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Vishay General Semiconductor - Diodes Division SMB8J17CAHE3_B/H
- Part No.:
- SMB8J17CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J17CAHE3_B/H.pdf
- Description:
- 800W,17V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,044
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Product details
Overview
SMB8J17CAHE3_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), 29.0 A peak pulse current (IPPM) under 10/1000 μs waveform, 27.6 V clamping voltage (VC), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMB8J17CAHE3_B/H datasheet, SMB8J17CAHE3_B/H pinout, SMB8J17CAHE3_B/H application, or SMB8J17CAHE3_B/H equivalent, this device is selected for robust ESD and lightning surge protection in automotive sensor interfaces, industrial I/O modules, and DC power rail conditioning where low-leakage (<1.0 μA at VWM), fast response (<1 ns), and MSL Level 1 reliability are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 18.9–20.9 V (min/max) at 1.0 mA test current. Its clamping behavior limits transient-induced overvoltage to ≤27.6 V at 29.0 A, enabling protection of downstream 3.3 V or 5 V logic interfaces without latch-up risk.
Thermally, it exhibits RθJA = 72 °C/W and RθJL = 20 °C/W, supporting operation up to TJ = +150 °C. The glass-passivated junction and matte tin-plated leads comply with J-STD-002 solderability and JESD22-B102 whisker resistance standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin for 12 V automotive systems. |
| VBR (Breakdown Voltage) | 18.9–20.9 V at 1.0 mA - Voltage at which device transitions into avalanche conduction; ensures reliable triggering above normal system transients. |
| VC (Clamping Voltage) | 27.6 V at IPPM = 29.0 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines maximum stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 800 W - Maximum non-repetitive surge energy absorption capability; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) compliance when properly mounted. |
| ID (Reverse Leakage) | <1.0 μA at VWM - Negligible standby current draw; avoids signal integrity degradation or battery drain in always-on circuits. |
| TJ max. | +150 °C - Enables deployment in under-hood automotive environments and high-temperature industrial enclosures. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking omitted for bidirectional configuration. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H). Mounting requires 5.0 mm × 5.0 mm copper pads per terminal per Vishay recommendation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | No polarity marking; terminals interchangeable - enables single-component protection on AC-coupled or floating lines without orientation constraints. |
| Case (body) | Thermal and mechanical interface | Plastic molding meets UL 94 V-0; provides mechanical anchoring and thermal path to PCB copper for sustained power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics including engine control units, ADAS sensors, and body control modules requiring long-term field reliability. |
| 800 W peak pulse power (10/1000 μs) | Supports protection against severe surges such as ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 combination wave (4 kV/2 Ω). |
| Low clamping ratio (VC/VWM ≈ 1.62) | Minimizes overvoltage overshoot relative to operating voltage - critical for safeguarding 3.3 V or 5 V microcontrollers and transceivers. |
| MSL Level 1 (260 °C peak reflow) | Enables standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements prior to placement. |
| Glass-passivated junction | Ensures stable electrical parameters over time and temperature; eliminates risk of junction corrosion or parameter drift in humid environments. |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Transceiver Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN physical layer transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump, jump-start, and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point, shunting surge energy to ground before reaching transceiver IC input pins. Use Value: Maintains signal integrity during 12 V system transients while limiting clamped voltage to 27.6 V - below absolute maximum ratings of common CAN/LIN transceivers (e.g., TJA1042, MCP2551). |
Use Scenario: Safeguarding RS-485/CAN FD communication lines in programmable logic controllers (PLCs) and motor drives exposed to inductive switching noise and ground potential differences. IC Role / Device Role / Timing Role: Symmetrical transient suppressor bridging differential pair (CAN_H/CAN_L) or line-to-ground, activated within <1 ns of overvoltage onset. Use Value: Prevents data corruption and transceiver latch-up during repetitive 1 kV/500 A surge events (IEC 61000-4-4), enabled by 800 W PPPM rating and sub-μA leakage at 17 V. |
| DC Power Rail Surge Suppression | Consumer Appliance Motor Control Protection |
|
Use Scenario: Clamping voltage spikes on 12–24 V DC input rails of embedded controllers in HVAC systems, vending machines, and security panels. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing energy from relay coil flyback, contact bounce, or lightning-induced coupling on long cables. Use Value: Withstands 29.0 A peak surge current and clamps to 27.6 V - ensuring downstream DC-DC converters (e.g., LM5017, MPQ4312) remain within safe input range during worst-case transients. |
Use Scenario: Shielding microcontroller GPIOs and gate drivers in washing machine, dishwasher, and power tool motor control boards from commutation spikes and ESD. IC Role / Device Role / Timing Role: Localized protection at motor driver IC inputs and feedback sensing nodes, placed adjacent to connectors and relays. Use Value: Low 1.0 μA leakage preserves battery-backed real-time clock accuracy; AEC-Q101 qualification ensures longevity in thermally cycled appliance environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ17CA-E3/52 | Same SMB package, 17 V VWM, but rated for 600 W PPPM (vs. 800 W); no AEC-Q101 qualification. | Limited to commercial-grade industrial or consumer applications; unsuitable for automotive under-hood use. | Select only if cost sensitivity outweighs automotive reliability requirements and surge energy remains below 600 W. |
| SMCJ17CAHE3_A/H | Same VWM and AEC-Q101 rating, but larger SMC (DO-214AB) package with 1500 W PPPM and higher IPPM (43.3 A). | Requires larger PCB footprint and higher thermal mass; preferred where >800 W surge margin is needed. | Choose when protecting high-power subsystems (e.g., battery management, traction inverters) demanding greater energy handling. |
Compared with SMBJ17CA-E3/52, SMB8J17CAHE3_B/H delivers 33 % higher surge power rating and automotive qualification; versus SMCJ17CAHE3_A/H, it offers identical protection level in a 30 % smaller footprint - ideal for space-constrained automotive modules where 800 W suffices.
