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Vishay General Semiconductor - Diodes Division SMB10J18AHM3_B/H
- Part No.:
- SMB10J18AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J18AHM3_B/H.pdf
- Description:
- 1KW,18V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,026
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Product details
Overview
SMB10J18AHM3_B/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection with 1000 W peak pulse power (10/1000 µs), 18 V stand-off voltage (VWM), and 29.2 V clamping voltage (VC) at 34.2 A peak pulse current. It is AEC-Q101 qualified and used to protect automotive sensor signal lines, MOSFET gates, and microcontroller I/O against inductive switching transients.
For engineers reviewing the SMB10J18AHM3_B/H datasheet, SMB10J18AHM3_B/H pinout, SMB10J18AHM3_B/H application, or SMB10J18AHM3_B/H equivalent, this part is selected for robust, low-profile, surface-mount overvoltage protection in automotive-grade power and signal paths where clamping performance, thermal reliability, and halogen-free compliance are critical.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, triggered when reverse voltage exceeds its 20.0–22.1 V breakdown range (VBR at 1 mA). Its glass-passivated junction ensures stable leakage (<1.0 µA at 18 V) and fast response (<1 ns), enabling protection of sensitive CMOS inputs without signal distortion.
Thermally, it features RθJL = 20 °C/W and RθJA = 72 °C/W on standard 5.0 mm × 5.0 mm copper pads, supporting continuous operation up to TJ = 150 °C. The HM3 suffix confirms halogen-free, RoHS-compliant, and AEC-Q101-qualified construction per JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line bias margin. |
| VBR (min/max) | 20.0 V / 22.1 V - Breakdown occurs within this range at 1 mA test current; ensures consistent turn-on threshold across production lots. |
| VC @ IPPM | 29.2 V - Clamped voltage at 34.2 A peak pulse current (10/1000 µs); limits downstream IC stress during ESD or load dump events. |
| PPPM | 1000 W - Peak pulse power handling capability; supports high-energy transients common in automotive 12 V systems. |
| ID @ VWM | <1.0 µA - Reverse leakage at 18 V; minimizes standby power loss and avoids false triggering in low-current sensor interfaces. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments with minimal derating. |
| Package | SMB (DO-214AA) - Industry-standard surface-mount outline (5.21 mm × 4.06 mm × 2.20 mm); compatible with automated pick-and-place and reflow. |
Pinout & Package
SMB10J18AHM3_B/H uses the standard SMB (DO-214AA) package: molded plastic case with matte tin-plated leads, cathode indicated by a color band at one end. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per JEDEC recommendations.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-impedance return path; forms clamping loop with cathode during transient events. |
| Cathode | Protected line input | Connected to the signal or power line being protected; conducts avalanche current to anode when VREV > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensor modules under temperature cycling, humidity, and mechanical shock stress. |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations and eliminates corrosive halogen emissions during PCB reflow or end-of-life incineration. |
| Low incremental surge resistance | Enables tighter clamping (VC/VBR ratio = 1.46) and higher energy absorption without voltage overshoot during fast-rising transients. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without moisture-related popcorning or delamination risk. |
| Glass-passivated junction | Provides stable VBR tolerance, low leakage drift over time, and immunity to surface contamination in harsh industrial environments. |
Applications
| Automotive Sensor Protection | Power Supply Input Clamping |
|---|---|
|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine compartments exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between sensor output and MCU input to clamp transients before they reach ESD-sensitive ADC front-ends. Use Value: Limits induced voltage to ≤29.2 V during 34.2 A surges, preventing latch-up or permanent damage to 3.3 V/5 V interface circuitry. |
Use Scenario: Safeguarding 12 V DC input rails of infotainment head units and body control modules against battery reversal and jump-start spikes. IC Role / Device Role / Timing Role: Primary overvoltage clamp on main power entry point, coordinated with upstream fuses and downstream LDOs. Use Value: Absorbs 1000 W surges without failure, maintaining system uptime while meeting OEM requirements for ASIL-B-compatible protection. |
| Industrial Motor Drive I/O | Consumer USB Power Port |
|
Use Scenario: Shielding digital I/O lines (e.g., PWM enable, fault feedback) in variable-frequency drives from inductive kickback generated by contactor switching. IC Role / Device Role / Timing Role: Fast-response TVS on isolated GPIO traces interfacing with PLC controllers or safety relays. Use Value: Responds in <1 ns to sub-microsecond transients, ensuring logic-level integrity and avoiding spurious shutdown commands. |
Use Scenario: Adding secondary surge protection on USB Type-A VBUS lines in portable docking stations subjected to hot-plug and cable-induced noise. IC Role / Device Role / Timing Role: Secondary clamp after primary common-mode choke and inline fuse, targeting differential-mode overvoltage events. Use Value: Maintains VWM = 18 V margin above 5 V nominal, allowing clean operation during normal USB charging while clamping >20 V faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB10J18AHE3_B/H | Same electrical specs but RoHS-compliant (E3) instead of halogen-free (HM3); no AEC-Q101 qualification. | Approved for commercial-grade automotive modules not requiring halogen-free or full AEC-Q101 validation. | Select when cost sensitivity outweighs halogen-free mandate and AEC-Q101 is not contractually required. |
| SMBJ18A-M3/5B | Identical SMB package and VWM/VC specs, but rated for 600 W PPPM (lower surge capacity) and non-AEC-Q101. | Suitable for consumer electronics or industrial controls where 1000 W surge immunity is not mandated. | Choose for lower-cost alternatives in non-automotive designs with moderate transient exposure. |
Compared with SMB10J18AHM3_B/H, SMB10J18AHE3_B/H lacks halogen-free certification and AEC-Q101 validation, while SMBJ18A-M3/5B offers reduced surge rating and no automotive qualification-making SMB10J18AHM3_B/H the only option meeting full AEC-Q101 + halogen-free + 1000 W requirements.
