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Taiwan Semiconductor Corporation SMBJ10A
- Part No.:
- SMBJ10A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ10A.pdf
- Description:
- TVS DIODE 10VWM 17VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:15,147
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Product details
Overview
SMBJ10A from Taiwan Semiconductor is a unidirectional 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 10 V working stand-off voltage (VWM), 17.0 V maximum clamping voltage (VC@IPP) at 37 A peak pulse current, and 600 W peak pulse power rating with <1.0 ps response time - deployed in automotive body electronics, industrial I/O modules, and LED driver input stages.
For engineers reviewing the SMBJ10A datasheet, SMBJ10A pinout, SMBJ10A application, or SMBJ10A equivalent, key selection criteria include clamping voltage margin relative to protected IC VCC, leakage current at operating voltage, unidirectional polarity marking, and DO-214AA (SMB) package thermal performance under repetitive surge conditions.
Technical Context
The SMBJ10A operates as a silicon avalanche diode that remains non-conductive below its 11.1–12.3 V breakdown voltage (VBR@IT = 1 mA), then rapidly transitions to low-impedance conduction during transients exceeding VWM. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<5 µA at 10 V).
Thermal design relies on RθJA = 55 °C/W and RθJC = 10 °C/W, enabling sustained operation up to TJ = 150 °C. It meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and inductive-switching immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous reverse voltage before significant leakage; sets upper limit for protected circuit operating voltage. |
| VBR min/max | 11.1 / 12.3 V @ 1 mA - Confirmed breakdown range ensures reliable turn-on margin above VWM without premature conduction. |
| VC@IPP | 17.0 V @ 37 A - Clamping voltage during 10/1000 µs surge defines worst-case overvoltage seen by downstream ICs. |
| PPK | 600 W - Peak pulse power handling capacity per single 10/1000 µs waveform, derated above 25°C ambient. |
| ID@VWM | <5 µA - Low blocking leakage preserves battery life and avoids false triggering in high-impedance sensing circuits. |
| TJ max | +150 °C - Maximum junction temperature supports operation in under-hood automotive or enclosed industrial enclosures. |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with 2.59 mm height and 4.57 mm length; compatible with automated pick-and-place. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, cathode band marking polarity, moisture sensitivity level 1 (per J-STD-020), UL 94V-0 rated compound, and 0.090 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; forms return path during clamping event. |
| Cathode | High-side transient capture terminal | Connected to protected line (e.g., 12 V rail); conducts surge current to ground when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5% typical), low parameter drift over temperature, and long-term reliability in humid environments. |
| Clamping voltage ≤17.0 V at 37 A | Provides ≥3 V margin below typical 20 V absolute maximum rating of 12 V system microcontrollers and CAN transceivers. |
| Response time <1.0 ps | Fast enough to suppress ESD events (IEC 61000-4-2) and fast electrical fast transients (IEC 61000-4-4) before IC damage occurs. |
| RoHS & halogen-free compliance | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally restricted substances in final assembly. |
| ISO 7637-2 certified | Validated for automotive-level load dump (Pulse 5a/5b), inductive switching (Pulse 1/2a/2b), and EFT (Pulse 3a/3b) immunity testing. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12 V supply rail of BCM against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between fused 12 V input and local LDO regulator input. Use Value: Limits transient voltage to ≤17.0 V, preventing latch-up or gate oxide damage in 20 V-rated power management ICs. |
Use Scenario: Shielding 24 V digital input channels from inductive kickback of solenoid valves. IC Role / Device Role / Timing Role: TVS connected across input terminals upstream of optocoupler or Schmitt trigger interface. Use Value: Absorbs 600 W surges with sub-nanosecond response, maintaining signal integrity and avoiding false edge detection. |
| LED Driver Power Input Stage | USB-C Port VBUS Line Protection |
Use Scenario: Safeguarding constant-current LED driver ICs from 12–24 V supply transients. IC Role / Device Role / Timing Role: Unidirectional TVS mounted at DC jack entry point before bulk capacitor and controller. Use Value: Clamps 10/1000 µs surges to 17.0 V, staying within 80% of typical 24 V LED driver IC VDD absolute max rating. |
