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Vishay General Semiconductor - Diodes Division SMBJ17CAHE3_A/H
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- Part No.:
- SMBJ17CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17CAHE3_A/H.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBJ17CAHE3_A/H 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 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 - used for protecting MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ17CAHE3_A/H datasheet, SMBJ17CAHE3_A/H pinout, SMBJ17CAHE3_A/H application, or SMBJ17CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical avalanche behavior in both directions, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMB package supports high thermal dissipation via PCB copper pad conduction.
The SMBJ17CAHE3_A/H is rated for 600 W peak pulse power under 10/1000 µs waveform with 0.01% duty cycle, and derates linearly above 25 °C ambient per Fig. 2. It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown |
| VBR (min/max) | 18.9 V / 20.9 V at 1 mA - guaranteed avalanche onset range; ensures predictable clamping threshold across production lot |
| VC @ IPPM | 27.6 V at 21.7 A - maximum clamped voltage during 600 W transient; limits stress on downstream ICs or MOSFETs |
| PPPM | 600 W - peak pulse power handling with 10/1000 µs waveform; supports robust protection against lightning-induced surges |
| IPPM | 21.7 A - peak surge current capability; determines minimum trace width and pad size needed for reliable energy dissipation |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with JEDEC-compliant pick-and-place |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals function as interchangeable anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal accepts positive or negative transient; no fixed polarity - simplifies PCB layout and eliminates orientation errors |
| Terminal 2 | Anode/Cathode (bidirectional) | Paired with Terminal 1 to form symmetrical clamping path; requires equal copper pad area (0.2" × 0.2") per terminal for thermal balance |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN FD) without external polarity management |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics where reliability over temperature cycling and vibration is critical |
| 600 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 surge (4 kV line-to-line) when mounted per recommended pad layout |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes overvoltage exposure to protected circuitry - critical for 3.3 V or 5 V logic interfaces with tight voltage margins |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life before reflow; eliminates bake-out requirement and supports standard SMT assembly flow |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback sensing lines against inductive kickback from brushed DC motors and solenoids. IC Role / Device Role / Timing Role: Voltage clamping element placed directly across motor driver output pins or op-amp input nodes. Use Value: Limits transient overshoot to ≤27.6 V, preventing latch-up or oxide breakdown in 30 V-rated MOSFETs and rail-to-rail amplifiers. |
Use Scenario: ESD and load-dump surge protection on LIN bus transceivers and interior lighting PWM outputs. IC Role / Device Role / Timing Role: Bidirectional shunt clamp on data and power lines interfacing microcontrollers and LED drivers. Use Value: Survives ISO 7637-2 Pulse 5a (load dump up to 60 V) and IEC 61000-4-2 ±15 kV contact discharge without degradation. |
| Telecom Power Supply Inputs | Consumer Sensor Interface Boards |
|
Use Scenario: Input-stage protection for 24 V DC-DC converters in base station remote radio units exposed to induced lightning surges. IC Role / Device Role / Timing Role: Primary transient suppressor upstream of input filter capacitors and rectifier stages. Use Value: Clamps 600 W surges within 1 ns, limiting voltage rise across bulk capacitor to <30 V and preserving hold-up time integrity. |
Use Scenario: Signal line protection for I²C and analog sensor outputs (e.g., temperature, humidity) in smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) shunt device placed adjacent to connector pins and IC bond pads. Use Value: Maintains signal integrity with <0.5 V forward drop at 1 A, while suppressing ESD events without distorting 100 kHz sensor bandwidth. |
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 | Commercial-grade (non-AEC-Q101), same VWM/VBR/PPPM, identical SMB package and pinout | Lacks automotive qualification; suitable for industrial/commercial designs not requiring AEC validation | Select when cost sensitivity outweighs automotive reliability requirements and lifecycle assurance is not mandated |
| SAC17CA | Same VWM and PPPM, but in smaller SOD-123FL package (2.7 mm × 1.7 mm); lower IPPM (18.5 A) and higher VC (30.5 V) | Reduced board space but lower surge handling; limited thermal mass increases risk of thermal runaway under repetitive surges | Choose only for space-constrained consumer applications with infrequent, low-energy transients - not for automotive or industrial use |
Compared with SMBJ17CAHE3_A/H, the E3/52 variant offers identical electrical performance at lower cost but no automotive qualification, while SAC17CA trades surge robustness and thermal stability for miniaturization - making SMBJ17CAHE3_A/H the optimal choice where AEC-Q101 compliance and 600 W clamping consistency are mandatory.
