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Vishay General Semiconductor - Diodes Division SMBJ17CAHM3_A/I
- Part No.:
- SMBJ17CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17CAHM3_A/I.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,190
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Product details
Overview
SMBJ17CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps transients to ≤27.6 V at 21.7 A peak current - deployed on signal lines and power rails in industrial sensor interfaces and automotive ECUs.
For engineers reviewing the SMBJ17CAHM3_A/I datasheet, SMBJ17CAHM3_A/I pinout, SMBJ17CAHM3_A/I application, or SMBJ17CAHM3_A/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker testing.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical VBR, IPPM, and VC specifications in forward and reverse directions. Its glass-passivated junction ensures stable clamping performance under repetitive surge stress, while the low incremental surge resistance enables rapid energy diversion during ESD or lightning-induced transients.
The device meets MSL Level 1 per J-STD-020 (peak reflow ≤260 °C), supports automated SMT placement, and is qualified to AEC-Q101 for automotive use - confirmed by HM3 suffix and ordering code "_A/I" denoting halogen-free, RoHS-compliant, AEC-Q101-qualified variant in 13″ tape-and-reel packaging.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping initiates; defines safe operating margin for 12 V nominal systems. |
| VBR (min/max) | 18.9 V / 20.9 V at IT = 1 mA - guaranteed breakdown threshold ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | ≤27.6 V at 21.7 A - clamping voltage limits downstream IC stress during 600 W transient surges (10/1000 µs waveform). |
| PPPM | 600 W - peak pulse power handling capacity determines survivability against IEC 61000-4-5 Level 4 surges. |
| RθJA | 100 °C/W - thermal resistance from junction to ambient dictates derating above 25 °C ambient for sustained reliability. |
| TJ max. | +150 °C - maximum junction temperature enables operation in under-hood automotive or high-temperature industrial enclosures. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per AEC standard. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no band marking required. |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; bidirectional symmetry eliminates orientation constraints during PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 600 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 surge immunity up to Level 4 (4 kV line-to-earth) in properly designed layouts. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces. |
| Halogen-free, RoHS-compliant | Meets environmental compliance requirements for global OEM supply chains and end-of-life recycling mandates. |
| MSL Level 1 (260 °C peak) | Allows standard lead-free reflow soldering without moisture sensitivity precautions or baking. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting analog output lines (e.g., 4–20 mA current loop) from inductive switching transients in factory automation PLCs. IC Role / Device Role: Bidirectional TVS placed across signal and return paths to clamp ±2 kV EFT bursts. Use Value: Prevents latch-up or damage to precision DACs and op-amps by limiting voltage excursion to ≤27.6 V during 21.7 A surges. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller GPIOs against load dump and jump-start transients in door module ECUs. IC Role / Device Role: Primary transient suppressor on 12 V supply rail and LIN signal line, rated for AEC-Q101 automotive stress profiles. Use Value: Ensures uninterrupted communication during 12 V system surges up to 600 W, maintaining functional safety integrity. |
| Telecom Power Input Stage | Consumer USB-C Port Protection |
Use Scenario: Front-end protection of 48 V PoE-powered equipment (e.g., IP cameras) against lightning-induced common-mode surges. IC Role / Device Role: Bidirectional TVS on DC input lines, coordinated with common-mode chokes and GDTs. Use Value: Clamps differential surges to <27.6 V while surviving repeated 600 W pulses, extending field lifetime in outdoor deployments. |
Use Scenario: Secondary-level overvoltage protection on USB-C VBUS and CC lines in portable chargers and docking stations. IC Role / Device Role: Fast-response TVS suppressing ESD (IEC 61000-4-2 ±15 kV air) and hot-swap transients on 5–20 V rails. Use Value: Limits voltage overshoot to safe levels for USB PD controllers and port multiplexers without sacrificing signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17CAHE3_A/I | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification. | Acceptable where halogen-free requirement is waived (e.g., non-automotive industrial designs). | Select when cost optimization is prioritized over halogen-free compliance. |
| SMAJ17CAHM3_A/I | Lower 400 W PPPM; SMA package (DO-214AC) with higher RθJA (140 °C/W); identical VWM/VBR. | Suitable only for lower-energy transients or space-constrained layouts where 600 W headroom is unnecessary. | Choose only if board area is critical and surge threat level is ≤400 W (e.g., consumer-grade peripherals). |
Compared with SMBJ17CAHE3_A/I, the SMBJ17CAHM3_A/I adds halogen-free compliance without trade-offs in clamping or surge rating; versus SMAJ17CAHM3_A/I, it delivers 50 % higher pulse power and superior thermal performance in the same footprint class - making it the preferred choice for automotive and industrial-grade robustness.
