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Vishay General Semiconductor - Diodes Division SMB8J7.0CAHM3_B/I
- Part No.:
- SMB8J7.0CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.0CAHM3_B/I.pdf
- Description:
- 800W,7.0V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,668
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Product details
Overview
SMB8J7.0CAHM3_B/I 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 - optimized for automotive-grade ESD and load-dump protection in sensor interfaces and power supply rails.
For engineers reviewing the SMB8J7.0CAHM3_B/I datasheet, SMB8J7.0CAHM3_B/I pinout, SMB8J7.0CAHM3_B/I application, or SMB8J7.0CAHM3_B/I equivalent, this device delivers AEC-Q101 qualified robustness, low incremental surge resistance, and halogen-free RoHS compliance - critical for automotive infotainment, ADAS camera modules, and industrial I/O protection where reliability under repetitive transients is mandatory.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM), while the MSL Level 1 rating supports lead-free reflow up to 260 °C.
The device complies with ANSI/IEEE C62.35 surge standards and achieves thermal resistance of RθJA = 72 °C/W (typ.) on 0.2" × 0.2" copper pads. Its 150 °C maximum junction temperature and AEC-Q101 qualification confirm suitability for under-hood automotive environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - reverse stand-off voltage; defines maximum continuous operating voltage before significant leakage begins |
| VBR min/max | 7.78 V / 8.60 V at 10 mA - guaranteed breakdown onset range ensures predictable turn-on during surges |
| VC @ IPPM | 12.0 V at 400 A - clamping voltage limits downstream IC stress during 10/1000 μs transients |
| PPPM | 800 W - peak pulse power handling capacity per 10/1000 μs waveform, defining surge energy absorption |
| ID @ VWM | <1.0 μA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150 °C - enables operation in high-temperature automotive and industrial ambient conditions |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping occurs regardless of voltage polarity applied |
| Case (body) | Thermal and mechanical interface | Plastic molded case meets UL 94 V-0; provides mechanical stability and thermal path to PCB copper pads |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating lines without polarity concerns |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations and JESD201 Class 2 whisker resistance for long-term solder joint reliability |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V and 5 V logic interfaces |
| MSL Level 1 moisture sensitivity | Allows standard SMT reflow without baking; compatible with automated placement and high-volume manufacturing |
| Glass-passivated junction | Ensures stable VBR over lifetime and improved resistance to humidity-induced parameter drift |
Applications
| Automotive Camera Power Rail | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting 12 V power input to rear-view or surround-view camera modules exposed to load-dump transients up to 35 V. IC Role / Device Role / Timing Role: Bidirectional TVS clamps both positive load-dump spikes and negative reverse-battery events. Use Value: Prevents damage to image sensor and serializer ICs by limiting rail voltage to ≤12.0 V during 400 A surges. |
Use Scenario: Shielding CANH/CANL differential pair against ESD and inductive switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: Placed across CAN bus lines to clamp common-mode transients while preserving signal integrity. Use Value: Maintains <1.0 μA leakage at 5 V nominal bus voltage, avoiding false dominant states or timing jitter. |
| Automotive Infotainment USB Port | Smart Sensor Signal Line Protection |
Use Scenario: Safeguarding USB 2.0 D+/D− lines in head-unit applications subjected to ISO 10605 ESD events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamping prevents data corruption during ±15 kV contact discharge. Use Value: Achieves sub-12 V clamping at 400 A without adding measurable signal rise-time degradation. |
Use Scenario: Protecting analog output (e.g., 4–20 mA or 0–5 V) of pressure/temperature sensors in engine control units. IC Role / Device Role / Timing Role: Mounted directly at connector entry point to shunt induced transients before reaching ADC front-end. Use Value: With 7.0 V VWM, it remains inactive during normal sensor operation yet triggers reliably for >8 V surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J7.0CAHE3_B/I | Same electrical specs; RoHS-compliant but not halogen-free; lacks JESD201 Class 2 whisker rating | Acceptable for commercial/industrial use; not approved for automotive under hood | Select when halogen-free requirement is waived and cost optimization is prioritized |
| SMAJ7.0CA-M3/5B | Lower PPPM (400 W vs. 800 W); SMA package (smaller footprint, higher RθJA = 85 °C/W) | Suitable only for lower-energy transients; less thermal margin in confined layouts | Choose only if board space is constrained and surge threat level is limited to IEC 61000-4-5 Level 2 |
Compared with SMB8J7.0CAHE3_B/I, the HM3 version adds halogen-free compliance and whisker resistance for automotive longevity; versus SMAJ7.0CA-M3/5B, the SMB8J7.0CAHM3_B/I offers double the surge power rating and superior thermal dissipation - essential for AEC-Q101 deployment in harsh environments.