Availability
SMBJ17CAHE3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supply inputs requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle support.
Supply support for SMBJ17CAHE3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be eliminated through proven clamping performance and qualification rigor.
FAQ
What does the "HE3" suffix indicate in SMBJ17CAHE3_A/H?
The "HE3" suffix in SMBJ17CAHE3_A/H denotes RoHS-compliant construction with AEC-Q101 qualification. It confirms that the device meets automotive-grade reliability standards including temperature cycling, mechanical shock, and humidity testing - distinct from commercial-grade "E3" variants. SMBJ17CAHE3_A/H is fully traceable to Vishay's qualified automotive production line and carries the required documentation for Tier 1 automotive BOM acceptance.
Is SMBJ17CAHE3_A/H unidirectional or bidirectional?
SMBJ17CAHE3_A/H is a bidirectional TVS diode, as indicated by the "CA" suffix. It provides symmetrical clamping for both positive and negative transients without polarity dependence - unlike unidirectional "A" versions which require correct cathode orientation. This makes SMBJ17CAHE3_A/H ideal for AC signal lines, differential buses, and applications where voltage polarity reversal is possible.
What is the maximum clamping voltage of SMBJ17CAHE3_A/H at rated surge current?
The maximum clamping voltage (VC) of SMBJ17CAHE3_A/H is 27.6 V at its rated peak pulse current (IPPM) of 21.7 A, measured under the standard 10/1000 µs waveform. This value is guaranteed across temperature and process variation per Vishay's datasheet specifications and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Can SMBJ17CAHE3_A/H replace SMBJ17AHE3_A/H in a design?
No - SMBJ17CAHE3_A/H cannot directly replace SMBJ17AHE3_A/H because they differ fundamentally in polarity: SMBJ17CAHE3_A/H is bidirectional, while SMBJ17AHE3_A/H is unidirectional. Substituting them would result in improper clamping on negative transients or forward conduction issues. The "CA" vs. "A" suffix defines device functionality, not just packaging or grading; redesign and layout verification are required for any cross-type substitution.
What PCB layout guidance applies to SMBJ17CAHE3_A/H for optimal thermal performance?
For optimal thermal performance, SMBJ17CAHE3_A/H must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay's datasheet Figure 2 derating curve. Use internal ground/power planes connected via ≥4 thermal vias per pad (0.3 mm diameter, 0.8 mm spacing) to dissipate heat during repetitive surges. Avoid narrow traces between the device and protected node to minimize inductance and preserve clamping speed.
SMBJ17CAHE3_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):
- 21.7A
- Power - Peak Pulse:
- 600W
- 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 (SMBJ)
SMBJ17CAHE3_A/H FAQ
1.How can I place an order for SMBJ17CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17CAHE3_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 SMBJ17CAHE3_A/H reliable?
The price and inventory of SMBJ17CAHE3_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 SMBJ17CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ17CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17CAHE3_A/H?
SMBJ17CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17CAHE3_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 SMBJ17CAHE3_A/H?
For technical support, including SMBJ17CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17CAHE3_A/H requirements.
6.How does Aetrix verify that SMBJ17CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ17CAHE3_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 SMBJ17CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ17CAHE3_A/H?
All SMBJ17CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17CAHE3_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 SMBJ17CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMBJ17CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17CAHE3_A/H Tags
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