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Vishay General Semiconductor - Diodes Division P4SMA15CAHM3_A/H
- Part No.:
- P4SMA15CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA15CAHM3_A/H.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P4SMA15CAHM3_A/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 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 capability with 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and ICs in automotive and industrial control systems.
For engineers reviewing the P4SMA15CAHM3_A/H datasheet, P4SMA15CAHM3_A/H pinout, P4SMA15CAHM3_A/H application, or P4SMA15CAHM3_A/H equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance data, clamping performance under surge conditions, and direct alternatives for ESD and lightning transient protection design.
Technical Context
The P4SMA15CAHM3_A/H operates as a bidirectional avalanche diode, symmetrically clamping positive and negative transients without polarity dependence. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at 12.8 V), while MSL Level 1 moisture sensitivity supports lead-free reflow up to 260 °C peak.
It delivers 400 W peak pulse power (10/1000 µs) at 25 °C, derating linearly above TA = 25 °C per Figure 2, with typical junction-to-ambient thermal resistance of 120 °C/W on standard 0.2" × 0.2" copper pads. The device meets AEC-Q101 stress test requirements and is halogen-free and RoHS-compliant under HM3 suffix.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 12.8 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 14.3–15.8 V at 1.0 mA - Confirmed avalanche initiation range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 21.2 V at 18.9 A IPPM - Peak voltage seen by protected circuit during 10/1000 µs surge; critical for downstream component survivability. |
| PPPM (Peak Pulse Power) | 400 W - Sustained transient energy absorption capacity under standardized waveform; enables robust protection against IEC 61000-4-5 surges. |
| TJ max | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive and high-ambient industrial environments. |
| RθJA | 120 °C/W - Thermal resistance from junction to ambient on minimal pad layout; informs heatsinking and board layout decisions. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing per AEC specification. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, halogen-free, RoHS-compliant, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. Bidirectional construction means no polarity marking; both terminals are electrically symmetrical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical terminals enable bidirectional clamping; no orientation required during placement - simplifies automated assembly and reduces BOM complexity. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 Level 3 (1 kV line-to-line, 2 kV line-to-ground) surge immunity without external series impedance. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain, body electronics, and ADAS modules requiring zero-defect reliability over 15-year service life. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free assembly without preconditioning; eliminates moisture-related popcorning risk in high-volume manufacturing. |
| Glass passivated junction | Ensures stable VBR tolerance (±5 %), low leakage (<1 µA), and long-term parameter stability under thermal cycling and humidity stress. |
| SMA (DO-214AC) footprint | Standardized 5.28 mm × 4.50 mm outline compatible with existing TVS placement tooling and IPC-7351B land patterns. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential or single-ended signal lines upstream of precision amplifiers or ADC front-ends. Use Value: Limits transient voltage to ≤21.2 V during 18.9 A surge, preventing latch-up or gate oxide damage in downstream ASICs and microcontrollers. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers exposed to field wiring surges and ESD events. IC Role / Device Role / Timing Role: Primary overvoltage clamp mounted directly at connector entry point, shunting surge energy before it reaches isolation barriers or signal conditioning stages. Use Value: Maintains signal integrity by clamping within 1 ns response time while surviving repetitive 400 W pulses per IEC 61000-4-4 burst testing. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding Ethernet PHY interfaces, DSL line drivers, and PoE-powered ports from lightning-induced surges and AC mains coupling in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Secondary-level TVS deployed after gas discharge tube (GDT) primary protection to handle residual fast-rising transients. Use Value: Delivers 21.2 V clamping at 18.9 A with <1 ns response, ensuring compliance with GR-1089-CORE and ITU-T K.20/21 standards. |
Use Scenario: Suppressing commutation spikes from brushed DC motors and relay coils in washing machines, HVAC blowers, and smart home actuators. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor across motor terminals or relay coil to absorb inductive kickback energy. Use Value: Withstands 40 A IFSM (unidirectional equivalent) and repeated 400 W pulses, extending relay contact life and preventing MCU reset from supply rail disturbance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA | Higher package thermal mass (SMB/DO-214AA); 15 V VWM, 24.4 V VC at 16.6 A; 600 W PPPM rating. | Better suited for higher-energy surges where PCB space allows larger footprint; less optimal for ultra-dense layouts. | Select SMBJ15CA when system-level surge tests exceed 400 W or when board layout permits larger pad area for improved thermal dissipation. |
| 1.5SMC15CA | Same VWM/VC specs but in larger SMC (DO-214AB) package; 1500 W PPPM; RθJA ≈ 35 °C/W with adequate copper. | Used in high-reliability industrial power supplies and base station equipment requiring multi-kW surge handling. | Choose 1.5SMC15CA only if application demands >600 W pulse capability and thermal management infrastructure supports SMC footprint. |
Compared with P4SMA15CAHM3_A/H, SMBJ15CA offers higher pulse power but requires more board area, while 1.5SMC15CA provides threefold energy handling at the cost of significantly larger size and different thermal design constraints - making P4SMA15CAHM3_A/H optimal for space-constrained AEC-Q101-compliant designs needing precise 400 W clamping.
