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Vishay General Semiconductor - Diodes Division SMBJ120CAHE3_B/H
- Part No.:
- SMBJ120CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ120CAHE3_B/H.pdf
- Description:
- 600W,120V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,970
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Product details
Overview
SMBJ120CAHE3_B/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 120 V standoff voltage (VWM), 133–147 V breakdown range (VBR at 1 mA), 193 A peak pulse current (IPPM) under 10/1000 µs waveform, and clamps to ≤328 V at rated surge. It is AEC-Q101 qualified and used to protect MOSFETs, ICs, and sensor signal lines in industrial and automotive power systems.
For engineers reviewing the SMBJ120CAHE3_B/H datasheet, SMBJ120CAHE3_B/H pinout, SMBJ120CAHE3_B/H application, or SMBJ120CAHE3_B/H equivalent, key selection criteria include bidirectional clamping capability, 600 W peak pulse power rating, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This TVS diode operates as a voltage-clamping device across signal or power rails, responding within picoseconds to transients induced by inductive switching or ESD events. Its bidirectional architecture enables symmetrical clamping in both polarities without polarity sensitivity, making it suitable for AC-coupled or floating interfaces.
The device uses a glass-passivated silicon junction and is rated for 150 °C maximum junction temperature. It meets MSL Level 1 per J-STD-020, supports 260 °C lead-free reflow, and delivers stable performance under repetitive 0.01% duty-cycle surges - critical for automotive and industrial environments where transient immunity must be sustained over product lifetime.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 133 V / 147 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| IPPM | 193 A (10/1000 µs) - Peak surge current handling capacity; determines protection level against high-energy transients. |
| VC | ≤328 V - Clamped voltage at IPPM; directly limits stress on downstream components during surge. |
| PPPM | 600 W - Peak pulse power dissipation; validates energy absorption capability for standardized surge waveforms. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and high-ambient industrial settings. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient; informs PCB copper pad design requirements for thermal management. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking for bidirectional types.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | Bidirectional terminal pair | Identical terminals with no functional polarity; either side may connect to protected line or ground reference. |
| Anode (Cathode) | Bidirectional terminal pair | Electrically symmetric to first terminal; enables clamping regardless of transient polarity direction. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables reliable suppression of high-energy transients (e.g., ISO 7637-2 Pulse 5a) without degradation in automotive ECUs. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test conditions. |
| MSL Level 1 | Allows unlimited floor life and compatibility with standard lead-free reflow profiles up to 260 °C peak. |
| Glass passivated junction | Provides stable leakage performance (<1 µA at VWM) and long-term reliability under humidity and thermal stress. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients, improving protection margin for 3.3 V/5 V logic interfaces. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting 12 V battery-fed control modules from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed between power rail and chassis ground to shunt surge energy away from MCU and driver ICs. Use Value: Limits transient voltage to ≤328 V, preserving integrity of 36 V-rated input stages in power management ICs. | Use Scenario: Shielding analog outputs of pressure/temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional clamping element across differential or single-ended sensor output pins. Use Value: Maintains signal fidelity by clamping sub-100 ns ESD pulses to <330 V while adding <1 pF parasitic capacitance. |
| Telecom DC Power Feeds | Consumer Appliance Motor Drivers |
Use Scenario: Safeguarding PoE-powered equipment inputs against lightning-induced surges on 48 V DC lines. IC Role / Device Role / Timing Role: Primary overvoltage clamp at DC input stage upstream of DC/DC converters and interface ICs. Use Value: Absorbs 600 W surge energy without failure, meeting IEC 61000-4-5 Level 4 requirements for telecom infrastructure. | Use Scenario: Protecting gate drivers and half-bridge MOSFETs from inductive kickback during BLDC motor commutation. IC Role / Device Role / Timing Role: Snubber-style TVS across motor phase outputs or supply rails to limit dv/dt stress. Use Value: Clamps 193 A surge currents to safe levels, preventing avalanche failure in 600 V MOSFETs during rapid switching. |
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-E3/52 | Same electrical specs and SMB package; RoHS-compliant commercial grade without AEC-Q101 qualification. | Lacks automotive qualification; not suitable for under-hood or safety-critical vehicle subsystems. | Select when cost-sensitive industrial or consumer designs do not require automotive reliability validation. |
| SMCJ120CAHE3_A/H | Same VWM/VC ratings but in larger SMC (DO-214AB) package; higher IPPM (328 A) and PPPM (1500 W). | Offers greater surge margin but requires larger PCB footprint and different thermal layout. | Choose when system-level surge testing exceeds 600 W or when board space allows larger package for enhanced ruggedness. |
Compared with SMBJ120CAHE3_B/H, the E3/52 variant trades automotive qualification for lower cost in non-automotive use, while the SMCJ120CAHE3_A/H provides higher surge capacity at the expense of footprint and thermal design flexibility.
