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Vishay General Semiconductor - Diodes Division SMAJ110CA-M3/5A
- Part No.:
- SMAJ110CA-M3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ110CA-M3/5A.pdf
- Description:
- TVS DIODE 110VWM 177VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,401
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Product details
Overview
SMAJ110CA-M3/5A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features a 110 V stand-off voltage (VWM), 122–135 V breakdown voltage (VBR) at 1 mA, 177 V maximum clamping voltage (VC) at 1.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMAJ110CA-M3/5A datasheet, SMAJ110CA-M3/5A pinout, SMAJ110CA-M3/5A application, or SMAJ110CA-M3/5A equivalent, key selection criteria include bidirectional clamping capability, 177 V clamping voltage at rated surge current, -55 °C to +150 °C operating junction temperature, halogen-free RoHS-compliant construction, and compatibility with automated SMT placement on standard PCB copper pads.
Technical Context
This bidirectional TVS diode operates symmetrically in both polarities, delivering consistent clamping performance without polarity dependency. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM), while the SMA package provides thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead) under defined pad layout conditions.
The device meets AEC-Q101 qualification when ordered with HE3/HM3 suffixes, though SMAJ110CA-M3/5A itself is commercial-grade halogen-free. It sustains repetitive 10/1000 μs surges at 0.01% duty cycle up to 400 W below 78 V and 300 W above - validated with derating per Fig. 2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 110 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for protected circuitry. |
| VBR (min/max) | 122 V / 135 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during overvoltage events. |
| VC @ IPPM | 177 V at 1.7 A - Clamping voltage under full-rated 10/1000 μs surge; determines worst-case stress on downstream components. |
| PPPM | 400 W - Peak pulse power handling with 10/1000 μs waveform; supports robust protection against lightning-induced or inductive-switching transients. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); relevant for unidirectional variants only - not applicable to SMAJ110CA-M3/5A. |
| TJ Range | -55 °C to +150 °C - Full operational junction temperature range enabling use in under-hood automotive and industrial environments. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.0 mm × 5.0 mm copper pad requirement per terminal for thermal and surge performance compliance. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, MSL Level 1 compliant (peak reflow 260 °C), UL 94 V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A (bidirectional) | One end of symmetrical PN junction; no polarity marking; connects to line under protection. |
| Cathode | Terminal K (bidirectional) | Other end of symmetrical PN junction; identical electrical behavior to Anode; forms bidirectional clamping path. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 400 W peak pulse power | Supports high-energy transient suppression per IEC 61000-4-5 (lightning) and ISO 7637-2 (automotive load dump). |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes voltage overshoot during clamping, reducing stress on protected ICs and MOSFETs. |
| Halogen-free & RoHS-compliant (M3 suffix) | Fulfills environmental compliance requirements for global electronics manufacturing without compromising surge robustness. |
| Fast response time (<1 ps) | Activates before most semiconductor damage thresholds are exceeded during ESD or fast-rising transients. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V power rails in body control modules against load dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across supply rail upstream of DC-DC converters and microcontrollers. Use Value: Limits rail voltage to ≤177 V during 400 W surges, preventing latch-up or permanent damage to downstream ASICs and gate drivers. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loops) in factory-floor pressure/temperature sensors from EFT and surge coupling. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal and ground to shunt fast transients without distorting low-bandwidth analog signals. Use Value: Maintains signal integrity with <1.0 μA leakage at 110 V, while clamping ESD events to safe levels before reaching precision ADC front-ends. |
| Telecom Data Line Surge Suppression | Consumer Equipment AC Adapter Input Protection |
Use Scenario: Safeguarding RS-485 transceivers in base station backhaul links exposed to induced lightning surges on long cable runs. IC Role / Device Role / Timing Role: Bidirectional TVS installed differential-mode across A/B bus lines and common-mode to ground. Use Value: Withstands repeated 10/1000 μs surges up to 1.7 A while holding clamped voltage below transceiver absolute maximum ratings. |
Use Scenario: Adding secondary-level transient protection on the DC output side of wall adapters powering smart home hubs and IoT gateways. IC Role / Device Role / Timing Role: Final-stage clamping device after primary MOV/fuse, absorbing residual spikes that bypass upstream protection. Use Value: Provides precise 110 V standoff and 177 V clamping to prevent brownout or reset events caused by ripple-induced overvoltage on 12 V rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ110CA-E3/5A | Same electrical specs; RoHS-compliant but contains brominated flame retardants (non-halogen-free). | Acceptable where halogen-free requirement is not mandated (e.g., non-automotive commercial products). | Select when cost sensitivity outweighs halogen-free compliance; identical footprint and assembly process. |
| SMAJ110A-M3/5A | Unidirectional variant; cathode-marked; same VWM, VBR, VC, and PPPM; requires correct polarity orientation during placement. | Suitable only for DC-biased lines where polarity is fixed and known (e.g., regulated 110 V DC supplies). | Choose only if circuit topology guarantees unidirectional stress; avoids unnecessary bidirectional capability overhead. |
Compared with SMAJ110CA-E3/5A, the SMAJ110CA-M3/5A offers halogen-free compliance without sacrificing surge rating or thermal performance; versus SMAJ110A-M3/5A, it eliminates polarity-dependent layout constraints but adds no clamping advantage on DC-only lines.
