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Taiwan Semiconductor Corporation SMAJ110CAH
- Part No.:
- SMAJ110CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ110CAH.pdf
- Description:
- TVS DIODE 110VWM 177VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,212
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Product details
Overview
SMAJ110CAH from Taiwan Semiconductor is a bidirectional 400W transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for automotive-grade surge protection with 110V working stand-off voltage, 122–135V breakdown range at 1mA, and 177V clamping voltage at 1.7A peak impulse current under 10/1000μs waveform. It meets AEC-Q101 qualification and ISO 7637-2 Pulse 1/2a/2b/3a/3b for vehicle electronics.
For engineers reviewing the SMAJ110CAH datasheet, SMAJ110CAH pinout, SMAJ110CAH application, or SMAJ110CAH equivalent, key selection criteria include bidirectional clamping performance at 110V VWM, AEC-Q101 reliability validation, DO-214AC thermal and mechanical compatibility, and compliance with automotive transients per ISO 7637-2.
Technical Context
The SMAJ110CAH operates as a bidirectional avalanche diode, providing symmetrical clamping in both polarities with no polarity marking required beyond the cathode band (omitted in bidirectional variants). Its glass-passivated junction enables fast response (<1.0ps), low leakage (<1μA at 110V), and stable breakdown over temperature (−55°C to +150°C).
It delivers 400W peak pulse power at TA = 25°C using the standardized 10/1000μs waveform, derating linearly above 25°C per Fig.2, and supports repetitive surge events within thermal limits defined by its 1W steady-state power dissipation and 150°C maximum junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 110 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 122 V / 135 V @ 1 mA - Confirmed breakdown threshold range defining turn-on consistency |
| VC @ IPPM | 177 V @ 1.7 A - Clamped voltage during 10/1000μs surge, limiting downstream stress |
| PPPM | 400 W (10/1000μs) - Peak surge energy absorption capacity at room temperature |
| IR @ VWM | <1 μA - Negligible leakage current ensuring minimal standby power loss |
| TJ max | +150 °C - Enables operation in under-hood automotive environments |
| Package | DO-214AC (SMA) - Industry-standard surface-mount outline with 0.060g mass and J-STD-002 solderability |
Pinout & Package
DO-214AC (SMA) package: molded epoxy case meeting UL 94V-0, matte tin-plated leads, polarity indicated by cathode band (not applicable for bidirectional SMAJ110CAH); weight ≈ 0.060 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (End without band) | Surge current entry point in negative polarity | Enables symmetrical clamping; no functional distinction from cathode in bidirectional mode |
| Cathode (End with band) | Surge current entry point in positive polarity | Same physical terminal as anode; bidirectional behavior eliminates directional dependency |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock per JESD22 |
| Glass passivated junction | Ensures stable VBR over lifetime and resistance to moisture-induced degradation |
| ISO 7637-2 compliance | Guarantees robustness against real-world vehicle electrical transients (Pulse 1, 2a, 2b, 3a, 3b) |
| Fast response time <1.0 ps | Clamps before sensitive ICs experience overvoltage damage during ESD or load dump |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; compatible with standard SMT assembly lines |
Applications
| Automotive Infotainment Power Rail | On-Board DC/DC Converter Input |
|---|---|
Use Scenario: Protecting USB-C PD and display interface power inputs in head units exposed to battery line transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry to clamp ±100V load dump and jump-start spikes. Use Value: Limits voltage to ≤177V during 1.7A surges, preserving PMIC and USB controller integrity without derating margin loss. | Use Scenario: Safeguarding 12V-to-3.3V buck converter input against alternator ripple and ignition noise. IC Role / Device Role / Timing Role: Primary transient shunt on main input rail upstream of input capacitor and controller. Use Value: Absorbs 400W pulses while maintaining <1μA leakage, preventing false triggering and standby current increase. |
| LED Headlamp Driver Module | Body Control Module (BCM) CAN Interface |
Use Scenario: Shielding high-current LED driver ICs from inductive kickback during PWM dimming and relay switching. IC Role / Device Role / Timing Role: Parallel-connected TVS across driver supply pins to suppress sub-microsecond voltage spikes. Use Value: Sub-1ps response ensures clamping occurs before driver gate oxide breakdown, extending module MTBF. | Use Scenario: Protecting isolated CAN transceiver power and signal lines from ESD and battery transients. IC Role / Device Role / Timing Role: Dual-purpose suppression on VCC and common-mode bus lines in compact BCM layout. Use Value: Bidirectional symmetry allows single-device coverage of both polarities, reducing BOM count and PCB area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ110AHE3/5BT | Same VWM (110V), identical VBR (122–135V), same DO-214AC package; Vishay variant with identical AEC-Q101 and ISO 7637-2 compliance | No functional difference; validated for identical automotive subsystems | Select when dual-sourcing or lead-time constraints require alternate supply chain |
| P6SMB110CA | Same VWM (110V), slightly higher VC (187V @ 1.6A), 600W rating but only 300W above 78V per spec; also DO-214AC, AEC-Q101 qualified | Higher clamping voltage reduces margin for 3.3V/5V rail protection; preferred where higher peak power is needed at lower VWM | Choose for legacy designs already using SMB footprint or where 10V higher VC is acceptable |
Compared with SMAJ110CAH, SMAJ110AHE3/5BT offers identical electrical and mechanical specs with second-source assurance, while P6SMB110CA trades 10V higher clamping for greater peak power headroom-making SMAJ110CAH optimal for tight-voltage-margin automotive rails.
