My Inquiry
My Account
Taiwan Semiconductor Corporation SMAJ16CAH
- Part No.:
- SMAJ16CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ16CAH.pdf
- Description:
- TVS DIODE 16VWM 26VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,719
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ16CAH from Taiwan Semiconductor is a bidirectional 400W transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for automotive-grade overvoltage protection with 16V working stand-off voltage (VWM), 17.8–19.7V breakdown voltage (VBR), and 26.0V clamping voltage (VC) at 15.4A peak pulse current. It meets AEC-Q101 qualification and ISO 7637-2 Pulse 1/2a/2b/3a/3b for robust vehicle electrical system protection.
For engineers reviewing the SMAJ16CAH datasheet, SMAJ16CAH pinout, SMAJ16CAH application, or SMAJ16CAH equivalent, this device is selected for high-reliability DC bus protection in automotive power modules, on-board DC/DC converters, and industrial SMPS where fast clamping (<1.0ps response), low leakage (<1µA @ 16V), and 150°C junction operation are critical.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, enabling single-device protection of AC-coupled or floating signal/power lines without polarity dependency. Its glass-passivated junction ensures stable VBR tolerance and low IR drift across temperature.
The device delivers 400W peak pulse power (10/1000µs waveform) up to 78V VWM; above that, derated to 300W. Clamping performance is validated at IPPM = 15.4A, with VC = 26.0V - directly limiting transient energy dissipation in protected downstream circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC bias margin. |
| VBR min/max | 17.8 / 19.7 V @ 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during transients. |
| VC @ IPPM | 26.0 V @ 15.4 A - Clamped voltage under 10/1000µs surge; limits stress on downstream ICs and MOSFETs. |
| PPPM | 400 W (10/1000µs) - Peak transient energy absorption capacity; supports ISO 7637-2 compliance. |
| IR @ VWM | <1 µA - Negligible leakage at rated stand-off; avoids quiescent power loss in battery-powered systems. |
| TJ max | +150 °C - Enables placement near hot components (e.g., power inductors, MOSFETs) in engine bay or power supply designs. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, bi-directional configuration with cathode band omitted (symmetrical terminals). Matte tin-plated leads, J-STD-002 solderable, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (bidirectional) | Transient current path | Both terminals function identically; no polarity marking required - simplifies layout and eliminates orientation errors. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood use per stress test requirements including HTOL, TC, UHAST, and mechanical shock. |
| Fast response time <1.0 ps | Clamps ESD and load-dump transients before sensitive logic or gate drivers experience overstress. |
| ISO 7637-2 compliant (Pulse 1/2a/2b/3a/3b) | Meets full suite of automotive transient immunity standards - no additional filtering needed for CAN/LIN bus or 12V/24V rails. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive - suitable for green manufacturing and export to regulated markets. |
Applications
| Automotive Infotainment Power Rail | Industrial On-Board DC/DC Converter |
|---|---|
Use Scenario: Protecting 5V/3.3V power domains feeding MCU, display controller, and audio codec in head unit against battery load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping element placed at DC/DC input and LDO inputs to limit transient excursions below IC absolute maximum ratings. Use Value: Prevents latch-up or permanent damage during ISO 7637-2 Pulse 2b (alternator disconnect) events up to 100V/100ms. |
Use Scenario: Safeguarding isolated 24V-to-5V flyback converter primary-side controller and secondary-side feedback circuitry in factory automation PLCs. IC Role / Device Role / Timing Role: Front-end transient absorber on input rail, coordinated with MOV and common-mode choke to meet IEC 61000-4-5 Level 3. Use Value: Limits peak voltage to ≤26.0V during 1kV/0.5Ω surge, preserving optocoupler CTR and TL431 reference stability. |
| LED Driver Module Input Stage | Telecom Power Adapter Output |
Use Scenario: Guarding constant-current LED driver ICs against induced surges from nearby relay switching or lightning-induced coupling in streetlight control systems. IC Role / Device Role / Timing Role: Parallel-connected TVS across bulk capacitor input to clamp fast-rising transients before they propagate to PWM controller and gate driver. Use Value: Maintains <1µA leakage at 16V VWM - avoids false triggering of under-voltage lockout while delivering 400W surge handling. |
Use Scenario: Secondary-side output protection in universal-input AC/DC adapters supplying PoE-powered devices or IoT gateways. IC Role / Device Role / Timing Role: Final-stage overvoltage limiter on +12V or +5V output rail, ensuring compliance with UL 62368-1 transient immunity requirements. Use Value: Clamps to 26.0V within <1.0ps, preventing damage to USB-PD controllers or Ethernet PHYs during conducted EFT bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ16AHE3/5B (Vishay) | Same DO-214AC package, VBR = 17.8–19.7V, VC = 26.0V, but rated for 300W only above 78V - identical 400W rating at 16V. | Qualified to AEC-Q101 but lacks explicit ISO 7637-2 Pulse 3b validation in public datasheet. | Select when cost sensitivity outweighs need for full ISO 7637-2 documentation traceability. |
| P6SMB16CA (ON Semiconductor) | DO-214AA (SMB) package - larger footprint (4.58 × 3.94 mm vs. SMA's 4.57 × 2.79 mm); same VWM/VBR/VC specs and 400W rating. | Higher thermal resistance due to SMB package; less suitable for high-density automotive PCBs with tight spacing constraints. | Prefer for legacy designs already using SMB footprints or where board space allows larger thermal mass. |
Compared with SMAJ16CAH, SMAJ16AHE3/5B offers equivalent electrical performance but less comprehensive automotive transient certification evidence, while P6SMB16CA provides identical protection specs in a physically larger package that impacts layout density and thermal response in compact modules.
