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Taiwan Semiconductor Corporation P4SMA75CAH
- Part No.:
- P4SMA75CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA75CAH.pdf
- Description:
- TVS DIODE 64.1VWM 103VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,262
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Product details
Overview
P4SMA75CAH from Taiwan Semiconductor is a bidirectional 400W surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, with a working stand-off voltage of 64.1 V, breakdown voltage range 71.3–78.8 V at 1 mA, clamping voltage of 103 V at 4.0 A (10/1000 µs), and AEC-Q101 qualification for automotive-grade surge protection in DC/DC converters.
For engineers reviewing the P4SMA75CAH datasheet, P4SMA75CAH pinout, P4SMA75CAH application, or P4SMA75CAH equivalent, key selection criteria include bidirectional clamping performance, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, moisture sensitivity level 1, and compatibility with automated SMT placement in high-reliability power rail protection.
Technical Context
The P4SMA75CAH is a glass-passivated, single-die, bidirectional TVS diode designed to protect sensitive electronics against fast transient overvoltages. Its junction structure enables sub-1 ps response time and low leakage (<1 µA at VWM), while meeting stringent automotive EMC requirements including ISO 7637-2 Pulse 1 (inductive load dump suppression) and Pulse 3b (capacitive coupling noise).
It operates across –55 °C to +150 °C junction temperature range and features matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance. The device is rated for 400 W peak pulse power under 10/1000 µs waveform and supports unidirectional or bidirectional configurations via H (unidirectional) or CAH (bidirectional) suffixes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64.1 V - Maximum continuous reverse operating voltage before significant leakage; defines safe DC bias margin for 72 V nominal systems. |
| VBR @ IT=1 mA | 71.3–78.8 V - Breakdown onset range; ensures reliable conduction onset above system transients but below IC absolute maximum ratings. |
| VC @ IPPM=4.0 A | 103 V - Clamped voltage during 10/1000 µs surge; limits downstream stress to ≤103 V for 4 A peak current events. |
| PPPM | 400 W - Peak pulse power rating; supports robust protection against repetitive or single high-energy transients per ISO 7637-2. |
| IR @ VWM | <1 µA - Ultra-low reverse leakage; minimizes standby power loss and avoids false triggering in high-impedance sensing rails. |
| TJ Range | –55 °C to +150 °C - Full automotive temperature operation; enables use in engine bay, powertrain, and under-hood modules. |
| Package | DO-214AC (SMA) - Standardized SMT outline with cathode band marking; compatible with IPC-7351B footprint and reflow profiles. |
Pinout & Package
DO-214AC (SMA) surface-mount package with axial lead configuration: Cathode (marked band) and Anode terminals. Matte tin-plated leads meet J-STD-002 solderability and JESD 201 Class 2 whisker resistance. Polarity is marked by a cathode band on the molded body; no internal polarity distinction in bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode Band End | Reference terminal for unidirectional mode; common node in bidirectional configuration | Serves as polarity reference during layout; in P4SMA75CAH, both terminals are functionally symmetric for AC-coupled surge suppression. |
| Anode End | Second terminal; forms symmetrical clamping path with cathode | Enables equal clamping in both directions; eliminates need for orientation-aware PCB placement in differential or floating rail protection. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including powertrain, body control, and ADAS modules per stress test requirements. |
| Glass passivated junction | Enhances long-term reliability and humidity resistance; prevents surface leakage degradation in harsh environments. |
| ISO 7637-2 compliance | Guarantees immunity to standardized vehicle electrical disturbances: Pulse 1 (load dump), Pulse 2a/2b (switching transients), Pulse 3a/3b (line impedance stabilization). |
| Moisture sensitivity level 1 | Allows unlimited floor life before reflow; eliminates baking requirement and simplifies SMT line integration. |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive; supports green manufacturing and end-of-life recycling compliance. |
Applications
| Automotive Power Distribution | Industrial DC/DC Converters |
|---|---|
Use Scenario: Protection of 12 V/24 V battery-fed ECUs against load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed at input filter stage to limit surges to ≤103 V before DC/DC controller IC. Use Value: Prevents latch-up or gate oxide damage in buck controllers (e.g., MPQ4312, LM5017) during ISO 7637-2 Pulse 1 events up to 100 V. | Use Scenario: Input rail protection in isolated 48 V-to-12 V telecom DC/DC modules exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary transient shunt across bulk capacitor input to absorb 400 W pulses without derating converter efficiency. Use Value: Maintains <1 µA leakage at 64.1 V stand-off, avoiding unnecessary quiescent current draw in always-on auxiliary supplies. |
| LED Driver Power Stages | On-Board Charger (OBC) Auxiliary Supplies |
Use Scenario: Surge suppression on constant-current LED string inputs in automotive headlamps subjected to ESD and switching noise. IC Role / Device Role / Timing Role: Fast-response (sub-1 ps) clamp parallel to LED driver IC (e.g., AL8863) to prevent overvoltage shutdown. Use Value: Clamps transients within 103 V before driver IC's 120 V absolute max rating, enabling robust operation without external crowbar circuits. | Use Scenario: Protection of 12 V auxiliary supply rails in EV on-board chargers during high-voltage isolation barrier coupling events. IC Role / Device Role / Timing Role: Bidirectional TVS on isolated secondary side to suppress coupled transients from primary-side MOSFET switching. Use Value: Withstands –55 °C to +150 °C ambient, ensuring reliability in thermally constrained OBC enclosures without thermal derating penalties. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ75CA | 600 W rating, SMB package (larger footprint), same VWM/VC specs | Better suited for higher-energy transients; requires PCB area increase and re-layout | Select when >400 W pulse handling is required and space permits larger SMB footprint. |
| 1.5KE75CA | 1500 W rating, DO-201AD through-hole package, higher VC (123 V) | Through-hole mounting only; not suitable for automated SMT lines or space-constrained boards | Choose only for legacy through-hole designs where 1.5 kW surge margin justifies manual assembly and board real estate cost. |
Compared with SMBJ75CA and 1.5KE75CA, the P4SMA75CAH delivers optimal balance of 400 W surge capability, DO-214AC SMT compatibility, AEC-Q101 qualification, and ultra-low leakage-making it ideal for new automotive and industrial SMT designs where footprint, reliability, and process compatibility are prioritized over extreme energy handling.
