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Vishay General Semiconductor - Diodes Division SMAJ13CAHE3_A/H
- Part No.:
- SMAJ13CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13CAHE3_A/H.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ13CAHE3_A/H 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 stand-off 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 (IPPM), and 400 W peak pulse power rating with 10/1000 μs waveform - used in automotive sensor protection and industrial I/O interface surge suppression.
For engineers reviewing the SMAJ13CAHE3_A/H datasheet, SMAJ13CAHE3_A/H pinout, SMAJ13CAHE3_A/H application, or SMAJ13CAHE3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 120 °C/W junction-to-ambient thermal resistance, low leakage (<1 μA at VWM), 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 construction, enabling protection of AC-coupled or differential signal lines without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the SMA package supports high surge current handling with minimal parasitic inductance.
The device is rated for repetitive 400 W pulses (10/1000 μs) up to 0.01 % duty cycle, derating linearly above 25 °C ambient per Fig. 2, and meets MSL Level 1 per J-STD-020 with 260 °C peak reflow profile. It is AEC-Q101 qualified for automotive underhood and body electronics applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - maximum continuous reverse operating voltage before significant leakage; defines safe working range for protected circuitry. |
| VBR min/max | 14.4 V / 15.9 V at 1 mA - guaranteed breakdown onset window; ensures predictable clamping initiation across temperature and unit variation. |
| VC @ IPPM | 21.5 V at 18.6 A - clamped voltage during full-rated transient; determines worst-case overvoltage seen by downstream ICs or MOSFETs. |
| PPPM | 400 W (10/1000 μs) - peak transient energy absorption capacity; sufficient for ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 surges. |
| ID @ VWM | <1 μA - ultra-low reverse leakage at stand-off voltage; prevents signal distortion or bias shift in high-impedance sensor interfaces. |
| TJ max | +150 °C - maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures. |
| RθJA | 120 °C/W - thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; informs board-level thermal design for sustained surge duty. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking; matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical PN junction; accepts surge current flow in either direction during overvoltage events. |
| Cathode | Transient current exit (bidirectional) | Second terminal of symmetrical PN junction; completes low-impedance path to ground or return rail during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge endurance - required for engine control, ADAS sensor, and infotainment ECU protection. |
| 400 W peak pulse power | Handles high-energy transients such as load dump (ISO 7637-2 Pulse 5a) and inductive switching spikes without degradation when mounted on recommended 5 mm × 5 mm copper pads. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on protected devices - e.g., 21.5 V clamping at 13 V nominal line ensures robust margin for 12 V automotive systems. |
| MSL Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with high-volume manufacturing using 260 °C peak profile per J-STD-020. |
| Glass passivated junction | Provides stable VBR tolerance and long-term parameter stability under thermal cycling and humidity exposure - critical for 15-year automotive service life. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from ESD and load-dump-induced transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pair or supply rail to shunt surge energy before it reaches sensitive front-end amplifiers or communication ICs. Use Value: Maintains signal integrity during ISO 10605 ESD events (±15 kV air, ±8 kV contact) and suppresses >100 V transients to ≤21.5 V, preventing latch-up or permanent damage. |
Use Scenario: Safeguarding 24 V DC digital input modules in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between input line and common rail to limit transient overvoltage during inductive load switching (IEC 61000-4-4, Level 4). Use Value: Clamps 400 V transients to 21.5 V within <1 ns, ensuring PLC input circuitry remains functional and compliant with EN 61000-6-2 immunity requirements. |
| Consumer Power Adapter Output | Telecom Line Interface Protection |
|
Use Scenario: Secondary-side overvoltage suppression on 5–19 V USB-C PD adapter outputs exposed to accidental short-circuit recovery spikes or capacitor discharge events. IC Role / Device Role / Timing Role: Fast-acting bidirectional clamp across output terminals to prevent overshoot from damaging connected devices during dynamic load changes. Use Value: Limits output voltage excursion to ≤21.5 V during 10/1000 μs surges up to 18.6 A, meeting UL 62368-1 transient safety margins for end-user equipment. |
Use Scenario: Protecting Ethernet PHY or RS-485 transceivers on telecom base station backplane interfaces from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary-stage TVS on differential data lines (e.g., TX+/TX−) to absorb common-mode transients before they couple into receiver circuitry. Use Value: Withstands 400 W surges while maintaining sub-1 μA leakage at 13 V, preserving signal-to-noise ratio and ensuring compliance with ITU-T K.21 basic protection level. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13CA-E3/61 | Same electrical specs and SMA package, but commercial-grade (non-AEC-Q101); RoHS-compliant, MSL Level 1, 260 °C reflow. | Lacks automotive qualification; suitable for industrial, consumer, and telecom where AEC-Q101 is not mandated. | Select SMAJ13CAHE3_A/H when automotive qualification, extended temperature validation, or long-term reliability traceability is required. |
| SMBJ13CAHE3_A/H | Same AEC-Q101 qualification and bidirectional function, but SMB (DO-214AA) package - larger footprint (4.58 mm × 3.94 mm vs. 4.50 mm × 2.79 mm) and higher 600 W PPPM rating. | Better suited for higher-energy transients or designs requiring margin beyond 400 W; requires PCB layout change. | Choose SMBJ13CAHE3_A/H only if system-level surge testing exceeds SMAJ13CAHE3_A/H's 400 W rating or thermal budget allows larger package. |
Compared with SMAJ13CA-E3/61, SMAJ13CAHE3_A/H adds AEC-Q101 qualification and automotive traceability without electrical trade-offs; versus SMBJ13CAHE3_A/H, it offers identical protection performance in a smaller SMA footprint but with lower peak power headroom - ideal for space-constrained automotive modules.