Availability
SMAJ16CAH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial DC/DC converters, and LED lighting modules requiring stable component supply with AEC-Q101 assurance and ISO 7637-2 compliance.
Supply support for SMAJ16CAH 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 high-reliability protection devices and power management components.
The SMAJ series was developed specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust glass-passivated junction construction for long-term field reliability.
FAQ
What does the "CAH" suffix indicate in SMAJ16CAH?
The "CAH" suffix denotes a bidirectional configuration (C), AEC-Q101 qualification (A), and high-reliability process (H). Unlike unidirectional "CH" variants, SMAJ16CAH conducts equally in both directions - essential for protecting AC-coupled signals or floating power rails without polarity concerns. This matches the exact marking and specification listed in TSC's official datasheet revision A2102.
Is SMAJ16CAH suitable for 24V automotive systems?
Yes, SMAJ16CAH is explicitly designed for 24V nominal systems. Its 16V VWM provides appropriate margin below typical 28V load-dump peaks, while its 26.0V clamping voltage ensures downstream 3.3V/5V/12V ICs remain within absolute maximum ratings. It meets ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2b (alternator disconnect) - standard requirements for 24V commercial vehicle ECUs.
How does SMAJ16CAH differ from SMAJ16AH?
SMAJ16CAH is bidirectional; SMAJ16AH is unidirectional. The "C" in SMAJ16CAH enables symmetrical clamping in both polarities, whereas SMAJ16AH has a defined anode/cathode and only clamps in reverse bias. Their VBR (17.8–19.7V), VC (26.0V), and PPPM (400W) are identical, but SMAJ16CAH omits the cathode band marking and is used where polarity is undefined or alternating.
What is the maximum junction temperature rating for SMAJ16CAH?
The maximum junction temperature (TJ max) for SMAJ16CAH is +150°C, confirmed in the Absolute Maximum Ratings table of the TSC datasheet. This allows reliable operation in under-hood environments and near heat-generating components like power inductors or MOSFETs, provided PCB copper area and airflow meet thermal derating guidelines in Figure 2.
Does SMAJ16CAH require external series impedance for effective protection?
No, SMAJ16CAH functions as a parallel-connected shunt protector and does not require series impedance to operate - though adding a small ferrite bead or resistor upstream improves energy distribution during multi-pulse events. Its sub-1.0ps response ensures clamping initiates before most system-level filters can react, making it effective even without added impedance in standard ISO 7637-2 test configurations.
SMAJ16CAH 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ16CAH FAQ
1.How can I place an order for SMAJ16CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ16CAH 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 SMAJ16CAH reliable?
The price and inventory of SMAJ16CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ16CAH is usually 5 days.
3.What payment methods are accepted for SMAJ16CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ16CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ16CAH?
SMAJ16CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ16CAH 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 SMAJ16CAH?
For technical support, including SMAJ16CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ16CAH requirements.
6.How does Aetrix verify that SMAJ16CAH is sourced from the original manufacturer or authorized distributors?
All SMAJ16CAH 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 SMAJ16CAH meets industry standards.
7.What is the process for return or replacement of SMAJ16CAH?
All SMAJ16CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ16CAH, 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 SMAJ16CAH part is unused and in its original packaging.
Return procedure for SMAJ16CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ16CAH 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…
