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Vishay General Semiconductor - Diodes Division SMB8J17CAHM3_B/H
- Part No.:
- SMB8J17CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J17CAHM3_B/H.pdf
- Description:
- 800W,17V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,431
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Product details
Overview
SMB8J17CAHM3_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 17 V standoff voltage (VWM), 27.6 V clamping voltage (VC) at 29.0 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 SMB8J17CAHM3_B/H datasheet, SMB8J17CAHM3_B/H pinout, SMB8J17CAHM3_B/H application, or SMB8J17CAHM3_B/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM ≈ 1.62), MSL Level 1 moisture sensitivity, and halogen-free RoHS compliance per HM3 suffix.
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 lines without polarity constraints.
Rated for -55 °C to +150 °C junction temperature, it supports automotive-grade reliability with thermal resistance RθJL = 20 °C/W and RθJA = 72 °C/W on standard 0.2" × 0.2" copper pads - enabling robust operation under repeated surge stress per ISO 7637-2 and IEC 61000-4-5.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 18.9 V / 20.9 V at 1 mA - ensures reliable breakdown initiation within tight tolerance band |
| VC @ IPPM | 27.6 V at 29.0 A - limits downstream voltage stress during 10/1000 µs surge events |
| PPPM | 800 W - sustains high-energy transients common in automotive load-dump and inductive switching |
| ID @ VWM | 1.0 µA - ultra-low leakage preserves signal integrity in high-impedance sensor circuits |
| TJ max | +150 °C - supports under-hood and industrial ambient environments without derating |
| AEC-Q101 | Qualified - validated for automotive electronic modules per stress test requirements |
| Package | SMB (DO-214AA) - surface-mount footprint compatible with automated assembly and IPC-7351B land patterns |
Pinout & Package
Two-terminal SMB (DO-214AA) package with no polarity marking for bidirectional operation; cathode band absent per specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical electrical behavior in both directions - enables placement without orientation check |
| Case (cathode band omitted) | Thermal and mechanical interface | Exposed metal slug provides low-inductance path and enhances heat dissipation to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating signal lines without external polarity management |
| AEC-Q101 qualification | Validated for automotive electronics including engine control units, ADAS sensors, and body controllers |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive OEM material compliance requirements and supports lead-free reflow profiles up to 260 °C |
| MSL Level 1 rating | Zero floor life limitation - can be stored indefinitely before reflow without baking preconditioning |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes overvoltage exposure to protected ICs such as CAN transceivers or ADC front-ends |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) from load-dump and ESD in vehicle ECUs. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly at connector entry point to shunt surge energy before reaching MCU analog input or LIN transceiver. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V sensor signal chains while maintaining <1 µA leakage at 17 V standby. | Use Scenario: Safeguarding RS-485 transceivers and PLC digital inputs against lightning-induced surges on factory floor wiring. IC Role / Device Role / Timing Role: Bidirectional transient suppressor mounted across differential pair or between signal line and ground to clamp ±27.6 V peaks. Use Value: Sustains 800 W surge energy without degradation, preserving communication integrity during 10/1000 µs transients per IEC 61000-4-5 Level 4. |
| Consumer Power Adapter Input | Automotive Camera Module |
Use Scenario: Input-stage surge suppression for USB-C PD adapters exposed to mains-borne transients and hot-plug events. IC Role / Device Role / Timing Role: Primary clamping device on DC input rail upstream of buck controller, absorbing repetitive 100–200 A surges. Use Value: Withstands 100+ surge cycles at rated IPPM due to low thermal resistance (RθJL = 20 °C/W) and stable junction temperature rise. | Use Scenario: ESD and EOS protection for MIPI CSI-2 data lanes in rear-view or surround-view camera modules. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed adjacent to image sensor connector to suppress contact discharge up to ±15 kV (IEC 61000-4-2). Use Value: Maintains signal fidelity with <10 pF typical junction capacitance (per family data) and sub-1 ns response time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J17CAHE3_B/H | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs HM3) | Lacks halogen-free certification required by some Tier 1 automotive OEMs | Select HM3 when material compliance mandates halogen-free construction |
| SMAJ17CAHM3 | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher VC (33.2 V) | Insufficient for 800 W surge environments; limited thermal margin in high-power layouts | Choose only for space-constrained designs where peak power demand is ≤400 W |
Compared with SMB8J17CAHE3_B/H, the SMB8J17CAHM3_B/H adds halogen-free compliance without sacrificing performance; versus SMAJ17CAHM3, it delivers double the surge power handling and lower clamping voltage in a thermally superior SMB package - critical for automotive and industrial reliability.
