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Taiwan Semiconductor Corporation P4SMA7.5AH
- Part No.:
- P4SMA7.5AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA7.5AH.pdf
- Description:
- 400W, 7.5V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,894
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Product details
Overview
P4SMA7.5AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 7.13–7.88V breakdown voltage at 10mA, and 11.3V clamping voltage at 37A (10/1000μs waveform), used to protect DC/DC converters and SMPS inputs against ESD and surge transients.
For engineers reviewing the P4SMA7.5AH datasheet, P4SMA7.5AH pinout, P4SMA7.5AH application, or P4SMA7.5AH equivalent, key selection criteria include working stand-off voltage (6.40V), maximum reverse leakage (500µA), clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, AEC-Q101 qualification, and DO-214AC thermal and mechanical compatibility with automated SMT assembly.
Technical Context
The P4SMA7.5AH operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology for stable breakdown and low leakage. Its fast response time (<1.0ps) enables suppression of nanosecond-scale ESD events, while its 150°C max junction temperature supports operation in automotive under-hood and industrial power supply environments.
Designed for single-die, cathode-banded configuration, it meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements. The device is not bidirectional - no CH/CAH suffix - and requires polarity-aware PCB layout with cathode band aligned to circuit ground reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 7.13–7.88 V at 10 mA test current - defines reliable avalanche initiation range for overvoltage detection |
| VWM | 6.40 V - maximum continuous reverse operating voltage before leakage exceeds 500 µA |
| VC @ IPPM | 11.3 V at 37 A (10/1000 μs) - clamping voltage limiting downstream IC stress during surge |
| PPPM | 400 W - peak pulse power handling per single non-repetitive transient per JEDEC standards |
| IR @ VWM | ≤500 µA - ensures minimal standby power loss in always-on power rails |
| TJ max | 150 °C - enables use in high-ambient-temperature applications such as engine control modules |
| Package | DO-214AC (SMA) - industry-standard SMT footprint compatible with IPC-7351B land patterns |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking on one end; matte tin-plated leads compliant with J-STD-002 solderability; weight ≈ 0.060 g; moisture sensitivity level (MSL) 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to protected line (e.g., +12V rail); conducts during forward surge only |
| Cathode | Ground reference | Marked by band; ties to system ground or low-impedance return path for effective clamping |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements including HTOL, TCT, and ESD-HBM/MM |
| Glass passivated junction | Ensures long-term stability of VBR and low parameter drift across temperature and life cycles |
| Clamping ratio (VC/VBR) | ~1.46 - tight ratio improves protection margin for 5V/12V logic and power rails |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| Fast response time | <1.0 ps - suppresses ESD events before sensitive downstream ICs experience latch-up or damage |
Applications
| Automotive Body Control Module (BCM) | Industrial SMPS Input Stage |
|---|---|
Use Scenario: Protects LIN bus interface and power input lines in BCMs exposed to load dump and jump-start surges. IC Role / Device Role: Unidirectional TVS placed between battery rail and local regulator input. Use Value: Clamps transients to ≤11.3 V, preserving 12V-input LDOs and microcontrollers without derating. | Use Scenario: Shields primary-side controller ICs and rectifier bridges in offline AC/DC adapters. IC Role / Device Role: Parallel-connected TVS at DC bus entry point upstream of bulk capacitor. Use Value: Absorbs 400W surges per IEC 61000-4-5 Level 4, preventing MOSFET gate oxide failure and controller reset. |
| LED Driver Power Input | On-board DC/DC Converter Protection |
Use Scenario: Safeguards constant-current LED drivers in streetlight and signage systems subject to lightning-induced surges. IC Role / Device Role: Standoff-rated TVS on 24–48V input rail prior to buck controller. Use Value: 6.40V VWM allows full utilization of 7–8V headroom while blocking normal ripple and noise. | Use Scenario: Secures 5V/3.3V point-of-load converters in telecom base station boards. IC Role / Device Role: Secondary-side TVS on output rail to suppress cross-talk and switching node coupling. Use Value: Low 500 µA leakage avoids loading low-power sleep-mode rails; DO-214AC fits dense board layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0A | DO-214AA (SMB) package; 7.0V VWM, 11.2V VC @ 34.1A; 600W rating | Higher power rating but larger footprint; less suitable for space-constrained SMA layouts | Select when higher surge margin is required and board area permits SMB footprint |
| 1.5SMC7.0A | DO-214AB (SMC) package; 7.0V VWM, 12.0V VC @ 33.3A; 1500W rating | Substantially larger package and clamping voltage; intended for primary-side mains-level protection | Use only where 1500W surge immunity is mandatory and thermal mass supports SMC mounting |
Compared with SMBJ7.0A and 1.5SMC7.0A, the P4SMA7.5AH delivers optimal balance of compact DO-214AC size, precise 6.40V standoff, and 400W capability - making it preferred for secondary-side 12V rail protection where layout density and leakage current are critical.
