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Vishay General Semiconductor - Diodes Division SMBG12CA-M3/5B
- Part No.:
- SMBG12CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG12CA-M3/5B.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO215AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBG12CA-M3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 12 V stand-off voltage (VWM), 13.3–14.7 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), clamping voltage of 19.9 V at 30.2 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG12CA-M3/5B datasheet, SMBG12CA-M3/5B pinout, SMBG12CA-M3/5B application, or SMBG12CA-M3/5B equivalent, key selection criteria include bidirectional surge suppression capability, low clamping ratio (VC/VBR ≈ 1.43), MSL Level 1 moisture sensitivity, halogen-free RoHS compliance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR, IPPM, and VC specifications for positive and negative transients. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), while the low incremental surge resistance enables 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 0.2" × 0.2" pads) and RθJL = 20 °C/W. It meets UL 497B recognition (QVGQ2) and complies with ANSI/IEEE C62.35 for surge protector classification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - Ensures consistent turn-on threshold across production lots; guarantees clamping activation within tight tolerance. |
| VC @ IPPM | 19.9 V at 30.2 A - Peak clamped voltage during 600 W transient; limits downstream IC stress to safe levels. |
| PPPM | 600 W (10/1000 µs) - Sustains high-energy surges without failure; supports repetitive 0.01% duty cycle operation. |
| ID @ VWM | <1.0 µA - Negligible leakage current preserves signal integrity and battery life in always-on circuits. |
| TJ max | +150 °C - Enables use in under-hood automotive environments and industrial enclosures with elevated ambient temperatures. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile gull-wing leaded case with matte tin-plated terminals compliant with J-STD-002 and JESD 22-B102. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | Accepts reverse surge current during negative transients; symmetrical with cathode for bidirectional operation. |
| Cathode | Transient current entry (positive polarity) | Accepts forward surge current during positive transients; functionally identical to anode in bidirectional configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| AEC-Q101 qualification | Validates reliability for automotive powertrain, body control, and ADAS modules subject to harsh thermal and vibration stress. |
| Halogen-free & RoHS compliant (M3 suffix) | Meets global environmental regulations and eliminates corrosive halogen emissions during PCB reflow or end-of-life incineration. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profiles up to 260 °C peak, eliminating bake-out requirements. |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV line-earth) with margin when mounted per recommended pad layout. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine control units from load-dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector interface to clamp ±200 V transients before reaching ADC front-end or signal conditioner. Use Value: Prevents sensor offset drift and latch-up by limiting voltage excursion to ≤19.9 V, preserving measurement accuracy and system uptime. | Use Scenario: Safeguarding CANH/CANL differential pair in vehicle infotainment gateways against ESD and bus faults. IC Role / Device Role / Timing Role: Two SMBG12CA-M3/5B devices deployed in back-to-back configuration across CANH-GND and CANL-GND to absorb common-mode surges. Use Value: Maintains CAN signal integrity during ISO 10605 ESD events (±8 kV contact) without disrupting bit timing or causing node reset. |
| Telecom Line Card Surge Suppression | Consumer USB Port ESD Protection |
Use Scenario: Shielding Ethernet PHY interfaces on telecom base station line cards from lightning-induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: Placed between transformer center-taps and PHY ICs to shunt common-mode energy while preserving 100 Ω impedance matching. Use Value: Achieves IEC 61000-4-5 compliance (2 kV line-earth) with <100 ns response, preventing PHY latch-up and packet loss. | Use Scenario: Hardening USB 2.0 data lines (D+/D−) in smart home hubs against human-body-model ESD events during plug/unplug cycles. IC Role / Device Role / Timing Role: Bidirectional TVS connected between D+ and D− to suppress differential-mode ESD without loading the 90 Ω differential impedance. Use Value: Clamps ±15 kV HBM transients to <12 V peak, avoiding USB enumeration failure and port disablement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ12CA-M3/5B | Same VWM/VBR/VC, but lower PPPM = 600 W (same rating) and higher IPPM = 32.5 A; identical SMB (DO-214AA) package footprint but 0.095" wider body. | SMBJ series uses DO-214AA (SMB) instead of DO-215AA (SMBG); requires PCB land pattern revision due to larger outline and different lead spacing. | Select SMBJ12CA-M3/5B only if existing layout accommodates wider 4.57 mm × 3.94 mm body and 2.54 mm lead pitch. |
| 1.5KE12CA-E3/54 | Higher PPPM = 1500 W, same VWM/VBR, but axial DO-201AD package; not SMD-compatible and lacks AEC-Q101 qualification. | Designed for through-hole prototyping or legacy systems; unsuitable for automated SMT assembly or automotive production. | Choose 1.5KE12CA-E3/54 only for manual assembly, high-surge test fixtures, or non-automotive industrial retrofits where board space and qualification are secondary. |
Compared with SMBJ12CA-M3/5B and 1.5KE12CA-E3/54, SMBG12CA-M3/5B offers optimal balance of automotive qualification, compact DO-215AA footprint, and proven 600 W surge handling-making it the preferred choice for new SMT-based automotive and industrial designs requiring zero layout change risk and full AEC-Q101 traceability.
