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Vishay General Semiconductor - Diodes Division SMBJ120CAHE3_A/I
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- Part No.:
- SMBJ120CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ120CAHE3_A/I.pdf
- Description:
- TVS DIODE 120VWM 193VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,884
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Product details
Overview
SMBJ120CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 120 V stand-off voltage (VWM), 133–147 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤193 V at 3.1 A peak surge current.
For engineers reviewing the SMBJ120CAHE3_A/I datasheet, SMBJ120CAHE3_A/I pinout, SMBJ120CAHE3_A/I application, or SMBJ120CAHE3_A/I equivalent, this device is selected for robust overvoltage protection in automotive power rails, industrial sensor interfaces, and telecom DC supply lines where AEC-Q101 qualification, low clamping ratio, and MSL Level 1 solderability are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction enables fast response time (<1 ns), low incremental surge resistance, and stable clamping under repetitive 10/1000 µs transients at 0.01% duty cycle.
The device is rated for TJ = –55 °C to +150 °C operation, features matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets UL 94 V-0 flammability requirements. Its AEC-Q101 qualification (indicated by HE3 suffix) confirms suitability for automotive electronics per stress test standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 120 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 133–147 V at 1 mA - Guaranteed conduction onset range; ensures predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | ≤193 V at IPPM = 3.1 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy absorption capability under standardized 10/1000 µs waveform. |
| ID (Max Reverse Leakage) | 1.0 µA at VWM - Minimal standby current draw; critical for low-power and battery-operated systems. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated placement and reflow. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical two-terminal construction with cathode/anode terminals interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no fixed polarity assignment. |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path across protected line and ground or rail. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - enables use in engine control units and ADAS power supplies. |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients from load dump or inductive switching without degradation - suitable for 12 V/24 V vehicle systems. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during clamping - protects sensitive MOSFET gates and microcontroller I/O pins within safe operating area. |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns - eliminates bake requirements pre-assembly. |
| Glass-passivated junction | Ensures stable leakage and breakdown characteristics over time and temperature - improves long-term field reliability in harsh environments. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs against ISO 7637-2 pulse 1, 2a, and 5a transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power rail and chassis ground. Use Value: Limits voltage to ≤193 V during 3.1 A surge, preventing latch-up or gate oxide damage in downstream PMICs and CAN transceivers. |
Use Scenario: Shielding 4–20 mA analog sensor outputs from ESD and cable discharge events in factory automation. IC Role / Device Role / Timing Role: Low-capacitance TVS shunting transient energy away from precision op-amp inputs and ADC front-ends. Use Value: Sub-µA leakage at 120 V ensures minimal offset error; fast response preserves signal integrity during 8 kV contact ESD. |
| Telecom DC Power Input Protection | Renewable Energy Controller Protection |
|
Use Scenario: Safeguarding PoE-powered equipment input stages from lightning-induced surges on 48 V DC distribution lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp upstream of DC-DC converters and hot-swap controllers. Use Value: 600 W rating absorbs multi-pulse surges per IEC 61000-4-5; AEC-Q101 grade adds confidence in extended outdoor deployment. |
Use Scenario: Guarding solar charge controller MOSFET drivers against voltage spikes from PV array disconnect transients. IC Role / Device Role / Timing Role: Parallel-connected TVS across high-side switch drain-source nodes. Use Value: 150 °C max junction temperature supports operation in unventilated enclosures; bidirectional symmetry simplifies layout in floating-ground systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120CA-M3 | Halogen-free, RoHS-compliant, commercial-grade (non-AEC-Q101); identical VWM, VBR, VC, and PPPM specs. | Lacks automotive qualification; not recommended for under-hood or safety-critical modules. | Select when cost-sensitive industrial or consumer designs require halogen-free compliance without automotive stress validation. |
| SMCJ120CAHE3_A/I | Same electrical specs but in larger SMC (DO-214AB) package; higher thermal mass yields 1000 W PPPM rating and lower RθJA (50 °C/W). | Better suited for high-repetition-rate surges or elevated ambient temperatures (>85 °C) due to superior heat dissipation. | Choose when system-level thermal analysis shows SMBJ120CAHE3_A/I junction temperature exceeds 130 °C under worst-case surge duty. |
Compared with SMBJ120CA-M3, the SMBJ120CAHE3_A/I adds AEC-Q101 assurance for automotive use; compared with SMCJ120CAHE3_A/I, it trades thermal headroom for board space savings in space-constrained layouts.
