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Vishay General Semiconductor - Diodes Division P6SMB15CA-M3/5B
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- Part No.:
- P6SMB15CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB15CA-M3/5B.pdf
- Description:
- TVS DIODE 12.8VWM 21.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
P6SMB15CA-M3/5B 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 15 V standoff voltage (VWM), 21.2 V maximum clamping voltage at 28.3 A peak pulse current, and 600 W peak pulse power capability with 10/1000 μs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the P6SMB15CA-M3/5B datasheet, P6SMB15CA-M3/5B pinout, P6SMB15CA-M3/5B application, or P6SMB15CA-M3/5B equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal derating curves, AEC-Q101 qualification status, and real-world design implications for surge immunity in 12 V and 24 V systems.
Technical Context
The P6SMB15CA-M3/5B operates as a symmetrical bidirectional TVS, with identical breakdown (VBR min/max = 14.3–15.8 V) and clamping characteristics in both polarities. Its glass-passivated junction enables fast response (<1 ns) and low incremental surge resistance, critical for protecting MOSFET gates and microcontroller I/O against ESD and inductive switching spikes.
Thermal performance is defined by RθJA = 100 °C/W (junction-to-ambient, on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W (junction-to-lead), supporting reliable operation up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020 and is halogen-free, RoHS-compliant (M3 suffix).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 12.8 V - Maximum continuous reverse voltage before significant leakage; sets operating margin below clamping threshold in 12 V nominal systems. |
| VBR (Breakdown) | 14.3–15.8 V at 1 mA - Confirmed symmetric conduction onset in both directions; ensures predictable turn-on during bidirectional surges. |
| VC (Clamping) | 21.2 V at IPPM = 28.3 A - Peak voltage seen by protected circuit during 10/1000 μs transient; defines minimum IC overvoltage tolerance requirement. |
| PPPM | 600 W - Sustained energy absorption under standardized surge waveform; validates suitability for ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3. |
| ID (Leakage) | 1.0 μA max at VWM - Negligible standby current draw; avoids loading of high-impedance sensor bias networks or reference dividers. |
| TJ max | +150 °C - Enables deployment in under-hood automotive environments and industrial enclosures without forced cooling. |
| Package | SMB (DO-214AA) - Surface-mount footprint compatible with automated placement; 0.220" × 0.130" body supports IPC-7351B density Class B layout rules. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; connects across protected line and ground (or between differential lines) without orientation constraint. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled signals, RS-485 buses, and ungrounded power rails without polarity concerns. |
| 600 W peak pulse power | Handles repetitive 10/1000 μs surges at 0.01% duty cycle - sufficient for automotive load-dump and industrial relay-coil flyback events. |
| Halogen-free, RoHS-compliant (M3) | Meets EU Directive 2011/65/EU and JEDEC J-STD-20D; supports green manufacturing and end-of-life compliance reporting. |
| AEC-Q101 qualified (with _B suffix) | Validated for automotive electronics per stress test conditions including HTGB, HTRB, and temperature cycling - P6SMB15CA-M3/5B is commercial-grade; AEC version requires HM3_B suffix. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life at ≤30 °C/60% RH; eliminates bake requirements prior to reflow, reducing assembly cost and risk of delamination. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and Hall-effect sensor outputs from battery dump and alternator ripple in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and chassis ground, limiting transients to <21.2 V during ISO 7637-2 Pulse 5a. Use Value: Prevents latch-up or gate oxide damage in 3.3 V/5 V interface ICs while maintaining signal integrity due to sub-1 ns response time. |
Use Scenario: Shielding 4–20 mA current-loop inputs in programmable logic controllers from field-wiring induced surges and electrostatic discharge. IC Role / Device Role / Timing Role: Low-leakage (≤1 μA) shunt protector across input terminals, activated only during >12.8 V excursions. Use Value: Preserves loop accuracy during normal operation and clamps fault energy within safe limits for precision op-amp front-ends. |
| Consumer Power Adapter Output | Telecom Ethernet PHY Protection |
|
Use Scenario: Safeguarding secondary-side DC output of wall adapters and USB PD chargers against lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Standoff-rated TVS connected from VOUT to GND, absorbing 600 W pulses without degradation over 10⁵ cycles. Use Value: Eliminates need for series impedance or additional filtering, enabling compact, cost-effective Class II isolation designs. |
Use Scenario: Protecting 10/100/1000BASE-T Ethernet PHYs from ESD (IEC 61000-4-2 ±15 kV) and surge (IEC 61000-4-5 Level 2) on transformer-coupled pairs. IC Role / Device Role / Timing Role: Bidirectional clamp across differential pair (e.g., TX+/TX−), leveraging symmetry to suppress mode conversion. Use Value: Maintains signal integrity up to 100 MHz with <0.5 pF typical junction capacitance at zero bias - verified per Fig. 4 of datasheet. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA | Same SMB package, identical VWM/VBR/VC specs, but rated for 600 W with tighter VBR tolerance (±5% vs ±7% for P6SMB15CA); higher production volume. | Preferred for high-reliability telecom infrastructure where tighter parametric control is required; same PCB layout. | Select SMBJ15CA when tighter breakdown voltage distribution is needed for statistical surge margin analysis. |
| 1.5SMC15CA | Larger SMC (DO-214AB) package; same electrical specs but higher thermal mass (RθJA = 60 °C/W); 1.5 kW peak power rating. | Better suited for high-energy industrial motor drives where sustained surge repetition occurs; requires larger pad area. | Choose 1.5SMC15CA only if system-level testing confirms >600 W surge energy or elevated ambient temperatures exceed 85 °C. |
Compared with SMBJ15CA, P6SMB15CA-M3/5B offers broader VBR tolerance and halogen-free compliance out-of-box; versus 1.5SMC15CA, it trades thermal robustness for space-constrained layouts - making P6SMB15CA-M3/5B optimal for automotive ECUs and portable equipment where size and regulatory compliance are primary constraints.
