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Vishay General Semiconductor - Diodes Division SMBG120CA-E3/52
- Part No.:
- SMBG120CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG120CA-E3/52.pdf
- Description:
- TVS DIODE 120VWM 193VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,554
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Product details
Overview
SMBG120CA-E3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping voltage transients on signal and power lines. It features 120 V stand-off voltage (VWM), 133–147 V breakdown voltage (VBR) at 1 mA, 193 A peak pulse current (IPPM) with 10/1000 µs waveform, 600 W peak pulse power (PPPM), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG120CA-E3/52 datasheet, SMBG120CA-E3/52 pinout, SMBG120CA-E3/52 application, or SMBG120CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, low clamping voltage (VC = 193 V at IPPM), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on industrial and automotive PCBs.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports effective energy diversion during ESD or lightning-induced surges.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 100 °C/W (on 5.0 mm × 5.0 mm copper pads) and RθJL = 20 °C/W, making it suitable for thermally constrained layouts in engine control units and power supply rails.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 12 V–48 V systems. |
| VBR (min/max) | 133 V / 147 V at IT = 1 mA - Confirmed breakdown range ensures predictable turn-on under surge conditions. |
| VC @ IPPM | 193 V at 193 A (10/1000 µs) - Clamping voltage limits downstream IC stress during worst-case transients. |
| PPPM | 600 W - Peak pulse power handling capacity per single transient event, validated per ANSI/IEEE C62.35. |
| IPPM | 193 A - Surge current rating directly determines protection level against ISO 7637-2 Pulse 1/2/5a/b and IEC 61000-4-5 surges. |
| TJ max. | +150 °C - Enables use in under-hood automotive environments and high-temperature industrial enclosures. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronics, including temperature cycling and HTRB. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A | Bidirectional conduction path - no polarity marking; symmetrical operation enables AC line or differential pair protection. |
| Cathode | Terminal K | Bidirectional conduction path - electrically identical to Anode; device functions identically regardless of orientation. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables robust protection against ISO 7637-2 and IEC 61000-4-5 surge events without derating in standard PCB layouts. |
| AEC-Q101 qualified | Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without preconditioning; eliminates moisture-related popcorning risk during assembly. |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage (<1.0 µA) across temperature and lifetime. |
| Low profile SMBG package | 0.235" × 0.130" footprint (5.97 mm × 3.30 mm) saves board space versus SMA/SMB alternatives while maintaining thermal performance. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Bidirectional clamping element placed at power entry point to limit voltage seen by downstream DC/DC converters and microcontrollers. Use Value: Withstands 193 A surge current and clamps to ≤193 V, preventing damage to 36 V-rated input stages in automotive MCUs. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation PLCs from ESD and switching noise. IC Role / Device Role / Timing Role: Low-capacitance TVS placed adjacent to connector pins to shunt fast transients before reaching precision ADC front-ends. Use Value: Sub-1.0 µA leakage at 120 V ensures minimal signal offset drift in high-impedance sensor circuits over temperature. |
| Telecom Data Line Protection | Consumer Device USB Port Protection |
Use Scenario: Safeguarding RS-485 transceivers in base station backhaul links exposed to induced lightning surges. IC Role / Device Role / Timing Role: Bidirectional TVS on differential pair (A/B lines) to clamp common-mode and differential-mode transients simultaneously. Use Value: Symmetrical VBR (133–147 V) and matched clamping ensure balanced protection without skewing differential signaling integrity. | Use Scenario: Adding secondary surge immunity to USB 2.0 VBUS and D+/D− lines in smart home hubs subjected to user-handling ESD. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after primary fuse to absorb residual energy that passes through primary protection. Use Value: 120 V VWM allows coexistence with 5 V rail while providing >2× margin above VBUS max, avoiding false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120CA-E3/52 | Same VWM/VBR/VC, but lower PPPM = 600 W (same rating), higher IPPM = 200 A; SMBJ package has larger thermal pad (6.2 mm × 3.6 mm). | SMBJ offers marginally better thermal dissipation in high-duty-cycle surge environments; less space-constrained than SMBG. | Select SMBJ120CA-E3/52 when board layout permits larger footprint and enhanced thermal margin is required. |
| SMCJ120CA-E3/52 | Same electrical specs, but SMC (DO-214AB) package: 7.1 mm × 6.2 mm, RθJA = 40 °C/W (vs. 100 °C/W for SMBG), higher IFSM = 200 A. | Superior surge endurance in repetitive surge scenarios (e.g., motor drive feedback lines); not AEC-Q101 qualified. | Choose SMCJ120CA-E3/52 for industrial motor controls where AEC-Q101 is unnecessary and thermal performance is critical. |
Compared with SMBJ120CA-E3/52 and SMCJ120CA-E3/52, SMBG120CA-E3/52 delivers identical clamping performance in the smallest footprint and is the only AEC-Q101-qualified option among the three-making it the preferred choice for space-limited automotive modules requiring certified reliability.
