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Vishay General Semiconductor - Diodes Division SMAJ13-E3/5A
- Part No.:
- SMAJ13-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13-E3/5A.pdf
- Description:
- TVS DIODE 13VWM 23.8VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,606
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Product details
Overview
SMAJ13-E3/5A from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping voltage transients on power and signal lines. It features a 13 V stand-off voltage (VWM), 23.8 V maximum clamping voltage (VC) at 16.8 A peak pulse current (IPPM), and 400 W peak pulse power (10/1000 µs waveform), making it suitable for protecting MOSFETs, ICs, and sensor interfaces in industrial and automotive electronics.
For engineers reviewing the SMAJ13-E3/5A datasheet, SMAJ13-E3/5A pinout, SMAJ13-E3/5A application, or SMAJ13-E3/5A equivalent, key selection criteria include its 13 V reverse stand-off rating, low 1.0 µA leakage at VWM, 150 °C junction temperature capability, RoHS-compliant matte tin terminals, and MSL Level 1 moisture sensitivity per J-STD-020.
Technical Context
The SMAJ13-E3/5A operates as a unidirectional avalanche diode with glass-passivated junction, enabling fast response to transient overvoltages. Its breakdown voltage (VBR) is specified between 14.4 V and 17.6 V at 1.0 mA test current, and it exhibits excellent clamping performance with only 23.8 V across the device at 16.8 A surge current.
Thermally, it delivers RθJA = 120 °C/W and RθJL = 30 °C/W, supporting reliable operation under repetitive surge conditions when mounted on 0.2 × 0.2" copper pads. It meets JESD201 Class 1A whisker resistance and is rated for -55 °C to +150 °C operating and storage temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VC @ IPPM | 23.8 V - Clamped voltage during 16.8 A 10/1000 µs surge; ensures downstream ICs see no more than this voltage during ESD or load-switching events. |
| IPPM | 16.8 A - Peak surge current capability with 10/1000 µs waveform; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) line surges. |
| PPPM | 400 W - Peak pulse power dissipation; enables robust protection without thermal runaway under short-duration transients. |
| ID @ VWM | 1.0 µA - Reverse leakage at 13 V; negligible loading on 12 V supply rails or high-impedance signal paths. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive or enclosed industrial enclosures. |
| Package | DO-214AC (SMA) - Standard surface-mount outline with cathode band marking; compatible with automated pick-and-place and reflow soldering at 260 °C peak. |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with two leads; cathode identified by a single band at one end. Leads are matte tin-plated, solderable per J-STD-002 and JESD22-B102, and meet JESD201 Class 1A whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point for unidirectional TVS | Connected to ground or low-impedance return path; completes clamping loop during positive transients on cathode side. |
| Cathode (banded end) | High-side connection point for unidirectional TVS | Connected to protected line (e.g., 12 V rail or signal); conducts avalanche current to anode when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable, repeatable avalanche characteristics and long-term reliability under repeated surge stress. |
| 400 W peak pulse power (10/1000 µs) | Provides higher surge handling than standard SMAJ-A series above 78 V; maintains full rating at 13 V due to lower VWM. |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and standard reflow profile without baking; simplifies manufacturing logistics. |
| RoHS-compliant, commercial-grade (E3 suffix) | Meets EU Directive 2002/95/EC; suitable for consumer, industrial, and telecom applications where AEC-Q101 is not required. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ESD), improving protection margin for sensitive CMOS inputs. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 12 V rail and chassis ground to clamp positive surges up to 100 V. Use Value: Limits voltage seen by downstream DC-DC converters and microcontrollers to ≤23.8 V during 16.8 A surges, preventing latch-up or permanent damage. |
Use Scenario: Shielding analog output lines of pressure or temperature sensors from ESD and cable discharge events. IC Role / Device Role / Timing Role: TVS connected between sensor signal line and ground to suppress ±8 kV contact ESD per IEC 61000-4-2. Use Value: Maintains signal integrity with only 1.0 µA leakage at 13 V, avoiding offset errors in 12-bit ADC front-ends. |
| Telecom Line Card Surge Protection | Consumer Power Adapter Input Stage |
Use Scenario: Safeguarding Ethernet PHY power pins and auxiliary bias rails from lightning-induced surges on PoE-powered equipment. IC Role / Device Role / Timing Role: Primary clamping device on 3.3 V or 5 V auxiliary supplies feeding PHY ICs. Use Value: Responds in <1 ps to fast transients and clamps within 23.8 V, preserving PHY functionality during 10/1000 µs surges up to 400 W. |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters for USB-C PD and smart home devices. IC Role / Device Role / Timing Role: Unidirectional TVS on regulated 5 V or 9 V output to absorb capacitor discharge or regulator fault energy. Use Value: Withstands 40 A non-repetitive forward surge (IFSM), providing fail-safe protection even during output short-circuit recovery events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13A-E3/5A | Lower VBR range (14.4–15.9 V), tighter tolerance; clamps at 21.5 V @ 18.6 A. | Better suited for precision 12 V systems requiring lower clamping voltage and tighter VWM control. | Select SMAJ13A-E3/5A when design requires reduced clamping overshoot and tighter VBR distribution. |
| SMBJ13-E3/52 | Same VWM/VC specs but in larger DO-214AA (SMB) package; 600 W PPPM. | Higher surge capacity and better thermal dissipation; used where board space allows and higher reliability margin is needed. | Choose SMBJ13-E3/52 for industrial motor drives or outdoor telecom where 600 W surge rating improves field failure MTBF. |
Compared with SMAJ13-E3/5A, SMAJ13A-E3/5A offers lower clamping voltage at the cost of slightly reduced surge current headroom, while SMBJ13-E3/52 trades compact size for higher power handling and thermal robustness-making each optimal for distinct layout, reliability, and system-level surge compliance requirements.
