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Vishay General Semiconductor - Diodes Division SMB8J17CAHE3_A/H
- Part No.:
- SMB8J17CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J17CAHE3_A/H.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,750
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Product details
Overview
SMB8J17CAHE3_A/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 at 29.0 A peak pulse current (10/1000 µs), and 800 W peak pulse power dissipation - optimized for automotive-grade ESD and load-dump protection in sensor interfaces and power supply rails.
For engineers reviewing the SMB8J17CAHE3_A/H datasheet, SMB8J17CAHE3_A/H pinout, SMB8J17CAHE3_A/H application, or SMB8J17CAHE3_A/H equivalent, key selection criteria include its AEC-Q101 qualification, bidirectional symmetry, low clamping ratio (VC/VWM = 1.62), and compatibility with automated SMT assembly on standard 0.2" × 0.2" copper pads.
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 structure enables symmetrical clamping across both polarities without external polarity management.
Rated for -55 °C to +150 °C operation and qualified per AEC-Q101, SMB8J17CAHE3_A/H supports automotive subsystems requiring robust immunity to ISO 7637-2 pulse 1, 2a, 3a/b, and IEC 61000-4-2/4-4 events. Thermal resistance (RθJA = 72 °C/W) reflects its SMB package's ability to dissipate energy under short-duration surges when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 17 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below system rail. |
| VBR (Breakdown Voltage) | 18.9–20.9 V at 1 mA - onset of avalanche conduction; ensures reliable triggering above normal operating conditions. |
| VC (Clamping Voltage) | 27.6 V at IPPM = 29.0 A (10/1000 µs) - peak voltage seen by protected circuit during worst-case surge; limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 800 W - maximum single-event surge energy handling capability; validates suitability for automotive load-dump suppression. |
| ID (Reverse Leakage) | 1.0 µA at VWM - negligible standby current; avoids signal integrity degradation or battery drain in always-on circuits. |
| TJ max | 150 °C - junction temperature limit enabling use in under-hood automotive environments with minimal derating. |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 2.2 mm height; compatible with J-STD-020 MSL Level 1 reflow profiles. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional operation per JEDEC DO-214AA standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; no cathode band marking required - simplifies PCB layout and eliminates polarity orientation errors. |
| Case (body) | Thermal and mechanical interface | Non-conductive molding compound rated UL 94 V-0; transfers heat to copper pads via soldered terminations - requires 5.0 mm × 5.0 mm minimum pad area per lead per datasheet fig. 2. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, UHAST, and ESD - enables use in ADAS, body control, and infotainment modules without additional qualification. |
| Glass-passivated junction | Ensures stable breakdown characteristics over lifetime and temperature; eliminates risk of moisture-induced parameter drift in humid environments. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes overvoltage exposure to protected ICs - critical for safeguarding 3.3 V or 5 V logic interfaces connected to long cables or inductive loads. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking - reduces manufacturing complexity and cost in high-volume SMT lines. |
| Halogen-free option unavailable | This variant uses RoHS-compliant matte tin plating but is not halogen-free (suffix HE3 ≠ HM3); verify compliance against IPC-1752A if halogen restriction applies. |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Transceiver Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceivers and analog sensor inputs (e.g., pressure, temperature) from ESD and inductive switching spikes in vehicle cabins and engine bays. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point or IC input pins to shunt surge current away from sensitive analog front-ends and communication PHYs. Use Value: Maintains signal integrity under ISO 10605 ±30 kV contact discharge while limiting clamped voltage to 27.6 V - well below absolute maximum ratings of common transceivers like TJA1042 or MCP2561. |
Use Scenario: Safeguarding RS-485/CAN FD physical layer ICs in factory automation PLCs and motor drives exposed to ground bounce and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS placed differential-line-to-ground on bus pairs to absorb fast transients without distorting data eye diagrams. Use Value: 27.6 V clamping ensures receiver common-mode range remains within spec during 1 kV/µs surges; SMB footprint allows placement adjacent to connectors without trace length penalties. |
| Consumer USB Port ESD Protection | DC Power Input Surge Suppression |
|
Use Scenario: Shielding USB 2.0 data lines (D+/D−) and VBUS in portable medical devices and smart home hubs against IEC 61000-4-2 level 4 (±15 kV air) events. IC Role / Device Role / Timing Role: Bidirectional clamp bridging signal pair to ground, leveraging symmetric breakdown to protect both positive and negative ESD strikes. Use Value: Sub-1 ns response time prevents latch-up in USB PHYs; 1.0 µA leakage avoids interference with pull-up/pull-down resistors defining USB enumeration states. |
Use Scenario: Front-end protection for 12 V/24 V DC power supplies feeding microcontrollers and displays in vending machines and kiosks subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary surge diverter placed between input connector and bulk capacitor, absorbing multi-hundred-joule transients before they reach downstream regulators. Use Value: 800 W peak power rating handles 10/1000 µs surges up to 29 A - sufficient for IEC 61000-4-5 combination wave (1 Ω source) testing at 2 kV line-to-ground. |
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 SMB package and 17 V VWM, but commercial-grade (non-AEC-Q101); RθJA = 72 °C/W identical, but not qualified for automotive temperature cycling or humidity testing. | Limited to industrial or consumer applications where AEC-Q101 is not mandated; lower cost but unsuitable for OEM automotive BOMs. | Select SMBJ17CA-E3/52 only when automotive qualification is unnecessary and cost sensitivity outweighs long-term reliability validation requirements. |
| SMCJ17CAHE3_A/H | Same AEC-Q101 qualification and electrical specs, but larger SMC (DO-214AB) package - higher 1500 W PPPM rating and lower RθJA (40 °C/W), yet occupies ~2.5× PCB area. | Better suited for high-energy surges (e.g., alternator load dump) where 800 W is marginal; requires redesign of pad layout and stencil. | Choose SMCJ17CAHE3_A/H only when surge threat level exceeds SMB8J17CAHE3_A/H capability - otherwise, SMB8J17CAHE3_A/H delivers optimal power density and layout efficiency. |
Compared with SMBJ17CA-E3/52, SMB8J17CAHE3_A/H adds automotive qualification without sacrificing clamping performance or footprint; versus SMCJ17CAHE3_A/H, it trades 43% lower surge rating for 60% smaller board space and identical thermal interface requirements.
