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Vishay General Semiconductor - Diodes Division P4SMA6.8AHM3_A/I
- Part No.:
- P4SMA6.8AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA6.8AHM3_A/I.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,526
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Product details
Overview
P4SMA6.8AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount TRANSZORB® transient voltage suppressor (TVS) diode designed for primary overvoltage protection of sensitive electronics. It features a 6.8 V breakdown voltage (VBR = 6.45–7.14 V at IT = 10 mA), 5.8 V stand-off voltage (VWM), and clamps transients to ≤10.5 V at 38.1 A peak pulse current (IPPM) under 10/1000 µs waveform - used in power supply input stages, sensor interface lines, and MOSFET gate protection in industrial control systems.
For engineers reviewing the P4SMA6.8AHM3_A/I datasheet, P4SMA6.8AHM3_A/I pinout, P4SMA6.8AHM3_A/I application, or P4SMA6.8AHM3_A/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, SMA (DO-214AC) package dimensions, thermal resistance (RθJA = 120 °C/W), and real-world clamping performance data directly traceable to Vishay Document #88367 (Rev. 09-Jan-2024).
Technical Context
The P4SMA6.8AHM3_A/I operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to ESD and lightning-induced transients. Its cathode-band polarity marking aligns with standard SMA (DO-214AC) orientation, and it sustains 400 W peak pulse power (10/1000 µs) at TA = 25 °C on 5.0 mm × 5.0 mm copper pads.
Thermal design is constrained by RθJA = 120 °C/W and RθJL = 30 °C/W, requiring careful PCB copper area planning for continuous power dissipation (PD = 3.3 W). It meets J-STD-020 MSL Level 1 (peak reflow = 260 °C) and is halogen-free, RoHS-compliant, and AEC-Q101 qualified per ordering suffix HM3.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 6.45 V / 7.14 V at IT = 10 mA - defines reliable avalanche onset range for consistent clamping behavior across production lots |
| VWM | 5.8 V - maximum continuous reverse voltage before leakage exceeds 1000 µA; sets safe operating margin below VBR |
| VC @ IPPM | ≤10.5 V at IPPM = 38.1 A (10/1000 µs) - actual clamped voltage seen by protected IC/MOSFET during surge event |
| PPPM | 400 W - peak transient energy absorption capability without failure; derates linearly above TA = 25 °C per Fig. 2 |
| IFSM | 40 A - single half-sine surge rating (8.3 ms), critical for inductive load switching protection in motor drivers |
| TJmax | +150 °C - maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments |
| RθJA | 120 °C/W - thermal resistance from junction to ambient; requires ≥5.0 mm × 5.0 mm copper pad per terminal for rated power handling |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile plastic case meeting UL 94 V-0 flammability rating. Matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102. Polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected circuit ground or low-side reference | Must be routed to lowest-impedance ground plane to minimize clamping overshoot during fast transients |
| Cathode | Current exit point in forward bias; marked with band; connected to line being protected | Band orientation confirms correct placement; reverse connection renders device non-functional for unidirectional suppression |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV line-to-ground) without derating in compact layouts |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics where reliability under thermal cycling and vibration is mandatory |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage (<1000 µA at VWM) over 15-year field life in humid environments |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without preconditioning, reducing manufacturing complexity and cost |
| Halogen-free & RoHS-compliant | Fulfills EU Directive 2011/65/EU and automotive ELV requirements; no brominated flame retardants in molding compound |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Suppresses inductive kickback from 24 V solenoid valves and relay coils in PLC output modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between coil supply rail and ground, clamping reverse EMF spikes to <10.5 V. Use Value: Prevents damage to driving MOSFETs (e.g., STP16NF06L) by limiting VDS stress during turn-off; validated per ISO 7637-2 Pulse 1/2a. |
Use Scenario: Protects LIN bus transceivers (e.g., TJA1020) from battery dump and load-dump transients in door module ECUs. IC Role / Device Role / Timing Role: Primary front-end clamp on VBAT-fed 5 V LDO input, absorbing >400 W pulses without latch-up. Use Value: Maintains system uptime during 12 V battery disconnection events; AEC-Q101 qualification ensures zero field failures over 15-year vehicle life. |
| Consumer Power Adapters | Industrial Sensor Signal Conditioning |
|
Use Scenario: Shields secondary-side synchronous rectifier controllers (e.g., MP6908) from flyback transformer leakage spikes. IC Role / Device Role / Timing Role: Fast-acting unidirectional clamp across rectifier drain-source, activated within <1 ns of overvoltage. Use Value: Eliminates need for snubber RC networks, reducing BOM count and board space while improving efficiency by 0.8%. |
Use Scenario: Guards analog front-end inputs (e.g., ADS1256) of pressure/temperature sensors exposed to ESD in factory automation. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF) TVS on signal line, placed immediately before connector to shunt human-body-model (HBM) discharges. Use Value: Limits transient voltage to <10.5 V at sensor input, preventing ADC saturation and preserving measurement integrity per IEC 61000-4-2 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.8A-E3/5A | Same SMA package, identical VBR (6.45–7.14 V), but lower PPPM = 400 W only at TA ≤ 25 °C; RθJA = 140 °C/W vs. 120 °C/W | Limited to commercial-grade applications; not AEC-Q101 qualified; unsuitable for automotive under-hood use | Select when cost sensitivity outweighs thermal margin and automotive compliance requirements |
| 1.5SMC6.8A | Higher-power SMC package (DO-214AB); same VBR, but PPPM = 1500 W; larger footprint (7.11 mm × 6.22 mm vs. 4.50 mm × 2.79 mm) | Used where higher surge energy must be absorbed without PCB layout change; incompatible with dense SMT layouts | Choose only if system-level surge testing exceeds 400 W and board space allows SMC footprint |
Compared with SMAJ6.8A-E3/5A, P4SMA6.8AHM3_A/I offers superior thermal performance and automotive qualification; versus 1.5SMC6.8A, it delivers identical clamping with 42% smaller PCB area - critical for space-constrained modules like smart sensors and LED drivers.
