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Vishay General Semiconductor - Diodes Division P6SMB12A-E3/52
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- Part No.:
- P6SMB12A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
P6SMB12A-E3/52.pdf
- Description:
- TVS DIODE 10.2VWM 16.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,755
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Product details
Overview
P6SMB12A-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 12 V breakdown voltage (VBR = 11.4–12.6 V at 1 mA), 10.2 V stand-off voltage (VWM), and 16.7 V maximum clamping voltage (VC) at 35.9 A peak pulse current - enabling robust protection of 12 V rail electronics against ESD, lightning surges, and inductive switching spikes.
For engineers reviewing the P6SMB12A-E3/52 datasheet, P6SMB12A-E3/52 pinout, P6SMB12A-E3/52 application, or P6SMB12A-E3/52 equivalent, this device is selected for high-reliability transient suppression where low-profile SMT placement, 600 W 10/1000 μs surge capability, and AEC-Q101 qualification readiness (via HE3 suffix variants) are critical design requirements.
Technical Context
The P6SMB12A-E3/52 operates as a unidirectional avalanche diode with glass-passivated junction, delivering fast response (<1 ns) to transient overvoltages while maintaining low incremental surge resistance. Its clamping behavior is defined by a tightly controlled VBR tolerance (±5 %) and temperature coefficient of +0.078 %/°C, ensuring stable protection across automotive and industrial ambient ranges.
Mounted on standard 0.2" × 0.2" copper pads, it achieves 600 W peak pulse power (10/1000 μs waveform) with derating above 25 °C per Fig. 2, and supports repetitive surge duty cycles up to 0.01 %. Its MSL Level 1 rating (260 °C peak reflow) confirms suitability for automated PCB assembly without moisture sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/max) | 11.4 V / 12.6 V at 1 mA - defines precise avalanche onset threshold for reliable clamping initiation |
| VWM | 10.2 V - maximum continuous reverse voltage before leakage exceeds 5 μA, compatible with 12 V nominal systems |
| VC @ IPPM | 16.7 V at 35.9 A - clamped voltage during full 600 W surge, limiting downstream IC stress to safe levels |
| IPPM | 35.9 A - peak pulse current capacity under 10/1000 μs waveform, validated with derated thermal performance |
| PPPM | 600 W - standardized surge power rating enabling direct comparison with IEC 61000-4-5 Level 4 compliance margins |
| TJ max | +150 °C - maximum junction temperature supporting operation in under-hood automotive and industrial enclosures |
| RθJA | 100 °C/W - thermal resistance from junction to ambient, used to calculate safe power dissipation in real PCB layouts |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential node; completes clamping path during reverse transient |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 12 V rail); conducts when voltage exceeds VWM, shunting surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables single-device protection against IEC 61000-4-5 4 kV surge events on 12 V supply rails |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on downstream MOSFETs, regulators, and microcontrollers during clamping |
| MSL Level 1, 260 °C peak reflow | Eliminates pre-bake requirement for high-volume SMT assembly, reducing manufacturing cost and cycle time |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and leakage current under thermal cycling and humidity stress |
| RoHS-compliant, halogen-free option (M3 suffix) | Meets IPC-1752A material declaration requirements for automotive and industrial OEM BOM compliance |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12 V CAN bus power lines and sensor supply rails from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between 12 V rail and chassis ground to clamp positive-going surges. Use Value: Limits transient voltage to ≤16.7 V, preventing latch-up or gate oxide damage in connected CAN transceivers and microcontrollers. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted at connector entry point to absorb >600 W energy before reaching optocoupler input stage. Use Value: Maintains <5 μA leakage at 24 V nominal, preserving input threshold accuracy while surviving repeated 1 kV/500 A surge events. |
| Consumer Power Adapter Output Stage | Telecom Base Station DC Power Distribution |
Use Scenario: Secondary-side overvoltage suppression on 12 V output of AC/DC adapters powering routers and set-top boxes. IC Role / Device Role / Timing Role: Fast-response TVS placed after DC-DC converter to suppress ringing and ESD from hot-plug events. Use Value: Clamps within <1 ns to protect USB-PD controllers and Ethernet PHYs without affecting steady-state regulation. |
Use Scenario: Front-end protection of -48 V DC distribution boards in 4G/5G base stations against lightning-induced surges on outdoor feeder lines. IC Role / Device Role / Timing Role: High-power unidirectional TVS used in series with fuse and MOV for coordinated multi-stage protection architecture. Use Value: Provides precise 10.2 V standoff and 16.7 V clamping to avoid false triggering while handling 35.9 A pulses without degradation. |
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, but lower 400 W PPPM; VC = 19.9 V at 21.7 A | Lower surge margin; suitable only for non-automotive, non-industrial environments with reduced threat levels | Select SMAJ12A only if system-level surge testing does not exceed IEC 61000-4-5 Level 2 (1 kV) |
| 1.5SMC12A | Larger SMC (DO-214AB) package; same 12 V VBR, but higher 1500 W PPPM and VC = 18.2 V at 83.3 A | Requires larger PCB footprint and higher thermal mass; better for high-energy industrial motor drives | Choose 1.5SMC12A when board space permits and surge energy exceeds 600 W, e.g., factory automation I/O modules |
Compared with SMAJ12A and 1.5SMC12A, the P6SMB12A-E3/52 delivers optimal balance of 600 W surge capability, compact SMB footprint, and tight 11.4–12.6 V VBR tolerance - making it preferred for space-constrained 12 V systems requiring repeatable clamping performance without layout redesign.
