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Taiwan Semiconductor Corporation P4SMA7.5H
- Part No.:
- P4SMA7.5H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA7.5H.pdf
- Description:
- 400W, 7.5V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,993
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Product details
Overview
P4SMA7.5H from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for overvoltage protection in DC power rails. It features a 6.75–8.25 V breakdown voltage (VBR), 6.05 V working stand-off voltage (VWM), 11.7 V clamping voltage (VC) at 35 A peak pulse current, and 400 W peak pulse power rating per 10/1000 µs waveform - ideal for protecting automotive-grade SMPS inputs against ISO 7637-2 pulses.
For engineers reviewing the P4SMA7.5H datasheet, P4SMA7.5H pinout, P4SMA7.5H application, or P4SMA7.5H equivalent, key selection criteria include its AEC-Q101 qualification, <1 ps response time, <500 µA reverse leakage at VWM, glass-passivated junction, and UL 94V-0 molding compound - all critical for robust, high-reliability board-level surge suppression in automotive and industrial environments.
Technical Context
The P4SMA7.5H operates as a unidirectional avalanche diode with a single-die configuration optimized for fast clamping of transient energy on positive-polarity DC lines. Its junction is glass passivated to ensure stable leakage performance and long-term reliability under thermal cycling.
It meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements and is rated for operation across –55 °C to +150 °C junction temperature range. The device exhibits a 0.061 %/°C temperature coefficient of VBR, enabling predictable voltage drift over temperature in precision protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 10 mA | 6.75–8.25 V: Ensures reliable turn-on before system IC damage thresholds in 5 V–12 V rail applications. |
| VWM | 6.05 V: Allows safe operation above typical 5 V logic or USB supply rails without leakage-induced power loss. |
| VC @ IPPM = 35 A | 11.7 V: Limits downstream voltage stress during 400 W transients, protecting 12 V-rated components like MOSFET gate drivers. |
| IR @ VWM | <500 µA: Minimizes standby current drain in battery-powered or always-on systems. |
| PPPM | 400 W (10/1000 µs): Handles automotive load-dump and inductive-switching surges without degradation. |
| TJ max | +150 °C: Supports under-hood and high-temperature PCB placement without derating concerns. |
| Response time | <1.0 ps: Clamps faster than most microcontroller I/O or power stage propagation delays, preventing latch-up. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-ended cathode-banded configuration. Matte tin-plated leads meet J-STD-002 solderability; polarity marked by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | DC input / protected line side | Connected to the rail requiring transient suppression (e.g., +12 V input); referenced to ground via cathode. |
| Cathode | Ground reference / clamping node | Connected to system ground or low-impedance return path; conducts surge current to GND during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics use, including temperature cycling, humidity, and mechanical shock testing per standard. |
| Glass-passivated junction | Prevents moisture ingress and metallization migration, ensuring stable VBR and leakage over 15+ years in harsh environments. |
| UL 94V-0 molding compound | Self-extinguishing encapsulation prevents flame propagation during fault conditions in enclosed enclosures. |
| Moisture sensitivity level 1 | No bake required prior to reflow; compatible with standard SMT assembly processes without floor-life constraints. |
| ISO 7637-2 compliance | Guarantees immunity to real-world automotive electrical disturbances including load dump, alternator ripple, and inductive switching noise. |
Applications
| Switching Mode Power Supply (SMPS) | Automotive On-Board DC/DC Converter |
|---|---|
Use Scenario: Input-stage surge protection on 12 V primary-side rectifier output feeding a flyback controller. IC Role / Device Role: Unidirectional TVS clamp absorbing ISO 7637-2 Pulse 1 (inductive kick) and Pulse 2b (battery disconnect). Use Value: Prevents controller IC latch-up or gate oxide rupture by limiting transient voltage to ≤11.7 V while dissipating up to 400 W. | Use Scenario: Protection of 5 V/3.3 V secondary outputs in an automotive infotainment domain controller's buck converter. IC Role / Device Role: Secondary-side TVS suppressing coupling transients from adjacent high-current modules (e.g., motor drivers). Use Value: Maintains clean low-voltage rails during ECU reset events, avoiding brownout resets or data corruption in CAN/LIN interfaces. |
| Industrial Lighting Driver | USB-C Power Delivery Adapter |
Use Scenario: Overvoltage clamp on constant-current LED driver input subjected to lightning-induced surges in outdoor signage. IC Role / Device Role: Primary-line TVS absorbing 1 kV/500 A common-mode transients coupled through AC mains or long cable runs. Use Value: Enables Class II isolation design without external MOVs, reducing BOM count and improving long-term reliability vs. varistors. | Use Scenario: Input rail protection on USB-C PD sink controller IC (e.g., TUSB320) exposed to hot-plug voltage overshoot and ESD. IC Role / Device Role: Fast-response unidirectional clamp on VBUS line upstream of buck-boost regulator. Use Value: Limits VBUS to ≤11.7 V during 100 V/10 A surge events, preserving PD negotiation integrity and preventing controller latch-up. |
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 (SMB) package; 7.0 V nominal VBR; 7.78 V VC @ 34.4 A; 600 W PPPM. | Higher clamping voltage margin but larger footprint; better suited for space-tolerant 12 V systems with higher surge budgets. | Select SMBJ7.0A when board layout allows larger SMA-equivalent footprint and higher clamping voltage is acceptable for downstream component ratings. |
| 1.5SMC7.0A | DO-214AB (SMC) package; 7.0 V nominal VBR; 12.0 V VC @ 33.3 A; 1500 W PPPM. | Triple the peak power rating but 3× larger volume; intended for industrial mains-input stages, not compact DC/DC converters. | Choose 1.5SMC7.0A only for high-energy surge environments where PCB area and thermal mass permit larger SMC packaging. |
Compared with SMBJ7.0A and 1.5SMC7.0A, the P4SMA7.5H delivers optimal balance of compact DO-214AC footprint, AEC-Q101 qualification, and precise 6.05 V VWM for 5 V–12 V rail protection - making it preferred for space-constrained automotive and portable electronics where leakage, response speed, and qualification rigor are prioritized over raw power handling.
