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Vishay General Semiconductor - Diodes Division SMB10J18AHE3/52
- Part No.:
- SMB10J18AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J18AHE3/52.pdf
- Description:
- TVS DIODE 18VWM 29.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,313
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Product details
Overview
SMB10J18AHE3/52 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 18 V stand-off voltage (VWM), 20.0–22.1 V breakdown voltage (VBR) at 1 mA, 29.2 V clamping voltage (VC) at 34.2 A peak pulse current (IPPM), and 1000 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive ECUs, industrial sensor interfaces, and power supply input stages.
For engineers reviewing the SMB10J18AHE3/52 datasheet, SMB10J18AHE3/52 pinout, SMB10J18AHE3/52 application, or SMB10J18AHE3/52 equivalent, key selection criteria include clamping performance under 100 A IFSM surge, AEC-Q101 qualification for automotive use, thermal resistance (RθJA = 72 °C/W), 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: it remains high-impedance below VWM = 18 V, then avalanches rapidly at VBR = 20.0–22.1 V to limit transients. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1 ns), critical for protecting MOSFET gates and MCU I/O against ESD and load-switching spikes.
Thermally, it sustains TJ up to +150 °C with RθJL = 20 °C/W to lead and RθJA = 72 °C/W to ambient when mounted per recommended 0.2" × 0.2" copper pad layout. The HE3 suffix confirms RoHS compliance and AEC-Q101 qualification - required for under-hood automotive modules where reliability under thermal cycling and humidity is non-negotiable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin for 24 V systems. |
| VBR (min/max) | 20.0 V / 22.1 V at IT = 1 mA - tight breakdown tolerance ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 29.2 V at IPPM = 34.2 A (10/1000 µs) - clamping level limits downstream IC stress during 1000 W surge events. |
| PPPM | 1000 W - peak pulse power rating determines survivability of lightning-induced or inductive kick transients. |
| IFSM | 100 A (8.3 ms half-sine) - surge current capability supports protection of 12–24 V power inputs against motor or relay switching. |
| Leakage ID | <1.0 µA at VWM - negligible standby current avoids battery drain in always-on automotive modules. |
| TJ max | +150 °C - enables operation in engine control units and power converters without derating in high-ambient environments. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Cathode indicated by color band; polarity-critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-voltage return path; completes shunt path during overvoltage event. |
| Cathode | High-side protected node | Connected to protected line (e.g., 24 V rail or sensor output); avalanche conduction occurs from cathode to anode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors - meets stress test requirements for temperature cycling, HAST, and mechanical shock. |
| Glass-passivated junction | Ensures stable VBR and low leakage over lifetime; eliminates risk of moisture-induced parameter drift in humid under-hood environments. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking; supports high-yield automated assembly in Tier-1 manufacturing lines. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a), improving clamping fidelity for sensitive analog front-ends. |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation meets fire-safety requirements for automotive and industrial enclosures. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs in engine control units (ECUs) against load-dump transients (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between battery rail and DC-DC converter input. Use Value: Clamps 1000 W surges to ≤29.2 V, preventing damage to upstream regulators and ensuring system reset immunity. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in PLC I/O modules exposed to field wiring noise. IC Role / Device Role / Timing Role: Bidirectional-capable unidirectional TVS placed across sensor output and ground to absorb ESD and inductive coupling. Use Value: Sub-1 µA leakage preserves signal integrity; 29.2 V clamping prevents ADC saturation during 4–20 mA loop faults. |
| Telecom DC Power Input | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Securing 48 V PoE-powered equipment inputs against lightning-induced surges on outdoor Ethernet links. IC Role / Device Role / Timing Role: Primary-level TVS on DC input stage ahead of hot-swap controller and filter capacitors. Use Value: 1000 W PPPM rating handles IEC 61000-4-5 Combination Wave (1.2/50 µs + 8/20 µs) without degradation. |
Use Scenario: Shielding microcontroller GPIOs driving brushed DC motors in smart home appliances from back-EMF spikes. IC Role / Device Role / Timing Role: Local TVS at motor driver output pins to clamp inductive kick before reaching MCU pins. Use Value: 34.2 A IPPM withstands repeated 100 A IFSM events; 20.0–22.1 V VBR aligns with 24 V motor supply rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A-E3/52 | Same SMB package and VWM = 18 V, but rated for 600 W PPPM (vs. 1000 W) and lower IPPM = 22.5 A. | Limited to lower-energy transients; not AEC-Q101 qualified - suitable for commercial-grade consumer power supplies. | Select SMBJ18A-E3/52 only if surge energy is constrained to <600 W and automotive qualification is unnecessary. |
| 1.5SMC18A | Same VWM and unidirectional function, but larger SMC (DO-214AB) package, higher thermal mass, and 1500 W PPPM rating. | Better thermal dissipation for high-duty-cycle surges; requires larger PCB footprint and different pad layout. | Choose 1.5SMC18A when board space permits and sustained surge repetition demands lower junction temperature rise. |
Compared with SMBJ18A-E3/52 and 1.5SMC18A, SMB10J18AHE3/52 uniquely delivers 1000 W surge handling in AEC-Q101-qualified SMB form factor - enabling automotive-grade protection without sacrificing compactness or manufacturability.
