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Taiwan Semiconductor Corporation P4SMA68CH
- Part No.:
- P4SMA68CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA68CH.pdf
- Description:
- 400W, 68V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:8,283
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Product details
Overview
P4SMA68CH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power (10/1000μs), 68V breakdown voltage (min 61.2V, max 74.8V at 1mA), and clamping voltage of 98.0V at 4.2A. It protects DC/DC converters and automotive power rails against ESD and surge events per ISO 7637-2.
For engineers reviewing the P4SMA68CH datasheet, P4SMA68CH pinout, P4SMA68CH application, or P4SMA68CH equivalent, key selection criteria include its 55.1V working stand-off voltage, <1μA reverse leakage at VWM, AEC-Q101 qualification, and bidirectional capability when ordered as P4SMA68AH - critical for robust automotive and industrial power interface design.
Technical Context
The P4SMA68CH operates as a unidirectional avalanche diode with glass-passivated junction, delivering fast response (<1.0ps) and stable clamping under repetitive transients. Its 150°C maximum junction temperature and -55°C to +150°C operating range support under-hood automotive environments.
Designed for surface-mount assembly on PCBs with standard reflow profiles, it meets J-STD-020 moisture sensitivity level 1 and JESD201 Class 2 whisker resistance. Polarity is marked by cathode band; terminals are matte tin-plated for reliable solderability per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=1mA | 61.2–74.8V - defines minimum and maximum avalanche initiation threshold under standardized test current |
| VWM | 55.1V - maximum continuous reverse voltage before significant leakage begins; sets system operating margin |
| VC @ IPPM=4.2A | 98.0V - clamped voltage during 10/1000μs surge; determines protected circuit's peak stress level |
| PPPM | 400W - peak pulse power handling capacity; defines transient energy absorption capability |
| IR @ VWM | <1μA - ultra-low reverse leakage ensures minimal standby power loss in high-impedance circuits |
| TJ Range | -55°C to +150°C - enables deployment in engine control units, lighting modules, and industrial power supplies |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-diode configuration with cathode band marking. Dimensions conform to JEDEC DO-214AC outline; weight ≈0.060g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional clamp configuration |
| Cathode | Avalanche conduction terminal | Connected to protected line (e.g., 48V rail); conducts during overvoltage to shunt surge current to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock testing |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal stress and humidity exposure |
| Fast response time <1.0ps | Enables suppression of nanosecond-scale ESD events before downstream ICs experience damage |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Complies with automotive transient immunity requirements for battery line and load-dump protection |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive for environmentally compliant manufacturing and end-of-life processing |
Applications
| Automotive Body Control Module (BCM) | Industrial DC/DC Converter Input Stage |
|---|---|
Use Scenario: Protects LIN bus transceivers and microcontroller I/O lines from load dump and jump-start transients in vehicle body electronics. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between LIN line and ground, triggered only during positive overvoltage events. Use Value: Limits voltage seen by transceiver to ≤98.0V during 400W surges, preserving signal integrity and preventing latch-up in 5V-tolerant interfaces. | Use Scenario: Shields primary-side MOSFET gate drivers and controller ICs in 24V-to-5V isolated DC/DC converters used in factory automation. IC Role / Device Role / Timing Role: Standoff protector on input rail; absorbs repetitive switching noise and accidental 100V/1ms surges without degradation. Use Value: Maintains 55.1V working stand-off while clamping to 98.0V, ensuring driver ICs remain within absolute maximum ratings during field operation. |
| LED Driver Power Input | Telecom Power Supply Surge Protection |
Use Scenario: Guards constant-current LED driver ICs against inductive kickback and lightning-induced surges in outdoor street lighting systems. IC Role / Device Role / Timing Role: Primary-level TVS on 48V input bus; placed upstream of bulk capacitor and active rectifier stage. Use Value: Withstands 400W pulses and exhibits <1μA leakage at 55.1V, minimizing standby current draw in always-on lighting applications. | Use Scenario: Integrated into secondary-side 48V telecom power distribution board to meet GR-1089-CORE Level 3 surge immunity requirements. IC Role / Device Role / Timing Role: Secondary-side unidirectional clamp on DC output rail feeding baseband processors and PHY ICs. Use Value: Delivers 98.0V clamping at 4.2A with 0.057%/°C VBR tempco, ensuring stable protection margin across -40°C to +85°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A | Bidirectional variant; 64V VWM, 100V VC @ 4.0A, same DO-214AA package but larger footprint than SMA | Requires PCB layout change due to different pad dimensions and polarity marking; suited for dual-direction surge scenarios | Select SMBJ64A only if bidirectional protection and higher IPPM (4.0A vs 4.2A) are required and board space allows DO-214AA |
| 1.5SMC68A | Same VBR range (61.2–74.8V), but higher PPPM = 1500W, DO-214AB (SMC) package, 1.5x larger footprint | Overqualified for 400W use cases; better suited for high-energy industrial surge zones where PCB area permits | Choose 1.5SMC68A only when legacy designs mandate SMC footprint or when system-level surge testing exceeds 400W compliance limits |
Compared with SMBJ64A and 1.5SMC68A, the P4SMA68CH offers optimal balance of compact DO-214AC footprint, AEC-Q101 qualification, and precise 55.1V stand-off for 48V/60V automotive and industrial rails - making it ideal where space, qualification, and voltage margin are jointly constrained.
