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Taiwan Semiconductor Corporation SMBJ17CAH
- Part No.:
- SMBJ17CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17CAH.pdf
- Description:
- TVS DIODE 17VWM 27.6VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,308
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Product details
Overview
SMBJ17CAH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for automotive-grade ESD and surge protection in power rails and signal lines. It features a 17V working stand-off voltage (VWM), 18.9–20.9V breakdown voltage (VBR), 2.2A peak pulse current (IPP), 275V maximum clamping voltage (VC), and 600W peak pulse power rating under 10/1000µs waveform - deployed in lighting control modules and CAN bus interface protection.
For engineers reviewing the SMBJ17CAH datasheet, SMBJ17CAH pinout, SMBJ17CAH application, or SMBJ17CAH equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, low leakage (<1µA at 17V), and DO-214AA (SMB) package compatibility with automated SMT assembly.
Technical Context
The SMBJ17CAH operates as a silicon avalanche diode with glass-passivated junction, enabling sub-nanosecond response (<1.0ps) to fast transients while maintaining stable clamping across -55°C to +150°C junction temperature range. Its bidirectional configuration supports symmetrical voltage suppression in AC-coupled or floating signal paths without polarity dependency.
Thermal performance is defined by RθJC = 10°C/W and RθJA = 55°C/W, supporting reliable operation under repetitive surge conditions when mounted on standard 1-oz copper PCB pads. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 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 V / 20.9 V - Breakdown occurs within this range at 1 mA test current; defines turn-on threshold tolerance |
| VC @ IPP | 275 V - Clamped voltage during 2.2 A 10/1000µs surge; determines protected circuit's maximum overvoltage exposure |
| PPK | 600 W - Peak pulse power handling per single 10/1000µs transient; sets surge energy absorption limit |
| ID @ VWM | <1 µA - Leakage current at rated stand-off voltage; ensures minimal power loss and signal integrity in high-impedance circuits |
| Package | DO-214AA (SMB) - Standard surface-mount outline with cathode band marking; compatible with IPC-7351B footprint |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band. Weight ≈ 0.090 g. Meets UL 94V-0 flammability rating and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry terminal in forward bias; common reference for bidirectional clamping | Connected to line or signal node requiring protection; forms symmetrical clamp path with cathode |
| Cathode (banded end) | Current exit terminal in forward bias; polarity marker for unidirectional variants | Provides visual orientation during placement; in SMBJ17CAH, functions identically to anode under reverse bias due to bidirectional design |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood and body electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) waveforms without degradation |
| Fast response time | <1.0 ps - Limits voltage overshoot before protection engages, critical for safeguarding high-speed interfaces like LIN or CAN FD |
| Low moisture sensitivity | MSL Level 1 - No bake requirement prior to reflow; supports standard SMT assembly without special handling |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - suitable for green manufacturing and export-regulated markets |
Applications
| Automotive Lighting Control | CAN Bus Interface Protection |
|---|---|
Use Scenario: Protecting LED driver ICs and microcontrollers from load-dump surges and ESD events in headlamp and tail lamp modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rail (VBAT/GND) and signal lines (PWM dimming, LIN communication). Use Value: Clamps transients up to 275 V at 2.2 A, preventing latch-up or gate oxide damage in 3.3V/5V logic and MOSFET drivers. |
Use Scenario: Safeguarding CAN transceivers (e.g., TJA1042, SN65HVD230) against EFT and coupled noise in vehicle networking. IC Role / Device Role / Timing Role: Placed differentially across CANH/CANL lines and/or common-mode across CANH-GND/CANL-GND. Use Value: Sub-ns response ensures clamping occurs before transceiver input stages are overstressed; 275 V VC limits differential overvoltage below receiver absolute max ratings. |
| Industrial Sensor Signal Conditioning | Power Supply Input Stage Protection |
Use Scenario: Shielding analog front-end amplifiers and ADC inputs in pressure/temperature sensors exposed to motor drive noise. IC Role / Device Role / Timing Role: Low-capacitance (≈100 pF at 0 V) bidirectional clamp on sensor output lines referenced to system ground. Use Value: <1 µA leakage preserves signal integrity in µA-level sensor bias networks; 17 V VWM aligns with 12 V supply-referenced signal ranges. |
Use Scenario: Front-end surge suppression for 24 V industrial PLC power inputs subject to lightning-induced surges and switching spikes. IC Role / Device Role / Timing Role: Primary TVS stage before fuse, MOV, and L-C filtering; placed between input terminals and bulk capacitor. Use Value: 600 W PPK rating handles 10/1000 µs surges per IEC 61000-4-5 Level 3; DO-214AA footprint enables compact layout near connector entry point. |
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; 275 V VC @ 2.2 A; slightly higher RθJA (65°C/W) | Lower power density due to smaller thermal mass; less suitable for sustained surge duty cycles | Preferred where board space is constrained but thermal margin exists |
| ON Semiconductor 1.5SMC17CA | DO-214AB (SMC) package; 275 V VC @ 2.2 A; 1.5 kW PPK rating; higher VBR tolerance (18.9–22.1 V) | Higher surge capacity but larger footprint; requires revised pad layout and stencil | Chosen when system-level surge testing exceeds 600 W single-pulse requirement |
Compared with SMBJ17CAH, SMAJ17CA offers identical electrical clamping but reduced thermal robustness in high-ambient environments, while 1.5SMC17CA provides greater surge headroom at the cost of PCB area and assembly compatibility.
