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Vishay General Semiconductor - Diodes Division P4SMA15CAHM3/H
- Part No.:
- P4SMA15CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA15CAHM3/H.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,103
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Product details
Overview
P4SMA15CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal and power lines. It features a 15 V standoff voltage (VWM), 17.1 V minimum breakdown voltage (VBR), 21.2 V maximum clamping voltage at 18.9 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used in automotive sensor protection and industrial I/O interfaces.
For engineers reviewing the P4SMA15CAHM3/H datasheet, P4SMA15CAHM3/H pinout, P4SMA15CAHM3/H application, or P4SMA15CAHM3/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, clamping performance under surge conditions, and direct alternative part comparisons for ESD and lightning transient protection design.
Technical Context
The P4SMA15CAHM3/H operates as a bidirectional avalanche diode, symmetrically clamping positive and negative transients above ±17.1 V breakdown threshold. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), enabling protection of low-voltage analog and digital signal paths without signal distortion.
Rated for 400 W peak pulse power (10/1000 µs), it delivers 18.9 A IPPM with 21.2 V VC while maintaining 120 °C/W junction-to-ambient thermal resistance. The device is halogen-free, RoHS-compliant, and qualified to AEC-Q101 - confirming suitability for automotive-grade PCBs operating from –65 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 15 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown) | 17.1 V min / 18.9 V max at 1.0 mA - Confirmed avalanche onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping) | 21.2 V max at 18.9 A - Peak voltage seen by protected circuit during 10/1000 µs surge; limits stress on downstream ICs. |
| PPPM | 400 W - Sustains single 10/1000 µs transient energy without failure; derates to 300 W above 91 V per spec. |
| ID (Leakage) | ≤1.0 µA at 15 V - Ultra-low reverse leakage preserves signal integrity and battery life in always-on circuits. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and high-temperature industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, matte tin-plated leads. Molding compound meets UL 94 V-0. No polarity marking - bidirectional symmetry eliminates orientation concerns during automated placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Conducts during negative surges; forms symmetrical clamping pair with cathode terminal. |
| Cathode | Transient return path (bidirectional) | Conducts during positive surges; electrically identical to anode in CA-series devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN FD) without polarity constraints. |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV surge) on 2 Ω source impedance when properly laid out on 5 mm × 5 mm copper pads. |
| AEC-Q101 qualification | Validates long-term reliability in automotive applications including engine control modules, ADAS sensors, and body electronics. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a/5a), improving protection margin for 3.3 V/5 V logic. |
| MSL Level 1 (260 °C) | Supports standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting LIN bus transceivers and pressure sensor outputs in engine bay modules exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS clamp limiting transient excursions to ≤21.2 V during 10/1000 µs surges. Use Value: Prevents latch-up or gate oxide damage in 5 V analog front-end ICs while maintaining signal fidelity below 15 V normal operation. |
Use Scenario: Shielding 24 V PLC digital input channels from field-wiring induced surges and electrostatic discharge. IC Role / Device Role / Timing Role: Fast-response voltage limiter placed upstream of optocoupler input or Schmitt-trigger buffer. Use Value: Ensures system-level immunity to IEC 61000-4-4 (EFT) and IEC 61000-4-5 (surge) without adding series impedance or propagation delay. |
| Telecom Line Interface | Consumer USB Port Protection |
Use Scenario: Safeguarding Ethernet PHY magnetics and PoE interface components against lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Common-mode TVS pair (two P4SMA15CAHM3/H) across transformer center taps. Use Value: Clamps differential and common-mode surges simultaneously while preserving 100 Ω impedance matching up to 100 MHz. |
Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D– lines in portable audio devices and smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp (CJ ≈ 200 pF at 0 V) placed after primary TVS array. Use Value: Adds <±15 kV contact ESD robustness per IEC 61000-4-2 without degrading signal rise/fall times beyond USB 2.0 spec. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA | Higher 600 W PPPM rating; larger SMB (DO-214AA) package; 120 °C/W RθJA vs. 120 °C/W for P4SMA15CAHM3/H. | Preferred where higher surge margin is required and board space allows larger footprint. | Select SMBJ15CA when designing for IEC 61000-4-5 Level 5 or repeated surge exposure in industrial gateways. |
| 1.5KE15CA | Through-hole TO-204AE (DO-201AE); 1500 W PPPM; 50 A IPPM; significantly higher thermal mass but incompatible with SMT assembly. | Used in legacy designs or high-reliability power supply inputs where manual assembly or wave soldering is acceptable. | Choose 1.5KE15CA only if through-hole mounting is mandated and PCB layout cannot accommodate surface-mount footprint. |
Compared with SMBJ15CA and 1.5KE15CA, the P4SMA15CAHM3/H offers optimal balance of AEC-Q101 qualification, compact SMA footprint, and 400 W surge capability - making it the preferred choice for space-constrained automotive and industrial SMT designs requiring certified reliability.
