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Taiwan Semiconductor Corporation P4SMA9.1CH
- Part No.:
- P4SMA9.1CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA9.1CH.pdf
- Description:
- 400W, 9.1V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,232
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Product details
Overview
P4SMA9.1CH from Taiwan Semiconductor is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode with a 9.1V breakdown voltage, 7.37V working stand-off voltage, and 13.8V clamping voltage at 30A peak pulse current. It provides automotive-grade surge protection in DC/DC converters and power adapters.
For engineers reviewing the P4SMA9.1CH datasheet, P4SMA9.1CH pinout, P4SMA9.1CH application, or P4SMA9.1CH equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, AEC-Q101 qualification, DO-214AC package compatibility, and leakage current ≤50µA at VWM.
Technical Context
The P4SMA9.1CH uses a glass-passivated silicon junction to achieve fast response time (<1.0ps) and stable breakdown behavior across -55°C to +150°C operating junction temperature. Its unidirectional configuration enables polarity-sensitive clamping on positive-going transients only.
Designed for single-die operation in DO-214AC (SMA) package, it delivers 400W peak pulse power per 10/1000μs waveform with <3.5V forward voltage at 25A surge current and meets JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 8.19V / 10.00V at 1.0mA test current - defines guaranteed breakdown threshold range for reliable overvoltage triggering |
| VWM | 7.37V - maximum continuous reverse voltage before significant leakage begins; sets safe operating margin below breakdown |
| IPPM | 30.0A at 10/1000μs waveform - peak surge current handling capacity determining clamping robustness |
| VC@IPPM | 13.8V - clamped voltage during 30A transient, directly limiting downstream component stress |
| IR@VWM | ≤50µA - low leakage ensures minimal power loss and signal integrity in standby or low-power states |
| TJ max | +150°C - high junction temperature rating supports operation in thermally constrained automotive and industrial enclosures |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-ended unidirectional configuration with cathode band marking. Matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path | Connected to ground or low-impedance reference; completes clamping loop during positive surges |
| Cathode | Protected line input | Connected to protected circuit node; blocks reverse current until breakdown threshold exceeded |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use including engine control, body electronics, and infotainment systems |
| Glass passivated junction | Ensures long-term stability of VBR and low parameter drift under thermal cycling and humidity exposure |
| Clamping ratio VC/VBR | 1.35–1.69 (13.8V / 8.19–10.00V) - tight ratio minimizes overvoltage overshoot during fast transients |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
Applications
| Switching Mode Power Supply (SMPS) | Automotive On-Board DC/DC Converter |
|---|---|
Use Scenario: Protection of primary-side controller ICs and secondary-side rectifiers against switching noise and load dump spikes. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input bus or output rail to clamp positive transients before they reach sensitive regulation circuitry. Use Value: Limits voltage excursion to ≤13.8V during 30A surges, preventing latch-up or gate oxide damage in MOSFET drivers and PWM controllers. | Use Scenario: Safeguarding 12V-to-3.3V/5V buck converters powering ADAS sensors and microcontrollers in vehicle domains. IC Role / Device Role / Timing Role: Input-side transient suppressor absorbing ISO 7637-2 Pulse 1 (−100V/50Ω) and Pulse 2b (−100V/2Ω) events. Use Value: Enables AEC-Q101-compliant design without external crowbar circuits or complex filtering, reducing BOM count and board area. |
| Industrial LED Driver | USB-C Power Adapter Input Stage |
Use Scenario: Protecting constant-current LED driver ICs from inductive kickback generated by magnetic dimming circuits and relay switching. IC Role / Device Role / Timing Role: Parallel-connected TVS across driver input terminals to shunt energy from 400W peak pulses into ground. Use Value: Maintains VWM = 7.37V margin below typical 9–12V LED bus voltages while delivering sub-1ps response to preserve timing-critical dimming signals. | Use Scenario: Front-end surge suppression in universal-input AC/DC adapters supporting USB PD 3.0 up to 100W. IC Role / Device Role / Timing Role: Primary-side clamping device on bulk capacitor input to absorb differential-mode surges from mains transients and ESD events. Use Value: Achieves 400W peak power rating with DO-214AC footprint-enabling compact, automated assembly without sacrificing IEC 61000-4-5 Level 4 immunity. |
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, 9.0V VBR, DO-214AA (SMB) package - larger footprint, higher power but same voltage grade | Preferred where higher surge margin is required and PCB space allows SMB outline | Select SMBJ9.0A when system-level testing requires >400W pulse handling or longer lifetime under repetitive surges |
| 1.5SMC9.0A | 1500W rating, 9.0V VBR, DO-214AB (SMC) package - significantly larger, higher IPPM (167A) | Suitable for industrial motor drives or telecom power supplies with extreme surge exposure | Choose 1.5SMC9.0A only if layout permits SMC footprint and application demands >1kW transient capability |
Compared with SMBJ9.0A and 1.5SMC9.0A, the P4SMA9.1CH offers optimal balance of AEC-Q101 compliance, DO-214AC compactness, and 400W surge rating-making it ideal for space-constrained automotive and portable power designs where precise 9.1V clamping and automated placement are critical.
