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Taiwan Semiconductor Corporation SMAJ6.0A
- Part No.:
- SMAJ6.0A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.0A.pdf
- Description:
- TVS DIODE 6VWM 10.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,563
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Product details
Overview
SMAJ6.0A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping ESD and surge transients in DC power rails. It features 400W peak pulse power (10/1000μs), 10.3V maximum clamping voltage at 800A peak impulse current, and 6.67–7.37V breakdown voltage at 10mA test current - enabling robust protection of 5V–12V logic and power interfaces in industrial adapters and on-board DC/DC converters.
For engineers reviewing the SMAJ6.0A datasheet, SMAJ6.0A pinout, SMAJ6.0A application, or SMAJ6.0A equivalent, key selection criteria include its 10V working stand-off voltage, sub-1μA reverse leakage above VWM, 150°C junction temperature rating, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and unidirectional polarity marking for correct PCB orientation.
Technical Context
The SMAJ6.0A operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its specified breakdown range (6.67–7.37V) to divert transient energy away from protected circuitry. Its glass-passivated junction ensures stable VBR tolerance and low leakage, while fast response (<1.0ps) enables effective suppression of nanosecond-scale ESD events.
Designed for 10/1000μs waveform surges, it delivers 400W peak pulse power up to 78V VWM and derates linearly above 25°C ambient per Fig.2. The device is rated for 40A non-repetitive forward surge (8.3ms half-sine) and maintains clamping performance across -55°C to +150°C operating junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for safe DC rail operation. |
| VBR @ IT=10mA | 6.67–7.37 V - Breakdown voltage range defining turn-on threshold; ensures reliable triggering without premature conduction. |
| VC @ IPPM=800A | 10.3 V - Maximum clamped voltage during 400W transient; determines worst-case overvoltage seen by downstream ICs. |
| IR @ VWM | <6 μA - Reverse leakage at stand-off voltage; negligible power loss and no measurable impact on 5V/12V supply loading. |
| PPPM | 400 W (10/1000μs) - Peak surge handling capacity; sufficient for automotive load-dump and industrial switching noise. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in enclosed power supplies and high-ambient environments. |
| Package | DO-214AC (SMA) - Industry-standard surface-mount outline with cathode band marking; compatible with automated pick-and-place. |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (unidirectional configuration only). Weight ≈ 0.060g; meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return plane; completes clamping loop during transient events. |
| Cathode | Protected line connection / Surge input | Connected to the line being protected (e.g., 5V rail); reverse-biased under normal operation, avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures tight VBR tolerance (±5% typical), stable leakage, and long-term reliability under thermal cycling. |
| Clamping voltage ≤10.3V at 800A | Provides margin below 12V logic IC absolute maximum ratings, preventing latch-up or gate oxide damage. |
| Response time <1.0ps | Enables suppression of ultrafast ESD events (IEC 61000-4-2) before sensitive inputs are exposed. |
| ISO 7637-2 Pulse 1/2a/2b/3a/3b compliant | Validated for automotive electronics protection against battery transients, load dump, and inductive switching noise. |
| Moisture sensitivity level 1 (J-STD-020) | Allows unlimited floor life and standard reflow without baking; simplifies SMT manufacturing flow. |
Applications
| Switching Mode Power Supply (SMPS) | Industrial DC/DC Converter |
|---|---|
Use Scenario: Protection of primary-side MOSFET gate drivers and secondary-side rectifier outputs against flyback spikes and cross-conduction transients. IC Role / Device Role: Unidirectional TVS placed across input/output rails to clamp voltage overshoot during switching transitions. Use Value: Limits peak rail excursions to ≤10.3V, preserving MOSFET VGS and Schottky diode reverse breakdown margins. |
Use Scenario: Input surge suppression in isolated 24V-to-5V/3.3V buck-boost modules used in PLC I/O modules and sensor nodes. IC Role / Device Role: Standoff-rated TVS on VIN pin to absorb 400W load-dump pulses per ISO 7637-2 Pulse 5a. Use Value: Maintains regulated output stability by preventing upstream rail collapse or controller reset during 10/1000μs surges. |
| AC-DC Adapter Output Stage | LED Driver Power Input |
Use Scenario: Secondary-side overvoltage protection in universal-input 5V/9V/12V wall adapters subject to line surges and capacitor discharge transients. IC Role / Device Role: Clamping diode between output rail and GND, sized to handle repetitive 10/1000μs pulses without thermal runaway. Use Value: Guarantees <10.3V transient exposure to USB-PD sink ICs and load switches, meeting UL 62368-1 safety limits. |
Use Scenario: Input rail protection in constant-current LED drivers for street lighting and commercial fixtures exposed to lightning-induced surges. IC Role / Device Role: First-line defense against induced transients on 24–48V DC distribution lines feeding multiple driver units. Use Value: Absorbs 400W pulses without degradation, ensuring driver ICs remain functional after repeated 1kV/0.5kA surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.0 | Higher clamping voltage (11.4V vs. 10.3V) and wider VBR range (6.67–8.15V); same 400W rating and DO-214AC package. | Less margin for 5V logic protection; suitable where higher VC is acceptable and tighter VBR tolerance is not required. | Select SMAJ6.0A when lower clamping and tighter VBR control are critical for 5V system robustness. |
| SMBJ6.0A | Same electrical specs but in larger DO-214AA (SMB) package; 600W peak power rating (10/1000μs) and higher IFSM (100A). | Better thermal dissipation for high-duty-cycle surges; requires larger PCB footprint and different pad layout. | Choose SMBJ6.0A for designs needing higher surge endurance or operating near thermal limits; SMAJ6.0A preferred for space-constrained layouts. |
Compared with SMAJ6.0 and SMBJ6.0A, the SMAJ6.0A offers the lowest clamping voltage in the SMA footprint, making it optimal for protecting 5V interfaces where voltage margin is constrained - while SMBJ6.0A trades size for higher surge headroom, and SMAJ6.0 sacrifices clamping performance for broader VBR tolerance.