Availability
SMAJ110CA-M3/5A is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface protection, telecom data line surge suppression, and consumer equipment AC adapter input protection requiring stable component supply and traceable sourcing.
Supply support for SMAJ110CA-M3/5A 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series delivers standardized, high-power TVS protection in compact surface-mount packages for automotive, industrial, and communications systems where repeatable clamping and AEC-Q101 readiness are critical design requirements.
FAQ
What does the "CA" suffix indicate in SMAJ110CA-M3/5A?
The "CA" suffix denotes a bidirectional configuration - meaning the SMAJ110CA-M3/5A functions identically in both polarities, with symmetrical breakdown and clamping characteristics. Unlike unidirectional "A" variants, it has no cathode band marking and is ideal for AC-coupled or floating signal paths where voltage polarity reversal may occur during transients.
Is SMAJ110CA-M3/5A qualified to AEC-Q101?
No - SMAJ110CA-M3/5A is a commercial-grade halogen-free part. AEC-Q101 qualification applies only to variants with "HE3" or "HM3" suffixes (e.g., SMAJ110CAHE3_A/I). The M3 suffix confirms RoHS compliance and halogen-free construction but does not imply automotive qualification; users requiring AEC-Q101 must specify the appropriate HE3/HM3 ordering code.
What is the maximum clamping voltage of SMAJ110CA-M3/5A and under what test condition?
The maximum clamping voltage of SMAJ110CA-M3/5A is 177 V, measured at a peak pulse current (IPPM) of 1.7 A using the standardized 10/1000 μs double-exponential waveform. This value is guaranteed per the datasheet's Electrical Characteristics table and defines the upper voltage limit imposed on protected circuitry during a full-rated surge event.
Can SMAJ110CA-M3/5A be used in place of SMAJ110A-M3/5A?
SMAJ110CA-M3/5A can replace SMAJ110A-M3/5A only if the application involves bidirectional or AC-coupled signals - because the "CA" version lacks polarity marking and clamps in both directions. In strictly DC-unidirectional circuits, substitution is electrically valid but introduces unnecessary symmetry; however, layout changes may be needed since SMAJ110A-M3/5A requires cathode alignment while SMAJ110CA-M3/5A does not.
What PCB pad layout is required to achieve the rated 400 W pulse power for SMAJ110CA-M3/5A?
To achieve the full 400 W peak pulse power rating, SMAJ110CA-M3/5A must be mounted on minimum recommended copper pads: 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal, as specified in the datasheet's "Maximum Ratings" note (2). Smaller pads reduce thermal dissipation and surge current handling, derating both power and IPPM per Fig. 2 - failure to meet this layout invalidates the 400 W rating.
SMAJ110CA-M3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- 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:
- 300W
- 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)
SMAJ110CA-M3/5A FAQ
1.How can I place an order for SMAJ110CA-M3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ110CA-M3/5A 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 SMAJ110CA-M3/5A reliable?
The price and inventory of SMAJ110CA-M3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ110CA-M3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ110CA-M3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ110CA-M3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ110CA-M3/5A?
SMAJ110CA-M3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ110CA-M3/5A 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 SMAJ110CA-M3/5A?
For technical support, including SMAJ110CA-M3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ110CA-M3/5A requirements.
6.How does Aetrix verify that SMAJ110CA-M3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ110CA-M3/5A 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 SMAJ110CA-M3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ110CA-M3/5A?
All SMAJ110CA-M3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ110CA-M3/5A, 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 SMAJ110CA-M3/5A part is unused and in its original packaging.
Return procedure for SMAJ110CA-M3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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