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Taiwan Semiconductor Corporation SMBJ17CA
- Part No.:
- SMBJ17CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17CA.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,980
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Product details
Overview
SMBJ17CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy ESD and surge protection in DC power rails and signal lines. It features a 17V working stand-off voltage (VWM), 20.0A peak pulse current (IPP), 30.5V maximum clamping voltage (VC@IPP) at 20A, and 600W peak pulse power (PPK) with <1.0ps response time - deployed in automotive infotainment power inputs and industrial I/O modules.
For engineers reviewing the SMBJ17CA datasheet, SMBJ17CA pinout, SMBJ17CA application, or SMBJ17CA equivalent, key selection criteria include bidirectional clamping symmetry, low leakage (<1µA @ 17V), ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and DO-214AA (SMB) package thermal performance (RθJA = 55°C/W).
Technical Context
The SMBJ17CA implements a silicon avalanche diode structure with glass-passivated junction for stable breakdown and low capacitance. Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating systems without polarity dependency.
It operates across -55°C to +150°C junction temperature range, supports 10/1000µs surge waveforms per ANSI/IEEE C62.35, and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous DC or RMS voltage the device blocks without conduction |
| VBR (min/max) | 18.9 / 23.1 V @ IT = 1 mA - Ensures reliable triggering above normal operating voltage with margin |
| VC@IPP | 30.5 V @ IPP = 20.0 A - Limits downstream voltage during 10/1000µs transients to safe IC levels |
| PPK | 600 W - Sustains high-energy surges typical of automotive load dump or inductive switching |
| ID@VWM | <1 µA - Negligible leakage in 17V rail applications, preserving standby power integrity |
| TJ max | +150 °C - Enables placement near heat sources in engine control units or motor drives |
Pinout & Package
DO-214AA (SMB) surface-mount package: 2-terminal, non-polarized bidirectional configuration; cathode band omitted (no polarity marking required); matte tin-plated leads; UL 94V-0 molding compound; 0.090g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as anode or cathode depending on transient polarity - no PCB orientation constraint |
| Case (exposed pad not present) | Non-conductive plastic body | No thermal pad or electrical connection - thermal path relies on soldered leads only |
Key Features
| Feature | Design Value |
|---|---|
| Fast response time | <1.0 ps - Clamps transients before sensitive logic or analog circuitry sustains damage |
| ISO 7637-2 compliance | Pulse 1/2a/2b/3a/3b validated - Certified for automotive battery line surge immunity per OEM requirements |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS - Supports green manufacturing and end-of-life recycling mandates |
| Junction-to-ambient RθJA | 55 °C/W - Enables thermal design with standard PCB copper area without forced air or heatsinks |
Applications
| Automotive Power Input Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery-fed ECUs exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp on main power rail upstream of DC-DC converters and microcontrollers. Use Value: Limits voltage to ≤30.5V during 600W surges, preventing latch-up or gate oxide rupture in downstream ICs. |
Use Scenario: 4–20mA current loop transmitters interfacing with field sensors in factory automation. IC Role / Device Role / Timing Role: Transient suppression at analog front-end input pins against EFT bursts and cable coupling. Use Value: Sub-1µA leakage avoids current loop accuracy degradation; 30.5V clamping protects op-amps and ADCs. |
| LED Driver Overvoltage Clamp | USB Port ESD Protection |
Use Scenario: Constant-current LED drivers in outdoor signage subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS across driver output to shunt overvoltage events. Use Value: 600W PPK rating handles repetitive surge energy without degradation; DO-214AA footprint fits compact LED module layouts. |
Use Scenario: USB 2.0 data lines in embedded host controllers exposed to human-body-model (HBM) ESD. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp on D+/D− lines adjacent to USB PHY. Use Value: Symmetrical clamping preserves differential signaling integrity; fast response prevents PHY latch-up during ±8kV contact discharge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ17CA | Same DO-214AC (SMA) package; slightly higher VC = 31.1V @ 20A; RθJA = 65°C/W | Lower power density due to larger thermal resistance - requires more PCB copper for same ambient temp rise | Select when SMA footprint is already standardized and minor clamping voltage increase is acceptable |
| ON Semiconductor 1.5SMC17CA | DO-214AB (SMC) package; 1.5kW PPK rating; VC = 27.6V @ 54.3A; higher IPP but larger footprint | Higher surge capacity suits heavy-duty industrial controls but occupies ~2.5× PCB area vs. SMBJ17CA | Select when system-level surge test levels exceed 600W and board space permits larger SMC outline |
Compared with SMAJ17CA and 1.5SMC17CA, SMBJ17CA delivers optimal balance of 600W surge handling, minimal 30.5V clamping, and compact DO-214AA footprint - making it preferred for space-constrained automotive and portable industrial designs where thermal resistance and layout density are critical.
