My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMB8J17CAHE3/5B
- Part No.:
- SMB8J17CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J17CAHE3/5B.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,091
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMB8J17CAHE3/5B 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), 18.9–20.9 V breakdown range (VBR at 1 mA), 27.6 V clamping voltage (VC) at 29.0 A peak pulse current (IPPM), and 800 W peak pulse power (10/1000 µs waveform), qualified to AEC-Q101 for automotive use.
For engineers reviewing the SMB8J17CAHE3/5B datasheet, SMB8J17CAHE3/5B pinout, SMB8J17CAHE3/5B application, or SMB8J17CAHE3/5B equivalent, this device is selected for robust ESD and lightning surge protection in automotive sensor interfaces, industrial I/O modules, and telecom line cards where bidirectional clamping, low leakage (<1.0 µA at VWM), and MSL Level 1 reflow compatibility are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance and low incremental surge resistance, while the SMB package delivers high power density (800 W) in a low-profile surface-mount footprint compatible with automated placement.
The device meets AEC-Q101 stress testing for automotive underhood applications and exhibits thermal resistance of RθJA = 72 °C/W (typ.) and RθJL = 20 °C/W (typ.), supporting reliable operation up to TJ = +150 °C. Clamping performance is specified per ANSI/IEEE C62.35, with VC measured at IPPM using standardized 10/1000 µs waveform.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range for protected circuitry. |
| VBR (min/max) | 18.9 V / 20.9 V at IT = 1 mA - Confirmed breakdown threshold window; ensures predictable turn-on during transients. |
| VC @ IPPM | 27.6 V at IPPM = 29.0 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to safe levels. |
| PPPM | 800 W (10/1000 µs) - Peak surge energy handling capacity; supports IEC 61000-4-5 Level 4 (4 kV) compliance when properly laid out. |
| ID @ VWM | <1.0 µA - Ultra-low reverse leakage at rated standoff; avoids signal distortion or bias shift in high-impedance sensor lines. |
| TJ max. | +150 °C - Maximum junction temperature rating; enables deployment in engine control units and powertrain modules. |
| AEC-Q101 | Qualified - Validated for automotive reliability including HTOL, TC, UHAST, and ESD; supports PPAP documentation. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking; matte tin-plated leads, RoHS-compliant and halogen-free (HE3 suffix), MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (Anode) | AC-coupled terminal | Both terminals are functionally identical; bidirectional conduction allows symmetrical clamping regardless of surge polarity. |
| Anode (Cathode) | AC-coupled terminal | No color band or marking; terminals interchangeable-no orientation requirement during PCB placement. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of differential or AC signal paths (e.g., CAN FD, RS-485, audio lines) without polarity concerns. |
| AEC-Q101 qualification | Validates reliability for automotive applications including powertrain, ADAS sensors, and body electronics under extended temperature and humidity stress. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage exposure during surges-critical for protecting 3.3 V or 5 V logic interfaces downstream of the TVS. |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C without preconditioning; eliminates moisture sensitivity handling requirements in SMT lines. |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal cycling and humidity exposure. |
Applications
| Automotive Sensor Protection | Industrial I/O Protection |
|---|---|
|
Use Scenario: Protecting LIN bus and analog sensor outputs (e.g., pressure, temperature) in engine control modules from load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector interface to clamp ±200 V transients before reaching MCU ADC inputs or LIN transceivers. Use Value: Prevents latch-up or permanent damage to 12-bit SAR ADCs and LIN PHYs by limiting voltage to ≤27.6 V during 800 W surges. |
Use Scenario: Shielding 24 V digital input channels on PLC backplanes from inductive switching spikes generated by solenoid valves and contactors. IC Role / Device Role / Timing Role: Primary surge suppression element between field wiring and optocoupler input stage, absorbing repetitive 10/1000 µs pulses. Use Value: Extends optocoupler lifetime by reducing stress on internal LED and phototransistor; maintains >10⁶ surge cycles per channel. |
| Telecom Line Interface | Consumer USB Port Protection |
|
Use Scenario: Safeguarding Ethernet PHY magnetics and PoE controller pins against lightning-induced surges on outdoor telecom node ports. IC Role / Device Role / Timing Role: Secondary-level TVS mounted adjacent to RJ45 jack, working in coordination with gas discharge tube (GDT) primary protection. Use Value: Provides fast-response clamping (sub-nanosecond) after GDT fires, limiting residual voltage to <30 V during 6 kV/3 kA threats. |
Use Scenario: Adding robust ESD immunity to USB 2.0 data lines (D+/D−) in automotive infotainment head units exposed to human-body-model (HBM) discharges. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at USB connector, shunting ±15 kV HBM events away from USB transceiver ESD diodes. Use Value: Achieves IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) without degrading signal integrity (CJ not specified but typical for SMB bidirectional is <100 pF). |
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-E3/5B | Unqualified for AEC-Q101; same VWM/VBR/VC specs but commercial-grade only; RθJA = 72 °C/W identical. | Limited to non-automotive industrial or consumer use; not acceptable for PPAP-submitted automotive BOMs. | Select when cost sensitivity outweighs automotive qualification requirements and full lifecycle traceability is not mandated. |
| SMCJ17CAHE3/5B | Same AEC-Q101 qualification, but SMC (DO-214AB) package: larger footprint (7.11 × 6.22 mm vs. SMB's 4.57 × 3.94 mm), higher PPPM (1500 W), higher VC (33.2 V). | Better suited for higher-energy threats (e.g., 10/1000 µs 6 kV tests); requires PCB layout revision due to larger pad area and thermal mass. | Choose when system-level surge testing exceeds 800 W capability or when board space permits larger package for margin extension. |
Compared with SMBJ17CA-E3/5B, SMB8J17CAHE3/5B adds AEC-Q101 validation for automotive deployment; compared with SMCJ17CAHE3/5B, it trades 700 W extra surge capacity for 40% smaller PCB area and identical thermal resistance per unit volume-ideal for space-constrained ECUs.
