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Taiwan Semiconductor Corporation SMAJ16C
- Part No.:
- SMAJ16C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ16C.pdf
- Description:
- 400W, 19.8V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:5,045
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Product details
Overview
SMAJ16C from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for robust overvoltage protection in DC power rails. It features a 16 V working stand-off voltage (VWM), 17.8–21.8 V breakdown voltage (VBR @ 1 mA), 28.8 V maximum clamping voltage (VC) at 13.9 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - ideal for protecting SMPS outputs and DC/DC converter inputs against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMAJ16C datasheet, SMAJ16C pinout, SMAJ16C application, or SMAJ16C equivalent, key selection considerations include its unidirectional polarity, 1.0 ps typical response time, <1 µA reverse leakage at 16 V, UL 94V-0 molding compound, and J-STD-020 Level 1 moisture sensitivity - all critical for automotive-grade board-level surge resilience and high-reliability industrial power interfaces.
Technical Context
The SMAJ16C operates as a clamping-type unidirectional TVS diode, leveraging a glass-passivated silicon junction to achieve fast avalanche response (<1.0 ps from 0 V to VBR min) and stable breakdown behavior under repetitive transient stress. Its single-die DO-214AC construction supports automated placement and meets JESD 201 Class 2 whisker resistance requirements.
It delivers 400 W peak pulse power (10/1000 µs) at 25 °C, derating linearly above ambient temperature per Fig.2, with a maximum junction temperature of +150 °C and storage range from –55 °C to +150 °C. The device exhibits ≤3.5 V forward voltage at 25 A, confirming low-conduction-loss capability during forward surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - maximum continuous DC or RMS voltage the device blocks without conduction; sets safe operating margin below clamping threshold |
| VBR min/max | 17.8 V / 21.8 V @ 1 mA - verified avalanche onset range ensuring predictable turn-on during transients |
| VC @ IPPM | 28.8 V @ 13.9 A - clamped voltage seen by protected circuit during 400 W 10/1000 µs surge; defines worst-case stress on downstream components |
| PPPM | 400 W (10/1000 µs) - peak transient energy absorption capacity; sufficient for ISO 7637-2 automotive load dump and inductive switching events |
| IR @ VWM | <1 µA - negligible standby leakage at rated stand-off voltage, preserving efficiency in low-power always-on systems |
| Response time | <1.0 ps - enables suppression before sensitive ICs experience damaging overvoltage; faster than most ESD diodes |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with cathode band marking; compatible with standard reflow profiles and AOI inspection |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case with matte tin-plated leads, polarity indicated by cathode band. Weight ≈ 0.060 g. Meets UL 94V-0 flammability and J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input side for unidirectional clamping | Connected to protected line (e.g., +12 V rail); conducts only during reverse-biased transient events |
| Cathode | Output side / reference node | Connected to ground or lower-potential return path; defines clamping reference and polarity orientation |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) - essential for automotive ECUs |
| J-STD-020 Level 1 moisture sensitivity | Enables floor-life unlimited handling without dry-pack or baking; simplifies SMT line logistics |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS directives; supports green manufacturing and end-of-life recycling |
| Fast response & low clamping | Sub-picosecond turn-on and 28.8 V VC at 13.9 A limit voltage overshoot on 12 V systems to safe levels for 16 V-rated ICs |
Applications
| Automotive Body Control Module (BCM) | Industrial DC/DC Converter Input |
|---|---|
Use Scenario: Protecting LIN bus transceivers and microcontroller I/O from battery line transients during load dump or jump-start events. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between VBAT and GND, shunting surges before they reach 5 V/3.3 V LDOs and CAN/LIN PHYs. Use Value: Limits clamped voltage to 28.8 V, well below 36 V absolute max ratings of common automotive MCUs and transceivers - preventing latch-up or gate oxide damage. |
Use Scenario: Safeguarding primary-side MOSFET gates and controller ICs in isolated flyback or forward converters subjected to reflected surge energy. IC Role / Device Role / Timing Role: Mounted across input bulk capacitor terminals to clamp input rail spikes caused by upstream relay switching or cable inductance. Use Value: 400 W peak power rating absorbs 10/1000 µs transients up to 13.9 A without degradation, maintaining system uptime in factory automation power supplies. |
| LED Driver Power Input | Telecom Power Adapter Output |
Use Scenario: Shielding constant-current LED driver ICs from voltage spikes induced by long wiring runs or nearby motor switching in streetlight installations. IC Role / Device Role / Timing Role: Placed at DC input stage to clamp transients before buck controller and current-sense amplifier stages. Use Value: 1 µA IR at 16 V prevents measurable power loss in always-on outdoor lighting, while 28.8 V VC ensures 24 V nominal drivers remain within safe operating area. |
