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Vishay General Semiconductor - Diodes Division P6SMB12CA-M3/5B
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- Part No.:
- P6SMB12CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB12CA-M3/5B.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB12CA-M3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, designed for clamping voltage transients on signal and power lines. It features a 12 V standoff voltage (VWM), 16.7 V maximum clamping voltage at 35.9 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 μs waveform. It is used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive electronics.
For engineers reviewing the P6SMB12CA-M3/5B datasheet, P6SMB12CA-M3/5B pinout, P6SMB12CA-M3/5B application, or P6SMB12CA-M3/5B equivalent, key selection criteria include bidirectional clamping performance, SMB (DO-214AA) package compatibility, AEC-Q101 qualification status, and halogen-free RoHS compliance under M3 suffix.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<5.0 μA at 10.2 V), while the low incremental surge resistance supports consistent clamping under repetitive transient events.
The device is rated for 150 °C maximum junction temperature and meets J-STD-020 MSL Level 1 moisture sensitivity, supporting lead-free reflow up to 260 °C peak. Its thermal resistance (RθJA = 100 °C/W) reflects standard SMB package dissipation limits under typical PCB pad layout (0.2" × 0.2" copper).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 10.2 V - Maximum continuous reverse voltage before significant conduction begins; defines operating margin below clamping threshold. |
| VBR (Breakdown) | 11.4–12.6 V at 1.0 mA - Verified breakdown range ensuring reliable turn-on during transients without premature triggering. |
| VC (Clamping) | 16.7 V at 35.9 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; determines safe IC voltage margin. |
| PPPM | 600 W - Sustains high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without failure when mounted per recommended pad layout. |
| IPPM | 35.9 A - Peak surge current capacity defining minimum system-level transient energy handling (E ≈ ½ × VC × IPPM × tp). |
| TJ max. | 150 °C - Enables operation in under-hood automotive or high-ambient industrial environments without derating below full rating. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated placement. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, and meet JESD 201 Class 2 whisker test requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Common terminal for symmetrical clamping; connects to reference plane (e.g., GND or signal return) in protected circuit. |
| Cathode | Transient return path (bidirectional) | Electrically identical to Anode in CA devices; forms dual-junction structure enabling equal clamping in both polarities. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded power rails without polarity constraints. |
| 600 W peak pulse power | Withstands automotive load-dump and inductive switching surges (per ISO 7637-2) without degradation when applied within duty cycle limits (0.01 %). |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance requirements for modern industrial and automotive production, including JEDEC J-STD-020 MSL Level 1. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on downstream components-critical for protecting 12 V logic interfaces and low-voltage MOSFET gate drivers. |
| Fast response time (<1.0 ps) | Clamps transients before they propagate through sensitive circuitry, preserving signal integrity in high-speed sensor and communication lines. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of engine coolant temperature sensors exposed to alternator load dump and relay coil flyback. IC Role / Device Role / Timing Role: Bidirectional TVS placed across sensor output and ground to clamp ±200 V transients before reaching ADC input stage. Use Value: Prevents latch-up or permanent damage to 12-bit SAR ADCs operating at 3.3 V supply, maintaining ASIL-B functional safety compliance. |
Use Scenario: Shielding 24 V digital input modules in programmable logic controllers from field-wiring induced surges and ESD events. IC Role / Device Role / Timing Role: Primary transient suppressor at terminal block entry point, shunting surge energy before optocoupler input stage. Use Value: Ensures >100,000 actuation cycles without degradation, meeting IEC 61000-4-5 Level 3 (2 kV) immunity requirements. |
| Telecom Line Interface | Consumer Power Adapter Output |
Use Scenario: Safeguarding RS-485 transceivers in building automation gateways connected to long outdoor cabling susceptible to lightning-induced surges. IC Role / Device Role / Timing Role: Differential-mode TVS across A/B bus lines, referenced to local ground, absorbing common-mode transients via coupled path. Use Value: Maintains data integrity up to 10 Mbps while surviving repeated 1 kV/500 Ω ring-wave transients per ITU-T K.21. |
Use Scenario: Clamping output overvoltage spikes caused by transformer leakage inductance and rectifier reverse recovery in 12 V wall adapters. IC Role / Device Role / Timing Role: Secondary-side TVS across DC output terminals, limiting transient excursions that could damage connected USB peripherals. Use Value: Eliminates need for redundant overvoltage protection ICs, reducing BOM count while meeting UL 62368-1 transient immunity clauses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA | Same VWM (10.2 V), identical SMB package, but rated for 600 W with tighter VBR tolerance (11.4–12.6 V vs. 11.4–12.6 V); same M3 halogen-free option available. | No functional difference in clamping behavior or layout; differs only in branding and minor process control parameters. | Select SMBJ12CA if sourcing from alternate authorized distributors where P6SMB12CA-M3/5B stock is constrained; identical electrical and mechanical fit. |
| 1.5SMC12CA | Higher power rating (1500 W), larger SMC (DO-214AB) package (7.11 mm × 6.22 mm), 10.2 V VWM, 16.7 V VC; not pin-compatible with SMB footprint. | Used where higher surge margin is required (e.g., front-end AC/DC inputs), but requires PCB redesign due to larger pad layout and 2.5× footprint area. | Choose 1.5SMC12CA only when system-level testing confirms need for >600 W clamping; otherwise, P6SMB12CA-M3/5B offers optimal size-power balance. |
Compared with SMBJ12CA, P6SMB12CA-M3/5B offers identical protection performance in the same SMB footprint, while 1.5SMC12CA delivers higher surge capacity at the cost of board space and layout change-making P6SMB12CA-M3/5B the preferred choice for space-constrained 12 V rail protection.
