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Vishay General Semiconductor - Diodes Division SMB10J18-E3/5B
- Part No.:
- SMB10J18-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J18-E3/5B.pdf
- Description:
- TVS DIODE 18VWM 32.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,483
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Product details
Overview
SMB10J18-E3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AA (SMB) 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), 34.2 A peak pulse current (IPPM), and clamps transients to ≤29.2 V at rated surge. It is widely deployed in automotive power supply rails and industrial sensor interfaces.
For engineers reviewing the SMB10J18-E3/5B datasheet, SMB10J18-E3/5B pinout, SMB10J18-E3/5B application, or SMB10J18-E3/5B equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, entering avalanche conduction when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 µA at 18 V), while low incremental surge resistance enables effective energy diversion during fast transients (response time <1 ns).
The device is rated for 100 W steady-state power dissipation and exhibits thermal resistance of 72 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead). It meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, and its DO-214AA package supports high-power density mounting without derating penalties under standard pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range. |
| VBR min/max | 20.0 V / 22.1 V at 1.0 mA - Confirmed breakdown threshold window; ensures predictable turn-on across production lot. |
| VC @ IPPM | ≤29.2 V at 34.2 A - Clamping voltage under full 1000 W surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 1000 W (10/1000 µs waveform) - Peak surge energy handling capacity; validates suitability for ISO 7637-2 Pulse 1/2a/5a automotive transients. |
| ID @ VWM | ≤1.0 µA - Reverse leakage at stand-off voltage; critical for low-power sensor bias networks and battery-backed circuits. |
| TJ max | 150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and sealed industrial enclosures. |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with cathode band marking; compatible with IPC-7351B footprint. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, cathode indicated by color band on one end. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay recommended layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or return path); defines unidirectional conduction direction. |
| Cathode | Avalanche clamping node | Connected to protected line (e.g., 12 V rail or CAN_H); conducts surge current to anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics applications per stress test requirements including HTOL, TCT, and ESD. |
| Glass passivated junction | Ensures long-term VBR stability and low parameter drift over temperature and lifetime; eliminates risk of junction corrosion. |
| MSL Level 1 rating | Supports single-reflow assembly without moisture sensitivity concerns; no baking required prior to SMT placement. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ISO 16750-2 load dump spikes), improving system robustness. |
| RoHS-compliant, matte tin terminations | Enables lead-free soldering per J-STD-002/JESD 22-B102; passes JESD 201 Class 1A whisker testing for reliability. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and jump-start surges per ISO 7637-2. IC Role / Device Role / Timing Role: Parallel-connected clamping TVS placed upstream of LDO regulators and microcontrollers. Use Value: Limits transient voltage to ≤29.2 V during 1000 W surges, preventing latch-up or gate oxide damage in downstream silicon. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA loops) and digital I/O (e.g., RS-485) in factory automation sensors. IC Role / Device Role / Timing Role: Bidirectional or unidirectional surge shunt mounted at connector interface. Use Value: Sub-1 ns response and ≤1.0 µA leakage preserve signal integrity and minimize offset errors in precision measurement paths. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feed Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters subjected to lightning-induced surges on mains input. IC Role / Device Role / Timing Role: Unidirectional TVS across bulk capacitor terminals to clamp switching transients and external surges. Use Value: 1000 W rating handles repetitive 10/1000 µs surges without degradation; DO-214AA footprint fits compact adapter PCB layouts. |
Use Scenario: Protecting -48 V telecom power feeds from induced transients on long cable runs in central office equipment. IC Role / Device Role / Timing Role: High-reliability clamping element on DC input board, positioned before DC/DC converters. Use Value: AEC-Q101 qualification and 150 °C TJ rating ensure uninterrupted operation in thermally constrained telecom chassis. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A | Same DO-214AA package, identical VWM (18 V) and VC (29.2 V), but rated at 600 W PPPM (vs. 1000 W). | Limited to lower-energy transients (e.g., IEC 61000-4-5 Level 3); not suitable for automotive load dump per ISO 7637-2. | Select SMBJ18A only for cost-sensitive consumer applications where 1000 W surge immunity is not required. |
| SMCJ18A | DO-214AB (SMC) package, same electrical specs (VWM = 18 V, VC = 29.2 V), higher 1500 W PPPM rating. | Larger footprint (7.11 mm × 6.22 mm vs. 4.57 mm × 3.94 mm); requires PCB redesign but delivers higher surge margin. | Choose SMCJ18A when system-level surge testing exceeds 1000 W or when extended thermal margin is needed in high-ambient environments. |
Compared with SMBJ18A and SMCJ18A, SMB10J18-E3/5B uniquely balances 1000 W surge capability with DO-214AA space constraints and AEC-Q101 qualification-making it optimal for automotive and industrial SMT designs requiring validated reliability without footprint expansion.
