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Vishay General Semiconductor - Diodes Division P4SMA12AHM3/I
- Part No.:
- P4SMA12AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA12AHM3/I.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,677
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Product details
Overview
P4SMA12AHM3/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 a 12 V breakdown voltage (VBR = 11.4–12.6 V at 1 mA), 10.2 V maximum standoff voltage (VWM), 16.7 V clamping voltage (VC) at 24.0 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial power supplies.
For engineers reviewing the P4SMA12AHM3/I datasheet, P4SMA12AHM3/I pinout, P4SMA12AHM3/I application, or P4SMA12AHM3/I equivalent, this device is selected for robust ESD and surge protection where low-profile SMT placement, AEC-Q101 qualification, halogen-free RoHS compliance, and stable clamping under repetitive transients are required.
Technical Context
The P4SMA12AHM3/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 (<1.0 µA at VWM), while MSL Level 1 moisture sensitivity supports lead-free reflow up to 260 °C.
It delivers 400 W peak pulse power (derated to 300 W above 91 V) with fast response time (<1 ns) and low dynamic impedance, enabling effective suppression of inductive switching spikes and lightning-induced surges on DC rails and low-speed data lines in harsh environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at 1 mA - defines precise avalanche initiation window for predictable clamping onset |
| VWM | 10.2 V - maximum continuous reverse operating voltage before leakage rises significantly |
| VC @ IPPM | 16.7 V at 24.0 A - clamped voltage during 10/1000 µs surge, limiting downstream stress |
| PPPM | 400 W - peak transient energy absorption capability under standard surge waveform |
| IFSM | 40 A - single half-sine surge current rating (8.3 ms), supporting inrush and fault-current events |
| TJ max | +150 °C - enables operation in under-hood automotive and high-ambient industrial environments |
| Package | SMA (DO-214AC) - industry-standard 2-pin SMT outline with 5.0 mm × 5.0 mm copper pad thermal design |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, molded plastic case with matte tin-plated leads; cathode indicated by band on one end; compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 12 V rail or sensor input); band-marked end |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards |
| Halogen-free & RoHS-compliant | Meets environmental requirements for modern automotive and industrial electronics without compromising thermal performance |
| 400 W peak pulse power | Handles high-energy transients common in 12 V vehicle systems and industrial PLC I/O modules |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising surges, improving protection margin for sensitive ICs |
| MSL Level 1 | Allows standard SMT reflow without baking; compatible with high-volume automated assembly |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Suppressing load-dump and jump-start transients on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges above 13.5 V. Use Value: Limits rail voltage to ≤16.7 V during 24.0 A transient, preventing damage to 16 V-rated regulators and microcontrollers. |
Use Scenario: Protecting analog outputs (e.g., 4–20 mA current loops) and digital I/O of pressure/temperature sensors in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting induced surges on sensor interface lines to ground. Use Value: Clamps ESD and inductive kickback within 1 ns, preserving signal integrity without loading the 100 kΩ sensor output impedance. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feeding Protection |
Use Scenario: Safeguarding AC/DC adapter primary-side controllers and secondary-side rectifiers against line surges. IC Role / Device Role / Timing Role: Mounted across bulk capacitor or input rectifier output to absorb differential-mode transients. Use Value: Withstands 400 W pulses without degradation, extending adapter lifetime in regions with unstable grid voltage. |
Use Scenario: Protecting PoE-powered devices (e.g., IP cameras) from surges entering via 48 V DC feed lines. IC Role / Device Role / Timing Role: Unidirectional TVS on DC input rail upstream of DC/DC converter input filter. Use Value: Maintains <1.0 µA leakage at 10.2 V, ensuring minimal standby power loss while clamping to 16.7 V during surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12AHE3/A | Same VBR range (11.4–12.6 V), identical SMA package, but rated for 400 W with 8.3 ms surge rating only (not 10/1000 µs) | Limited to shorter-duration surges; less suitable for lighting-induced transients | Select when surge profile is dominated by capacitor discharge rather than inductive switching |
| 1.5SMC12AH | Higher package thermal mass (SMC/DO-214AB), 1500 W peak power, but larger footprint and 1.5× higher VC (19.9 V) | Used where PCB space allows and higher energy handling is mandatory (e.g., motor drive inputs) | Choose for legacy designs requiring drop-in upgrade of energy rating without changing circuit topology |
Compared with SMAJ12AHE3/A and 1.5SMC12AH, the P4SMA12AHM3/I offers optimal balance of compact SMA footprint, AEC-Q101 qualification, halogen-free compliance, and verified 10/1000 µs surge performance - making it preferred for new automotive and industrial SMT designs where board area and regulatory alignment are critical.
