My Inquiry
My Account
Taiwan Semiconductor Corporation SMAJ16CA
- Part No.:
- SMAJ16CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ16CA.pdf
- Description:
- TVS DIODE 16VWM 26VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,355
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ16CA from Taiwan Semiconductor is a bidirectional transient voltage suppressor diode in DO-214AC (SMA) package, designed for robust ESD and surge protection in DC power rails and signal lines. It features a 16 V working stand-off voltage (VWM), 17.8–19.7 V breakdown voltage (VBR), 26.0 V maximum clamping voltage (VC) at 15.4 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform-used in automotive DC/DC converters and industrial SMPS input stages.
For engineers reviewing the SMAJ16CA datasheet, SMAJ16CA pinout, SMAJ16CA application, or SMAJ16CA equivalent, key selection criteria include bidirectional clamping capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, low leakage (<1 µA at 16 V), fast response (<1.0 ps), and DO-214AC surface-mount compatibility for automated assembly.
Technical Context
The SMAJ16CA is a unidirectional/bidirectional TVS diode configured as a single die in a planar junction, glass-passivated construction. Its bidirectional operation (denoted by "CA" suffix) enables symmetrical clamping in AC-coupled or floating circuits without polarity sensitivity, supporting both positive and negative transients up to ±26.0 V.
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 meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for high-reliability PCB mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR @ IT=1 mA | 17.8–19.7 V - Measured breakdown threshold; ensures reliable turn-on during overvoltage events. |
| VC @ IPPM=15.4 A | 26.0 V - Clamped voltage under 10/1000 µs surge; limits downstream component stress. |
| PPPM | 400 W - Peak pulse power handling (10/1000 µs); supports automotive load dump and ISO 7637-2 pulses. |
| IR @ VWM | <1 µA - Reverse leakage at 16 V; minimizes standby power loss in battery-powered systems. |
| Junction Temp Range | –55 °C to +150 °C - Enables deployment in under-hood automotive and industrial environments. |
Pinout & Package
DO-214AC (SMA) surface-mount package: molded epoxy case with matte tin-plated leads, polarity indicated by cathode band (bidirectional operation renders polarity marking non-functional but retained for mechanical consistency).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bidirectional terminal pair | Identical electrical behavior in either direction; no functional anode/cathode distinction-used across differential or floating nodes. |
| Case | Non-connected thermal path | DO-214AC body provides mechanical anchoring and limited thermal conduction; no internal connection to silicon die. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| Fast response time <1.0 ps | Clamps ESD and fast transients before sensitive ICs experience overstress-critical for USB, CAN, and sensor interfaces. |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive 12 V system immunity, including load dump (Pulse 5a not covered-requires higher-voltage variant). |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking; eliminates production delays and moisture-related popcorning. |
Applications
| Automotive DC/DC Converter Input Protection | Industrial SMPS Line Surge Suppression |
|---|---|
Use Scenario: Protecting primary-side MOSFETs and controller ICs in 12 V-to-5 V buck converters subjected to ISO 7637-2 Pulse 2a (battery disconnect) and Pulse 3b (switching noise). IC Role / Device Role: Bidirectional clamping element placed across input rail and ground to shunt transient energy before it reaches switching stage. Use Value: Limits voltage excursion to ≤26.0 V during 15.4 A surges, preventing gate oxide rupture and controller latch-up. | Use Scenario: Safeguarding AC-DC adapter output rails against lightning-induced surges and inductive kickback from relay coils. IC Role / Device Role: Standoff-clamp TVS placed after rectification but before bulk capacitor to absorb repetitive line transients. Use Value: Withstands 400 W peak pulses while maintaining <1 µA leakage at 16 V, preserving efficiency in always-on power supplies. |
| LED Driver Overvoltage Clamp | RS-485 Transceiver Port Protection |
Use Scenario: Preventing catastrophic failure of constant-current LED drivers during hot-swap or cable discharge events in streetlight control systems. IC Role / Device Role: Bidirectional TVS connected between driver output and return, clamping both polarity transients induced by cable coupling. Use Value: Fast <1.0 ps response captures sub-microsecond ESD events; 26.0 V clamping protects 24 V-rated LED strings without false triggering. | Use Scenario: Shielding RS-485 transceivers (e.g., THVD1550) on factory floor networks from ground potential differences and EFT bursts. IC Role / Device Role: Common-mode TVS across A/B lines referenced to ground, suppressing differential and common-mode surges simultaneously. Use Value: Symmetrical clamping ensures equal protection on both data lines; DO-214AC footprint allows compact placement near connector. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ16A (Taiwan Semiconductor) | Unidirectional; same VWM, VBR, VC, and PPPM, but only clamps negative transients relative to cathode. | Requires correct polarity orientation; unsuitable for AC-coupled or floating bus lines where bidirectional clamping is mandatory. | Select SMAJ16CA when protecting symmetric signal paths (e.g., CAN, RS-485) or ungrounded rails where polarity is undefined. |
| SMBJ16CA (ON Semiconductor) | Same electrical specs and bidirectional function, but in larger DO-214AA (SMB) package (4.58 mm × 3.94 mm vs. SMA's 4.32 mm × 2.62 mm); 600 W PPPM. | Higher surge rating suits more severe environments (e.g., railway traction power), but requires PCB layout change due to larger footprint. | Choose SMBJ16CA only if 600 W rating is required and board space permits larger package; SMAJ16CA remains optimal for space-constrained automotive modules. |
Compared with SMAJ16A, SMAJ16CA eliminates polarity dependency for simplified layout and universal placement; versus SMBJ16CA, it offers identical protection performance in a 30% smaller footprint-critical for dense engine control unit designs where board area is premium.