Availability
SMB8J17CAHE3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial programmable logic controllers, and telecom line card designs requiring stable component supply with full AEC-Q101 traceability and RoHS/halogen-free compliance.
Supply support for SMB8J17CAHE3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMB8JxxCAHE3 series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-reliability bidirectional surge suppression in harsh environments-including under-hood automotive, factory automation, and outdoor infrastructure.
FAQ
What is the maximum clamping voltage of SMB8J17CAHE3/5B under a 10/1000 µs surge?
The SMB8J17CAHE3/5B clamps to a maximum of 27.6 V when subjected to its rated peak pulse current of 29.0 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and represents the upper limit of voltage seen by downstream circuitry during worst-case surge events-critical for ensuring compatibility with 3.3 V or 5 V logic interfaces.
Is SMB8J17CAHE3/5B suitable for protecting CAN FD bus lines?
Yes, SMB8J17CAHE3/5B is well-suited for CAN FD protection due to its bidirectional symmetry, 17 V standoff voltage matching typical 12 V automotive supply rails, and fast response time. Its 27.6 V clamping level stays safely below the absolute maximum ratings of common CAN FD transceivers (e.g., TJA1044G, MAX33042E), and its AEC-Q101 qualification ensures robustness in vehicle networks.
Does SMB8J17CAHE3/5B have polarity markings on the package?
No, SMB8J17CAHE3/5B has no polarity markings because it is a bidirectional TVS diode. Both terminals are functionally identical-there is no anode or cathode designation. The SMB (DO-214AA) case is unmarked, and orientation during placement has no electrical impact, simplifying automated assembly and reducing misplacement risk.
What is the junction-to-ambient thermal resistance (RθJA) of SMB8J17CAHE3/5B?
The typical junction-to-ambient thermal resistance (RθJA) of SMB8J17CAHE3/5B is 72 °C/W, measured on a standard 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal. This value enables accurate thermal modeling in automotive and industrial environments where ambient temperatures reach +105 °C, ensuring the device remains within its +150 °C maximum junction temperature limit under sustained surge duty cycles.
How does the HE3 suffix in SMB8J17CAHE3/5B affect compliance and qualification?
HE3 denotes RoHS-compliant, AEC-Q101 qualified construction with halogen-free molding compound. Unlike E3 (RoHS commercial) or HM3 (halogen-free commercial), HE3 confirms full automotive stress testing-including temperature cycling, unbiased HAST, and ESD-making SMB8J17CAHE3/5B appropriate for safety-critical subsystems requiring PPAP documentation and long-term supply assurance.
SMB8J17CAHE3/5B 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):
- 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)
SMB8J17CAHE3/5B FAQ
1.How can I place an order for SMB8J17CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J17CAHE3/5B 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 SMB8J17CAHE3/5B reliable?
The price and inventory of SMB8J17CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J17CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J17CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J17CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J17CAHE3/5B?
SMB8J17CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J17CAHE3/5B 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 SMB8J17CAHE3/5B?
For technical support, including SMB8J17CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J17CAHE3/5B requirements.
6.How does Aetrix verify that SMB8J17CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J17CAHE3/5B 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 SMB8J17CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J17CAHE3/5B?
All SMB8J17CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J17CAHE3/5B, 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 SMB8J17CAHE3/5B part is unused and in its original packaging.
Return procedure for SMB8J17CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J17CAHE3/5B Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
