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Taiwan Semiconductor Corporation P4SMA68CAH
- Part No.:
- P4SMA68CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA68CAH.pdf
- Description:
- TVS DIODE 58.1VWM 92VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,304
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Product details
Overview
P4SMA68CAH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for automotive-grade surge protection in DC power rails and signal lines. It features a 68V working stand-off voltage (VWM = 58.1 V), 64.6–71.4 V breakdown voltage (VBR), 400 W peak pulse power (10/1000 µs), clamping voltage of 92.0 V at 4.5 A, and operates across –55 °C to +150 °C junction temperature range - deployed in on-board DC/DC converters and lighting systems.
For engineers reviewing the P4SMA68CAH datasheet, P4SMA68CAH pinout, P4SMA68CAH application, or P4SMA68CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, DO-214AC (SMA) package compatibility, and low leakage (<1 µA at VWM).
Technical Context
The P4SMA68CAH implements a glass-passivated silicon junction optimized for fast transient suppression with sub-1 ps response time. Its bidirectional configuration enables symmetrical clamping in both polarities without external polarity management, supporting robust protection against ESD, load dump, and inductive switching events.
It meets AEC-Q101 stress testing requirements including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress test (uHAST). The device is rated for 40 A peak forward surge current (IFSM, 8.3 ms half-sine) and exhibits <1 µA reverse leakage at VWM, ensuring minimal standby power loss in always-on automotive subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 58.1 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin below breakdown |
| VBR min/max | 64.6 V / 71.4 V @ 1 mA - Confirmed breakdown threshold range ensures reliable turn-on during transients |
| VC @ IPPM | 92.0 V @ 4.5 A (10/1000 µs) - Clamping voltage limits downstream IC stress during 400 W surge events |
| PPPM | 400 W - Peak pulse power handling capacity per standard 10/1000 µs waveform |
| IR @ VWM | <1 µA - Ultra-low leakage preserves battery life and avoids false triggering in low-power circuits |
| TJ max | +150 °C - Enables operation in under-hood automotive environments without derating |
| Package | DO-214AC (SMA) - Industry-standard SMD footprint compatible with automated placement and reflow |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking for unidirectional variants; P4SMA68CAH is bidirectional and marked with "CPJ" code - no polarity-dependent terminals. Leads are matte tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | No fixed anode/cathode - identical clamping behavior in either direction; eliminates orientation constraints during layout |
| Case | Non-electrical mechanical interface | UL 94V-0 compliant molding compound provides flame resistance and thermal stability up to 150 °C |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use via temperature cycling, HTRB, uHAST, and ESD testing - supports Tier-1 supply chain requirements |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) without degradation |
| Glass passivated junction | Enhances long-term reliability and moisture resistance versus epoxy-passivated alternatives - critical for humid under-hood environments |
| Fast response time | <1.0 ps - Enables clamping before sensitive downstream circuitry experiences overvoltage stress |
| Moisture sensitivity level | MSL Level 1 (per J-STD-020) - No floor life limitation; supports indefinite storage and standard reflow without baking |
Applications
| Automotive On-Board DC/DC Converters | LED Lighting Drivers |
|---|---|
Use Scenario: Protecting 12 V/24 V input stage of buck-based DC/DC modules powering infotainment displays or ADAS sensors. IC Role / Device Role: Bidirectional TVS placed across input rail to clamp load-dump spikes (ISO 7637-2 Pulse 5a) and reverse-battery transients. Use Value: Limits voltage to ≤92.0 V during 400 W surges, preventing damage to controller ICs and MOSFETs while maintaining MSL Level 1 manufacturability. | Use Scenario: Safeguarding constant-current LED driver ICs in headlamp or interior lighting modules exposed to ignition noise and alternator ripple. IC Role / Device Role: Parallel-connected TVS absorbing repetitive 10/1000 µs transients induced by relay switching and motor loads. Use Value: Sub-1 µA leakage at 58.1 V prevents quiescent current drain; 150 °C TJ rating ensures stable operation near hot LED heatsinks. |
| Industrial Power Adapters | Switched-Mode Power Supplies (SMPS) |
Use Scenario: Input-stage surge protection in universal-input AC/DC adapters used in factory automation I/O modules. IC Role / Device Role: Primary-side TVS suppressing line-to-line and line-to-ground surges per IEC 61000-4-5 (Combination Wave 1.2/50 µs & 8/20 µs). Use Value: 400 W peak power rating handles high-energy transients; DO-214AC footprint allows compact PCB layout without through-hole mounting. | Use Scenario: Secondary-side rail protection in telecom-grade SMPS where output voltage regulation must remain stable during ESD events. IC Role / Device Role: Low-capacitance TVS placed across regulated 5 V or 12 V outputs to prevent latch-up in PMICs and microcontrollers. Use Value: 92.0 V clamping voltage provides >3× safety margin above 24 V nominal rails; AEC-Q101 qualification adds reliability assurance beyond industrial grade. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64CA | 600 W PPPM, SMB package (DO-214AA), VWM = 55.1 V, VC = 103 V @ 5.8 A | Higher power rating but larger footprint; less suitable for space-constrained automotive modules | Select when higher surge margin is required and board area permits SMB package |
| 1.5KE68CA | 1500 W PPPM, axial DO-15 package, VWM = 58.1 V, VC = 118 V @ 12.7 A | Through-hole mounting only; incompatible with automated SMT assembly; higher clamping voltage reduces protection margin | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ64CA and 1.5KE68CA, the P4SMA68CAH delivers optimal balance of AEC-Q101 qualification, DO-214AC SMT compatibility, 400 W surge handling, and tight 92.0 V clamping - making it preferred for new automotive and industrial SMT designs requiring production scalability and thermal robustness.
