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Taiwan Semiconductor Corporation SMAJ5.0C
- Part No.:
- SMAJ5.0C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ5.0C.pdf
- Description:
- 400W, 6.9V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:5,451
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Product details
Overview
SMAJ5.0C 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 5.0V working stand-off voltage (VWM), 6.4–7.3V breakdown voltage (VBR) at 10mA test current, and clamps transients to ≤41.7V at 800A peak impulse current under 10/1000μs waveform - enabling robust ESD and surge immunity in compact SMPS and adapter designs.
For engineers reviewing the SMAJ5.0C datasheet, SMAJ5.0C pinout, SMAJ5.0C application, or SMAJ5.0C equivalent, key selection criteria include its DO-214AC (SMA) package compatibility, bidirectional-capable variants (SMAJ5.0CA), ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and 400W peak pulse power rating with sub-1ps response time.
Technical Context
The SMAJ5.0C employs a glass-passivated silicon junction optimized for fast transient suppression in low-voltage DC systems. Its clamping behavior is defined by a tightly controlled VBR range (6.4–7.3V) and low dynamic impedance, delivering VC = 41.7V at IPPM = 800A with <1.0ps response from 0V to VBR min.
It operates across -55°C to +150°C junction temperature, supports 1W steady-state dissipation, and exhibits IR <5μA at VWM = 5.0V - ensuring minimal leakage in always-on power monitoring paths while maintaining high immunity to repetitive surges per Fig.2 derating curves.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 5.0 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected rail voltage. |
| VBR @ IT=10mA | 6.4–7.3 V - Breakdown onset range; ensures reliable triggering above nominal 5V supply with margin against tolerance drift. |
| VC @ IPPM=800A | 41.7 V - Clamped voltage during 10/1000μs surge; defines worst-case stress on downstream ICs. |
| PPPM | 400 W - Peak pulse power handling (10/1000μs); enables protection against automotive load-dump and ISO 7637-2 pulses. |
| IR @ VWM | <5 μA - Reverse leakage at rated stand-off; guarantees negligible quiescent current draw in battery-backed or energy-sensitive circuits. |
| Package | DO-214AC (SMA) - Surface-mount outline with 0.060g mass; compatible with standard reflow profiles and automated placement. |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band; meets UL 94V-0 flammability and JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or return path; forms current sink during transient clamp event. |
| Cathode | High-side input terminal | Connected to protected line (e.g., +5V rail); conducts avalanche current when VAK exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Sub-1ps response time | Enables suppression of ESD events (IEC 61000-4-2) before sensitive logic inputs are damaged. |
| 400W peak pulse power (10/1000μs) | Meets ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2a (battery disconnect) requirements for automotive ECUs. |
| Moisture sensitivity level 1 | Eliminates bake-out requirement prior to reflow; supports standard SMT assembly without special handling. |
| RoHS & halogen-free compliance | Fulfills IPC/JEDEC industry standards for green electronics manufacturing and end-of-life recyclability. |
Applications
| Switching Mode Power Supply (SMPS) | USB-C Adapter Input Stage |
|---|---|
Use Scenario: Protection of primary-side rectifier output against line surges and transformer ringing. IC Role / Device Role / Timing Role: Unidirectional TVS placed between rectified DC bus and ground to clamp positive transients. Use Value: Limits voltage excursion to ≤41.7V during 800A surge, preventing damage to PWM controller and MOSFET gate drivers. |
Use Scenario: Input rail protection in compact USB PD adapters subject to AC mains coupling and hot-plug transients. IC Role / Device Role / Timing Role: Standoff-rated suppressor on 5V input path, activated only during >6.4V overvoltage events. Use Value: Maintains <5μA leakage at 5.0V, preserving no-load efficiency while surviving 400W surges per IEC 61000-4-5. |
| Automotive Body Control Module (BCM) | Industrial DC/DC Converter Input |
Use Scenario: CAN/LIN bus power rail protection in vehicle interior modules exposed to battery dump and load-switch noise. IC Role / Device Role / Timing Role: Primary surge limiter on 5V auxiliary supply derived from 12V battery. Use Value: Complies with ISO 7637-2 Pulse 2b (alternator load dump) and Pulse 3b (capacitive discharge), clamping within 1ps. |
Use Scenario: Input-stage transient suppression in isolated 5V-to-3.3V converters used in PLC I/O modules. IC Role / Device Role / Timing Role: Fast-acting shunt device across input capacitor to prevent overvoltage propagation to isolation barrier. Use Value: Delivers 41.7V clamping at 800A with DO-214AC footprint - enabling layout reuse across 5–188V SMAJ family variants. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0A | Narrower VBR range (6.4–7.0V) and lower clamping voltage (VC = 43.5V @ 800A). | Preferred where tighter breakdown tolerance and slightly higher clamping margin are acceptable. | Select SMAJ5.0A if system-level testing confirms 43.5V clamping remains within downstream IC absolute maximum ratings. |
| SMBJ5.0 | Same VWM/VBR specs but in larger DO-214AA (SMB) package; 600W PPPM rating. | Used where higher surge margin or thermal derating headroom is required in space-tolerant designs. | Choose SMBJ5.0 only if PCB layout allows SMB footprint and 600W surge capability is explicitly needed beyond ISO 7637-2 requirements. |
Compared with SMAJ5.0A and SMBJ5.0, the SMAJ5.0C offers the tightest balance of 5.0V stand-off fidelity, 400W surge capacity, and DO-214AC space efficiency - making it optimal for high-density consumer and automotive power supplies where leakage, response speed, and footprint are co-constrained.
