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Taiwan Semiconductor Corporation SMAJ16AH
- Part No.:
- SMAJ16AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ16AH.pdf
- Description:
- TVS DIODE 16VWM 26VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,741
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Product details
Overview
SMAJ16AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, rated for 400W peak pulse power (10/1000μs), 16V working stand-off voltage (VWM), and 26.0V maximum clamping voltage (VC) at 15.4A peak impulse current - deployed for overvoltage protection in automotive DC/DC converters and industrial power supplies.
For engineers reviewing the SMAJ16AH datasheet, SMAJ16AH pinout, SMAJ16AH application, or SMAJ16AH equivalent, key selection criteria include its AEC-Q101 qualification, <1.0ps response time, 1μA max reverse leakage at VWM, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and DO-214AC mechanical compatibility with automated SMT placement.
Technical Context
The SMAJ16AH operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 17.8–19.7V breakdown range (VBR @ 1mA). Its glass-passivated junction ensures stable clamping performance under repetitive transients, with thermal derating above 25°C per Fig.2 and non-repetitive surge capability up to 40A IFSM (8.3ms half-sine).
Designed for primary-side protection in 12V/24V automotive subsystems, it meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements. Polarity is marked by cathode band; moisture sensitivity level is J-STD-020 Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 17.8 V / 19.7 V @ 1 mA - Confirmed breakdown threshold range defining turn-on consistency |
| VC @ IPPM | 26.0 V @ 15.4 A - Clamped voltage during 10/1000μs surge, limiting downstream stress |
| PPPM | 400 W - Peak pulse power handling per standard 10/1000μs waveform |
| IR @ VWM | <1 μA - Ultra-low leakage preserves system standby current in battery-powered applications |
| TJ max | 150 °C - Maximum junction temperature enabling operation in under-hood environments |
| Package | DO-214AC (SMA) - Standardized SMT outline with 0.060g mass and matte tin-plated leads |
Pinout & Package
DO-214AC (SMA) package: surface-mount, single-ended, cathode-banded unidirectional configuration; case material meets UL 94V-0; terminals are matte tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional clamp configuration |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to protected line (e.g., 12V rail); conducts avalanche current during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Clamping response time | <1.0 ps - Enables suppression of fast-rising ESD and load-dump transients before IC damage occurs |
| ISO 7637-2 compliance | Covers Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (capacitive coupling) waveforms |
| Glass passivated junction | Ensures long-term stability of VBR and low parameter drift across temperature and life cycles |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Infotainment Power Rail | Industrial SMPS Input Stage |
|---|---|
Use Scenario: Protecting USB-C PD controller and display interface ICs from load-dump transients on 12V supply rails in head units. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and ground, clamping surges within 26.0V to prevent latch-up in 3.3V/5V logic. Use Value: AEC-Q101 qualification and ISO 7637-2 Pulse 2b/5a immunity ensure functional safety compliance without external filtering overhead. | Use Scenario: Safeguarding rectifier output and PWM controller inputs against line-induced spikes in 24V-to-5V isolated DC/DC modules. IC Role / Device Role / Timing Role: Primary-side transient absorber located after bulk capacitor, absorbing 400W pulses without degradation over >100k cycles. Use Value: 1μA leakage at 16V VWM minimizes no-load power loss; DO-214AC footprint enables high-density layout with automated placement. |
| LED Driver Board Protection | On-Board Charger (OBC) Auxiliary Supply |
Use Scenario: Shielding constant-current LED driver ICs from inductive kickback during MOSFET switching in automotive exterior lighting. IC Role / Device Role / Timing Role: Fast-clamping unidirectional suppressor across driver input, triggered within picoseconds to limit VDS overshoot. Use Value: 17.8–19.7V VBR window aligns precisely with 16V nominal rail, avoiding false triggering while ensuring margin against tolerance stack-up. | Use Scenario: Guarding 12V auxiliary supply feeding MCU, CAN transceivers, and gate drivers in EV on-board chargers. IC Role / Device Role / Timing Role: Secondary-side TVS on low-voltage rail, suppressing coupled noise from high-power AC/DC conversion stages. Use Value: JESD201 Class 2 whisker resistance and -55°C to +150°C operating range support reliability in thermally aggressive OBC enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ16H | Higher VBR range (17.8–21.8V); higher VC = 28.8V @ 13.9A; same 400W rating | Less tight VBR tolerance increases risk of premature clamping near VWM; suitable where margin >2.8V is acceptable | Select SMAJ16H only if wider VBR spread is acceptable and clamping voltage margin allows 28.8V peak |
| SMBJ16AH | Different package (DO-214AA/SMB); 600W rating; identical VWM/VBR/VC specs but larger footprint and higher IPPM | Requires PCB redesign; preferred where higher surge endurance (>600W) or thermal mass is needed | Choose SMBJ16AH only when 400W is insufficient and layout permits DO-214AA footprint |
Compared with SMAJ16H and SMBJ16AH, the SMAJ16AH offers tighter VBR control (±5.4% vs ±11.0%), lower clamping voltage (26.0V vs 28.8V), and DO-214AC compatibility with high-speed SMT lines - making it optimal for space-constrained, AEC-Q101–compliant 12V/24V systems requiring precise overvoltage thresholds.
