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Vishay General Semiconductor - Diodes Division SMBG120CA-E3/5B
- Part No.:
- SMBG120CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG120CA-E3/5B.pdf
- Description:
- TVS DIODE 120VWM 193VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,529
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Product details
Overview
SMBG120CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, rated for 120 V standoff voltage (VWM), 133–147 V breakdown voltage (VBR), 600 W peak pulse power (10/1000 μs), and AEC-Q101 qualified for automotive electronics protection against inductive switching transients and ESD on signal lines.
For engineers reviewing the SMBG120CA-E3/5B datasheet, SMBG120CA-E3/5B pinout, SMBG120CA-E3/5B application, or SMBG120CA-E3/5B equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal resistance (RθJA = 100 °C/W), junction temperature range (−55 to +150 °C), and AEC-Q101 qualification status - all critical for automotive-grade surge protection design.
Technical Context
The SMBG120CA-E3/5B operates as a bidirectional voltage-clamping device with symmetrical avalanche breakdown in both polarities, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low leakage (<1.0 μA at VWM = 120 V).
Designed for high-energy transient suppression, it delivers 193 A peak pulse current (IPPM) at 10/1000 μs waveform while clamping to ≤193 V (VC), with fast response time (<1.0 ns) and low incremental surge resistance - key for safeguarding sensitive analog front-ends and CAN/LIN bus interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 133 V / 147 V at IT = 1 mA - defines reliable avalanche onset window under standardized test conditions |
| VC @ IPPM | ≤193 V at 193 A - clamped voltage during 600 W transient, directly limiting stress on downstream ICs |
| PPPM | 600 W (10/1000 μs) - peak surge power handling capacity per single event, derated above 25 °C |
| IPPM | 193 A - maximum non-repetitive surge current the device safely conducts without failure |
| TJ range | −55 °C to +150 °C - enables operation in under-hood automotive environments and industrial enclosures |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, gull-wing leads, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102; no polarity marking for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional current path | Either terminal serves as anode or cathode depending on transient polarity - no orientation required during placement |
| Case (body) | Non-electrical mechanical interface | Thermally conductive plastic molding (UL 94 V-0) with 0.2" × 0.2" copper pad recommendation for optimal heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Enables robust protection against ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 surges in automotive ECUs |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control, ADAS sensors, and body electronics |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage stress on protected circuitry compared to higher-ratio TVS devices |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage performance across temperature and lifetime |
Applications
| Automotive Sensor Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine bay modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between sensor output and microcontroller ADC input. Use Value: Limits transient voltage to ≤193 V during 12 V system load dump events, preserving ADC integrity and preventing latch-up. | Use Scenario: Safeguarding CAN_H/CAN_L differential pair in vehicle infotainment gateways subjected to ESD and coupled noise. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed across differential bus lines near connector entry point. Use Value: Clamps common-mode surges without distorting 1 Mbps CAN signaling due to symmetric breakdown and sub-1 ns response. |
| Industrial PLC I/O Protection | Telecom Line Interface Protection |
Use Scenario: Shielding 24 V DC digital input channels in programmable logic controllers from field-wiring induced transients. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between input line and ground, upstream of optocoupler input stage. Use Value: Withstands repeated 600 W surges while maintaining <1.0 μA leakage at 120 V, ensuring stable logic threshold detection. | Use Scenario: Protecting RS-485 transceivers in base station remote radio units from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional clamping device placed across differential data lines prior to transceiver ESD diodes. Use Value: Absorbs up to 193 A surge current while holding clamped voltage below transceiver absolute maximum rating (±25 V). |
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-E3/5B | Same VWM (120 V), lower PPPM (600 W → 400 W), smaller SMB (DO-214AA) package | Limited to lower-energy transients; not AEC-Q101 qualified | Select when cost or board space is prioritized over automotive qualification and peak surge margin |
| SMCJ120CA-E3/5B | Same VWM, higher PPPM (1500 W), larger SMC (DO-214AB) package | Requires larger PCB footprint; suited for industrial mains-level surge events | Select when system-level surge immunity exceeds ISO 7637-2 Level IV and layout allows SMC footprint |
Compared with SMBJ120CA-E3/5B and SMCJ120CA-E3/5B, the SMBG120CA-E3/5B uniquely balances 600 W surge capability, AEC-Q101 qualification, and SMBG footprint - making it the preferred choice for space-constrained automotive modules requiring certified reliability.