Availability
SMBJ17CAHM3_A/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom power input stages requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMBJ17CAHM3_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 diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMBJ series targets high-energy transient suppression in harsh environments - engineered for automotive, industrial, and telecom applications demanding AEC-Q101 qualification, 600 W surge capability, and consistent clamping performance.
FAQ
What does the "CA" suffix indicate in SMBJ17CAHM3_A/I?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ17CAHM3_A/I provides symmetrical transient suppression in both polarities - essential for protecting AC-coupled signals, floating buses, or dual-rail power domains without polarity-sensitive placement. This differs from unidirectional "A" variants that require correct cathode orientation.
Is SMBJ17CAHM3_A/I qualified for automotive use?
Yes, SMBJ17CAHM3_A/I is AEC-Q101 qualified, as confirmed by the "HM3" suffix (halogen-free, RoHS-compliant, AEC-Q101-qualified) and ordering code "_A/I". It has undergone stress testing for temperature cycling, high-temperature reverse bias, and ESD robustness per the AEC standard, making it suitable for under-hood and chassis-mounted automotive electronics.
What is the clamping voltage of SMBJ17CAHM3_A/I at its rated peak pulse current?
The clamping voltage (VC) of SMBJ17CAHM3_A/I is guaranteed ≤27.6 V at its peak pulse current (IPPM) of 21.7 A, measured using the standardized 10/1000 µs double-exponential waveform. This value defines the maximum voltage imposed on protected circuitry during a 600 W transient event.
How does the SMB (DO-214AA) package of SMBJ17CAHM3_A/I compare thermally to SMA (DO-214AC)?
The SMB package used in SMBJ17CAHM3_A/I offers lower thermal resistance than SMA: RθJA = 100 °C/W versus ~140 °C/W for SMAJ variants. This 40 % improvement allows SMBJ17CAHM3_A/I to sustain higher average power dissipation or operate reliably at elevated ambient temperatures without additional heatsinking.
Does SMBJ17CAHM3_A/I require special handling during PCB assembly?
No - SMBJ17CAHM3_A/I is rated MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. It can be processed using standard lead-free reflow profiles without pre-baking or moisture-sensitive handling, simplifying manufacturing for high-volume SMT lines.
SMBJ17CAHM3_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):
- 17V
- Voltage - Breakdown (Min):
- 18.9V
- Voltage - Clamping (Max) @ Ipp:
- 27.6V
- Current - Peak Pulse (10/1000µs):
- 21.7A
- Power - Peak Pulse:
- 600W
- 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)
SMBJ17CAHM3_A/I FAQ
1.How can I place an order for SMBJ17CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17CAHM3_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 SMBJ17CAHM3_A/I reliable?
The price and inventory of SMBJ17CAHM3_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 SMBJ17CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ17CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17CAHM3_A/I?
SMBJ17CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17CAHM3_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 SMBJ17CAHM3_A/I?
For technical support, including SMBJ17CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17CAHM3_A/I requirements.
6.How does Aetrix verify that SMBJ17CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ17CAHM3_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 SMBJ17CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ17CAHM3_A/I?
All SMBJ17CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17CAHM3_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 SMBJ17CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMBJ17CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17CAHM3_A/I Tags
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