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Vishay General Semiconductor - Diodes Division SMB8J7.0CAHE3_A/I
- Part No.:
- SMB8J7.0CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.0CAHE3_A/I.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMB8J7.0CAHE3_A/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 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 sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J7.0CAHE3_A/I datasheet, SMB8J7.0CAHE3_A/I pinout, SMB8J7.0CAHE3_A/I application, or SMB8J7.0CAHE3_A/I equivalent, key selection criteria include AEC-Q101 qualification, bidirectional clamping symmetry, low clamping ratio (VC/VWM = 1.71), and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its bidirectional architecture enables symmetric suppression of positive and negative polarity surges without external polarity management.
Rated for -55 °C to +150 °C operating junction temperature and qualified to AEC-Q101, SMB8J7.0CAHE3_A/I supports automotive-grade reliability under repeated surge stress. Thermal resistance is characterized at RθJL = 20 °C/W (junction-to-lead), enabling effective heat dissipation through PCB copper pads per recommended layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 7.0 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 7.78–8.60 V at 10 mA - Confirmed breakdown range ensures reliable triggering above VWM with controlled tolerance. |
| VC (Clamping Voltage) | 12.0 V at IPPM = 400 A - Peak voltage seen by protected circuit during worst-case 10/1000 µs surge; critical for IC survivability. |
| PPPM (Peak Pulse Power) | 800 W - Sustained energy-handling capability under standardized 10/1000 µs waveform; validates robustness against ISO 7637-2 Pulse 1/2/5a. |
| ID (Reverse Leakage) | 1.0 µA max at VWM - Ultra-low leakage preserves signal integrity and minimizes standby power loss in high-impedance nodes. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and industrial enclosures without derating. |
| Package | SMB (DO-214AA) - Surface-mount footprint (4.57 mm × 3.94 mm) compatible with standard reflow profiles and J-STD-020 MSL level 1. |
Pinout & Package
SMB8J7.0CAHE3_A/I uses the SMB (DO-214AA) surface-mount package: 2-terminal, non-polarized bidirectional configuration with no cathode marking. The case is molded with UL 94 V-0 compliant compound; terminals are matte tin-plated for solderability per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (Bidirectional) | Surge current path (symmetrical) | Either terminal serves as anode or cathode depending on transient polarity; no polarity-dependent routing required. |
| Case (Cathode Band Absent) | Thermal and mechanical anchor | No color band or marking; thermal path relies on soldered leads to PCB copper pads (min. 5.0 mm × 5.0 mm per terminal). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and ADAS sensor interfaces with zero defects in accelerated lifetime testing. |
| Glass-passivated junction | Ensures stable VBR and VC over 1000+ surge cycles; eliminates parameter drift due to moisture or contamination ingress. |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes overvoltage stress on downstream ICs - e.g., protects 3.3 V or 5 V logic inputs during 12 V automotive load dump events. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking; supports high-volume automated assembly without moisture sensitivity concerns. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets EU Directive 2011/65/EU and JEDEC J-STD-20E; eliminates brominated flame retardants while maintaining UL 94 V-0 flammability. |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Transceiver Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN physical layer transceivers from ESD (IEC 61000-4-2) and load-dump transients (ISO 7637-2 Pulse 5a) in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential bus lines (CAN_H/CAN_L) to clamp common-mode surges without disrupting signal integrity. Use Value: Maintains <12.0 V clamping during 400 A surge, preventing transceiver latch-up or damage while preserving bit-rate timing up to 1 Mbps. |
Use Scenario: Safeguarding RS-485/RS-422 communication ports in PLC backplanes and motor drives exposed to inductive switching noise. IC Role / Device Role / Timing Role: Placed between data lines and ground to shunt fast-rising transients (<1 ns rise time) while adding <1 pF junction capacitance. Use Value: Limits voltage overshoot to ≤12.0 V during 1 kV/500 A surge, ensuring error-free data transmission without signal edge distortion. |
| Consumer USB Port ESD Protection | Power Supply Input Surge Suppression |
|
Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D- lines in automotive infotainment head units subjected to human-body-model discharges. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp parallel to data lines, activated only during >7.78 V transients. Use Value: Delivers <1.0 µA leakage at 7.0 V, avoiding signal attenuation; clamps 8 kV HBM ESD events within 12.0 V envelope. |
Use Scenario: Front-end surge suppression on 12 V DC input rails of industrial gateways and telematics control units. IC Role / Device Role / Timing Role: Primary TVS stage absorbing bulk surge energy before downstream DC-DC converters and LDOs. Use Value: Handles 800 W peak pulse power (10/1000 µs), diverting >95% of surge current away from sensitive regulators during load dump. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J7.0CAHM3_A/I | Identical electrical specs; halogen-free molding compound instead of standard RoHS-compliant compound. | Required for strict halogen-free compliance programs (e.g., JESC G-0002); same AEC-Q101 qualification and thermal performance. | Select when environmental compliance mandates absence of chlorine/bromine compounds, with no trade-off in surge capability. |
| SMBJ7.0CAHE3_A/I | Same VWM (7.0 V), VC (12.0 V), and VBR range, but rated for 600 W PPPM (vs. 800 W) and 300 A IPPM (vs. 400 A). | Lower surge rating suits cost-sensitive consumer applications where ISO 7637-2 Pulse 5a immunity is not required. | Choose for non-automotive designs needing reduced surge margin; verify system-level transient test compliance before substitution. |
Compared with SMB8J7.0CAHE3_A/I, SMB8J7.0CAHM3_A/I offers identical protection performance with enhanced material compliance, while SMBJ7.0CAHE3_A/I provides lower-cost, lower-surge-capability alternative for non-automotive use cases - neither is pin-compatible due to differing surge ratings and qualification scope.