Availability
P4SMA9.1CH is available at Aetrix Electronics and suitable for automotive electronics, industrial LED drivers, and USB-C power adapter designs requiring stable component supply and AEC-Q101 assurance.
Supply support for P4SMA9.1CH 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, and power devices.
The P4SMA9.1CH belongs to TSC's AEC-Q101-qualified P4SMAxH series, engineered specifically for automotive and industrial transient suppression where reliability, low leakage, and fast clamping response are mandatory.
FAQ
What is the polarity configuration of the P4SMA9.1CH?
The P4SMA9.1CH is a unidirectional TVS diode, meaning it conducts only during positive voltage transients applied to its cathode terminal. Its DO-214AC package features a visible cathode band for correct orientation during automated placement. This configuration ensures no conduction under normal reverse-biased operation, preserving low leakage and enabling use in DC-biased lines such as automotive 12V rails.
Does the P4SMA9.1CH meet automotive qualification standards?
Yes, the P4SMA9.1CH is AEC-Q101 qualified and tested per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms. It operates across –55°C to +150°C junction temperature and passes JESD201 Class 2 whisker testing, making it suitable for under-hood and cabin-mounted automotive modules where environmental robustness is essential.
What is the clamping voltage of the P4SMA9.1CH at rated surge current?
The P4SMA9.1CH has a maximum clamping voltage (VC) of 13.8V at 30.0A peak pulse current (10/1000μs waveform). This value is measured under standardized surge conditions and represents the upper voltage limit imposed on protected circuitry during worst-case transient events, ensuring downstream components remain within safe operating limits.
How does the P4SMA9.1CH compare to bidirectional variants like P4SMA9.1AH?
The P4SMA9.1CH differs from the bidirectional P4SMA9.1AH in polarity: CH is unidirectional (cathode-anode), while AH clamps both polarities. The P4SMA9.1CH exhibits lower leakage (≤50µA vs. ≤1µA for AH at VWM) and tighter VBR tolerance (8.19–10.00V vs. 8.65–9.55V), making it preferable for DC-biased applications where reverse conduction must be avoided.
Is the P4SMA9.1CH compatible with lead-free reflow processes?
Yes, the P4SMA9.1CH uses matte tin-plated leads compliant with J-STD-002 solderability requirements and supports standard lead-free reflow profiles up to 260°C peak temperature. Its DO-214AC molding compound meets UL 94V-0 flammability rating and moisture sensitivity level (MSL) 1 per J-STD-020, eliminating bake requirements prior to assembly.
P4SMA9.1CH 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):
- 7.37V
- Voltage - Breakdown (Min):
- 8.19V
- Voltage - Clamping (Max) @ Ipp:
- 13.8V
- Current - Peak Pulse (10/1000µs):
- 30A
- 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)
P4SMA9.1CH FAQ
1.How can I place an order for P4SMA9.1CH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA9.1CH 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 P4SMA9.1CH reliable?
The price and inventory of P4SMA9.1CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA9.1CH is usually 5 days.
3.What payment methods are accepted for P4SMA9.1CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA9.1CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA9.1CH?
P4SMA9.1CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA9.1CH 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 P4SMA9.1CH?
For technical support, including P4SMA9.1CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA9.1CH requirements.
6.How does Aetrix verify that P4SMA9.1CH is sourced from the original manufacturer or authorized distributors?
All P4SMA9.1CH 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 P4SMA9.1CH meets industry standards.
7.What is the process for return or replacement of P4SMA9.1CH?
All P4SMA9.1CH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA9.1CH, 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 P4SMA9.1CH part is unused and in its original packaging.
Return procedure for P4SMA9.1CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA9.1CH Tags
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