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Vishay General Semiconductor - Diodes Division TPSMB6.8AHE3_A/H
- Part No.:
- TPSMB6.8AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
TPSMB6.8AHE3_A/H.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,460
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Product details
Overview
TPSMB6.8AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount PAR® transient voltage suppressor (TVS) designed for clamping inductive switching transients and lightning-induced surges on power rails and signal lines. It delivers 600 W peak pulse power (10/1000 μs), has a 6.8 V breakdown voltage (VBR = 6.45–7.14 V at 10 mA), clamps to 10.5 V at 57.1 A, and operates up to +185 °C junction temperature - making it suitable for automotive engine control units, industrial sensor interfaces, and telecom power supply protection.
For engineers reviewing the TPSMB6.8AHE3_A/H datasheet, TPSMB6.8AHE3_A/H pinout, TPSMB6.8AHE3_A/H application, or TPSMB6.8AHE3_A/H equivalent, key selection criteria include its SMB (DO-214AA) package, unidirectional polarity, AEC-Q101 qualification, 5.8 V stand-off voltage (VWM), and low 0.047 %/°C temperature coefficient of VBR.
Technical Context
This TVS diode uses passivated anisotropic rectifier technology to achieve stable clamping under high-temperature stress (TJ = 185 °C) and repetitive surge conditions. Its 10/1000 μs waveform rating reflects standardized IEC 61000-4-5 surge immunity testing requirements for automotive and industrial systems.
The device exhibits very fast response time (<1 ns), low incremental surge resistance, and excellent clamping ratio (VC/VBR ≈ 1.55), enabling robust protection of downstream MOSFETs and ICs without sacrificing signal integrity or introducing excessive forward voltage drop during conduction.
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 avalanche conduction begins, critical for matching system overvoltage tolerance margins |
| VWM | 5.8 V - maximum continuous reverse operating voltage before leakage exceeds 500 μA, ensuring no false triggering during normal operation |
| VC @ IPPM | 10.5 V at 57.1 A - clamped voltage during 600 W surge event, directly limiting stress on protected components |
| PPPM | 600 W (10/1000 μs) - peak pulse power handling capacity aligned with IEC 61000-4-5 Level 4 surge test requirements |
| TJ max. | +185 °C - enables use in under-hood automotive environments and high-power industrial enclosures without derating |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 0.220" x 0.205" footprint and MSL Level 1 moisture sensitivity |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD per AEC standard |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, cathode indicated by color band. Dimensions: 3.94 mm × 2.20 mm × 1.52 mm (L × W × H); mounting pad layout per Vishay spec 88406, page 4.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal during reverse-biased clamping | Connected to protected line (e.g., VIN or signal trace); forms low-impedance path to ground when VREV > VBR |
| Cathode | Current exit terminal during clamping; marked with band | Connected to system ground or low-impedance return path; determines unidirectional polarity and clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| Junction passivation optimized design | Enables stable VBR drift < ±5 % over 1000 hrs at 150 °C, supporting long-term reliability in harsh thermal environments |
| 185 °C junction capability | Eliminates need for thermal derating in engine control modules and motor drive inverters operating near heat sources |
| 600 W peak pulse power (10/1000 μs) | Withstands repeated ISO 7637-2 Pulse 1/2a/5a transients without degradation, verified per JESD22-A114 |
| Low clamping ratio (VC/VBR = 1.55) | Minimizes voltage overshoot across protected ICs, reducing risk of latch-up or gate oxide damage in 5 V logic rails |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive applications including powertrain, body electronics, and ADAS sensors requiring zero-failure field performance |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients in passenger vehicles. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between battery rail and DC-DC input, absorbing >100 V spikes within nanoseconds. Use Value: Prevents permanent damage to LDOs and microcontrollers during ISO 16750-2 load dump events (up to 35 V, 400 ms), leveraging 185 °C TJ rating for under-hood placement. |
Use Scenario: Safeguarding 4–20 mA current-loop transmitters in factory automation against ESD and inductive kickback from solenoid valves. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional TPSMB6.8AHE3_A/H placed across loop supply terminals to clamp negative-going transients only. Use Value: Maintains loop accuracy with <500 μA leakage at 5.8 V, while clamping 1 kV ESD events to <10.5 V - preserving analog signal fidelity and avoiding ADC saturation. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
Use Scenario: Shielding PoE-powered network switches from induced surges on 48 V DC input derived from centralized power supplies. IC Role / Device Role / Timing Role: Primary overvoltage clamp on secondary-side 48 V bus, coordinated with upstream MOVs and fuses. Use Value: Delivers 600 W surge handling without thermal runaway, meeting IEC 61000-4-5 Level 4 (4 kV line-earth) with minimal PCB area due to SMB footprint. |
Use Scenario: Suppressing back-EMF from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Mounted across motor terminals to shunt inductive energy into chassis ground during PWM commutation. Use Value: Withstands 75 A non-repetitive forward surge (IFSM) and clamps transients to 10.5 V, preventing MOSFET drain-source breakdown and extending driver IC lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8A | Same SMB package, identical VBR range and PPPM, but rated for 150 °C max TJ and not AEC-Q101 qualified | Lacks automotive qualification; suitable for commercial/industrial use only | Select SMBJ6.8A only if AEC-Q101 compliance is not required and ambient temperature remains below 125 °C |
| 1.5SMC6.8A | Higher 1500 W PPPM rating but larger SMC (DO-214AB) package; VBR min 6.45 V same, but VC = 11.2 V at 133 A | Requires larger PCB area and different thermal pad layout; better for higher-energy surges | Choose 1.5SMC6.8A when surge energy exceeds 600 W or when system-level testing requires margin beyond IEC 61000-4-5 Level 4 |
Compared with SMBJ6.8A and 1.5SMC6.8A, the TPSMB6.8AHE3_A/H uniquely combines AEC-Q101 qualification, 185 °C operation, and SMB footprint - enabling direct replacement in automotive designs where space, thermal resilience, and qualification are jointly constrained.
