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Vishay General Semiconductor - Diodes Division SMB8J7.0CAHM3_B/H
- Part No.:
- SMB8J7.0CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.0CAHM3_B/H.pdf
- Description:
- 800W,7.0V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,768
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Product details
Overview
SMB8J7.0CAHM3_B/H 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 - suitable for automotive sensor interface and industrial I/O line protection.
For engineers reviewing the SMB8J7.0CAHM3_B/H datasheet, SMB8J7.0CAHM3_B/H pinout, SMB8J7.0CAHM3_B/H application, or SMB8J7.0CAHM3_B/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, low thermal resistance (RθJL = 20 °C/W), and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector, responding within picoseconds to transients exceeding its 7.0 V stand-off threshold. Its glass-passivated junction ensures stable breakdown behavior across temperature (-55 °C to +150 °C), while the bidirectional architecture enables symmetric suppression of positive and negative polarity surges without external polarity management.
The SMB8J7.0CAHM3_B/H delivers 800 W peak pulse power handling under standardized 10/1000 µs waveform conditions, with clamping voltage tightly controlled at ≤12.0 V up to 400 A. Its MSL Level 1 rating and 260 °C lead-free reflow compatibility support robust manufacturing integration in automotive-grade production environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range for protected lines. |
| VBR (min/max) | 7.78 V / 8.60 V at 10 mA - Confirmed breakdown threshold window ensures reliable triggering without premature conduction. |
| VC @ IPPM | 12.0 V at 400 A - Clamping voltage limits downstream IC stress during 800 W transient events; critical for 3.3 V/5 V logic protection. |
| PPPM | 800 W - Peak pulse power rating per 10/1000 µs waveform; determines survivability against ISO 7637-2 Pulse 1/2/5a/b surges. |
| IPPM | 400 A - Peak surge current capacity; validates protection margin for 12 V automotive supply line transients. |
| TJ max. | +150 °C - Maximum junction temperature supports operation in under-hood automotive environments and industrial enclosures. |
| RθJL | 20 °C/W - Low junction-to-lead thermal resistance enables efficient heat transfer to PCB copper, sustaining repetitive surge duty cycles. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | No designated anode/cathode; terminals are interchangeable - enables single-component protection of AC-coupled or differential signal lines. |
| Case (body) | Thermal conduction path | Plastic body transfers heat to PCB copper pads; requires minimum 5.0 mm × 5.0 mm pad area per terminal per datasheet fig. 2. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, ADAS sensors, and infotainment interfaces per stress test requirements. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets automotive environmental standards (e.g., ELV, REACH) and enables use in green manufacturing programs without material waivers. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage performance across 1000+ thermal cycles and humidity exposure. |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow assembly without moisture-induced popcorning or parameter shift. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD, load dump), improving protection margin for sensitive CMOS inputs. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and inductive switching transients in 12 V vehicle systems. IC Role / Device Role: Bidirectional shunt clamp placed between signal line and ground, absorbing energy before it reaches the sensor ASIC or microcontroller input. Use Value: Maintains signal integrity below 12.0 V clamping threshold during 400 A surges, preventing latch-up or damage to 5 V tolerant inputs per ISO 16750-2. |
Use Scenario: Safeguarding PLC digital input modules against field-wiring induced surges from solenoid coils, relay contacts, and motor drives. IC Role / Device Role: Primary overvoltage clamp on 24 V DC input channels, coordinated with series impedance to limit let-through energy. Use Value: Enables robust 800 W transient handling without derating at +85 °C ambient, supporting Class I, Division 2 hazardous location compliance. |
| USB 2.0 Data Line Protection | DC Power Rail Clamp |
|
Use Scenario: ESD and cable discharge protection for USB 2.0 D+/D− lines in automotive infotainment head units and industrial HMIs. IC Role / Device Role: Low-capacitance bidirectional TVS placed directly at connector, shunting ±15 kV contact ESD per IEC 61000-4-2. Use Value: Delivers sub-12 V clamping with <100 ps response, preserving signal rise/fall times while meeting USB eye diagram mask requirements. |
Use Scenario: Secondary surge suppression on 5 V or 3.3 V DC power rails feeding FPGA, MCU, or PMIC subsystems. IC Role / Device Role: Fast-reacting parallel clamp activated only during overvoltage events, minimizing standby power loss and thermal load. Use Value: Limits rail excursions to ≤12.0 V during 100 ns–1 ms transients, preventing brownout resets and internal LDO overvoltage failure. |
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/H | Same electrical specs, but RoHS-compliant commercial grade (non-halogen-free); lacks halogen-free certification. | Approved for non-automotive industrial and consumer applications where halogen-free materials are not mandated. | Select when cost sensitivity outweighs halogen-free requirement and AEC-Q101 is not needed. |
| SMBJ7.0CAHM3 | Same SMB package and 7.0 V VWM, but rated for 600 W PPPM (vs. 800 W) and 300 A IPPM. | Suitable for lower-energy surge environments (e.g., consumer electronics), not validated for automotive load dump. | Choose only if system-level testing confirms 600 W rating suffices; not drop-in for AEC-Q101 or 800 W requirements. |
Compared with SMB8J7.0CAHE3_B/H, the SMB8J7.0CAHM3_B/H adds halogen-free compliance and AEC-Q101 qualification without sacrificing electrical performance; versus SMBJ7.0CAHM3, it provides 33 % higher surge power margin and automotive validation - critical for safety-critical 12 V systems.
