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Vishay General Semiconductor - Diodes Division SMAJ110-E3/5A
- Part No.:
- SMAJ110-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ110-E3/5A.pdf
- Description:
- TVS DIODE 110VWM 196VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,109
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Product details
Overview
SMAJ110-E3/5A from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping voltage transients on power and signal lines. It features 110 V stand-off voltage (VWM), 196 V maximum clamping voltage (VC) at 1.5 A peak pulse current (IPPM), 400 W peak pulse power (10/1000 µs waveform), and operates across –55 °C to +150 °C junction temperature range. It protects MOSFETs and ICs in industrial power supplies against inductive switching surges.
For engineers reviewing the SMAJ110-E3/5A datasheet, SMAJ110-E3/5A pinout, SMAJ110-E3/5A application, or SMAJ110-E3/5A equivalent, this page delivers verified electrical specs, clamping behavior under surge conditions, thermal resistance data (RθJA = 120 °C/W), RoHS-compliant packaging details, and direct alternatives with documented parameter differences.
Technical Context
This unidirectional TVS diode uses a glass-passivated silicon junction optimized for fast response (<1 ps) and low incremental surge resistance. Its breakdown voltage (VBR) is specified at 122–149 V with 1 mA test current, ensuring reliable triggering above 110 V stand-off while maintaining <1 µA leakage at rated VWM.
Rated for 40 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), it supports high-energy transient suppression in DC power rails. Thermal design is guided by RθJL = 30 °C/W (junction-to-lead) and MSL Level 1 moisture sensitivity per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 110 V - Maximum continuous reverse operating voltage before clamping begins |
| VC @ IPPM | 196 V - Clamped voltage during 1.5 A 10/1000 µs surge; defines worst-case overvoltage seen by protected circuit |
| PPPM | 400 W - Peak pulse power handling capability under standard 10/1000 µs waveform; derates to 300 W above 78 V |
| IPPM | 1.5 A - Peak surge current corresponding to VC; used to size PCB copper pads (0.2 × 0.2″ recommended) |
| TJ Range | –55 °C to +150 °C - Operating and storage junction temperature range; supports industrial and automotive under-hood environments |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance; informs heatsinking requirements when mounted on standard FR-4 |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, matte tin-plated leads, RoHS-compliant, MSL Level 1, 260 °C solder dip rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased anode connection point | Connected to protected line; conducts during overvoltage to shunt surge current to ground |
| Anode | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping path during transient |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR and low leakage over temperature and lifetime; eliminates passivation-related drift |
| 400 W peak pulse power (10/1000 µs) | Supports robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12–48 V systems |
| Low clamping ratio (VC/VWM = 1.78) | Minimizes overvoltage stress on downstream components compared to higher-ratio TVS devices |
| MSL Level 1 rating | Enables standard SMT reflow without baking; compatible with automated placement and lead-free assembly |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Line Protection |
|---|---|
|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp transients before they reach upstream rectifier and bulk capacitor. Use Value: Limits voltage excursion to ≤196 V during 1.5 A surge, preventing damage to 200 V-rated electrolytic capacitors and bridge rectifiers. |
Use Scenario: CAN_H/CAN_L lines in BCM subjected to ISO 7637-2 Pulse 1 and Pulse 2a transients during vehicle operation. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; SMAJ110-E3/5A used on 12 V auxiliary power rail feeding CAN transceiver ICs. Use Value: Withstands 40 A surge (8.3 ms) without failure, maintaining integrity of 5 V LDO regulators powering CAN PHY layers. |
| Telecom AC-DC Adapter Secondary-Side Overvoltage Clamp | Consumer Appliance Motor Drive Board Snubber |
|
Use Scenario: Output rectification stage of 48 V telecom adapter where secondary-side transients threaten synchronous rectifier MOSFETs. IC Role / Device Role / Timing Role: TVS connected cathode-to-rail, anode-to-ground to clamp flyback spikes induced by transformer leakage inductance. Use Value: 120 °C/W RθJA allows safe operation without heatsink at ambient ≤70 °C; clamps within 1 ps to protect 60 V-rated GaN FETs. |
Use Scenario: H-bridge driver board in smart washing machine, where brushed motor commutation generates >100 V spikes on 24 V logic supply. IC Role / Device Role / Timing Role: Mounted directly at motor driver IC VDD pin to suppress coupled noise before it disrupts gate drivers or microcontroller I/O. Use Value: 1 µA max leakage at 110 V ensures no measurable quiescent current drain; enables battery-backed standby mode 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 | VBR min/max tighter (122–135 V); lower VC = 177 V; same VWM and PPPM | Better clamping margin for 100–110 V nominal rails where headroom below 177 V is critical | Select SMAJ110A-E3/5A when protecting 100 V-rated components requiring lower clamping overshoot |
| SMCJ110A-E3/57T | DO-214AB (SMC) package; higher PPPM = 1500 W; VC = 187 V at 6.5 A; larger footprint | Required for higher-energy transients (e.g., IEC 61000-4-5 Level 5) where 400 W is insufficient | Choose SMCJ110A-E3/57T only when surge energy exceeds SMAJ110-E3/5A rating and PCB layout accommodates larger SMC package |
Compared with SMAJ110-E3/5A, the SMAJ110A-E3/5A offers improved clamping consistency at the cost of slightly reduced surge current tolerance, while the SMCJ110A-E3/57T trades compactness for 3.75× higher pulse power-making it suitable only when energy demands exceed DO-214AC limits.
