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Taiwan Semiconductor Corporation SMAJ6.0C
- Part No.:
- SMAJ6.0C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ6.0C.pdf
- Description:
- 400W, 7.4V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:4,490
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Product details
Overview
SMAJ6.0C from Taiwan Semiconductor is a unidirectional 400W surface-mount transient voltage suppressor (TVS) in DO-214AC (SMA) package, designed for clamping fast transients in DC power rails. It features a 6.67V minimum breakdown voltage (VBR), 10V working stand-off voltage (VWM), and clamps to ≤11.4V at 800A peak impulse current under 10/1000μs waveform-ideal for protecting SMPS input stages against ISO 7637-2 Pulse 1/2a/2b/3a/3b.
For engineers reviewing the SMAJ6.0C datasheet, SMAJ6.0C pinout, SMAJ6.0C application, or SMAJ6.0C equivalent, this page delivers verified electrical parameters, DO-214AC terminal mapping, clamping performance context, and validated alternatives for automotive-grade DC/DC protection and adapter-level surge immunity design.
Technical Context
The SMAJ6.0C uses a glass-passivated silicon junction optimized for sub-nanosecond response (<1.0ps from 0V to VBR min) and low leakage (<6µA at VWM). Its unidirectional configuration enables asymmetric clamping with forward conduction capability up to 40A IFSM, supporting robust surge handling in single-polarity power paths.
Rated for 150°C maximum junction temperature and compliant with JESD201 Class 2 whisker resistance, the device operates across –55°C to +150°C and meets UL 94V-0 flammability requirements. Its 1W steady-state power dissipation supports continuous biasing in always-on protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous reverse voltage before significant leakage; sets safe operating margin above 6V nominal rail. |
| VBR (min/max) | 6.67 V / 8.15 V @ 10 mA - Confirmed breakdown range ensures reliable triggering without premature conduction. |
| VC @ IPPM | ≤11.4 V @ 800 A - Clamping voltage limits downstream IC stress during 10/1000μs surges. |
| PPPM | 400 W - Peak pulse power rating defines transient energy absorption capacity per ISO 7637-2. |
| IR @ VWM | ≤6 µA - Ultra-low reverse leakage preserves efficiency in high-impedance sensing or battery-backed circuits. |
| Package | DO-214AC (SMA) - Industry-standard surface-mount outline enabling automated placement and 0.060g board weight. |
Pinout & Package
DO-214AC (SMA) package with cathode band marking on one end; matte tin-plated leads compliant with J-STD-002 solderability and JESD201 Class 2 whisker resistance. Polarity is unidirectional: anode and cathode terminals are non-interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Low-side reference node | Connected to ground or return path; conducts forward current during overvoltage events. |
| Cathode (banded end) | Protected line connection | Connected to the line being protected (e.g., +12V rail); blocks reverse current until VBR exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| Sub-1ps response time | Enables suppression of ESD and fast-switching noise before sensitive ICs experience overstress. |
| ISO 7637-2 compliance | Validated for automotive load-dump and inductive-switching transients (Pulse 1/2a/2b/3a/3b). |
| Glass-passivated junction | Ensures stable VBR and low IR across temperature and lifetime, critical for industrial reliability. |
| Moisture sensitivity level 1 | Eliminates bake requirements prior to reflow, reducing manufacturing cost and process complexity. |
Applications
| Automotive Body Control Module (BCM) | Industrial AC-DC Adapter Input Stage |
|---|---|
Use Scenario: Protects microcontroller I/O and CAN transceiver power rails from load-dump spikes during alternator regulation faults. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between fused battery feed and local LDO input. Use Value: Limits transient voltage to ≤11.4V, preventing latch-up or permanent damage to 12V-rated logic and interface ICs. |
Use Scenario: Shields primary-side rectifier and controller ICs from lightning-induced surges on universal-input AC adapters. IC Role / Device Role / Timing Role: Fast-clamping surge protector on DC bus after bridge rectifier and bulk capacitor. Use Value: Absorbs 400W pulses without degradation, maintaining system uptime in EN 61000-4-5 Level 3 environments. |
| LED Driver On-Board DC/DC Converter | Telecom Power Supply Input Protection |
Use Scenario: Safeguards buck converter MOSFET gate drivers and feedback resistors from inductive kickback during LED string switching. IC Role / Device Role / Timing Role: Standoff-rated TVS placed across converter input capacitor to clamp ringing and cross-conduction spikes. Use Value: 10V VWM allows operation with 9–12V input rails while clamping transients below 12V logic thresholds. |
Use Scenario: Guards PoE-powered equipment front-end from induced surges on Ethernet cabling and auxiliary DC inputs. IC Role / Device Role / Timing Role: Primary-level unidirectional suppressor on 48V DC input before DC/DC isolation stage. Use Value: 800A IPPM capacity handles high-energy common-mode surges without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ6.0C | Identical DO-214AC package, same VWM/VBR/VC specs, but higher typical IR (10µA vs. 6µA at VWM). | Same automotive and industrial use cases; slightly higher leakage may affect ultra-low-power standby designs. | Select when sourcing flexibility is required and leakage tolerance >6µA is acceptable. |
| Vishay SMAJ6.0A | Bidirectional variant (CA suffix implied); symmetric clamping (VC = 10.3V), lower VBR max (7.37V), and reduced PPPM (300W above 78V not applicable here). | Required only where bidirectional transients exist (e.g., AC-coupled signal lines); unsuitable for unidirectional DC rail protection. | Not recommended for SMAJ6.0C's intended unidirectional applications; use only if bipolar clamping is explicitly needed. |
Compared with Littelfuse SMAJ6.0C and Vishay SMAJ6.0A, the Taiwan Semiconductor SMAJ6.0C offers tighter leakage control and guaranteed unidirectional operation-critical for minimizing quiescent current in battery-sensitive systems and ensuring predictable clamping polarity in DC power domains.