Availability
P4SMA15CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, telecom line cards, and consumer appliance motor drives requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA15CAHM3_A/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 passive components with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series is engineered for high-reliability transient suppression in automotive, industrial, and telecom systems - delivering AEC-Q101-qualified, halogen-free TVS diodes in compact surface-mount packages with consistent clamping performance.
FAQ
What is the clamping voltage of P4SMA15CAHM3_A/H at its rated peak pulse current?
The P4SMA15CAHM3_A/H has a maximum clamping voltage (VC) of 21.2 V at 18.9 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per Figure 1 in the Vishay datasheet 88367 and represents the upper limit of voltage imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings. The P4SMA15CAHM3_A/H maintains this clamping performance across its full operating temperature range.
Is P4SMA15CAHM3_A/H suitable for automotive applications?
Yes, P4SMA15CAHM3_A/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials under the HM3 suffix. It passes stress tests including high-temperature operating life, temperature cycling, and unbiased HAST - making it approved for use in automotive body electronics, infotainment interfaces, and ADAS sensor signal conditioning. The P4SMA15CAHM3_A/H is explicitly designated for automotive-grade reliability per Vishay's ordering information table.
What does the "CA" suffix indicate in P4SMA15CAHM3_A/H?
The "CA" suffix in P4SMA15CAHM3_A/H denotes a bidirectional configuration, meaning the device clamps voltage transients equally in both polarities - ideal for protecting AC-coupled lines, differential buses like CAN or RS-485, and ungrounded signal paths. Unlike unidirectional variants (e.g., P4SMA15A), the P4SMA15CAHM3_A/H has no cathode band marking and exhibits identical VBR and VC characteristics in either direction.
What is the thermal resistance of P4SMA15CAHM3_A/H, and how does it affect layout?
The P4SMA15CAHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimal PCB copper; increasing pad area or adding internal ground planes lowers effective RθJA. For reliable 400 W pulse handling, designers must ensure the P4SMA15CAHM3_A/H is placed on thermally robust land patterns - inadequate copper will cause junction overheating and premature failure during repetitive surges.
How does P4SMA15CAHM3_A/H compare to unidirectional P4SMA15A in terms of application use?
The P4SMA15CAHM3_A/H is bidirectional and used where signal lines lack defined polarity - such as differential pairs, AC signals, or floating grounds - while P4SMA15A is unidirectional and intended for DC-biased lines like power rails or single-ended digital I/O with known cathode/anode orientation. The P4SMA15CAHM3_A/H eliminates orientation errors during placement and supports symmetrical transient suppression, whereas P4SMA15A offers slightly lower leakage (<1 µA vs. <1 µA) and same VWM but requires correct polarity alignment.
P4SMA15CAHM3_A/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:
- Active
- 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_A/H FAQ
1.How can I place an order for P4SMA15CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA15CAHM3_A/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_A/H reliable?
The price and inventory of P4SMA15CAHM3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for P4SMA15CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA15CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA15CAHM3_A/H?
P4SMA15CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA15CAHM3_A/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_A/H?
For technical support, including P4SMA15CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA15CAHM3_A/H requirements.
6.How does Aetrix verify that P4SMA15CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All P4SMA15CAHM3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of P4SMA15CAHM3_A/H?
All P4SMA15CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA15CAHM3_A/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_A/H part is unused and in its original packaging.
Return procedure for P4SMA15CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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