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Taiwan Semiconductor Corporation P4SMA9.1AH
- Part No.:
- P4SMA9.1AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1AH.pdf
- Description:
- 400W, 9.1V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,946
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Product details
Overview
P4SMA9.1AH from Taiwan Semiconductor is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode with a 9.1V nominal breakdown voltage, 7.78V working stand-off voltage, and 13.4V clamping voltage at 31A peak pulse current. It features AEC-Q101 qualification, glass passivated junction, and compliance with ISO 7637-2 for automotive transients - used in DC/DC converters to protect sensitive power rails from ESD and load dump.
For engineers reviewing the P4SMA9.1AH datasheet, P4SMA9.1AH pinout, P4SMA9.1AH application, or P4SMA9.1AH equivalent, key selection criteria include its 1.0mA test current, <50µA reverse leakage at VWM, DO-214AC (SMA) package compatibility, and suitability for automotive-grade surge suppression in compact power systems.
Technical Context
The P4SMA9.1AH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 8.65–9.55V breakdown range at 1.0mA test current. Its fast response time (<1.0ps) enables effective suppression of sub-nanosecond ESD events and fast-rising transients per IEC 61000-4-2 and ISO 7637-2 Pulse 1/2a/2b/3a/3b.
Thermally rated for -55°C to +150°C junction operation and packaged in DO-214AC (SMA), it delivers 400W peak pulse power (10/1000μs waveform) with 13.4V clamping at 31A, ensuring low-voltage rail protection without over-clamping critical ICs like buck controllers or gate drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 8.65V / 9.55V at 1.0mA - defines precise avalanche initiation window for reliable overvoltage triggering |
| VWM | 7.78V - maximum continuous reverse operating voltage before leakage rises significantly |
| IR @ VWM | <50µA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| VC @ IPPM | 13.4V at 31A - limits protected node voltage during 400W transient, safeguarding 12V logic and analog inputs |
| PPPM | 400W (10/1000μs) - sustains automotive load-dump and ISO 7637-2 Pulse 5a energy without failure |
| TJ max | +150°C - supports under-hood and high-power-density PCB placement without derating |
| Package | DO-214AC (SMA) - industry-standard SMD footprint with 0.060g mass and J-STD-002 solderability |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; two-terminal unidirectional configuration. Matte tin-plated leads meet J-STD-002 solderability; polarity indicated by molded cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-side return path; establishes reference for clamping action |
| Cathode | Protected line input | Connected to rail being protected (e.g., 12V input); conducts avalanche current to ground during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements - enables use in engine control, body modules, and ADAS power supplies |
| Glass passivated junction | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives - critical for humid environments |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (capacitive coupling) waveforms |
| Fast response time <1.0ps | Clamps ESD events before propagation into downstream ICs - protects USB, CAN, and sensor interfaces |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement before reflow - simplifies SMT manufacturing and inventory management |
Applications
| Automotive DC/DC Converters | Industrial SMPS Inputs |
|---|---|
Use Scenario: Protecting 12V-to-3.3V buck converter input against load dump and alternator transients in vehicle infotainment systems. IC Role / Device Role: Unidirectional TVS placed between input rail and ground to clamp surges before they reach controller IC and MOSFETs. Use Value: Limits peak voltage to 13.4V, preventing overvoltage damage to 16V-rated input capacitors and 20V-max controllers. | Use Scenario: Safeguarding AC-DC adapter output stage from back-EMF and hot-swap transients in factory automation PLCs. IC Role / Device Role: Standoff protection on secondary-side 24V rail, absorbing repetitive 400W pulses without degradation. Use Value: Maintains <50µA leakage at 7.78V, avoiding false triggering and preserving efficiency in always-on monitoring circuits. |
| LED Driver Power Rails | On-Board Telematics Modules |
Use Scenario: Suppressing inductive kickback from LED string switching in automotive exterior lighting. IC Role / Device Role: Parallel-connected TVS across high-side driver output to absorb flyback energy during PWM turn-off. Use Value: 13.4V clamping ensures LED driver ICs with 16V absolute max ratings remain within safe operating area. | Use Scenario: Securing CAN-FD and GNSS receiver power inputs against ESD and conducted noise in connected car telematics units. IC Role / Device Role: First-line transient protection on 5V/3.3V supply nets upstream of LDOs and PMICs. Use Value: Sub-1ps response captures ESD events before they couple into sensitive RF front-ends or microcontroller I/O. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ9.0A | 600W rating, same DO-214AA package, 9.0V VBR min/max = 8.55–9.45V, 14.4V VC @ 41.7A | Higher power handling but larger clamping voltage - less suitable for tight 12V rail margins | Select when higher surge margin is required and board space allows SMB footprint |
| 1.5SMC9.0A | 1500W rating, DO-214AB package, 9.0V VBR min/max = 8.55–9.45V, 14.4V VC @ 104A | Designed for bulkier industrial surge protection - over-specified for automotive PCB space constraints | Choose only for non-automotive applications requiring multi-kA surge immunity |
Compared with P4SMA9.1AH, SMBJ9.0A offers higher peak power but increases clamping voltage by 1.0V, while 1.5SMC9.0A sacrifices miniaturization for extreme surge capacity - making P4SMA9.1AH optimal for space-constrained, AEC-Q101-compliant 12V rail protection.