Availability
SMB8J7.0CAHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, USB 2.0 data line protection, and DC power rail clamping requiring stable component supply across extended product lifecycles.
Supply support for SMB8J7.0CAHM3_B/H 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, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMB8JxxCA series targets AEC-Q101-compliant transient suppression in harsh environments, emphasizing robustness, repeatable clamping, and seamless SMT integration for next-generation vehicle electronics and ruggedized controls.
FAQ
What is the clamping voltage of SMB8J7.0CAHM3_B/H at its rated peak pulse current?
The SMB8J7.0CAHM3_B/H has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated 400 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured and guaranteed per Vishay Document Number 88422, ensuring predictable overvoltage limiting for downstream 3.3 V or 5 V circuitry. The SMB8J7.0CAHM3_B/H maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is SMB8J7.0CAHM3_B/H suitable for automotive applications?
Yes, SMB8J7.0CAHM3_B/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction - making it approved for automotive use in engine control, body electronics, and ADAS sensor interfaces. Its 800 W peak pulse power rating and 12.0 V clamping voltage meet ISO 7637-2 and ISO 16750-2 surge immunity requirements. The SMB8J7.0CAHM3_B/H is specifically designed for under-hood and cabin environments where reliability under thermal cycling and vibration is essential.
What does the "HM3" suffix indicate in SMB8J7.0CAHM3_B/H?
The "HM3" suffix in SMB8J7.0CAHM3_B/H denotes halogen-free, RoHS-compliant construction per Vishay's material categorization standard (Document 99912), with whisker resistance certified to JESD 201 Class 2. It distinguishes this variant from the "HE3" (RoHS-compliant but not halogen-free) and "E3/M3" (commercial-grade) versions. The SMB8J7.0CAHM3_B/H meets automotive environmental mandates including ELV and supports green manufacturing initiatives without compromising electrical or thermal performance.
How does SMB8J7.0CAHM3_B/H differ from unidirectional variants like SMB10J7.0A?
The SMB8J7.0CAHM3_B/H is bidirectional with symmetrical clamping for AC or differential signals, whereas SMB10J7.0A is unidirectional and requires correct polarity orientation. SMB8J7.0CAHM3_B/H offers 800 W PPPM and 400 A IPPM, while SMB10J7.0A delivers 1000 W and 200 A - reflecting different surge energy priorities. Both share the SMB package, but the SMB8J7.0CAHM3_B/H is AEC-Q101 qualified and halogen-free, unlike most SMB10J7.0A variants. Their VWM and VC values are matched for direct functional comparison.
What PCB layout guidance applies to SMB8J7.0CAHM3_B/H for optimal thermal and surge performance?
Vishay specifies mounting SMB8J7.0CAHM3_B/H on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 800 W pulse power and maintain RθJA = 72 °C/W. Thermal vias under pads are recommended for high-duty-cycle applications. The SMB8J7.0CAHM3_B/H requires no polarity alignment due to its bidirectional design, simplifying layout and reducing placement errors in automated assembly. Pad dimensions must follow DO-214AA outline per datasheet page 5.
SMB8J7.0CAHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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/H FAQ
1.How can I place an order for SMB8J7.0CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.0CAHM3_B/H 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/H reliable?
The price and inventory of SMB8J7.0CAHM3_B/H 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/H is usually 5 days.
3.What payment methods are accepted for SMB8J7.0CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.0CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.0CAHM3_B/H?
SMB8J7.0CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.0CAHM3_B/H 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/H?
For technical support, including SMB8J7.0CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.0CAHM3_B/H requirements.
6.How does Aetrix verify that SMB8J7.0CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMB8J7.0CAHM3_B/H 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/H meets industry standards.
7.What is the process for return or replacement of SMB8J7.0CAHM3_B/H?
All SMB8J7.0CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.0CAHM3_B/H, 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/H part is unused and in its original packaging.
Return procedure for SMB8J7.0CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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