Availability
P4SMA12AHM3/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, consumer power adapters, and telecom DC feeding circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for P4SMA12AHM3/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P4SMA Series belongs to Vishay's TRANSZORB® TVS portfolio, engineered for high-reliability transient suppression in automotive, industrial, and communications systems where consistent clamping, low leakage, and AEC-Q101 validation are mandatory.
FAQ
What is the breakdown voltage tolerance of P4SMA12AHM3/I?
The P4SMA12AHM3/I has a breakdown voltage VBR specified at 11.4 V minimum and 12.6 V maximum when tested at 1 mA, yielding a ±5% tolerance. This tight spread ensures consistent clamping behavior across production lots and supports reliable overvoltage protection design margins in 12 V systems where the P4SMA12AHM3/I is commonly deployed.
Is P4SMA12AHM3/I suitable for automotive applications?
Yes, the P4SMA12AHM3/I carries AEC-Q101 qualification and uses the HM3 suffix denoting halogen-free, RoHS-compliant, and automotive-grade construction. It is explicitly rated for operation from –65 °C to +150 °C junction temperature and validated for mechanical shock, temperature cycling, and humidity testing - making P4SMA12AHM3/I appropriate for under-hood and cabin ECU protection.
What is the clamping voltage of P4SMA12AHM3/I at its rated peak pulse current?
The P4SMA12AHM3/I exhibits a maximum clamping voltage VC of 16.7 V when subjected to its rated peak pulse current IPPM of 24.0 A under the standardized 10/1000 µs waveform. This value is measured with the device mounted on 5.0 mm × 5.0 mm copper pads per JEDEC guidelines and defines the upper voltage limit imposed on protected circuitry during surge events.
Does P4SMA12AHM3/I have bidirectional capability?
No, P4SMA12AHM3/I is a unidirectional TVS diode, as indicated by the "A" suffix and absence of "CA" in the part number. It conducts only in reverse bias above VBR; polarity is marked by a cathode band. For bidirectional protection, Vishay offers P4SMA12CA variants - the P4SMA12AHM3/I must be oriented correctly in-circuit with cathode toward the protected line.
What packaging format does P4SMA12AHM3/I ship in?
The P4SMA12AHM3/I ships in 13-inch diameter plastic tape and reel (I-type packaging), with 7500 units per reel. This format supports high-speed pick-and-place assembly and aligns with IPC-7351 land pattern recommendations for SMA (DO-214AC) devices. The "I" suffix in the part number explicitly denotes this reel size and delivery mode.
P4SMA12AHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 24A
- 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)
P4SMA12AHM3/I FAQ
1.How can I place an order for P4SMA12AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA12AHM3/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 P4SMA12AHM3/I reliable?
The price and inventory of P4SMA12AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA12AHM3/I is usually 5 days.
3.What payment methods are accepted for P4SMA12AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA12AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA12AHM3/I?
P4SMA12AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA12AHM3/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 P4SMA12AHM3/I?
For technical support, including P4SMA12AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA12AHM3/I requirements.
6.How does Aetrix verify that P4SMA12AHM3/I is sourced from the original manufacturer or authorized distributors?
All P4SMA12AHM3/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 P4SMA12AHM3/I meets industry standards.
7.What is the process for return or replacement of P4SMA12AHM3/I?
All P4SMA12AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA12AHM3/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 P4SMA12AHM3/I part is unused and in its original packaging.
Return procedure for P4SMA12AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA12AHM3/I Tags
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