My Inquiry
My Account
Taiwan Semiconductor Corporation P4SMA6.8A
- Part No.:
- P4SMA6.8A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA6.8A.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,475
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
P4SMA6.8A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping fast transients in DC power rails. It features a 6.46–7.14 V breakdown voltage at 10 mA, 5.80 V working stand-off voltage, 10.5 V maximum clamping voltage at 40 A peak pulse current, and 400 W peak pulse power rating per 10/1000 µs waveform - deployed in switching mode power supplies and on-board DC/DC converters.
For engineers reviewing the P4SMA6.8A datasheet, P4SMA6.8A pinout, P4SMA6.8A application, or P4SMA6.8A equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD, leakage current at operating voltage, thermal derating above 25°C, and compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive electronics.
Technical Context
The P4SMA6.8A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR range (6.46–7.14 V). Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1000 µA at 5.80 V), while sub-1 ps response time enables suppression of ESD and fast-switching noise transients before downstream components are stressed.
It is rated for 400 W peak pulse power under 10/1000 µs waveform, with thermal derating above 25°C per Fig.2, and supports continuous operation from –55°C to +150°C junction temperature. The device meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for the molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=10 mA | 6.46–7.14 V: Ensures reliable turn-on before overvoltage damages 5 V or 6 V logic rails |
| VWM | 5.80 V: Maximum continuous reverse voltage without significant leakage; compatible with 5 V systems |
| VC @ IPPM=40 A | 10.5 V: Clamped voltage during 400 W surge; provides ≥1.5 V margin above 5 V rail |
| IR @ VWM | <1000 µA: Low standby leakage preserves battery life in always-on circuits |
| PPPM | 400 W (10/1000 µs): Handles automotive load-dump and inductive switch-off energy |
| TJ Range | –55°C to +150°C: Supports under-hood and industrial ambient conditions |
| Package | DO-214AC (SMA): Standard SMT footprint; compatible with automated placement and reflow |
Pinout & Package
DO-214AC (SMA) surface-mount package with cathode band marking. Matte tin-plated leads meet J-STD-002 solderability; polarity is unidirectional, with cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in uni-directional clamp configuration |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to protected line (e.g., 5 V rail); conducts only during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Stable VBR tolerance and long-term reliability under thermal cycling |
| Sub-1 ps response time | Clamps ESD and fast edge-induced transients before propagation into IC inputs |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive power-line immunity testing without external filtering |
| Moisture sensitivity level 1 | No floor-life limitation or baking required prior to reflow assembly |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU |
Applications
| Switching Mode Power Supply (SMPS) | On-Board DC/DC Converter |
|---|---|
Use Scenario: Input-side transient protection on 5 V or 12 V SMPS front-end against line surges and coupling noise. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between input rail and ground, absorbing energy before it reaches PWM controller or MOSFET gate driver. Use Value: Limits voltage excursion to ≤10.5 V during 400 W pulses, preventing latch-up or gate oxide damage in primary-side control ICs. | Use Scenario: Output rail protection in point-of-load (POL) converters powering FPGAs or microcontrollers. IC Role / Device Role / Timing Role: Secondary-side clamping device across regulated output, activated only during overvoltage faults (e.g., feedback loop failure). Use Value: Maintains system-level safety by holding output below 11 V even during 40 A surge, avoiding brownout or reset instability in digital loads. |
| Lighting Application | Adapters |
Use Scenario: Surge suppression in LED driver modules exposed to mains-coupled transients or hot-plug events. IC Role / Device Role / Timing Role: Standoff-rated TVS on constant-current output path, shunting overvoltage spikes induced by inductive LED string switching. Use Value: Enables robust Class II lighting designs with <1000 µA leakage at 5.8 V, minimizing standby power loss in energy-efficient fixtures. | Use Scenario: Input-stage protection in wall-mounted AC/DC adapters for consumer electronics. IC Role / Device Role / Timing Role: First-line defense against differential-mode surges entering via rectified DC bus, placed upstream of bulk capacitor. Use Value: Withstands 40 A peak impulse without degradation, extending adapter lifetime in regions with unstable grid voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8A (Bourns) | Same DO-214AA package; 600 W rating; slightly higher VC = 11.2 V at 35 A | Higher power handling but larger footprint; less suitable for space-constrained SMA layouts | Select SMBJ6.8A only if >400 W surge margin is required and PCB area allows DO-214AA |
| 1.5SMC6.8A (ON Semiconductor) | DO-214AB (SMC) package; 600 W rating; VC = 11.0 V at 36.4 A; higher thermal mass | Requires larger pad layout; better for high-repetition surges but incompatible with SMA land pattern | Choose 1.5SMC6.8A when board-level thermal management prioritizes sustained pulse handling over miniaturization |
Compared with SMBJ6.8A and 1.5SMC6.8A, the P4SMA6.8A offers optimal balance of 400 W capability, DO-214AC footprint compatibility, and 10.5 V clamping - making it preferred for compact, cost-sensitive 5 V rail protection where strict layout reuse is required.
