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Vishay General Semiconductor - Diodes Division SMB10J18-E3/52
- Part No.:
- SMB10J18-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J18-E3/52.pdf
- Description:
- TVS DIODE 18VWM 32.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,761
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Product details
Overview
SMB10J18-E3/52 from Vishay General Semiconductor is a unidirectional TransZORB® 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 at 1 mA), 29.2 V clamping voltage (VC) at 34.2 A peak pulse current, and 1000 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive power supply rails and industrial sensor interfaces.
For engineers reviewing the SMB10J18-E3/52 datasheet, SMB10J18-E3/52 pinout, SMB10J18-E3/52 application, or SMB10J18-E3/52 equivalent, key selection criteria include clamping performance under 1000 W surges, AEC-Q101 qualification for automotive use, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches to limit transient energy across protected circuitry. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response (<1 ns), while low incremental surge resistance enables effective suppression of inductive switching spikes and ESD events.
Thermally, it sustains operation from −55 °C to +150 °C junction temperature, with RθJA = 72 °C/W (on recommended 0.2" × 0.2" pads) and RθJL = 20 °C/W - enabling reliable derating up to 125 °C ambient per Fig. 2. The device is qualified to AEC-Q101 and meets J-STD-020 MSL Level 1 (260 °C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below clamping threshold |
| VBR (min/max) | 20.0 V / 22.1 V at IT = 1 mA - guaranteed avalanche initiation range; ensures consistent turn-on across production lots |
| VC @ IPPM | 29.2 V at 34.2 A - clamped voltage during 1000 W, 10/1000 µs surge; determines maximum stress on downstream ICs |
| PPPM | 1000 W - peak pulse power handling capability; supports IEC 61000-4-5 Level 4 (4 kV) surge immunity designs |
| IFSM | 100 A - non-repetitive forward surge current (8.3 ms half-sine); validates robustness against accidental polarity reversal |
| Junction Temp Range | −55 °C to +150 °C - enables deployment in under-hood automotive and industrial control environments |
| Leakage @ VWM | ≤1.0 µA - minimal standby power loss and signal integrity impact on high-impedance sensor lines |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, low-profile plastic case with cathode band marking; dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); UL 94 V-0 rated molding compound; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / low-side reference | Connected to ground or lower-potential rail in unidirectional clamp configuration |
| Cathode | Reverse-biased terminal / protected line interface | Connected to line being protected (e.g., 12 V battery rail); color band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive powertrain and body electronics per stress test requirements including HTOL, TCT, and ESD |
| Glass-passivated junction | Ensures stable VBR tolerance and low leakage over temperature and lifetime; eliminates passivation-related failure modes |
| MSL Level 1 (260 °C) | Supports standard lead-free reflow without moisture sensitivity concerns; no baking required prior to assembly |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving system-level immunity |
| RoHS-compliant & whisker-tested (JESD 201 Class 1A) | Meets global environmental regulations and prevents tin whisker growth in long-life automotive applications |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Clamp |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 16750-2) and alternator ripple. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed between VBAT and chassis ground. Use Value: Clamps 1000 W surges to ≤29.2 V, preventing damage to MCU power supplies and CAN transceivers. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors exposed to cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF), low-leakage TVS on 0–5 V output lines. Use Value: Sub-µA leakage at 18 V avoids sensor offset error; 29.2 V clamping preserves ADC input stage integrity. |
| Consumer Power Adapter Input Stage | Telecom DC Feed Protection |
|
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional clamp on +5 V or +12 V output rail before connector. Use Value: 1000 W rating handles IEC 61000-4-5 combination wave (1.2/50 µs + 8/20 µs) without degradation. |
Use Scenario: Protecting PoE-powered equipment front-end from induced surges on 48 V DC feed lines. IC Role / Device Role / Timing Role: Primary surge limiter on DC input before DC-DC converter. Use Value: 20–22.1 V VBR aligns with 48 V system derating; 150 °C max junction temp supports sealed enclosure use. |
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-E3/52 | Same DO-214AA package, identical VWM/VBR/VC specs, but not AEC-Q101 qualified | Restricted to commercial/industrial use; unsuitable for automotive OEM designs requiring qualification evidence | Select SMBJ18A-E3/52 only if AEC-Q101 compliance is not mandated and cost optimization is prioritized |
| 1.5SMC18A | DO-214AB (SMC) package - larger footprint (7.11 mm × 6.22 mm); same electrical specs but higher thermal mass | Requires PCB layout change; better suited for >150 W continuous dissipation scenarios due to lower RθJA | Choose 1.5SMC18A only when board space allows larger package and enhanced thermal performance is needed |
Compared with SMBJ18A-E3/52, SMB10J18-E3/52 provides certified automotive reliability without electrical trade-offs; versus 1.5SMC18A, it delivers identical protection in 30% smaller area but requires tighter thermal management on dense layouts.
