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Vishay General Semiconductor - Diodes Division P4SMA12CAHM3/H
- Part No.:
- P4SMA12CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA12CAHM3/H.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,371
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Product details
Overview
P4SMA12CAHM3/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 or power lines. It features a 12 V breakdown voltage (VBR min/max = 11.4–12.6 V at 1 mA), 10.2 V standoff voltage (VWM), 16.7 V maximum 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 control systems.
For engineers reviewing the P4SMA12CAHM3/H datasheet, P4SMA12CAHM3/H pinout, P4SMA12CAHM3/H application, or P4SMA12CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low incremental surge resistance, and compatibility with automated SMT placement on PCBs requiring transient immunity per IEC 61000-4-2/4-4/4-5.
Technical Context
The P4SMA12CAHM3/H operates as a voltage-clamping device that conducts above its breakdown threshold to shunt transient energy away from protected circuitry. Its bidirectional symmetry enables use on AC-coupled or floating signal paths without polarity concerns, and its glass-passivated junction ensures stable leakage performance and fast response time (<1 ns).
Rated for 150 °C maximum junction temperature and MSL Level 1 moisture sensitivity, it supports reflow soldering up to 260 °C peak. The device delivers 400 W peak pulse power (derated to 300 W above 91 V) under 10/1000 µs waveform, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead) - critical for thermal design in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at 1 mA test current - defines precise clamping onset range for reliable overvoltage triggering |
| VWM | 10.2 V - maximum continuous reverse working voltage before leakage exceeds 1 µA, ensuring no false conduction during normal operation |
| VC @ IPPM | 16.7 V at 24.0 A - clamping voltage under full-rated transient, limiting downstream voltage stress to safe levels |
| PPPM | 400 W (10/1000 µs) - peak transient energy absorption capacity, sufficient for IEC 61000-4-5 Level 3 surges |
| IPPM | 24.0 A - maximum non-repetitive surge current the device can safely divert without degradation |
| TJ max | +150 °C - enables operation in under-hood automotive or high-temperature industrial environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking - symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Either terminal accepts surge current; no fixed polarity - simplifies layout on differential or AC lines |
| Cathode | Transient current entry (bidirectional) | Electrically identical to Anode; device functions identically regardless of orientation in circuit |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled, floating, or differential signal paths without polarity constraints |
| 400 W peak pulse power (10/1000 µs) | Supports robust immunity against lightning-induced surges and inductive switching transients in industrial controls |
| AEC-Q101 qualified + halogen-free | Meets automotive reliability standards and environmental compliance requirements for Tier-1 supply chains |
| MSL Level 1, 260 °C reflow compatible | Eliminates pre-baking requirement and supports standard lead-free SMT assembly processes |
| Glass passivated junction | Ensures stable leakage current (<1 µA at VWM) and long-term parameter stability under thermal cycling |
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 ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across signal pair or supply rail to limit transient voltage before it reaches sensitive input stages. Use Value: Prevents latch-up or permanent damage to microcontrollers and ADC front-ends while maintaining signal integrity below 16.7 V during 24 A surges. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers exposed to field wiring transients. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at connector interface to absorb fast-rising surges before they propagate into precision amplifier stages. Use Value: Maintains measurement accuracy by clamping transients within 1 ns, with <1 µA leakage at 10.2 V ensuring minimal offset error in high-impedance circuits. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding Ethernet PHY interfaces and DSL line drivers from induced surges on outdoor cabling in telecom access equipment. IC Role / Device Role / Timing Role: Bidirectional TVS mounted at board edge to shunt common-mode surges between differential pairs and chassis ground. Use Value: Achieves IEC 61000-4-5 Level 3 (1 kV/2 Ω) immunity without adding signal distortion, thanks to symmetric clamping and low capacitance. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines, HVAC blowers, and power tools. IC Role / Device Role / Timing Role: TVS placed across motor terminals or H-bridge outputs to clamp inductive kickback and prevent MOSFET avalanche failure. Use Value: Absorbs 400 W transient energy without derating, enabling smaller heatsinks and higher power density in compact appliance inverters. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA | Same VBR range (11.4–12.6 V), but SMB package (DO-214AA) - larger footprint, 600 W PPPM, higher thermal mass | Better suited for higher-energy surges where PCB space allows; less suitable for ultra-dense layouts | Select SMBJ12CA when surge energy exceeds 400 W or when improved thermal dissipation is required |
| 1.5SMC12CA | Same electrical specs, but SMC (DO-214AB) package - 1.5 kW PPPM, larger body, higher IPPM (100 A) | Targeted at heavy-duty industrial power supplies and UPS systems needing higher single-pulse tolerance | Choose 1.5SMC12CA only if system-level testing confirms need for >400 W clamping capability |
Compared with SMBJ12CA and 1.5SMC12CA, the P4SMA12CAHM3/H offers optimal balance of compact SMA footprint, AEC-Q101 qualification, and 400 W surge handling - making it preferred for space-constrained automotive and industrial modules where reliability and manufacturability are prioritized over extreme energy ratings.
