My Inquiry
My Account
Taiwan Semiconductor Corporation SMBJ17C
- Part No.:
- SMBJ17C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ17C.pdf
- Description:
- 600W, 21V, 10%, BIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:4,191
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ17C from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 17V working stand-off voltage (VWM), 18.9–23.1V breakdown voltage (VBR @ 1mA), and 30.5V maximum clamping voltage (VC @ 20A). It protects automotive and industrial power rails against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMBJ17C datasheet, SMBJ17C pinout, SMBJ17C application, or SMBJ17C equivalent, key selection criteria include clamping performance under 10/1000µs surge, leakage current at 17V (<1µA), unidirectional polarity marking, and compliance with J-STD-020 Level 1 moisture sensitivity.
Technical Context
The SMBJ17C uses a glass-passivated silicon junction optimized for fast transient suppression, achieving sub-1ps response time and low dynamic impedance. Its unidirectional configuration provides forward conduction capability with VF = 3.5V at 50A (per SMBJ5.0–SMBJ90 group specification).
Thermal design is supported by RθJC = 10°C/W and RθJA = 55°C/W, enabling reliable operation up to TJ = +150°C. The device meets IEC 61249-2-21 halogen-free and RoHS requirements, with matte tin-plated leads solderable per J-STD-002.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 17 V - Maximum continuous DC or RMS voltage the device blocks without clamping |
| VBR min/max | 18.9 / 23.1 V @ 1 mA - Confirmed breakdown range ensures robust turn-on margin above VWM |
| VC @ IPP | 30.5 V @ 20 A - Clamping voltage during 10/1000µs surge defines peak system overvoltage exposure |
| PPK | 600 W - Peak pulse power rating determines survivability of standardized transient waveforms |
| ID @ VWM | <1 µA - Low leakage preserves signal integrity and minimizes standby power loss |
| Response time | <1.0 ps - Enables protection of high-speed interfaces and microcontroller I/O against ESD/EFT |
| Polarity | Unidirectional - Cathode band marked; supports DC-biased rail protection with forward conduction |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, single-die unidirectional TVS diode with cathode band marking. Dimensions conform to JEDEC DO-214AA standard; weight ≈ 0.090 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes clamping loop during transient events |
| Cathode | High-side connection point | Marked with band; connects to protected line (e.g., 12V rail); conducts when line exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR and low leakage across temperature and long-term operation |
| ISO 7637-2 compliance | Validated for automotive load-dump and switching transient immunity (Pulse 1/2a/2b/3a/3b) |
| J-STD-020 Level 1 | Enables standard reflow assembly without moisture-related popcorning or delamination |
| UL 94V-0 molding compound | Provides flame-retardant encapsulation required for industrial and transportation end equipment |
| Matte tin plating | Guarantees solderability and intermetallic reliability per J-STD-002 for lead-free processes |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery-supplied ECUs exposed to load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and local regulator to clamp surges before they reach downstream ICs. Use Value: Limits peak voltage to ≤30.5V during 10/1000µs pulses, preventing damage to 3.3V/5V logic and CAN transceivers. |
Use Scenario: 4–20mA current-loop sensors in factory automation subject to EFT bursts. IC Role / Device Role / Timing Role: SMBJ17C installed across sensor supply terminals to shunt fast transients (<1ps response) before reaching analog front-end. Use Value: Maintains <1µA leakage at 17V, avoiding interference with precision current measurement accuracy. |
| LED Driver Overvoltage Clamp | DC Motor Control Board Surge Suppression |
Use Scenario: Constant-current LED drivers powered from 24V industrial supplies experiencing inductive kickback. IC Role / Device Role / Timing Role: Placed across driver input to absorb energy from back-EMF spikes during MOSFET switching. Use Value: 600W PPK rating sustains repeated 10/1000µs surges without degradation, extending board lifetime. |
Use Scenario: H-bridge motor control PCBs where relay or contactor switching induces high-voltage transients on power rails. IC Role / Device Role / Timing Role: Mounted near power entry to clamp induced spikes before reaching gate drivers and MCU power pins. Use Value: Cathode-band polarity ensures correct orientation for DC bus protection; DO-214AA footprint enables high-density layout. |
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 SMAJ17A | Same DO-214AC (SMA) package; lower PPK (400W); VC = 27.7V @ 21.7A | Lower surge capacity limits use in high-energy automotive load dump scenarios | Select when space constraints favor SMA footprint and surge energy is ≤400W |
| ON Semiconductor SMCJ17A | DO-214AB (SMC) package; higher PPK (1500W); VC = 27.6V @ 54.3A | Larger footprint and higher clamping current suit heavy-duty industrial motor drives | Choose for systems requiring >600W surge handling and thermal derating margin |
Compared with SMBJ17C, SMAJ17A offers smaller size but reduced surge robustness, while SMCJ17A delivers higher power handling at the cost of larger PCB area-making SMBJ17C the optimal balance of 600W capability, SMB footprint, and automotive-grade transient immunity.
