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Vishay General Semiconductor - Diodes Division SMAJ110CAHE3/5A
- Part No.:
- SMAJ110CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ110CAHE3/5A.pdf
- Description:
- TVS DIODE 110VWM 177VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,210
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Product details
Overview
SMAJ110CAHE3/5A 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 power and signal 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 power supplies.
For engineers reviewing the SMAJ110CAHE3/5A datasheet, SMAJ110CAHE3/5A pinout, SMAJ110CAHE3/5A application, or SMAJ110CAHE3/5A equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and fast response (<1 ps) to ESD and lightning-induced surges.
The device delivers 400 W peak pulse power up to 78 V and derates to 300 W above that threshold, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead), supporting reliable operation under repetitive transient stress when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 110 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 110 V nominal systems. |
| VBR (min/max) | 122 V / 135 V at 1 mA - Confirmed breakdown range ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 177 V at 1.7 A - Clamping voltage limits downstream component stress during 10/1000 μs transients. |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - Peak pulse power handling capacity per standard 10/1000 μs waveform. |
| IFSM | 40 A - Surge current rating for unidirectional devices only; not applicable to SMAJ110CAHE3/5A (bidirectional). |
| TJ max | +150 °C - Maximum junction temperature supports operation in under-hood automotive and industrial environments. |
| Package | SMA (DO-214AC) - Surface-mount package with 0.208" × 0.157" footprint, MSL Level 1, lead-free matte tin plating. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with glass passivated chip junction, UL 94 V-0 rated compound, matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Bidirectional types have no polarity marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (either direction) | One terminal of symmetrical PN junction; accepts surge current regardless of polarity. |
| Cathode | Transient current entry (either direction) | Second terminal of symmetrical PN junction; completes bidirectional conduction path. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC signals, differential buses, or floating nodes without polarity constraints. |
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces. |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) when properly laid out on PCB. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes voltage overshoot during clamping, reducing risk of downstream IC latch-up or damage. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without pre-baking or special handling. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 12 V/24 V battery-fed ECUs against load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power input to clamp ±100 V spikes to <177 V. Use Value: Prevents damage to voltage regulators and microcontrollers during ISO 7637-2 Pulse 5a/b events. |
Use Scenario: Shielding analog outputs (e.g., 4–20 mA, 0–10 V) of pressure/temperature sensors from ESD and cable discharge. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal line and ground to shunt transients before reaching ADC input. Use Value: Maintains signal integrity while meeting IEC 61000-4-2 Level 4 (8 kV contact) immunity requirements. |
| Telecom Interface Protection | Consumer Device USB/Display Port Lines |
Use Scenario: Safeguarding RS-485 transceivers in base station backhaul links exposed to induced lightning surges. IC Role / Device Role / Timing Role: Bidirectional TVS installed differentially across A/B bus lines to suppress common-mode transients. Use Value: Ensures >10,000 surge cycles without degradation, meeting Telcordia GR-1089-CORE Zone 3 requirements. |
Use Scenario: Adding secondary surge protection on USB 2.0 D+/D− or DisplayPort AUX channels in laptops and docking stations. IC Role / Device Role / Timing Role: Fast-response TVS placed near connector to intercept ESD before reaching PHY IC. Use Value: Achieves system-level IEC 61000-4-2 compliance without compromising signal rise time (CJ < 100 pF typical). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ110CA-M3/5A | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free materials are mandated by OEM specifications. | Direct material substitution when environmental compliance requires bromine/chlorine-free molding compound. |
| SMBJ110CAHE3/5A | Same VWM/VC ratings but in larger SMB (DO-214AA) package; 600 W PPPM, higher IPPM (2.7 A). | Used where higher surge margin or improved thermal dissipation is needed on high-power rails. | Choose when board space allows and system-level surge testing exceeds 400 W requirements. |
Compared with SMAJ110CA-M3/5A, the SMAJ110CAHE3/5A offers identical protection performance with standard RoHS compliance; versus SMBJ110CAHE3/5A, it trades higher power handling for smaller footprint and lower parasitic inductance - critical for fast-rising transients in compact layouts.
Availability
SMAJ110CAHE3/5A is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor modules, telecom interface circuits, and consumer USB protection requiring stable component supply and long-term lifecycle support.
Supply support for SMAJ110CAHE3/5A 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 and automotive-grade qualification.
The SMAJ series is engineered for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 validation and repeatable clamping performance are mandatory.
FAQ
What does the "CA" suffix indicate in SMAJ110CAHE3/5A?
The "CA" suffix denotes a bidirectional configuration - meaning SMAJ110CAHE3/5A provides symmetrical clamping for both positive and negative transients. Unlike unidirectional "A" variants, it has no cathode marking and functions identically in either polarity, making it ideal for AC-coupled or floating signal lines where polarity cannot be guaranteed.
Is SMAJ110CAHE3/5A qualified for automotive use?
Yes, SMAJ110CAHE3/5A is AEC-Q101 qualified, as confirmed by Vishay's ordering code "HE3" suffix and documentation in datasheet 88390. This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD, validating its suitability for under-hood and chassis-mounted automotive electronics.
What is the maximum clamping voltage of SMAJ110CAHE3/5A and at what current is it specified?
The maximum clamping voltage (VC) of SMAJ110CAHE3/5A 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 defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
How does the SMA (DO-214AC) package of SMAJ110CAHE3/5A affect PCB layout?
The SMA package of SMAJ110CAHE3/5A measures 4.93 mm × 3.99 mm with 2.54 mm lead pitch, requiring minimal board area. For optimal surge performance, Vishay specifies mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - this layout reduces thermal impedance and maintains the rated 400 W pulse power capability.
Can SMAJ110CAHE3/5A replace SMAJ110AHE3/5A in a design?
No - SMAJ110CAHE3/5A is bidirectional while SMAJ110AHE3/5A is unidirectional, with opposite polarity marking and asymmetric IV characteristics. Substituting them without circuit review risks failure to clamp negative transients or unintended forward conduction; the two are not functionally interchangeable without redesigning protection topology.
SMAJ110CAHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ110CAHE3/5A FAQ
1.How can I place an order for SMAJ110CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ110CAHE3/5A 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 SMAJ110CAHE3/5A reliable?
The price and inventory of SMAJ110CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ110CAHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ110CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ110CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ110CAHE3/5A?
SMAJ110CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ110CAHE3/5A 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 SMAJ110CAHE3/5A?
For technical support, including SMAJ110CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ110CAHE3/5A requirements.
6.How does Aetrix verify that SMAJ110CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ110CAHE3/5A 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 SMAJ110CAHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ110CAHE3/5A?
All SMAJ110CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ110CAHE3/5A, 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 SMAJ110CAHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ110CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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