Availability
SMBG120CA-E3/52 is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface, telecom data line, and consumer USB port protection requiring stable component supply and full traceability.
Supply support for SMBG120CA-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBG TransZORB® series is engineered for high-energy transient suppression in automotive, industrial, and telecom systems where compact size, AEC-Q101 compliance, and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of SMBG120CA-E3/52 at its rated peak pulse current?
The SMBG120CA-E3/52 has a maximum clamping voltage (VC) of 193 V when subjected to its rated 193 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for downstream circuitry. The SMBG120CA-E3/52 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBG120CA-E3/52 suitable for automotive applications?
Yes, SMBG120CA-E3/52 is AEC-Q101 qualified and specifically designed for automotive use cases including engine control units, body electronics, and ADAS sensor interfaces. Its glass-passivated junction, MSL Level 1 rating, and guaranteed performance from -55 °C to +150 °C meet stringent automotive reliability requirements. The SMBG120CA-E3/52 is referenced in Vishay's automotive-grade TransZORB® portfolio documentation.
How does the bidirectional configuration of SMBG120CA-E3/52 affect its circuit implementation?
The SMBG120CA-E3/52 has no polarity marking and operates identically in both directions, allowing direct placement across AC-coupled lines, differential pairs (e.g., RS-485), or ungrounded power rails without orientation concerns. This eliminates routing constraints and reduces BOM complexity versus unidirectional TVS diodes. The SMBG120CA-E3/52 achieves symmetrical VBR (133–147 V) and matched clamping in both polarities per datasheet testing.
What is the maximum reverse leakage current of SMBG120CA-E3/52 at its stand-off voltage?
At its 120 V stand-off voltage (VWM) and TA = 25 °C, the SMBG120CA-E3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA. This low leakage ensures minimal power loss and signal integrity impact in high-impedance circuits such as sensor bias networks or precision reference paths. The SMBG120CA-E3/52 maintains leakage below 5.0 µA up to +125 °C per thermal derating curves.
Does SMBG120CA-E3/52 require special PCB layout considerations for thermal performance?
Yes - to achieve the specified 100 °C/W junction-to-ambient thermal resistance (RθJA), the SMBG120CA-E3/52 must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Vishay's recommended pad layout. Reducing pad size increases thermal impedance and may cause premature failure under repeated surge events. The SMBG120CA-E3/52 datasheet provides exact dimensional drawings for optimal thermal and mechanical reliability.
SMBG120CA-E3/52 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-E3/52 FAQ
1.How can I place an order for SMBG120CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG120CA-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 SMBG120CA-E3/52 reliable?
The price and inventory of SMBG120CA-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 SMBG120CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG120CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG120CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG120CA-E3/52?
SMBG120CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG120CA-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 SMBG120CA-E3/52?
For technical support, including SMBG120CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG120CA-E3/52 requirements.
6.How does Aetrix verify that SMBG120CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG120CA-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 SMBG120CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG120CA-E3/52?
All SMBG120CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG120CA-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 SMBG120CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBG120CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG120CA-E3/52 Tags
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