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Taiwan Semiconductor Corporation SMAJ160C
- Part No.:
- SMAJ160C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ160C.pdf
- Description:
- 300W, 198V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,391
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Product details
Overview
SMAJ160C from Taiwan Semiconductor is a unidirectional 400W surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, with 160V working stand-off voltage (VWM), 178–218V breakdown voltage (VBR), and 287V maximum clamping voltage (VC) at 1A peak impulse current, designed for overvoltage protection in DC/DC converters and industrial power supplies.
For engineers reviewing the SMAJ160C datasheet, SMAJ160C pinout, SMAJ160C application, or SMAJ160C equivalent, this device delivers certified ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity, sub-1ps response time, <1μA reverse leakage at VWM, and robust 150°C junction temperature operation - critical for automotive-grade power rail protection and high-reliability embedded systems.
Technical Context
The SMAJ160C operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR range (178–218V at 1mA test current). Its clamping action limits transients to ≤287V under 10/1000μs waveform, enabling reliable protection of downstream MOSFETs, controllers, and sensing circuitry.
It features glass-passivated junction construction for stable breakdown characteristics, matte tin-plated leads compliant with J-STD-002 solderability, and meets JESD201 Class 2 whisker resistance. Moisture sensitivity level is rated at Level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 160 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 178–218 V @ 1 mA - Confirmed avalanche onset range ensuring predictable turn-on margin |
| VC @ IPPM | 287 V @ 1 A (10/1000μs) - Clamped voltage seen by protected circuit during worst-case surge |
| PPPM | 400 W - Peak pulse power handling capability under standard 10/1000μs transient waveform |
| IR @ VWM | <1 μA - Negligible leakage current at rated stand-off voltage, minimizing standby power loss |
| TJ max | +150 °C - Maximum junction temperature enabling operation in high-ambient industrial environments |
| Package | DO-214AC (SMA) - Industry-standard surface-mount outline with 0.060 g mass and UL 94V-0 molding compound |
Pinout & Package
DO-214AC (SMA) package: single-axis molded plastic case with cathode band marking; terminals are matte tin-plated leads compatible with reflow and wave soldering per J-STD-002; polarity is marked by cathode band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or low-side reference in unidirectional TVS configuration |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., +160V rail); conducts during overvoltage events to clamp to VC |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| Sub-1 ps response time | Enables suppression of fast-rising ESD and switching transients before sensitive ICs are damaged |
| ISO 7637-2 compliance | Validated for automotive load-dump and inductive-switching immunity (Pulse 1/2a/2b/3a/3b) |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives for environmentally constrained industrial and automotive production |
Applications
| Automotive Power Rail Protection | Industrial DC/DC Converter Input |
|---|---|
Use Scenario: Protecting 12V/24V/48V vehicle subsystems (e.g., body control modules) against load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and primary input stage to clamp surges up to ±100V beyond nominal. Use Value: Limits voltage to ≤287V during ISO 7637-2 Pulse 5a (load dump), preventing damage to upstream regulators and microcontrollers. | Use Scenario: Safeguarding isolated DC/DC converter inputs in programmable logic controllers and motor drives. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing repetitive switching noise and accidental cross-conduction spikes on 160V intermediate bus rails. Use Value: Maintains <1μA leakage at 160V VWM, avoiding efficiency loss while delivering 400W transient energy absorption without degradation. |
| LED Driver Overvoltage Suppression | Telecom Power Supply Input Stage |
Use Scenario: Shielding constant-current LED drivers from line surges in streetlight and architectural lighting systems. IC Role / Device Role / Timing Role: Primary-level TVS on HV DC bus (e.g., 160V string supply) to prevent catastrophic failure of MOSFET switches and current-sense amplifiers. Use Value: Clamps 10/1000μs transients to 287V, staying well below 300V absolute maximum ratings of common 300V-rated power FETs. | Use Scenario: Front-end protection for -48V telecom rectifier outputs exposed to lightning-induced surges on distribution lines. IC Role / Device Role / Timing Role: Bidirectional-capable variant not applicable; SMAJ160C used in unidirectional configuration on positive output rail where polarity is fixed. Use Value: Delivers 150°C TJ rating and J-STD-020 Level 1 moisture resistance for uninterrupted operation in sealed outdoor cabinets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ160A | Narrower VBR range (178–197V), lower clamping voltage (259V @ 1A), same package and VWM | Better clamping performance for tighter voltage margins; identical footprint and layout | Select SMAJ160A when lower VC is required to protect 300V-rated components with minimal headroom |
| SMBJ160C | Same VWM/VBR/VC specs but in larger DO-214AA (SMB) package; higher thermal mass and 600W PPPM rating | Used where board space allows larger footprint and higher surge endurance is needed | Choose SMBJ160C for designs requiring >400W surge handling or improved thermal derating above 25°C ambient |
Compared with SMAJ160A and SMBJ160C, the SMAJ160C offers balanced clamping voltage (287V), industry-standard SMA footprint, and verified ISO 7637-2 compliance - making it optimal for space-constrained automotive and industrial boards needing proven 400W transient immunity without layout change.
