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Vishay General Semiconductor - Diodes Division SMAJ13CAHE3/5A
- Part No.:
- SMAJ13CAHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13CAHE3/5A.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,416
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Product details
Overview
SMAJ13CAHE3/5A 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, 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 control systems.
For engineers reviewing the SMAJ13CAHE3/5A datasheet, SMAJ13CAHE3/5A pinout, SMAJ13CAHE3/5A application, or SMAJ13CAHE3/5A equivalent, this device serves as a robust, AEC-Q101-qualified transient suppressor for bidirectional DC line protection where low clamping voltage, fast response (<1 ps), and stable thermal performance up to +150 °C junction temperature are required.
Technical Context
This bidirectional TVS operates symmetrically in both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable leakage (<1 μA at VWM) and repeatable clamping behavior under repetitive surge conditions (0.01% duty cycle).
Designed for surface-mount assembly on standard PCB copper pads (0.2" × 0.2"), it delivers 400 W peak pulse power below 78 V and derates to 300 W above that threshold. Thermal resistance is 120 °C/W junction-to-ambient and 30 °C/W junction-to-lead, supporting reliable operation without heatsinking in typical industrial ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 13 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC operating margin. |
| VBR (Breakdown Voltage) | 14.4–15.9 V at 1 mA - Confirmed breakdown range ensuring predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 21.5 V at 18.6 A - Limits transient voltage seen by downstream circuitry; critical for protecting 15 V-rated ICs. |
| PPPM (Peak Pulse Power) | 400 W (10/1000 μs) - Sustains high-energy surges common in automotive load-dump or inductive switching scenarios. |
| IPPM (Peak Pulse Current) | 18.6 A - Peak current capability at rated clamping voltage; determines survivability against IEC 61000-4-5 Level 4 surges. |
| TJmax | +150 °C - Enables use in under-hood automotive environments and high-temperature industrial enclosures. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height for automated placement. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, MSL Level 1 compliant (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No functional polarity - either end connects to protected line; clamps voltage excursions in both directions. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring reliability under thermal cycling and vibration. |
| 400 W peak pulse power (10/1000 μs) | Withstands high-energy transients from inductive load switching (e.g., solenoid drivers, relay coils) without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on protected devices - e.g., keeps 15 V logic inputs within safe margin during surge. |
| Fast response time (<1 ps) | Activates before sensitive semiconductor junctions experience avalanche damage, enabling effective front-end protection. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, simplifying manufacturing logistics for high-volume SMT lines. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
|
Use Scenario: Protecting 12 V CAN bus signal lines and microcontroller GPIOs from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before it reaches MCU or transceiver. Use Value: Maintains system uptime by preventing latch-up or gate oxide rupture in 15 V-tolerant automotive MCUs during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding 24 V DC digital input channels from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Primary transient suppression device across input terminals, working in concert with series current-limiting resistors and optocouplers. Use Value: Enables >100,000 actuation cycles without degradation, meeting IEC 61000-4-4 Level 4 immunity requirements for industrial controllers. |
| Consumer Appliance Motor Drive Board | Telecom Remote Sensor Node |
|
Use Scenario: Clamping back-EMF spikes generated by brushed DC motors in washing machine control boards. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals and H-bridge power FETs to absorb inductive kickback. Use Value: Prevents false triggering of overvoltage protection circuits and extends lifetime of 30 V-rated MOSFETs under repeated commutation stress. |
Use Scenario: Protecting RS-485 communication lines in outdoor environmental sensors exposed to lightning-induced surges. IC Role / Device Role / Timing Role: First-stage protection device mounted at board edge, upstream of isolated transceiver ICs and ESD diodes. Use Value: Reduces failure rate in field-deployed nodes by limiting transient voltage to <22 V, well below the 25 V absolute maximum rating of isolated RS-485 drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13CA-M3/5A | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No difference in circuit design or layout; differs only in material composition and compliance reporting. | Select when halogen-free bill-of-materials (BOM) is mandated by OEM or regional environmental regulations. |
| SMBJ13CAHE3/5A | Same VWM, VBR, VC, but SMB (DO-214AA) package - 30% larger footprint and 50% higher PPPM (600 W). | Requires PCB pad revision; suitable where higher surge margin or legacy SMB layout exists. | Choose when system-level surge testing exceeds 400 W or existing designs use SMB footprint for mechanical robustness. |
Compared with SMAJ13CAHE3/5A, the M3 variant offers identical protection performance with halogen-free construction, while SMBJ13CAHE3/5A provides higher surge capacity in a larger package - enabling trade-offs between board space, compliance needs, and worst-case transient energy handling.