Availability
SMB8J17CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor protection, industrial CAN bus hardening, and DC power input surge suppression requiring stable component supply across production lifecycles.
Supply support for SMB8J17CAHE3_A/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, power density, and automotive-grade qualification.
The SMB8JxxCAHE3 series belongs to Vishay's TRANSZORB® family of high-power-density TVS diodes, engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J17CAHE3_A/H at its rated peak pulse current?
The SMB8J17CAHE3_A/H has a maximum clamping voltage (VC) of 27.6 V when subjected to its specified peak pulse current (IPPM) of 29.0 A under the 10/1000 µs waveform. This value is measured at TA = 25 °C with devices mounted on 0.2" × 0.2" copper pads per Vishay document 88422. The clamping voltage directly determines the maximum overvoltage stress imposed on protected circuitry during surge events, making it a critical parameter for interface IC survivability.
Is SMB8J17CAHE3_A/H suitable for bidirectional signal line protection?
Yes, SMB8J17CAHE3_A/H is explicitly designed as a bidirectional TVS diode, with symmetrical breakdown and clamping behavior for both polarities. Its datasheet lists identical VBR min/max and VC values for positive and negative transients, and it carries no polarity marking - confirming suitability for protecting differential buses like CAN, RS-485, or USB D+/D− without directional constraints. This eliminates the need for dual unidirectional devices or polarity-aware layout.
Does SMB8J17CAHE3_A/H meet automotive reliability standards?
Yes, SMB8J17CAHE3_A/H is AEC-Q101 qualified, as confirmed by its HE3 suffix and explicit listing in Vishay's automotive-grade ordering codes. This qualification covers stress tests including high-temperature operating life, temperature cycling, unbiased highly accelerated stress testing (UHAST), and ESD (HBM ≥ 8 kV). It is approved for use in automotive subsystems such as body electronics, infotainment, and ADAS sensors where long-term reliability under thermal and mechanical stress is mandatory.
What is the thermal resistance of SMB8J17CAHE3_A/H, and how does it affect layout?
SMB8J17CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as defined in Vishay document 88422. This value assumes standard PCB copper thickness and no internal plane coupling. To maintain safe junction temperatures during repetitive surges, designers must adhere to this pad layout - reducing pad size increases thermal impedance and risks exceeding the 150 °C TJ max during high-duty-cycle events.
How does SMB8J17CAHE3_A/H differ from the SMBJ17CA series?
SMB8J17CAHE3_A/H differs from the SMBJ17CA series primarily in surge rating and qualification: SMB8J17CAHE3_A/H delivers 800 W peak pulse power (bidirectional) and is AEC-Q101 qualified, whereas SMBJ17CA offers 600 W and is commercial-grade only. Both share identical VWM (17 V), VC (27.6 V), and SMB package dimensions, but SMB8J17CAHE3_A/H undergoes extended automotive stress screening and supports higher surge currents - making it the required choice for Tier 1 automotive designs.
SMB8J17CAHE3_A/H 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):
- 29A
- Power - Peak Pulse:
- 800W
- Power Line Protection:
- No
- Applications:
- -
- 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_A/H FAQ
1.How can I place an order for SMB8J17CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J17CAHE3_A/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_A/H reliable?
The price and inventory of SMB8J17CAHE3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J17CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J17CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J17CAHE3_A/H?
SMB8J17CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J17CAHE3_A/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_A/H?
For technical support, including SMB8J17CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J17CAHE3_A/H requirements.
6.How does Aetrix verify that SMB8J17CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J17CAHE3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J17CAHE3_A/H?
All SMB8J17CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J17CAHE3_A/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_A/H part is unused and in its original packaging.
Return procedure for SMB8J17CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J17CAHE3_A/H Tags
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