Availability
SMAJ13CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply, AEC-Q101 compliance, and consistent surge performance across production batches.
Supply support for SMAJ13CAHE3_A/H 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, precision, and application-specific optimization.
The SMAJ series is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and communications systems where failure modes must be mitigated without compromising signal fidelity or board space.
FAQ
What is the clamping voltage of SMAJ13CAHE3_A/H at its rated peak pulse current?
The SMAJ13CAHE3_A/H has a maximum clamping voltage (VC) of 21.5 V at its rated peak pulse current (IPPM) of 18.6 A, measured with a 10/1000 μs waveform. This value defines the upper voltage limit imposed on protected circuitry during a full-rated transient event, and is confirmed in the Vishay datasheet Document Number 88390, Table on page 2. The SMAJ13CAHE3_A/H maintains this clamping performance across its operating temperature range and after repeated surge exposures when properly mounted.
Is SMAJ13CAHE3_A/H suitable for automotive applications?
Yes, SMAJ13CAHE3_A/H is AEC-Q101 qualified and specifically intended for automotive use, including engine control units, ADAS sensors, body electronics, and infotainment systems. The "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified construction, and the device undergoes rigorous stress testing per the AEC standard. Its 150 °C maximum junction temperature and validated performance under temperature cycling, HTRB, and surge endurance make SMAJ13CAHE3_A/H appropriate for under-hood and cabin-mounted automotive modules.
What is the standoff voltage (VWM) and why does it matter for SMAJ13CAHE3_A/H?
The standoff voltage (VWM) of SMAJ13CAHE3_A/H is 13 V - the maximum DC or continuous peak voltage the device can withstand without entering conduction. This parameter ensures the SMAJ13CAHE3_A/H remains non-conductive during normal operation, minimizing leakage current (<1 μA) and avoiding interference with signal integrity or power rail regulation. Selecting a VWM slightly above the system's maximum operating voltage (e.g., 13 V for a 12 V nominal automotive rail) provides optimal margin between normal operation and transient clamping activation.
How does the SMA (DO-214AC) package of SMAJ13CAHE3_A/H impact PCB layout?
The SMA (DO-214AC) package of SMAJ13CAHE3_A/H measures 4.50 mm × 2.79 mm with a 2.54 mm lead pitch, requiring a compact 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal for optimal thermal and surge performance. Its low-profile design supports high-density layouts and automated placement, while the absence of polarity marking simplifies orientation during assembly. Because SMAJ13CAHE3_A/H is bidirectional, PCB silkscreen need not indicate anode/cathode - reducing layout complexity versus unidirectional TVS devices.
What is the peak pulse power rating of SMAJ13CAHE3_A/H and how is it tested?
The SMAJ13CAHE3_A/H is rated for 400 W peak pulse power with a 10/1000 μs double-exponential waveform, per ANSI/IEEE C62.35 and tested under conditions defined in Figure 1 and Figure 3 of the Vishay datasheet. This rating applies at TA = 25 °C and derates linearly above that temperature, reaching 300 W at 78 V and above. The 400 W rating reflects the device's ability to absorb transient energy without failure when mounted on the specified 5.0 mm × 5.0 mm copper pads - a condition directly tied to real-world surge immunity in automotive and industrial applications.
SMAJ13CAHE3_A/H 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:
- -
- 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_A/H FAQ
1.How can I place an order for SMAJ13CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13CAHE3_A/H 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_A/H reliable?
The price and inventory of SMAJ13CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ13CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMAJ13CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13CAHE3_A/H?
SMAJ13CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13CAHE3_A/H 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_A/H?
For technical support, including SMAJ13CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13CAHE3_A/H requirements.
6.How does Aetrix verify that SMAJ13CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMAJ13CAHE3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of SMAJ13CAHE3_A/H?
All SMAJ13CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13CAHE3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for SMAJ13CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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