Availability
P4SMA9.1AH is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS inputs, and LED driver power rails requiring stable component supply with full traceability and lifecycle support.
Supply support for P4SMA9.1AH 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The P4SMA9.1AH belongs to TSC's AEC-Q101-qualified P4SMAx(A)H series - engineered specifically for robust, surface-mount transient suppression in automotive power systems and harsh-environment electronics.
FAQ
What is the breakdown voltage range of the P4SMA9.1AH?
The P4SMA9.1AH has a guaranteed breakdown voltage range of 8.65V to 9.55V at 1.0mA test current, measured per ANSI/IEEE C62.35 standards. This narrow VBR window ensures consistent triggering behavior across production lots and temperature extremes, directly supporting design margin calculations for 12V system protection in the P4SMA9.1AH.
Is the P4SMA9.1AH suitable for bidirectional transient suppression?
No - the P4SMA9.1AH is a unidirectional TVS diode, intended for DC rail protection with defined anode-cathode polarity. For bidirectional applications such as AC lines or data bus protection, Taiwan Semiconductor specifies the P4SMA9.1CAH variant; using P4SMA9.1AH in reverse-biased configurations may result in premature failure or undefined clamping behavior.
Does the P4SMA9.1AH meet automotive qualification standards?
Yes - the P4SMA9.1AH is explicitly AEC-Q101 qualified and tested per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms. Its DO-214AC (SMA) package meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1, confirming suitability for automotive production environments and under-hood deployment in the P4SMA9.1AH.
What is the maximum clamping voltage of the P4SMA9.1AH under surge conditions?
The P4SMA9.1AH clamps to a maximum of 13.4V at 31A peak pulse current (10/1000μs waveform), as specified in Taiwan Semiconductor's official datasheet revision A2102. This value defines the upper voltage limit imposed on protected circuitry during worst-case transients, making it critical for verifying compatibility with downstream ICs' absolute maximum ratings in designs using the P4SMA9.1AH.
Can the P4SMA9.1AH be used in automated SMT assembly processes?
Yes - the P4SMA9.1AH is optimized for automated placement with its DO-214AC (SMA) package, matte tin-plated leads compliant with J-STD-002 solderability, and moisture sensitivity level 1 rating. These features eliminate bake requirements and ensure consistent reflow yield, enabling high-volume, no-fail SMT integration for the P4SMA9.1AH in automotive and industrial PCB assembly lines.
P4SMA9.1AH 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:
- 1
- Bidirectional Channels:
- -
- 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)
P4SMA9.1AH FAQ
1.How can I place an order for P4SMA9.1AH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1AH 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 P4SMA9.1AH reliable?
The price and inventory of P4SMA9.1AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA9.1AH is usually 5 days.
3.What payment methods are accepted for P4SMA9.1AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1AH?
P4SMA9.1AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1AH 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 P4SMA9.1AH?
For technical support, including P4SMA9.1AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1AH requirements.
6.How does Aetrix verify that P4SMA9.1AH is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1AH 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 P4SMA9.1AH meets industry standards.
7.What is the process for return or replacement of P4SMA9.1AH?
All P4SMA9.1AH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1AH, 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 P4SMA9.1AH part is unused and in its original packaging.
Return procedure for P4SMA9.1AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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