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Vishay General Semiconductor - Diodes Division SMAJ110AHE3/5A
- Part No.:
- SMAJ110AHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ110AHE3/5A.pdf
- Description:
- TVS DIODE 110VWM 177VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,707
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Product details
Overview
SMAJ110AHE3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of sensitive electronics. It features a 110 V stand-off voltage (VWM), 122–135 V breakdown voltage (VBR) at 1 mA, and clamps transients to ≤177 V at 1.7 A peak pulse current (IPPM) under 10/1000 μs waveform - ideal for safeguarding power rails and I/O lines in automotive ECUs and industrial motor drives.
For engineers reviewing the SMAJ110AHE3/5A datasheet, SMAJ110AHE3/5A pinout, SMAJ110AHE3/5A application, or SMAJ110AHE3/5A equivalent, key selection criteria include its AEC-Q101 qualification, 400 W peak pulse power rating (derated to 300 W above 78 V), low 0.107 %/°C VBR temperature coefficient, and RoHS-compliant matte tin-plated leads suitable for automated SMT assembly.
Technical Context
This unidirectional TVS diode operates as a voltage-clamping device across DC power inputs or signal paths, activating when reverse voltage exceeds its VWM (110 V) and entering avalanche conduction at VBR (min. 122 V). Its fast response time (<1 ps) and low incremental surge resistance ensure effective suppression of ESD, lightning-induced surges, and inductive switching transients.
The device is rated for 40 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), supports continuous power dissipation of 3.3 W at 50 °C on infinite heatsink, and maintains operation across –55 °C to +150 °C junction temperature range - enabling use in under-hood automotive and high-temperature industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 110 V - maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 122 V / 135 V at 1 mA - precise breakdown threshold defining turn-on consistency |
| VC @ IPPM | ≤177 V at 1.7 A - clamped voltage during 10/1000 μs surge, limiting stress on downstream ICs |
| PPPM | 400 W (≤78 V), 300 W (>78 V) - peak surge energy handling capability per standard waveform |
| IFSM | 40 A - withstands single 8.3 ms inrush or fault currents without degradation |
| TJ max. | +150 °C - enables placement near heat-generating components in compact layouts |
| Temp. Coeff. VBR | 0.107 %/°C - ensures stable clamping voltage across wide ambient temperature ranges |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads; cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to lower-potential side (e.g., GND or return path) in protection configuration |
| Cathode | Avalanche conduction terminal | Banded end; connected to protected line (e.g., 110 V rail) to clamp overvoltage to ground |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| 400 W peak pulse power | Handles high-energy transients common in 24 V/48 V vehicle power systems and industrial PLCs |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| Glass passivated junction | Ensures stable leakage performance and long-term stability under thermal stress |
| Low profile SMA package | Enables high-density PCB layouts while maintaining thermal performance via copper pad mounting |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 110 V auxiliary power supply in ADAS domain controllers from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between battery rail and DC-DC input, conducting only during overvoltage events. Use Value: Limits voltage excursion to ≤177 V, preventing damage to 120 V-rated input capacitors and controller ICs. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure or current sensors) in factory automation equipment exposed to relay coil kickback. IC Role / Device Role / Timing Role: Standoff-mode protector on 24 V sensor supply line, activated only during >110 V spikes. Use Value: Maintains signal integrity with <1 μA leakage at 110 V, avoiding offset errors in precision measurement circuits. |
| Telecom Line Card Surge Protection | Motor Drive Control Signal Protection |
Use Scenario: Secondary-level surge protection on -48 V telecom power feeds where primary protectors handle bulk energy. IC Role / Device Role / Timing Role: Fast-response clamping element downstream of gas discharge tube (GDT), suppressing residual overshoot. Use Value: Sub-nanosecond response ensures clamping occurs before downstream DC/DC converters experience overstress. |
Use Scenario: Protecting isolated gate driver enable signals in 110 V-rated BLDC motor inverters against cross-conduction transients. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; this unidirectional part guards enable line referenced to system ground. Use Value: Withstands repeated 1.7 A surges without parameter shift, ensuring long-term functional safety compliance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ110A-E3/5A | Commercial-grade version; same electrical specs but not AEC-Q101 qualified | Approved for industrial/commercial use only; not certified for automotive under-hood deployment | Select when AEC-Q101 is not required and cost optimization is prioritized |
| SMAJ110AHM3/5A | Halogen-free, RoHS-compliant variant with identical electrical and thermal ratings | Meets stricter environmental mandates (e.g., EU automotive ELV directive); same footprint and assembly process | Choose for halogen-free compliance without design or layout changes |
Compared with SMAJ110AHE3/5A, the E3/5A alternative lacks automotive qualification but offers identical clamping performance at lower cost, while HM3/5A delivers identical protection with halogen-free materials - enabling direct substitution where regulatory or environmental requirements differ.