Availability
SMB10J18-E3/5B is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor modules, and telecom power supply designs requiring stable component supply, AEC-Q101 compliance, and high-power transient suppression.
Supply support for SMB10J18-E3/5B 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 automotive-grade reliability and high-power density.
The SMB10J series is engineered specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 validation and 1000 W surge capability are mandatory.
FAQ
What is the polarity configuration of SMB10J18-E3/5B?
SMB10J18-E3/5B is a unidirectional TVS diode, meaning it conducts only in reverse bias above its breakdown voltage. The cathode is marked by a visible band on the DO-214AA package body, and it must be connected toward the protected line (e.g., +12 V rail), with the anode tied to ground or return path. This configuration blocks forward current and provides precise clamping during negative-going transients.
Does SMB10J18-E3/5B meet automotive qualification standards?
Yes, SMB10J18-E3/5B is AEC-Q101 qualified, having passed all required stress tests including high-temperature operating life (HTOL), temperature cycling (TCT), and electrostatic discharge (HBM/MM). Its qualification applies specifically to the E3/5B variant with matte tin terminations and DO-214AA packaging, making it suitable for use in automotive powertrain, body, and infotainment systems.
What is the maximum clamping voltage of SMB10J18-E3/5B under surge conditions?
The maximum clamping voltage (VC) of SMB10J18-E3/5B is 29.2 V when subjected to its rated peak pulse current of 34.2 A (10/1000 µs waveform). This value is guaranteed across the full operating temperature range and represents the highest voltage seen at the protected line during worst-case surge events, ensuring downstream components remain within safe operating limits.
Can SMB10J18-E3/5B be used in bidirectional protection circuits?
No, SMB10J18-E3/5B is strictly unidirectional and cannot replace bidirectional TVS diodes like SMB8J18CA. Attempting to use it in bidirectional configurations will result in forward conduction during positive transients, causing failure. For bidirectional protection at 18 V, select the SMB8J18CA variant, which has symmetrical breakdown characteristics and no polarity marking.
What is the thermal resistance profile of SMB10J18-E3/5B?
SMB10J18-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W, measured on standard 0.2" × 0.2" copper pads. These values assume proper PCB copper area and airflow; actual thermal performance depends on board layout, copper thickness, and ambient conditions. Derating curves in the Vishay datasheet (Fig. 2) must be applied above 25 °C ambient.
SMB10J18-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 32.2V
- Current - Peak Pulse (10/1000µs):
- 31.1A
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J18-E3/5B FAQ
1.How can I place an order for SMB10J18-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J18-E3/5B 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 SMB10J18-E3/5B reliable?
The price and inventory of SMB10J18-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J18-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB10J18-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J18-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J18-E3/5B?
SMB10J18-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J18-E3/5B 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 SMB10J18-E3/5B?
For technical support, including SMB10J18-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J18-E3/5B requirements.
6.How does Aetrix verify that SMB10J18-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB10J18-E3/5B 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 SMB10J18-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB10J18-E3/5B?
All SMB10J18-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J18-E3/5B, 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 SMB10J18-E3/5B part is unused and in its original packaging.
Return procedure for SMB10J18-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J18-E3/5B Tags
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