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Vishay General Semiconductor - Diodes Division P6SMB12A-E3/5B
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- Part No.:
- P6SMB12A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB12A-E3/5B.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,508
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Product details
Overview
P6SMB12A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the P6SMB series, designed for robust overvoltage protection of sensitive electronics. It features a 12 V breakdown voltage (VBR = 11.4–12.6 V at 1 mA), 10.2 V stand-off voltage (VWM), and clamps transients to ≤16.7 V at 35.9 A peak pulse current (10/1000 µs), delivering 600 W peak pulse power. It is widely deployed in automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the P6SMB12A-E3/5B datasheet, P6SMB12A-E3/5B pinout, P6SMB12A-E3/5B application, or P6SMB12A-E3/5B equivalent, this page provides verified electrical specifications, SMB (DO-214AA) package details, real-world protection use cases, and validated alternative parts for design-in flexibility and supply continuity.
Technical Context
The P6SMB12A-E3/5B operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to ESD and surge events. Its clamping behavior is defined by a low incremental surge resistance and stable thermal coefficient of VBR (+0.078 %/°C), ensuring predictable performance across temperature.
It is rated for 100 A non-repetitive forward surge current (8.3 ms half-sine), supports 150 °C maximum junction temperature, and meets J-STD-020 MSL Level 1 with 260 °C reflow peak. The device is RoHS-compliant (E3 suffix) and qualified per AEC-Q101 when ordered with HE3/HM3 suffixes - though P6SMB12A-E3/5B itself is commercial-grade.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 10.2 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown) | 11.4–12.6 V at 1 mA - Guaranteed avalanche initiation range; ensures consistent turn-on under transient stress |
| VC (Clamping) | ≤16.7 V at 35.9 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; critical for IC-level survivability |
| PPPM | 600 W - Peak pulse power handling capability; enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) |
| IPPM | 35.9 A - Maximum transient current the device safely shunts without degradation; derived from 10/1000 µs waveform |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient |
| TJ max | +150 °C - Maximum allowable junction temperature; sets upper limit for sustained power dissipation and surge repetition rate |
Pinout & Package
Package: SMB (DO-214AA) - surface-mount, low-profile plastic case with matte tin-plated leads, UL 94 V-0 rated molding compound, and polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (unidirectional) | Connected to ground or lower-potential rail; completes current path during reverse-biased clamping |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., CAN_H, USB_VBUS); conducts avalanche current when VLINE exceeds VWM |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against high-energy transients per IEC 61000-4-5, eliminating need for cascaded TVS stages |
| Glass-passivated junction | Ensures long-term reliability and stable leakage (<5 µA at VWM) across humidity and thermal cycling |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without pre-baking; compatible with automated SMT assembly lines |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during clamping, protecting 12 V-rated ICs such as LIN transceivers and microcontrollers |
| RoHS-compliant (E3 suffix) | Fulfills environmental compliance requirements for global commercial and industrial equipment without halogen restrictions |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load-dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and MCU ADC input to clamp transients before they reach precision analog circuitry. Use Value: Limits voltage excursion to ≤16.7 V during 100 V/50 ms load dump, preserving 12-bit ADC accuracy and preventing latch-up in 3.3 V or 5 V microcontrollers. |
Use Scenario: Shielding RS-485 transceiver data lines in factory automation PLCs from EFT bursts and lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Standoff-connected TVS on differential bus lines (A/B) to absorb common-mode energy while maintaining signal integrity. Use Value: Clamps induced surges to <17 V within nanoseconds, preventing damage to ±7 V-rated transceivers and avoiding communication lockup during EMC testing. |
| Consumer Power Adapter Input | Telecom DC Power Rail |
Use Scenario: Safeguarding primary-side controller ICs in 12 V wall adapters subjected to AC line surges and capacitor discharge events. IC Role / Device Role / Timing Role: Unidirectional TVS placed across bulk capacitor input to divert surge current away from switching MOSFET gate drivers. Use Value: Absorbs 600 W transient energy without failure, maintaining adapter uptime and meeting UL 1449 Type 4 SPD requirements. |
Use Scenario: Protecting PoE-powered Ethernet switches' 48 V DC input rails from induced surges on outdoor cabling. IC Role / Device Role / Timing Role: TVS mounted at board edge on +48 V rail to clamp fast-rising transients before reaching DC/DC converters and PHY ICs. Use Value: Withstands repeated 10/1000 µs surges up to 35.9 A, ensuring >100,000 surge cycles per MIL-STD-883H Method 3015.8. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A | Same SMB package, identical VWM (10.2 V) and VC (16.7 V), but lower PPPM (400 W) and IPPM (24.1 A) | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); unsuitable for IEC 61000-4-5 Level 3+ surges | Select SMAJ12A only if system-level surge testing is limited to ≤2 kV and cost sensitivity outweighs headroom needs. |
| 1.5SMC12A | Higher-power SMC package (1500 W PPPM, 122 A IPPM), same VWM/VBR/VC, but 3.5× larger footprint and 2× higher RθJA | Overqualified for PCB space-constrained designs; introduces unnecessary thermal mass and layout complexity | Choose 1.5SMC12A only when legacy board redesign allows SMC placement and surge margin must exceed 600 W by ≥2×. |
Compared with SMAJ12A and 1.5SMC12A, P6SMB12A-E3/5B delivers optimal balance of 600 W surge capacity, SMB footprint compatibility, and commercial-grade cost-making it the preferred choice for new 12 V rail protection where space, reliability, and test compliance are jointly constrained.
