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Taiwan Semiconductor Corporation P4SMA7.5A
- Part No.:
- P4SMA7.5A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA7.5A.pdf
- Description:
- TVS DIODE 6.4VWM 11.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,407
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Product details
Overview
P4SMA7.5A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for overvoltage protection of DC power rails and signal lines. It features a 7.13–7.88 V breakdown voltage at 10 mA, 6.40 V working stand-off voltage, 11.3 V clamping voltage at 37 A peak pulse current, and 400 W peak pulse power rating under 10/1000 µs waveform.
For engineers reviewing the P4SMA7.5A datasheet, P4SMA7.5A pinout, P4SMA7.5A application, or P4SMA7.5A equivalent, key selection criteria include clamping performance at 37 A, low leakage (<500 µA at 6.40 V), ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and suitability for SMPS input/output protection where fast response (<1.0 ps) and glass-passivated junction reliability are required.
Technical Context
The P4SMA7.5A operates as a unidirectional avalanche diode, leveraging a glass-passivated silicon junction to achieve stable reverse breakdown and low capacitance. Its clamping behavior is defined by a 10/1000 µs double-exponential surge waveform, with thermal derating above 25°C per Fig.2 and non-repetitive peak power limited to 400 W at TA = 25°C.
It supports automated SMT placement and meets JESD201 Class 2 whisker resistance, UL 94V-0 molding compound flammability, and moisture sensitivity level 1 per J-STD-020. Polarity is marked by a cathode band, and terminal plating is matte tin per J-STD-002 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 7.13 V / 7.88 V at 10 mA - defines guaranteed avalanche initiation range for reliable overvoltage triggering |
| VWM | 6.40 V - maximum continuous reverse operating voltage before significant leakage begins |
| IR @ VWM | <500 µA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| VC @ IPPM | 11.3 V at 37 A - clamping voltage during 10/1000 µs surge, limiting protected circuit stress |
| PPPM | 400 W - peak pulse power handling capability, enabling robust protection against automotive load dump and ESD transients |
| TJ max | +150 °C - junction temperature limit supporting operation in enclosed power supply environments |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with 7,500 pcs/reel tape-and-reel packaging |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with axial leads bent into gull-wing configuration; cathode indicated by band-marked end; compliant with JEDEC DO-214AC mechanical dimensions and IPC-7351B land pattern recommendations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side (e.g., GND or return rail) in unidirectional TVS configuration |
| Cathode | Avalanche clamping node | Connected to protected line (e.g., +12 V rail); conducts surge current to ground when VIN exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| Clamping time <1.0 ps | Enables suppression of ultrafast ESD events (IEC 61000-4-2) before downstream IC damage occurs |
| ISO 7637-2 compliance | Validated for automotive electrical system transients including Pulse 1 (inductive load disconnect), Pulse 2a/2b (load dump), and Pulse 3a/3b (switching noise) |
| Moisture sensitivity level 1 | Eliminates bake requirements prior to reflow, reducing manufacturing cost and process complexity |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained applications |
Applications
| Switching Mode Power Supply (SMPS) Input Protection | USB Port ESD Protection |
|---|---|
Use Scenario: Protects AC-DC adapter primary-side rectifier output and secondary-side DC bus from line surges and coupling transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between DC rail and ground to clamp overvoltage spikes before they reach PWM controller or output capacitor. Use Value: Limits peak rail voltage to ≤11.3 V during 37 A 10/1000 µs surge, preventing MOSFET gate oxide rupture and electrolytic capacitor overvoltage failure. |
Use Scenario: Shields USB 2.0 data lines and VBUS rail from human-body-model (HBM) ESD and cable discharge events. IC Role / Device Role / Timing Role: Standoff-rated TVS on VBUS line (6.40 V) with fast clamping to protect USB power switch and port controller. Use Value: Sub-1 ps response ensures clamping occurs within first 100 ps of ESD event, maintaining USB enumeration stability and preventing hot-plug reset. |
| Automotive Lighting Driver Protection | On-board DC/DC Converter Input |
Use Scenario: Safeguards LED driver IC inputs against load dump transients in 12 V vehicle lighting systems. IC Role / Device Role / Timing Role: Primary overvoltage guard on driver VIN pin, absorbing ISO 7637-2 Pulse 2b (100 V/100 ms) energy. Use Value: 400 W peak power rating sustains 100 V × 4 A surge without thermal runaway, preserving driver IC functionality during battery disconnection events. |
Use Scenario: Protects buck converter input stage from ripple-induced overshoot and coupled switching noise in industrial PLC modules. IC Role / Device Role / Timing Role: Rail clamp between input capacitor and converter switch node, suppressing ringing-induced voltage excursions. Use Value: 11.3 V clamping voltage ensures input FET VDS remains below 80% of rated breakdown, extending lifetime under repeated transient stress. |
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 (Bourns) | DO-214AA (SMB) package; 7.0 V nominal VBR; 7.78 V VC @ 43.3 A; 600 W PPPM | Higher power rating but larger footprint; requires PCB layout change due to wider body and different pad spacing | Select when higher surge margin is needed and board space allows SMB package; not drop-in compatible with P4SMA7.5A |
| 1.5SMC7.5A (ON Semiconductor) | DO-214AB (SMC) package; 7.5 V nominal VBR; 12.0 V VC @ 33.3 A; 1500 W PPPM | Three times higher peak power but 2.5× larger footprint and higher thermal mass; unsuitable for dense SMT layouts | Choose for high-energy industrial transients where DO-214AC size constraint is relaxed; requires full layout review |
Compared with SMBJ7.0A and 1.5SMC7.5A, the P4SMA7.5A offers optimal balance of compact DO-214AC footprint, precise 7.13–7.88 V VBR tolerance, and 400 W surge capacity-making it ideal for space-constrained consumer and automotive auxiliary power designs where strict VWM/VC margins are critical.
