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Vishay General Semiconductor - Diodes Division SMBJ17CAHE3_B/I
- Part No.:
- SMBJ17CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17CAHE3_B/I.pdf
- Description:
- 600W,17V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,648
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Product details
Overview
SMBJ17CAHE3_B/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 or power lines. 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 to ≤27.6 V at 21.7 A peak surge current - deployed in industrial sensor interfaces and automotive body control modules.
For engineers reviewing the SMBJ17CAHE3_B/I datasheet, SMBJ17CAHE3_B/I pinout, SMBJ17CAHE3_B/I application, or SMBJ17CAHE3_B/I equivalent, this device is selected for robust ESD and lightning surge protection where bidirectional clamping, low clamping ratio, and AEC-Q101 qualification are required in space-constrained PCB layouts.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical VBR min/max (18.9–20.9 V), ID ≤1.0 µA at VWM, and VC = 27.6 V at IPPM = 21.7 A under 10/1000 µs waveform. Its glass-passivated junction ensures stable leakage and fast response (<1 ns), while MSL Level 1 rating supports lead-free reflow up to 260 °C.
The device meets UL 497B recognition (QVGQ2) and is AEC-Q101 qualified (HE3 suffix), enabling use in automotive subsystems requiring validated reliability. Thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W define its derating behavior above 25 °C ambient, per Figure 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 18.9 / 20.9 V at IT = 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 27.6 V at 21.7 A - Clamped voltage under 600 W 10/1000 µs surge; limits stress on downstream ICs like microcontrollers or CAN transceivers. |
| PPPM | 600 W - Peak transient energy absorption capability; sustains short-duration surges without failure. |
| ID @ VWM | ≤1.0 µA - Ultra-low reverse leakage at rated standoff; prevents DC loading or battery drain in always-on systems. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood or industrial enclosures with elevated ambient. |
| Package | SMB (DO-214AA) - 0.220" × 0.155" footprint with matte tin leads; compatible with automated SMT placement and J-STD-002 soldering. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity event) | Accepts surge current during negative-going transients; connects to line being protected. |
| Cathode | Transient current entry (positive polarity event) | Accepts surge current during positive-going transients; connects to same line as Anode in bidirectional configuration. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN, USB D+/D−) without polarity concerns. |
| AEC-Q101 qualification | Validated for automotive applications including body electronics and infotainment; supports PPAP and long-term reliability requirements. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV surge) and ISO 7637-2 Pulse 1/2a/3a when properly laid out with minimal trace inductance. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during clamping - critical for protecting 3.3 V or 5 V logic rails with tight VIH/VIL margins. |
| MSL Level 1, 260 °C peak | Eliminates moisture sensitivity concerns; allows standard lead-free reflow without baking or special handling. |
Applications
| Automotive Body Control Module | Industrial RS-485 Sensor Network |
|---|---|
Use Scenario: Protecting LIN bus lines and door module inputs against load dump and inductive switching spikes in 12 V vehicle systems. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between LIN transceiver and connector, shunting surge energy to ground. Use Value: Prevents latch-up or permanent damage to LIN transceivers (e.g., TLE6250) during ISO 7637-2 Pulse 5a events up to 100 V. |
Use Scenario: Shielding differential RS-485 nodes in factory automation PLCs from EFT bursts and ground potential differences. IC Role / Device Role / Timing Role: Common-mode TVS across A/B lines and to ground, suppressing common-mode transients without distorting data integrity. Use Value: Maintains signal fidelity under IEC 61000-4-4 Level 4 (2 kV EFT) by limiting common-mode excursion to <30 V peak. |
| Consumer Appliance Motor Drive Interface | Telecom Power Input Stage |
Use Scenario: Safeguarding microcontroller GPIOs connected to brushed DC motor feedback circuits exposed to back-EMF spikes. IC Role / Device Role / Timing Role: Local TVS at motor driver IC output pins, clamping flyback voltage before it reaches MCU input protection diodes. Use Value: Avoids cumulative degradation of internal ESD structures by diverting >95 % of 600 W surge energy externally. |
Use Scenario: Front-end protection of 48 V telecom power supplies against lightning-induced surges on primary-side DC input. IC Role / Device Role / Timing Role: Secondary-stage TVS after bulk filter, clamping residual transients that pass through MOV-based primary protection. Use Value: Limits voltage seen by DC-DC controller ICs (e.g., LM5017) to ≤27.6 V, preventing overvoltage shutdown or gate oxide rupture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17CA-E3/52 | Same electrical specs and SMB package; RoHS-compliant commercial grade (non-AEC-Q101). | Lacks automotive qualification; suitable for consumer/industrial designs not requiring PPAP or extended temperature validation. | Select when AEC-Q101 is not mandated and cost optimization is prioritized. |
| SMCJ17CAHE3_A/H | Higher 1500 W PPPM rating in larger SMC (DO-214AB) package; identical VWM/VBR/VC specs. | Requires larger PCB area and higher thermal mass; better suited for high-energy surge environments (e.g., outdoor telecom). | Choose when system-level surge testing exceeds IEC 61000-4-5 Level 4 and layout allows SMC footprint. |
Compared with SMBJ17CAHE3_B/I, SMBJ17CA-E3/52 offers identical protection performance without automotive qualification, while SMCJ17CAHE3_A/H delivers 2.5× higher surge capacity in a larger package - selection depends on qualification needs and board space constraints.