Availability
P6SMB12A-E3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial I/O terminals, consumer power adapters, and telecom DC power systems requiring stable component supply and full traceability.
Supply support for P6SMB12A-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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The P6SMB Series was engineered for high-reliability transient suppression in space-constrained surface-mount applications, targeting automotive, industrial, and communications equipment where robustness against load-switching and lightning-induced surges is mandatory.
FAQ
What is the maximum clamping voltage of the P6SMB12A-E3/5B under a 10/1000 µs surge?
The P6SMB12A-E3/5B clamps to a maximum of 16.7 V when subjected to its rated peak pulse current of 35.9 A (10/1000 µs waveform). This value is guaranteed across temperature and lifetime, and reflects the actual voltage imposed on downstream circuitry during surge events - a critical parameter for ensuring compatibility with 12 V logic and analog components. The P6SMB12A-E3/5B achieves this with low dynamic impedance and stable avalanche characteristics.
Is the P6SMB12A-E3/5B suitable for automotive applications?
The P6SMB12A-E3/5B is RoHS-compliant and manufactured to commercial-grade specifications. While it shares the P6SMB platform with AEC-Q101-qualified variants (e.g., P6SMB12AHE3_B), the P6SMB12A-E3/5B itself is not AEC-Q101 certified. For automotive use, engineers must validate system-level robustness per ISO 16750-2 and consult Vishay's qualified alternatives - the P6SMB12A-E3/5B remains appropriate for non-safety-critical aftermarket or cabin electronics where qualification is not mandated.
What does the "E3/5B" suffix indicate in P6SMB12A-E3/5B?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads; "5B" specifies packaging in a 13-inch diameter plastic tape-and-reel format containing 3200 units. This configuration supports high-volume SMT placement and aligns with IPC-7351B land patterns for SMB (DO-214AA). The P6SMB12A-E3/5B is not halogen-free (that requires "M3") nor AEC-Q101 qualified (which requires "HE3" or "HM3").
How does the thermal resistance of the P6SMB12A-E3/5B affect its surge rating?
The P6SMB12A-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W on standard 0.2" × 0.2" copper pads. Because its 600 W peak pulse rating assumes short-duration, non-repetitive events (duty cycle ≤0.01 %), thermal resistance does not limit single-pulse capability - but governs safe repetition rate. At 25 °C ambient, the P6SMB12A-E3/5B can sustain ≤1 pulse per second continuously; higher rates require derating per Figure 2 in the Vishay datasheet 88370.
Can the P6SMB12A-E3/5B be used in bidirectional configurations?
No - the P6SMB12A-E3/5B is strictly unidirectional, as confirmed by its part number suffix "A" (not "CA") and cathode-band marking. Bidirectional operation requires the CA variant (e.g., P6SMB12CA), which lacks polarity marking and exhibits symmetrical clamping in both directions. Using P6SMB12A-E3/5B in bidirectional signal paths risks forward conduction during negative transients and potential device failure.
P6SMB12A-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):
- 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)
P6SMB12A-E3/5B FAQ
1.How can I place an order for P6SMB12A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB12A-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 P6SMB12A-E3/5B reliable?
The price and inventory of P6SMB12A-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 P6SMB12A-E3/5B is usually 5 days.
3.What payment methods are accepted for P6SMB12A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB12A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB12A-E3/5B?
P6SMB12A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB12A-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 P6SMB12A-E3/5B?
For technical support, including P6SMB12A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB12A-E3/5B requirements.
6.How does Aetrix verify that P6SMB12A-E3/5B is sourced from the original manufacturer or authorized distributors?
All P6SMB12A-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 P6SMB12A-E3/5B meets industry standards.
7.What is the process for return or replacement of P6SMB12A-E3/5B?
All P6SMB12A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB12A-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 P6SMB12A-E3/5B part is unused and in its original packaging.
Return procedure for P6SMB12A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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