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Vishay General Semiconductor - Diodes Division SMB10J18HE3/52
- Part No.:
- SMB10J18HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J18HE3/52.pdf
- Description:
- TVS DIODE 18VWM 32.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,284
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Product details
Overview
SMB10J18HE3/52 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), 29.2 V clamping voltage (VC) at 34.2 A peak pulse current (IPPM), and 1000 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive power electronics and industrial sensor interfaces.
For engineers reviewing the SMB10J18HE3/52 datasheet, SMB10J18HE3/52 pinout, SMB10J18HE3/52 application, or SMB10J18HE3/52 equivalent, key selection criteria include clamping performance under 1000 W surges, AEC-Q101 qualification for automotive use, RoHS-compliant HE3 whisker-tested terminals, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a unidirectional clamping device, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its thermal design targets ≤150 °C junction temperature, supported by RθJA = 72 °C/W and RθJL = 20 °C/W ratings, enabling reliable operation under repetitive transients when mounted per recommended pad layout.
The SMB10J18HE3/52 is rated for 100 A non-repetitive forward surge current (IFSM) and exhibits ≤1.0 µA reverse leakage at 18 V (VWM), meeting ANSI/IEEE C62.35 standards for surge suppression. Its AEC-Q101 qualification confirms suitability for automotive powertrain and body electronics where robustness against load-dump and inductive switching events is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 18 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 20.0–22.1 V at 1.0 mA - Confirmed voltage range where device enters avalanche conduction; ensures predictable turn-on during transients. |
| VC (Clamping Voltage) | 29.2 V at 34.2 A IPPM - Peak voltage seen by protected circuit during 1000 W surge; critical for IC/MOSFET overvoltage margin. |
| PPPM (Peak Pulse Power) | 1000 W (10/1000 µs) - Energy-handling capacity for standardized surge waveforms; validates protection level per ISO 7637-2. |
| ID (Reverse Leakage) | ≤1.0 µA at 18 V - Minimal standby power loss and signal integrity impact in high-impedance circuits. |
| TJ max. | 150 °C - Maximum junction temperature rating; supports operation in under-hood automotive environments. |
| Qualification | AEC-Q101 qualified - Validated reliability for automotive applications including temperature cycling, humidity, and mechanical shock. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-side reference; completes clamping loop during positive transients. |
| Cathode | Avalanche conduction terminal / Protected line interface | Connected to line being protected (e.g., 12 V rail); conducts surge current to anode when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Uni-directional clamping architecture | Enables precise polarity-aligned protection on DC power rails without bidirectional leakage penalties. |
| Glass passivated chip junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without popcorn effect or delamination; compatible with standard SMT assembly. |
| HE3 suffix whisker testing | Meets JESD 201 Class 2 for tin whisker resistance - critical for automotive long-life deployments. |
| Low profile DO-214AA footprint | 0.220" × 0.155" outline enables high-density PCB layouts while maintaining 1000 W surge capability. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Guarding |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients (ISO 7637-2 Pulse 5a) and alternator overshoot. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and ground to clamp surges above 29.2 V within nanoseconds. Use Value: Prevents damage to downstream PMICs and microcontrollers by limiting peak voltage to 29.2 V at 34.2 A, preserving system uptime. |
Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 µA) TVS connected across signal and ground to suppress ESD and switching noise without loading the sensor. Use Value: Maintains signal fidelity with <1 µA leakage at 18 V while clamping 8 kV HBM ESD events to safe levels. |
| DC Motor Drive Gate Protection | Telecom Power Interface Surge Suppression |
|
Use Scenario: Safeguarding MOSFET gate drivers in brushed DC motor controllers subjected to inductive kickback. IC Role / Device Role / Timing Role: Fast-response TVS placed between gate and source to clamp negative-going spikes before driver IC damage occurs. Use Value: Sub-ns response prevents gate oxide rupture; 29.2 V clamping protects drivers rated for ≤30 V absolute maximum. |
Use Scenario: Front-end protection of 48 V PoE-powered telecom equipment against lightning-induced surges on power inputs. IC Role / Device Role / Timing Role: Primary surge limiter in series with DC-DC converter input, absorbing up to 1000 W per IEC 61000-4-5. Use Value: Enables compliance with EN 61000-4-5 Level 4 (4 kV) via verified 29.2 V clamping at full 1000 W rating. |
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 and 18 V VWM, but not AEC-Q101 qualified; lower surge rating (600 W vs. 1000 W). | Restricted to commercial-grade industrial or consumer applications lacking automotive qualification requirements. | Select only if AEC-Q101 and 1000 W PPPM are not required; verify thermal derating for repeated surges. |
| 1.5SMC18A | Higher package thermal resistance (RθJA ≈ 110 °C/W), larger DO-214AB (SMC) footprint, same 18 V VWM and 29.2 V VC. | Requires more PCB area and offers reduced power density; suitable where board space permits and higher mounting pad thermal mass is available. | Prefer when legacy SMC footprint compatibility is needed; avoid in space-constrained automotive modules. |
Compared with SMBJ18A-E3/52 and 1.5SMC18A, SMB10J18HE3/52 delivers superior power density (1000 W in SMB), automotive-grade reliability (AEC-Q101 + HE3 whisker test), and optimized thermal performance (RθJA = 72 °C/W) - making it the preferred choice for next-gen automotive and high-reliability industrial designs.