Availability
SMBJ17CA is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, LED lighting drivers, and USB peripheral protection requiring stable component supply across extended temperature and surge environments.
Supply support for SMBJ17CA 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers with global AEC-Q200 qualified production lines.
The SMBJ series was engineered specifically for robust, surface-mount transient suppression in automotive and industrial environments - emphasizing low clamping voltage, high reliability under repeated surge stress, and JEDEC-compliant packaging.
FAQ
What is the clamping voltage of SMBJ17CA at its rated peak pulse current?
The SMBJ17CA has a maximum clamping voltage (VC) of 30.5 V when subjected to a 10/1000 µs surge waveform at its rated peak pulse current of 20.0 A. This value is measured per ANSI/IEEE C62.35 and ensures downstream components remain within safe operating voltage limits during transient events. The SMBJ17CA maintains this clamping performance across its full operating temperature range.
Is SMBJ17CA unidirectional or bidirectional, and how does that affect PCB layout?
SMBJ17CA is a bidirectional TVS diode, indicated by the "CA" suffix, meaning it provides symmetrical clamping in both polarities without polarity marking on the DO-214AA package. This eliminates orientation constraints during automated placement - either terminal may connect to any side of the protected line. The SMBJ17CA's non-polarized design simplifies layout for AC-coupled or floating signal paths.
Does SMBJ17CA meet automotive surge immunity standards?
Yes, SMBJ17CA is specified to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements for automotive electrical systems. Its 600W peak pulse power rating, fast <1.0 ps response, and stable breakdown behavior under repeated transients make it suitable for protecting ECUs, body control modules, and infotainment systems against battery-line disturbances and inductive switching noise.
What is the maximum leakage current of SMBJ17CA at its working voltage?
The SMBJ17CA exhibits a maximum blocking leakage current (ID) of less than 1 µA when biased at its 17 V working stand-off voltage (VWM) and tested at 25°C. This ultra-low leakage preserves power efficiency in always-on circuits such as automotive telematics or smart sensor nodes, and remains well within specification across its full -55°C to +150°C operating junction temperature range.
Can SMBJ17CA be used in place of SMBJ17A?
No - SMBJ17CA and SMBJ17A are functionally distinct: SMBJ17A is unidirectional (anode/cathode marked), while SMBJ17CA is bidirectional (no polarity marking). Substituting SMBJ17CA for SMBJ17A in a DC-biased circuit may cause unintended conduction. The SMBJ17CA must only replace other "CA"-suffixed variants or explicitly bidirectional designs verified for the target application's voltage polarity profile.
SMBJ17CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ17CA FAQ
1.How can I place an order for SMBJ17CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17CA 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 SMBJ17CA reliable?
The price and inventory of SMBJ17CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ17CA is usually 5 days.
3.What payment methods are accepted for SMBJ17CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17CA?
SMBJ17CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17CA 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 SMBJ17CA?
For technical support, including SMBJ17CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17CA requirements.
6.How does Aetrix verify that SMBJ17CA is sourced from the original manufacturer or authorized distributors?
All SMBJ17CA 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 SMBJ17CA meets industry standards.
7.What is the process for return or replacement of SMBJ17CA?
All SMBJ17CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17CA, 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 SMBJ17CA part is unused and in its original packaging.
Return procedure for SMBJ17CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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