Availability
P4SMA68CAH is available at Aetrix Electronics and suitable for automotive on-board DC/DC converters, LED lighting drivers, and industrial power adapters requiring stable component supply with full traceability and lifecycle support.
Supply support for P4SMA68CAH 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, serving global automotive, industrial, and consumer markets since 1979.
The P4SMA series belongs to TSC's AEC-Q101-qualified TVS portfolio engineered specifically for harsh-environment transient suppression - emphasizing reliability, standardized SMT packaging, and compliance with ISO 7637-2 and IEC 61000-4-5.
FAQ
What does the 'CAH' suffix indicate in P4SMA68CAH?
The 'CAH' suffix denotes a bidirectional configuration with tightened breakdown voltage tolerance (±5% for P4SMA68AH variants) and AEC-Q101 qualification. Unlike unidirectional 'H' versions, P4SMA68CAH provides symmetrical clamping in both polarities - confirmed by identical VBR min/max (64.6 V / 71.4 V) and IR specifications in either direction. This makes P4SMA68CAH ideal for AC-coupled or polarity-agnostic protection circuits.
Is P4SMA68CAH suitable for ISO 7637-2 Pulse 5a (load dump) protection?
P4SMA68CAH is not rated for ISO 7637-2 Pulse 5a (load dump), which requires clamping at ≥35 V and energy handling up to 150 J. Its 400 W rating applies to 10/1000 µs waveforms (Pulse 1/2a/2b/3a/3b). For load dump, higher-energy devices like TSK series or specialized load-dump suppressors are required. P4SMA68CAH remains valid for all other ISO 7637-2 pulses specified in its datasheet.
What is the maximum clamping voltage of P4SMA68CAH under standard test conditions?
The maximum clamping voltage of P4SMA68CAH is 92.0 V, measured at 4.5 A peak impulse current using the 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range (–55 °C to +150 °C) and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Does P4SMA68CAH require special PCB layout considerations due to its bidirectional nature?
No special layout is needed for P4SMA68CAH's bidirectional operation - it has no anode or cathode designation and functions identically regardless of orientation. The DO-214AC (SMA) package uses a symmetrical two-terminal structure marked with "CPJ", eliminating polarity-dependent routing. Standard SMA pad layout per TSC's recommended footprint ensures optimal thermal dissipation and solder joint reliability.
How does the glass passivation in P4SMA68CAH improve long-term reliability?
Glass passivation in P4SMA68CAH forms a hermetic, chemically inert barrier over the silicon junction - significantly reducing moisture ingress and electrochemical migration compared to organic passivants. This directly extends operational life in high-humidity environments (e.g., automotive engine bays) and improves resistance to bias-HAST and temperature cycling stress, contributing to its AEC-Q101 qualification and MSL Level 1 rating.
P4SMA68CAH 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):
- 58.1V
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 92V
- Current - Peak Pulse (10/1000µs):
- 4.5A
- 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)
P4SMA68CAH FAQ
1.How can I place an order for P4SMA68CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA68CAH 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 P4SMA68CAH reliable?
The price and inventory of P4SMA68CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA68CAH is usually 5 days.
3.What payment methods are accepted for P4SMA68CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA68CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA68CAH?
P4SMA68CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA68CAH 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 P4SMA68CAH?
For technical support, including P4SMA68CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA68CAH requirements.
6.How does Aetrix verify that P4SMA68CAH is sourced from the original manufacturer or authorized distributors?
All P4SMA68CAH 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 P4SMA68CAH meets industry standards.
7.What is the process for return or replacement of P4SMA68CAH?
All P4SMA68CAH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA68CAH, 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 P4SMA68CAH part is unused and in its original packaging.
Return procedure for P4SMA68CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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