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Vishay General Semiconductor - Diodes Division SMAJ13CA-E3/5A
- Part No.:
- SMAJ13CA-E3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13CA-E3/5A.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ13CA-E3/5A from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal or power lines. It features a 13 V standoff voltage (VWM), 14.4–15.9 V breakdown voltage (VBR) at 1 mA, and clamps to ≤21.5 V at 18.6 A peak pulse current (IPPM) under 10/1000 μs waveform - suitable for protecting MOSFET gates, sensor interfaces, and automotive control modules against ESD and load-switching surges.
For engineers reviewing the SMAJ13CA-E3/5A datasheet, SMAJ13CA-E3/5A pinout, SMAJ13CA-E3/5A application, or SMAJ13CA-E3/5A equivalent, key selection criteria include bidirectional clamping capability, 400 W peak pulse power rating (≤78 V), AEC-Q101 qualification eligibility (via HE3/HM3 variants), low thermal resistance (RθJA = 120 °C/W), and compatibility with automated SMT assembly on standard PCB copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional CA construction, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM), while the SMA package supports high surge current handling (IFSM = 40 A, 8.3 ms half-sine) and meets MSL Level 1 reflow requirements (260 °C peak).
The device delivers precise clamping performance: at IPPM = 18.6 A (10/1000 μs), VC ≤ 21.5 V, resulting in <1.15× VWM clamping ratio - critical for safeguarding 12 V automotive electronics and industrial I/O circuits where overvoltage margin is tight. Its temperature coefficient of VBR is +0.084 %/°C, ensuring predictable drift across –55 °C to +150 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - maximum continuous reverse working voltage before significant leakage; defines safe operating ceiling for 12 V nominal systems. |
| VBR (min/max) | 14.4 V / 15.9 V at IT = 1 mA - verified breakdown threshold ensures reliable turn-on during transient events above system rail. |
| VC @ IPPM | ≤21.5 V at 18.6 A (10/1000 μs) - actual clamped voltage limits stress on downstream ICs during surge conditions. |
| PPPM | 400 W - peak pulse power handling capacity enables robust protection against IEC 61000-4-5 Level 3 surges. |
| IPPM | 18.6 A - maximum non-repetitive surge current supported with standard 0.2" × 0.2" copper pad layout. |
| RθJA | 120 °C/W - thermal resistance from junction to ambient determines derating needed for sustained power dissipation. |
| TJmax | +150 °C - maximum junction temperature allows operation in under-hood automotive or industrial environments. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as input/output for transient energy; no cathode band marking required per bidirectional design. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables compliance with IEC 61000-4-5 surge immunity testing up to 1 kV source impedance without external series impedance. |
| Glass passivated junction | Ensures long-term stability of VBR and low leakage (<1.0 μA at VWM) across temperature and lifetime. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow soldering without preconditioning or baking, reducing manufacturing complexity. |
| AEC-Q101 qualification option | HE3/HM3 variants meet automotive reliability standards for engine control, body electronics, and ADAS subsystems. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving protection fidelity. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply rails in junction boxes, fuse panels, and lighting control modules from load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly across power input to absorb >400 W surges within nanoseconds. Use Value: Prevents latch-up or destruction of PMICs and microcontrollers by limiting transient voltage to ≤21.5 V during 18.6 A surges. |
Use Scenario: Shielding analog and digital sensor outputs (e.g., CAN, LIN, or RS-485 transceivers) from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance TVS placed at connector entry point to shunt transients before reaching signal conditioning circuitry. Use Value: Maintains signal integrity with <1.0 μA leakage at 13 V, avoiding DC offset errors in precision sensor front-ends. |
| Consumer USB Power Delivery | Telecom Line Card Surge Protection |
|
Use Scenario: Safeguarding USB-C port VBUS lines against hot-plug transients and accidental 20 V misconnection events. IC Role / Device Role / Timing Role: Standoff-rated TVS deployed between VBUS and ground to clamp overvoltage before USB PD controller ICs. Use Value: Clamps 10/1000 μs surges to ≤21.5 V while surviving repeated 400 W pulses - critical for UL/IEC 62368-1 compliance. |
Use Scenario: Front-end protection of telecom line cards exposed to lightning-induced surges on twisted-pair or coaxial feeds. IC Role / Device Role / Timing Role: Bidirectional TVS used in parallel with gas discharge tubes (GDTs) to handle fast-rising components of hybrid surge waveforms. Use Value: Fast response time (<1 ns) and low VC/VWM ratio (1.65×) ensure secondary protection triggers before damage occurs to PHY ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13A-E3/5A | Unidirectional variant with cathode band marking; identical VWM, VBR, and VC specs but asymmetric conduction. | Required only when circuit topology mandates polarity-aware clamping (e.g., DC-biased signal lines). | Select SMAJ13A-E3/5A if protecting unidirectional power rails or signals referenced to ground with defined polarity. |
| SMBJ13CA-E3/52 | Same VWM/VBR ratings but SMB package (DO-214AA); 600 W PPPM rating and lower RθJA (90 °C/W). | Better suited for higher-energy surges or thermally constrained layouts where larger footprint is acceptable. | Choose SMBJ13CA-E3/52 when system-level surge tests exceed 400 W or board space allows larger SMB outline. |
Compared with SMAJ13A-E3/5A, the SMAJ13CA-E3/5A eliminates polarity dependency for AC-coupled or floating lines; versus SMBJ13CA-E3/52, it trades peak power headroom for smaller footprint and tighter board integration - making it optimal for space-constrained 12 V automotive modules and portable industrial sensors.
