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Taiwan Semiconductor Corporation SMAJ6.0
- Part No.:
- SMAJ6.0
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.0.pdf
- Description:
- 400W, 7.4V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,321
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Product details
Overview
SMAJ6.0 from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for primary-side overvoltage protection in DC power rails. It features a 6.67–8.15 V breakdown voltage (VBR), 10 V working stand-off voltage (VWM), 35.1 V clamping voltage (VC) at 800 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform-ideal for protecting 5 V logic interfaces and low-voltage SMPS inputs.
For engineers reviewing the SMAJ6.0 datasheet, SMAJ6.0 pinout, SMAJ6.0 application, or SMAJ6.0 equivalent, key selection criteria include its DO-214AC (SMA) package compatibility, unidirectional polarity marking, sub-1 ps response time, <1 µA leakage at 10 V, and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance for automotive load-dump and inductive switching immunity.
Technical Context
The SMAJ6.0 operates as a silicon avalanche diode that enters controlled breakdown when reverse voltage exceeds its VBR range (6.67–8.15 V @ 10 mA), limiting transient energy by clamping to ≤35.1 V at 800 A. Its glass-passivated junction ensures stable leakage (<6 µA @ VWM) and long-term reliability under repeated surge stress.
Designed for single-pulse suppression only, it delivers 400 W peak power handling per 10/1000 µs waveform at 25°C, derating linearly above ambient temperature per Fig.2. The device is rated for -55°C to +150°C junction operation and meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT=10 mA | 6.67–8.15 V - defines minimum and maximum voltage at which avalanche conduction begins; sets lower bound of clamping window |
| VWM | 10 V - maximum continuous reverse operating voltage; must exceed system nominal rail (e.g., 5 V or 3.3 V bus) |
| VC @ IPPM=800 A | 35.1 V - clamped voltage during worst-case 10/1000 µs surge; determines protected circuit's maximum transient exposure |
| PPPM | 400 W - peak pulse power capability; validates suitability for ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2a (battery dump) |
| IR @ VWM | <6 µA - ultra-low reverse leakage ensures minimal standby power loss and signal integrity in high-impedance nodes |
| 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 on one end. Weight ≈0.060 g. Meets J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; forms return path during reverse-biased clamping event |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 5 V rail); conducts avalanche current when VIN > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Clamping performance | VC = 35.1 V @ 800 A ensures downstream 5 V ICs (e.g., microcontrollers, USB transceivers) remain within absolute maximum ratings during ESD/EFT events |
| Response speed | <1.0 ps rise-time enables suppression before sensitive logic thresholds are violated-critical for high-speed data lines and MCU reset circuits |
| Leakage control | IR <6 µA @ 10 V prevents measurable loading on precision analog sensors or battery-backed real-time clocks |
| Automated assembly support | Glass-passivated chip and J-STD-002-compliant terminations ensure reliable reflow soldering and zero tombstoning in high-volume SMT production |
| Automotive qualification | ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance certifies robustness against vehicle-level transients including alternator load dump and relay coil flyback |
Applications
| Switching Mode Power Supply (SMPS) Input Protection | USB Port ESD Protection |
|---|---|
Use Scenario: 5 V DC input stage of AC/DC adapter or DC/DC converter exposed to lightning-induced surges and hot-plug transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and ground to clamp positive-going transients before they reach primary-side controller IC. Use Value: 35.1 V clamping voltage protects 5 V-rated PWM controllers (e.g., UC3842, LM5021) without requiring series impedance or timing delays. |
Use Scenario: VBUS line of Type-A USB 2.0 port subjected to ±15 kV contact ESD per IEC 61000-4-2. IC Role / Device Role / Timing Role: Primary front-end surge limiter absorbing >90% of ESD energy before it reaches USB transceiver or host controller. Use Value: Sub-1 ps response and <6 µA leakage preserve signal integrity and prevent false disconnect detection during normal operation. |
| Automotive Body Control Module (BCM) Inputs | Industrial Sensor Interface Protection |
Use Scenario: 12 V supply rail feeding microcontroller I/O in door module, subject to ISO 7637-2 Pulse 1 (−150 V/2 Ω) and Pulse 2a (+100 V/50 Ω). IC Role / Device Role / Timing Role: Standoff protector on main power input, activated only during fault conditions to shunt surge current to chassis ground. Use Value: 400 W peak power rating sustains multiple ISO pulses without degradation; DO-214AC footprint allows compact placement near connector entry point. |
Use Scenario: 5 V analog sensor supply line (e.g., pressure, temperature) in factory automation PLC I/O module exposed to cable discharge events. IC Role / Device Role / Timing Role: Low-leakage transient clamp ensuring sensor output accuracy remains unaffected during quiescent state while surviving 4 kV EFT bursts. Use Value: 6 µA max leakage avoids offset errors in 24-bit delta-sigma ADC front-ends; 10/1000 µs waveform rating matches industrial surge test profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ6.0 | Identical VBR (6.67–8.15 V), same DO-214AC package, but specified IR ≤5 µA @ VWM vs. 6 µA for TSC unit | Same clamping performance (VC = 35.1 V @ 800 A); certified to AEC-Q200 Grade 2 for extended temperature cycling | Select for automotive-grade traceability and tighter leakage spec; requires validation of Littelfuse's PP400W derating curve vs. TSC's Fig.2 |
| ON Semiconductor SMAJ6.0 | VBR min 6.4 V (vs. 6.67 V), VC = 36.0 V @ 800 A (0.9 V higher), same 400 W rating and DO-214AC footprint | Marginally higher clamping may impact 5 V logic margin; qualified to J-STD-020 MSL Level 1 but lacks explicit ISO 7637-2 listing in public datasheet | Select when broader VBR tolerance is acceptable and ISO certification is not required; verify layout thermal relief for identical power dissipation |
Compared with Littelfuse and ON Semiconductor alternatives, the Taiwan Semiconductor SMAJ6.0 offers the tightest VBR lower bound (6.67 V), lowest published clamping voltage (35.1 V), and explicit ISO 7637-2 compliance-making it optimal for space-constrained 5 V systems where clamping margin and automotive qualification are critical.
