My Inquiry
My Account
Taiwan Semiconductor Corporation P4SMA6.8CA
- Part No.:
- P4SMA6.8CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA6.8CA.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,534
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA6.8CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for surge protection in low-voltage DC power rails. It features a 6.8V nominal breakdown voltage (6.46–7.14V), 5.80V working stand-off voltage, 1000µA max reverse leakage at VWM, 10.5V clamping voltage at 40A peak pulse current, and 400W peak pulse power rating per 10/1000µs waveform.
For engineers reviewing the P4SMA6.8CA datasheet, P4SMA6.8CA pinout, P4SMA6.8CA application, or P4SMA6.8CA equivalent, key selection criteria include bidirectional clamping capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, and suitability for compact SMPS input-stage protection where space-constrained PCB layout demands SMA footprint compatibility.
Technical Context
The P4SMA6.8CA implements a glass-passivated silicon junction optimized for fast transient suppression in automotive and industrial DC systems. Its bidirectional configuration enables symmetrical clamping across both polarities without external polarity management, and its 150°C maximum junction temperature supports operation in thermally demanding environments such as on-board DC/DC converters near power inductors.
Designed to meet ISO 7637-2 test pulses, the device delivers stable clamping performance under repetitive surge stress while maintaining <1µA leakage above 10V - critical for preserving battery-backed or low-quiescent-current circuits. The DO-214AC package ensures compatibility with standard SMT reflow profiles and automated placement equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 6.46V / 7.14V at 10mA - defines guaranteed conduction onset window for reliable overvoltage triggering |
| VWM | 5.80V - maximum continuous reverse voltage before significant leakage begins; sets safe operating margin below system rail |
| IR @ VWM | <1000µA - ensures minimal standby power loss in always-on circuits like automotive ECU keep-alive paths |
| VC @ IPPM | 10.5V at 40A (10/1000µs) - limits downstream IC voltage exposure during surge events |
| PPPM | 400W - peak surge energy handling capacity compatible with ISO 7637-2 Pulse 1 (inductive load dump) |
| TJ max | +150°C - enables use in under-hood automotive modules and high-temperature industrial enclosures |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with 7,500 pcs/reel tape-and-reel packaging |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (bidirectional operation uses symmetric marking; no functional anode/cathode distinction). Weight: 0.060g. Meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Cathode Band Side) | Transient return path (bidirectional) | Functions identically as cathode during negative transients; bidirectional symmetry eliminates orientation sensitivity during placement |
| Cathode (Cathode Band Side) | Transient return path (bidirectional) | Same terminal serves as clamping node for both polarities; cathode band marks reference terminal for mechanical alignment only |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| <1.0ps response time | Clamps ESD and fast transients before sensitive logic or analog circuitry sustains damage |
| ISO 7637-2 compliance | Validated for automotive load-dump and supply-line transient immunity testing (Pulse 1/2a/2b/3a/3b) |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; compatible with standard SMT assembly lines without dry-pack handling |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS Directive for environmentally compliant manufacturing and end-of-life processing |
Applications
| Switching Mode Power Supply (SMPS) | Automotive On-Board DC/DC Converter |
|---|---|
Use Scenario: Input stage of 12V-to-5V isolated flyback converter subjected to load-dump transients in vehicle battery systems. IC Role / Device Role / Timing Role: Bidirectional TVS clamping element placed across primary-side input capacitor to limit surge voltage to ≤10.5V. Use Value: Prevents MOSFET gate oxide rupture and controller IC latch-up during ISO 7637-2 Pulse 1 events without requiring additional series impedance. | Use Scenario: Protection of 24V-to-3.3V buck regulator powering ADAS camera module in parking-assist ECU. IC Role / Device Role / Timing Role: Primary surge shunt device located at DC/DC input filter, clamping transients before input ceramic capacitors. Use Value: Maintains regulated output stability during repeated 10/1000µs surges up to 400W, enabling uninterrupted image sensor operation. |
| LED Driver Power Input | Industrial AC-DC Adapter Output |
Use Scenario: Constant-current LED driver board powered from 24V industrial bus, exposed to switching noise and cable discharge events. IC Role / Device Role / Timing Role: Low-leakage (≤1000µA) TVS placed across input bulk capacitor to suppress 100ns–1µs spikes without affecting quiescent current budget. Use Value: Eliminates false triggering of LED dimming control ICs caused by transient-induced voltage overshoot on VIN. | Use Scenario: Secondary-side output of universal-input 12V/2A wall adapter used in IoT gateway devices. IC Role / Device Role / Timing Role: Output-rail protector against reverse-polarity misconnection and hot-plug inrush-induced ringing. Use Value: Clamps output to ≤10.5V during 40A surge, preventing damage to USB-PD controller and Ethernet PHY ICs downstream. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8CA | Higher PPPM = 600W; larger DO-214AA (SMB) package; 11.2V VC @ 53.3A | Better suited for higher-energy surges but requires larger PCB area and different pad layout | Select SMBJ6.8CA when system-level testing exceeds 400W surge requirements or when thermal derating margin is critical |
| 1.5SMC6.8CA | Same 400W rating but in larger DO-214AB (SMC) package; 10.5V VC @ 38.1A; higher IFSM = 100A | Offers superior surge repetition capability and lower thermal resistance, but incompatible with SMA footprint | Choose 1.5SMC6.8CA for high-cycle-count industrial motor drives where long-term reliability under repeated transients is prioritized |
Compared with SMBJ6.8CA and 1.5SMC6.8CA, the P4SMA6.8CA provides identical clamping voltage and tighter VBR tolerance in the smallest standardized surface-mount TVS package, making it optimal for space-constrained designs where 400W surge immunity suffices and layout reuse of SMA footprints is required.
