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Vishay General Semiconductor - Diodes Division TPSMA6.8AHM3_B/H
- Part No.:
- TPSMA6.8AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
TPSMA6.8AHM3_B/H.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,733
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Product details
Overview
TPSMA6.8AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features 6.8 V breakdown voltage (VBR), 400 W peak pulse power (10/1000 µs), 10.5 V maximum clamping voltage at 38.1 A peak current, and operates up to +185 °C junction temperature - ideal for automotive ECUs and industrial sensor protection.
For engineers reviewing the TPSMA6.8AHM3_B/H datasheet, TPSMA6.8AHM3_B/H pinout, TPSMA6.8AHM3_B/H application, or TPSMA6.8AHM3_B/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, MSL Level 1 solderability, 5.8 V stand-off voltage, and low incremental surge resistance for robust ESD/lightning surge immunity in compact PCB layouts.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology optimized for high-temperature stability and fast response (<1 ns), enabling reliable clamping of inductive switching spikes and lightning-induced surges before downstream ICs or MOSFETs are damaged. Its 185 °C maximum junction temperature supports under-hood automotive use without derating penalties.
The device delivers 400 W peak pulse power with 10/1000 µs waveform at 0.01 % duty cycle, and exhibits 3.5 V maximum forward voltage at 25 A, ensuring minimal conduction loss during surge events. Its cathode-band-marked SMA package meets UL 94 V-0 flammability and JESD 201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 6.45 / 6.80 / 7.14 V at 10 mA - defines precise voltage threshold where clamping initiates under controlled test conditions |
| VWM | 5.8 V - maximum continuous reverse operating voltage before leakage exceeds 300 µA at 25 °C |
| VC @ IPPM | 10.5 V at 38.1 A - clamped voltage seen by protected circuit during full 400 W surge event |
| PPPM | 400 W (10/1000 µs) - peak transient energy absorption capability without failure |
| TJ max. | +185 °C - enables operation in high-ambient environments like engine control modules or industrial motor drives |
| Polarity | Unidirectional - protects against positive-going transients only; requires correct cathode orientation in circuit |
| Package | SMA (DO-214AC) - surface-mount footprint with 0.208" x 0.157" body, compatible with standard reflow profiles (MSL Level 1, 260 °C peak) |
Pinout & Package
SMA (DO-214AC) package with axial leads: cathode marked by black band; anode and cathode terminals are non-polarized in layout but functionally asymmetric - cathode connects to protected line, anode to ground or lower potential reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient clamp node | Connected to line being protected; conducts surge current to ground when voltage exceeds VBR |
| Anode | Reference return path | Typically tied to system ground or low-impedance return; completes clamping current path during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors per stress test requirements |
| Halogen-free & RoHS-compliant | Meets global environmental compliance mandates without compromising thermal or electrical performance |
| 185 °C junction rating | Eliminates need for thermal derating in high-ambient designs such as under-hood power supplies or industrial inverters |
| Low clamping ratio (VC/VBR ≈ 1.54) | Minimizes overvoltage stress on downstream components during transient events |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow processing without baking or special handling |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed microcontroller power inputs in vehicle body control modules from load-dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between VIN and GND to clamp transients above 5.8 V. Use Value: Withstands 400 W surges while limiting clamped voltage to 10.5 V, preserving MCU functionality during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding analog output lines (e.g., 4–20 mA current loop) of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: TVS placed across signal and return lines to absorb ESD and inductive kickback from nearby solenoids. Use Value: Fast <1 ns response and low 300 µA leakage at 5.8 V prevent signal distortion while maintaining accuracy in precision measurement circuits. |
| Consumer Device USB Port Protection | Telecom Base Station DC Power Input |
Use Scenario: Adding secondary surge protection on VBUS line of USB-C ports in smart home hubs exposed to external power adapters. IC Role / Device Role / Timing Role: Standoff-rated TVS in series with primary protection to handle residual transients after upstream MOV/GDT suppression. Use Value: 5.8 V VWM ensures no interference with 5 V nominal operation; 10.5 V VC prevents damage to USB PD controllers during hot-plug surges. |
Use Scenario: Front-end protection of -48 V DC telecom power inputs against lightning-induced common-mode surges entering via outdoor cabling. IC Role / Device Role / Timing Role: Unidirectional TVS configured from -48 V rail to chassis ground to clamp positive excursions. Use Value: 40 A IFSM and 400 W PPPM support repeated surge exposure per ITU-T K.20/21 standards without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.8A | Same SMA package, 6.8 V VBR, but rated for 400 W with 8.3 ms half-sine waveform (not 10/1000 µs); lower clamping voltage (11.5 V @ 33.5 A) | Limited to lower-frequency surge events; not AEC-Q101 qualified | Select SMAJ6.8A only for cost-sensitive industrial applications where automotive qualification is unnecessary |
| 1.5SMC6.8A | Higher-power SMC package (1500 W), same 6.8 V VBR, but larger footprint (7.11 mm × 6.22 mm) and higher VC (13.4 V @ 112 A) | Used where higher single-event energy must be absorbed; unsuitable for space-constrained automotive PCBs | Choose 1.5SMC6.8A when system-level testing requires >400 W surge margin and board area permits larger package |
Compared with SMAJ6.8A and 1.5SMC6.8A, the TPSMA6.8AHM3_B/H provides AEC-Q101 qualification, tighter VC (10.5 V), and MSL Level 1 compatibility - making it the preferred choice for automotive and high-reliability industrial designs requiring validated long-term performance in compact layouts.