Availability
SMB10J18HE3/52 is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power supply protection requiring stable component supply, AEC-Q101 validation, and consistent 1000 W surge handling.
Supply support for SMB10J18HE3/52 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, rectifiers, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMB10Jxx series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density transient suppression in harsh-environment applications including automotive, industrial automation, and telecommunications infrastructure.
FAQ
What is the clamping voltage of SMB10J18HE3/52 at its rated peak pulse current?
The SMB10J18HE3/52 has a maximum clamping voltage (VC) of 29.2 V at 34.2 A peak pulse current (IPPM), measured using the standard 10/1000 µs waveform. This value is confirmed in the Vishay datasheet (Document Number: 88422, page 2) and defines the upper voltage limit imposed on protected circuits during surge events. The SMB10J18HE3/52 maintains this clamping performance across its operational temperature range and is validated for AEC-Q101 compliance.
Is SMB10J18HE3/52 qualified for automotive applications?
Yes, SMB10J18HE3/52 carries the HE3 suffix, indicating AEC-Q101 qualification per Vishay's documentation. It undergoes stress testing for temperature cycling, humidity, mechanical shock, and tin whisker resistance (JESD 201 Class 2). This makes SMB10J18HE3/52 suitable for under-hood and chassis-mounted automotive systems where reliability under thermal and vibration stress is mandatory.
What does the 'HE3' suffix mean in SMB10J18HE3/52?
The 'HE3' suffix in SMB10J18HE3/52 denotes two key attributes: 'H' indicates AEC-Q101 qualification, and 'E3' specifies RoHS-compliant, matte tin-plated leads that meet JESD 201 Class 2 whisker testing. This distinguishes it from commercial-grade 'E3/52' variants and confirms suitability for long-life automotive deployments where tin whisker growth could cause latent field failures.
How does SMB10J18HE3/52 differ from SMBJ18A in surge handling capability?
SMB10J18HE3/52 delivers 1000 W peak pulse power (PPPM) with a 10/1000 µs waveform, whereas SMBJ18A is rated for 600 W under identical conditions. This 67% higher energy absorption stems from optimized chip geometry and thermal design in the SMB10J series. The SMB10J18HE3/52 also features lower thermal resistance (RθJA = 72 °C/W vs. ~90 °C/W for SMBJ), enabling better sustained surge performance.
What is the recommended PCB pad layout for SMB10J18HE3/52 to achieve full 1000 W rating?
To achieve the full 1000 W peak pulse power rating, Vishay specifies mounting SMB10J18HE3/52 on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Figure 2 in Document Number 88422. Smaller pads result in thermal derating - e.g., at 75 °C initial junction temperature, power capability drops to ~75% of rated value. The SMB10J18HE3/52 datasheet provides exact derating curves for elevated ambient conditions.
SMB10J18HE3/52 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J18HE3/52 FAQ
1.How can I place an order for SMB10J18HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J18HE3/52 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 SMB10J18HE3/52 reliable?
The price and inventory of SMB10J18HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J18HE3/52 is usually 5 days.
3.What payment methods are accepted for SMB10J18HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J18HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J18HE3/52?
SMB10J18HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J18HE3/52 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 SMB10J18HE3/52?
For technical support, including SMB10J18HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J18HE3/52 requirements.
6.How does Aetrix verify that SMB10J18HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB10J18HE3/52 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 SMB10J18HE3/52 meets industry standards.
7.What is the process for return or replacement of SMB10J18HE3/52?
All SMB10J18HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J18HE3/52, 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 SMB10J18HE3/52 part is unused and in its original packaging.
Return procedure for SMB10J18HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J18HE3/52 Tags
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