Availability
SMAJ6.0A is available at Aetrix Electronics and suitable for switching mode power supplies, industrial DC/DC converters, and AC-DC adapters requiring stable component supply with full traceability and lifecycle management.
Supply support for SMAJ6.0A 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, MOSFETs, and power management devices.
The SMAJ series was developed specifically for high-reliability, surface-mount transient suppression in automotive, industrial, and consumer power systems - emphasizing low clamping, fast response, and AEC-Q200 readiness.
FAQ
What is the maximum clamping voltage of the SMAJ6.0A under standard test conditions?
The SMAJ6.0A has a maximum clamping voltage (VC) of 10.3 V when subjected to an 800 A peak impulse current with a 10/1000 μs waveform. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring compatibility with 5V logic ICs and regulators. The SMAJ6.0A achieves this while maintaining 400W peak pulse power capability.
Is the SMAJ6.0A suitable for bidirectional transient protection?
No, the SMAJ6.0A is a unidirectional TVS diode and must be used with correct polarity - cathode connected to the line being protected, anode to ground. For bidirectional applications, the SMAJ6.0CA or SMAJ6.0A variant with 'CA' suffix is required. The SMAJ6.0A's electrical characteristics apply only in reverse bias; forward conduction follows standard diode behavior with VF ≤ 3.5 V at 25 A.
What is the working stand-off voltage (VWM) of the SMAJ6.0A, and why does it matter?
The SMAJ6.0A has a working stand-off voltage (VWM) of 10 V, meaning it remains non-conductive under normal operating conditions up to this DC or RMS voltage. This parameter ensures no leakage-related power loss or false triggering in 5V or 12V systems. Exceeding VWM risks premature clamping, so proper selection relative to system rail voltage is essential - the SMAJ6.0A is ideal for 5V rails with margin, not 12V continuous operation.
Does the SMAJ6.0A meet automotive transient immunity standards?
Yes, the SMAJ6.0A meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a (sudden load removal), Pulse 2b (alternator field decay), Pulse 3a (capacitive coupled noise), and Pulse 3b (battery line capacitance discharge). Its 400W rating, fast response, and 150°C junction rating make it suitable for front-end protection in automotive body control modules and infotainment power supplies - though system-level validation per ISO 16750 remains the designer's responsibility.
What packaging and moisture sensitivity level does the SMAJ6.0A have?
The SMAJ6.0A is supplied in DO-214AC (SMA) package on 7,500-piece tape-and-reel format and has a moisture sensitivity level (MSL) of Level 1 per J-STD-020 - meaning unlimited floor life at ≤30°C/60% RH and no baking required prior to reflow soldering. Its matte tin-plated leads comply with J-STD-002 for solderability, and the molding compound meets UL 94V-0 flammability rating - supporting high-yield, lead-free reflow processes.
SMAJ6.0A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- SMAJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 6V
- Voltage - Breakdown (Min):
- 6.67V
- Voltage - Clamping (Max) @ Ipp:
- 10.3V
- Current - Peak Pulse (10/1000µs):
- 38.8A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMA)
SMAJ6.0A FAQ
1.How can I place an order for SMAJ6.0A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.0A 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 SMAJ6.0A reliable?
The price and inventory of SMAJ6.0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ6.0A is usually 5 days.
3.What payment methods are accepted for SMAJ6.0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.0A?
SMAJ6.0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.0A 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 SMAJ6.0A?
For technical support, including SMAJ6.0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.0A requirements.
6.How does Aetrix verify that SMAJ6.0A is sourced from the original manufacturer or authorized distributors?
All SMAJ6.0A 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 SMAJ6.0A meets industry standards.
7.What is the process for return or replacement of SMAJ6.0A?
All SMAJ6.0A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.0A, 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 SMAJ6.0A part is unused and in its original packaging.
Return procedure for SMAJ6.0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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