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Vishay General Semiconductor - Diodes Division SMB10J12A-E3/52
- Part No.:
- SMB10J12A-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J12A-E3/52.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMB10J12A-E3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on DC power rails and signal lines. It features a 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR), 19.9 V clamping voltage (VC) at 50.3 A peak pulse current (IPPM), and 1000 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive power supply inputs and industrial sensor interfaces.
For engineers reviewing the SMB10J12A-E3/52 datasheet, SMB10J12A-E3/52 pinout, SMB10J12A-E3/52 application, or SMB10J12A-E3/52 equivalent, key selection criteria include clamping performance under 50.3 A surge, AEC-Q101 qualification for automotive use, RoHS-compliant E3 suffix, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR (13.3–14.7 V), it avalanches to limit transient energy, clamping to ≤19.9 V at 50.3 A. Its glass-passivated junction ensures stable leakage (<5 µA at 12 V) and fast response (<1 ns), critical for safeguarding MOSFET gates and microcontroller I/O against inductive switching spikes.
Thermally, it sustains 150 °C max junction temperature with RθJA = 72 °C/W and RθJL = 20 °C/W, enabling reliable operation on standard PCB copper pads. The SMB (DO-214AA) package supports MSL Level 1 handling and 260 °C reflow peak per J-STD-020, aligning with automotive and industrial assembly requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin for 12 V systems. |
| VBR (min/max) | 13.3 V / 14.7 V - breakdown threshold range at 1 mA test current; ensures consistent avalanche initiation across production lots. |
| VC @ IPPM | 19.9 V at 50.3 A - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient overvoltage exposure. |
| PPPM | 1000 W - peak pulse power handling with 10/1000 µs waveform; enables robust protection against ISO 7637-2 Pulse 1/2/5a surges. |
| ID @ VWM | ≤5 µA - reverse leakage at 12 V; minimizes standby power loss and avoids false triggering in low-current sensor circuits. |
| TJ max. | +150 °C - maximum junction temperature; supports under-hood automotive environments and high-ambient industrial enclosures. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; required for ECUs and ADAS modules. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by color band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference node | Connected to system ground or low-side return path; completes shunt path during transient events. |
| Cathode | Protected line input | Connected to line being protected (e.g., 12 V battery rail); conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics including engine control units and body controllers; meets stress-test requirements for temperature, humidity, and life cycle. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage over time and temperature; prevents parameter drift in harsh thermal environments. |
| Low incremental surge resistance | Minimizes VC rise under high di/dt transients; delivers tighter clamping than standard Zener-based protectors. |
| MSL Level 1 rating | Enables direct placement without dry-pack or baking; compatible with standard SMT reflow profiles up to 260 °C peak. |
| RoHS-compliant E3 suffix | Meets EU RoHS Directive 2011/65/EU and JEDEC JESD201 Class 2 whisker resistance; suitable for commercial and automotive supply chains. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump and alternator ripple transients per ISO 7637-2. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between battery rail and regulator input to clamp surges before LDO or DC/DC stage. Use Value: Limits voltage to ≤19.9 V during 50.3 A transients, preventing damage to downstream PMICs and microcontrollers rated for 16 V absolute max. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: TVS connected across sensor output and ground to absorb ESD and inductive kickback from nearby solenoid switching. Use Value: Sub-20 V clamping preserves 0–10 V analog signal integrity and avoids saturation of ADC front-end op-amps during 8 kV contact ESD events. |
| DC Motor Drive Power Stage Protection | Telecom Power Supply Rail Protection |
|
Use Scenario: Shielding half-bridge MOSFET sources and gate drivers from flyback voltage spikes during motor commutation. IC Role / Device Role / Timing Role: Mounted directly at motor driver IC power input pins to suppress <100 ns turn-off transients. Use Value: Fast <1 ns response and low Rsurge ensure clamping occurs before MOSFET avalanche breakdown, extending device lifetime. |
Use Scenario: Guarding primary-side DC bus in PoE-powered network switches against lightning-induced surges on Ethernet cables. IC Role / Device Role / Timing Role: Placed across 48 V input after bridge rectifier to divert common-mode surges before DC/DC isolation stage. Use Value: 1000 W PPPM rating handles multiple 10/1000 µs surges without degradation, supporting IEC 61000-4-5 Level 3 compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12A-E3/52 | Same SMB package, identical VWM (12 V) and VC (19.9 V), but lower PPPM (600 W) and IPPM (32.4 A). | Rated for lighter-duty consumer or non-automotive industrial use; not AEC-Q101 qualified. | Select when cost sensitivity outweighs automotive qualification and 1000 W surge headroom is unnecessary. |
| 1.5SMC12A | Same electrical specs (VWM = 12 V, VC = 19.9 V), but larger SMC (DO-214AB) package with higher thermal mass and RθJA = 30 °C/W. | Better sustained power dissipation in high-temperature ambient; requires larger PCB footprint and different pad layout. | Choose when thermal derating above 85 °C ambient is critical and board space permits larger package. |
Compared with SMBJ12A-E3/52 and 1.5SMC12A, SMB10J12A-E3/52 uniquely combines AEC-Q101 qualification, 1000 W surge rating, and SMB footprint - making it optimal for space-constrained automotive modules requiring full ISO 7637-2 compliance without layout redesign.
