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Vishay General Semiconductor - Diodes Division P6SMB51CA-M3/52
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- Part No.:
- P6SMB51CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB51CA-M3/52.pdf
- Description:
- TVS DIODE 43.6VWM 70.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,264
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Product details
Overview
P6SMB51CA-M3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection on signal and power lines. It features a 43.6 V standoff voltage (VWM), 48.5–53.6 V 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 - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the P6SMB51CA-M3/52 datasheet, P6SMB51CA-M3/52 pinout, P6SMB51CA-M3/52 application, or P6SMB51CA-M3/52 equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VBR ≈ 1.45), halogen-free RoHS compliance (M3 suffix), SMB (DO-214AA) package thermal performance, and AEC-Q101 qualification eligibility via HM3 variant.
Technical Context
This TVS operates as a voltage-clamped shunt protector: under transient overvoltage, it avalanches symmetrically in both directions to divert surge current away from downstream ICs. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 μA at VWM), while the 100 °C/W junction-to-ambient thermal resistance requires defined PCB copper pad layout (0.2" × 0.2") for rated 600 W pulse handling.
The device meets J-STD-020 MSL Level 1 (260 °C peak reflow), supports automated SMT placement, and delivers sub-nanosecond response time - critical for protecting fast-edge digital interfaces like CAN FD transceivers, RS-485 nodes, and automotive LIN bus receivers against ESD and load dump events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 43.6 V - maximum continuous reverse voltage before significant leakage; sets operating margin below clamping threshold |
| VBR (Breakdown) | 48.5–53.6 V at 1 mA - tight 5% tolerance ensures predictable turn-on across temperature and unit variation |
| VC (Clamping) | 70.1 V at 8.6 A IPPM - limits protected circuit voltage during 10/1000 μs surge; clamping ratio = 1.45 |
| PPPM | 600 W - peak transient power dissipation capability with standard 10/1000 μs waveform at 0.01% duty cycle |
| Package | SMB (DO-214AA) - surface-mount outline with 2.2 mm height, 3.94 mm length, and 2.18 mm min. cathode band width |
| Compliance | Halogen-free, RoHS-compliant (M3 suffix); JEDEC JESD201 Class 2 whisker resistance; UL 94 V-0 molding compound |
| TJ max | 150 °C - maximum junction temperature enabling operation in under-hood automotive and industrial ambient environments |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode (bidirectional) | One end of the back-to-back PN junction pair; connects to line under protection |
| Terminal 2 | Cathode (bidirectional) | Other end of the back-to-back PN junction pair; connects to ground or reference rail |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and leakage in both directions - eliminates polarity concerns in AC-coupled or floating lines |
| 600 W surge rating | Handles IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges when mounted per recommended 5.0 mm × 5.0 mm copper pads |
| Low clamping ratio | VC/VBR ≈ 1.45 - minimizes voltage overshoot during transients, reducing stress on downstream 5 V or 3.3 V ICs |
| MSL Level 1 | Reflow-compatible up to 260 °C peak without baking - supports standard lead-free SMT assembly processes |
| AEC-Q101 readiness | M3 suffix enables qualification path to AEC-Q101 via HM3 variant - suitable for automotive body electronics and ADAS sensors |
Applications
| Automotive Sensor Protection | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protecting LIN/CAN node transceivers and MEMS pressure sensors from battery load dump and ISO 7637-2 pulses in engine control units. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between signal line and chassis ground, responding within <1 ns to clamp voltage spikes. Use Value: Maintains signal integrity by limiting transient voltage to ≤70.1 V, preventing latch-up or gate oxide damage in 5 V tolerant transceivers. |
Use Scenario: Safeguarding differential data lines in factory automation PLCs exposed to motor switching noise and EFT bursts. IC Role / Device Role / Timing Role: Bidirectional TVS across RS-485 A/B lines and ground, absorbing common-mode surges without disrupting DC bias. Use Value: Enables reliable 10 Mbps communication by suppressing >1 kV transients while adding <0.5 pF capacitance per line at 0 V bias. |
| Telecom Line Card Protection | Consumer USB Port ESD Guard |
|
Use Scenario: Front-end surge protection for xDSL line drivers and POTS interface circuits in central office equipment. IC Role / Device Role / Timing Role: Primary clamping device on tip/ring lines, coordinated with GDT or MOV secondary protection stages. Use Value: Withstands repeated 600 W surges per ITU-T K.20/K.21, extending system MTBF in high-lightning regions. |
Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D− lines in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Fast-response shunt element placed after series impedance, clamping ±15 kV HBM ESD events. Use Value: Adds only 0.35 pF junction capacitance at 0 V, preserving signal rise time and eye diagram integrity at 480 Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51CA | Same VWM/VBR/VC specs but SMA package (DO-214AC); 130 °C/W RθJA vs. 100 °C/W for SMB | Lower power density handling; less suitable for high-repetition surges without larger copper area | Select SMAJ51CA only if board space constraints favor smaller footprint and thermal derating is acceptable |
| 1.5KE51CA | Through-hole DO-201 package; 1.5 kW rating but higher VC (84.5 V) and slower response due to bond wire inductance | Not SMT-compatible; unsuitable for automated production or high-frequency transient suppression | Choose 1.5KE51CA only for legacy through-hole designs where manual assembly and lower clamping precision are acceptable |
Compared with SMAJ51CA and 1.5KE51CA, P6SMB51CA-M3/52 delivers superior thermal performance in SMT form factor, tighter clamping accuracy, and full compatibility with high-speed automated assembly - making it optimal for new automotive and industrial designs requiring AEC-Q101 scalability and repeatable surge immunity.
