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Vishay General Semiconductor - Diodes Division SMBJ17CAHM3/I
- Part No.:
- SMBJ17CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17CAHM3/I.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,372
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Product details
Overview
SMBJ17CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown range (VBR at 1 mA), 600 W peak pulse power (10/1000 µs), and clamps to ≤27.6 V at 21.7 A peak surge current - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ17CAHM3/I datasheet, SMBJ17CAHM3/I pinout, SMBJ17CAHM3/I application, or SMBJ17CAHM3/I equivalent, this device serves as a halogen-free, RoHS-compliant, AEC-Q101-qualified TVS for bidirectional overvoltage protection where low clamping voltage, fast response (<1 ns), and MSL Level 1 reflow compatibility are critical selection criteria.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction enables stable breakdown behavior and low incremental surge resistance, while the SMB package supports automated placement and meets UL 94 V-0 flammability rating.
The device is rated for -55 °C to +150 °C operating junction temperature, exhibits 0.090 %/°C temperature coefficient of VBR, and delivers 27.6 V clamping voltage at 21.7 A IPPM under standardized 10/1000 µs waveform - ensuring predictable transient suppression without latch-up or degradation under repetitive surges at 0.01 % duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (min/max) | 18.9 V / 20.9 V at 1 mA - guaranteed breakdown onset range; ensures consistent turn-on across production lots |
| VC @ IPPM | ≤27.6 V at 21.7 A - clamped voltage during 600 W transient; protects downstream ICs rated ≤24 V logic rails |
| PPPM | 600 W (10/1000 µs) - peak surge energy handling capacity; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) testing |
| IPPM | 21.7 A - peak pulse current capability; determines minimum trace width and PCB copper area required for thermal dissipation |
| TJ max. | +150 °C - maximum junction temperature; enables operation in high-ambient environments like motor drives and base stations |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with J-STD-020 reflow profiles |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional transient conduction path | Both terminals function identically; no cathode band marking; connects across protected line and return (e.g., RS-485 A/B or USB D+/D−) |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., CAN, RS-485) without polarity concerns |
| 600 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges up to 1 kV open-circuit / 0.5 kA short-circuit without failure |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets IPC-1752A material declaration requirements and automotive ELV directive; suitable for green manufacturing programs |
| AEC-Q101 qualified | Validated for automotive-grade reliability including HTOL, temperature cycling, and ESD robustness - approved for body electronics and infotainment |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without moisture sensitivity concerns; eliminates bake preconditioning in SMT line |
Applications
| Industrial Sensor Interface | Telecom Line Protection |
|---|---|
|
Use Scenario: Protecting analog output (4–20 mA) and digital I/O (RS-485) ports of PLC modules from inductive switching transients and lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed across signal pair (A/B) and shield ground to clamp common-mode and differential-mode transients within nanoseconds. Use Value: Limits clamped voltage to 27.6 V, safeguarding 24 V-rated RS-485 transceivers (e.g., SN65HVD72) and preventing latch-up or permanent damage. |
Use Scenario: Shielding Ethernet PHY interface (10/100BASE-TX) and POTS line drivers in VoIP gateways against EFT and surge events per IEC 61000-4-4/5. IC Role / Device Role / Timing Role: Placed on each twisted-pair line (TD+, TD−, RD+, RD−) referenced to chassis ground to suppress common-mode surges before magnetics. Use Value: Fast <1 ns response and low clamping voltage ensure signal integrity is preserved during transient events without disrupting link negotiation. |
| Automotive Body Control Module | Consumer Appliance Motor Drive |
|
Use Scenario: Protecting LIN bus nodes (e.g., door lock actuators, mirror controls) from load dump and ISO 7637-2 pulse 1/2/5a transients in 12 V systems. IC Role / Device Role / Timing Role: Connected between LIN line and vehicle chassis ground to absorb negative-going spikes and positive overshoots symmetrically. Use Value: AEC-Q101 qualification and 150 °C TJ max. enable reliable operation in under-hood environments without derating. |
Use Scenario: Safeguarding microcontroller GPIOs and MOSFET gate drivers in washing machine motor control boards exposed to brush-commutator noise and relay bounce. IC Role / Device Role / Timing Role: Mounted directly at MCU I/O pins and half-bridge driver inputs to shunt fast-rising edge transients (<10 ns rise time) before propagation. Use Value: Low incremental surge resistance minimizes voltage overshoot during clamping, preventing false triggering or reset of 3.3 V/5 V logic circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17CAHE3/I | Same electrical specs, but RoHS-compliant without halogen restriction (E3 suffix); not AEC-Q101 qualified | Suitable for commercial/industrial use only; excludes automotive qualification requirements | Select when halogen-free content is not mandated and AEC-Q101 is unnecessary |
| SMAJ17CAHM3 | Lower 400 W PPPM, larger SMA package (DO-214AC), same VWM/VC specs | Reduced surge margin; less board space efficiency; lower thermal mass limits repetitive surge endurance | Choose only if SMB footprint is unavailable or legacy SMA layout must be reused |
Compared with SMBJ17CAHE3/I, the SMBJ17CAHM3/I adds halogen-free compliance and AEC-Q101 qualification without sacrificing clamping performance; versus SMAJ17CAHM3, it delivers 50 % higher surge power in a smaller, more thermally efficient SMB package - making it optimal for space-constrained, high-reliability designs.
