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Vishay General Semiconductor - Diodes Division SMB10J18AHM3_B/I
- Part No.:
- SMB10J18AHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J18AHM3_B/I.pdf
- Description:
- 1KW,18V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,144
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Product details
Overview
SMB10J18AHM3_B/I from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on power and signal lines. It features a 18 V stand-off voltage (VWM), 20.0–22.1 V breakdown voltage (VBR), 1000 W peak pulse power (10/1000 µs), clamping voltage of 29.2 V at 34.2 A IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMB10J18AHM3_B/I datasheet, SMB10J18AHM3_B/I pinout, SMB10J18AHM3_B/I application, or SMB10J18AHM3_B/I equivalent, this device is selected for robust ESD and lightning surge protection in automotive sensor interfaces, DC power rails, and industrial I/O modules where low clamping voltage, fast response (<1 ns), and halogen-free RoHS compliance are critical.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, triggering when reverse voltage exceeds its breakdown threshold to divert transient energy to ground. Its glass-passivated junction ensures stable VBR tolerance (±5%), low leakage (<1.0 µA at 18 V), and reliable operation across –55 °C to +150 °C junction temperature range.
The SMB10J18AHM3_B/I uses a single PN-junction structure with cathode-band polarity marking, optimized for 10/1000 µs surge waveforms per ANSI/IEEE C62.35. Its thermal resistance (RθJL = 20 °C/W) supports sustained surge handling when mounted on 5.0 mm × 5.0 mm copper pads per recommended layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected line. |
| VBR (min/max) | 20.0 V / 22.1 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on across production lot. |
| VC @ IPPM | 29.2 V - Clamping voltage measured at 34.2 A peak pulse current; determines maximum voltage seen by downstream IC during surge. |
| PPPM | 1000 W - Peak pulse power rating for 10/1000 µs waveform; quantifies single-event surge energy absorption capability. |
| ID @ VWM | <1.0 µA - Reverse leakage at rated stand-off voltage; ensures minimal quiescent power loss and signal integrity in high-impedance circuits. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Molding compound meets UL 94 V-0. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-impedance return path; completes shunt path during transient event. |
| Cathode | Protected line input terminal | Connected to line being protected (e.g., 12 V rail or sensor output); reverse-biased during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMB package | Enables automated SMT placement and fits tight board spaces (max height 2.20 mm), compatible with standard reflow profiles up to 260 °C peak. |
| Glass-passivated junction | Ensures stable electrical parameters over time and temperature, with reduced parameter drift vs. epoxy-passivated alternatives. |
| AEC-Q101 qualification (HM3 suffix) | Confirms suitability for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| 1000 W peak pulse power | Handles ISO 7637-2 Pulse 1 (inductive switch-off) and IEC 61000-4-5 Combination Wave surges without degradation. |
| Halogen-free & RoHS-compliant | Fulfills environmental compliance requirements for global automotive and industrial OEMs without compromising surge performance. |
Applications
| Automotive Sensor Protection | DC Power Rail Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between signal line and chassis ground, responding in sub-nanosecond time. Use Value: Limits voltage excursion to ≤29.2 V during 34.2 A surge, preventing latch-up or permanent damage to 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding 12 V and 24 V supply inputs in infotainment head units, telematics modules, and lighting controllers against ISO 16750-2 load dump. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power entry point, coordinated with upstream fusing and downstream LDOs. Use Value: Absorbs up to 1000 W transient energy while maintaining clamping below 30 V, preserving downstream regulator input ratings. |
| Industrial I/O Protection | Consumer Power Adapter Interface |
Use Scenario: Shielding PLC digital input channels and RS-485 transceivers from field-induced surges in factory automation systems. IC Role / Device Role / Timing Role: Line-side TVS on isolated or non-isolated I/O terminals, placed before signal conditioning circuitry. Use Value: Withstands repeated 1 kV/500 A surges per IEC 61000-4-5 Level 3, ensuring long-term reliability in harsh EMI environments. |
Use Scenario: Guarding USB-C PD and legacy barrel jack inputs in smart home hubs and portable audio devices against user-handling ESD. IC Role / Device Role / Timing Role: First-line ESD suppressor at connector entry, rated for ±30 kV contact discharge per IEC 61000-4-2. Use Value: Sub-1 ns response and <1 µA leakage preserve battery life and signal fidelity in always-on consumer electronics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB10J18AHE3_B/I | Same electrical specs but RoHS-compliant commercial grade (non-AEC-Q101); no halogen-free certification. | Approved for industrial/commercial designs lacking automotive qualification requirements. | Select when AEC-Q101 is not mandated and cost sensitivity favors standard E3 suffix. |
| SMBJ18A-T | Identical VWM/VBR/VC/PPPM specs; same SMB package; manufactured by Diodes Inc.; JEDEC-registered marking "1BT". | Validated in same automotive and industrial reference designs; widely stocked in North America and Asia. | Choose for dual-sourcing flexibility and regional inventory availability without design change. |
Compared with SMB10J18AHM3_B/I, the HE3 variant lacks AEC-Q101 validation and halogen-free status, while SMBJ18A-T offers identical protection performance with broader distributor coverage-making it suitable for cross-qualification without layout or BOM revision.