Availability
SMB8J17CAHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O protection, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for SMB8J17CAHM3_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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability and application-specific optimization.
The SMB8JxxCA series targets high-reliability transient suppression in automotive and industrial systems, engineered to meet AEC-Q101 and deliver consistent clamping performance across temperature and surge repetition.
FAQ
What is the clamping voltage of SMB8J17CAHM3_B/H at its rated peak pulse current?
The SMB8J17CAHM3_B/H has a maximum clamping voltage (VC) of 27.6 V when subjected to its rated peak pulse current (IPPM) of 29.0 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for downstream circuitry such as microcontrollers or transceivers. The SMB8J17CAHM3_B/H maintains this clamping performance across its full operating temperature range.
Is SMB8J17CAHM3_B/H suitable for automotive applications?
Yes, SMB8J17CAHM3_B/H is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its halogen-free (HM3) construction, MSL Level 1 rating, and guaranteed operation from -55 °C to +150 °C meet stringent OEM requirements. The SMB8J17CAHM3_B/H also complies with ISO 7637-2 pulse test standards for load-dump and inductive switching immunity.
How does the bidirectional configuration of SMB8J17CAHM3_B/H affect PCB layout?
The SMB8J17CAHM3_B/H has no polarity marking and identical electrical behavior in both directions, eliminating orientation constraints during automated placement. This simplifies PCB layout by removing the need for silkscreen polarity indicators or directional routing checks. Engineers can place the SMB8J17CAHM3_B/H symmetrically across differential pairs or AC-coupled lines without functional impact - reducing assembly errors and design review cycles.
What is the standoff voltage (VWM) rating for SMB8J17CAHM3_B/H, and why is it important?
The SMB8J17CAHM3_B/H has a standoff voltage (VWM) of 17 V - the maximum continuous reverse voltage it can block without entering avalanche conduction. This parameter ensures compatibility with 12 V automotive systems and 15 V industrial rails while maintaining ultra-low leakage (<1.0 µA). Selecting a VWM correctly avoids false triggering during normal operation and maximizes noise margin before clamping activates.
Does SMB8J17CAHM3_B/H require special handling or baking before reflow soldering?
No, SMB8J17CAHM3_B/H is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and requires no dry-pack storage or pre-reflow baking. It withstands peak reflow temperatures up to 260 °C, making it compatible with standard lead-free soldering processes. This eliminates moisture sensitivity concerns and reduces manufacturing overhead compared to higher-MSL components - a key advantage for high-volume SMB8J17CAHM3_B/H deployment.
SMB8J17CAHM3_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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 29A
- 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)
SMB8J17CAHM3_B/H FAQ
1.How can I place an order for SMB8J17CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J17CAHM3_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 SMB8J17CAHM3_B/H reliable?
The price and inventory of SMB8J17CAHM3_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 SMB8J17CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMB8J17CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J17CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J17CAHM3_B/H?
SMB8J17CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J17CAHM3_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 SMB8J17CAHM3_B/H?
For technical support, including SMB8J17CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J17CAHM3_B/H requirements.
6.How does Aetrix verify that SMB8J17CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMB8J17CAHM3_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 SMB8J17CAHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMB8J17CAHM3_B/H?
All SMB8J17CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J17CAHM3_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 SMB8J17CAHM3_B/H part is unused and in its original packaging.
Return procedure for SMB8J17CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J17CAHM3_B/H Tags
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