Availability
TPSMB6.8AHE3_A/H is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply across multi-year production cycles.
Supply support for TPSMB6.8AHE3_A/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 high-reliability, high-temperature, and automotive-grade solutions.
The TPSMB series was engineered specifically for demanding transient suppression in automotive and industrial environments, prioritizing AEC-Q101 qualification, 185 °C operation, and consistent clamping performance across wide temperature ranges.
FAQ
What is the maximum clamping voltage of the TPSMB6.8AHE3_A/H under surge conditions?
The TPSMB6.8AHE3_A/H clamps to a maximum of 10.5 V when subjected to its rated peak pulse current of 57.1 A (10/1000 μs waveform). This value is measured per ANSI/IEEE C62.35 and ensures downstream components see limited overvoltage stress during transient events. The clamping voltage is guaranteed across the full operating temperature range and is integral to the device's protection efficacy in automotive and industrial applications.
Is the TPSMB6.8AHE3_A/H suitable for bidirectional transient protection?
No, the TPSMB6.8AHE3_A/H is unidirectional only, with polarity defined by the cathode band. It protects against positive transients relative to ground (anode-to-ground configuration) and does not conduct in the forward direction under normal bias. For bidirectional protection, two devices in series-opposing configuration or a dedicated bidirectional TVS such as TPSMB6.8CA would be required - but TPSMB6.8AHE3_A/H itself is not rated or characterized for reverse conduction.
Does the TPSMB6.8AHE3_A/H meet automotive qualification standards?
Yes, the TPSMB6.8AHE3_A/H carries the HE3 suffix, indicating it is RoHS-compliant and AEC-Q101 qualified per Vishay documentation (Doc. #88406, Rev. 23-Jan-2024). Qualification includes stress tests for temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge - confirming suitability for automotive powertrain, body, and ADAS applications where zero-field-failure reliability is mandated.
What is the standoff voltage (VWM) and why is it important for TPSMB6.8AHE3_A/H selection?
The TPSMB6.8AHE3_A/H has a maximum working standoff voltage (VWM) of 5.8 V, meaning it remains non-conductive with leakage <500 μA up to this reverse voltage. This parameter is critical to avoid false triggering on nominal 5 V or 3.3 V rails - for example, in microcontroller I/O protection where exceeding VWM could cause excessive quiescent current or logic upset. Designers must ensure system operating voltage stays ≤ VWM under all steady-state conditions.
How does the temperature coefficient of VBR affect TPSMB6.8AHE3_A/H performance in high-temperature environments?
The TPSMB6.8AHE3_A/H has a typical VBR temperature coefficient (αT) of +0.047 %/°C, meaning its breakdown voltage increases linearly with junction temperature. At 150 °C, VBR rises ~5.9 % above its 25 °C value - from 6.80 V to ~7.20 V. This predictable drift ensures stable protection margins across automotive under-hood temperatures and eliminates unexpected early clamping or failure to trigger.
TPSMB6.8AHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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):
- 57.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 185°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
TPSMB6.8AHE3_A/H FAQ
1.How can I place an order for TPSMB6.8AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for TPSMB6.8AHE3_A/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 TPSMB6.8AHE3_A/H reliable?
The price and inventory of TPSMB6.8AHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TPSMB6.8AHE3_A/H is usually 5 days.
3.What payment methods are accepted for TPSMB6.8AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TPSMB6.8AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TPSMB6.8AHE3_A/H?
TPSMB6.8AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TPSMB6.8AHE3_A/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 TPSMB6.8AHE3_A/H?
For technical support, including TPSMB6.8AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TPSMB6.8AHE3_A/H requirements.
6.How does Aetrix verify that TPSMB6.8AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All TPSMB6.8AHE3_A/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 TPSMB6.8AHE3_A/H meets industry standards.
7.What is the process for return or replacement of TPSMB6.8AHE3_A/H?
All TPSMB6.8AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with TPSMB6.8AHE3_A/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 TPSMB6.8AHE3_A/H part is unused and in its original packaging.
Return procedure for TPSMB6.8AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TPSMB6.8AHE3_A/H Tags
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