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Vishay General Semiconductor - Diodes Division SMB10J18AHE3_B/H
- Part No.:
- SMB10J18AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J18AHE3_B/H.pdf
- Description:
- 1KW,18V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,903
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Product details
Overview
SMB10J18AHE3_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 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, 1000 W peak pulse power (10/1000 µs), 34.2 A peak pulse current (IPPM), and clamps to ≤29.2 V at rated surge. It is AEC-Q101 qualified and used in automotive sensor interface protection.
For engineers reviewing the SMB10J18AHE3_B/H datasheet, SMB10J18AHE3_B/H pinout, SMB10J18AHE3_B/H application, or SMB10J18AHE3_B/H equivalent, key selection criteria include clamping voltage under 30 V, unidirectional polarity with cathode band marking, AEC-Q101 qualification for automotive use, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR (~21 V), it avalanches rapidly (<1 ns response) to divert surge current away from downstream ICs. Its low incremental surge resistance ensures minimal voltage overshoot during transient events.
Thermal performance is defined by RθJA = 72 °C/W and RθJL = 20 °C/W, supporting operation up to TJ = +150 °C. The glass-passivated junction and matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - Maximum continuous reverse operating voltage before leakage exceeds 1.0 µA |
| VBR min/max | 20.0 V / 22.1 V at IT = 1 mA - Ensures reliable turn-on within tight tolerance for consistent clamping behavior |
| VC @ IPPM | ≤29.2 V at IPPM = 34.2 A - Clamping voltage limits stress on protected 24 V automotive circuits |
| PPPM | 1000 W (10/1000 µs) - Withstands high-energy transients common in load-dump and inductive switching events |
| IFSM | 100 A (8.3 ms half-sine) - Supports robust surge handling without bond-wire fusing |
| TJ max | +150 °C - Enables deployment in under-hood automotive environments |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking on one end. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); terminals are matte tin-plated for lead-free reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to lower-potential side (e.g., ground or return) in unidirectional configuration |
| Cathode (marked) | Reverse-biased clamping node | Connected to protected line (e.g., 12 V/24 V rail or sensor output); avalanche occurs here during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMB package | Enables high-density PCB layouts and compatibility with standard SMT pick-and-place equipment |
| Glass-passivated junction | Provides stable VBR over lifetime and improved moisture resistance vs. epoxy-passivated alternatives |
| AEC-Q101 qualification | Validates suitability for automotive applications including engine control units and ADAS sensor interfaces |
| MSL Level 1 (260 °C peak) | Eliminates pre-bake requirement for lead-free reflow assembly, reducing manufacturing complexity |
| 1000 W peak pulse rating | Meets ISO 7637-2 Pulse 5a (load dump) requirements for 24 V systems without derating |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog outputs of pressure or temperature sensors in engine bay modules exposed to ISO 7637-2 load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between sensor VOUT and ground, clamping transients before they reach ADC input or signal conditioner. Use Value: Limits clamped voltage to ≤29.2 V, preventing damage to 3.3 V or 5 V signal chain components while maintaining signal integrity during normal operation. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers subjected to inductive kickback from solenoid valves and contactors. IC Role / Device Role / Timing Role: Front-end transient suppressor on each isolated input channel, absorbing repetitive 10/1000 µs surges up to 1000 W. Use Value: Extends system uptime by eliminating false triggering and component failure caused by field-induced transients in factory automation environments. |
| DC Power Rail Protection | Automotive Body Control Module |
Use Scenario: Secondary overvoltage protection on 12 V/24 V supply rails feeding microcontrollers and CAN transceivers in infotainment and telematics units. IC Role / Device Role / Timing Role: Standoff-rated TVS (VWM = 18 V) placed after primary filtering, acting as last-line defense against fast-rising transients. Use Value: Prevents latch-up or permanent damage to downstream PMICs and processors by clamping surges to <29.2 V within nanoseconds. | Use Scenario: Protecting LIN bus transceiver inputs and door module switch inputs from ESD and cable discharge events per ISO 10605. IC Role / Device Role / Timing Role: AEC-Q101-qualified unidirectional TVS mounted directly at connector entry points on BCM PCBs. Use Value: Meets automotive EMC requirements while enabling compact layout due to SMB footprint and no external biasing needed. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18AHE3_A/H | Same VWM (18 V), identical SMB package, but rated for 600 W PPPM (vs. 1000 W) | Lower surge capability; suitable only for non-load-dump scenarios like ESD or low-energy switching noise | Select SMB10J18AHE3_B/H when protecting against ISO 7637-2 Pulse 5a; choose SMBJ18AHE3_A/H for cost-sensitive consumer applications with milder threats |
| 1.5SMC18AH | Same VWM and VBR range, but in larger SMC (DO-214AB) package; 1500 W PPPM rating | Requires more PCB area; higher thermal mass supports longer surge duration but less compatible with fine-pitch automotive layouts | Prefer SMB10J18AHE3_B/H for space-constrained automotive modules; use 1.5SMC18AH where board real estate allows and higher energy margin is required |
Compared with SMBJ18AHE3_A/H and 1.5SMC18AH, SMB10J18AHE3_B/H uniquely delivers 1000 W surge capability in the compact SMB footprint with AEC-Q101 validation-making it optimal for modern automotive electronics where size, reliability, and high-energy immunity must coexist.
