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Vishay General Semiconductor - Diodes Division P6SMB6.8A-E3/5B
- Part No.:
- P6SMB6.8A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB6.8A-E3/5B.pdf
- Description:
- TVS DIODE 5.8VWM 10.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:150
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Product details
Overview
P6SMB6.8A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 6.45 V minimum breakdown voltage (VBR), 5.80 V maximum stand-off voltage (VWM), and clamps up to 10.5 V at 57.1 A peak pulse current (IPPM) under 10/1000 µs waveform - ideal for safeguarding MOSFETs, ICs, and sensor signal lines in industrial and automotive power interfaces.
For engineers reviewing the P6SMB6.8A-E3/5B datasheet, P6SMB6.8A-E3/5B pinout, P6SMB6.8A-E3/5B application, or P6SMB6.8A-E3/5B equivalent, key selection criteria include its 600 W peak pulse power rating, unidirectional polarity with cathode band marking, RoHS-compliant matte tin-plated terminals, MSL Level 1 moisture sensitivity, and AEC-Q101 qualification availability (via HE3/HM3 variants).
Technical Context
The P6SMB6.8A-E3/5B operates as a clamping-type TVS diode with avalanche breakdown behavior, triggered when reverse voltage exceeds its 6.45–7.14 V breakdown range at 10 mA test current. Its low incremental surge resistance and fast response time enable effective suppression of transient energy before downstream components experience overvoltage stress.
Thermally, it exhibits 100 °C/W junction-to-ambient thermal resistance (RθJA) on standard 0.2" × 0.2" copper pads and supports continuous power dissipation of 5.0 W at 50 °C ambient. The device is rated for operating junction temperatures from –65 °C to +150 °C and withstands 100 A non-repetitive forward surge current (IFSM) per 8.3 ms half-sine wave.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Breakdown Voltage VBR | 6.45–7.14 V at 10 mA - defines precise voltage threshold at which avalanche conduction begins, enabling accurate overvoltage protection design |
| Stand-off Voltage VWM | 5.80 V max - ensures no conduction during normal operation, preserving signal integrity on protected lines |
| Clamping Voltage VC | 10.5 V at 57.1 A IPPM - limits transient voltage seen by downstream circuitry to safe levels during 10/1000 µs surge events |
| Peak Pulse Power PPPM | 600 W - determines maximum transient energy absorption capability without failure under standardized surge conditions |
| Peak Pulse Current IPPM | 57.1 A - quantifies surge current handling capacity; used with VC to calculate actual clamped power dissipation |
| Reverse Leakage ID | 1000 µA max at VWM - ensures minimal standby power loss and avoids false triggering in low-power systems |
| Junction Temperature Range | –65 °C to +150 °C - supports deployment in harsh environments including under-hood automotive and industrial control cabinets |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case meeting UL 94 V-0 flammability rating; terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference node | Connected to lower-potential side of protected circuit; forms avalanche path with cathode during transients |
| Cathode | Forward current exit / Surge clamping node | Marked with band; tied to higher-potential rail (e.g., VCC or signal line); conducts surge current to ground or rail during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against high-energy ESD and lightning-induced surges without derating in compact layouts |
| Glass passivated chip junction | Improves long-term reliability and stability of breakdown characteristics across temperature and lifetime cycling |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without pre-baking or special handling requirements |
| AEC-Q101 qualified variant available | Validates suitability for automotive powertrain and body electronics where qualification traceability is mandatory |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, enhancing protection margin for sub-5 V logic and analog circuits |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp surges above 13.5 V while remaining inert during nominal operation. Use Value: Limits peak voltage to ≤10.5 V at 57.1 A, preventing damage to 16 V-rated DC-DC converters and microcontrollers. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal line and ground, leveraging fast response to suppress nanosecond-scale transients. Use Value: Maintains signal fidelity with <1000 µA leakage at 5.8 V, avoiding offset errors in precision 4–20 mA loops. |
| Consumer Power Adapter Input Stage | Telecom DSL/POE Interface Protection |
Use Scenario: Safeguarding AC-DC adapter primary-side rectifiers and controllers against mains-borne surges. IC Role / Device Role / Timing Role: Unidirectional TVS installed across bridge rectifier output to absorb repetitive line transients. Use Value: Withstands 0.01 % duty cycle repetitive pulses and dissipates 600 W peaks without degradation, extending adapter MTBF. |
Use Scenario: Protecting Ethernet PHY interface pins in PoE-powered switches and IP cameras from induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: TVS array element configured in unidirectional mode per data pair, referenced to local ground plane. Use Value: Clamps common-mode transients to ≤10.5 V within 1 ns, meeting IEC 61000-4-5 Level 3 immunity requirements. |
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 | Same SMB package, identical VBR (6.45–7.14 V) and VC (10.5 V), but rated for 400 W PPPM (vs. 600 W) | Limited to lower-energy surge environments; not recommended for automotive load dump or industrial motor drive coupling | Select SMAJ6.8A only when system-level surge testing confirms ≤400 W requirement and cost optimization is prioritized |
| 1.5SMC6.8A | Higher-power SMC (DO-214AB) package with same electrical specs but 1500 W PPPM rating and larger footprint (7.11 × 6.22 mm vs. 4.57 × 3.94 mm) | Requires PCB layout revision; suited for high-reliability industrial power supplies where space permits | Choose 1.5SMC6.8A when surge threat level exceeds 600 W or when thermal margin must be increased via larger copper area |
Compared with SMAJ6.8A and 1.5SMC6.8A, the P6SMB6.8A-E3/5B delivers optimal balance of 600 W surge capacity, SMB footprint compatibility, and commercial-grade RoHS compliance - making it the preferred choice for space-constrained designs requiring verified mid-tier transient immunity without board redesign.