Availability
SMB8J7.0CAHM3_B/I is available at Aetrix Electronics and suitable for automotive camera systems, industrial CAN networks, infotainment USB ports, and smart sensor signal conditioning requiring stable component supply with full AEC-Q101 traceability.
Supply support for SMB8J7.0CAHM3_B/I 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMB8J7.0CAHM3_B/I belongs to Vishay's TRANSZORB® family of high-power TVS diodes, engineered specifically for automotive-grade transient immunity in safety-critical electronic subsystems.
FAQ
What is the clamping voltage of SMB8J7.0CAHM3_B/I at its rated peak pulse current?
The SMB8J7.0CAHM3_B/I has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak pulse current (IPPM) of 400 A under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry will not experience more than 12.0 V during such transient events - a critical parameter for safeguarding 5 V and 3.3 V ICs downstream of SMB8J7.0CAHM3_B/I.
Is SMB8J7.0CAHM3_B/I qualified for automotive applications?
Yes, SMB8J7.0CAHM3_B/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance. It is explicitly designated for automotive use per Vishay's ordering nomenclature and meets requirements for under-hood and cabin electronics subject to extended temperature cycling, humidity, and surge stress - making SMB8J7.0CAHM3_B/I suitable for ADAS, body control, and infotainment systems.
What does the "HM3" suffix mean in SMB8J7.0CAHM3_B/I?
The "HM3" suffix in SMB8J7.0CAHM3_B/I denotes halogen-free, RoHS-compliant construction meeting JESD201 Class 2 whisker resistance requirements. Unlike the "HE3" variant, HM3 ensures zero brominated flame retardants and satisfies stringent automotive material restrictions. The "B/I" indicates tape-and-reel packaging in 13-inch reels (3200 units), with "B" referencing the revision code per Vishay's documentation - all confirmed in Document Number 88422 for SMB8J7.0CAHM3_B/I.
How does SMB8J7.0CAHM3_B/I differ from unidirectional variants like SMB10J7.0A?
SMB8J7.0CAHM3_B/I is bidirectional with symmetrical clamping for both polarities, whereas SMB10J7.0A is unidirectional and requires correct cathode orientation. SMB8J7.0CAHM3_B/I has lower peak pulse power (800 W vs. 1000 W) and lower IPPM (400 A vs. 83.3 A) due to bidirectional design trade-offs, but offers polarity-agnostic installation - simplifying layout and eliminating risk of reverse mounting. Both share identical VWM (7.0 V) and VC (12.0 V), but SMB8J7.0CAHM3_B/I is specified for automotive use via HM3/AEC-Q101, unlike standard SMB10J7.0A.
What is the thermal resistance of SMB8J7.0CAHM3_B/I, and how does it affect layout?
SMB8J7.0CAHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per Vishay's datasheet Figure 5. To maintain safe junction temperatures below 150 °C during repeated surges, designers must provide adequate copper area and avoid excessive trace length - underscoring why SMB8J7.0CAHM3_B/I's thermal performance is tightly coupled to PCB layout, especially in automotive power rail applications.
SMB8J7.0CAHM3_B/I 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:
- 7V
- Current - Peak Pulse (10/1000µs):
- 66.7A
- Power - Peak Pulse:
- 800W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J7.0CAHM3_B/I FAQ
1.How can I place an order for SMB8J7.0CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.0CAHM3_B/I 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 SMB8J7.0CAHM3_B/I reliable?
The price and inventory of SMB8J7.0CAHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J7.0CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMB8J7.0CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.0CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.0CAHM3_B/I?
SMB8J7.0CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.0CAHM3_B/I 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 SMB8J7.0CAHM3_B/I?
For technical support, including SMB8J7.0CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.0CAHM3_B/I requirements.
6.How does Aetrix verify that SMB8J7.0CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMB8J7.0CAHM3_B/I 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 SMB8J7.0CAHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMB8J7.0CAHM3_B/I?
All SMB8J7.0CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.0CAHM3_B/I, 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 SMB8J7.0CAHM3_B/I part is unused and in its original packaging.
Return procedure for SMB8J7.0CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.0CAHM3_B/I Tags
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