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Vishay General Semiconductor - Diodes Division P6SMB51CAHE3_B/I
- Part No.:
- P6SMB51CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51CAHE3_B/I.pdf
- Description:
- 600W,51V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,394
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Product details
Overview
P6SMB51CAHE3_B/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 43.6 V standoff voltage (VWM), 51 V nominal breakdown voltage (VBR at 1 mA), 70.1 V maximum clamping voltage (VC) at 8.6 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial electronics.
For engineers reviewing the P6SMB51CAHE3_B/I datasheet, P6SMB51CAHE3_B/I pinout, P6SMB51CAHE3_B/I application, or P6SMB51CAHE3_B/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low incremental surge resistance, fast response time, and compatibility with automated SMT placement on PCBs requiring robust ESD and surge immunity per IEC 61000-4-2/4-5.
Technical Context
This device operates as a voltage-clamping protector in both polarities, leveraging an avalanche breakdown mechanism to limit transient overvoltages before they damage downstream circuitry. Its bidirectional symmetry ensures identical clamping behavior regardless of polarity, eliminating need for orientation-sensitive layout.
Designed for repetitive surge events with 0.01% duty cycle, it sustains 600 W peak pulse power under standardized 10/1000 µs waveform while maintaining thermal stability up to 150 °C junction temperature. The glass-passivated junction and MSL Level 1 moisture sensitivity rating support high-reliability reflow assembly without popcorn cracking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 43.6 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 48.5–53.6 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on during transients |
| VC (Clamping Voltage) | 70.1 V at 8.6 A IPPM - Peak voltage seen by protected circuit during worst-case 10/1000 µs surge |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy absorption capacity without failure under standard waveform |
| TJ max. | 150 °C - Maximum allowable junction temperature; enables operation in under-hood automotive environments |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical two-terminal construction with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no fixed polarity |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path across protected line |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV, 2 Ω source) on 50 Ω lines without degradation |
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics applications requiring zero defect field performance |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes let-through voltage stress on protected ICs compared to higher-ratio suppressors |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profile use without baking preconditioning |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control units from load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential sensor pair or single-ended output to ground. Use Value: Prevents latch-up or permanent damage to precision ADC inputs while maintaining signal integrity below 43.6 V normal operation. |
Use Scenario: Safeguarding CANH/CANL lines in vehicle ECUs against ESD (±8 kV contact) and ISO 7637-2 pulse 1/2/5a transients. IC Role / Device Role / Timing Role: Low-capacitance TVS pair (one per line) referenced to ground, absorbing common-mode surges without distorting 1 Mbps data timing. Use Value: Maintains bus communication integrity during ignition transients and battery disconnect events due to fast <1 ps response and 70.1 V clamping ceiling. |
| Consumer Power Adapter Input Stage | Telecom DSL Line Surge Protection |
Use Scenario: Secondary-side DC input protection in wall adapters exposed to lightning-induced surges via connected devices. IC Role / Device Role / Timing Role: Bidirectional clamp between VOUT and GND, upstream of LDO or DC-DC converter. Use Value: Limits voltage excursions to ≤70.1 V during 600 W surges, preventing overvoltage shutdown or internal FET failure in PMICs. |
Use Scenario: Front-end protection of ADSL/VDSL line interface ICs against induced surges from nearby power lines or lightning coupling. IC Role / Device Role / Timing Role: Differential-mode TVS across tip/ring pair, rated for repeated 10/1000 µs transients up to 4 kV. Use Value: Preserves signal fidelity in 30 MHz bandwidth DSL links by minimizing capacitance (<100 pF at 0 V) and avoiding distortion from slow clamping. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51CA | Same VWM/VBR/VC, but 400 W PPPM rating and SMA package (smaller footprint, lower thermal mass) | Limited to lower-energy transients; not AEC-Q101 qualified | Select when board space is constrained and automotive qualification is unnecessary |
| 1.5KE51CA | Through-hole DO-201 package, 1500 W PPPM, higher VC (84.5 V), slower response due to larger junction | Suitable for primary-side AC line protection, not SMT-compatible or automotive-qualified | Choose for high-energy mains-side protection where PCB mounting method and layout allow through-hole insertion |
Compared with SMAJ51CA and 1.5KE51CA, P6SMB51CAHE3_B/I delivers optimal balance of automotive-grade reliability, 600 W surge handling, SMB-standard SMT compatibility, and tight clamping - making it preferred for space-constrained, high-volume automotive and industrial PCBs requiring zero-layout rework for qualification.
