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Vishay General Semiconductor - Diodes Division P4SMA15AHM3_A/I
- Part No.:
- P4SMA15AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA15AHM3_A/I.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,480
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Product details
Overview
P4SMA15AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features 15 V breakdown voltage (VBR = 14.3–15.8 V at 1 mA), 12.8 V stand-off voltage (VWM), 21.2 V maximum clamping voltage (VC) at 18.9 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting automotive-grade sensor interfaces and industrial I/O circuits.
For engineers reviewing the P4SMA15AHM3_A/I datasheet, P4SMA15AHM3_A/I pinout, P4SMA15AHM3_A/I application, or P4SMA15AHM3_A/I equivalent, this part delivers AEC-Q101 qualification, halogen-free RoHS compliance, low incremental surge resistance, and fast response time - critical for ESD and load-switching transient suppression in safety-critical embedded systems.
Technical Context
The P4SMA15AHM3_A/I operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 µA at 12.8 V), while thermal resistance RθJA = 120 °C/W supports operation up to TJ = 150 °C under defined PCB pad layout (0.2" × 0.2" copper).
It meets JEDEC J-STD-020 MSL Level 1 and JESD201 Class 2 whisker resistance requirements. The device is rated for 40 A non-repetitive forward surge current (8.3 ms half-sine) and exhibits a temperature coefficient of VBR = +0.084 %/°C - enabling predictable clamping behavior across automotive temperature ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 14.3 V / 15.8 V at 1 mA - defines precise clamping onset; ±5% tolerance ensures consistent overvoltage protection margin |
| VWM | 12.8 V - maximum continuous reverse operating voltage before leakage rises; sets safe DC bias limit |
| VC @ IPPM | 21.2 V at 18.9 A - clamped voltage during 10/1000 µs transient; determines protected circuit's maximum stress level |
| PPPM | 400 W - peak pulse power handling capability; enables robust suppression of inductive switching spikes |
| IFSM | 40 A - single half-sine surge current rating; supports high-energy fault events without bond wire failure |
| TJ max | +150 °C - maximum junction temperature; allows use in under-hood automotive environments |
| AEC-Q101 | Qualified - validated for automotive reliability including HTOL, TC, UHAST, and ESD testing per AEC standard |
Pinout & Package
SMA (DO-214AC) surface-mount package with matte tin-plated leads, compliant with J-STD-002 and JESD22-B102 solderability standards. Cathode identified by black band; anode is unmarked end. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H); weight: 0.064 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail or CAN_H); conducts when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for Tier-1 automotive supply chains and industrial OEMs |
| 400 W peak pulse power (10/1000 µs) | Withstands high-energy transients from relay coil de-energization or motor commutation without degradation |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes voltage overshoot during clamping - critical for safeguarding 15 V-tolerant ICs and MOSFET gates |
| MSL Level 1, 260 °C reflow compatible | Enables standard SMT assembly without moisture sensitivity concerns or pre-bake requirements |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor VOUT and ground to clamp reverse transients and prevent latch-up in ADC front-end. Use Value: Clamps 12 V nominal lines to ≤21.2 V during 100 V/50 ms load dump events, preserving sensor accuracy and MCU interface integrity. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers against field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Standoff-rated TVS on input node to absorb repetitive 1 kV/500 A transients per IEC 61000-4-5 Level 3. Use Value: Limits voltage excursion to 21.2 V within <1 ns, preventing damage to optocoupler input stages and maintaining channel isolation. |
| Consumer Power Adapter Input | Telecom Line Interface |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters powering USB-C PD controllers and PMICs. IC Role / Device Role / Timing Role: Fast-response TVS across 15 V output rail to suppress flyback transformer ringing and rectifier reverse recovery spikes. Use Value: Maintains regulated 15 V output stability during 400 W transient events, avoiding brownout or reset of downstream SoCs. |
Use Scenario: Surge protection on RS-485 bus lines in base station remote radio units subjected to lightning-induced common-mode transients. IC Role / Device Role / Timing Role: Unidirectional TVS on each differential line (A/B) referenced to local ground to shunt asymmetrical surges. Use Value: Ensures <21.2 V differential swing during 10/1000 µs surges, preserving data integrity and preventing receiver saturation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15A-E3/5A | Same VBR range (14.3–15.8 V), but rated for 400 W at 25 °C only; no AEC-Q101 qualification; MSL Level 1, same SMA package | Commercial/industrial use only; not approved for automotive production or ASIL-B systems | Select when cost-sensitive non-automotive designs require identical electrical specs without qualification overhead |
| 1.5SMC15A | Higher package thermal resistance (RθJA ≈ 150 °C/W vs. 120 °C/W); same VBR, VC, and PPPM; DO-214AB (SMC) package, larger footprint | Requires more PCB area; less suitable for dense automotive modules where space is constrained | Choose when existing board layout uses SMC footprint or higher thermal mass is needed for sustained pulse duty cycles |
Compared with SMAJ15A-E3/5A and 1.5SMC15A, the P4SMA15AHM3_A/I uniquely combines AEC-Q101 qualification, halogen-free construction, and optimized thermal performance in the compact SMA outline - making it the preferred choice for next-generation automotive ECUs and space-constrained industrial controllers requiring long-term reliability assurance.