Availability
SMBG120CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, CAN bus nodes, industrial PLC I/O modules, and telecom line drivers requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMBG120CA-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 high-reliability, automotive-qualified components.
The SMBG series was developed specifically for surface-mount transient suppression in harsh environments, targeting AEC-Q101 compliance, high surge robustness, and compatibility with automated SMT assembly processes.
FAQ
What is the clamping voltage of SMBG120CA-E3/5B at its rated peak pulse current?
The SMBG120CA-E3/5B has a maximum clamping voltage (VC) of 193 V when subjected to its rated peak pulse current (IPPM) of 193 A under the 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees that protected circuitry sees no more than 193 V during worst-case transient events - a critical parameter for ensuring downstream IC survival in automotive and industrial systems using SMBG120CA-E3/5B.
Is SMBG120CA-E3/5B suitable for automotive applications?
Yes, SMBG120CA-E3/5B is AEC-Q101 qualified, meaning it has passed rigorous stress tests including temperature cycling, high-temperature reverse bias, and ESD robustness required for automotive electronics. Its −55 °C to +150 °C operating range, MSL Level 1 reflow compatibility, and bidirectional clamping make SMBG120CA-E3/5B appropriate for engine control units, ADAS sensors, and body control modules where reliability under thermal and electrical stress is mandatory.
How does the SMBG120CA-E3/5B differ from unidirectional variants like SMBG120A-E3/5B?
The SMBG120CA-E3/5B is bidirectional, providing symmetrical clamping for both positive and negative transients, whereas SMBG120A-E3/5B is unidirectional and only protects against reverse-polarity surges. The "CA" suffix explicitly denotes bidirectional functionality, with identical VWM (120 V) and VBR (133–147 V) but no cathode band marking. This makes SMBG120CA-E3/5B ideal for AC-coupled or differential signal paths where polarity cannot be assumed - a key distinction confirmed in Vishay's official SMBG family documentation.
What is the thermal resistance of SMBG120CA-E3/5B, and how does it affect layout?
SMBG120CA-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value guides PCB layout: insufficient copper area increases junction temperature during repetitive surges, risking thermal runaway. To maintain reliability, designers must adhere to the recommended pad dimensions and avoid excessive trace length or isolation - a requirement explicitly defined in the SMBG120CA-E3/5B datasheet and critical for sustained operation in SMBG120CA-E3/5B deployments.
Does SMBG120CA-E3/5B have a polarity marking on the package?
No, SMBG120CA-E3/5B has no polarity marking because it is a bidirectional device - either terminal functions identically regardless of voltage polarity. Unlike unidirectional SMBG variants (e.g., SMBG120A-E3/5B) that feature a cathode band, the SMBG120CA-E3/5B body is unmarked, simplifying automated placement and eliminating orientation errors during assembly. This design trait is specified in Vishay's mechanical drawings and ordering information for all "CA"-suffixed SMBG devices, including SMBG120CA-E3/5B.
SMBG120CA-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG120CA-E3/5B FAQ
1.How can I place an order for SMBG120CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG120CA-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 SMBG120CA-E3/5B reliable?
The price and inventory of SMBG120CA-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 SMBG120CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG120CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG120CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG120CA-E3/5B?
SMBG120CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG120CA-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 SMBG120CA-E3/5B?
For technical support, including SMBG120CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG120CA-E3/5B requirements.
6.How does Aetrix verify that SMBG120CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG120CA-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 SMBG120CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG120CA-E3/5B?
All SMBG120CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG120CA-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 SMBG120CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBG120CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG120CA-E3/5B Tags
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