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Taiwan Semiconductor Corporation P4SMA47CAH
- Part No.:
- P4SMA47CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA47CAH.pdf
- Description:
- TVS DIODE 40.2VWM 64.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,571
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Product details
Overview
P4SMA47CAH from Taiwan Semiconductor is a bidirectional 400W surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, with a nominal breakdown voltage of 47 V (min 44.7 V, max 49.4 V), clamping voltage of 64.8 V at 6.4 A, and working stand-off voltage of 40.2 V. It is AEC-Q101 qualified and designed for automotive-grade surge protection in DC/DC converters and lighting systems.
For engineers reviewing the P4SMA47CAH datasheet, P4SMA47CAH pinout, P4SMA47CAH application, or P4SMA47CAH equivalent, key selection criteria include bidirectional clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, low leakage (<1 µA at 40.2 V), fast response (<1.0 ps), and compliance with JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity.
Technical Context
The P4SMA47CAH implements a glass-passivated silicon junction optimized for bidirectional transient suppression, delivering symmetrical clamping in both polarities per its CAH suffix designation. Its 400 W peak pulse power rating (10/1000 µs waveform) and 64.8 V maximum clamping voltage at 6.4 A ensure robust protection against load dump and inductive switching events.
Designed for automotive environments, it operates across –55 °C to +150 °C junction temperature range and meets ISO 7637-2 test pulses without derating up to 125 °C ambient. The device's <1 µA reverse leakage at VWM and 0.101 %/°C VBR temperature coefficient support stable operation in thermally demanding onboard power systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 44.7 V / 49.4 V - Ensures reliable turn-on above system operating voltage while avoiding false triggering |
| VWM | 40.2 V - Maximum continuous reverse voltage before significant leakage begins; matches 36 V nominal automotive rail |
| VC@IPPM | 64.8 V at 6.4 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress below 65 V |
| PPPM | 400 W - Peak pulse power handling capability per standard 10/1000 µs waveform |
| IR@VWM | <1 µA - Ultra-low leakage preserves battery life in always-on vehicle modules |
| TJ max | +150 °C - Enables placement near hot components like MOSFETs or inductor cores without thermal derating |
| Package | DO-214AC (SMA) - Industry-standard SMD outline with 0.060 g mass and matte tin-plated leads per J-STD-002 |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking; bidirectional configuration requires no polarity orientation during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | Both terminals function identically; no fixed anode/cathode - enables flexible PCB layout in AC-coupled or floating rails |
| Case | Non-electrical mechanical interface | Plastic body provides UL 94V-0 flammability rating and thermal dissipation path to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive underhood applications including temperature cycling, humidity bias, and mechanical shock |
| Glass passivated junction | Enhances long-term reliability and stability of VBR under repeated surge stress and high-humidity conditions |
| 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 - Limits voltage overshoot before protection activates, critical for safeguarding fast-switching gate drivers |
| J-STD-020 Level 1 MSL | Zero floor life limitation - supports unlimited storage and reflow without baking preconditioning |
Applications
| Automotive Lighting Control | On-Board DC/DC Converter |
|---|---|
Use Scenario: Protecting LED driver ICs and MOSFETs in headlamp modules subjected to load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed across input rails to clamp transients before they reach buck controller and gate driver stages. Use Value: 64.8 V clamping ensures logic-level MOSFETs (e.g., 80 V rated) remain within safe SOA during 12 V system surges exceeding 100 V. | Use Scenario: Input-side surge suppression in 12 V-to-5 V/3.3 V buck converters powering ADAS sensors and infotainment ECUs. IC Role / Device Role / Timing Role: Primary transient shunt on converter input, coordinated with upstream fuse and downstream LC filtering. Use Value: 400 W peak power rating handles repetitive ISO 7637-2 Pulse 1 events without degradation, supporting >100,000 cycle lifetime. |
| Industrial Power Adapter | Switched-Mode Power Supply (SMPS) |
Use Scenario: Secondary-side overvoltage protection in universal-input AC/DC adapters used in factory automation I/O modules. IC Role / Device Role / Timing Role: Bidirectional clamp across isolated output rails to prevent damage from reflected transients or feedback loop faults. Use Value: Symmetrical VBR (44.7–49.4 V) ensures consistent protection regardless of output polarity reversal during maintenance or testing. | Use Scenario: Input rail protection in telecom-grade 48 V SMPS where EMI filters and MOVs alone cannot suppress fast-rising transients. IC Role / Device Role / Timing Role: Fast-response TVS placed immediately after EMI filter to intercept sub-microsecond spikes before reaching PFC stage. Use Value: Sub-1 ps response time reduces let-through energy by >40% compared to standard 1 ns TVS, lowering stress on bridge rectifier and bulk capacitor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ47CA | 600 W rating, SMB package (larger footprint), same VBR range and bidirectional configuration | Better suited for higher-energy surges but requires PCB area increase and may not fit tight-layout automotive modules | Select when system-level testing shows 400 W insufficient for worst-case ISO 7637-2 Pulse 1 repetition rate |
| 1.5KE47CA | 1500 W rating, axial DO-201AD package, same VBR and bidirectional behavior | Through-hole mounting only; incompatible with automated SMT lines and unsuitable for vibration-prone automotive chassis mounting | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ47CA and 1.5KE47CA, the P4SMA47CAH delivers optimal balance of 400 W surge capacity, DO-214AC SMT compatibility, AEC-Q101 qualification, and minimal board space - making it the preferred choice for new automotive and industrial SMT power rail protection designs.