Availability
SMB8J7.0CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer USB port protection, and 12 V DC power supply surge suppression requiring stable component supply and AEC-Q101 traceability.
Supply support for SMB8J7.0CAHE3_A/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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
SMB8J7.0CAHE3_A/I belongs to Vishay's TRANSZORB® family of high-power-density TVS diodes, engineered specifically for AEC-Q101-compliant surge protection in harsh electromagnetic environments.
FAQ
What is the clamping voltage of SMB8J7.0CAHE3_A/I at its rated peak pulse current?
The SMB8J7.0CAHE3_A/I has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak pulse current (IPPM) of 400 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and confirmed in Vishay's Document Number 88422, ensuring predictable overvoltage limiting for protected circuits. The SMB8J7.0CAHE3_A/I maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMB8J7.0CAHE3_A/I qualified for automotive applications?
Yes, SMB8J7.0CAHE3_A/I is explicitly AEC-Q101 qualified, as indicated by the "HE3" suffix and documented in Vishay's official datasheet (Rev. 09-Jan-2024, Doc. No. 88422). This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD robustness - validating its use in engine control units, ADAS sensors, and body electronics. The SMB8J7.0CAHE3_A/I meets all requirements for automotive-grade reliability without derating.
What does the "A/I" suffix mean in SMB8J7.0CAHE3_A/I?
The "A/I" suffix in SMB8J7.0CAHE3_A/I denotes packaging configuration: "A" indicates the part is supplied on 13-inch diameter plastic tape and reel, and "I" specifies a base quantity of 3200 units per reel. This matches Vishay's ordering convention in Document Number 88422, where "/I" corresponds to large-volume SMT-ready packaging - distinct from "/H" (7-inch reel, 750 units). The SMB8J7.0CAHE3_A/I is fully compatible with standard pick-and-place equipment.
How does SMB8J7.0CAHE3_A/I differ from unidirectional variants like SMB10J7.0AHE3_A/I?
SMB8J7.0CAHE3_A/I is bidirectional with symmetrical clamping for both polarities, whereas SMB10J7.0AHE3_A/I is unidirectional and conducts only in reverse bias. The SMB8J7.0CAHE3_A/I has lower peak pulse power (800 W vs. 1000 W) and lower peak pulse current (400 A vs. 83.3 A) due to its bidirectional structure - but offers polarity-agnostic placement and eliminates need for orientation verification during assembly. Both share identical VWM (7.0 V) and VC (12.0 V).
What is the thermal resistance specification for SMB8J7.0CAHE3_A/I?
SMB8J7.0CAHE3_A/I has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W, as specified in Vishay's Document Number 88422. This value assumes mounting on minimum recommended 5.0 mm × 5.0 mm copper pads per terminal. Unlike RθJA (72 °C/W), RθJL reflects direct conduction path to PCB copper - making it the relevant metric for surge-duty thermal design. The SMB8J7.0CAHE3_A/I leverages this low RθJL to sustain repetitive surges without exceeding TJ max of +150 °C.
SMB8J7.0CAHE3_A/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:
- Obsolete
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J7.0CAHE3_A/I FAQ
1.How can I place an order for SMB8J7.0CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.0CAHE3_A/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 SMB8J7.0CAHE3_A/I reliable?
The price and inventory of SMB8J7.0CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J7.0CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J7.0CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.0CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.0CAHE3_A/I?
SMB8J7.0CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.0CAHE3_A/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 SMB8J7.0CAHE3_A/I?
For technical support, including SMB8J7.0CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.0CAHE3_A/I requirements.
6.How does Aetrix verify that SMB8J7.0CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J7.0CAHE3_A/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 SMB8J7.0CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J7.0CAHE3_A/I?
All SMB8J7.0CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.0CAHE3_A/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 SMB8J7.0CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMB8J7.0CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.0CAHE3_A/I Tags
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