Availability
SMB8J17CAHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, DC power rail conditioning, and consumer appliance motor control requiring stable component supply and AEC-Q101-compliant surge protection.
Supply support for SMB8J17CAHE3_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, efficiency, and application-specific performance.
The SMB8JxxCA series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-density, high-reliability transient suppression in automotive and industrial systems where compact size and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMB8J17CAHE3_B/H at its rated peak pulse current?
The SMB8J17CAHE3_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 under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for protected circuits. The SMB8J17CAHE3_B/H maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C), making it suitable for under-hood automotive deployments.
Is SMB8J17CAHE3_B/H unidirectional or bidirectional, and how does that affect its PCB layout?
SMB8J17CAHE3_B/H is a bidirectional TVS diode, meaning it conducts symmetrically for both positive and negative transients - no cathode band or polarity marking is present. This allows flexible placement on AC-coupled lines, differential buses (e.g., CAN_H/CAN_L), or floating power domains without orientation constraints. Unlike unidirectional variants, the SMB8J17CAHE3_B/H eliminates risk of incorrect installation and simplifies layout verification in high-mix manufacturing environments.
Does SMB8J17CAHE3_B/H meet automotive reliability standards?
Yes, SMB8J17CAHE3_B/H is explicitly AEC-Q101 qualified, as confirmed in Vishay document 88422 (Revision 09-Jan-2024). This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD (HBM ≥ 8 kV, CDM ≥ 1 kV), validating its suitability for automotive powertrain, chassis, and body electronics. The "HE3" suffix denotes RoHS-compliant and AEC-Q101-qualified construction, distinguishing it from commercial-grade variants like SMBJ17CA-E3/52.
What is the thermal resistance of SMB8J17CAHE3_B/H, and how does it impact PCB design?
SMB8J17CAHE3_B/H has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W and junction-to-lead (RθJL) of 20 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. To maintain TJ ≤ 150 °C during repeated surges, designers must ensure adequate copper area and minimize trace length between the SMB8J17CAHE3_B/H anode/cathode terminals and ground/power planes. Reduced pad size increases RθJA and risks thermal runaway during high-duty-cycle transients.
How does SMB8J17CAHE3_B/H compare to SMBJ17CA in terms of surge handling capability?
SMB8J17CAHE3_B/H delivers 800 W peak pulse power (PPPM) under 10/1000 μs waveform, whereas SMBJ17CA is rated for 600 W. This 33 % higher energy absorption enables SMB8J17CAHE3_B/H to withstand more severe transients such as ISO 7637-2 Pulse 5a (load dump) without degradation. Both share identical VWM (17 V) and VC (27.6 V), but only SMB8J17CAHE3_B/H carries AEC-Q101 qualification - confirming its suitability for automotive safety-critical applications where SMBJ17CA is restricted to commercial use.
SMB8J17CAHE3_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)
SMB8J17CAHE3_B/H FAQ
1.How can I place an order for SMB8J17CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J17CAHE3_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 SMB8J17CAHE3_B/H reliable?
The price and inventory of SMB8J17CAHE3_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 SMB8J17CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMB8J17CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J17CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J17CAHE3_B/H?
SMB8J17CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J17CAHE3_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 SMB8J17CAHE3_B/H?
For technical support, including SMB8J17CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J17CAHE3_B/H requirements.
6.How does Aetrix verify that SMB8J17CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMB8J17CAHE3_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 SMB8J17CAHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMB8J17CAHE3_B/H?
All SMB8J17CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J17CAHE3_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 SMB8J17CAHE3_B/H part is unused and in its original packaging.
Return procedure for SMB8J17CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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