Availability
SMB10J12A-E3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and DC motor drive protection requiring stable component supply and long-term lifecycle support.
Supply support for SMB10J12A-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, and protection devices with emphasis on reliability, precision, and automotive-grade validation.
The SMB10J series is engineered for high-power-density transient suppression in demanding environments - targeting automotive power distribution, industrial automation, and telecom infrastructure where compact size and AEC-Q101 compliance are mandatory.
FAQ
What is the clamping voltage of SMB10J12A-E3/52 at its rated peak pulse current?
The SMB10J12A-E3/52 has a maximum clamping voltage (VC) of 19.9 V at its rated peak pulse current (IPPM) of 50.3 A with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMB10J12A-E3/52 maintains this clamping performance consistently across its operational temperature range and lifetime, as verified in Vishay's qualification testing.
Is SMB10J12A-E3/52 suitable for automotive applications?
Yes, SMB10J12A-E3/52 is AEC-Q101 qualified and explicitly intended for automotive use, including engine control units, body electronics, and ADAS modules. Its E3 suffix denotes RoHS compliance and commercial-grade construction, while the underlying die and assembly process meet automotive stress-test requirements for temperature cycling, high-temperature reverse bias, and mechanical shock. The SMB10J12A-E3/52 data sheet confirms qualification status in the Mechanical Data section.
How does the SMB10J12A-E3/52 differ from the SMBJ12A-E3/52?
The SMB10J12A-E3/52 delivers 1000 W peak pulse power (PPPM) versus 600 W for SMBJ12A-E3/52, enabling higher surge energy handling without degradation. Both share identical VWM (12 V), VBR (13.3–14.7 V), and VC (19.9 V), but only SMB10J12A-E3/52 carries AEC-Q101 qualification. The SMB10J12A-E3/52 also uses a reinforced glass-passivated junction for improved long-term stability under thermal cycling - a distinction confirmed in Vishay's 88422 datasheet revision notes.
What is the maximum operating temperature for SMB10J12A-E3/52?
The SMB10J12A-E3/52 has a maximum junction temperature (TJ max.) of +150 °C, allowing continuous operation in under-hood automotive environments and high-ambient industrial settings. Its thermal resistance values - RθJA = 72 °C/W (junction-to-ambient) and RθJL = 20 °C/W (junction-to-lead) - are specified for mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads. Derating curves in the datasheet show usable power capability down to 50% at 125 °C ambient.
Does SMB10J12A-E3/52 have polarity markings, and how is it oriented on the PCB?
Yes, SMB10J12A-E3/52 is unidirectional and marked with a cathode band on the SMB (DO-214AA) package body. During PCB layout, the banded end must connect to the line being protected (e.g., 12 V rail), while the anode connects to ground. Incorrect orientation renders the device non-functional for transient suppression. The marking and polarity convention are defined in the Mechanical Data section of the Vishay document 88422 and verified on physical samples.
SMB10J12A-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 50.3A
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J12A-E3/52 FAQ
1.How can I place an order for SMB10J12A-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J12A-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 SMB10J12A-E3/52 reliable?
The price and inventory of SMB10J12A-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 SMB10J12A-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB10J12A-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J12A-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J12A-E3/52?
SMB10J12A-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J12A-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 SMB10J12A-E3/52?
For technical support, including SMB10J12A-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J12A-E3/52 requirements.
6.How does Aetrix verify that SMB10J12A-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB10J12A-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 SMB10J12A-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB10J12A-E3/52?
All SMB10J12A-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J12A-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 SMB10J12A-E3/52 part is unused and in its original packaging.
Return procedure for SMB10J12A-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J12A-E3/52 Tags
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