Availability
SMB10J18AHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and DC power rail protection requiring stable component supply across production lifecycles.
Supply support for SMB10J18AHE3_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, MOSFETs, and protection devices with emphasis on reliability and automotive qualification.
The SMB10J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density transient suppression in harsh automotive and industrial environments where AEC-Q101 compliance and 1000 W surge handling are mandatory.
FAQ
What is the clamping voltage of SMB10J18AHE3_B/H at its rated peak pulse current?
The SMB10J18AHE3_B/H clamps to a maximum of 29.2 V when subjected to its rated peak pulse current of 34.2 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 SMB10J18AHE3_B/H achieves this clamping performance while maintaining low dynamic impedance, ensuring effective energy diversion without overstressing downstream components.
Is SMB10J18AHE3_B/H suitable for automotive applications?
Yes, SMB10J18AHE3_B/H is AEC-Q101 qualified and explicitly designated for automotive use via its HE3 suffix. It meets requirements for temperature cycling, high-temperature reverse bias, and mechanical shock relevant to engine control units, body control modules, and ADAS sensor interfaces. The SMB10J18AHE3_B/H also complies with MSL Level 1 for lead-free reflow, supporting modern automotive manufacturing processes without pre-bake steps.
What does the "HE3" and "B/H" suffix in SMB10J18AHE3_B/H indicate?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification; "B/H" specifies packaging: "B" indicates tape-and-reel format, and "H" identifies the 7-inch reel size containing 750 units. This ordering code ensures traceability, automotive-grade reliability, and compatibility with high-speed SMT assembly lines. The SMB10J18AHE3_B/H full part number maps precisely to Vishay's documented preferred P/N for automotive-grade SMB TVS diodes.
How does SMB10J18AHE3_B/H differ from bidirectional TVS diodes like SMB8J18CA?
The SMB10J18AHE3_B/H is unidirectional and optimized for DC rail protection where polarity is fixed (e.g., 24 V supply to ground), offering 1000 W peak pulse power. In contrast, SMB8J18CA is bidirectional with symmetrical breakdown, rated for 800 W, and suited for AC or floating signal lines. The SMB10J18AHE3_B/H provides lower clamping voltage in forward conduction mode and supports higher surge current in its intended polarity-making it superior for automotive power rail applications.
What is the thermal resistance of SMB10J18AHE3_B/H, and how does it affect PCB layout?
SMB10J18AHE3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain TJ ≤ 150 °C under worst-case surge duty, designers must provide adequate copper area and avoid excessive ambient temperature buildup. The SMB10J18AHE3_B/H datasheet specifies minimum pad dimensions and recommends thermal vias for high-reliability automotive deployments.
SMB10J18AHE3_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)
SMB10J18AHE3_B/H FAQ
1.How can I place an order for SMB10J18AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J18AHE3_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 SMB10J18AHE3_B/H reliable?
The price and inventory of SMB10J18AHE3_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 SMB10J18AHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMB10J18AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J18AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J18AHE3_B/H?
SMB10J18AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J18AHE3_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 SMB10J18AHE3_B/H?
For technical support, including SMB10J18AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J18AHE3_B/H requirements.
6.How does Aetrix verify that SMB10J18AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMB10J18AHE3_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 SMB10J18AHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMB10J18AHE3_B/H?
All SMB10J18AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J18AHE3_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 SMB10J18AHE3_B/H part is unused and in its original packaging.
Return procedure for SMB10J18AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J18AHE3_B/H Tags
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