Availability
P4SMA6.8A is available at Aetrix Electronics and suitable for switching mode power supplies, on-board DC/DC converters, and lighting applications requiring stable component supply, consistent parametric performance, and full traceability from wafer to shipment.
Supply support for P4SMA6.8A 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 Company (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 P4SMA6.8A belongs to TSC's P4SMA series of surface-mount TVS diodes, engineered specifically for high-reliability, high-volume industrial and automotive power-rail protection with stringent ISO 7637-2 compliance and moisture-insensitive packaging.
FAQ
What is the breakdown voltage range of the P4SMA6.8A?
The P4SMA6.8A has a guaranteed breakdown voltage (VBR) range of 6.46 V to 7.14 V at 10 mA test current, measured per ANSI/IEEE C62.35. This tight tolerance ensures predictable turn-on behavior in 5 V systems and avoids premature conduction during normal operation. The P4SMA6.8A maintains this specification across its full operating temperature range.
Is the P4SMA6.8A unidirectional or bidirectional?
The P4SMA6.8A is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix and confirmed by its single cathode band marking. It conducts only in reverse bias during overvoltage events and blocks forward current up to 3.5 V at 25 A. For bidirectional protection, engineers must select P4SMA6.8CA instead of the P4SMA6.8A.
What is the maximum clamping voltage of the P4SMA6.8A under surge conditions?
The P4SMA6.8A exhibits a maximum clamping voltage (VC) of 10.5 V when subjected to a 10/1000 µs surge waveform with 40 A peak current. This value is measured at TA = 25°C and defines the upper voltage limit imposed on the protected circuit during worst-case transient events. The P4SMA6.8A's 10.5 V clamping ensures safe operation for 5 V logic interfaces with adequate margin.
Does the P4SMA6.8A meet automotive transient immunity standards?
Yes, the P4SMA6.8A is explicitly rated to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test waveforms - covering common automotive electrical disturbances including load dump, supply interruption, and coupled transients. This compliance is documented in Taiwan Semiconductor's official datasheet Version S2102 and verified per standard test conditions, confirming suitability for automotive body electronics and infotainment power rails.
What is the moisture sensitivity level (MSL) of the P4SMA6.8A?
The P4SMA6.8A has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it is not humidity-sensitive and may be stored indefinitely at ambient conditions without baking or dry-pack requirements. This eliminates floor-life constraints and simplifies SMT manufacturing flow - a key advantage for high-throughput assembly of the P4SMA6.8A in DO-214AC tape-and-reel format.
P4SMA6.8A 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:
- 1
- Bidirectional Channels:
- -
- 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)
P4SMA6.8A FAQ
1.How can I place an order for P4SMA6.8A through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA6.8A 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 P4SMA6.8A reliable?
The price and inventory of P4SMA6.8A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA6.8A is usually 5 days.
3.What payment methods are accepted for P4SMA6.8A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA6.8A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA6.8A?
P4SMA6.8A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA6.8A 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 P4SMA6.8A?
For technical support, including P4SMA6.8A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA6.8A requirements.
6.How does Aetrix verify that P4SMA6.8A is sourced from the original manufacturer or authorized distributors?
All P4SMA6.8A 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 P4SMA6.8A meets industry standards.
7.What is the process for return or replacement of P4SMA6.8A?
All P4SMA6.8A units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA6.8A, 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 P4SMA6.8A part is unused and in its original packaging.
Return procedure for P4SMA6.8A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA6.8A 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
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
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…