Availability
SMAJ13-E3/5A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface protection, telecom line card surge protection, and consumer power adapter input stage applications requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMAJ13-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for fast, low-clamping transient suppression in space-constrained surface-mount designs across automotive, industrial, and communications infrastructure.
FAQ
What is the maximum clamping voltage of the SMAJ13-E3/5A under a 10/1000 µs surge?
The SMAJ13-E3/5A has a maximum clamping voltage (VC) of 23.8 V when subjected to its rated peak pulse current of 16.8 A with a 10/1000 µs waveform. This value is guaranteed per the Vishay datasheet (Document Number 88390, Rev. 29-Oct-08) and represents the upper limit of voltage that will appear across the SMAJ13-E3/5A during standardized surge testing, ensuring predictable protection behavior for downstream circuitry.
Is the SMAJ13-E3/5A unidirectional or bidirectional?
The SMAJ13-E3/5A is a unidirectional Transient Voltage Suppressor, indicated by the absence of "C" or "CA" suffix and confirmed by its polarity marking: a single cathode band on the DO-214AC (SMA) package. It protects against positive-going transients on the cathode side relative to anode (ground), and must be oriented accordingly in-circuit-unlike bidirectional variants such as SMAJ13CA which suppress both polarities.
What does the "E3/5A" suffix mean in SMAJ13-E3/5A?
The "E3" denotes RoHS-compliant, commercial-grade construction meeting JEDEC JESD201 Class 1A whisker resistance, while "/5A" specifies packaging in 13-inch diameter plastic tape and reel containing 7500 units. This differs from "/61", which indicates 7-inch reels of 1800 units. The E3/5A configuration ensures compatibility with high-volume SMT assembly lines and satisfies environmental compliance requirements for non-automotive applications.
Can SMAJ13-E3/5A replace SMAJ13A-E3/5A in an existing design?
SMAJ13-E3/5A and SMAJ13A-E3/5A are not direct replacements due to differences in breakdown voltage tolerance: SMAJ13-E3/5A has VBR = 14.4–17.6 V, whereas SMAJ13A-E3/5A is tighter at 14.4–15.9 V. This results in a higher clamping voltage (23.8 V vs. 21.5 V) and different leakage and dynamic impedance behavior. Substitution requires validation of system-level surge margin and may necessitate layout or firmware adjustments to maintain protection integrity for the SMAJ13-E3/5A.
What is the thermal resistance of SMAJ13-E3/5A, and how does it affect PCB layout?
The SMAJ13-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead (RθJL) of 30 °C/W when mounted on minimum recommended 0.2 × 0.2" (5.0 × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures during repetitive surges, designers must provide adequate copper area and avoid excessive trace length or isolation-especially critical in high-temperature environments like automotive under-hood applications where the SMAJ13-E3/5A operates up to +150 °C.
SMAJ13-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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 23.8V
- Current - Peak Pulse (10/1000µs):
- 16.8A
- 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)
SMAJ13-E3/5A FAQ
1.How can I place an order for SMAJ13-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13-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 SMAJ13-E3/5A reliable?
The price and inventory of SMAJ13-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 SMAJ13-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ13-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13-E3/5A?
SMAJ13-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13-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 SMAJ13-E3/5A?
For technical support, including SMAJ13-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13-E3/5A requirements.
6.How does Aetrix verify that SMAJ13-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ13-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 SMAJ13-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ13-E3/5A?
All SMAJ13-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13-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 SMAJ13-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ13-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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