Availability
P4SMA6.8CA is available at Aetrix Electronics and suitable for switching mode power supplies, automotive DC/DC converters, and LED lighting applications requiring stable component supply with full traceability and lifecycle continuity.
Supply support for P4SMA6.8CA 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, rectifiers, and MOSFETs, with global distribution and AEC-Q200 qualified product lines.
The P4SMA series belongs to TSC's surface-mount TVS portfolio engineered specifically for automotive-grade transient immunity and industrial power rail protection, emphasizing robustness, tight parametric control, and seamless SMT integration.
FAQ
What is the polarity configuration of the P4SMA6.8CA?
The P4SMA6.8CA is a bidirectional TVS diode, meaning it clamps transients of either polarity symmetrically across its terminals. Unlike unidirectional variants (e.g., P4SMA6.8A), the "CA" suffix explicitly denotes bidirectional functionality - confirmed by electrical specifications applying "in both directions" and absence of directional leakage asymmetry in datasheet tables. This makes P4SMA6.8CA ideal for AC-coupled or floating-rail protection where polarity cannot be assumed.
Does the P4SMA6.8CA meet automotive surge immunity standards?
Yes, the P4SMA6.8CA meets ISO 7637-2 Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) requirements as stated in the official Taiwan Semiconductor datasheet. Its 400W peak pulse power rating, 10.5V clamping voltage at 40A, and sub-1ps response time are validated under these waveforms, supporting direct use in automotive body control modules, infotainment power supplies, and ADAS subsystems.
What is the maximum clamping voltage of the P4SMA6.8CA under surge conditions?
The maximum clamping voltage (VC) of the P4SMA6.8CA is 10.5V at 40A peak pulse current using the standardized 10/1000µs double-exponential waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper bound of voltage seen by downstream circuitry during worst-case surge events - critical for ensuring protected ICs remain within absolute maximum ratings.
Can the P4SMA6.8CA be used in place of a unidirectional P4SMA6.8A?
No - the P4SMA6.8CA and P4SMA6.8A are not interchangeable without circuit review. While both share identical VBR, VWM, and VC values, the P4SMA6.8CA is bidirectional and exhibits matched clamping in both directions, whereas the P4SMA6.8A is unidirectional and conducts only in reverse bias. Substituting P4SMA6.8CA for P4SMA6.8A may cause unintended forward conduction in DC-biased rails, risking latch-up or excessive leakage.
What is the moisture sensitivity level (MSL) and reflow profile compatibility for the P4SMA6.8CA?
The P4SMA6.8CA has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it is not moisture-sensitive and requires no baking or dry-pack handling before SMT reflow. It is fully compatible with standard lead-free (SnAgCu) reflow profiles, including peak temperatures up to 260°C, due to its UL 94V-0 molding compound and matte tin-plated leads compliant with J-STD-002 solderability requirements.
P4SMA6.8CA 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):
- 5.8V
- Voltage - Breakdown (Min):
- 6.46V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 40A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA6.8CA FAQ
1.How can I place an order for P4SMA6.8CA through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA6.8CA 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 P4SMA6.8CA reliable?
The price and inventory of P4SMA6.8CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA6.8CA is usually 5 days.
3.What payment methods are accepted for P4SMA6.8CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA6.8CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA6.8CA?
P4SMA6.8CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA6.8CA 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 P4SMA6.8CA?
For technical support, including P4SMA6.8CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA6.8CA requirements.
6.How does Aetrix verify that P4SMA6.8CA is sourced from the original manufacturer or authorized distributors?
All P4SMA6.8CA 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 P4SMA6.8CA meets industry standards.
7.What is the process for return or replacement of P4SMA6.8CA?
All P4SMA6.8CA units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA6.8CA, 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 P4SMA6.8CA part is unused and in its original packaging.
Return procedure for P4SMA6.8CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA6.8CA Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
