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Vishay General Semiconductor - Diodes Division SMBG70CA-M3/52
- Part No.:
- SMBG70CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG70CA-M3/52.pdf
- Description:
- TVS DIODE 70VWM 113VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,614
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Product details
Overview
SMBG70CA-M3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping voltage transients on signal or power lines. It features 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), 113 V maximum clamping voltage at 5.3 A IPPM, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMBG70CA-M3/52 datasheet, SMBG70CA-M3/52 pinout, SMBG70CA-M3/52 application, or SMBG70CA-M3/52 equivalent, this device is selected for robust ESD and surge protection in bidirectional DC bus, sensor interfaces, and automotive infotainment power rails where low clamping voltage and halogen-free compliance are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (77.8 V / 86.0 V) and VC (113 V) in either direction under 10/1000 μs surge. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1.0 ps), enabling protection of high-speed analog and digital signal paths without signal distortion.
The SMBG70CA-M3/52 uses a planar junction structure housed in an MSL Level 1, halogen-free, RoHS-compliant SMBG package. Thermal resistance is RθJA = 100 °C/W (on 5.0 mm × 5.0 mm copper pads), supporting operation from –55 °C to +150 °C junction temperature - critical for under-hood automotive deployments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected line. |
| VBR (min/max) | 77.8 V / 86.0 V at IT = 1 mA - Tight breakdown window ensures predictable turn-on and minimal overshoot during transients. |
| VC @ IPPM | 113 V at 5.3 A - Clamping voltage under full 600 W surge; limits stress on downstream ICs like CAN transceivers or MCU I/O. |
| PPPM | 600 W (10/1000 μs) - Sustains high-energy lightning-induced surges per IEC 61000-4-5 Level 4 without degradation. |
| ID @ VWM | <1.0 μA - Ultra-low leakage preserves battery life in always-on automotive modules and avoids false triggering. |
| TJ max. | +150 °C - Enables placement near heat sources (e.g., power converters) in engine control units without derating. |
| Qualification | AEC-Q101 - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD (HBM ≥ 8 kV). |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminals suitable for AC-coupled or floating lines.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as anode or cathode depending on transient polarity; no band marking required. |
| Case (cathode side) | Thermal and mechanical anchor | Exposed metal pad provides thermal conduction path to PCB copper; requires minimum 5.0 mm × 5.0 mm copper area per terminal. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 μs) | Withstands repeated ISO 7637-2 Pulse 5a/b surges in automotive 12 V systems without parameter shift. |
| AEC-Q101 qualified | Validated for automotive under-hood environments including 1000-cycle temperature cycling (–40 °C to +125 °C) and high-temp reverse bias life testing. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets JESD201 Class 2 whisker resistance and EU ELV Directive requirements for sustainable vehicle manufacturing. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage exposure to protected devices - e.g., keeps 3.3 V MCU I/O below absolute maximum rating during 1 kV EFT burst. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting LIN/CAN bus power rails and microcontroller supply inputs against load dump and alternator ripple in body control modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between VBAT and GND, absorbing energy before it reaches LDOs or transceivers. Use Value: Withstands 12 V system load dump (ISO 16750-2) up to 35 V for 400 ms while maintaining <1.0 μA leakage to avoid battery drain. | Use Scenario: Shielding 4–20 mA current loop transmitters and RS-485 nodes from induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary surge shunt on field-side signal/power lines, located upstream of isolation barriers or signal conditioners. Use Value: 113 V clamping voltage ensures protected amplifier input stays within ±15 V rail limits during 1 kV/500 Ω surge events per IEC 61000-4-5. |
| Consumer Audio Signal Path | Telecom DSL Line Interface |
Use Scenario: Guarding analog audio inputs/outputs (e.g., headphone jacks, line-in) in smart speakers against ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp (CJ ≈ 100 pF at 0 V) placed directly at connector, minimizing stub length. Use Value: Sub-1 ns response time prevents ESD pulses from propagating into codec ICs, meeting IEC 61000-4-2 Level 4 (±8 kV contact). | Use Scenario: Front-end protection for ADSL/VDSL line drivers and hybrid couplers exposed to lightning-induced surges on outside plant wiring. IC Role / Device Role / Timing Role: First-stage transient suppressor on twisted-pair line interface, coordinated with gas discharge tube (GDT) secondary protection. Use Value: 600 W rating enables coordination with GDT let-through energy, limiting residual surge to <100 V at line driver input per GR-1089-CORE. |
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-M3/52 | Same VWM (70 V), but lower PPPM (400 W); smaller SMB (DO-214AA) package (3.5 mm × 3.5 mm vs. 4.6 mm × 3.9 mm). | Limited to lower-energy transients (IEC 61000-4-4 Level 3); unsuitable for automotive load dump. | Select SMBG70CA-M3/52 when 600 W surge handling and AEC-Q101 qualification are mandatory. |
| SMCJ70CA-M3 | Same VWM and bidirectionality, but higher PPPM (1500 W); larger SMC (DO-214AB) package (7.1 mm × 6.2 mm). | Overqualified for space-constrained PCBs; adds 3× footprint area and higher parasitic inductance. | Choose SMBG70CA-M3/52 where board space is constrained and 600 W meets system-level surge test requirements. |
Compared with SMBJ70CA-M3/52 and SMCJ70CA-M3, the SMBG70CA-M3/52 delivers optimal balance of 600 W surge capability, AEC-Q101 compliance, and compact SMBG footprint - making it the preferred choice for automotive and industrial designs requiring validated reliability without oversizing.
