My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMB8J7.0CA-E3/5B
- Part No.:
- SMB8J7.0CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.0CA-E3/5B.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,939
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMB8J7.0CA-E3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 7.0 V stand-off voltage (VWM), 12.0 V maximum clamping voltage (VC) at 400 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J7.0CA-E3/5B datasheet, SMB8J7.0CA-E3/5B pinout, SMB8J7.0CA-E3/5B application, or SMB8J7.0CA-E3/5B equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, thermal resistance (RθJA = 72 °C/W), junction temperature range (–55 to +150 °C), and RoHS-compliant commercial-grade sourcing via E3 suffix.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling robust protection against ESD, lightning-induced transients, and inductive switching spikes without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior, low incremental surge resistance, and fast response time (<1 ns), meeting ANSI/IEEE C62.35 standards for transient suppression.
The device is rated for 400 A peak pulse current (10/1000 µs) at 7.0 V stand-off, clamping to ≤12.0 V - critical for safeguarding 5 V–12 V logic interfaces and analog sensor inputs. Thermal performance is defined by RθJL = 20 °C/W and RθJA = 72 °C/W on standard 0.2" × 0.2" copper pads, supporting reliable operation up to TJ = +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - maximum continuous reverse operating voltage before clamping begins; sets threshold for protecting 5 V–7 V digital/analog circuits |
| VBR min/max | 7.78 V / 8.60 V at IT = 10 mA - tight breakdown tolerance ensures predictable turn-on during transients |
| VC @ IPPM | 12.0 V at IPPM = 400 A - limits voltage seen by downstream ICs during 800 W surge events |
| PPPM | 800 W (10/1000 µs) - defines energy-handling capability for automotive load-dump and ISO 7637-2 pulse 1/2/5a compliance |
| ID @ VWM | 1.0 µA - ultra-low leakage preserves signal integrity and battery life in always-on sensor nodes |
| TJ max | +150 °C - enables under-hood automotive deployment and industrial environments with elevated ambient temperatures |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with automated assembly; 0.220" × 0.130" body size fits dense PCB layouts |
Pinout & Package
Two-terminal bidirectional device in SMB (DO-214AA) package; no polarity marking - symmetrical terminals function identically for AC-coupled or dual-rail protection paths.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals serve as interchangeable surge current entry/exit points; no cathode band - supports bidirectional clamping without orientation constraints |
| Case (body) | Thermal and mechanical interface | Plastic molded case with UL 94 V-0 rating; transfers heat to PCB copper pads (0.2" × 0.2" per terminal recommended) |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment I/O - meets stress test requirements for temperature cycling, HTRB, and ESD |
| Glass passivated junction | Ensures stable VBR over lifetime and temperature; eliminates parameter drift due to moisture or contamination in harsh environments |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes overvoltage stress on protected ICs - critical for 3.3 V/5 V microcontrollers and precision analog front-ends |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without pre-baking; supports high-yield SMT manufacturing |
| RoHS-compliant E3 suffix | Meets EU RoHS Directive 2011/65/EU and JESD201 Class 2 whisker resistance - suitable for commercial and industrial production |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector or IC input pins to shunt surge energy before it reaches sensitive circuitry. Use Value: Clamps 400 A transients to ≤12.0 V while maintaining <1.0 µA leakage - preserving signal fidelity and meeting ISO 16750-2 pulse 5a requirements. | Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring surges and relay coil flyback. IC Role / Device Role / Timing Role: Primary transient suppressor on dry-contact or optocoupler input channels, mounted adjacent to terminal blocks. Use Value: Withstands 800 W pulses and operates from –55 °C to +150 °C - ensuring reliability in uncontrolled factory environments. |
| Consumer USB Port Protection | Telecom Line Interface Protection |
Use Scenario: Shielding USB 2.0 data lines (D+/D–) and VBUS from ESD events (>±15 kV contact) in portable docking stations and peripherals. IC Role / Device Role / Timing Role: Low-capacitance TVS placed inline with differential pairs to suppress fast transients without signal degradation. Use Value: 12.0 V clamping voltage prevents latch-up in USB PHYs; bidirectional symmetry avoids layout polarity errors during assembly. | Use Scenario: Protecting Ethernet PHYs and POTS line drivers in VoIP gateways and DSL modems from lightning-induced surges on RJ-11/RJ-45 ports. IC Role / Device Role / Timing Role: First-stage protector on tip/ring or differential pair, coordinated with GDT or MOV secondary stages. Use Value: 7.0 V VWM aligns with 5 V bias rails; 800 W PPPM handles telecom-specified 10/700 µs surges when derated per Fig. 2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0CA-E3/5B | Unidirectional variant (SMBJ series) with same VWM/VBR/VC but lower PPPM (600 W) and IPPM (32.2 A) | Not suitable for AC-coupled or floating signal lines requiring symmetrical clamping | Select SMB8J7.0CA-E3/5B when bidirectional clamping and 800 W surge handling are mandatory |
| SMCJ7.0CA-E3/57T | Same VWM/VBR/VC but in larger SMC (DO-214AB) package; higher PPPM (1500 W), IPPM (123 A), and RθJA (30 °C/W) | Better thermal performance and surge margin, but requires 30% larger PCB area and different pad layout | Choose SMCJ7.0CA-E3/57T only if system-level surge testing exceeds 800 W or board space permits larger footprint |
Compared with SMBJ7.0CA-E3/5B and SMCJ7.0CA-E3/57T, SMB8J7.0CA-E3/5B uniquely balances 800 W bidirectional surge capability, SMB footprint efficiency, and AEC-Q101 qualification - making it optimal for space-constrained automotive and industrial edge nodes where polarity-agnostic protection is required.