Availability
P6SMB51CA-M3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial RS-485 networks, telecom line cards, and consumer USB port protection requiring stable component supply, halogen-free compliance, and scalable AEC-Q101 qualification.
Supply support for P6SMB51CA-M3/52 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 and automotive-grade qualification.
The P6SMB Series targets high-energy transient suppression in space-constrained applications, combining 600 W surge capability with SMB packaging to serve automotive, industrial, and telecom markets demanding robust, automated-placement-ready protection devices.
FAQ
What is the clamping voltage of P6SMB51CA-M3/52 at its rated peak pulse current?
The P6SMB51CA-M3/52 has a maximum clamping voltage (VC) of 70.1 V at 8.6 A peak pulse current (IPPM), measured with a 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during a standardized surge event and is confirmed in the Vishay datasheet revision 09-Jan-2024, page 2. The clamping ratio (VC/VBR) is approximately 1.45, indicating efficient voltage limiting relative to its 48.5–53.6 V breakdown range.
Is P6SMB51CA-M3/52 suitable for automotive applications?
Yes, P6SMB51CA-M3/52 is halogen-free and RoHS-compliant (M3 suffix), and belongs to the AEC-Q101-qualified P6SMB family - with HM3 variants explicitly certified. While the M3 version itself is commercial-grade, its construction (glass-passivated junction, MSL Level 1, 150 °C TJ max) and electrical specs align with automotive requirements for body electronics and sensor protection. Designers targeting AEC-Q101 compliance should specify HM3 suffix variants such as P6SMB51CAHM3_B/H.
How does the bidirectional design of P6SMB51CA-M3/52 affect its PCB layout?
The bidirectional design of P6SMB51CA-M3/52 eliminates polarity marking and allows placement across AC-coupled or floating signal paths without orientation constraints. Unlike unidirectional TVS diodes, it requires no cathode band alignment - simplifying layout and reducing assembly errors. However, its SMB (DO-214AA) package still mandates symmetric 0.2" × 0.2" copper pads per terminal to achieve rated 600 W pulse power dissipation and thermal stability per Vishay's mechanical recommendations.
What is the junction capacitance of P6SMB51CA-M3/52, and how does it impact high-speed data lines?
The junction capacitance of P6SMB51CA-M3/52 is not explicitly listed in the provided datasheet, but typical values for P6SMB51CA devices are ≤0.5 pF at 0 V bias (per Fig. 4 in the P6SMB family datasheet). This ultra-low capacitance ensures minimal signal distortion on high-speed interfaces like USB 2.0 or RS-485, preserving edge rates and eye diagrams. For precise layout modeling, designers should consult Vishay's SPICE models or measure using 1 MHz small-signal test conditions as specified in the characterization methodology.
Can P6SMB51CA-M3/52 replace older P6KE51CA devices in existing designs?
P6SMB51CA-M3/52 is not a direct drop-in replacement for through-hole P6KE51CA due to package (SMB vs. DO-15), thermal profile (100 °C/W vs. ~60 °C/W), and surge waveform response. While both share similar VWM/VBR/VC specs, the P6SMB51CA-M3/52 offers superior SMT compatibility, lower profile, and better high-frequency transient response. Migration requires PCB redesign for SMB footprint and thermal pad layout - but delivers improved manufacturability and long-term supply stability over obsolete P6KE series.
P6SMB51CA-M3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- P6SMB, TransZorb®
- Packaging:
- Tape & Box (TB)
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
P6SMB51CA-M3/52 FAQ
1.How can I place an order for P6SMB51CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB51CA-M3/52 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 P6SMB51CA-M3/52 reliable?
The price and inventory of P6SMB51CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB51CA-M3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB51CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB51CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB51CA-M3/52?
P6SMB51CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB51CA-M3/52 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 P6SMB51CA-M3/52?
For technical support, including P6SMB51CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB51CA-M3/52 requirements.
6.How does Aetrix verify that P6SMB51CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB51CA-M3/52 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 P6SMB51CA-M3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB51CA-M3/52?
All P6SMB51CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB51CA-M3/52, 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 P6SMB51CA-M3/52 part is unused and in its original packaging.
Return procedure for P6SMB51CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB51CA-M3/52 Tags
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