Availability
SMBJ120CAHE3_A/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ120CAHE3_A/I 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, efficiency, and application-specific performance.
The SMBJ series targets high-reliability transient suppression in automotive, industrial, and telecom infrastructure, delivering optimized clamping performance in compact surface-mount packages with AEC-Q101 and UL recognition.
FAQ
What is the clamping voltage of SMBJ120CAHE3_A/I at its rated peak pulse current?
The SMBJ120CAHE3_A/I clamps to a maximum of 193 V when subjected to its specified peak pulse current of 3.1 A under the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees the upper voltage limit imposed on protected circuits during standardized surge events. The SMBJ120CAHE3_A/I maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is SMBJ120CAHE3_A/I suitable for automotive applications?
Yes, SMBJ120CAHE3_A/I is AEC-Q101 qualified, as confirmed by the "HE3" suffix and Vishay documentation. It undergoes rigorous stress testing including temperature cycling, highly accelerated life testing (HALT), and ESD verification, making it appropriate for engine control units, body electronics, and ADAS power domains. The SMBJ120CAHE3_A/I also meets UL 497B recognition for protector classification, supporting functional safety requirements in automotive systems.
How does the bidirectional configuration of SMBJ120CAHE3_A/I affect circuit design?
The SMBJ120CAHE3_A/I has no polarity marking and functions identically in both directions, enabling direct placement across any two points needing symmetrical overvoltage protection - such as differential signal pairs or floating power rails. Unlike unidirectional TVS diodes, it eliminates orientation errors during assembly and avoids the need for dual-device solutions in AC-coupled or bipolar supply paths. This simplifies schematic capture and PCB layout for the SMBJ120CAHE3_A/I.
What is the maximum reverse leakage current for SMBJ120CAHE3_A/I at its stand-off voltage?
At its 120 V stand-off voltage (VWM), the SMBJ120CAHE3_A/I exhibits a maximum reverse leakage current of 1.0 µA at 25 °C, per Vishay's Electrical Characteristics table. This ultra-low leakage ensures minimal power loss in always-on systems and prevents measurement drift in high-impedance sensor interfaces. The SMBJ120CAHE3_A/I maintains leakage below 5 µA up to +125 °C, supporting precision analog applications.
Does SMBJ120CAHE3_A/I require special handling or baking prior to reflow soldering?
No, SMBJ120CAHE3_A/I is rated MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. It may be placed directly onto PCBs and processed through standard lead-free reflow profiles without preconditioning, baking, or dry-pack requirements. The SMBJ120CAHE3_A/I's molding compound meets UL 94 V-0, and its matte tin-plated leads comply with J-STD-002 for solderability - ensuring robust first-pass yield.
SMBJ120CAHE3_A/I 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 120V
- Voltage - Breakdown (Min):
- 133V
- Voltage - Clamping (Max) @ Ipp:
- 193V
- Current - Peak Pulse (10/1000µs):
- 3.1A
- Power - Peak Pulse:
- 600W
- 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 (SMBJ)
SMBJ120CAHE3_A/I FAQ
1.How can I place an order for SMBJ120CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ120CAHE3_A/I 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 SMBJ120CAHE3_A/I reliable?
The price and inventory of SMBJ120CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ120CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ120CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ120CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ120CAHE3_A/I?
SMBJ120CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ120CAHE3_A/I 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 SMBJ120CAHE3_A/I?
For technical support, including SMBJ120CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ120CAHE3_A/I requirements.
6.How does Aetrix verify that SMBJ120CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ120CAHE3_A/I 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 SMBJ120CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ120CAHE3_A/I?
All SMBJ120CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ120CAHE3_A/I, 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 SMBJ120CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMBJ120CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ120CAHE3_A/I Tags
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