Availability
P4SMA75CAH is available at Aetrix Electronics and suitable for automotive power distribution, industrial DC/DC converters, LED driver protection, and on-board charger auxiliary supplies requiring stable component supply and full AEC-Q101 traceability.
Supply support for P4SMA75CAH 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 Company (TSC) is a vertically integrated Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The P4SMA75CAH belongs to TSC's AEC-Q101-qualified P4SMAx(A)H series of surface-mount TVS diodes, engineered specifically for robust, automated SMT deployment in automotive subsystems subject to ISO 7637-2 and harsh environmental conditions.
FAQ
What is the clamping voltage of the P4SMA75CAH under standard surge conditions?
The P4SMA75CAH has a maximum clamping voltage (VC) of 103 V at 4.0 A peak pulse current using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see no more than 103 V during defined transient events. The P4SMA75CAH maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C), with minimal drift due to its 0.105 %/°C VBR temperature coefficient.
Is the P4SMA75CAH suitable for automotive applications?
Yes, the P4SMA75CAH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements-making it suitable for automotive power distribution modules, body control units, and ADAS subsystems. Its DO-214AC package supports automated placement, and its moisture sensitivity level 1 eliminates bake requirements. The P4SMA75CAH also complies with RoHS and halogen-free standards per IEC 61249-2-21.
How does the CAH suffix differ from CH or H in the P4SMA75CAH part number?
The "CAH" suffix in P4SMA75CAH denotes a bidirectional configuration with symmetrical clamping in both polarities, whereas "H" indicates unidirectional operation and "CH" is an alternate bidirectional marking used in earlier revisions. Per TSC documentation, CAH devices like the P4SMA75CAH have identical electrical characteristics in both directions-including matched VBR, VC, and leakage-and are intended for AC-coupled or floating-rail protection where polarity cannot be guaranteed. The P4SMA75CAH uses the CAH designation consistently across its datasheet and ordering code.
What is the maximum peak pulse current the P4SMA75CAH can handle?
The P4SMA75CAH is rated for a maximum peak impulse current (IPPM) of 4.0 A under the 10/1000 µs double-exponential waveform. This corresponds to its 400 W peak pulse power rating (PPPM). Derating applies above 25 °C ambient per Figure 2 in the datasheet, with usable IPPM decreasing linearly to ~2.8 A at 100 °C ambient. The P4SMA75CAH sustains this rating without degradation when mounted on a standard 1-inch² copper pad per JEDEC standards.
Does the P4SMA75CAH require special PCB layout considerations?
Yes-the P4SMA75CAH benefits from low-inductance layout: short, wide traces to minimize parasitic inductance that could elevate clamping voltage during fast transients. TSC recommends the DO-214AC pad layout per IPC-7351B with thermal relief for soldering reliability. Because the P4SMA75CAH is bidirectional, orientation is not critical, but the cathode band should still be marked for traceability. Avoid placing the P4SMA75CAH near heat sources exceeding 150 °C junction temperature, and ensure ≥0.5 mm clearance to adjacent conductors per IPC-2221.
P4SMA75CAH 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 64.1V
- Voltage - Breakdown (Min):
- 71.3V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 4A
- 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)
P4SMA75CAH FAQ
1.How can I place an order for P4SMA75CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA75CAH 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 P4SMA75CAH reliable?
The price and inventory of P4SMA75CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA75CAH is usually 5 days.
3.What payment methods are accepted for P4SMA75CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA75CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA75CAH?
P4SMA75CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA75CAH 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 P4SMA75CAH?
For technical support, including P4SMA75CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA75CAH requirements.
6.How does Aetrix verify that P4SMA75CAH is sourced from the original manufacturer or authorized distributors?
All P4SMA75CAH 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 P4SMA75CAH meets industry standards.
7.What is the process for return or replacement of P4SMA75CAH?
All P4SMA75CAH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA75CAH, 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 P4SMA75CAH part is unused and in its original packaging.
Return procedure for P4SMA75CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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