Availability
SMAJ13CAHE3/5A is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input protection, and consumer appliance motor drive circuits requiring stable component supply and long-term lifecycle support.
Supply support for SMAJ13CAHE3/5A 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, automotive qualification, and high-volume manufacturability.
The SMAJ series targets cost-sensitive, high-reliability transient suppression in automotive, industrial, and telecom infrastructure - delivering standardized TVS performance in compact surface-mount packages with AEC-Q101 validation.
FAQ
What is the clamping voltage of SMAJ13CAHE3/5A at its rated peak pulse current?
The SMAJ13CAHE3/5A has a maximum clamping voltage (VC) of 21.5 V at 18.6 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per JEDEC standards and ensures downstream components see no more than 21.5 V during surge events - critical for safeguarding 15 V or 24 V logic interfaces. The SMAJ13CAHE3/5A maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMAJ13CAHE3/5A suitable for automotive applications?
Yes, SMAJ13CAHE3/5A is AEC-Q101 qualified and specifically designed for automotive use, including body electronics, infotainment power rails, and sensor interface protection. Its bidirectional architecture, 150 °C maximum junction temperature, and robust surge handling (400 W, 10/1000 μs) meet ISO 7637-2 and ISO 16750-2 requirements. The HE3 suffix confirms RoHS compliance and automotive qualification - making SMAJ13CAHE3/5A appropriate for under-hood and cabin modules.
How does SMAJ13CAHE3/5A differ from unidirectional SMAJ13AHE3/5A?
SMAJ13CAHE3/5A is bidirectional with symmetrical clamping in both polarities and no cathode band marking, whereas SMAJ13AHE3/5A is unidirectional with a visible cathode band and conducts only in reverse bias. Electrically, SMAJ13CAHE3/5A has identical VWM (13 V), VBR (14.4–15.9 V), and VC (21.5 V) ratings but supports AC-coupled or floating-line protection. SMAJ13CAHE3/5A replaces SMAJ13AHE3/5A only when bidirectional surge suppression is required - such as on differential buses or ungrounded sensor outputs.
What is the thermal resistance of SMAJ13CAHE3/5A, and how does it affect PCB layout?
SMAJ13CAHE3/5A 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 0.2" × 0.2" copper pads per terminal. This means minimal copper area is needed for thermal management in most applications - no heatsink required for intermittent surge duty. However, for sustained power dissipation or high ambient temperatures (>85 °C), increasing pad size or adding thermal vias improves reliability. The SMAJ13CAHE3/5A's low RθJL also supports efficient heat transfer through solder joints into internal ground planes.
Does SMAJ13CAHE3/5A require derating above 25 °C ambient temperature?
Yes, SMAJ13CAHE3/5A must be derated above 25 °C ambient per Figure 2 in the Vishay datasheet (Document Number 88390). Its peak pulse power drops linearly from 400 W at 25 °C to ~240 W at 100 °C ambient. This derating applies to repetitive surge conditions (duty cycle ≤0.01%). For single-event transients, junction temperature rise is transient and governed by thermal impedance curves - but sustained operation near TJmax (+150 °C) requires careful thermal design. Always verify worst-case junction temperature using actual board layout and surge repetition rate when using SMAJ13CAHE3/5A.
SMAJ13CAHE3/5A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ13CAHE3/5A FAQ
1.How can I place an order for SMAJ13CAHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13CAHE3/5A 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 SMAJ13CAHE3/5A reliable?
The price and inventory of SMAJ13CAHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ13CAHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ13CAHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13CAHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13CAHE3/5A?
SMAJ13CAHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13CAHE3/5A 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 SMAJ13CAHE3/5A?
For technical support, including SMAJ13CAHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13CAHE3/5A requirements.
6.How does Aetrix verify that SMAJ13CAHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ13CAHE3/5A 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 SMAJ13CAHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ13CAHE3/5A?
All SMAJ13CAHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13CAHE3/5A, 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 SMAJ13CAHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ13CAHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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