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Vishay General Semiconductor - Diodes Division SMAJ10-E3/5A
- Part No.:
- SMAJ10-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ10-E3/5A.pdf
- Description:
- TVS DIODE 10VWM 18.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,268
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Product details
Overview
SMAJ10-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping transient overvoltages on power and signal lines. It features a 10 V stand-off voltage (VWM), 18.8 V maximum clamping voltage (VC) at 21.3 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for protecting MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the SMAJ10-E3/5A datasheet, SMAJ10-E3/5A pinout, SMAJ10-E3/5A application, or SMAJ10-E3/5A equivalent, key selection criteria include its unidirectional polarity, 1.0 µA max reverse leakage at VWM, 11.1–13.6 V breakdown range, 150 °C max junction temperature, and RoHS-compliant matte tin-plated leads solderable per J-STD-002.
Technical Context
This TVS diode operates as a voltage-clamping protection device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold (VBR = 11.1–13.6 V at 10 mA). Its low incremental surge resistance ensures rapid energy diversion during transients induced by inductive switching or ESD events.
The SMAJ10-E3/5A is rated for 400 W peak pulse power (derated to 300 W above 78 V), supports 40 A non-repetitive forward surge current (8.3 ms half-sine), and exhibits typical thermal resistance of 120 °C/W (junction-to-ambient) on 0.2 × 0.2" copper pads - confirming suitability for compact PCB layouts with moderate thermal management.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 10 V - maximum continuous reverse operating voltage before significant leakage |
| Breakdown Voltage (VBR) | 11.1–13.6 V at 10 mA - defines onset of avalanche clamping behavior |
| Clamping Voltage (VC) | 18.8 V at 21.3 A - maximum voltage seen by protected circuit during 10/1000 µs surge |
| Peak Pulse Power (PPPM) | 400 W - energy-handling capability under standard 10/1000 µs transient waveform |
| Reverse Leakage (ID) | ≤ 1.0 µA at 10 V - minimal standby power loss and signal integrity impact |
| Junction Temperature Range | −55 °C to +150 °C - enables operation in harsh industrial and under-hood automotive environments |
| Package | DO-214AC (SMA) - surface-mount footprint compatible with automated assembly and IPC-7351B land patterns |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads; cathode indicated by band on one end; terminals are anode and cathode - no internal pins, two-terminal device.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential side of protected line; used only in uni-directional configuration |
| Cathode (banded end) | Current exit terminal in forward bias; clamping node in reverse bias | Connected to higher-potential side (e.g., VCC or signal line); conducts avalanche current during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 3 surges without derating in most board-level implementations |
| Low clamping ratio (VC/VWM = 1.88) | Minimizes stress on downstream components during clamping - critical for 3.3 V or 5 V logic interfaces |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow at 260 °C peak without baking - simplifies SMT production flow |
| RoHS-compliant & JESD201 Class 1A whisker tested | Meets automotive and industrial reliability requirements for long-term solder joint integrity |
| Glass-passivated junction | Ensures stable VBR and low leakage across temperature and lifetime - improves field failure resilience |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V supply rails in body control modules from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input to clamp spikes up to ±100 V. Use Value: Limits rail voltage to ≤18.8 V during 21.3 A surge, preventing damage to LDOs and microcontrollers rated for 20 V absolute max. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC analog inputs. IC Role / Device Role / Timing Role: TVS mounted at sensor connector to shunt ESD and cable-induced transients before reaching precision amplifier front-end. Use Value: 1.0 µA leakage at 10 V avoids gain error in µA-level current-loop sensors; fast response preserves signal fidelity. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
Use Scenario: Secondary protection on VBUS line of USB 2.0 ports in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Downstream clamping device after primary polymer PTC, handling residual 8 kV contact ESD per IEC 61000-4-2. Use Value: 18.8 V clamping ensures USB PHY ICs (rated 20 V abs max) remain within safe operating area during repeated ESD events. |
Use Scenario: Primary surge protection on twisted-pair DSL lines exposed to lightning-induced surges in residential gateways. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices on tip/ring lines referenced to chassis ground, absorbing common-mode transients. Use Value: 400 W rating sustains multiple 10/1000 µs surges up to 1 kV without degradation - validated per GR-1089-CORE. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10A-E3/5A | Lower VBR range (11.1–12.3 V), tighter tolerance; 17.0 V clamping at 23.5 A | Better suited for 3.3 V systems where lower clamping margin is critical | Select SMAJ10A-E3/5A when design requires tighter VBR control and lower VC under same IPPM |
| SMBJ10-E3/52 | Same VWM/VC specs but in larger DO-214AA (SMB) package; 600 W PPPM | Higher power handling and thermal mass - preferred for high-reliability industrial power supplies | Choose SMBJ10-E3/52 when board layout allows larger footprint and surge duty cycle exceeds 0.01 % |
Compared with SMAJ10-E3/5A, SMAJ10A-E3/5A offers improved clamping consistency for low-voltage rails, while SMBJ10-E3/52 provides greater thermal margin and surge endurance - both require PCB footprint revision and are not pin-compatible replacements.
