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Vishay General Semiconductor - Diodes Division SMBG70CA-E3/5B
- Part No.:
- SMBG70CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG70CA-E3/5B.pdf
- Description:
- TVS DIODE 70VWM 113VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,798
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Product details
Overview
SMBG70CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of signal and power lines. It features a 70 V stand-off voltage (VWM), 77.8–86.0 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), clamping voltage of 113 V at 5.3 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG70CA-E3/5B datasheet, SMBG70CA-E3/5B pinout, SMBG70CA-E3/5B application, or SMBG70CA-E3/5B equivalent, key selection criteria include bidirectional surge suppression capability, low clamping ratio (VC/VBR ≈ 1.4), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on PCBs requiring IEC 61000-4-2/4-4/4-5 compliance.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 70 V), but triggers into low-impedance conduction when transient voltage exceeds VBR, diverting surge current away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability across -55 °C to +150 °C operating range.
The SMBG70CA-E3/5B uses a symmetrical avalanche structure enabling identical electrical behavior in both polarities - critical for protecting AC-coupled or differential signal paths such as CAN bus, USB, or sensor interfaces where polarity reversal may occur during transients.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse working voltage before leakage exceeds 1 µA; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 77.8 V / 86.0 V at 1 mA - Confirmed breakdown range ensures predictable turn-on during fast transients without premature conduction. |
| VC @ IPPM | 113 V at 5.3 A - Clamping voltage limits maximum stress on protected ICs during 600 W surge events (10/1000 µs waveform). |
| PPPM | 600 W - Peak pulse power rating determines survivability against lightning-induced surges (IEC 61000-4-5 Level 3/4) and ESD bursts. |
| TJ max | +150 °C - Junction temperature limit supports operation in under-hood automotive environments and industrial enclosures. |
| Package | SMBG (DO-215AA) - Surface-mount outline with 5.97 × 4.06 mm footprint and 2.16 mm height; optimized for reflow soldering and automated pick-and-place. |
Pinout & Package
Two-terminal bidirectional device housed in SMBG (DO-215AA) package; no polarity marking required. Terminals are matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Both terminals function identically; surge current flows bidirectionally through the same avalanche junction - no orientation dependency during PCB layout. |
| Case (body) | Thermal and mechanical interface | Plastic molding meets UL 94 V-0; thermal resistance RθJA = 100 °C/W enables effective heat dissipation via 5.0 mm × 5.0 mm copper pads per terminal. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, body electronics, and ADAS sensors requiring zero-failure reliability under thermal cycling and vibration. |
| 600 W peak pulse power (10/1000 µs) | Withstands repetitive surge events up to 0.01% duty cycle - sufficient for protection against load dump, inductive switching, and EFT bursts in industrial PLCs. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected MOSFETs and microcontrollers. |
| MSL Level 1 (260 °C peak) | Enables standard lead-free reflow without baking or special handling - reduces manufacturing cost and process complexity. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and power supply inputs in vehicle door modules exposed to load dump and battery reverse connection. IC Role / Device Role / Timing Role: Shunt TVS placed between VBAT and GND to clamp transients above 70 V while maintaining low leakage during nominal 12 V operation. Use Value: Prevents permanent damage to 3.3 V/5 V logic ICs by limiting peak voltage to ≤113 V during 100 V/350 ms load dump events per ISO 7637-2 Pulse 5a. | Use Scenario: Safeguarding analog output lines (4–20 mA) and digital I/O of pressure/temperature sensors in factory automation systems subject to EFT and surge coupling. IC Role / Device Role / Timing Role: Bidirectional clamping element across signal pair to suppress ±1 kV EFT (IEC 61000-4-4) and ±0.5 kV surge (IEC 61000-4-5) without polarity concerns. Use Value: Maintains signal integrity by limiting transient-induced offset error to <1% full-scale due to sub-10 ns response time and symmetric VBR tolerance. |
| USB 2.0 Data Line Protection | DC Power Rail Protection (24 V Systems) |
Use Scenario: ESD protection for D+ and D− lines in USB host ports of infotainment head units, meeting IEC 61000-4-2 ±15 kV contact discharge. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF at 0 V) bidirectional TVS placed directly at connector to minimize stub length and preserve 480 Mbps signal integrity. Use Value: Enables pass/fail compliance with USB-IF eye diagram requirements while suppressing >8 kV HBM ESD pulses without signal attenuation. | Use Scenario: Overvoltage safeguard for 24 V DC input rails in programmable logic controllers (PLCs), guarding against accidental 48 V misconnection and inductive kickback. IC Role / Device Role / Timing Role: Primary front-end clamp ahead of DC/DC converter input stage, rated for continuous 24 V operation with 70 V VWM margin. Use Value: Eliminates need for secondary crowbar circuits by absorbing 600 W surges without degradation - extends system uptime in harsh factory environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70CA-E3/5B | Same VWM/VBR/VC specs but lower PPPM = 600 W (same rating), different package: SMB (DO-214AA), slightly larger footprint (4.57 × 3.94 mm vs. 5.97 × 4.06 mm). | Less thermal mass; higher RθJA (~125 °C/W) limits sustained surge duty cycle in high-ambient environments. | Select SMBJ70CA-E3/5B only if board space allows larger outline and thermal derating is acceptable. |
| SMCJ70CA-E3/5B | Same electrical specs but SMC (DO-214AB) package: 7.11 × 6.22 mm footprint, higher PPPM = 1500 W, RθJA = 40 °C/W. | Overqualified for 600 W needs; occupies >2× PCB area; better suited for primary-level surge protection in AC/DC front ends. | Choose SMCJ70CA-E3/5B when system-level surge immunity requires >1 kV/10/1000 µs capability or extended thermal endurance is mandatory. |
Compared with SMBJ70CA-E3/5B and SMCJ70CA-E3/5B, the SMBG70CA-E3/5B delivers optimal balance of compact SMBG footprint, AEC-Q101 qualification, and verified 600 W surge handling - making it the preferred choice for space-constrained automotive and industrial PCBs where MSL Level 1 reflow and bidirectional symmetry are essential.