Availability
SMBG12CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN networks, telecom line cards, and consumer USB interface protection requiring stable component supply and long-term lifecycle assurance.
Supply support for SMBG12CA-M3/5B 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 reliability, efficiency, and application-specific performance.
The SMBG series was engineered specifically for high-reliability surface-mount transient suppression in automotive and industrial environments, prioritizing AEC-Q101 compliance, low clamping ratio, and robust thermal performance in compact packages.
FAQ
What does the "CA" suffix indicate in SMBG12CA-M3/5B?
The "CA" suffix denotes a bidirectional configuration, meaning SMBG12CA-M3/5B provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBG12A), it has no cathode marking and delivers identical VBR, IPPM, and VC characteristics in either polarity-ideal for protecting AC signals, differential buses, or floating nodes where polarity is undefined.
Is SMBG12CA-M3/5B compatible with lead-free reflow processes?
Yes, SMBG12CA-M3/5B is fully compatible with lead-free reflow soldering. It meets J-STD-020 MSL Level 1 with a maximum peak temperature of 260 °C, requires no pre-baking, and features matte tin-plated leads qualified to J-STD-002 and JESD 22-B102. The halogen-free (M3) construction further ensures compliance with IPC-J-STD-609 and RoHS Directive 2011/65/EU.
How does SMBG12CA-M3/5B perform under repeated surge stress?
SMBG12CA-M3/5B is rated for repetitive 10/1000 µs surges at 0.01% duty cycle, meaning it can sustain 600 W pulses once every 10 seconds indefinitely when thermally managed per the datasheet's 0.2" × 0.2" copper pad layout. Its glass-passivated junction and low RθJL (20 °C/W) minimize thermal runaway risk, enabling reliable operation in cyclic surge environments like motor drive feedback loops or relay-controlled power rails.
Can SMBG12CA-M3/5B be used in place of a unidirectional TVS like SMBG12A-M3/5B?
No-SMBG12CA-M3/5B is not a drop-in replacement for unidirectional SMBG12A-M3/5B. While both share identical VWM, VBR, and VC, the unidirectional version conducts forward current only and requires correct cathode orientation. Substituting SMBG12CA-M3/5B in a unidirectional circuit may cause unintended conduction during normal bias conditions; always verify polarity requirements and consult the schematic before interchange.
What is the maximum clamping voltage SMBG12CA-M3/5B achieves during a 10/1000 µs surge?
The maximum clamping voltage (VC) of SMBG12CA-M3/5B is 19.9 V, measured at its peak pulse current (IPPM) of 30.2 A under standardized 10/1000 µs waveform conditions. This value represents the worst-case voltage seen by protected circuitry during a full-power transient event and is guaranteed across the operating temperature range (-55 °C to +150 °C) per Vishay's characterization data.
SMBG12CA-M3/5B 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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 30.2A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG12CA-M3/5B FAQ
1.How can I place an order for SMBG12CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG12CA-M3/5B 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 SMBG12CA-M3/5B reliable?
The price and inventory of SMBG12CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG12CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBG12CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG12CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG12CA-M3/5B?
SMBG12CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG12CA-M3/5B 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 SMBG12CA-M3/5B?
For technical support, including SMBG12CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG12CA-M3/5B requirements.
6.How does Aetrix verify that SMBG12CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG12CA-M3/5B 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 SMBG12CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBG12CA-M3/5B?
All SMBG12CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG12CA-M3/5B, 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 SMBG12CA-M3/5B part is unused and in its original packaging.
Return procedure for SMBG12CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG12CA-M3/5B Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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