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Vishay General Semiconductor - Diodes Division SMAJ17CAHE3/61
- Part No.:
- SMAJ17CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ17CAHE3/61.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,122
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Product details
Overview
SMAJ17CAHE3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust ESD and surge protection on signal/power lines. It features a 17 V standoff voltage (VWM), 18.9–20.9 V breakdown range (VBR at 1 mA), 14.5 A peak pulse current (IPPM), and clamps transients to ≤27.6 V at IPPM, making it suitable for protecting automotive sensor interfaces and industrial I/O circuits.
For engineers reviewing the SMAJ17CAHE3/61 datasheet, SMAJ17CAHE3/61 pinout, SMAJ17CAHE3/61 application, or SMAJ17CAHE3/61 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 400 W peak pulse power (10/1000 μs), low leakage (<1 μA at 17 V), and compatibility with automated SMT assembly on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamped crowbar during transient events: when reverse voltage exceeds VBR, it avalanches into low-impedance conduction, diverting surge current away from protected circuitry. Its bidirectional symmetry ensures identical clamping behavior in both polarities-critical for AC-coupled or floating signal lines.
Thermally, it delivers 3.3 W steady-state power dissipation with RθJA = 120 °C/W and RθJL = 30 °C/W, enabling reliable operation up to +150 °C junction temperature. The glass-passivated junction and MSL Level 1 rating support high-yield reflow soldering at 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous reverse operating voltage before significant leakage begins; defines safe working margin below clamping threshold. |
| VBR (min/max) | 18.9 V / 20.9 V at 1 mA - Confirmed breakdown range ensuring predictable turn-on across production lot and temperature. |
| VC @ IPPM | ≤27.6 V at 14.5 A - Clamping voltage under 10/1000 μs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 400 W - Peak pulse power handling per 10/1000 μs waveform; supports IEC 61000-4-5 Level 4 surge immunity testing. |
| ID @ VWM | <1 μA - Reverse leakage at rated standoff voltage; ensures negligible standby power loss and signal integrity in high-impedance paths. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive and industrial environments without derating. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD HBM/MM per AEC specification. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current sink (bidirectional) | One terminal of symmetrical PN junction; conducts surge current equally in either direction relative to cathode. |
| Cathode | Transient current sink (bidirectional) | Second terminal of symmetrical PN junction; forms complete low-impedance path with anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR and VC performance in both polarities-enables single-device protection of AC, differential, or floating bus lines without polarity concerns. |
| AEC-Q101 qualification | Validated for automotive electronics per full stress test suite; supports design-in for ADAS sensors, body control modules, and infotainment interfaces. |
| 400 W peak pulse power | Withstands 10/1000 μs surges up to 14.5 A-meets IEC 61000-4-5 Ed. 3 surge immunity requirements for industrial and automotive end equipment. |
| MSL Level 1, 260 °C peak | Compatible with standard lead-free reflow profiles; eliminates moisture sensitivity handling constraints and pre-bake requirements. |
| Glass-passivated junction | Enhances long-term stability and reduces parameter drift under thermal cycling and humidity exposure-critical for 15+ year automotive service life. |
Applications
| Automotive Sensor Protection | Industrial I/O Interface |
|---|---|
|
Use Scenario: Protecting CAN, LIN, or analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly at connector entry point to shunt transients before reaching signal conditioning amplifier or microcontroller input. Use Value: Limits induced voltage to ≤27.6 V during 14.5 A surges-preserving signal integrity and preventing latch-up or gate oxide damage in downstream ASICs. |
Use Scenario: Safeguarding RS-485, 4–20 mA loop, or digital I/O lines in PLC modules exposed to motor switching noise and lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional transient suppressor mounted across differential pair or between signal and ground to clamp common-mode and differential-mode transients. Use Value: Maintains <1 μA leakage at 17 V standoff-ensuring minimal impact on precision current-loop accuracy while delivering 400 W surge absorption. |
| Consumer Power Adapter Input | Telecom Line Card Protection |
|
Use Scenario: Secondary-side DC output protection in wall adapters and USB PD chargers against ESD and fast transient bursts during plug insertion. IC Role / Device Role / Timing Role: Low-capacitance TVS placed after DC-DC converter output filter to suppress post-regulation transients without affecting regulation bandwidth. Use Value: Fast response time and 27.6 V clamping prevent overvoltage damage to connected mobile devices while supporting automated SMT placement via 7" tape-and-reel (61 code). |
Use Scenario: Front-end protection of Ethernet PHYs, DSL line drivers, or POTS interface ICs in telecom access equipment subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on line side of isolation transformer or coupled inductor to absorb energy before it couples into sensitive analog front-end. Use Value: 120 °C/W thermal resistance allows direct mounting on PCB copper pads-enabling compact, cost-effective protection without heatsinks or layout redesign. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ17CA-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated by OEM or regional regulations. | Choose SMAJ17CA-M3/61 if halogen-free bill-of-materials is required; otherwise SMAJ17CAHE3/61 offers same performance with broader supply chain availability. |
| SMBJ17CAHE3/61 | Same VWM/VBR/VC, but SMB (DO-214AA) package-30 % larger footprint and 600 W PPPM. | Higher surge capacity suits higher-energy threat environments (e.g., outdoor telecom cabinets); requires PCB layout change. | Select SMBJ17CAHE3/61 only when 600 W surge rating is needed; SMAJ17CAHE3/61 remains optimal for space-constrained automotive and portable designs. |
Compared with SMAJ17CA-M3/61, SMAJ17CAHE3/61 provides identical protection performance with standard RoHS compliance; versus SMBJ17CAHE3/61, it trades 200 W pulse power for 35 % smaller board area-making it the preferred choice for dense automotive PCBs where layout real estate and weight are critical.
