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Taiwan Semiconductor Corporation SMAJ6.0H
- Part No.:
- SMAJ6.0H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.0H.pdf
- Description:
- 400W, 7.4V, UNIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:2,271
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Product details
Overview
SMAJ6.0H 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-optimized for automotive-grade switching mode power supplies and on-board DC/DC converters.
For engineers reviewing the SMAJ6.0H datasheet, SMAJ6.0H pinout, SMAJ6.0H application, or SMAJ6.0H equivalent, key selection criteria include its AEC-Q101 qualification, DO-214AC (SMA) package compatibility, sub-1 ps response time, <1 µA leakage at 10 V, and ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance for automotive transients.
Technical Context
The SMAJ6.0H operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its minimum breakdown threshold of 6.67 V at 10 mA test current. Its glass-passivated junction ensures stable clamping performance under repetitive surge stress, while its low dynamic impedance enables rapid energy diversion during fast-rising transients such as load dump or inductive switching spikes.
Designed for single-die configuration in DO-214AC (SMA) package, it supports automated placement and meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity. Polarity is marked by cathode band; forward voltage is 3.5 V at 25 A, confirming robust surge conduction capability without latch-up.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 6.67–8.15 V at 10 mA: defines reliable turn-on range before clamping begins |
| VWM | 10 V: maximum continuous DC or RMS voltage the device blocks without leakage exceeding 6 µA |
| VC @ IPPM | 35.1 V at 800 A: peak clamped voltage seen by protected circuit during 10/1000 µs surge |
| PPPM | 400 W (10/1000 µs): maximum non-repetitive surge power the device safely absorbs |
| IR @ VWM | <6 µA: ensures minimal standby power loss and signal integrity in high-impedance rails |
| TJ max | 150 °C: enables operation in under-hood automotive environments and thermally constrained PCB layouts |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, single-ended unidirectional configuration with cathode band marking. Matte tin-plated leads comply with J-STD-002 solderability requirements.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input reference node for transient path | Connected to protected line (e.g., +12 V rail); carries full surge current into cathode |
| Cathode | Clamping output / ground return | Connected to system ground or low-impedance return path; establishes clamping reference |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD |
| Fast response time <1.0 ps | Enables suppression of nanosecond-scale EFT and ESD events before downstream ICs experience overstress |
| Glass passivated junction | Ensures long-term reliability and stable VBR drift under thermal cycling and humidity exposure |
| ISO 7637-2 compliant | Meets Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) waveforms |
Applications
| Automotive Power Rail Protection | Industrial SMPS Input Stage |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump (up to 35 V, 100 ms) and jump-start surges. IC Role / Device Role / Timing Role: Primary clamping element placed directly across input terminals before DC/DC controller. Use Value: Limits voltage to ≤35.1 V during 800 A transients, preventing damage to LDOs and microcontrollers rated for 40 V absolute max. | Use Scenario: Safeguarding AC/DC adapter front-end rectifier outputs from lightning-induced surges and line switching spikes. IC Role / Device Role / Timing Role: Unidirectional TVS connected between rectified DC+ and ground, absorbing positive-going transients only. Use Value: Withstands 400 W peak pulses without degradation, enabling compact design versus multi-stage MOV+TVS solutions. |
| On-Board DC/DC Converter Input | LED Driver Supply Line |
Use Scenario: Securing 24 V input to isolated flyback controllers in commercial lighting control modules. IC Role / Device Role / Timing Role: Standoff-rated TVS placed upstream of input filter capacitor to clamp fast transients before filtering. Use Value: 10 V VWM allows full utilization of 24 V nominal rail while maintaining <6 µA leakage at operating voltage. | Use Scenario: Protecting constant-current LED drivers from reverse-polarity connection and hot-swap transients. IC Role / Device Role / Timing Role: Unidirectional clamping device installed between driver input and chassis ground. Use Value: 3.5 V forward voltage at 25 A enables safe conduction of reverse polarity faults without fuse activation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.0AH | Narrower VBR range (6.67–7.37 V) and lower VC (38.8 V), same package and PPPM | Better suited for tighter tolerance rails where clamping margin must be minimized | Select SMAJ6.0AH when system-level testing confirms lower clamping voltage improves downstream immunity without compromising surge margin |
| SMBJ6.0H | Same VBR/VC specs but in larger DO-214AA (SMB) package; higher thermal mass and 600 W PPPM | Preferred for higher ambient temperature or longer-duration surge profiles requiring greater thermal dissipation | Choose SMBJ6.0H when board layout allows larger footprint and application demands >400 W surge handling or extended derating above 25°C |
Compared with SMAJ6.0AH and SMBJ6.0H, the SMAJ6.0H delivers optimal balance of compact DO-214AC footprint, AEC-Q101 qualification, and 400 W surge capacity-making it ideal for space-constrained automotive and industrial DC/DC inputs where precise 10 V standoff and 35.1 V clamping are required.