Use Scenario: Suppressing conducted noise and surge events on secondary-side 12 V/19 V outputs of AC-DC adapters used in network equipment. IC Role / Device Role / Timing Role: Connected between output rail and ground to protect PoE injectors, Ethernet PHYs, and voltage supervisors from external surge coupling. Use Value: DO-214AC footprint allows compact layout near connector; UL 94V-0 housing prevents flame propagation in enclosed adapter housings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ16A | Breakdown range 17.8–19.7 V; slightly tighter VBR tolerance; same DO-214AC package and 400 W rating | Identical use cases; preferred where tighter VBR consistency is required for margin-critical designs | Select SMAJ16A when statistical VBR clustering improves yield in high-volume automotive production |
| ON Semiconductor SMAJ16CA | Bidirectional variant (CA suffix); symmetrical ±16 V VWM; same clamping and power specs | Required for AC-coupled or dual-polarity signal lines; unsuitable for unidirectional DC rail protection without redesign | Choose SMAJ16CA only if bidirectional surge protection is needed - e.g., RS-485 data lines - not as drop-in replacement for SMAJ16C |
Compared with SMAJ16A and SMAJ16CA, the SMAJ16C offers optimized unidirectional clamping for DC power rails with broader VBR spread (17.8–21.8 V), enabling cost-effective margining in non-critical industrial applications while retaining full ISO 7637-2 compliance and 400 W surge capability.
Availability
SMAJ16C is available at Aetrix Electronics and suitable for automotive body electronics, industrial DC/DC converters, and LED driver power inputs requiring stable component supply with full traceability and lifecycle management.
Supply support for SMAJ16C 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 AEC-Q101-qualified automotive and industrial transient suppression, emphasizing high-energy clamping, automated assembly compatibility, and extended temperature reliability in harsh environments.
FAQ
What is the polarity configuration of the SMAJ16C?
The SMAJ16C is a unidirectional TVS diode, with anode and cathode terminals clearly marked by a cathode band on the DO-214AC package. It conducts only when the cathode is at a higher potential than the anode - making it suitable for DC rail protection where polarity is fixed. This differs from bidirectional variants like SMAJ16CA, which suppress surges in both directions.
Does the SMAJ16C meet automotive qualification standards?
Yes, the SMAJ16C meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements for automotive electrical disturbances. While not explicitly AEC-Q101 certified in this documentation, its design, packaging (J-STD-020 Level 1), and performance align with automotive-grade TVS requirements - and Taiwan Semiconductor offers AEC-Q101 versions of the SMAJ family upon request.
What is the maximum clamping voltage of the SMAJ16C under surge conditions?
The SMAJ16C has a maximum clamping voltage (VC) of 28.8 V at 13.9 A peak pulse current, measured using the standardized 10/1000 µs waveform. This value represents the highest voltage that will appear across the protected circuit during a 400 W transient event - a critical parameter for ensuring downstream ICs remain within their absolute maximum ratings.
Can the SMAJ16C be used in place of the SMAJ16A?
The SMAJ16C and SMAJ16A share the same VWM (16 V) and package (DO-214AC), but differ in breakdown voltage range: SMAJ16C is 17.8–21.8 V, while SMAJ16A is 17.8–19.7 V. They are functionally interchangeable in most applications, though SMAJ16A offers tighter VBR control. No PCB changes are required for substitution, but verify system margin with worst-case VBR in your design.
What is the moisture sensitivity level (MSL) of the SMAJ16C?
The SMAJ16C is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life at standard room temperature and humidity (≤30 °C / 60% RH). No dry-packaging, baking, or special handling is required prior to reflow soldering - simplifying manufacturing logistics and reducing process risk in high-mix SMT lines.
SMAJ16C 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):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 28.8V
- Current - Peak Pulse (10/1000µs):
- 13.9A
- 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)
SMAJ16C FAQ
1.How can I place an order for SMAJ16C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ16C 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 SMAJ16C reliable?
The price and inventory of SMAJ16C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ16C is usually 5 days.
3.What payment methods are accepted for SMAJ16C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ16C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ16C?
SMAJ16C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ16C 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 SMAJ16C?
For technical support, including SMAJ16C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ16C requirements.
6.How does Aetrix verify that SMAJ16C is sourced from the original manufacturer or authorized distributors?
All SMAJ16C 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 SMAJ16C meets industry standards.
7.What is the process for return or replacement of SMAJ16C?
All SMAJ16C units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ16C, 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 SMAJ16C part is unused and in its original packaging.
Return procedure for SMAJ16C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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