Availability
SMAJ17CAHE3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial I/O protection, and consumer power adapter designs requiring stable component supply, AEC-Q101 assurance, and automated SMT compatibility.
Supply support for SMAJ17CAHE3/61 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 SMAJ series is engineered for high-reliability transient suppression in automotive, industrial, and communications systems-delivering consistent clamping performance, AEC-Q101 validation, and robust SMT manufacturability.
FAQ
What does the "CA" suffix indicate in SMAJ17CAHE3/61?
The "CA" suffix denotes a bidirectional configuration: SMAJ17CAHE3/61 has symmetrical clamping characteristics in both forward and reverse directions, unlike unidirectional "A" variants. This makes SMAJ17CAHE3/61 ideal for protecting AC-coupled signals, differential buses like RS-485, or any application where polarity reversal or floating references exist-without requiring external circuitry to manage directionality.
Is SMAJ17CAHE3/61 qualified for automotive applications?
Yes, SMAJ17CAHE3/61 is AEC-Q101 qualified-verified per the full stress test suite including high-temperature operating life, temperature cycling, unbiased highly accelerated stress test, and ESD (HBM/MM). The "HE3" suffix explicitly indicates this automotive-grade qualification, enabling its use in engine control units, ADAS camera modules, and body electronics where long-term reliability under thermal and mechanical stress is mandatory.
What is the maximum clamping voltage of SMAJ17CAHE3/61 under surge conditions?
The maximum clamping voltage (VC) of SMAJ17CAHE3/61 is 27.6 V at its rated peak pulse current (IPPM) of 14.5 A, measured with a 10/1000 μs waveform. This value represents the upper limit of voltage imposed on protected circuitry during worst-case surge events-critical for ensuring downstream components like microcontrollers or transceivers remain within their absolute maximum ratings.
How does the SMA (DO-214AC) package of SMAJ17CAHE3/61 compare to SMB (DO-214AA)?
The SMA package of SMAJ17CAHE3/61 measures 4.50 mm × 2.79 mm with 2.54 mm lead pitch, offering 35 % smaller footprint than SMB. While both share identical VWM and VBR, SMAJ17CAHE3/61 delivers 400 W PPPM versus 600 W for SMBJ variants. Use SMAJ17CAHE3/61 where board space is constrained (e.g., automotive ECUs); choose SMBJ only when higher surge energy handling justifies larger layout area.
What is the thermal resistance and power dissipation capability of SMAJ17CAHE3/61?
SMAJ17CAHE3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W. Its steady-state power dissipation (PD) is rated at 3.3 W at TA = 50 °C on infinite heatsink. These values enable reliable operation up to +150 °C junction temperature-supporting deployment in under-hood automotive zones and sealed industrial enclosures without forced cooling.
SMAJ17CAHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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):
- 14.5A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMA)
SMAJ17CAHE3/61 FAQ
1.How can I place an order for SMAJ17CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ17CAHE3/61 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 SMAJ17CAHE3/61 reliable?
The price and inventory of SMAJ17CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ17CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ17CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ17CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ17CAHE3/61?
SMAJ17CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ17CAHE3/61 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 SMAJ17CAHE3/61?
For technical support, including SMAJ17CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ17CAHE3/61 requirements.
6.How does Aetrix verify that SMAJ17CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ17CAHE3/61 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 SMAJ17CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ17CAHE3/61?
All SMAJ17CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ17CAHE3/61, 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 SMAJ17CAHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ17CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ17CAHE3/61 Tags
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