Availability
SMAJ16CA is available at Aetrix Electronics and suitable for automotive DC/DC converters, industrial SMPS units, and LED driver modules requiring stable component supply across extended temperature ranges and high-volume production cycles.
Supply support for SMAJ16CA 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 since 1979.
The SMAJ series was developed specifically for AEC-Q101-compliant automotive transient suppression, emphasizing robustness against ISO 7637-2 pulses, tight parametric tolerances, and surface-mount manufacturability for Tier-1 module assembly.
FAQ
What does the "CA" suffix indicate in SMAJ16CA?
The "CA" suffix denotes bidirectional configuration: SMAJ16CA clamps transients of either polarity symmetrically across its terminals, unlike unidirectional variants (e.g., SMAJ16A) that require correct anode/cathode orientation. This makes SMAJ16CA ideal for AC-coupled interfaces, floating grounds, and differential buses like CAN or RS-485 where voltage polarity reversal is possible. The device achieves this via dual-junction construction within a single DO-214AC package.
Does SMAJ16CA meet automotive qualification standards?
SMAJ16CA is designed to meet AEC-Q101 stress test requirements for discrete semiconductors and complies with ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b for 12 V automotive systems. While not explicitly certified in the provided datasheet, its electrical parameters-including 150 °C max junction temperature, MSL Level 1 rating, and glass passivation-are aligned with automotive-grade reliability. Full AEC-Q101 certification documentation is available directly from Taiwan Semiconductor upon request.
What is the maximum clamping voltage of SMAJ16CA under surge conditions?
The maximum clamping voltage (VC) of SMAJ16CA is 26.0 V when subjected to its rated peak pulse current of 15.4 A using the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C and represents the upper limit of voltage seen by protected circuitry during worst-case surge events-ensuring downstream components rated for ≥26.0 V withstand stress without damage.
Can SMAJ16CA be used in place of SMAJ16A without layout changes?
Yes-SMAJ16CA shares identical DO-214AC (SMA) package dimensions, pad layout, and soldering profile with SMAJ16A, enabling direct PCB replacement. However, because SMAJ16CA is bidirectional and SMAJ16A is unidirectional, removing polarity constraints may simplify routing but requires verification that the original design did not rely on unidirectional blocking behavior (e.g., DC bias isolation). No rework is needed for footprint or thermal design.
How does SMAJ16CA perform under elevated ambient temperatures?
SMAJ16CA's peak pulse power rating derates linearly above 25 °C per Figure 2 in the datasheet: at 85 °C ambient, its 400 W rating reduces to approximately 260 W. Its maximum junction temperature remains 150 °C, and the device maintains full electrical specifications-including VBR, VC, and IR-within its operational range. Designers must apply appropriate thermal relief and copper pour to sustain performance in high-temp environments like engine compartments.
SMAJ16CA 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:
- 26V
- Current - Peak Pulse (10/1000µs):
- 15.4A
- 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)
SMAJ16CA FAQ
1.How can I place an order for SMAJ16CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ16CA 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 SMAJ16CA reliable?
The price and inventory of SMAJ16CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ16CA is usually 5 days.
3.What payment methods are accepted for SMAJ16CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ16CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ16CA?
SMAJ16CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ16CA 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 SMAJ16CA?
For technical support, including SMAJ16CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ16CA requirements.
6.How does Aetrix verify that SMAJ16CA is sourced from the original manufacturer or authorized distributors?
All SMAJ16CA 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 SMAJ16CA meets industry standards.
7.What is the process for return or replacement of SMAJ16CA?
All SMAJ16CA units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ16CA, 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 SMAJ16CA part is unused and in its original packaging.
Return procedure for SMAJ16CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ16CA Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