Availability
SMB8J7.0CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, RoHS compliance, and AEC-Q101 validation.
Supply support for SMB8J7.0CA-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, MOSFETs, and protection devices with emphasis on reliability, automotive qualification, and high-power density packaging.
The SMB8J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in automotive, industrial, and communications infrastructure - prioritizing low clamping voltage, fast response, and AEC-Q101 compliance.
FAQ
What is the clamping voltage of SMB8J7.0CA-E3/5B and how does it protect downstream ICs?
The SMB8J7.0CA-E3/5B clamps to a maximum of 12.0 V at 400 A peak pulse current (10/1000 µs). This limits overvoltage stress on protected components such as microcontrollers, transceivers, or ADCs - ensuring they remain within safe operating voltage margins during surge events. The low VC/VWM ratio (1.71) reflects high suppression efficiency, directly contributing to system-level robustness in automotive and industrial applications where SMB8J7.0CA-E3/5B is deployed.
Is SMB8J7.0CA-E3/5B suitable for automotive applications?
Yes, SMB8J7.0CA-E3/5B is AEC-Q101 qualified and explicitly listed in Vishay's automotive ordering codes (HE3/HM3 variants). Its construction - glass-passivated junction, MSL Level 1 rating, and operation from –55 °C to +150 °C - meets automotive environmental and reliability requirements. The SMB8J7.0CA-E3/5B is commonly used in engine control units, ADAS camera modules, and body electronics where bidirectional transient suppression is needed on sensor or communication lines.
How does SMB8J7.0CA-E3/5B differ from unidirectional TVS diodes like SMBJ7.0A-E3/5B?
SMB8J7.0CA-E3/5B is bidirectional with symmetrical clamping behavior in both polarities, while SMBJ7.0A-E3/5B is unidirectional and conducts only in reverse bias. This makes SMB8J7.0CA-E3/5B ideal for AC-coupled signals, differential buses (e.g., RS-485), or floating inputs where polarity is undefined. Additionally, SMB8J7.0CA-E3/5B offers higher peak pulse power (800 W vs. 600 W) and surge current (400 A vs. 32.2 A), enhancing its suitability for demanding transient environments.
What is the thermal resistance of SMB8J7.0CA-E3/5B and how does it affect PCB layout?
SMB8J7.0CA-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. This value assumes standard FR-4 PCB with minimum recommended pad layout per Vishay's outline drawing. To maintain TJ ≤ 150 °C under repeated surges, designers must ensure adequate copper area and avoid excessive trace length between the SMB8J7.0CA-E3/5B and ground planes - especially in high-temperature ambient deployments like under-hood automotive systems.
Does SMB8J7.0CA-E3/5B require orientation during PCB placement?
No - SMB8J7.0CA-E3/5B is a bidirectional TVS diode with no polarity marking (no cathode band), and its terminals are functionally identical. This eliminates orientation-dependent assembly errors and simplifies automated placement on PCBs with differential or AC-coupled signal paths. Unlike unidirectional variants (e.g., SMBJ7.0A), the SMB8J7.0CA-E3/5B can be placed in either direction without affecting clamping performance or circuit functionality.
SMB8J7.0CA-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 66.7A
- Power - Peak Pulse:
- 800W
- 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 (SMB)
SMB8J7.0CA-E3/5B FAQ
1.How can I place an order for SMB8J7.0CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.0CA-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 SMB8J7.0CA-E3/5B reliable?
The price and inventory of SMB8J7.0CA-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 SMB8J7.0CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J7.0CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.0CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.0CA-E3/5B?
SMB8J7.0CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.0CA-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 SMB8J7.0CA-E3/5B?
For technical support, including SMB8J7.0CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.0CA-E3/5B requirements.
6.How does Aetrix verify that SMB8J7.0CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J7.0CA-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 SMB8J7.0CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J7.0CA-E3/5B?
All SMB8J7.0CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.0CA-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 SMB8J7.0CA-E3/5B part is unused and in its original packaging.
Return procedure for SMB8J7.0CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.0CA-E3/5B 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 …