Availability
TPSMA6.8AHM3_B/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power input stages requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for TPSMA6.8AHM3_B/H 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 diodes, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, thermal performance, and automotive-grade qualification.
The TPSMA6.8AHM3_B/H belongs to Vishay's PAR® (Precision Avalanche Rectifier) TVS family, engineered specifically for high-temperature, high-reliability transient suppression in automotive and industrial environments where sustained 185 °C operation and AEC-Q101 compliance are mandatory.
FAQ
What is the exact breakdown voltage tolerance for TPSMA6.8AHM3_B/H?
The TPSMA6.8AHM3_B/H has a specified breakdown voltage range of 6.45 V (min) to 7.14 V (max) at 10 mA test current, with 6.80 V nominal. This ±5 % tolerance ensures consistent clamping behavior across production lots and supports predictable circuit protection design without over-engineering margins.
Is TPSMA6.8AHM3_B/H AEC-Q101 qualified and what does that cover?
Yes, TPSMA6.8AHM3_B/H is AEC-Q101 qualified - verified per stress tests including HTGB, HTRB, TCT, AC/DC life test, and ESD (HBM ≥ 8 kV). The HM3 suffix explicitly denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction, making TPSMA6.8AHM3_B/H suitable for automotive powertrain and chassis applications.
What is the maximum clamping voltage of TPSMA6.8AHM3_B/H and at what current is it measured?
The maximum clamping voltage of TPSMA6.8AHM3_B/H is 10.5 V, measured at 38.1 A peak pulse current using the standardized 10/1000 µs waveform. This value reflects worst-case voltage seen by protected circuitry during a full-rated 400 W transient event, critical for validating downstream IC voltage tolerances.
Does TPSMA6.8AHM3_B/H have a unidirectional or bidirectional configuration?
TPSMA6.8AHM3_B/H is strictly unidirectional - it clamps only positive-going transients from cathode to anode. The device features a cathode band marking and must be oriented with cathode toward the line being protected and anode toward ground or reference potential. Bidirectional variants are not offered in this family.
What is the thermal performance limit of TPSMA6.8AHM3_B/H and how does it affect PCB layout?
TPSMA6.8AHM3_B/H supports a maximum junction temperature of +185 °C, allowing uninterrupted operation in high-ambient environments. To maintain this rating, the datasheet specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - underscoring the need for adequate thermal copper area in PCB layout to avoid premature thermal shutdown or parametric drift.
TPSMA6.8AHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- PAR®
- 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 ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
TPSMA6.8AHM3_B/H FAQ
1.How can I place an order for TPSMA6.8AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMA6.8AHM3_B/H 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 TPSMA6.8AHM3_B/H reliable?
The price and inventory of TPSMA6.8AHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMA6.8AHM3_B/H is usually 5 days.
3.What payment methods are accepted for TPSMA6.8AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMA6.8AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMA6.8AHM3_B/H?
TPSMA6.8AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMA6.8AHM3_B/H 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 TPSMA6.8AHM3_B/H?
For technical support, including TPSMA6.8AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMA6.8AHM3_B/H requirements.
6.How does Aetrix verify that TPSMA6.8AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All TPSMA6.8AHM3_B/H 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 TPSMA6.8AHM3_B/H meets industry standards.
7.What is the process for return or replacement of TPSMA6.8AHM3_B/H?
All TPSMA6.8AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMA6.8AHM3_B/H, 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 TPSMA6.8AHM3_B/H part is unused and in its original packaging.
Return procedure for TPSMA6.8AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMA6.8AHM3_B/H Tags
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