Availability
P4SMA68CH is available at Aetrix Electronics and suitable for automotive body electronics, industrial DC/DC converters, LED driver inputs, and telecom power supply surge protection requiring stable component supply and full traceability.
Supply support for P4SMA68CH 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, MOSFETs, and power management devices.
The P4SMA68CH belongs to TSC's AEC-Q101-qualified P4SMAxH series of surface-mount TVS diodes, engineered specifically for automotive and industrial power-line transient suppression with emphasis on low leakage, tight VBR tolerance, and robust surge endurance.
FAQ
What is the maximum clamping voltage of the P4SMA68CH under standard 10/1000μs surge conditions?
The P4SMA68CH has a maximum clamping voltage (VC) of 98.0V at 4.2A peak pulse current (IPPM) under the standardized 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The P4SMA68CH maintains this clamping performance across its full operating temperature range.
Is the P4SMA68CH suitable for automotive applications, and what qualifications does it hold?
Yes, the P4SMA68CH is AEC-Q101 qualified and explicitly designed for automotive use, meeting ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements. Its glass-passivated junction, -55°C to +150°C operating range, and JESD201 Class 2 whisker resistance ensure reliability in under-hood and body-control environments. The P4SMA68CH is commonly deployed in BCMs and lighting modules.
How does the P4SMA68CH differ from the P4SMA68AH variant?
The P4SMA68CH is unidirectional, while the P4SMA68AH is bidirectional - indicated by the "AH" suffix per TSC's ordering convention. Both share identical VBR (61.2–74.8V), VWM (55.1V), and VC (92.0V) specs, but the AH version clamps in both polarities. The P4SMA68CH must be oriented with cathode toward the protected line; the P4SMA68AH eliminates orientation concerns in AC-coupled or floating-rail applications.
What is the reverse leakage current specification for the P4SMA68CH at its working stand-off voltage?
The P4SMA68CH specifies a maximum reverse leakage current (IR) of less than 1μA at its working stand-off voltage (VWM) of 55.1V, measured at 25°C. This ultra-low leakage minimizes quiescent power loss in battery-backed or energy-sensitive systems. The P4SMA68CH maintains sub-5μA leakage even at 125°C, supporting high-reliability thermal designs.
Does the P4SMA68CH require special PCB layout considerations beyond standard SMA footprints?
No - the P4SMA68CH uses the industry-standard DO-214AC (SMA) package with recommended pad layout per TSC's Package Outline Dimensions document. Its cathode band marking aligns with conventional diode polarity conventions. No thermal vias or copper pour extensions are mandatory, though 2–4 thermal vias under the cathode pad improve surge derating above 85°C ambient. The P4SMA68CH is compatible with standard reflow profiles and J-STD-020 Level 1 moisture handling.
P4SMA68CH 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):
- 55.1V
- Voltage - Breakdown (Min):
- 61.2V
- Voltage - Clamping (Max) @ Ipp:
- 98V
- Current - Peak Pulse (10/1000µs):
- 4.2A
- 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)
P4SMA68CH FAQ
1.How can I place an order for P4SMA68CH through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA68CH 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 P4SMA68CH reliable?
The price and inventory of P4SMA68CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA68CH is usually 5 days.
3.What payment methods are accepted for P4SMA68CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA68CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA68CH?
P4SMA68CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA68CH 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 P4SMA68CH?
For technical support, including P4SMA68CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA68CH requirements.
6.How does Aetrix verify that P4SMA68CH is sourced from the original manufacturer or authorized distributors?
All P4SMA68CH 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 P4SMA68CH meets industry standards.
7.What is the process for return or replacement of P4SMA68CH?
All P4SMA68CH units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA68CH, 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 P4SMA68CH part is unused and in its original packaging.
Return procedure for P4SMA68CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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