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Taiwan Semiconductor Corporation P4SMA9.1CA
- Part No.:
- P4SMA9.1CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1CA.pdf
- Description:
- TVS DIODE 7.78VWM 13.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,767
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Product details
Overview
P4SMA9.1CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 9.1V breakdown voltage (min 8.65V, max 9.55V), 7.78V working stand-off voltage, 13.4V clamping voltage at 31A peak pulse current, and 400W peak pulse power rating under 10/1000μs waveform - deployed in switching mode power supplies and on-board DC/DC converters.
For engineers reviewing the P4SMA9.1CA datasheet, P4SMA9.1CA pinout, P4SMA9.1CA application, or P4SMA9.1CA equivalent, key selection criteria include bidirectional clamping capability, DO-214AC (SMA) package compatibility, low leakage (<50µA at VWM), fast sub-1ps response, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive electronics.
Technical Context
The P4SMA9.1CA implements a glass-passivated silicon junction optimized for unidirectional or bidirectional transient suppression. Its bipolar configuration (denoted by "CA") enables symmetrical clamping in both polarities, eliminating need for polarity-aware placement in AC-coupled or floating systems.
It operates across –55°C to +150°C junction temperature range, supports 40A non-repetitive forward surge current (8.3ms half-sine), and maintains <1µA reverse leakage above 10V - meeting stringent requirements for automotive and industrial power rail protection where reliability under thermal stress and ESD immunity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 8.65V / 9.55V at 1.0mA test current - defines precise voltage threshold where clamping initiates reliably |
| VWM | 7.78V - maximum continuous DC or RMS voltage the device blocks without leakage exceeding 50µA |
| VC @ IPPM | 13.4V at 31A (10/1000μs) - peak clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 400W - surge energy handling capacity under standard 10/1000μs waveform, derated above 25°C ambient |
| IR @ VWM | <50µA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| TJ max | +150°C - enables operation in under-hood automotive or enclosed industrial environments without thermal shutdown |
| Response time | <1.0ps - limits voltage overshoot during ESD or lightning-induced transients before clamping engages |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bi-directional, cathode band not applicable (bidirectional symmetry).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient path | No polarity marking required; either terminal serves as input/output for surge current in either direction |
| Case (body) | Thermal and mechanical interface | DO-214AC molded body provides UL 94V-0 flammability rating and 0.060g mass for reflow compatibility |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5% for A-grade) and long-term reliability under humidity and thermal cycling |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (switching noise) in automotive ECUs |
| Moisture sensitivity level 1 | Zero bake requirement before SMT reflow - compatible with standard J-STD-020 assembly processes |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive - suitable for green manufacturing and export-compliant designs |
Applications
| Switching Mode Power Supply (SMPS) | Automotive On-Board Charger |
|---|---|
Use Scenario: Protection of primary-side MOSFET gate drivers and secondary-side rectifier outputs against flyback spikes and line surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed across DC bus or gate-source nodes to clamp transients below MOSFET VDS or VGS ratings. Use Value: Prevents cumulative degradation of power semiconductors by limiting voltage excursions to ≤13.4V during 31A surges - extending system lifetime in 24V/48V industrial SMPS. | Use Scenario: Input-stage protection for 11kW OBC modules subjected to battery load dump and alternator ripple per ISO 7637-2. IC Role / Device Role / Timing Role: Primary-line TVS connected between HV+ and HV− rails to absorb 400W pulses without failure. Use Value: Maintains <50µA leakage at 7.78V stand-off, minimizing standby current drain while delivering sub-1ps response to protect downstream SiC gate drivers. |
| LED Driver Module | Industrial DC/DC Converter |
Use Scenario: Surge suppression on constant-current LED string inputs exposed to field wiring transients in streetlight or signage applications. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across input terminals to shunt induced surges away from PWM controller ICs. Use Value: Clamps 10/1000μs transients to 13.4V - within safe operating area of 15V-rated LED driver ICs - without affecting steady-state dimming accuracy. | Use Scenario: Input rail protection for isolated 24V-to-5V DC/DC modules used in PLC I/O modules and sensor interfaces. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing repetitive EFT bursts (IEC 61000-4-4) and surge events (IEC 61000-4-5) on primary side. Use Value: Enables compliance with EN 61000-6-2 immunity requirements using single-device solution with DO-214AC footprint - no layout redesign needed for existing SMA pads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0CA (Bourns) | Same DO-214AA package; 9.0V nominal VBR, 13.6V VC @ 29.4A, 600W PPPM | Higher power rating but larger footprint - requires PCB pad revision | Select when higher surge margin is required and board space allows SMB package |
| 1.5KE9.1CA (ON Semiconductor) | Through-hole DO-15 package; identical VBR/VC specs but 1500W PPPM, 100A IPPM | Not surface-mountable - incompatible with automated SMT lines | Select only for legacy through-hole designs or prototyping where reflow is unavailable |
Compared with SMBJ9.0CA and 1.5KE9.1CA, the P4SMA9.1CA delivers optimal balance of 400W surge capability, DO-214AC compactness, and full ISO 7637-2 compliance - making it the preferred choice for space-constrained automotive and industrial SMT assemblies requiring verified bidirectional clamping.
