVS diode, leveraging avalanche breakdown to clamp transients above its VRWM of 22 V. Its clamping action begins at VBR = 24.4–26.9 V (min–max at 1 mA), limiting downstream voltage to ≤35.5 V during a 10/1000 µs surge up to 5.6 A.
Thermally, it uses an integral metallic cathode tab for direct heat sinking, achieving RJcathode = 3.2 °C/W - enabling sustained power dissipation at Ttab = 75°C. Its POWERMITE package (DO-216AA) delivers SMA-equivalent thermal performance in 50% less footprint area (8.45 mm²) and 1.1 mm profile.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Peak Reverse Voltage (VRWM) | 22 V - Maximum continuous DC or peak AC voltage the device blocks without clamping; sets minimum operating rail compatibility. |
| Breakdown Voltage (VBR) @ 1 mA | 24.4–26.9 V - Voltage at which avalanche conduction initiates; defines turn-on threshold tolerance band. |
| Clamping Voltage (VC) @ IPP = 5.6 A | 35.5 V - Maximum voltage seen by protected circuit during standardized 10/1000 µs surge; critical for IC survival margin. |
| Peak Pulse Power (Ppk) | 200 W @ 10/1000 µs - Surge energy handling capacity; validates protection against IEC 61000-4-5 Level 3/4 transients. |
| Response Time | <1 ns - Time from transient onset to clamping engagement; ensures protection before logic-level damage occurs. |
| Thermal Resistance (Junction-to-Cathode Tab) | 3.2 °C/W - Enables high-power transient dissipation via PCB copper pour under cathode; supports >23 W steady-state at Ttab = 75°C. |
| ESD Rating (HBM) | Class 3 (>16 kV) - Withstands human-body-model ESD events without degradation; suitable for handheld device I/O ports. |
Pinout & Package
1PMT22AT1G is housed in the POWERMITE® package (JEDEC DO-216AA), a surface-mount, low-profile (1.1 mm max height), thermally enhanced plastic case with full metallic bottom and integral heatsink tabs. Cathode is marked by a polarity band; leads are lead-free and RoHS compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Transient current sink / Heat path | Connected to system ground or low-impedance return; serves as primary thermal interface to PCB copper pour. |
| 2 (Anode) | Protected line connection | Connected to signal or power line requiring clamping; reverse-biased during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile POWERMITE® package | 1.1 mm max height and 8.45 mm² footprint - enables placement in ultra-thin mobile devices and dense power modules. |
| Integral cathode heatsink tabs | Direct metal-to-PCB thermal path - achieves 3.2 °C/W junction-to-tab resistance without external heatsinks. |
| Full metallic bottom construction | Eliminates flux entrapment during reflow - improves solder joint reliability and reduces post-solder cleaning requirements. |
| Pb-free and RoHS-compliant | Meets global environmental regulations - supports green manufacturing and export compliance for consumer electronics. |
| Cathode orientation in tape | Cathode (short lead) aligned to sprocket holes - ensures consistent automated placement and avoids polarity misalignment. |
Applications
| USB 2.0 Data Line Protection | Smartphone DC Input Stage |
|---|---|
Use Scenario: Protecting D+ and D− lines from ESD and cable discharge events in portable chargers and accessories. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient energy before it reaches USB transceiver ICs. Use Value: Clamps to ≤35.5 V within <1 ns while maintaining <1 µA leakage at 22 V - preserving signal integrity and preventing PHY latch-up. |
Use Scenario: Safeguarding battery charging IC inputs against load dump and hot-plug surges in compact smartphones. IC Role / Device Role / Timing Role: Primary overvoltage clamp on VBUS or battery input rail, placed adjacent to power management IC. Use Value: Absorbs 200 W (10/1000 µs) without failure, leveraging 3.2 °C/W thermal resistance to sustain repeated surges in confined board areas. |
| Industrial Sensor Signal Conditioning | Point-of-Sale Terminal Power Supply |
Use Scenario: Shielding 24 V analog sensor outputs from inductive switching noise and field wiring transients. IC Role / Device Role / Timing Role: Zener TVS placed at sensor amplifier input to limit fault voltage to safe levels for op-amp input stages. Use Value: 22 V VRWM matches common industrial supply rails; 35.5 V VC ensures downstream amplifiers remain within absolute maximum ratings. |
Use Scenario: Protecting 12 V/24 V DC-DC converter inputs in retail terminals exposed to AC line transients and EFT bursts. IC Role / Device Role / Timing Role: Front-end transient suppressor on main DC input before bulk capacitor and controller IC. Use Value: 200 W surge rating and DO-216AA footprint allow robust protection without increasing board area - critical for cost-sensitive embedded designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Same VRWM (22 V) and VC (35.5 V), but SMA package (2.5 mm height, 45 mm² footprint); RJA = 100 °C/W vs. 248 °C/W for 1PMT22AT1G. | Requires more board area and offers inferior thermal coupling; suited for non-space-constrained industrial boards. | Select SMAJ22A only if legacy SMA footprint reuse is required and height is not constrained. |
| 1.5SMC22A | Higher Ppk (1500 W @ 10/1000 µs), but larger SMC package (7.1 mm × 6.2 mm × 2.6 mm); no integral heatsink tabs; RJA = 15 °C/W (mounted). | Targets higher-energy surges (e.g., automotive load dump), but incompatible with ultra-thin or high-density layouts. | Choose 1.5SMC22A when surge energy exceeds 200 W and thermal mass can be added via large copper pours. |
Compared with SMAJ22A and 1.5SMC22A, the 1PMT22AT1G delivers identical electrical protection in a footprint 5.3× smaller than SMAJ22A and 12× smaller than 1.5SMC22A, with superior thermal efficiency via its cathode-tab architecture - making it optimal for next-generation portable and embedded systems where size and thermal performance are co-constrained.