Availability
P6SMB15CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor protection, industrial analog input conditioning, and consumer power adapter output clamping requiring stable component supply and full traceability.
Supply support for P6SMB15CA-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, and protection devices with emphasis on reliability, efficiency, and automotive-grade qualification.
The P6SMB Series targets cost-sensitive, high-volume transient suppression needs in automotive, industrial, and consumer electronics - engineered for automated assembly, AEC-Q101 readiness, and consistent clamping performance across temperature.
FAQ
What is the maximum clamping voltage of the P6SMB15CA-M3/5B under a 10/1000 μs surge?
The P6SMB15CA-M3/5B exhibits a maximum clamping voltage (VC) of 21.2 V when subjected to its rated peak pulse current of 28.3 A using the standard 10/1000 μs waveform. This value is measured at TJ = 25 °C and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings. The P6SMB15CA-M3/5B maintains this clamping performance across its full operating temperature range, with minor derating above 25 °C per Figure 2 in the datasheet.
Is the P6SMB15CA-M3/5B AEC-Q101 qualified?
The P6SMB15CA-M3/5B itself is not AEC-Q101 qualified; it carries the M3 suffix indicating halogen-free, RoHS-compliant commercial-grade construction. However, Vishay offers an AEC-Q101 qualified variant under the ordering code P6SMB15CAHM3_B/5B - where "HM3" denotes halogen-free + AEC-Q101, and "_B" specifies the automotive revision grade. Engineers requiring automotive qualification must specify the HM3_B version; the P6SMB15CA-M3/5B is intended for industrial and consumer applications where AEC certification is not mandated.
What does the "CA" suffix mean in P6SMB15CA-M3/5B?
The "CA" suffix in P6SMB15CA-M3/5B explicitly denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both forward and reverse directions, with identical VBR, VC, and leakage characteristics across polarity. This distinguishes it from unidirectional variants (e.g., P6SMB15A), which feature a cathode band and conduct only in one direction. The CA version is essential for protecting AC signals, differential buses like RS-485, or floating power domains where voltage polarity reversal can occur.
What is the thermal resistance of the P6SMB15CA-M3/5B, and how does it affect layout?
The P6SMB15CA-M3/5B 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 - as specified in the datasheet's test condition. This value directly impacts PCB layout: reducing pad size or omitting thermal vias increases actual RθJA, risking junction overheating during repetitive surges. To maintain reliability, designers must adhere to the recommended pad dimensions and consider adding thermal vias under the leads if ambient temperatures exceed 70 °C or surge repetition rates increase beyond 0.01% duty cycle.
How does the P6SMB15CA-M3/5B compare to the P6SMB15A in terms of circuit implementation?
The P6SMB15CA-M3/5B differs fundamentally from the unidirectional P6SMB15A in polarity handling: the CA version requires no orientation during placement and protects both positive and negative transients equally, whereas the P6SMB15A must be installed with its cathode band aligned toward the more positive potential. In practice, this makes the P6SMB15CA-M3/5B ideal for differential or AC-coupled lines (e.g., USB D+/D−, CAN_H/CAN_L), while the P6SMB15A suits DC rail-to-ground protection where polarity is fixed. Both share identical VWM (12.8 V), VBR (14.3–15.8 V), and PPPM (600 W), but only the CA variant guarantees matched performance in either direction - a key distinction reflected in the P6SMB15CA-M3/5B's symmetrical pinout and absence of marking.
P6SMB15CA-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):
- 12.8V
- Voltage - Breakdown (Min):
- 14.3V
- Voltage - Clamping (Max) @ Ipp:
- 21.2V
- Current - Peak Pulse (10/1000µs):
- 28.3A
- 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)
P6SMB15CA-M3/5B FAQ
1.How can I place an order for P6SMB15CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB15CA-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 P6SMB15CA-M3/5B reliable?
The price and inventory of P6SMB15CA-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 P6SMB15CA-M3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB15CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB15CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB15CA-M3/5B?
P6SMB15CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB15CA-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 P6SMB15CA-M3/5B?
For technical support, including P6SMB15CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB15CA-M3/5B requirements.
6.How does Aetrix verify that P6SMB15CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB15CA-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 P6SMB15CA-M3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB15CA-M3/5B?
All P6SMB15CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB15CA-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 P6SMB15CA-M3/5B part is unused and in its original packaging.
Return procedure for P6SMB15CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
P6SMB15CA-M3/5B Tags
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