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Vishay General Semiconductor - Diodes Division P4SMA150CAHM3/H
- Part No.:
- P4SMA150CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA150CAHM3/H.pdf
- Description:
- TVS DIODE 128VWM 207VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,203
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Product details
Overview
P4SMA150CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, rated for 150 V standoff voltage (VWM), 179 V breakdown voltage (VBR min), and 207 V clamping voltage (VC) at 1.4 A peak pulse current (IPPM), delivering 400 W peak pulse power with 10/1000 µs waveform for protecting signal lines in automotive sensor units.
For engineers reviewing the P4SMA150CAHM3/H datasheet, P4SMA150CAHM3/H pinout, P4SMA150CAHM3/H application, or P4SMA150CAHM3/H equivalent, this device is selected for robust ESD and surge protection in AEC-Q101-compliant automotive electronics where low clamping voltage, fast response time, and halogen-free RoHS compliance are required.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with no polarity marking on the SMA package, enabling direct placement across differential or AC-coupled signal paths without orientation concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM).
Designed for transient suppression per IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive surge), it delivers 207 V clamping at 1.4 A IPPM and maintains thermal stability up to 150 °C junction temperature, with RθJA = 120 °C/W under standard PCB pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 150 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 12–48 V automotive systems. |
| VBR (Breakdown) | 179–198 V - Measured at 1 mA IT; ensures reliable turn-on above normal operating transients while avoiding false triggering. |
| VC (Clamping) | 207 V - Maximum voltage seen by protected circuit during 1.4 A 10/1000 µs surge; determines downstream component voltage stress. |
| PPPM | 400 W - Peak pulse power handling with 10/1000 µs waveform; supports high-energy surges common in load-dump and inductive switching events. |
| ID (Leakage) | <1.0 µA at VWM - Ultra-low reverse leakage preserves signal integrity and battery life in always-on automotive modules. |
| TJ max | +150 °C - Enables operation in under-hood environments without derating in most mounting configurations. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C peak reflow). Cathode band absent - bidirectional symmetry eliminates polarity dependency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative half-cycle) | Conducts surge current when voltage falls below -VBR; symmetrical with cathode for bidirectional clamping. |
| Cathode | Transient current entry (positive half-cycle) | Conducts surge current when voltage exceeds +VBR; functionally identical to anode due to bidirectional construction. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN FD, LIN), and ungrounded sensor outputs without external polarity management. |
| 400 W peak pulse power | Withstands high-energy transients from load dump (ISO 7637-2 Pulse 5a) and relay coil flyback in 12 V/24 V automotive subsystems. |
| Halogen-free & AEC-Q101 qualified | Meets automotive OEM material compliance requirements and long-term reliability validation for engine control, ADAS, and body electronics. |
| Low clamping ratio (VC/VBR ≈ 1.16) | Minimizes overvoltage stress on protected ICs-critical for safeguarding 3.3 V or 5 V microcontrollers and transceivers in harsh environments. |
| MSL Level 1 rating | Allows unlimited floor life and standard SMT reflow without baking, reducing manufacturing complexity and cost in high-volume automotive assembly. |
Applications
| Automotive Sensor Protection | CAN FD Bus Protection |
|---|---|
Use Scenario: Protecting wheel speed, pressure, or temperature sensors exposed to load-switching noise and ESD in engine bays. IC Role / Device Role / Timing Role: Bidirectional TVS placed across sensor output pins to clamp ±200 V transients before reaching analog front-end or ADC input. Use Value: Prevents latch-up or permanent damage to precision op-amps and microcontroller GPIOs while maintaining signal fidelity below 150 V normal operation. |
Use Scenario: Safeguarding CAN FD transceivers (e.g., TJA1057) against coupled surges on data lines in vehicle networking. IC Role / Device Role / Timing Role: Low-capacitance TVS mounted directly at connector interface to suppress fast-rising EFT bursts without distorting 5 Mbps data edges. Use Value: Maintains bus integrity during ISO 7637-3 testing by limiting line voltage to ≤207 V, ensuring error-free communication during EMC immunity tests. |
| Industrial PLC I/O Protection | Consumer Power Adapter Feedback Loop |
Use Scenario: Shielding digital input modules from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: TVS placed between terminal block and optocoupler input to absorb 1 kV/500 A lightning-induced surges per IEC 61000-4-5. Use Value: Eliminates need for secondary protection stages, reducing BOM count and PCB area while meeting UL 61000-4-5 Level 4 requirements. |
Use Scenario: Securing voltage feedback path in isolated AC/DC adapters against coupling from primary-side MOSFET switching noise. IC Role / Device Role / Timing Role: Bidirectional clamp across TL431 reference input to prevent false regulation during 15 kV ESD discharge events. Use Value: Avoids output voltage drift or shutdown during user-handling ESD, improving adapter reliability in Class II consumer applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ150CA | Same VWM (150 V), higher VC (243 V), larger SMB package (DO-214AA), 600 W PPPM rating | Higher clamping voltage increases protected IC stress; larger footprint limits dense layout use | Select when higher surge energy tolerance is needed and board space permits larger package |
| 1.5KE150CA | Same VWM (150 V), same VC (207 V), axial-leaded DO-15 package, 1500 W PPPM | Through-hole mounting incompatible with automated SMT lines; unsuitable for high-vibration automotive environments | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with P4SMA150CAHM3/H, SMBJ150CA offers greater surge headroom but sacrifices clamping performance and board density, while 1.5KE150CA provides superior energy handling at the cost of manufacturability and mechanical robustness in automotive SMT assemblies.