Availability
SMAJ110AHE3/5A is available at Aetrix Electronics and suitable for automotive electronic control units, industrial motor drives, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ110AHE3/5A 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMAJ series is engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 compliance, and precise clamping are critical.
FAQ
What is the clamping voltage of SMAJ110AHE3/5A at its rated peak pulse current?
The SMAJ110AHE3/5A clamps to a maximum of 177 V when subjected to its specified peak pulse current of 1.7 A under the standard 10/1000 μs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during surge events - a critical parameter for ensuring downstream ICs remain within absolute maximum ratings.
Is SMAJ110AHE3/5A suitable for automotive applications?
Yes, SMAJ110AHE3/5A is AEC-Q101 qualified, making it suitable for automotive applications including engine control modules, body electronics, and ADAS systems. Its qualification covers temperature cycling, highly accelerated life testing, and ESD robustness - confirming reliability in demanding under-hood and chassis-mounted environments where SMAJ110AHE3/5A operates continuously from –55 °C to +150 °C.
What does the "HE3" suffix indicate in SMAJ110AHE3/5A?
The "HE3" suffix in SMAJ110AHE3/5A denotes RoHS-compliant construction with AEC-Q101 qualification. "H" indicates automotive grade, "E3" specifies RoHS-compliant matte tin plating, and the "/5A" denotes packaging in 13-inch tape-and-reel format with 7500 units per reel - distinguishing it from commercial (E3) or halogen-free automotive (HM3) variants.
How does SMAJ110AHE3/5A differ from bidirectional TVS diodes like SMAJ110CA?
SMAJ110AHE3/5A is unidirectional and conducts only in reverse bias above VBR, with polarity-sensitive mounting (cathode to protected line). In contrast, SMAJ110CA is bidirectional and symmetric - clamping in both directions with no polarity marking. SMAJ110AHE3/5A is selected for DC power rail protection where forward conduction must be blocked; SMAJ110CA suits AC-coupled or dual-rail signal lines.
What PCB layout considerations apply to SMAJ110AHE3/5A for optimal thermal performance?
For optimal thermal performance, SMAJ110AHE3/5A should be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Vishay's recommended pad layout. This minimizes thermal resistance (RθJA = 120 °C/W typical) and prevents localized overheating during repetitive surge events - especially important in automotive applications where ambient temperatures exceed 100 °C.
SMAJ110AHE3/5A 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMAJ110AHE3/5A FAQ
1.How can I place an order for SMAJ110AHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ110AHE3/5A 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 SMAJ110AHE3/5A reliable?
The price and inventory of SMAJ110AHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ110AHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ110AHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ110AHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ110AHE3/5A?
SMAJ110AHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ110AHE3/5A 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 SMAJ110AHE3/5A?
For technical support, including SMAJ110AHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ110AHE3/5A requirements.
6.How does Aetrix verify that SMAJ110AHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ110AHE3/5A 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 SMAJ110AHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ110AHE3/5A?
All SMAJ110AHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ110AHE3/5A, 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 SMAJ110AHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ110AHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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