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Taiwan Semiconductor Corporation P4SMA12CAH
- Part No.:
- P4SMA12CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA12CAH.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,333
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Product details
Overview
P4SMA12CAH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power, 12V nominal breakdown voltage (11.4–12.6V), and clamping voltage of 16.7V at 25A. It protects DC/DC converters and automotive power supplies against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the P4SMA12CAH datasheet, P4SMA12CAH pinout, P4SMA12CAH application, or P4SMA12CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, sub-1ps response time, <1µA leakage at 10.2V, and compliance with automotive surge immunity standards.
Technical Context
The P4SMA12CAH implements a glass-passivated silicon junction optimized for fast transient suppression in automotive and industrial power rails. Its bidirectional configuration enables symmetrical clamping across both polarities without external polarity management.
It operates over –55°C to +150°C junction temperature range, supports 40A non-repetitive forward surge current, and maintains clamping performance under 10/1000μs waveform stress per IEC 61000-4-5 and ISO 7637-2. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 11.4 V / 12.6 V at 1 mA test current - defines guaranteed breakdown threshold for reliable overvoltage triggering |
| VWM | 10.2 V - maximum continuous reverse working voltage before leakage exceeds 1 µA |
| VC@IPPM | 16.7 V at 25 A (10/1000 μs) - clamping voltage limiting downstream component stress during surge events |
| PPPM | 400 W - peak pulse power handling capacity under standardized surge waveform |
| IR@VWM | <1 µA - ensures minimal standby power loss and signal integrity in high-impedance circuits |
| Response time | <1.0 ps - enables suppression of nanosecond-scale ESD and switching transients before IC damage occurs |
| TJ max | +150 °C - supports operation in under-hood automotive environments and thermally constrained PCB layouts |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bidirectional, cathode band not applicable (symmetrical terminals).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Transient conduction path | Both terminals function identically - conducts surge current in either direction when voltage exceeds ±11.4 V |
| Case | Mechanical mounting / thermal path | Plastic body provides UL 94V-0 flammability rating; solderable matte tin leads per J-STD-002 |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards |
| Glass passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives |
| ISO 7637-2 compliance | Guaranteed suppression of Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) waveforms |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking or dry-pack requirements - reduces manufacturing overhead |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally restricted substances |
Applications
| Automotive Power Distribution | Industrial DC/DC Converters |
|---|---|
Use Scenario: Protection of 12V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed at input stage to clamp surges before they reach PMIC or microcontroller power rails. Use Value: Withstands 400W pulses and clamps to ≤16.7V, preventing latch-up or permanent damage to 16V-rated downstream regulators. | Use Scenario: Input surge protection for isolated 24V-to-5V flyback converters in factory automation controllers. IC Role / Device Role / Timing Role: Primary-side TVS absorbing line transients induced by relay switching or motor drive noise. Use Value: Sub-1ps response ensures clamping initiates before transformer saturation or MOSFET avalanche, preserving converter efficiency and reliability. |
| LED Driver Modules | On-Board Charger Interfaces |
Use Scenario: Transient suppression on constant-current LED string inputs exposed to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Parallel-connected TVS shunting surge energy away from LED driver ICs and current-sense resistors. Use Value: 1 µA leakage at 10.2V avoids false triggering or bias current errors in precision current regulation loops. | Use Scenario: Input protection for AC/DC front-end stages in EV on-board chargers subjected to grid surges and coupling noise. IC Role / Device Role / Timing Role: First-line defense against 10/1000μs surges per IEC 61000-4-5 prior to active rectification and PFC stages. Use Value: 400W rating and 150°C TJ max enable sustained operation in thermally dense OBC modules without derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA | 600W peak power, SMB package (larger footprint), 13.3V clamping at 30A | Better suited for higher-energy surges but requires larger PCB area and has slower thermal response | Select when system-level surge testing exceeds 400W or when legacy SMB layout exists |
| 1.5KE12CA | Through-hole TO-204AA (DO-41), 1500W rating, 19.9V clamping at 75.5A | Designed for board-level primary protection; incompatible with automated SMT assembly | Choose only for prototyping, repair, or low-volume through-hole designs where reflow compatibility is not required |
Compared with SMBJ12CA and 1.5KE12CA, the P4SMA12CAH offers optimal balance of SMT manufacturability, AEC-Q101 qualification, and 400W surge handling in the smallest standardized surface-mount TVS footprint - making it preferred for space-constrained automotive and industrial modules requiring zero manual assembly steps.