Availability
SMBG70CA-M3/52 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, consumer audio interfaces, and telecom line cards requiring stable component supply with halogen-free and AEC-Q101 assurance.
Supply support for SMBG70CA-M3/52 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 automotive, industrial, and computing applications.
The SMBG series was engineered specifically for high-reliability bidirectional transient suppression in space-constrained, thermally demanding environments - targeting automotive power distribution, industrial fieldbus interfaces, and consumer port protection.
FAQ
What does the "CA" suffix indicate in SMBG70CA-M3/52?
The "CA" suffix denotes a bidirectional configuration - meaning the SMBG70CA-M3/52 provides symmetrical clamping in both forward and reverse directions, with identical VBR and VC characteristics across polarity. This eliminates need for orientation during placement and supports AC-coupled or floating signal lines, unlike unidirectional "A" variants which require cathode alignment.
Is SMBG70CA-M3/52 suitable for protecting CAN FD physical layer circuits?
Yes - the SMBG70CA-M3/52 is widely deployed for CAN FD bus protection. Its 113 V clamping voltage at 5.3 A ensures transceiver inputs remain within absolute maximum ratings during ISO 11898-2 defined surges, and its <100 pF junction capacitance (at 0 V) avoids signal integrity degradation at 5 Mbps data rates.
How does the M3 suffix differ from E3 in SMBG70CA-M3/52?
The M3 suffix indicates halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance, whereas E3 is RoHS-compliant but not halogen-free. Both meet industrial grade reliability, but SMBG70CA-M3/52 satisfies stricter environmental mandates such as EU ELV and automotive OEM material declarations requiring bromine/chlorine content <900 ppm.
What is the recommended PCB pad layout for SMBG70CA-M3/52?
Vishay specifies minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for SMBG70CA-M3/52 to achieve rated 600 W pulse power and thermal resistance (RθJA = 100 °C/W). Pad design must follow DO-215AA outline with 0.077–0.083" (1.96–2.10 mm) lead width and 0.130–0.155" (3.30–3.94 mm) terminal length to ensure solder joint reliability and thermal dissipation.
Does SMBG70CA-M3/52 require derating at elevated ambient temperatures?
Yes - SMBG70CA-M3/52 must be derated above TA = 25 °C per Figure 2 in Vishay document 88456. At 85 °C ambient, peak pulse power drops to ~420 W (70 % of 600 W), and at 125 °C it falls to ~240 W (40 %). Derating ensures junction temperature remains ≤150 °C during surge events and maintains long-term reliability in under-hood applications.
SMBG70CA-M3/52 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):
- 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:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG70CA-M3/52 FAQ
1.How can I place an order for SMBG70CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG70CA-M3/52 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 SMBG70CA-M3/52 reliable?
The price and inventory of SMBG70CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG70CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBG70CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG70CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG70CA-M3/52?
SMBG70CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG70CA-M3/52 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 SMBG70CA-M3/52?
For technical support, including SMBG70CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG70CA-M3/52 requirements.
6.How does Aetrix verify that SMBG70CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG70CA-M3/52 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 SMBG70CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBG70CA-M3/52?
All SMBG70CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG70CA-M3/52, 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 SMBG70CA-M3/52 part is unused and in its original packaging.
Return procedure for SMBG70CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG70CA-M3/52 Tags
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