Availability
P4SMA15AHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line interface boards requiring stable component supply with full traceability and lifecycle continuity.
Supply support for P4SMA15AHM3_A/I 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, TVS devices, and power MOSFETs with emphasis on reliability and application-specific optimization.
The P4SMA series was developed for high-reliability transient suppression in automotive, industrial, and communications systems - delivering standardized TVS performance with AEC-Q101 validation and halogen-free packaging options.
FAQ
What is the clamping voltage of P4SMA15AHM3_A/I at its rated peak pulse current?
The P4SMA15AHM3_A/I has a maximum clamping voltage (VC) of 21.2 V at its specified peak pulse current (IPPM) of 18.9 A, measured using the standard 10/1000 µs double-exponential waveform. This value is guaranteed per the Vishay datasheet revision 09-Jan-2024 and reflects worst-case performance under defined test conditions with 0.2" × 0.2" copper pads. The P4SMA15AHM3_A/I maintains this clamping level across its qualified operating temperature range.
Is P4SMA15AHM3_A/I suitable for automotive applications?
Yes, the P4SMA15AHM3_A/I is AEC-Q101 qualified and explicitly designated for automotive use with the "HM3" suffix indicating halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. It undergoes rigorous stress testing including high-temperature operating life, temperature cycling, and unbiased HAST - meeting requirements for engine control, body electronics, and ADAS subsystems. The P4SMA15AHM3_A/I is not a commercial-grade alternative but a production-qualified automotive component.
What does the "_A/I" suffix mean in P4SMA15AHM3_A/I?
The "_A" denotes the voltage variant (15 V breakdown) and AEC-Q101 qualification level for P4SMA6.8A through P4SMA220A devices; "/I" specifies tape-and-reel packaging in 13-inch diameter reels with 7500 units per reel. This ordering code confirms the P4SMA15AHM3_A/I is supplied in industry-standard automated placement format with full traceability and humidity-sensitive packaging per MSL Level 1 requirements.
How does P4SMA15AHM3_A/I compare to bidirectional TVS diodes like P4SMA15CA?
The P4SMA15AHM3_A/I is unidirectional and intended for DC-biased lines where polarity is fixed (e.g., 12 V supply rails), offering lower leakage and tighter VBR tolerance than bidirectional equivalents. In contrast, P4SMA15CA provides symmetrical clamping for AC or floating signals but exhibits higher reverse leakage above VWM. The P4SMA15AHM3_A/I cannot replace P4SMA15CA in AC-coupled applications without circuit redesign due to polarity dependence and asymmetric conduction behavior.
What is the thermal resistance of P4SMA15AHM3_A/I, and how does it affect PCB layout?
The P4SMA15AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain TJ ≤ 150 °C under 3.3 W steady-state dissipation, designers must ensure adequate copper area and avoid thermal bottlenecks. Reducing pad size increases RθJA, directly limiting safe operating power - the P4SMA15AHM3_A/I's thermal performance is thus layout-dependent and must be verified in final mechanical design.
P4SMA15AHM3_A/I 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:
- 1
- Bidirectional Channels:
- -
- 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)
P4SMA15AHM3_A/I FAQ
1.How can I place an order for P4SMA15AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA15AHM3_A/I 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 P4SMA15AHM3_A/I reliable?
The price and inventory of P4SMA15AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA15AHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA15AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA15AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA15AHM3_A/I?
P4SMA15AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA15AHM3_A/I 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 P4SMA15AHM3_A/I?
For technical support, including P4SMA15AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA15AHM3_A/I requirements.
6.How does Aetrix verify that P4SMA15AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA15AHM3_A/I 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 P4SMA15AHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA15AHM3_A/I?
All P4SMA15AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA15AHM3_A/I, 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 P4SMA15AHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA15AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA15AHM3_A/I Tags
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