Availability
SMB10J18AHE3/52 is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and telecom power input protection requiring stable component supply across multi-year production cycles.
Supply support for SMB10J18AHE3/52 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, automotive qualification, and high-power density packaging.
The SMB10J series is engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 compliance and robust clamping performance are mandatory.
FAQ
What is the clamping voltage of SMB10J18AHE3/52 at its rated peak pulse current?
The SMB10J18AHE3/52 has a maximum clamping voltage (VC) of 29.2 V when subjected to its specified peak pulse current (IPPM) of 34.2 A using the 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream components such as DC-DC controllers or microcontrollers in the protected circuit.
Is SMB10J18AHE3/52 suitable for automotive applications?
Yes, SMB10J18AHE3/52 is AEC-Q101 qualified and carries the HE3 suffix denoting RoHS compliance and automotive-grade reliability. It is explicitly designed for under-hood and chassis-mounted modules, validated for temperature cycling, humidity exposure, and mechanical shock - making it appropriate for engine control units, body control modules, and ADAS sensor interfaces.
What does the "HE3" suffix mean in SMB10J18AHE3/52?
The "HE3" suffix in SMB10J18AHE3/52 indicates RoHS-compliant construction and AEC-Q101 qualification. It distinguishes this variant from commercial-grade versions (e.g., E3 or M3) and confirms compliance with automotive stress testing standards including HTOL, TC, and HAST - essential for long-term deployment in safety-critical vehicle subsystems.
How does SMB10J18AHE3/52 differ from bidirectional TVS diodes like SMB8J18CA?
SMB10J18AHE3/52 is unidirectional and optimized for DC rail protection with asymmetric conduction (anode-to-cathode only), while SMB8J18CA is bidirectional and symmetrical for AC or dual-polarity signal lines. SMB10J18AHE3/52 offers higher PPPM (1000 W vs. 800 W) and is AEC-Q101 qualified, whereas SMB8J18CA targets telecom and data-line protection where polarity reversal may occur.
What PCB pad layout is recommended for optimal thermal performance of SMB10J18AHE3/52?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad area per terminal for SMB10J18AHE3/52 to achieve rated thermal resistance (RθJA = 72 °C/W). Using smaller pads increases junction temperature during surge events and may reduce reliability; the recommended layout is documented in the mechanical drawings of datasheet 88422 and must be followed for automotive-grade thermal validation.
SMB10J18AHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 29.2V
- Current - Peak Pulse (10/1000µs):
- 34.2A
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J18AHE3/52 FAQ
1.How can I place an order for SMB10J18AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J18AHE3/52 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 SMB10J18AHE3/52 reliable?
The price and inventory of SMB10J18AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J18AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB10J18AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J18AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J18AHE3/52?
SMB10J18AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J18AHE3/52 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 SMB10J18AHE3/52?
For technical support, including SMB10J18AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J18AHE3/52 requirements.
6.How does Aetrix verify that SMB10J18AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB10J18AHE3/52 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 SMB10J18AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB10J18AHE3/52?
All SMB10J18AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J18AHE3/52, 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 SMB10J18AHE3/52 part is unused and in its original packaging.
Return procedure for SMB10J18AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J18AHE3/52 Tags
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