Availability
SMAJ160C is available at Aetrix Electronics and suitable for automotive power rail protection, industrial DC/DC converter input stages, and LED driver overvoltage suppression requiring stable component supply, full traceability, and lifecycle continuity.
Supply support for SMAJ160C 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 transient suppression in automotive and industrial power systems, emphasizing ISO 7637-2 compliance, tight VBR tolerances, and robust packaging for automated SMT assembly.
FAQ
What is the clamping voltage of SMAJ160C under a 10/1000μs transient?
The SMAJ160C has a maximum clamping voltage (VC) of 287 V when subjected to a 1 A peak impulse current with a 10/1000μs waveform. This value is measured per standard test conditions defined in the datasheet and represents the upper limit of voltage seen by protected circuitry during surge events - critical for ensuring compatibility with downstream 300V-rated components.
Is SMAJ160C unidirectional or bidirectional?
SMAJ160C is a unidirectional TVS diode, indicated by the "C" suffix per Taiwan Semiconductor's naming convention. It conducts only in reverse bias above VBR and must be installed with cathode toward the protected line. For bidirectional protection, the SMAJ160CA variant is specified.
What is the maximum operating junction temperature for SMAJ160C?
The SMAJ160C supports a maximum junction temperature (TJ) of +150°C, enabling reliable operation in high-ambient environments such as engine compartments, industrial enclosures, and enclosed LED drivers. Derating curves in the datasheet define safe power dissipation limits above 25°C ambient.
Does SMAJ160C meet automotive transient immunity standards?
Yes, SMAJ160C meets ISO 7637-2 requirements for Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling), as confirmed in the official Taiwan Semiconductor datasheet. This makes it suitable for 12V/24V automotive subsystems requiring certified EMC robustness.
What is the reverse leakage current specification for SMAJ160C at its working voltage?
At its rated working stand-off voltage (VWM) of 160 V, the SMAJ160C exhibits a maximum reverse leakage current (IR) of 1 μA at 25°C. This ultra-low leakage ensures minimal power loss in always-on systems and avoids false triggering in high-impedance sensing circuits.
SMAJ160C 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):
- 160V
- Voltage - Breakdown (Min):
- 178V
- Voltage - Clamping (Max) @ Ipp:
- 287V
- Current - Peak Pulse (10/1000µs):
- 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)
SMAJ160C FAQ
1.How can I place an order for SMAJ160C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ160C 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 SMAJ160C reliable?
The price and inventory of SMAJ160C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ160C is usually 5 days.
3.What payment methods are accepted for SMAJ160C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ160C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ160C?
SMAJ160C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ160C 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 SMAJ160C?
For technical support, including SMAJ160C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ160C requirements.
6.How does Aetrix verify that SMAJ160C is sourced from the original manufacturer or authorized distributors?
All SMAJ160C 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 SMAJ160C meets industry standards.
7.What is the process for return or replacement of SMAJ160C?
All SMAJ160C units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ160C, 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 SMAJ160C part is unused and in its original packaging.
Return procedure for SMAJ160C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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