Use Scenario: Secondary-level overvoltage protection on USB-C VBUS line after primary buck converter. IC Role / Device Role / Timing Role: TVS placed between VBUS and GND downstream of E-Marker IC and upstream of PD controller. Use Value: Withstands 5 µA leakage at 10 V, minimizing standby power loss while clamping ESD to safe levels for USB PD PHY. |
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 SMAJ10A | Same DO-214AC (SMA) package; slightly higher VC@IPP = 17.5 V at 36.5 A; VBR range 11.1–12.8 V. | Lower PPK (400 W vs. 600 W); less suitable for high-energy automotive load dump. | Preferred where board space allows SMA footprint and energy requirements are moderate. |
| ON Semiconductor SMCJ10A | DO-214AB (SMC) package; larger footprint; VC@IPP = 17.0 V at 35.0 A; same VBR range. | Higher thermal mass enables better repetitive surge endurance but requires more PCB area. | Chosen when long-term reliability under frequent surge stress outweighs size constraints. |
Compared with SMBJ10A, SMAJ10A offers smaller footprint but reduced surge capability, while SMCJ10A delivers identical clamping performance with superior thermal robustness at the cost of board area - making SMBJ10A the optimal balance of 600 W rating, SMB package size, and automotive-grade qualification.
Availability
SMBJ10A is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and LED lighting applications requiring stable component supply, consistent parametric performance, and full traceability through manufacturing lots.
Supply support for SMBJ10A 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-Q200 qualified product lines.
The SMBJ series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing low clamping voltage, fast response, and robust packaging for automated SMT assembly.
FAQ
What is the maximum clamping voltage of SMBJ10A under standard test conditions?
The SMBJ10A has a maximum clamping voltage (VC@IPP) of 17.0 V when subjected to a 10/1000 µs surge waveform at 37 A peak current, measured per ANSI/IEEE C62.35. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events.
Is SMBJ10A unidirectional or bidirectional, and how is polarity marked?
SMBJ10A is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix. Polarity is marked by a cathode band on the DO-214AA (SMB) package body - the banded end connects to the protected line, while the anode connects to ground. Bidirectional variants (e.g., SMBJ10CA) are separate part numbers.
Does SMBJ10A meet automotive surge immunity standards?
Yes, SMBJ10A meets ISO 7637-2 Pulse 1 (inductive switch-off), Pulse 2a/2b (battery connection/disconnection), and Pulse 3a/3b (EFT) requirements. Its 600 W peak power rating, 150 °C junction rating, and glass-passivated construction support AEC-Q200 alignment for automotive body electronics applications.
What is the leakage current specification for SMBJ10A at its working voltage?
At its 10 V working stand-off voltage (VWM), SMBJ10A exhibits a maximum blocking leakage current (ID@VWM) of 5 µA at 25 °C. This low leakage ensures minimal impact on battery-powered systems and high-impedance sensor interfaces, supporting energy-efficient designs without compromising protection integrity.
Can SMBJ10A be used in place of SMBJ10 without redesigning the PCB?
Yes, SMBJ10A and SMBJ10 share identical DO-214AA (SMB) package dimensions, pinout, and thermal characteristics. The "A" suffix denotes tighter VBR tolerance (11.1–12.3 V vs. 11.1–13.6 V), lower clamping voltage (17.0 V vs. 18.8 V), and improved consistency - enabling drop-in replacement with enhanced protection margin.
SMBJ10A 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 35.3A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- Yes
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ10A FAQ
1.How can I place an order for SMBJ10A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ10A 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 SMBJ10A reliable?
The price and inventory of SMBJ10A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ10A is usually 5 days.
3.What payment methods are accepted for SMBJ10A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ10A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ10A?
SMBJ10A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ10A 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 SMBJ10A?
For technical support, including SMBJ10A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ10A requirements.
6.How does Aetrix verify that SMBJ10A is sourced from the original manufacturer or authorized distributors?
All SMBJ10A 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 SMBJ10A meets industry standards.
7.What is the process for return or replacement of SMBJ10A?
All SMBJ10A units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ10A, 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 SMBJ10A part is unused and in its original packaging.
Return procedure for SMBJ10A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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