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Vishay General Semiconductor - Diodes Division SMB8J7.0CAHM3/H
- Part No.:
- SMB8J7.0CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.0CAHM3/H.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,908
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Product details
Overview
SMB8J7.0CAHM3/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/H datasheet, SMB8J7.0CAHM3/H pinout, SMB8J7.0CAHM3/H application, or SMB8J7.0CAHM3/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance (HM3 suffix), and compatibility with automated SMT placement 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 symmetry enables protection of AC-coupled or differential signal paths without polarity constraints.
Rated for -55 °C to +150 °C operating junction temperature and qualified to AEC-Q101, SMB8J7.0CAHM3/H supports automotive-grade reliability under repeated surge stress. Thermal resistance is 72 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling effective power dissipation in compact PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 5 V–7 V signal/power rails. |
| VBR (min/max) | 7.78 V / 8.60 V at 10 mA test current - breakdown threshold range ensures consistent turn-on across production lots. |
| VC @ IPPM | 12.0 V at 400 A - clamping voltage limits downstream IC stress during 800 W transient events (10/1000 µs). |
| PPPM | 800 W - peak pulse power rating determines survivability against lightning-induced surges per IEC 61000-4-5. |
| IPPM | 400 A - peak pulse current capacity supports robust protection for CAN, LIN, and sensor supply lines. |
| TJ max | +150 °C - enables operation in under-hood automotive environments and high-temperature industrial enclosures. |
| 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
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 transient conduction path | Either terminal serves as anode or cathode depending on transient polarity; no DC bias dependency. |
| Case (body) | Thermal and mechanical anchor | Non-electrical; provides thermal path to PCB copper pads (0.2" × 0.2") and mechanical stability during board flex. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive environmental standards and enables use in green manufacturing without compromising surge performance. |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| Low clamping ratio (VC/VWM = 1.71) | Minimizes overvoltage stress on protected ICs compared to alternatives with higher ratios (>1.8). |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without moisture-induced popcorning, eliminating pre-bake requirements. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure, temperature, and position sensors in engine control modules. IC Role / Device Role / Timing Role: Bidirectional TVS clamp absorbing load-dump and ISO 7637-2 pulse 1/2a/5a transients. Use Value: Prevents latch-up or permanent damage to 12-bit ADC front-ends by limiting voltage to ≤12.0 V during 400 A surges. |
Use Scenario: Shielding RS-485/RS-422 transceiver data lines in factory automation PLCs. IC Role / Device Role / Timing Role: Fast-response surge suppression on differential bus lines exposed to ESD and inductive switching noise. Use Value: Maintains signal integrity under IEC 61000-4-4 EFT (4 kV) and IEC 61000-4-5 surge (1 kV line-earth) tests. |
| Consumer Power Adapter Input | Telecom Line Card Protection |
|
Use Scenario: Input-stage protection for 5 V/9 V USB-C PD adapters against AC line surges and hot-plug transients. IC Role / Device Role / Timing Role: Primary-side clamping device placed between bridge rectifier and bulk capacitor. Use Value: Absorbs 800 W energy without degradation, extending adapter lifetime in regions with unstable mains supply. |
Use Scenario: Overvoltage safeguard on POTS (Plain Old Telephone Service) line interface circuits in VoIP gateways. IC Role / Device Role / Timing Role: Bidirectional shunt protector on tip/ring pair handling ringing voltage (−48 V DC + 90 V AC). Use Value: Clamps induced lightning surges to <12.0 V while maintaining low leakage (<1.0 µA at 7.0 V) for standby power efficiency. |
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/H | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs HM3). | Lacks halogen-free certification required for Tier 1 automotive sourcing. | Select when halogen content is not regulated in target market or application. |
| SMAJ7.0CA | Lower PPPM (400 W), smaller SMA package (DO-214AC), VC = 12.0 V at 200 A. | Insufficient for 800 W surge requirements; limited to lower-energy consumer interfaces. | Choose only for space-constrained non-automotive designs where 400 W rating suffices. |
Compared with SMB8J7.0CAHM3/H, SMB8J7.0CAHE3/H offers identical surge performance but lacks halogen-free compliance, while SMAJ7.0CA trades 50 % peak power and automotive qualification for reduced footprint - making SMB8J7.0CAHM3/H the sole option meeting AEC-Q101 + 800 W + HM3 in SMB package.
Availability
SMB8J7.0CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, and telecom line card designs requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMB8J7.0CAHM3/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.
SMB8J7.0CAHM3/H 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 SMB8J7.0CAHM3/H at its rated peak pulse current?
The SMB8J7.0CAHM3/H has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated peak pulse current of 400 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for protected circuitry downstream of SMB8J7.0CAHM3/H.
Is SMB8J7.0CAHM3/H suitable for automotive applications?
Yes, SMB8J7.0CAHM3/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction - meeting Tier 1 automotive supplier requirements for engine control units, body control modules, and ADAS sensor interfaces. Its -55 °C to +150 °C operating range further validates suitability for under-hood deployment.
How does the bidirectional configuration of SMB8J7.0CAHM3/H affect its circuit implementation?
The bidirectional nature of SMB8J7.0CAHM3/H means it conducts symmetrically for both positive and negative transients, requiring no polarity orientation during placement. This simplifies layout on AC-coupled lines like CAN bus, audio inputs, or telecom tip/ring pairs - unlike unidirectional TVS diodes that mandate strict cathode alignment relative to system ground.
What is the thermal resistance of SMB8J7.0CAHM3/H, and how does it impact PCB layout?
SMB8J7.0CAHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W and junction-to-lead (RθJL) of 20 °C/W. To maintain safe junction temperatures during repetitive surges, the datasheet specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - a requirement directly tied to achieving those Rθ values in SMB8J7.0CAHM3/H designs.
Does SMB8J7.0CAHM3/H require special handling or baking prior to reflow soldering?
No, SMB8J7.0CAHM3/H is rated MSL Level 1 per J-STD-020 with a maximum peak reflow temperature of 260 °C, meaning it can be placed directly into lead-free reflow ovens without moisture sensitivity precautions or pre-bake cycles - streamlining SMT assembly for SMB8J7.0CAHM3/H in high-volume production.
SMB8J7.0CAHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 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/H FAQ
1.How can I place an order for SMB8J7.0CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.0CAHM3/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/H reliable?
The price and inventory of SMB8J7.0CAHM3/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/H is usually 5 days.
3.What payment methods are accepted for SMB8J7.0CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.0CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.0CAHM3/H?
SMB8J7.0CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.0CAHM3/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/H?
For technical support, including SMB8J7.0CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.0CAHM3/H requirements.
6.How does Aetrix verify that SMB8J7.0CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMB8J7.0CAHM3/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/H meets industry standards.
7.What is the process for return or replacement of SMB8J7.0CAHM3/H?
All SMB8J7.0CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.0CAHM3/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/H part is unused and in its original packaging.
Return procedure for SMB8J7.0CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.0CAHM3/H Tags
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