Availability
P6SMB6.8A-E3/5B is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and telecom PoE port safeguarding requiring stable component supply, full traceability, and consistent tape-and-reel delivery formats.
Supply support for P6SMB6.8A-E3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific performance.
The P6SMB6.8A-E3/5B belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in automotive, industrial, and communications infrastructure where robustness, consistency, and qualification readiness are critical.
FAQ
What is the maximum clamping voltage of the P6SMB6.8A-E3/5B under surge conditions?
The P6SMB6.8A-E3/5B has a maximum clamping voltage (VC) of 10.5 V at 57.1 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured under defined test conditions per JEDEC standards and represents the highest voltage the device allows across its terminals during a transient event - a critical parameter for ensuring downstream ICs remain within their absolute maximum ratings. The P6SMB6.8A-E3/5B maintains this clamping performance consistently across its specified operating temperature range.
Is the P6SMB6.8A-E3/5B suitable for automotive applications?
The P6SMB6.8A-E3/5B itself is a commercial-grade part (RoHS-compliant, MSL Level 1), but Vishay offers AEC-Q101 qualified versions under ordering codes such as P6SMB6.8AHE3_B. While the P6SMB6.8A-E3/5B meets many automotive electrical requirements - including 150 °C junction temperature rating and robust surge capability - formal automotive qualification requires the HE3 or HM3 suffix variants. Engineers deploying the P6SMB6.8A-E3/5B in automotive prototypes should verify system-level compliance independently.
How does the P6SMB6.8A-E3/5B differ from bidirectional TVS diodes like P6SMB6.8CA?
The P6SMB6.8A-E3/5B is unidirectional and functions only in reverse-bias avalanche mode, with polarity marked by a cathode band; it blocks forward current beyond ~3.5 V. In contrast, P6SMB6.8CA is bidirectional and symmetrical, offering identical clamping in both directions - essential for AC signal lines or differential buses. The P6SMB6.8A-E3/5B is preferred for DC power rails and single-ended signals where polarity is fixed and lower leakage at VWM is advantageous. Its 1000 µA max reverse leakage at 5.8 V is tighter than typical bidirectional variants.
What is the thermal resistance of the P6SMB6.8A-E3/5B, and how does it affect PCB layout?
The P6SMB6.8A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimal copper area; increasing pad size or adding internal thermal vias reduces RθJA and improves sustained power handling. For reliable operation at 5.0 W continuous dissipation, designers must ensure ambient temperature remains ≤50 °C and avoid enclosing the P6SMB6.8A-E3/5B in thermally restrictive enclosures without forced airflow.
Does the P6SMB6.8A-E3/5B require derating at elevated ambient temperatures?
Yes - the P6SMB6.8A-E3/5B must be derated above 25 °C ambient per Figure 2 in the Vishay datasheet (Document Number: 88370). Its peak pulse power capability decreases linearly: at 75 °C ambient, PPPM drops to ~80 % of 600 W (≈480 W); at 125 °C, it falls to ~40 % (≈240 W). Continuous power dissipation (PD = 5.0 W) also derates above 50 °C ambient. These derating curves are essential for validating P6SMB6.8A-E3/5B performance in high-temperature environments like engine compartments or sealed industrial enclosures.
P6SMB6.8A-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, 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):
- 57.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
P6SMB6.8A-E3/5B FAQ
1.How can I place an order for P6SMB6.8A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB6.8A-E3/5B 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 P6SMB6.8A-E3/5B reliable?
The price and inventory of P6SMB6.8A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB6.8A-E3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB6.8A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB6.8A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB6.8A-E3/5B?
P6SMB6.8A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB6.8A-E3/5B 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 P6SMB6.8A-E3/5B?
For technical support, including P6SMB6.8A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB6.8A-E3/5B requirements.
6.How does Aetrix verify that P6SMB6.8A-E3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB6.8A-E3/5B 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 P6SMB6.8A-E3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB6.8A-E3/5B?
All P6SMB6.8A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB6.8A-E3/5B, 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 P6SMB6.8A-E3/5B part is unused and in its original packaging.
Return procedure for P6SMB6.8A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB6.8A-E3/5B Tags
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Diodes Incorporated
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