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Taiwan Semiconductor Corporation P4SMA9.1CAH
- Part No.:
- P4SMA9.1CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1CAH.pdf
- Description:
- 400W, 9.1V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,900
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Product details
Overview
P4SMA9.1CAH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 9.1V nominal breakdown voltage (8.65–9.55V), and 13.4V maximum clamping voltage at 31A peak impulse current. It protects automotive-grade DC/DC converters against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P4SMA9.1CAH datasheet, P4SMA9.1CAH pinout, P4SMA9.1CAH application, or P4SMA9.1CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, sub-1ps response time, <1μA leakage at 7.78V working stand-off voltage, and compliance with J-STD-020 moisture sensitivity level 1.
Technical Context
The P4SMA9.1CAH employs a glass-passivated silicon junction optimized for fast transient suppression in bidirectional signal and power lines. Its electrical characteristics-breakdown voltage (VBR = 8.65–9.55V @ IT = 1mA), clamping voltage (VC = 13.4V @ IPPM = 31A), and low leakage (<1μA @ VWM = 7.78V)-are symmetric in both polarities due to its bipolar construction.
It operates across –55°C to +150°C junction temperature range and meets ISO 7637-2 immunity requirements for automotive electronics. The device uses a single-die DO-214AC (SMA) package with matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 8.65V / 9.55V @ IT = 1mA - defines reliable conduction onset under reverse/forward surge |
| VWM | 7.78V - maximum continuous reverse/forward voltage before significant leakage begins |
| VC @ IPPM | 13.4V @ 31A, 10/1000μs - peak clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 400W - peak transient energy absorption capacity without failure |
| IR @ VWM | <1μA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| Response time | <1.0ps - enables suppression of nanosecond-scale ESD and fast switching noise |
| TJ range | –55°C to +150°C - supports under-hood and powertrain applications without derating |
Pinout & Package
DO-214AC (SMA) surface-mount package: molded epoxy case meeting UL 94V-0, cathode band marking for polarity identification (bidirectional operation eliminates functional polarity dependence), 0.060g mass, and RoHS/halogen-free compliance per IEC 61249-2-21.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (marked band) | Bidirectional transient terminal | Identical clamping behavior in both directions; band denotes conventional cathode orientation but does not restrict mounting orientation |
| Case (exposed lead frame) | Thermal and mechanical interface | Provides primary heat path to PCB copper; requires adequate thermal pad area per manufacturer's suggested layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock per stress test plan |
| Glass passivated junction | Enhances long-term reliability and stability of VBR under repeated surge events and high-humidity environments |
| ISO 7637-2 compliance | Guarantees robust protection against real-world automotive load dump and inductive switch-off transients (Pulse 1/2a/2b/3a/3b) |
| J-STD-020 Level 1 MSL | Enables standard SMT reflow without baking or special handling-reduces manufacturing cost and risk |
| Matte tin-plated leads | Ensures consistent solder wetting and joint strength per J-STD-002, eliminating post-reflow voiding or dewetting issues |
Applications
| Automotive On-Board DC/DC Converter | Industrial SMPS Input Stage |
|---|---|
Use Scenario: Protects 12V-to-5V/3.3V buck converter inputs in vehicle infotainment ECUs exposed to battery line transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input terminals to clamp ISO 7637-2 Pulse 2b (load dump) and Pulse 3b (switching noise). Use Value: Limits voltage excursion to ≤13.4V during 31A surges, preventing damage to upstream MOSFETs and controller ICs while maintaining AEC-Q101 compliance. | Use Scenario: Shields AC-DC adapter secondary-side outputs feeding sensitive logic rails in factory automation controllers. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing repetitive 400W surges from relay contact bounce or transformer leakage spikes. Use Value: Maintains <1μA leakage at 7.78V, avoiding false triggering or loading of feedback networks in precision regulation loops. |
| LED Driver Power Input | Automotive Lighting Module |
Use Scenario: Safeguards constant-current LED driver ICs in outdoor signage against induced lightning surges on long supply runs. IC Role / Device Role / Timing Role: Fast-response (sub-1ps) bidirectional clamp placed between input capacitor and driver IC power pins. Use Value: Clamps 10/1000μs transients to 13.4V before driver overvoltage lockout activates, preserving system uptime and reducing field failures. | Use Scenario: Integrated into headlamp control modules where CAN bus and power lines share harnesses subject to coupled transients. IC Role / Device Role / Timing Role: Dual-role protector for both power rail (bidirectional clamping) and low-voltage signal lines via shared ground reference. Use Value: Eliminates need for separate unidirectional and bidirectional devices-reduces BOM count and PCB area in space-constrained lamp housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA | 600W rating, SMB package (larger footprint), VBR = 10.0–11.1V, VC = 14.4V @ 41.7A | Higher power margin but requires PCB redesign; less suitable for ultra-compact automotive modules | Select when higher surge margin is required and board space permits larger SMB footprint |
| 1.5SMC9.0CA | 1500W rating, SMC package (3.9mm × 2.5mm), VBR = 9.5–10.5V, VC = 15.4V @ 97.4A | Over-specified for 400W needs; significantly larger size and higher clamping voltage reduce system-level protection efficiency | Choose only for legacy designs using SMC footprints or where multi-kW surge immunity is mandated |
Compared with SMBJ9.0CA and 1.5SMC9.0CA, the P4SMA9.1CAH delivers optimal balance of AEC-Q101 compliance, compact DO-214AC footprint, and precise 9.1V standoff-making it preferred for space-constrained, automotive-qualified DC/DC and lighting modules where leakage, response time, and thermal profile are critical.