Availability
SMBJ17CAH is available at Aetrix Electronics and suitable for automotive lighting control, CAN bus interface protection, and industrial sensor signal conditioning requiring stable component supply, AEC-Q101 compliance, and ISO 7637-2 immunity assurance.
Supply support for SMBJ17CAH 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, rectifiers, and MOSFETs, with global distribution and AEC-Q101 validation capabilities.
The SMBJH series was developed specifically for automotive and industrial transient suppression, emphasizing reliability under harsh thermal and electrical stress, automated assembly compatibility, and compliance with ISO 7637-2 and AEC-Q101 standards.
FAQ
What is the polarity configuration of SMBJ17CAH?
SMBJ17CAH is a bidirectional TVS diode, meaning it provides symmetrical clamping for both positive- and negative-going transients without requiring orientation during PCB placement. The cathode band marking is retained for consistency with unidirectional variants but does not affect functional polarity - both terminals behave identically under reverse bias. This simplifies layout in AC-coupled or floating signal paths.
Does SMBJ17CAH meet automotive qualification standards?
Yes, SMBJ17CAH is AEC-Q101 qualified and tested per the full stress test schedule including high-temperature operating life (HTOL), temperature cycling (TCT), and human-body-model ESD (HBM). It also meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements, making it suitable for use in automotive body electronics, lighting, and infotainment systems.
What is the maximum clamping voltage of SMBJ17CAH under surge conditions?
The maximum clamping voltage (VC) of SMBJ17CAH is 275 V when subjected to a 10/1000 µs surge waveform with a peak current (IPP) of 2.2 A. This value is guaranteed across the full operating temperature range and represents the highest voltage that will appear across the protected circuit during a standardized transient event.
Can SMBJ17CAH be used in place of a unidirectional TVS like SMBJ17H?
No - SMBJ17CAH is electrically and mechanically distinct from unidirectional variants such as SMBJ17H. While both share the same VWM (17 V) and package (DO-214AA), SMBJ17CAH has bidirectional breakdown behavior and lacks forward-voltage (VF) specification. Substituting it for SMBJ17H in DC-biased applications may result in unintended conduction or insufficient forward surge handling.
What is the leakage current specification for SMBJ17CAH at its working voltage?
SMBJ17CAH exhibits a maximum blocking leakage current (ID) of 1 µA when biased at its rated working stand-off voltage (VWM) of 17 V and measured at 25°C. This low leakage ensures minimal power loss in battery-powered systems and preserves signal integrity in high-impedance sensor interfaces.
SMBJ17CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJH
- 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):
- 22.8A
- 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 (SMB)
SMBJ17CAH FAQ
1.How can I place an order for SMBJ17CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17CAH 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 SMBJ17CAH reliable?
The price and inventory of SMBJ17CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ17CAH is usually 5 days.
3.What payment methods are accepted for SMBJ17CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17CAH?
SMBJ17CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17CAH 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 SMBJ17CAH?
For technical support, including SMBJ17CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17CAH requirements.
6.How does Aetrix verify that SMBJ17CAH is sourced from the original manufacturer or authorized distributors?
All SMBJ17CAH 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 SMBJ17CAH meets industry standards.
7.What is the process for return or replacement of SMBJ17CAH?
All SMBJ17CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17CAH, 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 SMBJ17CAH part is unused and in its original packaging.
Return procedure for SMBJ17CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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