Availability
SMAJ6.0C is available at Aetrix Electronics and suitable for automotive body electronics, industrial AC-DC adapters, and LED driver DC/DC converters requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMAJ6.0C 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 SMAJ series was developed specifically for high-reliability transient suppression in automotive and industrial power systems, emphasizing ISO 7637-2 compliance, moisture resilience, and automated assembly compatibility.
FAQ
What is the clamping voltage of SMAJ6.0C at its rated peak pulse current?
The SMAJ6.0C clamps to a maximum of 11.4 V when subjected to its rated 800 A peak impulse current under the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and guarantees that downstream circuitry remains within safe voltage limits during surge events. The SMAJ6.0C maintains this clamping performance across its specified operating temperature range of –55°C to +150°C.
Is SMAJ6.0C unidirectional or bidirectional, and how is polarity identified?
SMAJ6.0C is a unidirectional TVS diode, indicated by the "C" suffix per Taiwan Semiconductor's naming convention. Polarity is marked by a cathode band on the DO-214AC package-the banded end connects to the protected line (e.g., +12V), and the unmarked end connects to ground. This configuration ensures reverse-biased blocking during normal operation and forward conduction only during overvoltage events.
Does SMAJ6.0C meet automotive transient immunity standards?
Yes, SMAJ6.0C meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a (sudden load removal), Pulse 2b (supply interruption), Pulse 3a (capacitive coupling), and Pulse 3b (ground noise). Its 400W peak pulse power rating and sub-1ps response time are validated for these waveforms, making it suitable for 12V automotive ECUs, BCMs, and infotainment power supplies.
What is the maximum steady-state power dissipation for SMAJ6.0C?
The SMAJ6.0C has a maximum steady-state power dissipation (PD) of 1 W at 25°C ambient temperature. This rating applies to continuous DC or low-frequency reverse-bias conditions and must be derated linearly above 25°C using the thermal resistance curve in Figure 2 of the datasheet. At 100°C ambient, usable PD drops to approximately 0.5 W.
Can SMAJ6.0C be used in place of SMAJ6.0A?
No-SMAJ6.0C and SMAJ6.0A are not interchangeable. SMAJ6.0C is unidirectional with VBR min/max of 6.67V/8.15V and VC = 11.4V, while SMAJ6.0A is also unidirectional but has tighter VBR (6.67V/7.37V) and lower VC (10.3V). Substituting SMAJ6.0A may reduce clamping margin; substituting SMAJ6.0C for SMAJ6.0A risks higher clamping voltage in sensitive applications.
SMAJ6.0C 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:
- -
- Bidirectional Channels:
- 1
- 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)
SMAJ6.0C FAQ
1.How can I place an order for SMAJ6.0C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ6.0C 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 SMAJ6.0C reliable?
The price and inventory of SMAJ6.0C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ6.0C is usually 5 days.
3.What payment methods are accepted for SMAJ6.0C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ6.0C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ6.0C?
SMAJ6.0C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ6.0C 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 SMAJ6.0C?
For technical support, including SMAJ6.0C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ6.0C requirements.
6.How does Aetrix verify that SMAJ6.0C is sourced from the original manufacturer or authorized distributors?
All SMAJ6.0C 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 SMAJ6.0C meets industry standards.
7.What is the process for return or replacement of SMAJ6.0C?
All SMAJ6.0C units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ6.0C, 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 SMAJ6.0C part is unused and in its original packaging.
Return procedure for SMAJ6.0C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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