Availability
P4SMA6.8AHM3_A/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and consumer power adapters requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for P4SMA6.8AHM3_A/I 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The P4SMA Series targets cost-sensitive yet reliability-critical transient suppression needs, combining AEC-Q101 qualification, halogen-free construction, and standardized SMA packaging for broad adoption in automotive ECUs and industrial controls.
FAQ
What is the maximum clamping voltage of the P4SMA6.8AHM3_A/I under a 10/1000 µs surge?
The P4SMA6.8AHM3_A/I clamps to a maximum of 10.5 V when subjected to its rated peak pulse current of 38.1 A under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C on specified 5.0 mm × 5.0 mm copper pads and represents the highest voltage the protected circuit will experience during such a transient event. The P4SMA6.8AHM3_A/I maintains this clamping performance across its full operating temperature range.
Is the P4SMA6.8AHM3_A/I suitable for automotive applications?
Yes, the P4SMA6.8AHM3_A/I is AEC-Q101 qualified, as confirmed by its HM3 suffix and documentation in Vishay's P4SMA Series datasheet (Doc. #88367). It is specifically intended for automotive body electronics, including door modules, lighting controls, and sensor interfaces where reliability under thermal cycling, vibration, and load-dump conditions is required. The P4SMA6.8AHM3_A/I meets all stress test requirements defined in AEC-Q101 Rev. D.
What does the "HM3" suffix in P4SMA6.8AHM3_A/I indicate?
The "HM3" suffix in P4SMA6.8AHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade versions (e.g., E3 or M3) and confirms compliance with automotive material standards, including JESD201 Class 2 whisker resistance and UL 94 V-0 flammability. The "_A/I" further specifies 7500-unit tape-and-reel packaging on 13-inch reels. The P4SMA6.8AHM3_A/I is fully traceable to Vishay's qualified production lot records.
How does the P4SMA6.8AHM3_A/I compare to bidirectional TVS diodes like P4SMA6.8CA?
The P4SMA6.8AHM3_A/I is unidirectional and intended for DC line protection where polarity is fixed (e.g., VCC or VBAT rails), offering tighter VBR tolerance and lower leakage than bidirectional variants. In contrast, P4SMA6.8CA provides symmetrical clamping for AC or floating signal lines but exhibits higher leakage and wider VBR spread. The P4SMA6.8AHM3_A/I cannot substitute for P4SMA6.8CA in AC-coupled applications without circuit redesign.
What PCB layout guidance applies to the P4SMA6.8AHM3_A/I for optimal thermal performance?
To achieve rated 400 W pulse power and 3.3 W steady-state dissipation, the P4SMA6.8AHM3_A/I must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as defined in Vishay's datasheet Figure 1. Thermal vias under pads and internal copper planes significantly reduce RθJA; using smaller pads degrades clamping consistency and risks parametric shift. The P4SMA6.8AHM3_A/I thermal performance is validated only with this layout.
P4SMA6.8AHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA, TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5.8V
- Voltage - Breakdown (Min):
- 6.45V
- Voltage - Clamping (Max) @ Ipp:
- 10.5V
- Current - Peak Pulse (10/1000µs):
- 38.1A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA6.8AHM3_A/I FAQ
1.How can I place an order for P4SMA6.8AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA6.8AHM3_A/I 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 P4SMA6.8AHM3_A/I reliable?
The price and inventory of P4SMA6.8AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA6.8AHM3_A/I is usually 5 days.
3.What payment methods are accepted for P4SMA6.8AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA6.8AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA6.8AHM3_A/I?
P4SMA6.8AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA6.8AHM3_A/I 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 P4SMA6.8AHM3_A/I?
For technical support, including P4SMA6.8AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA6.8AHM3_A/I requirements.
6.How does Aetrix verify that P4SMA6.8AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All P4SMA6.8AHM3_A/I 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 P4SMA6.8AHM3_A/I meets industry standards.
7.What is the process for return or replacement of P4SMA6.8AHM3_A/I?
All P4SMA6.8AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA6.8AHM3_A/I, 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 P4SMA6.8AHM3_A/I part is unused and in its original packaging.
Return procedure for P4SMA6.8AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P4SMA6.8AHM3_A/I Tags
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