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Taiwan Semiconductor Corporation P4SMA24CAH
- Part No.:
- P4SMA24CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA24CAH.pdf
- Description:
- TVS DIODE 20.5VWM 33.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,803
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Product details
Overview
P4SMA24CAH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 22.8V–25.2V breakdown voltage (VBR), and 20.5V working stand-off voltage (VWM), designed to protect automotive-grade DC/DC converters and lighting circuits against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P4SMA24CAH datasheet, P4SMA24CAH pinout, P4SMA24CAH application, or P4SMA24CAH equivalent, key selection criteria include clamping voltage (33.2V @ 12.6A), AEC-Q101 qualification, bidirectional polarity marking, and moisture sensitivity level 1 compliance - all critical for under-hood automotive electronics and high-reliability industrial SMPS designs.
Technical Context
The P4SMA24CAH implements a glass-passivated silicon junction optimized for fast transient response (<1.0 ps), with symmetrical bidirectional clamping behavior confirmed across both polarities per electrical specifications. Its thermal design supports continuous operation from –55°C to +150°C junction temperature, and it meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements.
Electrical characteristics are fully specified at TA = 25°C with 1.0 mA test current (IT) and 10/1000 μs surge waveform; derating applies above ambient 25°C per Fig.2. The device exhibits a VBR temperature coefficient of 0.094 %/°C and maximum reverse leakage ≤1 μA at VWM, enabling low-power standby protection in always-on systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 22.8 V / 25.2 V at IT = 1.0 mA - defines reliable turn-on threshold for overvoltage clamping |
| VWM | 20.5 V - maximum continuous reverse operating voltage before leakage exceeds 1 μA |
| VC @ IPPM | 33.2 V at 12.6 A (10/1000 μs) - actual clamped voltage seen by protected circuit during surge |
| PPPM | 400 W - peak pulse power handling capacity under standardized transient waveform |
| IR @ VWM | ≤1 μA - ensures negligible standby current draw in battery-powered or energy-sensitive systems |
| TJ max | +150 °C - enables placement near heat-generating components in compact automotive modules |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with matte tin-plated leads |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case with cathode band marking; polarity is bidirectional - no anode/cathode distinction; terminals are symmetric and non-polarized. Weight: 0.060 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bidirectional) | Transient conduction path | Both terminals function identically as clamping nodes - no directional mounting required |
| Cathode band (marking) | Polarity indicator | Present for manufacturing traceability only; does not imply unidirectional operation in CAH suffix devices |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS power domains |
| Glass passivated junction | Enhances long-term reliability and stability of VBR under thermal cycling and humidity stress |
| ISO 7637-2 compliance | Guarantees robustness against real-world automotive load dump and inductive switching transients |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking - reduces manufacturing overhead and risk of popcorning |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive for environmentally constrained supply chains |
Applications
| Automotive Lighting Modules | On-Board DC/DC Converters |
|---|---|
Use Scenario: Protecting LED driver ICs and MOSFETs in headlamp and tail lamp assemblies exposed to battery line transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across input rails to limit voltage excursions during load dump or jump-start events. Use Value: Prevents latch-up or gate oxide damage in downstream regulators by clamping to ≤33.2 V during 12.6 A surges. | Use Scenario: Safeguarding isolated buck-boost controllers in vehicle infotainment and ADAS domain controllers. IC Role / Device Role / Timing Role: Primary rail protection device on 12 V or 48 V input side, positioned upstream of EMI filters and input capacitors. Use Value: Maintains system uptime by absorbing 400 W transients without degradation, supporting AEC-Q101 lifetime requirements. |
| Industrial Switching Power Supplies | Automotive Body Control Modules |
Use Scenario: Input-stage surge suppression in DIN-rail mounted AC/DC adapters used in factory automation equipment. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp responding within <1.0 ps to protect rectifier bridges and primary-side controllers. Use Value: Reduces need for redundant filtering stages due to low clamping ratio (VC/VWM = 1.62). | Use Scenario: Protecting LIN/CAN interface power rails and microcontroller I/O in door module and seat control units. IC Role / Device Role / Timing Role: Secondary-level transient suppressor on local 5 V or 3.3 V rails derived from main vehicle battery. Use Value: Ensures signal integrity and prevents reset faults during ignition transients by limiting leakage to ≤1 μA at 20.5 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CA | 600 W rating, SMB package (larger footprint), VC = 38.9 V @ 15.4 A | Higher power margin but requires PCB area increase; less suitable for ultra-compact layouts | Select when higher surge margin is needed and board space allows SMB footprint |
| 1.5SMC24CA | 1500 W rating, SMC package (3.5 mm × 7.0 mm), VC = 38.9 V @ 38.5 A | Designed for heavy-duty industrial surge environments; not AEC-Q101 qualified | Choose for non-automotive applications requiring extreme pulse robustness |
Compared with SMBJ24CA and 1.5SMC24CA, the P4SMA24CAH delivers optimal balance of AEC-Q101 compliance, compact DO-214AC footprint, and precise 33.2 V clamping - making it the preferred choice for space-constrained automotive modules where qualification and consistency are mandatory.