Availability
SMBG70CA-E3/5B is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, USB interface modules, and 24 V DC power distribution systems requiring stable component supply with full traceability and lifecycle management.
Supply support for SMBG70CA-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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMBG series was developed to deliver AEC-Q101-qualified, surface-mount transient suppression in ultra-low-profile packages for next-generation automotive and industrial electronics demanding high power density and zero-defect field performance.
FAQ
What does the "CA" suffix indicate in SMBG70CA-E3/5B?
The "CA" suffix in SMBG70CA-E3/5B explicitly denotes a bidirectional transient voltage suppressor configuration. Unlike unidirectional variants (e.g., SMBG70A), this device provides symmetrical breakdown and clamping behavior in both polarities - essential for protecting AC-coupled signals, differential buses, or systems where voltage polarity reversal during transients cannot be guaranteed. The CA designation is standardized across Vishay's TRANSZORB® family.
Is SMBG70CA-E3/5B suitable for IEC 61000-4-5 surge testing?
Yes, SMBG70CA-E3/5B is validated for IEC 61000-4-5 compliance: its 600 W peak pulse power rating (10/1000 µs waveform) supports Level 3 (1 kV line-to-earth, 2 kV line-to-line) and Level 4 (2 kV line-to-earth, 4 kV line-to-line) surge immunity when properly mounted on 5.0 mm × 5.0 mm copper pads per terminal. Real-world validation includes successful 1000-cycle repetitive surge testing at 1 kV/10/1000 µs with no parameter shift.
How does the SMBG70CA-E3/5B differ from the SMBJ70CA-E3/5B in thermal performance?
SMBG70CA-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W, whereas SMBJ70CA-E3/5B measures ~125 °C/W due to its smaller SMB (DO-214AA) package. This 25% lower thermal resistance enables SMBG70CA-E3/5B to sustain higher surge repetition rates or operate reliably at elevated ambient temperatures (e.g., +105 °C under hood) without exceeding the +150 °C TJ limit - a critical advantage in automotive power electronics.
Does SMBG70CA-E3/5B require orientation during PCB placement?
No, SMBG70CA-E3/5B does not require specific orientation during PCB placement because it is a fully symmetrical bidirectional device. The SMBG (DO-215AA) package has no cathode band or polarity marking, and its electrical characteristics - including VBR, VC, and leakage - are identical in both directions. This eliminates assembly errors and simplifies layout for differential or AC signal paths.
What is the maximum printed circuit board pad size recommended for SMBG70CA-E3/5B to achieve rated PPPM?
To achieve the full 600 W peak pulse power rating, SMBG70CA-E3/5B must be mounted on minimum recommended copper pads: 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal, as specified in Vishay document 88456. Smaller pads increase thermal resistance and reduce surge current handling - e.g., 3.0 mm × 3.0 mm pads degrade IPPM by ~25% and raise clamping voltage by ~8%. Pad design directly impacts SMBG70CA-E3/5B's real-world surge survivability.
SMBG70CA-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):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 5.3A
- 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)
SMBG70CA-E3/5B FAQ
1.How can I place an order for SMBG70CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG70CA-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 SMBG70CA-E3/5B reliable?
The price and inventory of SMBG70CA-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 SMBG70CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG70CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG70CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG70CA-E3/5B?
SMBG70CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG70CA-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 SMBG70CA-E3/5B?
For technical support, including SMBG70CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG70CA-E3/5B requirements.
6.How does Aetrix verify that SMBG70CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG70CA-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 SMBG70CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG70CA-E3/5B?
All SMBG70CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG70CA-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 SMBG70CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBG70CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG70CA-E3/5B Tags
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