Availability
SMAJ16AH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial SMPS designs, and LED driver boards requiring stable component supply with full traceability and AEC-Q101 assurance.
Supply support for SMAJ16AH 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 is engineered specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 reliability, ISO 7637-2 compliance, and high-volume SMT manufacturability in DO-214AC packaging.
FAQ
What is the breakdown voltage range for SMAJ16AH?
The SMAJ16AH has a guaranteed breakdown voltage (VBR) range of 17.8 V to 19.7 V at 1 mA test current, as specified in Taiwan Semiconductor's official datasheet revision A2102. This narrow 5.4% tolerance ensures consistent clamping behavior across production lots and supports precise overvoltage design margins in 16V systems.
Is SMAJ16AH unidirectional or bidirectional?
SMAJ16AH is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix and confirmed by its cathode-band marking and single-polarity electrical specifications. It protects against positive transients on the cathode side relative to anode, and must be oriented accordingly in circuit layout - unlike bidirectional variants such as SMAJ16CH.
Does SMAJ16AH meet automotive qualification standards?
Yes, SMAJ16AH is AEC-Q101 qualified and certified for automotive use, with validation covering temperature cycling, high-temperature reverse bias (HTRB), and electrostatic discharge (ESD) per JESD22-A114. It also meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements - critical for engine control, body electronics, and infotainment applications.
What is the maximum clamping voltage of SMAJ16AH at rated surge current?
The SMAJ16AH clamps to a maximum of 26.0 V at its rated peak impulse current of 15.4 A (10/1000μs waveform), as documented in the Electrical Specifications table of the TSC datasheet. This value defines the upper voltage limit imposed on protected circuitry during standardized surge events.
Can SMAJ16AH replace SMAJ16H in existing designs?
SMAJ16AH can replace SMAJ16H in most cases due to identical package (DO-214AC), polarity, and mounting; however, SMAJ16AH offers tighter VBR (17.8–19.7V vs 17.8–21.8V) and lower clamping voltage (26.0V vs 28.8V), improving protection margin. No PCB changes are required, but verify system-level clamping headroom against the reduced VC.
SMAJ16AH 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMAJ16AH FAQ
1.How can I place an order for SMAJ16AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ16AH 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 SMAJ16AH reliable?
The price and inventory of SMAJ16AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ16AH is usually 5 days.
3.What payment methods are accepted for SMAJ16AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ16AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ16AH?
SMAJ16AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ16AH 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 SMAJ16AH?
For technical support, including SMAJ16AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ16AH requirements.
6.How does Aetrix verify that SMAJ16AH is sourced from the original manufacturer or authorized distributors?
All SMAJ16AH 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 SMAJ16AH meets industry standards.
7.What is the process for return or replacement of SMAJ16AH?
All SMAJ16AH units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ16AH, 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 SMAJ16AH part is unused and in its original packaging.
Return procedure for SMAJ16AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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