Availability
P4SMA12CAHM3/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, halogen-free compliance, and AEC-Q101 validation.
Supply support for P4SMA12CAHM3/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, TVS devices, and optoelectronics 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 consistent clamping performance, AEC-Q101 qualification, and SMT-ready packaging for demanding production environments.
FAQ
What does the "CA" suffix mean in P4SMA12CAHM3/H?
The "CA" suffix in P4SMA12CAHM3/H indicates a bidirectional Transient Voltage Suppressor - meaning it provides symmetrical clamping in both polarities, with no cathode band marking and identical VBR, VWM, and VC characteristics in either direction. This makes P4SMA12CAHM3/H ideal for protecting AC-coupled signals, differential buses, or floating nodes where polarity cannot be guaranteed.
Is P4SMA12CAHM3/H suitable for automotive applications?
Yes, P4SMA12CAHM3/H is AEC-Q101 qualified and carries the HM3 suffix denoting halogen-free, RoHS-compliant, and automotive-grade construction. It meets stringent requirements for temperature cycling, high-temperature reverse bias, and ESD robustness - making P4SMA12CAHM3/H appropriate for engine control units, ADAS sensors, and body electronics where reliability under harsh conditions is mandatory.
What is the maximum clamping voltage of P4SMA12CAHM3/H under surge conditions?
The maximum clamping voltage (VC) of P4SMA12CAHM3/H is 16.7 V at 24.0 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value represents the upper voltage limit imposed on protected circuitry during worst-case transient events - ensuring downstream components like 12 V-rated microcontrollers or op-amps remain within safe operating limits.
How does the SMA (DO-214AC) package of P4SMA12CAHM3/H compare to SMB or SMC packages?
The SMA package of P4SMA12CAHM3/H measures 4.50 mm × 2.79 mm with a low profile, offering superior board-space efficiency versus SMB (DO-214AA) and SMC (DO-214AB). While SMBJ12CA and 1.5SMC12CA provide higher PPPM, the SMA's 400 W rating, MSL Level 1 rating, and AEC-Q101 qualification make P4SMA12CAHM3/H the preferred choice for high-density, automotive-grade designs where layout area and process compatibility are critical.
Does P4SMA12CAHM3/H require special PCB layout considerations?
Yes - to maintain effective transient suppression, P4SMA12CAHM3/H should be placed as close as possible to the protected port or connector, with short, wide traces to minimize inductance. The recommended pad layout is 5.0 mm × 5.0 mm copper per terminal (per Vishay Doc. 88367), and grounding must be low-impedance. Avoid routing sensitive traces near P4SMA12CAHM3/H's terminals to prevent coupling of clamped surge energy back into the system.
P4SMA12CAHM3/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):
- 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)
P4SMA12CAHM3/H FAQ
1.How can I place an order for P4SMA12CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA12CAHM3/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 P4SMA12CAHM3/H reliable?
The price and inventory of P4SMA12CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA12CAHM3/H is usually 5 days.
3.What payment methods are accepted for P4SMA12CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA12CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA12CAHM3/H?
P4SMA12CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA12CAHM3/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 P4SMA12CAHM3/H?
For technical support, including P4SMA12CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA12CAHM3/H requirements.
6.How does Aetrix verify that P4SMA12CAHM3/H is sourced from the original manufacturer or authorized distributors?
All P4SMA12CAHM3/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 P4SMA12CAHM3/H meets industry standards.
7.What is the process for return or replacement of P4SMA12CAHM3/H?
All P4SMA12CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA12CAHM3/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 P4SMA12CAHM3/H part is unused and in its original packaging.
Return procedure for P4SMA12CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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