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Vishay General Semiconductor - Diodes Division SMB8J7.0CAHE3_B/I
- Part No.:
- SMB8J7.0CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.0CAHE3_B/I.pdf
- Description:
- 800W,7.0V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,005
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Product details
Overview
SMB8J7.0CAHE3_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 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 SMB8J7.0CAHE3_B/I datasheet, SMB8J7.0CAHE3_B/I pinout, SMB8J7.0CAHE3_B/I application, or SMB8J7.0CAHE3_B/I equivalent, this device is selected for AEC-Q101-qualified bidirectional surge suppression where low clamping ratio, fast response (<1 ns), and MSL Level 1 reflow compatibility are critical in 12 V automotive subsystems and ruggedized industrial controllers.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) of 7.78–8.60 V at 10 mA test current and reverse leakage ≤1.0 µA at 7.0 V. Its junction capacitance is not specified in the datasheet, but thermal resistance is RθJA = 72 °C/W and RθJL = 20 °C/W, enabling reliable operation up to TJ = +150 °C.
The device uses glass-passivated silicon junction technology and meets J-STD-020 MSL Level 1 (260 °C peak reflow). It is AEC-Q101 qualified and RoHS-compliant, with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, and whisker-tested per JESD 201 Class 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - maximum continuous reverse working voltage before clamping begins; sets operating margin for 12 V nominal systems. |
| VBR min/max | 7.78 V / 8.60 V at IT = 10 mA - defines tight breakdown tolerance for predictable turn-on during transients. |
| VC @ IPPM | 12.0 V at IPPM = 400 A (10/1000 µs) - clamping voltage limits downstream IC stress during 800 W surge events. |
| PPPM | 800 W - peak pulse power rating under standardized 10/1000 µs waveform; validates robustness against ISO 7637-2 Pulse 1/2a/5a. |
| ID @ VWM | ≤1.0 µA - ultra-low leakage preserves signal integrity and battery life in always-on automotive modules. |
| TJ max | +150 °C - enables deployment in under-hood ECUs and motor control units without derating concerns. |
| Package | SMB (DO-214AA) - surface-mount footprint (5.59 mm × 3.94 mm) compatible with automated placement and IPC-7351B land patterns. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional configuration (no cathode band).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | Both terminals function identically; no polarity orientation required during PCB layout - simplifies routing and reduces assembly errors. |
| Case (body) | Thermal and mechanical interface | Plastic body provides UL 94 V-0 flammability rating; copper pad mounting (0.2" × 0.2") required to achieve rated PPPM and thermal performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - supports ASIL-B system integration without additional qualification effort. |
| MSL Level 1 rating | Enables single-pass 260 °C lead-free reflow without moisture sensitivity concerns - eliminates bake requirements and streamlines SMT production. |
| Glass-passivated junction | Ensures stable VBR and low leakage over lifetime; resists humidity-induced parameter drift in harsh under-hood environments. |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes voltage overshoot during surges - protects 5 V and 3.3 V logic interfaces downstream of 12 V supply rails. |
| 800 W peak pulse power | Withstands repetitive ISO 16750-2 load dump surges up to 35 V for 400 ms and ISO 7637-2 Pulse 5a (100 V, 400 ms) when properly heatsinked. |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Transceiver Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN physical layer transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump, jump-start, and inductive switching transients in engine control modules. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and ground, responding within <1 ns to limit voltage excursion below IC absolute maximum ratings. Use Value: Prevents latch-up or permanent damage to transceivers such as TJA1042 or MCP2561 during ISO 7637-2 Pulse 1 (−150 V, 50 Ω, 2 Ω series) events. |
Use Scenario: Safeguarding CAN FD transceivers on 24 V industrial PLC backplanes exposed to relay coil flyback and EFT bursts in factory automation cabinets. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp shunting surge energy away from CANH/CANL differential pair while maintaining signal integrity at 5 Mbps. Use Value: Maintains bus uptime by limiting common-mode voltage spikes to <12.0 V, preventing false dominant states and bit errors during 4 kV EFT (IEC 61000-4-4) events. |
| Power Supply Input Stage Clamping | USB Type-C Port ESD/Surge Protection |
|
Use Scenario: Secondary-level surge suppression on 12 V input rails feeding DC/DC converters in telematics control units (TCUs) and ADAS domain controllers. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing bulk energy from ISO 16750-2 Pulse 4 (load dump) before it reaches upstream PMICs like TPS65381A-Q1. Use Value: Reduces required input capacitor derating and eliminates need for series fuses or active crowbar circuits - lowering BOM cost and board area. |
Use Scenario: Front-end protection for USB Type-C receptacles in infotainment head units subjected to hot-plug ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional clamp across VBUS and GND, activated only during >±12 V transients to avoid interfering with 5 V/9 V/15 V PD negotiation. Use Value: Achieves IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) compliance without degrading USB 2.0 signal rise time due to absence of parasitic capacitance specification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J7.0CAHM3_B/I | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and marking code. | No functional difference; selected only when halogen-free material compliance is mandated by OEM Tier 1 procurement policy. | Choose SMB8J7.0CAHE3_B/I for standard RoHS compliance; choose SMB8J7.0CAHM3_B/I if JESC-001 or IEC 61249-2-21 halogen-free certification is contractually required. |
| SMAJ7.0CA-E3/52 | Lower PPPM (400 W), higher VC (12.5 V at 32 A), SMA package (smaller footprint, lower thermal mass), non-AEC-Q101. | Suitable for cost-sensitive consumer or industrial applications where automotive qualification and 800 W surge immunity are not required. | Select SMB8J7.0CAHE3_B/I when AEC-Q101, 800 W rating, or SMB mechanical robustness are mandatory; SMAJ7.0CA-E3/52 fits space-constrained non-automotive designs. |
Compared with SMB8J7.0CAHM3_B/I, SMB8J7.0CAHE3_B/I offers identical surge performance with standard RoHS compliance; versus SMAJ7.0CA-E3/52, it delivers double the peak power handling and automotive qualification - critical for safety-critical 12 V rail protection where failure modes must be rigorously controlled.
