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Taiwan Semiconductor Corporation P4SMA7.5CH
- Part No.:
- P4SMA7.5CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA7.5CH.pdf
- Description:
- 400W, 7.5V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,071
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Product details
Overview
P4SMA7.5CH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for automotive-grade overvoltage protection with 400W peak pulse power rating, 6.75–8.25V breakdown voltage (VBR), and 11.7V clamping voltage (VC) at 35A peak impulse current. It serves as primary surge protection on DC power rails in SMPS and on-board DC/DC converters.
For engineers reviewing the P4SMA7.5CH datasheet, P4SMA7.5CH pinout, P4SMA7.5CH application, or P4SMA7.5CH equivalent, key selection criteria include its AEC-Q101 qualification, 1.0ps fast response time, <1μA reverse leakage at 6.05V working stand-off voltage, and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance for automotive transients.
Technical Context
The P4SMA7.5CH employs a glass-passivated silicon junction optimized for low capacitance and high surge robustness. Its unidirectional configuration provides asymmetric clamping-forward conduction at ≤3.5V and reverse clamping at 11.7V under 10/1000μs waveform-enabling precise rail protection without forward-path interference.
It operates across –55°C to +150°C junction temperature range and is rated for 40A non-repetitive forward surge (8.3ms half-sine), supporting high-energy transient suppression in harsh automotive environments while maintaining <1μA leakage above VWM = 6.05V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=10mA | 6.75–8.25V: Ensures reliable triggering within defined tolerance before clamping begins |
| VWM | 6.05V: Maximum continuous reverse voltage without significant leakage; matches 5V/6V rail systems |
| VC @ IPPM=35A | 11.7V: Clamped voltage during 10/1000μs surge; limits downstream IC stress to safe level |
| PPPM | 400W: Peak pulse power handling per single transient event per JEDEC standard |
| IR @ VWM | <500μA: Low leakage preserves battery life and signal integrity in always-on circuits |
| Response time | <1.0ps: Sub-nanosecond reaction enables protection of high-speed logic and MCU I/O |
| TJ max | +150°C: Supports under-hood and engine-control module placement without derating |
Pinout & Package
DO-214AC (SMA) surface-mount package: 2-terminal, single-die unidirectional TVS with cathode band marking; 0.060g mass; UL 94V-0 molding compound; matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current input / Surge return path | Connected to protected circuit ground or low-side rail; carries full surge current during clamping |
| Cathode | Protected line connection / Clamping node | Connected to power rail (e.g., +5V, +12V); voltage clamps to 11.7V when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD |
| Glass passivated junction | Enhances long-term reliability and moisture resistance vs. epoxy-passivated alternatives |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) |
| Moisture sensitivity level 1 | No floor-life limitation or bake requirement prior to reflow; supports standard SMT assembly |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Infotainment Power Rail | Industrial SMPS Input Stage |
|---|---|
Use Scenario: Protecting USB-C PD controller and display power inputs against load dump and jump-start surges in head unit designs. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12V supply and DC/DC input capacitor to clamp transients before they reach switching regulator. Use Value: Limits voltage excursion to 11.7V during 400W pulses, preventing latch-up or gate oxide damage in synchronous buck controllers. | Use Scenario: Safeguarding AC-DC adapter front-end rectifier output against lightning-induced surges and inductive kickback. IC Role / Device Role / Timing Role: Primary surge shunt device across bulk capacitor, triggered within <1ps to divert energy away from primary-side MOSFET and controller. Use Value: Withstands 35A peak impulse current (10/1000μs), enabling compliance with IEC 61000-4-5 Level 3 (1kV/2kV) without additional crowbar circuitry. |
| LED Driver Module Protection | On-Board DC/DC Converter Input |
Use Scenario: Securing constant-current LED driver ICs in automotive exterior lighting against PWM switching noise and alternator ripple spikes. IC Role / Device Role / Timing Role: Reverse-biased TVS across driver VIN pin to suppress repetitive 100ns–1μs transients generated by nearby solenoid drivers. Use Value: 6.05V working stand-off allows stable operation under nominal 5–6V rail while clamping sub-12V spikes that would otherwise degrade LED driver lifetime. | Use Scenario: Shielding point-of-load (POL) buck converter inputs in ADAS domain controllers from CAN/LIN bus coupling and power rail crosstalk. IC Role / Device Role / Timing Role: Localized TVS at DC/DC enable pin and VIN pad to prevent false triggering or internal LDO overvoltage failure. Use Value: 1.0ps response ensures clamping activation before 3.3V/5V regulator internal protection reacts, reducing risk of brownout or reset instability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0A | DO-214AA package; 7.0V VWM, 10.5V VC @ 34.4A; 600W PPPM | Higher power rating but larger footprint; not AEC-Q101 qualified | Select when higher surge margin is needed and board space permits SMB size |
| 1.5SMC7.0A | DO-214AB package; 7.0V VWM, 10.5V VC @ 34.4A; 1500W PPPM | Substantially higher power rating and thermal mass; through-hole or large SMD footprint | Choose for industrial mains-connected equipment requiring >1kW surge immunity |
Compared with SMBJ7.0A and 1.5SMC7.0A, the P4SMA7.5CH offers tighter VBR tolerance (±8.8%), AEC-Q101 qualification, and DO-214AC footprint compatibility with automated placement-making it optimal for space-constrained, automotive-qualified DC/DC input protection where 400W peak handling suffices.