Availability
P4SMA150CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, CAN FD network nodes, industrial PLC I/O terminals, and consumer power adapter feedback circuits requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for P4SMA150CAHM3/H 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, and protection devices with emphasis on automotive, industrial, and computing applications.
The P4SMA Series was developed to deliver high-reliability, surface-mount TVS solutions for automotive electronics requiring AEC-Q101 qualification, low-profile packaging, and precise clamping performance across wide temperature ranges.
FAQ
What is the clamping voltage of P4SMA150CAHM3/H at its rated peak pulse current?
The P4SMA150CAHM3/H has a maximum clamping voltage (VC) of 207 V at 1.4 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per Figure 1 and Table on page 2 of Vishay document 88367 and defines the upper voltage limit imposed on protected circuitry during surge events. The P4SMA150CAHM3/H maintains this clamping performance across its specified operating temperature range.
Is P4SMA150CAHM3/H suitable for automotive applications?
Yes, P4SMA150CAHM3/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials per Vishay's HM3 suffix designation. It meets automotive requirements for temperature cycling, high-temperature reverse bias, and ESD robustness. The P4SMA150CAHM3/H is explicitly intended for under-hood and chassis-mounted electronics where sustained operation up to +150 °C junction temperature and resistance to mechanical vibration are essential.
Does P4SMA150CAHM3/H have polarity markings on the package?
No, P4SMA150CAHM3/H does not feature a cathode band or other polarity marking because it is a bidirectional TVS diode. Its symmetrical construction allows installation in either orientation across differential or AC-coupled signal paths. This eliminates orientation errors during automated placement and simplifies layout for interfaces like CAN, LIN, or RS-485 where polarity independence is advantageous.
What is the thermal resistance of P4SMA150CAHM3/H from junction to ambient?
The typical thermal resistance from junction to ambient (RθJA) for P4SMA150CAHM3/H is 120 °C/W when mounted on the minimum recommended 0.2" x 0.2" (5.0 mm x 5.0 mm) copper pads per terminal, as specified in Vishay document 88367. This value assumes still air conditions and defines the temperature rise above ambient per watt of steady-state power dissipation. The P4SMA150CAHM3/H relies primarily on transient surge handling rather than continuous power dissipation.
How does P4SMA150CAHM3/H differ from unidirectional P4SMA150A variants?
P4SMA150CAHM3/H is bidirectional with symmetrical clamping in both polarities and no cathode marking, whereas unidirectional P4SMA150A has a cathode band and conducts only during positive overvoltage events. The "CA" suffix denotes bidirectionality, and "HM3" confirms halogen-free, RoHS-compliant, AEC-Q101-qualified construction. The P4SMA150CAHM3/H is used where AC transients or differential noise must be suppressed without polarity constraints-unlike P4SMA150A, which is limited to DC-biased lines.
P4SMA150CAHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 128V
- Voltage - Breakdown (Min):
- 143V
- Voltage - Clamping (Max) @ Ipp:
- 207V
- Current - Peak Pulse (10/1000µs):
- 1.4A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA150CAHM3/H FAQ
1.How can I place an order for P4SMA150CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA150CAHM3/H 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 P4SMA150CAHM3/H reliable?
The price and inventory of P4SMA150CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA150CAHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA150CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA150CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA150CAHM3/H?
P4SMA150CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA150CAHM3/H 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 P4SMA150CAHM3/H?
For technical support, including P4SMA150CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA150CAHM3/H requirements.
6.How does Aetrix verify that P4SMA150CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA150CAHM3/H 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 P4SMA150CAHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA150CAHM3/H?
All P4SMA150CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA150CAHM3/H, 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 P4SMA150CAHM3/H part is unused and in its original packaging.
Return procedure for P4SMA150CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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