My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBG70CA-E3/52
- Part No.:
- SMBG70CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG70CA-E3/52.pdf
- Description:
- TVS DIODE 70VWM 113VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,768
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBG70CA-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 or 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), <113 V maximum clamping voltage (VC) at 5.3 A, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMBG70CA-E3/52 datasheet, SMBG70CA-E3/52 pinout, SMBG70CA-E3/52 application, or SMBG70CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.45), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both polarities due to its bidirectional construction, enabling protection of AC-coupled or differential signal lines without polarity constraints. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ns), critical for suppressing ESD and lightning-induced surges before IC damage occurs.
The device uses a low incremental surge resistance design to minimize voltage overshoot during high-current transients, and its thermal resistance (RθJA = 100 °C/W) supports reliable operation up to +150 °C junction temperature when mounted per recommended pad layout - essential for under-hood automotive modules and industrial motor drives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 77.8 V / 86.0 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on across production lots. |
| VC @ IPPM | ≤113 V at 5.3 A - Clamped voltage during 600 W transient; determines worst-case stress on downstream components. |
| PPPM | 600 W (10/1000 µs waveform) - Peak surge power handling capacity; validates compliance with IEC 61000-4-5 Level 3/4. |
| ID @ VWM | ≤1.0 µA - Reverse leakage current at stand-off voltage; ensures minimal power loss and signal integrity in high-impedance paths. |
| TJ max | +150 °C - Maximum junction temperature; enables deployment in engine control units and power inverters without derating. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, gull-wing lead form with matte tin plating; meets UL 94 V-0, MSL Level 1 (260 °C peak reflow), and JESD201 Class 2 whisker resistance. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical PN junction; conducts during negative-going surges to clamp voltage below -VC. |
| Cathode | Transient current entry (positive polarity) | Second terminal of symmetrical PN junction; conducts during positive-going surges to clamp voltage above +VC. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., CAN, RS-485), and ungrounded power rails without polarity concerns. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 4 kV surge (line-earth) and ISO 7637-2 Pulse 1/2b/5a in automotive ECUs without degradation. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity exposure per AEC-Q101 requirements. |
| Low clamping ratio (VC/VBR) | ~1.45 typical - Minimizes overvoltage stress on protected ICs compared to higher-ratio TVS devices. |
| Automated placement compatible | Gull-wing leads and defined coplanarity (≤0.008") support high-yield pick-and-place assembly at >30,000 UPH. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus transceivers and body control module power inputs from load dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between battery rail and regulator input to limit surge energy entering downstream LDOs and microcontrollers. Use Value: Withstands 12 V system load dump (ISO 7637-2 Pulse 5a) up to 60 V peak and clamps to ≤113 V, preserving regulator SOA and preventing latch-up. | Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLCs from inductive switching noise. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at sensor output connector to shunt EFT bursts (IEC 61000-4-4) before reaching ADC front-end. Use Value: Sub-1.0 µA leakage at 70 V ensures no DC error in 4–20 mA loops; fast response prevents ADC saturation during 5 kV EFT events. |
| Telecom Data Line Surge Suppression | Consumer USB Port ESD Protection |
Use Scenario: Safeguarding Ethernet PHY interfaces in PoE-powered switches against lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired bidirectional TVS devices on each twisted pair, referenced to chassis ground, to divert mode-conversion transients. Use Value: Symmetric clamping (±113 V) maintains signal integrity across differential pairs while meeting IEC 61000-4-5 10/700 µs surge immunity. | Use Scenario: Adding secondary-level ESD protection to USB 2.0 D+/D− lines in portable media players after integrated port protection. IC Role / Device Role / Timing Role: Standby clamping element that activates only during >8 kV HBM ESD events, complementing internal I/O cell diodes. Use Value: 113 V clamping voltage avoids false triggering during normal 3.3 V signaling; AEC-Q101 qualification ensures robustness in drop-test environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ70CA | Same VWM (70 V), identical SMB (DO-214AA) package but lower PPPM (600 W same), slightly higher VC (115 V vs. 113 V). | Lower thermal resistance (RθJA = 85 °C/W vs. 100 °C/W) allows marginally higher ambient operation in dense layouts. | Select SMBJ70CA if board space permits larger SMB footprint and thermal performance is prioritized over strict AEC-Q101 compliance. |
| SMCJ70CA | Same VWM and bidirectional function, but SMC (DO-214AB) package with 1500 W PPPM; larger footprint and higher IPPM (13.3 A). | Designed for primary-level surge protection (e.g., AC input stages); not optimized for fine-pitch signal line placement. | Choose SMCJ70CA only when protecting high-energy sources like 24 V industrial power rails where 600 W is insufficient. |
Compared with SMBJ70CA and SMCJ70CA, SMBG70CA-E3/52 uniquely combines AEC-Q101 qualification, SMBG's compact DO-215AA footprint (smaller than SMB/SMC), and validated performance on 5.0 mm × 5.0 mm pads - making it optimal for space-constrained automotive and industrial PCBs requiring certified reliability.