Availability
P4SMA7.5CH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial switch-mode power supplies, and LED lighting modules requiring stable component supply with AEC-Q101 assurance and lead-free compliance.
Supply support for P4SMA7.5CH 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 power management devices.
The P4SMA series belongs to TSC's AEC-Q101-qualified surface-mount TVS portfolio, engineered specifically for automotive and industrial DC power rail protection where fast response, low leakage, and environmental ruggedness are mandatory.
FAQ
What does the "CH" suffix indicate in P4SMA7.5CH?
The "CH" suffix in P4SMA7.5CH denotes a unidirectional TVS diode with cathode-band polarity marking and compliance with AEC-Q101 automotive qualification standards. It distinguishes this variant from bidirectional versions (e.g., P4SMA7.5CAH) and confirms its use in DC-coupled, polarity-sensitive protection circuits such as 12V automotive power rails. The P4SMA7.5CH is not interchangeable with CAH variants without circuit review.
Is P4SMA7.5CH suitable for protecting a 5V microcontroller I/O line?
No-P4SMA7.5CH is not recommended for direct 5V I/O protection because its 6.05V working stand-off voltage (VWM) exceeds typical 5V logic rail tolerances, risking unintended conduction during normal operation. For 5V I/O, a lower-voltage TVS such as P4SMA5.0A (VWM = 4.1V) is appropriate. The P4SMA7.5CH is intended for higher-voltage rails like 12V or 24V power inputs where its 6.75–8.25V breakdown aligns with system margins.
Does P4SMA7.5CH meet ISO 7637-2 Pulse 5a (load dump) requirements?
No-P4SMA7.5CH meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b, but not Pulse 5a (load dump), which requires clamping capability up to 60V and energy handling beyond 400W. Pulse 5a protection typically demands higher-power TVS arrays or hybrid solutions. The P4SMA7.5CH is rated for 400W peak pulse power and 11.7V clamping, making it suitable for lower-energy transients-not sustained load dump events.
What is the maximum operating temperature for P4SMA7.5CH?
The P4SMA7.5CH has a maximum junction temperature (TJ) of +150°C and an operating ambient temperature range of –55°C to +150°C, fully compliant with AEC-Q101 thermal stress testing. This allows deployment in under-hood automotive modules, industrial motor drives, and high-temperature LED lighting housings without derating, provided PCB copper area and airflow meet TSC's thermal guidelines for DO-214AC packages.
Can P4SMA7.5CH be used in bidirectional signal lines like RS-485?
No-P4SMA7.5CH is unidirectional and lacks symmetrical clamping behavior. For bidirectional data lines such as RS-485, CAN, or USB, a bidirectional TVS like P4SMA7.5CAH must be used instead. Using P4SMA7.5CH on a bidirectional line risks forward conduction during negative signal excursions, causing signal distortion or latch-up. Always verify polarity and directionality before selecting the P4SMA7.5CH for any interface protection role.
P4SMA7.5CH 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):
- 6.05V
- Voltage - Breakdown (Min):
- 6.75V
- Voltage - Clamping (Max) @ Ipp:
- 11.7V
- Current - Peak Pulse (10/1000µs):
- 35A
- 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)
P4SMA7.5CH FAQ
1.How can I place an order for P4SMA7.5CH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA7.5CH 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 P4SMA7.5CH reliable?
The price and inventory of P4SMA7.5CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA7.5CH is usually 5 days.
3.What payment methods are accepted for P4SMA7.5CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA7.5CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA7.5CH?
P4SMA7.5CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA7.5CH 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 P4SMA7.5CH?
For technical support, including P4SMA7.5CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA7.5CH requirements.
6.How does Aetrix verify that P4SMA7.5CH is sourced from the original manufacturer or authorized distributors?
All P4SMA7.5CH 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 P4SMA7.5CH meets industry standards.
7.What is the process for return or replacement of P4SMA7.5CH?
All P4SMA7.5CH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA7.5CH, 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 P4SMA7.5CH part is unused and in its original packaging.
Return procedure for P4SMA7.5CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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