Availability
P4SMA24CAH is available at Aetrix Electronics and suitable for automotive lighting modules, on-board DC/DC converters, and industrial switching power supplies requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for P4SMA24CAH 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, and power devices for automotive and industrial markets.
The P4SMA series was developed specifically for AEC-Q101-compliant transient protection in harsh automotive environments, emphasizing reliability, fast response, and standardized surface-mount compatibility.
FAQ
What does the "CAH" suffix indicate in P4SMA24CAH?
The "CAH" suffix denotes a bidirectional configuration with A-grade tolerance (tighter VBR spread: 22.8 V–25.2 V) and halogen-free construction. Unlike unidirectional "H" variants, P4SMA24CAH provides symmetrical clamping in both directions and carries AEC-Q101 qualification - essential for protecting differential or floating rails in automotive systems. This distinguishes it from P4SMA24H and confirms its suitability for ISO 7637-2 Pulse 1/2a/2b/3a/3b testing.
Is P4SMA24CAH compatible with lead-free reflow soldering processes?
Yes, P4SMA24CAH features matte tin-plated leads compliant with J-STD-002 and supports standard lead-free reflow profiles up to 260°C peak. Its moisture sensitivity level (MSL) is rated Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH and placed directly into reflow without pre-baking - reducing process complexity and preventing popcorn failure during assembly.
How does the clamping performance of P4SMA24CAH compare to unidirectional P4SMA24AH?
P4SMA24CAH and P4SMA24AH share identical VBR, VWM, and VC specifications (33.2 V @ 12.6 A), but P4SMA24CAH delivers symmetrical clamping in both polarities while P4SMA24AH is unidirectional. This makes P4SMA24CAH ideal for AC-coupled or floating bus protection, whereas P4SMA24AH suits DC rails with defined polarity. Both meet AEC-Q101 and ISO 7637-2, but only P4SMA24CAH supports true bidirectional surge immunity.
Can P4SMA24CAH be used in place of P4SMA24H in existing designs?
No - P4SMA24H is unidirectional with wider VBR tolerance (21.6 V–26.4 V) and lacks AEC-Q101 qualification and halogen-free certification. Substituting P4SMA24CAH for P4SMA24H introduces bidirectional behavior and tighter parametric control, which may alter system-level transient response. Requalification per ISO 7637-2 and layout review for polarity independence are required before replacement.
What is the maximum allowable surge current for P4SMA24CAH under 10/1000 μs waveform?
The maximum peak impulse current (IPPM) for P4SMA24CAH is 12.6 A under the standardized 10/1000 μs double-exponential surge waveform. This value is derived directly from its 400 W peak pulse power rating and 33.2 V clamping voltage (IPPM = PPPM/VC). It is validated per Fig.5 waveform definition and must be applied with appropriate derating above TA = 25°C per Fig.2.
P4SMA24CAH 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):
- 20.5V
- Voltage - Breakdown (Min):
- 22.8V
- Voltage - Clamping (Max) @ Ipp:
- 33.2V
- Current - Peak Pulse (10/1000µs):
- 12.6A
- 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)
P4SMA24CAH FAQ
1.How can I place an order for P4SMA24CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA24CAH 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 P4SMA24CAH reliable?
The price and inventory of P4SMA24CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA24CAH is usually 5 days.
3.What payment methods are accepted for P4SMA24CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA24CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA24CAH?
P4SMA24CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA24CAH 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 P4SMA24CAH?
For technical support, including P4SMA24CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA24CAH requirements.
6.How does Aetrix verify that P4SMA24CAH is sourced from the original manufacturer or authorized distributors?
All P4SMA24CAH 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 P4SMA24CAH meets industry standards.
7.What is the process for return or replacement of P4SMA24CAH?
All P4SMA24CAH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA24CAH, 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 P4SMA24CAH part is unused and in its original packaging.
Return procedure for P4SMA24CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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