Availability
SMBG70CA-E3/52 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC I/O modules, telecom base station data ports, and consumer USB-C accessory designs requiring stable component supply and full traceability.
Supply support for SMBG70CA-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 automotive-grade validation.
The SMBG series was engineered specifically for high-reliability surface-mount transient suppression in automotive and industrial environments, balancing compact size, AEC-Q101 compliance, and repeatable clamping performance under thermal stress.
FAQ
What does the "CA" suffix indicate in SMBG70CA-E3/52?
The "CA" suffix in SMBG70CA-E3/52 denotes a bidirectional configuration, meaning the device provides symmetrical transient voltage suppression for both positive and negative polarity surges. This is confirmed in Vishay's documentation, which states "for bidirectional devices use CA suffix" and specifies identical electrical characteristics in both directions - unlike unidirectional "A" variants that require cathode orientation.
Is SMBG70CA-E3/52 RoHS compliant and halogen-free?
Yes, SMBG70CA-E3/52 is RoHS compliant per the "E3" suffix designation, indicating industrial-grade, lead-free, and RoHS-compliant construction. However, it is not halogen-free; halogen-free versions carry the "M3" suffix (e.g., SMBG70CA-M3/52). The E3 variant uses matte tin-plated leads and meets J-STD-002 solderability standards.
What is the maximum clamping voltage for SMBG70CA-E3/52 and at what current is it specified?
The maximum clamping voltage (VC) for SMBG70CA-E3/52 is 113 V, measured at the peak pulse current (IPPM) of 5.3 A under a 10/1000 µs waveform. This value is explicitly listed in the Electrical Characteristics table on page 2 of Vishay document 88456 and defines the upper voltage limit imposed on protected circuitry during a 600 W transient event.
Does SMBG70CA-E3/52 require a heatsink for standard operation?
No, SMBG70CA-E3/52 does not require an external heatsink for standard transient suppression operation. Its thermal design relies on PCB copper pad conduction: Vishay specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, achieving RθJA = 100 °C/W. Heatsinking is unnecessary unless subjected to repetitive surges exceeding duty cycle limits (0.01 %).
How does SMBG70CA-E3/52 differ from SMBG70A-E3/52 in practical circuit design?
SMBG70CA-E3/52 is bidirectional with symmetrical clamping, while SMBG70A-E3/52 is unidirectional and requires correct cathode orientation toward the protected line's positive side. The "CA" version eliminates polarity concerns in AC-coupled or differential applications (e.g., CAN bus), whereas the "A" variant offers lower forward voltage (VF = 3.5 V at 50 A) - relevant only for DC power path crowbar use cases.
SMBG70CA-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):
- 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-E3/52 FAQ
1.How can I place an order for SMBG70CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG70CA-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 SMBG70CA-E3/52 reliable?
The price and inventory of SMBG70CA-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 SMBG70CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG70CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG70CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG70CA-E3/52?
SMBG70CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG70CA-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 SMBG70CA-E3/52?
For technical support, including SMBG70CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG70CA-E3/52 requirements.
6.How does Aetrix verify that SMBG70CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG70CA-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 SMBG70CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG70CA-E3/52?
All SMBG70CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG70CA-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 SMBG70CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBG70CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG70CA-E3/52 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
