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Vishay General Semiconductor - Diodes Division SMAJ13A-E3/5A
- Part No.:
- SMAJ13A-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13A-E3/5A.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ13A-E3/5A from Vishay General Semiconductor is a unidirectional 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 13 V standoff voltage (VWM), 14.4–15.9 V breakdown voltage (VBR) at 1 mA, 21.5 V maximum clamping voltage (VC) at 18.6 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 SMAJ13A-E3/5A datasheet, SMAJ13A-E3/5A pinout, SMAJ13A-E3/5A application, or SMAJ13A-E3/5A equivalent, key selection criteria include unidirectional polarity, 120 °C/W junction-to-ambient thermal resistance, AEC-Q101 qualification eligibility (via HE3 suffix variants), RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a fast-acting shunt protector that clamps transient overvoltages above its breakdown threshold while maintaining low leakage (<1.0 μA at 13 V). Its glass-passivated junction enables stable performance across -55 °C to +150 °C operating temperature range and supports repetitive surge events at 0.01% duty cycle.
The device uses a single P-N junction structure optimized for low incremental surge resistance and sub-nanosecond response time. It meets UL 497B recognition (QVGQ2) and J-STD-020 MSL Level 1 moisture sensitivity, with terminals solderable per J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - Maximum continuous reverse operating voltage before significant conduction begins |
| VBR (min/max) | 14.4 V / 15.9 V at 1 mA - Ensures reliable triggering above normal operating voltage with margin |
| VC @ IPPM | 21.5 V at 18.6 A - Clamped voltage during 10/1000 μs surge, limiting stress on downstream components |
| PPPM | 400 W - Peak pulse power handling capability under standard 10/1000 μs waveform |
| IFSM | 40 A - Single half-sine surge current rating (8.3 ms), supporting inrush and switching transients |
| TJ max. | +150 °C - Enables use in high-temperature environments such as engine control units and power converters |
| RθJA | 120 °C/W - Thermal resistance determines required PCB copper area for sustained power dissipation |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with cathode band marking. Dimensions: 4.50 mm × 2.79 mm × 2.29 mm (L × W × H); weight: 0.064 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry (unidirectional) | Connected to lower-potential side of protected line; conducts during forward surge or ESD event |
| Cathode | Reverse-biased terminal (marked with band) | Connected to higher-potential rail; initiates avalanche conduction when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Supports robust protection against ISO 7637-2 Load Dump and IEC 61000-4-5 surge events in 12 V systems |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, improving clamping precision |
| Glass passivated chip junction | Ensures long-term reliability and stable VBR |
| MSL Level 1, 260 °C reflow compatible | Enables single-pass lead-free reflow without moisture-related delamination risk |
| AEC-Q101 qualification path | HE3/HM3 variants available for automotive applications requiring qualified components |
Applications
| Automotive Power Supply Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VBAT and GND, triggered only during overvoltage events. Use Value: Limits clamped voltage to 21.5 V, safeguarding 24 V-rated regulators and microcontrollers downstream. | Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS connected between signal line and ground, responding within nanoseconds. Use Value: Sub-1 μA leakage at 13 V preserves signal integrity; 21.5 V clamping prevents ADC input saturation. |
| Consumer Power Adapter Input Stage | MOSFET Gate Driver Protection |
Use Scenario: Suppressing surges on AC/DC adapter primary-side DC bus caused by lightning-induced coupling. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing energy before it reaches bulk capacitor and controller IC. Use Value: 400 W rating handles repetitive 10/1000 μs surges without degradation; RoHS-compliant finish ensures compliance. | Use Scenario: Preventing gate oxide damage in high-side N-channel MOSFETs due to Miller-induced voltage spikes. IC Role / Device Role / Timing Role: Fast-clamping TVS placed between gate and source, conducting only during overvoltage excursions. Use Value: 18.6 A peak current capacity accommodates fast-switching gate drive transients; 120 °C/W RθJA allows thermal design with minimal copper. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13CA-E3/5A | Bidirectional variant; symmetric VBR (14.4–15.9 V) in both polarities; same VC, PPPM, and package | Required where AC-coupled or dual-polarity signal lines need protection (e.g., RS-485, CAN bus) | Select SMAJ13CA-E3/5A only if bidirectional clamping is needed; SMAJ13A-E3/5A is optimal for DC power rails with defined polarity. |
| SMBJ13A-E3/52 | Same electrical specs but in larger SMB (DO-214AA) package; 100 °C/W RθJA; 600 W PPPM rating | Used where higher surge margin or improved thermal dissipation is required, e.g., under-hood automotive modules | Choose SMBJ13A-E3/52 when board space permits and 600 W surge headroom or lower thermal resistance is critical. |
Compared with SMAJ13CA-E3/5A and SMBJ13A-E3/52, the SMAJ13A-E3/5A offers optimal footprint efficiency for unidirectional DC protection, balancing 400 W surge capability, 120 °C/W thermal resistance, and full RoHS compliance in the compact SMA package - making it ideal for space-constrained consumer and industrial designs.