Availability
P6SMB51CAHE3_B/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN networks, consumer power adapters, and telecom DSL line cards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P6SMB51CAHE3_B/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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The P6SMB Series targets high-reliability transient suppression in automotive, industrial, and communications systems - engineered for AEC-Q101 compliance, automated assembly, and consistent clamping performance across temperature and surge repetition rates.
FAQ
What is the clamping voltage of P6SMB51CAHE3_B/I at its rated peak pulse current?
The P6SMB51CAHE3_B/I has a maximum clamping voltage (VC) of 70.1 V at 8.6 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value represents the highest voltage imposed on protected circuitry during a worst-case transient event, ensuring downstream components remain within safe operating limits. The clamping occurs rapidly due to the device's avalanche structure and low incremental surge resistance.
Is P6SMB51CAHE3_B/I suitable for automotive applications?
Yes, P6SMB51CAHE3_B/I is AEC-Q101 qualified - explicitly validated for automotive use per the HE3 suffix and _B revision code. It meets requirements for temperature cycling, highly accelerated life testing (HALT), and ESD robustness required in engine control units, body electronics, and ADAS sensor modules. Its SMB package supports automated SMT assembly compatible with automotive manufacturing standards.
How does the bidirectional design of P6SMB51CAHE3_B/I affect PCB layout?
The bidirectional nature of P6SMB51CAHE3_B/I eliminates polarity marking and orientation constraints - either terminal connects identically across the protected line and ground (or differential pair). This simplifies layout, reduces assembly errors, and enables symmetric placement on AC-coupled or floating nodes. No cathode band interpretation is needed, unlike unidirectional variants such as P6SMB51A.
What is the thermal resistance of P6SMB51CAHE3_B/I, and how does it impact power dissipation?
P6SMB51CAHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W. Under standard 0.2" × 0.2" copper pad layout, this allows safe dissipation of its 5.0 W steady-state power rating at +50 °C ambient. For repetitive surge conditions, thermal derating per Figure 2 must be applied to ensure junction temperature stays ≤150 °C.
Does P6SMB51CAHE3_B/I meet RoHS and halogen-free requirements?
Yes, P6SMB51CAHE3_B/I carries the HE3 suffix, indicating it is RoHS-compliant and AEC-Q101 qualified. It is not halogen-free - that designation applies only to HM3-suffixed variants. Compliance documentation per Vishay's material categorization standard (doc?99912) confirms lead-free solderability and full adherence to EU RoHS Directive 2011/65/EU without exemptions.
P6SMB51CAHE3_B/I 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 43.6V
- Voltage - Breakdown (Min):
- 48.5V
- Voltage - Clamping (Max) @ Ipp:
- 70.1V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMB)
P6SMB51CAHE3_B/I FAQ
1.How can I place an order for P6SMB51CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51CAHE3_B/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 P6SMB51CAHE3_B/I reliable?
The price and inventory of P6SMB51CAHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB51CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for P6SMB51CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51CAHE3_B/I?
P6SMB51CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51CAHE3_B/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 P6SMB51CAHE3_B/I?
For technical support, including P6SMB51CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51CAHE3_B/I requirements.
6.How does Aetrix verify that P6SMB51CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All P6SMB51CAHE3_B/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 P6SMB51CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of P6SMB51CAHE3_B/I?
All P6SMB51CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51CAHE3_B/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 P6SMB51CAHE3_B/I part is unused and in its original packaging.
Return procedure for P6SMB51CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51CAHE3_B/I Tags
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