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Vishay General Semiconductor - Diodes Division SMB10J18AHM3/I
- Part No.:
- SMB10J18AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J18AHM3/I.pdf
- Description:
- TVS DIODE 18VWM 29.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,916
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Product details
Overview
SMB10J18AHM3/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 at 1 mA), 1000 W peak pulse power (10/1000 µs), 34.2 A peak pulse current (IPPM), and clamps transients to ≤29.2 V at rated surge. It is AEC-Q101 qualified and used in automotive sensor interface protection.
For engineers reviewing the SMB10J18AHM3/I datasheet, SMB10J18AHM3/I pinout, SMB10J18AHM3/I application, or SMB10J18AHM3/I equivalent, this page delivers verified electrical specs, automotive-grade qualification status, thermal resistance data, clamping performance under standardized surge waveforms, and direct alternatives with documented parameter differences.
Technical Context
This TVS diode operates as a voltage-clamping device across protected circuit nodes, activating when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response (<1 ns), while low incremental surge resistance enables effective energy diversion during 10/1000 µs transients.
Designed for surface-mount automated assembly, it meets MSL Level 1 (260 °C reflow peak) and supports automotive reliability requirements via AEC-Q101 qualification. Thermal resistance is characterized at RθJA = 72 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W, enabling accurate junction temperature estimation under surge duty cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR (min/max) | 20.0 V / 22.1 V at 1 mA - Confirmed breakdown range ensures reliable turn-on without premature conduction. |
| IPPM | 34.2 A (10/1000 µs) - Peak surge current capability determines survivability against ISO 7637-2 Pulse 1/2a/5a events. |
| VC | ≤29.2 V at IPPM - Clamping voltage defines maximum stress imposed on downstream ICs during surge. |
| PPPM | 1000 W (10/1000 µs) - Peak pulse power rating validates suitability for high-energy automotive load-dump suppression. |
| TJ max | +150 °C - Maximum junction temperature supports operation in under-hood environments with sustained thermal stress. |
| RθJA | 72 °C/W - Thermal resistance enables thermal design validation using standard PCB pad layout (0.2" × 0.2" copper). |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, unidirectional polarity with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H). Matte tin-plated leads, J-STD-002 solderable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line; conducts transient energy to ground when VREV > VBR. |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping current path. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| Glass passivated junction | Ensures long-term stability of leakage current (<1.0 µA) and breakdown voltage over temperature and life cycle. |
| Low profile SMB package | Enables high-density PCB layouts and compatibility with standard SMT pick-and-place equipment. |
| MSL Level 1 rating | Supports single-reflow assembly at 260 °C peak without moisture-induced damage or delamination. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Fulfills environmental compliance requirements for global automotive and industrial supply chains. |
Applications
| Automotive Sensor Protection | Power Rail Surge Suppression |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from ESD and load dump in vehicle ECUs. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between signal line and ground, activated only during overvoltage events. Use Value: Limits transient voltage to ≤29.2 V, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs per ISO 10605 and ISO 7637-2. |
Use Scenario: Safeguarding 12 V power rails feeding microcontrollers and power management ICs in infotainment head units. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing load-dump surges up to 1000 W without degradation. Use Value: Maintains rail integrity during 12 V system transients by clamping within 1 ns and surviving ≥1000 surges at rated IPPM. |
| Industrial Motor Drive I/O | Consumer Power Adapter Input Stage |
Use Scenario: Shielding digital I/O lines of PLC modules from inductive switching spikes generated by solenoids and contactors. IC Role / Device Role / Timing Role: Standoff-rated (18 V) protector placed at connector entry point, shunting transients before reaching isolation barriers. Use Value: Withstands repetitive 34.2 A surges and maintains <1.0 µA leakage at 18 V, ensuring signal integrity in noisy factory environments. |
Use Scenario: Secondary-side transient suppression on 5 V/9 V output rails of wall-mounted AC/DC adapters for smart home devices. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS minimizing signal distortion while meeting IEC 61000-4-5 Level 3 immunity. Use Value: Delivers 1000 W surge handling in compact SMB footprint, eliminating need for larger DO-214AB alternatives without sacrificing board space. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18AHE3/A | Same VWM (18 V), identical VBR range (20.0–22.1 V), but rated at 600 W PPPM and 22.5 A IPPM; non-AEC-Q101, commercial-grade only. | Limited to non-automotive industrial or consumer use where lower surge immunity suffices. | Select when cost sensitivity outweighs automotive qualification and 1000 W surge headroom is unnecessary. |
| SMCJ18A-HM3 | Same VWM/VBR, but in larger SMC (DO-214AB) package; rated at 1500 W PPPM and 54.3 A IPPM; also AEC-Q101 qualified. | Requires larger PCB area and higher thermal mass; suited for higher-energy systems like battery management or ADAS radar supplies. | Choose when system-level surge testing exceeds 1000 W or when enhanced thermal dissipation is required in high-ambient environments. |
Compared with SMBJ18AHE3/A, SMB10J18AHM3/I delivers +67% peak power handling and automotive qualification; versus SMCJ18A-HM3, it trades 50% lower surge rating for 40% smaller footprint and identical AEC-Q101 compliance-ideal for space-constrained automotive modules.
