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Vishay General Semiconductor - Diodes Division SMAJ13CAHM3_A/I
- Part No.:
- SMAJ13CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13CAHM3_A/I.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,124
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Product details
Overview
SMAJ13CAHM3_A/I from Vishay General Semiconductor is a bidirectional 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 SMAJ13CAHM3_A/I datasheet, SMAJ13CAHM3_A/I pinout, SMAJ13CAHM3_A/I application, or SMAJ13CAHM3_A/I equivalent, this device serves as a halogen-free, AEC-Q101-qualified TVS for bidirectional surge protection where low-profile surface-mount placement, fast response time (<1 ns), and stable clamping under repetitive transients are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM), while the SMA package supports automated placement and meets MSL level 1 (260 °C reflow peak).
The device delivers 400 W peak pulse power up to 78 V, derating to 300 W above that threshold. Its thermal resistance (RθJA = 120 °C/W) and junction temperature range (–55 to +150 °C) support reliable operation in harsh environments without active cooling.
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 - Confirmed breakdown threshold ensuring predictable clamping onset |
| VC @ IPPM | 21.5 V at 18.6 A - Clamped voltage during 10/1000 μs surge, limiting downstream stress |
| PPPM | 400 W - Peak surge power handling capability with standard lightning/surge waveform |
| IFSM | 40 A - Single half-sine surge current rating (8.3 ms), relevant for unidirectional variants only; not applicable here due to bidirectional symmetry |
| TJ max. | +150 °C - Maximum junction temperature enabling use in under-hood automotive and industrial enclosures |
| Package | SMA (DO-214AC) - Low-profile SMD outline with 5.0 mm × 5.0 mm copper pad thermal design requirement |
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 | Transient current entry (either polarity) | One of two identical terminals; conducts surge current toward internal junction during either positive or negative overvoltage event |
| Cathode | Transient current entry (either polarity) | Second identical terminal; completes symmetrical conduction path - no functional distinction from Anode in bidirectional mode |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global industrial and automotive production |
| MSL Level 1 | Supports standard PCB reflow profiles up to 260 °C peak without preconditioning |
| 400 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) when properly mounted |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ESD events in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential or single-ended signal lines upstream of interface ICs. Use Value: Limits transient voltage to ≤21.5 V during 18.6 A surges, preventing latch-up or gate oxide damage in protected ICs. | Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers against field-wiring induced surges and relay coil flyback. IC Role / Device Role / Timing Role: Parallel-connected TVS across input terminals to shunt energy before it reaches optocoupler or Schmitt trigger input stages. Use Value: Maintains system uptime by absorbing 400 W surges without degradation, supporting >100,000 surge cycles per MIL-STD-883H Method 3015.7. |
| Consumer Appliance Motor Drive Protection | Telecom Power Supply Input Protection |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Mounted across motor terminals or H-bridge outputs to clamp inductive kickback before reaching driver ICs. Use Value: Withstands repetitive 10/1000 μs transients at 0.01% duty cycle, enabling robust operation in high-cycle consumer appliances. | Use Scenario: Guarding primary-side DC input of telecom power supplies against lightning-induced surges on -48 V distribution rails. IC Role / Device Role / Timing Role: First-line transient suppressor placed before bulk capacitor and controller IC to limit voltage overshoot. Use Value: Clamps to 21.5 V at 18.6 A, allowing downstream overvoltage protection circuits to remain inactive during minor transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13CAHE3_A/I | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification | Preferred for commercial-grade automotive modules where halogen content is unrestricted | Select when halogen-free material is not mandated by end-customer specification |
| SMBJ13CAHM3_A/I | Same VWM/VC ratings but in SMB (DO-214AA) package - 27% larger footprint and higher RθJA (100 °C/W) | Better thermal performance under sustained surge conditions; requires larger PCB area | Choose when higher surge repetition rate or improved thermal margin justifies added board space |
Compared with SMAJ13CAHM3_A/I, SMAJ13CAHE3_A/I offers identical protection performance without halogen-free compliance, while SMBJ13CAHM3_A/I trades compactness for enhanced thermal dissipation and surge endurance - selection depends on PCB area constraints, environmental regulations, and thermal duty cycle.
Availability
SMAJ13CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial PLC I/O hardening, and telecom power supply input conditioning requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMAJ13CAHM3_A/I 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 and application-specific validation.
The SMAJ series is engineered for high-reliability transient suppression in automotive, industrial, and telecom infrastructure - optimized for AEC-Q101 compliance, automated assembly, and consistent clamping under real-world surge waveforms.
FAQ
What is the clamping voltage of SMAJ13CAHM3_A/I at its rated peak pulse current?
The SMAJ13CAHM3_A/I has a maximum clamping voltage (VC) of 21.5 V at its rated peak pulse current (IPPM) of 18.6 A, measured using the standardized 10/1000 μs double-exponential surge waveform. This value ensures protected circuitry remains below critical voltage thresholds during transient events, and is confirmed in the Vishay datasheet revision 09-Jan-2024, page 2.
Is SMAJ13CAHM3_A/I suitable for automotive applications?
Yes, SMAJ13CAHM3_A/I is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix HM3_X. It meets stringent reliability requirements for engine control, body electronics, and ADAS sensor interfaces, and is halogen-free and RoHS-compliant - making it suitable for modern automotive production programs requiring full material compliance.
How does the bidirectional configuration of SMAJ13CAHM3_A/I affect its circuit implementation?
The bidirectional configuration of SMAJ13CAHM3_A/I means it functions identically for positive and negative transients, eliminating polarity sensitivity during layout. Unlike unidirectional TVS diodes, SMAJ13CAHM3_A/I has no cathode band marking and can be placed across AC-coupled lines, transformer secondaries, or floating buses without orientation checks - simplifying design and reducing assembly errors.
What is the thermal resistance of SMAJ13CAHM3_A/I, and how does it impact PCB layout?
SMAJ13CAHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repetitive surges, designers must adhere to this pad layout - reducing pad size increases thermal impedance and risks exceeding the +150 °C TJ max rating.
Does SMAJ13CAHM3_A/I meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes, SMAJ13CAHM3_A/I meets MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. This allows direct placement onto PCBs without baking or dry-packaging, supporting standard lead-free assembly processes used in high-volume automotive and industrial manufacturing.
SMAJ13CAHM3_A/I 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ13CAHM3_A/I FAQ
1.How can I place an order for SMAJ13CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13CAHM3_A/I 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 SMAJ13CAHM3_A/I reliable?
The price and inventory of SMAJ13CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ13CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ13CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13CAHM3_A/I?
SMAJ13CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13CAHM3_A/I 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 SMAJ13CAHM3_A/I?
For technical support, including SMAJ13CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13CAHM3_A/I requirements.
6.How does Aetrix verify that SMAJ13CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ13CAHM3_A/I 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 SMAJ13CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ13CAHM3_A/I?
All SMAJ13CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13CAHM3_A/I, 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 SMAJ13CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMAJ13CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ13CAHM3_A/I Tags
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