Availability
SMB10J18AHM3_B/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface development, and consumer power adapter qualification requiring stable component supply and full traceability.
Supply support for SMB10J18AHM3_B/I 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, efficiency, and application-specific optimization.
The SMB10J series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density transient suppression in automotive, industrial, and computing systems where space-constrained, high-energy clamping is required.
FAQ
What is the clamping voltage of SMB10J18AHM3_B/I at its rated peak pulse current?
The SMB10J18AHM3_B/I has a maximum clamping voltage (VC) of 29.2 V when subjected to its peak pulse current (IPPM) of 34.2 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see no more than 29.2 V during worst-case surge events. The SMB10J18AHM3_B/I maintains this clamping performance across its qualified temperature range.
Is SMB10J18AHM3_B/I suitable for automotive applications?
Yes, SMB10J18AHM3_B/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction validated for automotive use. It meets stress tests including temperature cycling, high-temperature reverse bias, and ESD per AEC-Q101 Rev D. The SMB10J18AHM3_B/I is commonly deployed in body control modules, ADAS camera interfaces, and powertrain sensors.
What does the "HM3_B/I" suffix mean in SMB10J18AHM3_B/I?
The "HM3" denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction; "B" indicates revision level B of the device specification; "I" specifies packaging in 13-inch tape-and-reel format with 3200 units per reel. This full suffix confirms SMB10J18AHM3_B/I meets automotive environmental and logistics requirements out-of-box.
How does SMB10J18AHM3_B/I compare to bidirectional TVS diodes like SMB8J18CA?
SMB10J18AHM3_B/I is unidirectional and optimized for DC power line protection with asymmetric conduction (low forward drop only in one direction), whereas SMB8J18CA is bidirectional and suited for AC or symmetrical signal lines. SMB10J18AHM3_B/I delivers 1000 W PPPM vs. 800 W for SMB8J18CA, reflecting higher surge capacity for unidirectional use cases. Both share identical VWM and VC values.
What PCB layout guidance applies to SMB10J18AHM3_B/I for optimal thermal and electrical performance?
Mount SMB10J18AHM3_B/I on minimum 5.0 mm × 5.0 mm copper pads per terminal to achieve specified RθJL (20 °C/W) and sustain 1000 W pulses. Keep traces short and wide between the device and protected node/ground plane to minimize inductance. Avoid thermal relief on cathode/anode pads. The SMB10J18AHM3_B/I datasheet recommends 0.086" (2.18 mm) min pad width and 0.220" (5.59 mm) overall length.
SMB10J18AHM3_B/I 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):
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J18AHM3_B/I FAQ
1.How can I place an order for SMB10J18AHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J18AHM3_B/I 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 SMB10J18AHM3_B/I reliable?
The price and inventory of SMB10J18AHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J18AHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMB10J18AHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J18AHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J18AHM3_B/I?
SMB10J18AHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J18AHM3_B/I 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 SMB10J18AHM3_B/I?
For technical support, including SMB10J18AHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J18AHM3_B/I requirements.
6.How does Aetrix verify that SMB10J18AHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMB10J18AHM3_B/I 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 SMB10J18AHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMB10J18AHM3_B/I?
All SMB10J18AHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J18AHM3_B/I, 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 SMB10J18AHM3_B/I part is unused and in its original packaging.
Return procedure for SMB10J18AHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J18AHM3_B/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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