Availability
P4SMA9.1CAH is available at Aetrix Electronics and suitable for automotive on-board DC/DC converters, industrial switching mode power supplies, and LED driver power inputs requiring stable component supply with full traceability and lifecycle management.
Supply support for P4SMA9.1CAH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and automotive-qualified components.
The P4SMA9.1CAH belongs to TSC's AEC-Q101-qualified P4SMAx(A)H series-designed specifically for robust transient suppression in automotive power systems, industrial SMPS, and lighting applications where reliability under harsh thermal and electrical stress is mandatory.
FAQ
What is the exact breakdown voltage range for P4SMA9.1CAH?
The P4SMA9.1CAH has a guaranteed breakdown voltage range of 8.65V to 9.55V measured at 1mA test current (VBR @ IT = 1mA), per the manufacturer's Electrical Specifications table. This tight tolerance ensures predictable turn-on behavior in bidirectional clamping applications such as automotive DC/DC converter inputs where precise voltage limiting is required.
Is P4SMA9.1CAH suitable for automotive applications?
Yes, the P4SMA9.1CAH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity standards. Its –55°C to +150°C operating junction temperature range, glass-passivated junction, and J-STD-020 Level 1 moisture sensitivity rating make it fully suitable for under-hood and powertrain electronics where the P4SMA9.1CAH provides certified surge protection.
What does the "CAH" suffix indicate in P4SMA9.1CAH?
The "CAH" suffix in P4SMA9.1CAH denotes a bidirectional configuration with tightened breakdown voltage tolerance (±5% typical) and AEC-Q101 qualification. Unlike "H"-suffix unidirectional variants, the "CAH" version supports symmetrical clamping in both polarities-critical for protecting differential buses or floating power rails where polarity reversal may occur, as confirmed in the device's Electrical Specifications and Applications sections.
What is the maximum clamping voltage of P4SMA9.1CAH during a 10/1000μs surge?
The P4SMA9.1CAH exhibits a maximum clamping voltage (VC) of 13.4V when subjected to its rated 31A peak impulse current (IPPM) under the standardized 10/1000μs double-exponential waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry sees no more than 13.4V during worst-case transient events, directly protecting 5V and 3.3V logic interfaces in automotive modules using the P4SMA9.1CAH.
Does P4SMA9.1CAH require special PCB layout considerations?
Yes-the P4SMA9.1CAH requires adherence to Taiwan Semiconductor's suggested pad layout for DO-214AC (SMA) to ensure thermal performance and mechanical reliability. Key requirements include minimum 1.5mm² copper pour per pad, 0.5mm solder mask dam, and avoidance of thermal relief on high-current paths. These guidelines prevent solder joint cracking and excessive junction temperature rise during repeated 400W surges, ensuring long-term functionality of the P4SMA9.1CAH in production systems.
P4SMA9.1CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.78V
- Voltage - Breakdown (Min):
- 8.65V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 31A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA9.1CAH FAQ
1.How can I place an order for P4SMA9.1CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1CAH 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 P4SMA9.1CAH reliable?
The price and inventory of P4SMA9.1CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA9.1CAH is usually 5 days.
3.What payment methods are accepted for P4SMA9.1CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1CAH?
P4SMA9.1CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1CAH 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 P4SMA9.1CAH?
For technical support, including P4SMA9.1CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1CAH requirements.
6.How does Aetrix verify that P4SMA9.1CAH is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1CAH 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 P4SMA9.1CAH meets industry standards.
7.What is the process for return or replacement of P4SMA9.1CAH?
All P4SMA9.1CAH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1CAH, 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 P4SMA9.1CAH part is unused and in its original packaging.
Return procedure for P4SMA9.1CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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