Availability
SMB10J18AHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor protection, power supply input clamping, and industrial motor drive I/O requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMB10J18AHM3_B/H 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, power density, and automotive-grade validation.
The SMB10J series targets high-reliability transient suppression in space-constrained automotive and industrial systems, delivering 1000 W surge capability in the compact SMB footprint with AEC-Q101 and halogen-free assurance.
FAQ
What is the clamping voltage of SMB10J18AHM3_B/H at its rated peak pulse current?
The SMB10J18AHM3_B/H has a maximum clamping voltage (VC) of 29.2 V when subjected to its rated peak pulse current of 34.2 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components see limited overvoltage during surge events. The SMB10J18AHM3_B/H maintains this clamping performance across its qualified temperature range and lifetime.
Is SMB10J18AHM3_B/H suitable for automotive applications?
Yes, SMB10J18AHM3_B/H is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials (HM3 suffix), making it approved for automotive use in engine control, body electronics, and ADAS sensor modules. Its thermal resistance (RθJL = 20 °C/W) and 150 °C max junction temperature support under-hood deployment. The SMB10J18AHM3_B/H meets all stress tests defined in AEC-Q101 Rev D, including temperature cycling and mechanical shock.
How does the HM3 suffix differ from the HE3 or E3 suffix in the SMB10J18A family?
The HM3 suffix on SMB10J18AHM3_B/H denotes halogen-free, RoHS-compliant, and AEC-Q101-qualified construction. In contrast, HE3 is RoHS-compliant and AEC-Q101 qualified but not halogen-free, while E3 is RoHS-compliant and commercial-grade only. All three share identical electrical specs and SMB packaging, but only SMB10J18AHM3_B/H satisfies full automotive environmental and reliability mandates including JESD201 Class 2 whisker resistance.
What is the reverse leakage current of SMB10J18AHM3_B/H at its stand-off voltage?
The SMB10J18AHM3_B/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 18 V stand-off voltage (VWM), measured at 25 °C. This low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes standby power loss in battery-powered systems. The SMB10J18AHM3_B/H maintains leakage below 5 µA up to 125 °C per characterization data.
Can SMB10J18AHM3_B/H be used in bidirectional configurations?
No, SMB10J18AHM3_B/H is a unidirectional TVS diode, as confirmed by its part number structure (no "C" suffix) and electrical specifications listing only unidirectional parameters (e.g., IFSM = 100 A, single-polarity VBR). For bidirectional protection at 18 V, the functionally matched part is SMB8J18CAHM3_B/H, which provides symmetrical clamping but with lower 800 W peak pulse power rating.
SMB10J18AHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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/H FAQ
1.How can I place an order for SMB10J18AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J18AHM3_B/H 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/H reliable?
The price and inventory of SMB10J18AHM3_B/H 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/H is usually 5 days.
3.What payment methods are accepted for SMB10J18AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J18AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J18AHM3_B/H?
SMB10J18AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J18AHM3_B/H 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/H?
For technical support, including SMB10J18AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J18AHM3_B/H requirements.
6.How does Aetrix verify that SMB10J18AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMB10J18AHM3_B/H 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/H meets industry standards.
7.What is the process for return or replacement of SMB10J18AHM3_B/H?
All SMB10J18AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J18AHM3_B/H, 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/H part is unused and in its original packaging.
Return procedure for SMB10J18AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J18AHM3_B/H Tags
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Diodes Incorporated
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Diodes Incorporated
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