Availability
P4SMA15CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interfaces, and consumer USB port protection requiring stable component supply and full traceability.
Supply support for P4SMA15CAHM3/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series targets cost-sensitive, high-volume transient protection needs in automotive, industrial, and communications systems - delivering AEC-Q101-qualified TVS performance in compact, automated-placement-ready packages.
FAQ
What is the clamping voltage of P4SMA15CAHM3/H at its rated peak pulse current?
The P4SMA15CAHM3/H has a maximum clamping voltage (VC) of 21.2 V at 18.9 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per Figure 1 in the official Vishay datasheet (Document Number: 88367, Rev. 09-Jan-2024) and reflects worst-case voltage seen by protected circuitry during standardized surge events. The P4SMA15CAHM3/H maintains this clamping performance across its qualified temperature range.
Is P4SMA15CAHM3/H suitable for automotive applications?
Yes, the P4SMA15CAHM3/H is AEC-Q101 qualified and explicitly designated for automotive use with suffix "HM3" indicating halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. It supports operating junction temperatures from –65 °C to +150 °C and passes stress tests including temperature cycling, high-temperature reverse bias, and ESD per JESD22 standards - making P4SMA15CAHM3/H appropriate for engine control units, ADAS sensors, and body electronics.
What does the "CA" suffix mean in P4SMA15CAHM3/H?
The "CA" suffix in P4SMA15CAHM3/H denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., P4SMA15A), the P4SMA15CAHM3/H has no polarity marking and functions identically in either orientation - simplifying layout and eliminating risk of incorrect placement during automated assembly.
What is the standoff voltage (VWM) rating for P4SMA15CAHM3/H?
The standoff voltage (VWM) for P4SMA15CAHM3/H is 15 V - the maximum DC or continuous peak reverse voltage the device can withstand without entering avalanche conduction. This parameter ensures reliable operation in 12 V automotive systems and 15 V industrial control rails, providing a 2 V margin below the 17.1 V minimum breakdown voltage (VBR) to prevent false triggering during normal operation.
How does the thermal resistance of P4SMA15CAHM3/H affect PCB layout?
The P4SMA15CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended pad layout (0.2" × 0.2" copper pads per terminal). To maintain safe junction temperature under repetitive surge conditions, designers must ensure adequate copper area and avoid excessive trace length - because exceeding TJ max of +150 °C risks parametric shift or failure. The P4SMA15CAHM3/H's thermal behavior is validated per JEDEC test conditions in the Vishay datasheet.
P4SMA15CAHM3/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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 18.9A
- 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)
P4SMA15CAHM3/H FAQ
1.How can I place an order for P4SMA15CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA15CAHM3/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 P4SMA15CAHM3/H reliable?
The price and inventory of P4SMA15CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA15CAHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA15CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA15CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA15CAHM3/H?
P4SMA15CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA15CAHM3/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 P4SMA15CAHM3/H?
For technical support, including P4SMA15CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA15CAHM3/H requirements.
6.How does Aetrix verify that P4SMA15CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA15CAHM3/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 P4SMA15CAHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA15CAHM3/H?
All P4SMA15CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA15CAHM3/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 P4SMA15CAHM3/H part is unused and in its original packaging.
Return procedure for P4SMA15CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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