Availability
P4SMA7.5AH is available at Aetrix Electronics and suitable for automotive body control modules, industrial switch-mode power supplies, and LED driver designs requiring stable component supply with AEC-Q101 assurance and RoHS/halogen-free compliance.
Supply support for P4SMA7.5AH 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 P4SMA7.5AH belongs to TSC's AEC-Q101-qualified P4SMAx(A)H series - engineered specifically for robust transient suppression in automotive and industrial power interfaces where reliability, low leakage, and fast response are mandatory.
FAQ
What is the polarity configuration of the P4SMA7.5AH?
The P4SMA7.5AH is a unidirectional TVS diode with cathode band marking. It conducts only in reverse breakdown mode and must be oriented with the banded end toward ground. Unlike bidirectional variants (e.g., P4SMA7.5AH with CH/CAH suffix), the P4SMA7.5AH does not suppress positive-going transients on the anode side - correct polarity placement is essential for functional protection in the P4SMA7.5AH design.
Does the P4SMA7.5AH meet automotive qualification standards?
Yes, the P4SMA7.5AH is AEC-Q101 qualified and tested per stress conditions including high-temperature operating life (HTOL), temperature cycling (TCT), and human-body-model ESD (HBM). It also complies with ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms - confirming suitability for automotive power net applications such as body control modules and lighting controllers using the P4SMA7.5AH.
What is the maximum clamping voltage of the P4SMA7.5AH under standard surge conditions?
The P4SMA7.5AH has a maximum clamping voltage (VC) of 11.3 V at 37 A peak pulse current with a 10/1000 μs waveform. This value is measured per JEDEC/IEC standards and represents the upper limit of voltage seen by downstream circuitry during a defined transient event - a critical parameter for ensuring safe operation of 12V-rated regulators and microcontrollers protected by the P4SMA7.5AH.
Can the P4SMA7.5AH be used in bidirectional signal line protection?
No, the P4SMA7.5AH is strictly unidirectional and unsuitable for bidirectional signal lines such as CAN or USB data pairs. Its electrical characteristics apply only in reverse bias; forward conduction follows standard diode behavior with ~3.5 V drop at 25 A. For bidirectional protection, select a designated bipolar variant like P4SMA7.5AH with CAH suffix - the P4SMA7.5AH itself provides no symmetrical clamping capability.
What is the moisture sensitivity level (MSL) and reflow profile guidance for the P4SMA7.5AH?
The P4SMA7.5AH has a moisture sensitivity level (MSL) of 1 per J-STD-020, meaning it is not humidity-sensitive and may be stored indefinitely at ambient conditions without dry-pack requirements. Reflow soldering follows standard Pb-free profiles with peak temperature ≤260°C and time above liquidus (TAL) ≤60 seconds - fully compatible with standard DO-214AC SMT assembly processes used for the P4SMA7.5AH.
P4SMA7.5AH 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):
- 6.4V
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA7.5AH FAQ
1.How can I place an order for P4SMA7.5AH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA7.5AH 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 P4SMA7.5AH reliable?
The price and inventory of P4SMA7.5AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA7.5AH is usually 5 days.
3.What payment methods are accepted for P4SMA7.5AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA7.5AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA7.5AH?
P4SMA7.5AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA7.5AH 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 P4SMA7.5AH?
For technical support, including P4SMA7.5AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA7.5AH requirements.
6.How does Aetrix verify that P4SMA7.5AH is sourced from the original manufacturer or authorized distributors?
All P4SMA7.5AH 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 P4SMA7.5AH meets industry standards.
7.What is the process for return or replacement of P4SMA7.5AH?
All P4SMA7.5AH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA7.5AH, 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 P4SMA7.5AH part is unused and in its original packaging.
Return procedure for P4SMA7.5AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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