Availability
SMBJ120CAHE3_B/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and appliance motor controllers requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMBJ120CAHE3_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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMBJ series targets high-reliability transient suppression in space-constrained SMT applications, with design focus on automotive, industrial, and telecom systems demanding robust ESD and surge immunity.
FAQ
What is the clamping voltage of SMBJ120CAHE3_B/H at its rated peak pulse current?
The SMBJ120CAHE3_B/H clamps to a maximum of 328 V when subjected to its rated 193 A peak pulse current (10/1000 µs waveform). This value is specified in the Electrical Characteristics table and represents the upper limit of voltage seen by protected circuitry during worst-case surge events, ensuring downstream components remain within safe operating limits.
Is SMBJ120CAHE3_B/H suitable for automotive applications?
Yes, SMBJ120CAHE3_B/H is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD verification - making it appropriate for engine control units, body electronics, and ADAS modules where automotive-grade reliability is mandatory.
How does the bidirectional configuration of SMBJ120CAHE3_B/H affect its circuit implementation?
The bidirectional configuration of SMBJ120CAHE3_B/H eliminates polarity concerns during placement: either terminal may connect to the protected line and the other to ground or reference. This simplifies layout for AC-coupled interfaces, differential buses, or floating sensor outputs, and ensures symmetrical clamping behavior regardless of transient polarity - unlike unidirectional variants that require correct cathode orientation.
What is the thermal resistance and how does it impact PCB layout for SMBJ120CAHE3_B/H?
SMBJ120CAHE3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W. To maintain safe junction temperatures under repeated surges, the PCB must provide adequate copper area - Vishay recommends 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. Insufficient copper will cause excessive temperature rise and potential parametric shift or failure.
Does SMBJ120CAHE3_B/H meet moisture sensitivity level requirements for lead-free assembly?
Yes, SMBJ120CAHE3_B/H meets MSL Level 1 per J-STD-020, meaning it has unlimited floor life and can withstand peak reflow temperatures up to 260 °C without preconditioning. This eliminates bake requirements and supports direct placement into standard lead-free SMT processes, reducing manufacturing complexity and cost.
SMBJ120CAHE3_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:
- -
- 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:
- 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)
SMBJ120CAHE3_B/H FAQ
1.How can I place an order for SMBJ120CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ120CAHE3_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 SMBJ120CAHE3_B/H reliable?
The price and inventory of SMBJ120CAHE3_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 SMBJ120CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ120CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ120CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ120CAHE3_B/H?
SMBJ120CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ120CAHE3_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 SMBJ120CAHE3_B/H?
For technical support, including SMBJ120CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ120CAHE3_B/H requirements.
6.How does Aetrix verify that SMBJ120CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ120CAHE3_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 SMBJ120CAHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ120CAHE3_B/H?
All SMBJ120CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ120CAHE3_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 SMBJ120CAHE3_B/H part is unused and in its original packaging.
Return procedure for SMBJ120CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ120CAHE3_B/H Tags
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