Availability
P6SMB12CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line drivers, and consumer power adapter outputs requiring stable component supply and halogen-free compliance.
Supply support for P6SMB12CA-M3/5B 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, rectifiers, TVS devices, and power MOSFETs with emphasis on reliability and automotive-grade qualification.
The P6SMB Series was developed for robust, standardized transient protection in cost-sensitive, high-volume applications-including automotive body electronics and industrial control systems-where SMB footprint and AEC-Q101 readiness are critical.
FAQ
What does the "CA" suffix indicate in P6SMB12CA-M3/5B?
The "CA" suffix denotes a bidirectional configuration, meaning P6SMB12CA-M3/5B provides symmetrical clamping for both positive and negative voltage transients. Unlike unidirectional variants (e.g., P6SMB12A), it has no cathode marking and functions identically in either polarity-ideal for protecting AC-coupled or differential signal paths without polarity constraints.
Is P6SMB12CA-M3/5B AEC-Q101 qualified?
P6SMB12CA-M3/5B is not AEC-Q101 qualified. The datasheet specifies AEC-Q101 qualification only for variants with HE3 or HM3 suffixes and revision codes such as "_B" (e.g., P6SMB12CAHE3_B). The M3/5B variant is commercial-grade, halogen-free, and RoHS-compliant-but lacks automotive qualification documentation or test reports required for AEC-Q101 compliance.
What is the maximum clamping voltage of P6SMB12CA-M3/5B under surge conditions?
The maximum clamping voltage (VC) of P6SMB12CA-M3/5B is 16.7 V at a peak pulse current (IPPM) of 35.9 A, measured using the standard 10/1000 μs double-exponential waveform. This value defines the highest voltage imposed on protected circuitry during worst-case transient events and must be compared against downstream component absolute maximum ratings.
Can P6SMB12CA-M3/5B replace P6SMB12A in an existing design?
No-P6SMB12CA-M3/5B cannot directly replace unidirectional P6SMB12A without circuit review. While both share identical VWM, VBR, and VC values, P6SMB12A is unidirectional (cathode-marked) and conducts forward current, whereas P6SMB12CA-M3/5B is bidirectional and blocks in both directions until breakdown. Substitution may cause unintended conduction in DC-biased paths.
What PCB pad layout is recommended for optimal thermal and surge performance of P6SMB12CA-M3/5B?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad area per terminal for P6SMB12CA-M3/5B to achieve rated 600 W pulse power and thermal resistance (RθJA = 100 °C/W). Smaller pads reduce surge capability and increase junction temperature-potentially causing premature failure during repetitive transients or high ambient operation.
P6SMB12CA-M3/5B 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):
- 10.2V
- Voltage - Breakdown (Min):
- 11.4V
- Voltage - Clamping (Max) @ Ipp:
- 16.7V
- Current - Peak Pulse (10/1000µs):
- 35.9A
- 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)
P6SMB12CA-M3/5B FAQ
1.How can I place an order for P6SMB12CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB12CA-M3/5B 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 P6SMB12CA-M3/5B reliable?
The price and inventory of P6SMB12CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB12CA-M3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB12CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB12CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB12CA-M3/5B?
P6SMB12CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB12CA-M3/5B 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 P6SMB12CA-M3/5B?
For technical support, including P6SMB12CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB12CA-M3/5B requirements.
6.How does Aetrix verify that P6SMB12CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB12CA-M3/5B 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 P6SMB12CA-M3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB12CA-M3/5B?
All P6SMB12CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB12CA-M3/5B, 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 P6SMB12CA-M3/5B part is unused and in its original packaging.
Return procedure for P6SMB12CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB12CA-M3/5B Tags
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Diodes Incorporated
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