Availability
SMB8J7.0CAHE3_B/I is available at Aetrix Electronics and suitable for automotive electronics, industrial I/O modules, and telecom power supply protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMB8J7.0CAHE3_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 SMB8Jx.xCA series targets AEC-Q101-compliant transient suppression in automotive and industrial environments, delivering high-power-density TVS protection in compact surface-mount packages for harsh-condition signal and power line hardening.
FAQ
What is the clamping voltage of SMB8J7.0CAHE3_B/I at its rated peak pulse current?
The SMB8J7.0CAHE3_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 standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream circuitry remains within safe operating voltage limits during surge events - a key parameter verified in Vishay's Document Number 88422, page 3.
Is SMB8J7.0CAHE3_B/I suitable for automotive applications?
Yes, SMB8J7.0CAHE3_B/I is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix indicating RoHS-compliant and AEC-Q101-qualified construction. It meets requirements for under-hood and cabin modules, including thermal cycling, humidity testing, and surge immunity - confirmed in Vishay's revision 09-Jan-2024 datasheet, section "MECHANICAL DATA" and ordering information table.
What does the "B/I" suffix mean in SMB8J7.0CAHE3_B/I?
The "B/I" suffix in SMB8J7.0CAHE3_B/I denotes packaging configuration: "B" indicates tape-and-reel packaging per Vishay's internal revision coding, and "I" specifies 13-inch diameter reels containing 3200 units. This matches the ordering example shown in Document Number 88422, page 3, under "ORDERING INFORMATION" - distinct from "B/H" (7-inch reels, 750 units).
How does SMB8J7.0CAHE3_B/I differ from unidirectional variants like SMB10J7.0AHE3_B/I?
SMB8J7.0CAHE3_B/I is bidirectional with symmetrical clamping behavior across both polarities and no cathode marking, whereas SMB10J7.0AHE3_B/I is unidirectional (cathode-banded), rated for 1000 W PPPM and 100 A IFSM. The "8" prefix indicates 800 W bidirectional rating; "10" denotes 1000 W unidirectional. Both share VWM = 7.0 V and VC = 12.0 V, but differ in surge capability, polarity, and application scope - per datasheet pages 2–3.
What is the thermal resistance of SMB8J7.0CAHE3_B/I, and how does it affect layout?
SMB8J7.0CAHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W and junction-to-lead (RθJL) of 20 °C/W, measured on 0.2" × 0.2" copper pads per terminal. To achieve rated PPPM and avoid thermal runaway, PCB layout must use minimum recommended pad dimensions (0.220" × 0.096") and avoid excessive trace length - details provided in the "MECHANICAL DATA" section of Vishay Document Number 88422.
SMB8J7.0CAHE3_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)
SMB8J7.0CAHE3_B/I FAQ
1.How can I place an order for SMB8J7.0CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.0CAHE3_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 SMB8J7.0CAHE3_B/I reliable?
The price and inventory of SMB8J7.0CAHE3_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 SMB8J7.0CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMB8J7.0CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.0CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.0CAHE3_B/I?
SMB8J7.0CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.0CAHE3_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 SMB8J7.0CAHE3_B/I?
For technical support, including SMB8J7.0CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.0CAHE3_B/I requirements.
6.How does Aetrix verify that SMB8J7.0CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMB8J7.0CAHE3_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 SMB8J7.0CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMB8J7.0CAHE3_B/I?
All SMB8J7.0CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.0CAHE3_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 SMB8J7.0CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMB8J7.0CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.0CAHE3_B/I Tags
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