Availability
SMBJ17C is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor modules, LED lighting drivers, and DC motor control boards requiring stable component supply and consistent surge protection performance.
Supply support for SMBJ17C 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power devices since 1979.
The SMBJ series was designed specifically for surface-mount transient suppression in automotive and industrial environments, emphasizing ISO 7637-2 compliance, low leakage, and robust thermal performance in compact DO-214AA packaging.
FAQ
What is the maximum clamping voltage of SMBJ17C under standard test conditions?
The SMBJ17C has a maximum clamping voltage (VC) of 30.5 V when subjected to a 10/1000 µs surge current of 20 A, as specified in the Electrical Specifications table. This value defines the upper voltage limit imposed on protected circuitry during transient events and is critical for ensuring downstream ICs remain within safe operating voltage ranges.
Is SMBJ17C unidirectional or bidirectional, and how is polarity indicated?
SMBJ17C is a unidirectional TVS diode, with polarity indicated by a cathode band marked on the DO-214AA (SMB) package body. The cathode terminal connects to the protected line (e.g., 12V rail), while the anode connects to ground-enabling forward conduction during overvoltage events and blocking normal operating voltage.
Does SMBJ17C meet automotive transient immunity standards?
Yes, SMBJ17C meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (EFT), making it suitable for 12V/24V automotive electronic control units, body electronics, and infotainment power inputs.
What is the leakage current specification for SMBJ17C at its working voltage?
At its 17 V working stand-off voltage (VWM), SMBJ17C exhibits a maximum blocking leakage current (ID) of 1 µA, measured at TA = 25°C. This low leakage ensures minimal impact on power rail stability and avoids false triggering in high-impedance sensing circuits.
Can SMBJ17C be used in lead-free reflow soldering processes?
Yes, SMBJ17C features matte tin-plated leads compliant with J-STD-002 and is rated for moisture sensitivity level (MSL) 1 per J-STD-020, allowing direct placement into standard lead-free reflow profiles without baking or special handling.
SMBJ17C 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:
- 30.5V
- Current - Peak Pulse (10/1000µs):
- 20A
- 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)
SMBJ17C FAQ
1.How can I place an order for SMBJ17C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ17C 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 SMBJ17C reliable?
The price and inventory of SMBJ17C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ17C is usually 5 days.
3.What payment methods are accepted for SMBJ17C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ17C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ17C?
SMBJ17C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ17C 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 SMBJ17C?
For technical support, including SMBJ17C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ17C requirements.
6.How does Aetrix verify that SMBJ17C is sourced from the original manufacturer or authorized distributors?
All SMBJ17C 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 SMBJ17C meets industry standards.
7.What is the process for return or replacement of SMBJ17C?
All SMBJ17C units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ17C, 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 SMBJ17C part is unused and in its original packaging.
Return procedure for SMBJ17C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ17C 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