Availability
SMAJ5.0C is available at Aetrix Electronics and suitable for switching mode power supplies, USB-C adapters, and automotive body control modules requiring stable component supply with full traceability and lifecycle continuity.
Supply support for SMAJ5.0C 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 protection devices for industrial and automotive markets.
The SMAJ series was developed specifically for surface-mount surge immunity in compact DC power systems, emphasizing fast response, low leakage, and AEC-Q200 readiness across voltage grades from 5.0V to 188V.
FAQ
What is the maximum clamping voltage of the SMAJ5.0C under standard surge conditions?
The SMAJ5.0C clamps to a maximum of 41.7 V when subjected to an 800 A peak impulse current with a 10/1000 μs waveform. This value is measured per JEDEC-standard test conditions and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Does the SMAJ5.0C meet automotive surge immunity standards?
Yes, the SMAJ5.0C meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for transient immunity in 12 V automotive electrical systems. Its 400 W peak pulse power rating, sub-1 ps response time, and specified clamping performance under standardized waveforms make it suitable for body control modules, infotainment power supplies, and other non-safety-critical vehicle subsystems.
Is the SMAJ5.0C unidirectional or bidirectional?
The SMAJ5.0C is a unidirectional TVS diode, indicated by the absence of "CA" suffix and confirmed by its single cathode band marking. It protects against positive transients only - reverse voltage beyond its VWM (5.0 V) will not trigger conduction unless a bidirectional variant like SMAJ5.0CA is selected.
What is the reverse leakage current specification for the SMAJ5.0C at its working voltage?
The SMAJ5.0C exhibits a maximum reverse leakage current (IR) of 5 μA when biased at its full working stand-off voltage of 5.0 V. This low leakage ensures minimal impact on standby power consumption in always-on circuits such as USB-C port detection or battery-backed microcontrollers.
Can the SMAJ5.0C be used in place of SMAJ5.0A in an existing design?
The SMAJ5.0C and SMAJ5.0A share identical DO-214AC packaging and pinout, but differ in VBR range (6.4–7.3 V vs. 6.4–7.0 V) and clamping voltage (41.7 V vs. 43.5 V at 800 A). Substitution is electrically viable if the 1.8 V higher clamping of SMAJ5.0A remains within downstream IC tolerances - verification via surge testing is recommended before design-in.
SMAJ5.0C 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):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.6V
- Current - Peak Pulse (10/1000µs):
- 41.7A
- 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)
SMAJ5.0C FAQ
1.How can I place an order for SMAJ5.0C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ5.0C 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 SMAJ5.0C reliable?
The price and inventory of SMAJ5.0C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ5.0C is usually 5 days.
3.What payment methods are accepted for SMAJ5.0C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ5.0C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ5.0C?
SMAJ5.0C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ5.0C 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 SMAJ5.0C?
For technical support, including SMAJ5.0C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ5.0C requirements.
6.How does Aetrix verify that SMAJ5.0C is sourced from the original manufacturer or authorized distributors?
All SMAJ5.0C 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 SMAJ5.0C meets industry standards.
7.What is the process for return or replacement of SMAJ5.0C?
All SMAJ5.0C units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ5.0C, 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 SMAJ5.0C part is unused and in its original packaging.
Return procedure for SMAJ5.0C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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