Availability
1PMT22AT1G is available at Aetrix Electronics and suitable for USB interface protection, smartphone power input conditioning, and industrial sensor signal line safeguarding requiring stable component supply across high-mix production runs.
Supply support for 1PMT22AT1G 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 specializing in energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1PMT22AT1G belongs to the 1PMT5.0AT1G/T3G Series - a family of unidirectional Zener TVS diodes engineered for space-constrained, thermally demanding overvoltage protection in portable and battery-powered electronics.
FAQ
What is the clamping voltage of the 1PMT22AT1G under a standard 10/1000 µs surge?
The 1PMT22AT1G exhibits a maximum clamping voltage (VC) of 35.5 V when subjected to its rated peak pulse current of 5.6 A under the 10/1000 µs waveform. This value is guaranteed across temperature and process variation per the onsemi datasheet, ensuring predictable protection for downstream 3.3 V or 5 V logic interfaces connected to the same rail.
Is the 1PMT22AT1G compatible with lead-free reflow soldering processes?
Yes, the 1PMT22AT1G is Pb-free and RoHS compliant, qualified for lead-free reflow soldering at 260°C for 10 seconds maximum. Its thermosetting plastic case and corrosion-resistant leads meet IPC-J-STD-020 moisture sensitivity level (MSL) 1 requirements, eliminating pre-bake needs and supporting standard SMT assembly lines.
How does the POWERMITE® package of the 1PMT22AT1G improve thermal performance compared to standard SMA?
The 1PMT22AT1G's POWERMITE® package achieves SMA-equivalent thermal performance using a full metallic bottom and integral cathode heatsink tabs, delivering RJcathode = 3.2 °C/W. This allows >23 W steady-state dissipation at Ttab = 75°C - whereas standard SMA packages rely on less efficient junction-to-ambient paths (RJA ≈ 100 °C/W) and lack direct thermal anchoring.
Can the 1PMT22AT1G be used for bidirectional transient suppression?
No, the 1PMT22AT1G is a unidirectional Zener TVS diode, intended for DC or single-polarity signal lines. It conducts only when reverse-biased beyond VRWM. For AC or bidirectional signal lines (e.g., RS-485, CAN), a bidirectional variant such as 1PMT22AT1G's counterpart in the same series - or a dedicated bidirectional TVS - must be selected.
What is the ESD withstand capability of the 1PMT22AT1G?
The 1PMT22AT1G is rated Class 3 per the Human Body Model (HBM), withstanding >16 kV ESD discharges. This rating is verified per ANSI/ESDA/JEDEC JS-001 and ensures robustness against handling and system-level ESD events in end-user environments like consumer handheld devices and point-of-sale terminals.
1PMT22AT1G 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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- 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
1PMT22AT1G FAQ
1.How can I place an order for 1PMT22AT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1PMT22AT1G 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 1PMT22AT1G reliable?
The price and inventory of 1PMT22AT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1PMT22AT1G is usually 5 days.
3.What payment methods are accepted for 1PMT22AT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1PMT22AT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1PMT22AT1G?
1PMT22AT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1PMT22AT1G 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 1PMT22AT1G?
For technical support, including 1PMT22AT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1PMT22AT1G requirements.
6.How does Aetrix verify that 1PMT22AT1G is sourced from the original manufacturer or authorized distributors?
All 1PMT22AT1G 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 1PMT22AT1G meets industry standards.
7.What is the process for return or replacement of 1PMT22AT1G?
All 1PMT22AT1G units undergo pre-shipment inspection (PSI). If there is an issue with 1PMT22AT1G, 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 1PMT22AT1G part is unused and in its original packaging.
Return procedure for 1PMT22AT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1PMT22AT1G Tags
-
ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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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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