Availability
SMAJ110CAH is available at Aetrix Electronics and suitable for automotive infotainment systems, on-board DC/DC converters, and LED lighting modules requiring stable component supply with AEC-Q101 traceability and ISO 7637-2 compliance.
Supply support for SMAJ110CAH 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 automotive-qualified components.
The SMAJ series was developed specifically for AEC-Q101-compliant automotive transient suppression, targeting robust, surface-mount surge protection in space-constrained engine control, lighting, and body electronics modules.
FAQ
What does the "CAH" suffix indicate in SMAJ110CAH?
The "CAH" suffix in SMAJ110CAH denotes a bidirectional configuration (C), AEC-Q101 qualification (A), and high-reliability packaging (H). Unlike unidirectional "CH" variants, SMAJ110CAH provides symmetrical clamping for both positive and negative transients without polarity orientation constraints during placement.
Does SMAJ110CAH require a heatsink in typical automotive applications?
No, SMAJ110CAH does not require an external heatsink in standard automotive applications. Its DO-214AC package and 1W steady-state power dissipation rating are sufficient for intermittent surge duty cycles. Thermal design relies on PCB copper area per JEDEC standards; heatsinking is unnecessary unless subjected to repetitive high-frequency surges exceeding derating curves.
How does SMAJ110CAH perform under load dump conditions per ISO 7637-2 Pulse 5a?
SMAJ110CAH is explicitly rated for ISO 7637-2 Pulse 5a (load dump), with its 400W 10/1000μs capability and 177V clamping voltage ensuring compliance. When used with appropriate series impedance (e.g., 10Ω line resistor), it limits peak voltage to safe levels for downstream 12V-rated ICs, satisfying OEM requirements for engine bay electronics.
Is SMAJ110CAH compatible with lead-free reflow profiles?
Yes, SMAJ110CAH is fully compatible with standard lead-free reflow profiles (JEDEC J-STD-020 Level 1), supported by its moisture sensitivity level 1 rating and matte tin-plated leads compliant with J-STD-002. No pre-bake is required, and it withstands peak temperatures up to 260°C for 10 seconds without degradation.
Can SMAJ110CAH be used in place of SMAJ110AH in existing designs?
No-SMAJ110CAH is bidirectional while SMAJ110AH is unidirectional. Swapping them requires verifying circuit polarity and clamping direction. SMAJ110AH has a cathode band and clamps only in reverse bias; SMAJ110CAH clamps symmetrically and lacks polarity marking. Layout and schematic changes are necessary for substitution.
SMAJ110CAH 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):
- 110V
- Voltage - Breakdown (Min):
- 122V
- Voltage - Clamping (Max) @ Ipp:
- 177V
- Current - Peak Pulse (10/1000µs):
- 1.7A
- 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)
SMAJ110CAH FAQ
1.How can I place an order for SMAJ110CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ110CAH 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 SMAJ110CAH reliable?
The price and inventory of SMAJ110CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ110CAH is usually 5 days.
3.What payment methods are accepted for SMAJ110CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ110CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ110CAH?
SMAJ110CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ110CAH 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 SMAJ110CAH?
For technical support, including SMAJ110CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ110CAH requirements.
6.How does Aetrix verify that SMAJ110CAH is sourced from the original manufacturer or authorized distributors?
All SMAJ110CAH 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 SMAJ110CAH meets industry standards.
7.What is the process for return or replacement of SMAJ110CAH?
All SMAJ110CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ110CAH, 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 SMAJ110CAH part is unused and in its original packaging.
Return procedure for SMAJ110CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ110CAH Tags
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