Availability
SMAJ110-E3/5A is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, telecom adapters, and consumer appliance motor control requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ110-E3/5A 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 performance in harsh environments.
The SMAJ series is engineered for surface-mount transient suppression in space-constrained, high-reliability applications-including industrial automation, automotive subsystems, and communications infrastructure-where consistent clamping and JEDEC-compliant manufacturability are essential.
FAQ
What is the maximum clamping voltage of SMAJ110-E3/5A under standard surge conditions?
The SMAJ110-E3/5A exhibits a maximum clamping voltage (VC) of 196 V when subjected to its rated peak pulse current of 1.5 A using the 10/1000 µs waveform. This value is measured at TA = 25 °C with devices mounted on 0.2 × 0.2″ copper pads per Vishay Document 88390. The clamping voltage defines the upper voltage limit imposed on protected circuitry during transient events, and SMAJ110-E3/5A maintains this specification across its full operating temperature range.
Is SMAJ110-E3/5A unidirectional or bidirectional, and how is polarity identified?
SMAJ110-E3/5A is a unidirectional TVS diode, indicated by the absence of "C" or "CA" suffix in its part number. Polarity is marked by a cathode band on the DO-214AC (SMA) package body; the banded end connects to the protected line, while the unmarked end connects to ground. This configuration allows conduction only during positive transients relative to ground, making SMAJ110-E3/5A appropriate for DC rail protection where reverse voltage is not expected.
What is the surge current rating of SMAJ110-E3/5A, and how does it relate to IEC 61000-4-5 testing?
SMAJ110-E3/5A is rated for 1.5 A peak pulse current (IPPM) under the 10/1000 µs waveform, corresponding to its 400 W peak pulse power rating. While this rating does not directly map to IEC 61000-4-5 open-circuit voltage levels, it supports protection against Level 3 (2 kV) surges on 24–48 V systems when combined with appropriate series impedance. For Level 4 (4 kV) compliance, designers must verify system-level clamping performance using actual line impedance and layout parasitics-not solely relying on SMAJ110-E3/5A's IPPM.
Does SMAJ110-E3/5A meet automotive qualification standards?
No, SMAJ110-E3/5A is the commercial-grade variant (E3 suffix) and is not AEC-Q101 qualified. For automotive applications, Vishay specifies the HE3 suffix (e.g., SMAJ110AHE3/5A), which undergoes additional stress testing including temperature cycling, humidity bias, and accelerated life validation. SMAJ110-E3/5A is rated for industrial and telecom use with operating temperature up to +150 °C but lacks the extended reliability documentation required for automotive ECUs or body electronics.
What is the thermal resistance profile of SMAJ110-E3/5A, and how does it impact PCB layout?
SMAJ110-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W. These values assume mounting on minimum recommended 0.2 × 0.2″ copper pads per terminal. To maintain safe junction temperatures under repetitive surge conditions, designers should avoid excessive trace length between the device and ground plane, minimize thermal isolation, and consider adding thermal vias beneath the pads-especially in high-ambient environments exceeding 70 °C. SMAJ110-E3/5A's RθJA confirms suitability for standard FR-4 without dedicated heatsinking in most industrial applications.
SMAJ110-E3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 110V
- Voltage - Breakdown (Min):
- 122V
- Voltage - Clamping (Max) @ Ipp:
- 196V
- Current - Peak Pulse (10/1000µs):
- 1.5A
- 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)
SMAJ110-E3/5A FAQ
1.How can I place an order for SMAJ110-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ110-E3/5A 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 SMAJ110-E3/5A reliable?
The price and inventory of SMAJ110-E3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ110-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ110-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ110-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ110-E3/5A?
SMAJ110-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ110-E3/5A 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 SMAJ110-E3/5A?
For technical support, including SMAJ110-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ110-E3/5A requirements.
6.How does Aetrix verify that SMAJ110-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ110-E3/5A 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 SMAJ110-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ110-E3/5A?
All SMAJ110-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ110-E3/5A, 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 SMAJ110-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ110-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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