Availability
P6SMB12A-E3/52 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC inputs, consumer power adapter outputs, and telecom DC distribution requiring stable component supply with RoHS-compliant, commercial-grade traceability.
Supply support for P6SMB12A-E3/52 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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive qualification.
The P6SMB Series targets high-volume transient suppression in automotive, industrial, and consumer applications, engineered for automated placement, thermal robustness, and consistent clamping performance across temperature and life cycles.
FAQ
What is the maximum clamping voltage of the P6SMB12A-E3/52 under surge conditions?
The P6SMB12A-E3/52 has a maximum clamping voltage (VC) of 16.7 V at 35.9 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per standard test conditions and ensures downstream components see no more than 16.7 V during a full 600 W transient event. The P6SMB12A-E3/52 maintains this clamping performance across its specified operating temperature range.
Is the P6SMB12A-E3/52 suitable for automotive applications?
The P6SMB12A-E3/52 is RoHS-compliant and rated for operation from −65 °C to +150 °C, meeting baseline automotive ambient requirements. While the base P6SMB12A-E3/52 is commercial grade, Vishay offers AEC-Q101 qualified versions (e.g., P6SMB12AHE3_B) with identical electrical specs. For production automotive use, specify the HE3 or HM3 suffix variant - the P6SMB12A-E3/52 itself is appropriate for prototyping and non-safety-critical subsystems.
How does the P6SMB12A-E3/52 differ from bidirectional TVS diodes like P6SMB12CA?
The P6SMB12A-E3/52 is unidirectional and functions only during positive transients on the cathode relative to anode; it blocks reverse voltage like a standard diode. In contrast, P6SMB12CA is bidirectional and clamps both polarities symmetrically. Use the P6SMB12A-E3/52 on DC rails where polarity is fixed (e.g., 12 V supply), and P6SMB12CA on AC or data lines like RS-485 where voltage swings both ways. Their VBR, VWM, and VC values differ accordingly.
What is the thermal resistance and how does it affect PCB layout for the P6SMB12A-E3/52?
The P6SMB12A-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads per terminal. To sustain repetitive surges, increase copper area or add thermal vias - doubling pad size reduces RθJA by ~20–30 %. Layout directly impacts safe operating area: insufficient copper causes junction overheating and premature failure during burst-mode transients. Always verify thermal performance using the P6SMB12A-E3/52's derating curve (Fig. 2).
Does the P6SMB12A-E3/52 require external current limiting?
No, the P6SMB12A-E3/52 does not require external current limiting for transient suppression. It is designed to self-limit surge current via avalanche conduction once VWM is exceeded. However, a series impedance (e.g., fuse or PTC) is recommended upstream to prevent sustained overcurrent during fault conditions such as shorted downstream circuitry. The P6SMB12A-E3/52 handles only transient energy - not continuous overvoltage - and must be paired with proper system-level protection architecture.
P6SMB12A-E3/52 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-E3/52 FAQ
1.How can I place an order for P6SMB12A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for P6SMB12A-E3/52 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 P6SMB12A-E3/52 reliable?
The price and inventory of P6SMB12A-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P6SMB12A-E3/52 is usually 5 days.
3.What payment methods are accepted for P6SMB12A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P6SMB12A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P6SMB12A-E3/52?
P6SMB12A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P6SMB12A-E3/52 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 P6SMB12A-E3/52?
For technical support, including P6SMB12A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P6SMB12A-E3/52 requirements.
6.How does Aetrix verify that P6SMB12A-E3/52 is sourced from the original manufacturer or authorized distributors?
All P6SMB12A-E3/52 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 P6SMB12A-E3/52 meets industry standards.
7.What is the process for return or replacement of P6SMB12A-E3/52?
All P6SMB12A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with P6SMB12A-E3/52, 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 P6SMB12A-E3/52 part is unused and in its original packaging.
Return procedure for P6SMB12A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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