Availability
SMAJ10-E3/5A is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, consumer USB power delivery, and telecom line interface designs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMAJ10-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, rectifiers, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The SMAJ series was engineered for cost-effective, high-volume transient suppression in space-constrained surface-mount applications - targeting automotive, industrial, and communications equipment where robustness and manufacturability are essential.
FAQ
What is the polarity configuration of SMAJ10-E3/5A?
SMAJ10-E3/5A is a unidirectional TVS diode, meaning it functions as a Zener-like clamp in reverse bias and conducts like a standard diode in forward bias. The cathode is marked by a band on the package body. It must be oriented with cathode toward the higher-potential side of the protected line - for example, cathode to VCC and anode to ground - to ensure proper clamping during overvoltage events. This configuration differs from bi-directional variants like SMAJ10CA.
Does SMAJ10-E3/5A meet automotive qualification standards?
SMAJ10-E3/5A is RoHS-compliant and meets JESD201 Class 1A whisker testing, but it is not AEC-Q101 qualified. For automotive applications requiring AEC-Q101 certification, the HE3-suffix variant (e.g., SMAJ10HE3/5A) should be selected - it shares identical electrical specs but adds high-reliability process validation and extended temperature screening per AEC-Q101.
What is the maximum clamping voltage of SMAJ10-E3/5A under surge conditions?
The maximum clamping voltage (VC) of SMAJ10-E3/5A is 18.8 V, measured at a peak pulse current (IPPM) of 21.3 A using the standardized 10/1000 µs double-exponential waveform. This value represents the highest voltage the protected circuit will experience during such a transient - critical for ensuring compatibility with downstream ICs rated for 20 V absolute maximum ratings.
Can SMAJ10-E3/5A be used in bi-directional protection circuits?
No - SMAJ10-E3/5A is strictly unidirectional and lacks symmetrical breakdown characteristics. For bi-directional transient suppression (e.g., AC signal lines or differential pairs), the SMAJ10CA or SMAJ10C variant must be used. These CA-suffix parts exhibit matched breakdown in both polarities and are explicitly characterized for bidirectional operation per the datasheet's "DEVICES FOR BI-DIRECTION APPLICATIONS" section.
What is the thermal resistance of SMAJ10-E3/5A, and how does it affect layout?
SMAJ10-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2 × 0.2" (5.0 × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout per Figure 5; reducing pad size increases RθJA and risks exceeding 150 °C junction temperature during repetitive surges. Layout must maintain full copper exposure under both terminals and avoid thermal isolation.
SMAJ10-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):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 18.8V
- Current - Peak Pulse (10/1000µs):
- 21.3A
- Power - Peak Pulse:
- 400W
- 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)
SMAJ10-E3/5A FAQ
1.How can I place an order for SMAJ10-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ10-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 SMAJ10-E3/5A reliable?
The price and inventory of SMAJ10-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 SMAJ10-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ10-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ10-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ10-E3/5A?
SMAJ10-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ10-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 SMAJ10-E3/5A?
For technical support, including SMAJ10-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ10-E3/5A requirements.
6.How does Aetrix verify that SMAJ10-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ10-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 SMAJ10-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ10-E3/5A?
All SMAJ10-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ10-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 SMAJ10-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ10-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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