Availability
P4SMA7.5H is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial LED drivers, and USB-C power adapters requiring stable component supply with full traceability and AEC-Q101 compliance.
Supply support for P4SMA7.5H 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 high-reliability protection devices, rectifiers, and power management components.
The P4SMA7.5H belongs to TSC's AEC-Q101-qualified P4SMA series of surface-mount TVS diodes, engineered specifically for automotive and industrial DC power rail protection where fast response, low leakage, and environmental ruggedness are mandatory.
FAQ
What is the maximum clamping voltage of the P4SMA7.5H under standard test conditions?
The P4SMA7.5H has a maximum clamping voltage (VC) of 11.7 V at 35 A peak pulse current (IPPM) using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components rated for ≤12 V operation remain within safe voltage limits during surge events. The P4SMA7.5H maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is the P4SMA7.5H suitable for bidirectional transient suppression?
No, the P4SMA7.5H is a unidirectional TVS diode and must be used with correct polarity - anode to the protected line, cathode to ground. For bidirectional applications, Taiwan Semiconductor offers the P4SMA7.5AH variant (marked AGJ), which provides symmetrical clamping in both polarities. Using the P4SMA7.5H in reverse-biased configurations risks permanent breakdown and failure; always verify polarity alignment in schematic and layout for the P4SMA7.5H.
Does the P4SMA7.5H require special handling or baking before reflow soldering?
No, the P4SMA7.5H is rated at Moisture Sensitivity Level 1 per J-STD-020, meaning it has unlimited floor life and does not require dry-packaging or pre-reflow baking. Its DO-214AC (SMA) package uses matte tin-plated leads compliant with J-STD-002, supporting standard lead-free reflow profiles (e.g., JEDEC J-STD-020D). This simplifies manufacturing and eliminates moisture-related popcorning risk during assembly of the P4SMA7.5H.
How does the P4SMA7.5H compare to older SMA-package TVS diodes in terms of leakage current?
The P4SMA7.5H specifies maximum reverse leakage current (IR) of 500 µA at its 6.05 V working stand-off voltage (VWM), significantly lower than legacy SMA TVS parts that often exceed 1 mA at similar VWM. This low leakage is achieved via glass passivation and tight process control, reducing standby power loss in always-on systems - a critical advantage for battery-backed modules and low-power automotive ECUs using the P4SMA7.5H.
Can the P4SMA7.5H be used in place of a Zener diode for voltage regulation?
No, the P4SMA7.5H is not designed for continuous voltage regulation. It is a transient suppression device rated for non-repetitive 400 W surges, not steady-state power dissipation. Its VBR tolerance (6.75–8.25 V) and lack of tight regulation specs make it unsuitable as a replacement for precision Zener regulators. Use the P4SMA7.5H strictly for surge clamping - not for DC voltage reference or linear regulation functions.
P4SMA7.5H 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):
- 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)
P4SMA7.5H FAQ
1.How can I place an order for P4SMA7.5H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA7.5H 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 P4SMA7.5H reliable?
The price and inventory of P4SMA7.5H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA7.5H is usually 5 days.
3.What payment methods are accepted for P4SMA7.5H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA7.5H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA7.5H?
P4SMA7.5H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA7.5H 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 P4SMA7.5H?
For technical support, including P4SMA7.5H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA7.5H requirements.
6.How does Aetrix verify that P4SMA7.5H is sourced from the original manufacturer or authorized distributors?
All P4SMA7.5H 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 P4SMA7.5H meets industry standards.
7.What is the process for return or replacement of P4SMA7.5H?
All P4SMA7.5H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA7.5H, 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 P4SMA7.5H part is unused and in its original packaging.
Return procedure for P4SMA7.5H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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