Availability
SMAJ13A-E3/5A is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and consumer power adapter designs requiring stable component supply, consistent parametric performance, and full traceability.
Supply support for SMAJ13A-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 platform, engineered specifically for high-energy transient suppression in automotive, industrial, and computing systems where fast response, precise clamping, and AEC-Q101 readiness are essential.
FAQ
What is the maximum clamping voltage of the SMAJ13A-E3/5A under a 10/1000 μs surge?
The SMAJ13A-E3/5A has a maximum clamping voltage (VC) of 21.5 V at 18.6 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per Figure 1 in Vishay document 88390 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ13A-E3/5A maintains this clamping performance across its rated temperature range and is validated for repetitive operation at 0.01% duty cycle.
Is the SMAJ13A-E3/5A suitable for automotive applications?
The SMAJ13A-E3/5A itself is commercial-grade (E3 suffix), but Vishay offers AEC-Q101-qualified versions under HE3 and HM3 suffixes (e.g., SMAJ13AHE3_A/I). While the SMAJ13A-E3/5A shares identical electrical and thermal characteristics, automotive qualification requires explicit HE3/HM3 ordering codes. For non-safety-critical subsystems like infotainment or body electronics, the SMAJ13A-E3/5A may be used pending system-level validation - however, full compliance mandates the HE3 variant.
How does the SMAJ13A-E3/5A differ from the SMAJ13CA-E3/5A?
The SMAJ13A-E3/5A is unidirectional with cathode marking and conducts only in reverse bias above VBR, whereas the SMAJ13CA-E3/5A is bidirectional with symmetrical breakdown in both directions and no polarity marking. Both share identical VWM (13 V), VBR (14.4–15.9 V), VC (21.5 V), and PPPM (400 W), but the SMAJ13CA-E3/5A is required for AC signal lines or differential buses like CAN or RS-485 where voltage polarity reverses.
What is the thermal resistance and recommended PCB layout for the SMAJ13A-E3/5A?
The SMAJ13A-E3/5A has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended pad layout - defined as 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repeated surges, designers should ensure adequate copper area and avoid thermal isolation. The SMAJ13A-E3/5A is rated for TJ up to +150 °C and meets MSL Level 1 for lead-free reflow.
Does the SMAJ13A-E3/5A meet UL safety standards?
Yes, the SMAJ13A-E3/5A is Underwriters Laboratory recognized under UL 497B (QVGQ2) for protector classification, with file number E136766 covering both unidirectional and bidirectional variants. This certification confirms suitability for use in secondary-circuit surge protection applications in end equipment sold in North America, including consumer electronics and industrial controls. Compliance applies to the base device design, independent of tape-and-reel packaging format.
SMAJ13A-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 18.6A
- 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)
SMAJ13A-E3/5A FAQ
1.How can I place an order for SMAJ13A-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13A-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 SMAJ13A-E3/5A reliable?
The price and inventory of SMAJ13A-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 SMAJ13A-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ13A-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13A-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13A-E3/5A?
SMAJ13A-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13A-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 SMAJ13A-E3/5A?
For technical support, including SMAJ13A-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13A-E3/5A requirements.
6.How does Aetrix verify that SMAJ13A-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ13A-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 SMAJ13A-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ13A-E3/5A?
All SMAJ13A-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13A-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 SMAJ13A-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ13A-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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