Availability
SMB10J18-E3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor modules, and telecom power interface designs requiring stable component supply, AEC-Q101 validation, and RoHS-compliant manufacturing.
Supply support for SMB10J18-E3/52 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 platform, engineered specifically for high-power, high-reliability transient suppression in harsh automotive and industrial environments where surge immunity and long-term stability are critical.
FAQ
What is the clamping voltage of SMB10J18-E3/52 at its rated peak pulse current?
The SMB10J18-E3/52 has a maximum clamping voltage (VC) of 29.2 V at 34.2 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during a full-rated 1000 W transient event. The SMB10J18-E3/52 maintains this clamping performance across its qualified temperature range.
Is SMB10J18-E3/52 suitable for automotive applications?
Yes, SMB10J18-E3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including engine control, body electronics, and infotainment systems. Its construction - glass-passivated junction, MSL Level 1 reflow compatibility, JESD 201 Class 1A whisker resistance, and −55 °C to +150 °C operation - meets automotive reliability requirements. The SMB10J18-E3/52 data sheet confirms qualification per the full AEC-Q101 stress test schedule.
What does the "-E3/52" suffix indicate in SMB10J18-E3/52?
The "-E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin terminations meeting J-STD-002 solderability and JESD 201 Class 1A whisker testing. The "/52" indicates packaging in 7" diameter plastic tape and reel, with 750 units per reel - standard for SMT automation. This full suffix distinguishes SMB10J18-E3/52 from AEC-Q101-qualified variants (e.g., -HE3/52) and alternate reels (e.g., /5B).
How does SMB10J18-E3/52 differ from bi-directional SMB8J18CA?
SMB10J18-E3/52 is unidirectional with anode-cathode polarity and 1000 W peak pulse rating, while SMB8J18CA is bi-directional (no polarity marking) with 800 W rating and symmetric breakdown. The SMB10J18-E3/52 offers higher surge capacity for DC-biased lines like automotive battery rails; SMB8J18CA suits AC-coupled or dual-polarity signal paths. Their VBR and VC values are nearly identical, but conduction behavior differs fundamentally.
What PCB pad layout is recommended for optimal thermal performance of SMB10J18-E3/52?
Vishay specifies mounting SMB10J18-E3/52 on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve the published RθJA = 72 °C/W and full 1000 W pulse rating. Reducing pad size increases thermal resistance and requires derating per Figure 2 in the datasheet. The SMB10J18-E3/52 outline drawing confirms pad-to-pad spacing of 3.30 mm minimum and recommends thermal vias under pads for high-reliability automotive layouts.
SMB10J18-E3/52 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-E3/52 FAQ
1.How can I place an order for SMB10J18-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J18-E3/52 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-E3/52 reliable?
The price and inventory of SMB10J18-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J18-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB10J18-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J18-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J18-E3/52?
SMB10J18-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J18-E3/52 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-E3/52?
For technical support, including SMB10J18-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J18-E3/52 requirements.
6.How does Aetrix verify that SMB10J18-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB10J18-E3/52 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-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB10J18-E3/52?
All SMB10J18-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J18-E3/52, 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-E3/52 part is unused and in its original packaging.
Return procedure for SMB10J18-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J18-E3/52 Tags
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