Availability
SMAJ13CA-E3/5A is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, consumer USB power delivery, and telecom line card surge protection requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMAJ13CA-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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SMAJ series was developed for high-reliability transient suppression in automotive, industrial, and communications infrastructure - delivering consistent clamping behavior, AEC-Q101 readiness, and robust SMT manufacturability.
FAQ
What is the standoff voltage rating of the SMAJ13CA-E3/5A?
The SMAJ13CA-E3/5A has a maximum reverse standoff voltage (VWM) of 13 V, meaning it remains in high-impedance state below this voltage and begins conducting only during overvoltage events exceeding its breakdown threshold. This rating makes SMAJ13CA-E3/5A ideal for protecting 12 V nominal systems where minimal leakage and precise clamping are required.
Does the SMAJ13CA-E3/5A have polarity markings on its package?
No - the SMAJ13CA-E3/5A is a bidirectional TVS diode and carries no cathode band or polarity marking. Its symmetrical internal structure allows either terminal to serve as input or output, simplifying PCB layout for AC-coupled or differential signal paths. This distinguishes SMAJ13CA-E3/5A from unidirectional variants like SMAJ13A-E3/5A, which feature a visible cathode band.
What is the peak pulse current rating for the SMAJ13CA-E3/5A under standard test conditions?
The SMAJ13CA-E3/5A supports a peak pulse current (IPPM) of 18.6 A when subjected to a 10/1000 μs waveform, measured with device mounted on 0.2" × 0.2" copper pads per JEDEC standards. This value corresponds directly to its 400 W peak pulse power rating and defines the maximum transient energy SMAJ13CA-E3/5A can safely divert without degradation.
Is the SMAJ13CA-E3/5A qualified for automotive applications?
The base SMAJ13CA-E3/5A is RoHS-compliant and commercial-grade; however, Vishay offers AEC-Q101 qualified versions under ordering codes SMAJ13CAHE3_X (RoHS + AEC-Q101) and SMAJ13CAHM3_X (halogen-free + AEC-Q101). While SMAJ13CA-E3/5A itself is not automotive-qualified, its design foundation and thermal/surge performance align with automotive requirements - making it suitable for prototyping and non-safety-critical modules pending qualification upgrade.
How does the clamping voltage of the SMAJ13CA-E3/5A compare to its standoff voltage?
The SMAJ13CA-E3/5A clamps to ≤21.5 V at its rated peak pulse current of 18.6 A, yielding a clamping ratio (VC/VWM) of approximately 1.65. This tightly controlled ratio ensures downstream components see minimal overvoltage stress - a critical advantage over generic suppressors with ratios >2.0. The low ratio is achieved via optimized silicon geometry and low incremental resistance, inherent to the SMAJ13CA-E3/5A design.
SMAJ13CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMAJ13CA-E3/5A FAQ
1.How can I place an order for SMAJ13CA-E3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13CA-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 SMAJ13CA-E3/5A reliable?
The price and inventory of SMAJ13CA-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 SMAJ13CA-E3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ13CA-E3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13CA-E3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13CA-E3/5A?
SMAJ13CA-E3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13CA-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 SMAJ13CA-E3/5A?
For technical support, including SMAJ13CA-E3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13CA-E3/5A requirements.
6.How does Aetrix verify that SMAJ13CA-E3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ13CA-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 SMAJ13CA-E3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ13CA-E3/5A?
All SMAJ13CA-E3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13CA-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 SMAJ13CA-E3/5A part is unused and in its original packaging.
Return procedure for SMAJ13CA-E3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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