Availability
SMBJ17CAHE3_B/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer appliance motor controls, and telecom power input stages requiring stable component supply and AEC-Q101 compliance.
Supply support for SMBJ17CAHE3_B/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 optimization.
The SMBJ series targets high-reliability transient suppression in automotive, industrial, and communications systems - engineered for fast response, low clamping, and robust surge handling in compact surface-mount formats.
FAQ
What is the maximum clamping voltage of SMBJ17CAHE3_B/I under a 10/1000 µs surge?
The SMBJ17CAHE3_B/I clamps to a maximum of 27.6 V when subjected to its rated peak pulse current of 21.7 A (10/1000 µs waveform). This value is measured per Figure 1 and Table 1 in the Vishay datasheet 88392 and defines the upper voltage limit imposed on protected circuitry during transient events.
Is SMBJ17CAHE3_B/I suitable for automotive applications?
Yes, SMBJ17CAHE3_B/I is AEC-Q101 qualified (denoted by HE3 suffix) and UL 497B recognized, making it suitable for automotive applications including body control modules, lighting drivers, and infotainment interfaces. Its operating junction temperature range of –55 °C to +150 °C supports under-hood and cabin environments.
How does the bidirectional design of SMBJ17CAHE3_B/I affect its circuit placement?
The bidirectional design of SMBJ17CAHE3_B/I means it has no polarity marking and functions identically in both directions - ideal for protecting AC-coupled or floating lines like RS-485, CAN, or audio signals. It is placed across the line-to-line or line-to-ground without regard to orientation, simplifying layout and reducing BOM variants.
What is the standoff voltage (VWM) rating for SMBJ17CAHE3_B/I?
The standoff voltage (VWM) for SMBJ17CAHE3_B/I is 17 V - the maximum DC or continuous peak reverse voltage the device can withstand without entering breakdown. This rating ensures compatibility with 12 V and 15 V nominal systems while maintaining low leakage (<1.0 µA) during normal operation.
Does SMBJ17CAHE3_B/I require special PCB layout considerations?
Yes - to achieve rated 600 W surge performance, SMBJ17CAHE3_B/I must be mounted on minimum recommended copper pads (0.2" × 0.2" per terminal per datasheet Fig. 4), with short, wide traces to minimize inductance. Ground paths should be low-impedance, and placement should be as close as possible to the connector or IC being protected.
SMBJ17CAHE3_B/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:
- Active
- 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)
SMBJ17CAHE3_B/I FAQ
1.How can I place an order for SMBJ17CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17CAHE3_B/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 SMBJ17CAHE3_B/I reliable?
The price and inventory of SMBJ17CAHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ17CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ17CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17CAHE3_B/I?
SMBJ17CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17CAHE3_B/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 SMBJ17CAHE3_B/I?
For technical support, including SMBJ17CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17CAHE3_B/I requirements.
6.How does Aetrix verify that SMBJ17CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ17CAHE3_B/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 SMBJ17CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ17CAHE3_B/I?
All SMBJ17CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17CAHE3_B/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 SMBJ17CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ17CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17CAHE3_B/I Tags
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