Availability
P4SMA7.5A is available at Aetrix Electronics and suitable for switching mode power supplies, USB power delivery interfaces, and automotive lighting drivers requiring stable component supply with full traceability and lifecycle management.
Supply support for P4SMA7.5A 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 industrial, automotive, and consumer markets.
The P4SMA7.5A belongs to TSC's P4SMAx series of surface-mount TVS diodes engineered specifically for high-reliability DC rail protection in automotive and industrial power systems where ISO 7637-2 compliance and moisture-insensitive packaging are mandatory.
FAQ
What is the breakdown voltage range of the P4SMA7.5A?
The P4SMA7.5A has a guaranteed breakdown voltage (VBR) range of 7.13 V to 7.88 V at a test current of 10 mA, measured per ANSI/IEEE C62.35 standards. This tight tolerance ensures consistent overvoltage triggering across production lots and supports reliable design margining in 5–6 V logic-supply protection schemes. The P4SMA7.5A maintains this specification across its full operating temperature range of –55 °C to +150 °C.
Is the P4SMA7.5A suitable for bidirectional transient suppression?
No, the P4SMA7.5A is a unidirectional TVS diode intended only for DC rail protection with defined polarity. For bidirectional applications such as AC line or data-line protection, Taiwan Semiconductor specifies the P4SMA7.5CA variant (with "CA" suffix), which uses a center-tapped dual-die configuration. Using the P4SMA7.5A in reverse-biased AC scenarios risks permanent junction damage due to forward conduction beyond its 3.5 V maximum VF rating.
What is the maximum clamping voltage of the P4SMA7.5A under surge conditions?
The P4SMA7.5A exhibits a maximum clamping voltage (VC) of 11.3 V when subjected to a 10/1000 µs surge waveform with a peak current (IPPM) of 37 A. This value is measured at TA = 25 °C and represents the upper limit of voltage seen by protected circuitry during worst-case transient events. Derating applies at elevated ambient temperatures per Figure 2 in the official P4SMA7.5A datasheet.
Does the P4SMA7.5A meet automotive transient immunity standards?
Yes, the P4SMA7.5A is explicitly validated to meet ISO 7637-2 Pulse 1 (inductive spike), Pulse 2a/2b (load dump), and Pulse 3a/3b (capacitive coupling) requirements. Its 400 W peak pulse power rating, low clamping voltage, and glass-passivated junction ensure robust performance in 12 V automotive subsystems such as body control modules and LED lighting drivers. Compliance is confirmed in Taiwan Semiconductor's S2102 datasheet revision.
What packaging format is used for the P4SMA7.5A?
The P4SMA7.5A is supplied in tape-and-reel format with 7,500 units per reel, conforming to EIA-481 standards. The DO-214AC (SMA) package features gull-wing leads optimized for automated pick-and-place assembly and reflow soldering per J-STD-020 Level 1 moisture sensitivity classification-eliminating pre-bake requirements and supporting high-yield SMT production.
P4SMA7.5A 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6.4V
- Voltage - Breakdown (Min):
- 7.13V
- Voltage - Clamping (Max) @ Ipp:
- 11.3V
- Current - Peak Pulse (10/1000µs):
- 37A
- 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)
P4SMA7.5A FAQ
1.How can I place an order for P4SMA7.5A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA7.5A 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 P4SMA7.5A reliable?
The price and inventory of P4SMA7.5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA7.5A is usually 5 days.
3.What payment methods are accepted for P4SMA7.5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA7.5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA7.5A?
P4SMA7.5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA7.5A 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 P4SMA7.5A?
For technical support, including P4SMA7.5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA7.5A requirements.
6.How does Aetrix verify that P4SMA7.5A is sourced from the original manufacturer or authorized distributors?
All P4SMA7.5A 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 P4SMA7.5A meets industry standards.
7.What is the process for return or replacement of P4SMA7.5A?
All P4SMA7.5A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA7.5A, 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 P4SMA7.5A part is unused and in its original packaging.
Return procedure for P4SMA7.5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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