Availability
SMBJ17CAHM3/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, and telecom line protection requiring stable component supply, long-term lifecycle support, and full traceability.
Supply support for SMBJ17CAHM3/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, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series was developed for high-energy transient suppression in compact surface-mount formats, targeting automotive, industrial, and communications systems where robustness and repeatability under surge stress are mandatory.
FAQ
What is the clamping voltage of SMBJ17CAHM3/I at its rated peak pulse current?
The SMBJ17CAHM3/I clamps to a maximum of 27.6 V at its peak pulse current of 21.7 A under the standard 10/1000 µs waveform. This value is measured and guaranteed per Vishay's datasheet (Document Number: 88392, Rev. 09-Jan-2024), ensuring downstream components see no more than this voltage during surge events. The SMBJ17CAHM3/I achieves this with low incremental surge resistance and a stable glass-passivated junction.
Is SMBJ17CAHM3/I suitable for automotive applications?
Yes, SMBJ17CAHM3/I is AEC-Q101 qualified, as indicated by the "HM3" suffix (halogen-free, RoHS-compliant, and automotive-grade). It has passed stress tests including high-temperature operating life, temperature cycling, and ESD robustness required for body electronics and infotainment systems. The SMBJ17CAHM3/I is explicitly listed in Vishay's automotive ordering codes table with qualification confirmation.
How does SMBJ17CAHM3/I differ from unidirectional SMBJ17A variants?
The SMBJ17CAHM3/I is bidirectional, meaning it clamps transients of either polarity symmetrically - ideal for AC-coupled or differential lines like RS-485 or CAN. In contrast, unidirectional SMBJ17A has a cathode band and conducts only in reverse bias; forward conduction is blocked. Electrical specs such as VWM, VBR, and VC are matched, but circuit placement and polarity awareness differ fundamentally for the SMBJ17CAHM3/I.
What is the thermal resistance of SMBJ17CAHM3/I, and how does it affect layout?
The SMBJ17CAHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value guides PCB layout: to sustain repetitive surges, designers must provide adequate copper area and avoid excessive trace length. The SMBJ17CAHM3/I's RθJL of 20 °C/W also supports localized heat sinking via wide traces connected to ground planes.
Does SMBJ17CAHM3/I require special handling during reflow soldering?
No - SMBJ17CAHM3/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 baking or dry-pack requirements. The matte tin-plated leads comply with J-STD-002 and JESD 22-B102, ensuring reliable solder wetting and intermetallic formation during assembly of the SMBJ17CAHM3/I.
SMBJ17CAHM3/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:
- Discontinued at Digi-Key
- 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/I FAQ
1.How can I place an order for SMBJ17CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17CAHM3/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/I reliable?
The price and inventory of SMBJ17CAHM3/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/I is usually 5 days.
3.What payment methods are accepted for SMBJ17CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17CAHM3/I?
SMBJ17CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17CAHM3/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/I?
For technical support, including SMBJ17CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17CAHM3/I requirements.
6.How does Aetrix verify that SMBJ17CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ17CAHM3/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/I meets industry standards.
7.What is the process for return or replacement of SMBJ17CAHM3/I?
All SMBJ17CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17CAHM3/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/I part is unused and in its original packaging.
Return procedure for SMBJ17CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17CAHM3/I Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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