Availability
P4SMA12CAH is available at Aetrix Electronics and suitable for automotive power distribution, industrial DC/DC converters, and LED driver modules requiring stable component supply with full traceability and lifecycle support.
Supply support for P4SMA12CAH 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 since 1979.
The P4SMA series belongs to TSC's AEC-Q101-qualified surface-mount TVS portfolio, engineered specifically for robust transient immunity in automotive electronics, industrial power systems, and lighting applications where reliability under harsh electrical stress is mandatory.
FAQ
What does the "CAH" suffix indicate in P4SMA12CAH?
The "CAH" suffix denotes a bidirectional configuration (C), AEC-Q101 qualification (A), and halogen-free construction (H). Unlike unidirectional variants (e.g., P4SMA12H), the P4SMA12CAH provides symmetrical clamping for both positive and negative transients without polarity-sensitive placement - critical for protecting floating or AC-coupled power rails.
Is P4SMA12CAH compatible with lead-free reflow profiles?
Yes, P4SMA12CAH uses matte tin-plated leads compliant with J-STD-002 and supports standard lead-free reflow profiles up to 260°C peak temperature. Its MSL Level 1 rating means it can be stored indefinitely at ambient conditions without baking, simplifying SMT line integration and reducing process risk.
How does P4SMA12CAH meet ISO 7637-2 requirements?
P4SMA12CAH is tested and characterized to suppress all five ISO 7637-2 transient waveforms: Pulse 1 (inductive switch-off), Pulse 2a (sudden load disconnection), Pulse 2b (alternator field decay), Pulse 3a (capacitive discharge), and Pulse 3b (supply line coupling). Its 400W rating and 16.7V clamping ensure compliance across the full 12V automotive system envelope.
What is the maximum operating temperature for P4SMA12CAH?
The P4SMA12CAH has a maximum junction temperature (TJ) of +150°C and an operating ambient range of –55°C to +150°C. This allows deployment in under-hood automotive locations, industrial motor drives, and enclosed LED fixtures where thermal management is limited - provided PCB copper area and airflow meet TSC's recommended thermal pad layout.
Can P4SMA12CAH replace P4SMA12AH in existing designs?
No - P4SMA12AH is unidirectional, while P4SMA12CAH is bidirectional. Swapping them requires verifying circuit topology: if the protected node is referenced to ground and only sees positive transients, P4SMA12AH may suffice; however, for floating, differential, or AC-biased rails, P4SMA12CAH is mandatory. Always validate clamping behavior using actual surge waveforms before substitution.
P4SMA12CAH 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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 25A
- 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)
P4SMA12CAH FAQ
1.How can I place an order for P4SMA12CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA12CAH 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 P4SMA12CAH reliable?
The price and inventory of P4SMA12CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA12CAH is usually 5 days.
3.What payment methods are accepted for P4SMA12CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA12CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA12CAH?
P4SMA12CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA12CAH 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 P4SMA12CAH?
For technical support, including P4SMA12CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA12CAH requirements.
6.How does Aetrix verify that P4SMA12CAH is sourced from the original manufacturer or authorized distributors?
All P4SMA12CAH 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 P4SMA12CAH meets industry standards.
7.What is the process for return or replacement of P4SMA12CAH?
All P4SMA12CAH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA12CAH, 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 P4SMA12CAH part is unused and in its original packaging.
Return procedure for P4SMA12CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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