Availability
P4SMA9.1CA is available at Aetrix Electronics and suitable for switching mode power supplies, automotive on-board chargers, and industrial DC/DC converters requiring stable component supply with full traceability and lifecycle management.
Supply support for P4SMA9.1CA 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 Company (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs - headquartered in Hsinchu Science Park, Taiwan.
The P4SMA9.1CA belongs to TSC's P4SMA series of surface-mount TVS diodes engineered specifically for high-reliability automotive and industrial transient suppression - emphasizing AEC-Q101 readiness, moisture resistance, and standardized DO-214AC compatibility.
FAQ
What is the breakdown voltage tolerance for P4SMA9.1CA?
The P4SMA9.1CA has a breakdown voltage range of 8.65V to 9.55V at 1.0mA test current, corresponding to ±5% tolerance (A-grade). This tight VBR window ensures consistent clamping onset across production lots and supports reliable design margining in 9V nominal systems - critical for protecting 12V-tolerant logic and gate drivers without premature conduction.
Is P4SMA9.1CA suitable for automotive applications?
Yes, the P4SMA9.1CA is explicitly validated for automotive use: it meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms, operates from –55°C to +150°C, carries MSL Level 1 rating for zero-bake SMT assembly, and is halogen-free/RoHS compliant. These attributes make P4SMA9.1CA appropriate for engine control units, body electronics, and ADAS power domains where transient immunity is mandated.
How does the "CA" suffix affect P4SMA9.1CA functionality?
"CA" denotes bidirectional configuration: the P4SMA9.1CA contains two opposing avalanche diodes in series, enabling symmetrical clamping for both positive and negative transients. Unlike unidirectional "A" variants, P4SMA9.1CA requires no polarity alignment during placement - simplifying layout and reducing assembly errors in AC-coupled or floating-rail applications such as CAN bus protection or isolated DC/DC feedback paths.
What is the maximum clamping voltage of P4SMA9.1CA under surge conditions?
The P4SMA9.1CA clamps to a maximum of 13.4V at 31A peak pulse current (10/1000μs waveform). This value represents the worst-case voltage imposed on protected circuitry during standardized surge testing - ensuring compatibility with 15V-rated components and providing ≥1.6V design margin below typical 15V logic or gate-drive absolute maximum ratings.
Can P4SMA9.1CA replace P4SMA9.1 in an existing design?
Yes, P4SMA9.1CA can directly replace P4SMA9.1 in most cases: both share identical DO-214AC package, thermal specs, and surge ratings. However, P4SMA9.1 is unidirectional (cathode-marked), while P4SMA9.1CA is bidirectional (no polarity marking). Replacement is safe if the original circuit does not rely on DC polarity - e.g., across AC lines or symmetric rails - but verify absence of DC bias before substitution.
P4SMA9.1CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA9.1CA FAQ
1.How can I place an order for P4SMA9.1CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1CA 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 P4SMA9.1CA reliable?
The price and inventory of P4SMA9.1CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA9.1CA is usually 5 days.
3.What payment methods are accepted for P4SMA9.1CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1CA?
P4SMA9.1CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1CA 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 P4SMA9.1CA?
For technical support, including P4SMA9.1CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1CA requirements.
6.How does Aetrix verify that P4SMA9.1CA is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1CA 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 P4SMA9.1CA meets industry standards.
7.What is the process for return or replacement of P4SMA9.1CA?
All P4SMA9.1CA units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1CA, 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 P4SMA9.1CA part is unused and in its original packaging.
Return procedure for P4SMA9.1CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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