Availability
SMB10J18AHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial motor drive I/O protection, and consumer power adapter secondary-side surge suppression requiring stable component supply, halogen-free compliance, and AEC-Q101 traceability.
Supply support for SMB10J18AHM3/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMB10J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power-density transient suppression in automotive, industrial, and computing applications where compact size and AEC-Q101 validation are critical.
FAQ
What is the clamping voltage of SMB10J18AHM3/I at its rated peak pulse current?
The SMB10J18AHM3/I clamps to a maximum of 29.2 V when subjected to its rated 34.2 A peak pulse current (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 standards and guarantees that downstream 3.3 V or 5 V ICs remain within safe operating limits during surge events. The SMB10J18AHM3/I datasheet specifies this as VC at IPPM, confirmed across production lots and temperature ranges.
Is SMB10J18AHM3/I suitable for automotive applications?
Yes, SMB10J18AHM3/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials (HM3 suffix). It is explicitly intended for automotive use cases including engine control, body electronics, and sensor interface protection. Its thermal resistance (RθJA = 72 °C/W), 150 °C max junction temperature, and MSL Level 1 rating further validate its suitability for under-hood and dashboard environments.
What does the "HM3" suffix indicate in SMB10J18AHM3/I?
The "HM3" suffix in SMB10J18AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade "E3" or "M3" versions and confirms compliance with automotive environmental and reliability standards. The "I" indicates 13-inch tape-and-reel packaging (3200 units per reel), supporting high-volume SMT assembly.
How does SMB10J18AHM3/I differ from SMBJ18AHE3/A?
SMB10J18AHM3/I provides 1000 W peak pulse power and AEC-Q101 qualification, whereas SMBJ18AHE3/A offers only 600 W and is commercial-grade. Both share identical VWM (18 V) and VBR (20.0–22.1 V), but SMB10J18AHM3/I delivers +67% surge energy handling and automotive traceability-critical for Tier 1 suppliers validating to ISO/TS 16949.
What is the maximum reverse leakage current for SMB10J18AHM3/I at its stand-off voltage?
The SMB10J18AHM3/I exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 18 V stand-off voltage (VWM) and 25 °C ambient temperature. This low leakage ensures minimal power loss in always-on automotive circuits and prevents false triggering in high-impedance sensor bias networks. The value is guaranteed per Vishay's electrical characteristics table and verified across temperature extremes.
SMB10J18AHM3/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:
- 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:
- 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/I FAQ
1.How can I place an order for SMB10J18AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J18AHM3/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/I reliable?
The price and inventory of SMB10J18AHM3/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/I is usually 5 days.
3.What payment methods are accepted for SMB10J18AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J18AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J18AHM3/I?
SMB10J18AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J18AHM3/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/I?
For technical support, including SMB10J18AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J18AHM3/I requirements.
6.How does Aetrix verify that SMB10J18AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMB10J18AHM3/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/I meets industry standards.
7.What is the process for return or replacement of SMB10J18AHM3/I?
All SMB10J18AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J18AHM3/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/I part is unused and in its original packaging.
Return procedure for SMB10J18AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J18AHM3/I Tags
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