Availability
SMAJ6.0 is available at Aetrix Electronics and suitable for switching mode power supplies, USB interface protection, and automotive body electronics requiring stable component supply across design-in, prototyping, and volume production phases.
Supply support for SMAJ6.0 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 for industrial, computing, and automotive markets.
The SMAJ series was developed specifically for high-reliability surface-mount transient suppression in harsh environments-emphasizing low clamping voltage, fast response, and robust packaging for automotive and industrial power rail protection.
FAQ
What is the maximum clamping voltage of the SMAJ6.0 under standard test conditions?
The SMAJ6.0 exhibits a maximum clamping voltage (VC) of 35.1 V when subjected to an 800 A peak pulse current with a 10/1000 µs waveform at 25°C ambient. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuitry during surge events-ensuring compatibility with 5 V logic families and USB physical layer components.
Is the SMAJ6.0 suitable for bidirectional transient protection?
No, the SMAJ6.0 is a unidirectional TVS diode intended for DC rail protection with defined polarity (cathode band marking). For bidirectional applications such as AC lines or differential data buses, the SMAJ6.0A variant-or dedicated bidirectional parts like SMAJ6.0CA-must be used, as the SMAJ6.0 lacks symmetrical breakdown characteristics in forward conduction.
Does the SMAJ6.0 meet automotive electromagnetic compatibility standards?
Yes, the SMAJ6.0 explicitly meets ISO 7637-2 requirements for Pulse 1 (inductive load dump), Pulse 2a (battery disconnection), Pulse 2b (alternator field decay), and Pulses 3a/3b (capacitive coupling), as confirmed in Taiwan Semiconductor's U2102 datasheet. This makes it suitable for non-safety-critical automotive ECUs without additional external filtering.
What is the thermal derating behavior of the SMAJ6.0 above 25°C ambient?
The SMAJ6.0's peak pulse power rating decreases linearly above 25°C ambient per Figure 2 in the datasheet: at 75°C, its 400 W rating drops to approximately 280 W; at 125°C, it falls to ~160 W. Designers must apply this derating curve when sizing PCB copper area and verifying thermal performance in enclosed or high-temperature enclosures.
Can the SMAJ6.0 be used in place of the SMAJ6.0A in a 5 V system?
No-the SMAJ6.0 has a higher VBR range (6.67–8.15 V) than the SMAJ6.0A (6.67–7.37 V), resulting in earlier conduction onset and potentially higher leakage at elevated temperatures. In a 5 V system with tight noise margins, the SMAJ6.0A's tighter VBR distribution reduces risk of premature clamping during normal operation, making direct substitution inadvisable without revalidation.
SMAJ6.0 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:
- 11.4V
- Current - Peak Pulse (10/1000µs):
- 35.1A
- 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)
SMAJ6.0 FAQ
1.How can I place an order for SMAJ6.0 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.0 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 SMAJ6.0 reliable?
The price and inventory of SMAJ6.0 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ6.0 is usually 5 days.
3.What payment methods are accepted for SMAJ6.0?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.0 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.0?
SMAJ6.0 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.0 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 SMAJ6.0?
For technical support, including SMAJ6.0 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.0 requirements.
6.How does Aetrix verify that SMAJ6.0 is sourced from the original manufacturer or authorized distributors?
All SMAJ6.0 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 SMAJ6.0 meets industry standards.
7.What is the process for return or replacement of SMAJ6.0?
All SMAJ6.0 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.0, 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 SMAJ6.0 part is unused and in its original packaging.
Return procedure for SMAJ6.0:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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