Availability
SMAJ6.0H is available at Aetrix Electronics and suitable for automotive power rail protection, industrial SMPS input stages, and on-board DC/DC converter inputs requiring stable component supply, AEC-Q101 compliance, and consistent 10/1000 µs surge performance.
Supply support for SMAJ6.0H 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 components.
The SMAJ series is part of TSC's AEC-Q101-qualified transient suppression portfolio, engineered specifically for automotive and industrial power systems demanding high-reliability overvoltage protection with fast response and low leakage.
FAQ
What is the breakdown voltage range of the SMAJ6.0H?
The SMAJ6.0H has a guaranteed breakdown voltage (VBR) range of 6.67 V to 8.15 V at 10 mA test current, measured per JEDEC standards. This range ensures consistent turn-on behavior across production lots and temperature extremes, supporting reliable clamping in 12 V automotive and industrial power systems. The SMAJ6.0H maintains this specification under AEC-Q101 stress conditions including temperature cycling and high-temperature reverse bias.
Is the SMAJ6.0H suitable for bidirectional transient protection?
No-the SMAJ6.0H is a unidirectional TVS diode intended for protection against positive-going transients only. Its cathode band marking indicates polarity-sensitive installation. For bidirectional applications, TSC offers the SMAJ6.0CH or SMAJ6.0CAH variants, which provide symmetrical clamping in both directions. Using SMAJ6.0H in reverse-biased configurations may result in premature failure or undefined clamping behavior.
What is the maximum clamping voltage of the SMAJ6.0H under surge conditions?
The SMAJ6.0H exhibits a maximum clamping voltage (VC) of 35.1 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 represents the upper limit of voltage imposed on the protected circuit during worst-case surge events. Derating applies above 25°C per Fig.2 in the official datasheet, and actual VC remains stable due to glass-passivated junction construction.
Does the SMAJ6.0H meet automotive qualification standards?
Yes-the SMAJ6.0H is fully AEC-Q101 qualified and tested for automotive use, including stress tests for temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD). It also complies with ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient waveforms, making it suitable for engine control units, body electronics, and infotainment power supplies. The SMAJ6.0H is RoHS and halogen-free compliant per IEC 61249-2-21.
What packaging and reel quantity is available for the SMAJ6.0H?
The SMAJ6.0H is supplied in DO-214AC (SMA) package format on 7,500-piece tape-and-reel carriers, optimized for high-speed SMT placement equipment. Lead finish is matte tin per J-STD-002, and moisture sensitivity level is rated at Level 1 (unlimited floor life at ≤30°C/60% RH), eliminating bake requirements prior to reflow. The SMAJ6.0H marking code is "AF", visible adjacent to the cathode band on the device body.
SMAJ6.0H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ6.0H FAQ
1.How can I place an order for SMAJ6.0H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.0H 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 SMAJ6.0H reliable?
The price and inventory of SMAJ6.0H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ6.0H is usually 5 days.
3.What payment methods are accepted for SMAJ6.0H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.0H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.0H?
SMAJ6.0H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.0H 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 SMAJ6.0H?
For technical support, including SMAJ6.0H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.0H requirements.
6.How does Aetrix verify that SMAJ6.0H is sourced from the original manufacturer or authorized distributors?
All SMAJ6.0H 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 SMAJ6.0H meets industry standards.
7.What is the process for return or replacement of SMAJ6.0H?
All SMAJ6.0H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.0H, 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 SMAJ6.0H part is unused and in its original packaging.
Return procedure for SMAJ6.0H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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