Availability
P4SMA47CAH is available at Aetrix Electronics and suitable for automotive lighting control, on-board DC/DC converters, and industrial power adapters requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA47CAH 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers with global distribution and AEC-Q101 validation capabilities.
The P4SMA47CAH belongs to TSC's P4SMAx(A)H family of automotive-grade surface-mount TVS diodes, engineered specifically for ISO 7637-2-compliant transient suppression in 12 V and 24 V vehicle electrical systems.
FAQ
What does the "CAH" suffix indicate in P4SMA47CAH?
The "CAH" suffix in P4SMA47CAH denotes a bidirectional configuration with AEC-Q101 qualification and halogen-free construction. Unlike unidirectional "H" variants, the "C" signifies symmetrical clamping in both polarities, enabling use in AC-coupled or floating circuits without polarity concerns. This matches the device's specified bidirectional electrical characteristics and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance. The P4SMA47CAH is fully characterized for reverse and forward conduction under surge conditions.
Does P4SMA47CAH require orientation during PCB placement?
No, the P4SMA47CAH does not require specific orientation during PCB placement because it is a bidirectional TVS diode. Its DO-214AC (SMA) package has no anode or cathode designation for functional operation - both terminals behave identically under transient conditions. The cathode band marking shown in TSC's package outline is for mechanical reference only and does not affect electrical performance. This simplifies automated pick-and-place and eliminates risk of misorientation in the P4SMA47CAH assembly process.
What is the maximum clamping voltage of P4SMA47CAH under standard surge conditions?
The maximum clamping voltage of P4SMA47CAH is 64.8 V when subjected to a 10/1000 µs peak impulse current of 6.4 A, as specified in TSC's Electrical Specifications table. This value represents the upper limit of voltage seen by downstream circuitry during standardized surge testing and is guaranteed across the full operating temperature range (–55 °C to +150 °C). The P4SMA47CAH maintains this clamping performance without degradation under repetitive surge events meeting ISO 7637-2 requirements.
Is P4SMA47CAH compatible with lead-free reflow soldering processes?
Yes, the P4SMA47CAH is fully compatible with lead-free reflow soldering processes. Its matte tin-plated leads meet J-STD-002 solderability requirements, and its DO-214AC (SMA) molding compound is rated UL 94V-0 for flammability. The device is qualified for peak reflow temperatures up to 260 °C per J-STD-020 Level 1, with no floor life limitation due to its moisture sensitivity level (MSL) 1 rating. These attributes ensure robust intermetallic formation and joint integrity during standard Pb-free reflow profiles used for the P4SMA47CAH.
How does P4SMA47CAH differ from the unidirectional P4SMA47H variant?
The P4SMA47CAH differs from P4SMA47H in three key ways: it is bidirectional (vs. unidirectional), carries AEC-Q101 qualification (P4SMA47H lacks this), and features halogen-free construction per IEC 61249-2-21 (P4SMA47H documentation does not specify halogen status). Electrically, P4SMA47CAH exhibits symmetrical VBR, VC, and IR in both directions, while P4SMA47H only specifies reverse characteristics. The P4SMA47CAH is therefore mandatory for automotive applications requiring bidirectional surge immunity and formal automotive qualification.
P4SMA47CAH 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):
- 40.2V
- Voltage - Breakdown (Min):
- 44.7V
- Voltage - Clamping (Max) @ Ipp:
- 64.8V
- Current - Peak Pulse (10/1000µs):
- 6.4A
- 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)
P4SMA47CAH FAQ
1.How can I place an order for P4SMA47CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA47CAH 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 P4SMA47CAH reliable?
The price and inventory of P4SMA47CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA47CAH is usually 5 days.
3.What payment methods are accepted for P4SMA47CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA47CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA47CAH?
P4SMA47CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA47CAH 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 P4SMA47CAH?
For technical support, including P4SMA47CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA47CAH requirements.
6.How does Aetrix verify that P4SMA47CAH is sourced from the original manufacturer or authorized distributors?
All P4SMA47CAH 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 P4SMA47CAH meets industry standards.
7.What is the process for return or replacement of P4SMA47CAH?
All P4SMA47CAH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA47CAH, 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 P4SMA47CAH part is unused and in its original packaging.
Return procedure for P4SMA47CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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