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Vishay General Semiconductor - Diodes Division SMAJ13CA-M3/61
- Part No.:
- SMAJ13CA-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13CA-M3/61.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ13CA-M3/61 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 and 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 SMAJ13CA-M3/61 datasheet, SMAJ13CA-M3/61 pinout, SMAJ13CA-M3/61 application, or SMAJ13CA-M3/61 equivalent, key selection criteria include bidirectional clamping capability, 13 V stand-off rating, 21.5 V clamping under 18.6 A surge, RoHS-compliant halogen-free construction (M3 suffix), and AEC-Q101 qualification eligibility via HM3 variant.
Technical Context
This device operates as a voltage-clamping protector with symmetrical reverse/forward conduction behavior due to its bidirectional architecture. It responds to transient overvoltages within picoseconds and maintains low incremental surge resistance to limit let-through energy during ESD or inductive switching events.
Designed for surface-mount assembly on PCBs with 0.2" × 0.2" copper pads per terminal, it delivers 400 W peak pulse power up to 78 V and derates to 300 W above that threshold. Its junction-to-ambient thermal resistance is 120 °C/W, enabling reliable operation up to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected line. |
| VBR (min/max) | 14.4 V / 15.9 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 21.5 V at 18.6 A - Clamped voltage under full 10/1000 μs surge; determines maximum stress imposed on downstream circuitry. |
| PPPM | 400 W - Peak pulse power handling (≤78 V); supports robust protection against common automotive load-dump and inductive kick transients. |
| IPPM | 18.6 A - Peak pulse current capacity at rated clamping voltage; defines surge current survivability without degradation. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive and high-temperature industrial environments. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 2.54 mm lead pitch; compatible with automated pick-and-place and reflow processes. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (JEDEC J-STD-020), 260 °C peak reflow profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; cathode-defined polarity absent in bidirectional configuration | No marking on device body; terminals are electrically symmetrical - either end may connect to line or ground depending on layout. |
| Cathode | Current exit point in forward bias; functionally identical to Anode in bidirectional mode | Not marked; bidirectional operation means both terminals behave identically during transient suppression in either direction. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity constraints. |
| 400 W peak pulse power (≤78 V) | Handles high-energy transients such as ISO 7637-2 Pulse 5a (load dump) in 12 V automotive systems. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for global electronics manufacturing and end-of-life disposal. |
| Low clamping ratio (VC/VBR ≈ 1.36) | Minimizes let-through overvoltage relative to breakdown, improving margin for sensitive 3.3 V or 5 V logic interfaces. |
| AEC-Q101 qualification path | Available in HM3 variant (e.g., SMAJ13CAHM3_X); supports automotive-grade reliability validation for engine control and ADAS subsystems. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply rails in body control modules from load-dump transients up to 35 V and 400 ms duration. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed between battery rail and DC-DC input stage to shunt surge energy before it reaches regulator ICs. Use Value: Limits peak voltage to ≤21.5 V during 18.6 A surges, preventing latch-up or permanent damage to downstream PMICs and microcontrollers. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) in factory-floor pressure sensors from ESD and relay-switching noise. IC Role / Device Role / Timing Role: Bidirectional transient suppressor mounted directly at connector interface to absorb ±8 kV contact ESD per IEC 61000-4-2. Use Value: Maintains signal integrity by clamping transients below 21.5 V while adding <1 pF junction capacitance - negligible effect on loop bandwidth. |
| Consumer USB Port Surge Protection | Telecom Ethernet PHY Protection |
|
Use Scenario: Safeguarding USB 2.0 D+/D− lines in portable docking stations exposed to hot-plug induced transients and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed adjacent to USB transceiver IC to clamp differential and common-mode surges. Use Value: Provides 21.5 V clamping with sub-nanosecond response, preserving signal rise/fall times and meeting USB 2.0 eye diagram compliance. |
Use Scenario: Protecting RJ45 magnetics secondary side in PoE-powered network switches from lightning-induced surges on data pairs. IC Role / Device Role / Timing Role: Bidirectional TVS installed across transformer center taps to divert common-mode transients before reaching PHY IC inputs. Use Value: Withstands 400 W pulses and operates up to +150 °C ambient, ensuring reliability in sealed, fanless telecom enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13A-M3/61 | Unidirectional version; same VWM, VBR, VC, and PPPM, but only conducts in one polarity. | Requires correct orientation during placement; unsuitable for AC or floating lines where polarity is undefined. | Select when protecting DC rails with known polarity and space-constrained layouts favoring unidirectional devices. |
| SMBJ13CA-M3/61 | Same electrical specs but in larger SMB (DO-214AA) package; 600 W PPPM rating (10/1000 μs), RθJA = 80 °C/W. | Higher power handling and better thermal performance, but occupies ~50% more board area than SMA package. | Choose when system-level surge testing exceeds 400 W or sustained ambient temperatures exceed 105 °C. |
Compared with SMAJ13A-M3/61, SMAJ13CA-M3/61 offers polarity-agnostic protection ideal for differential or floating nodes; compared with SMBJ13CA-M3/61, it trades lower surge capacity for compact footprint - critical in dense automotive ECUs and portable electronics.
Availability
SMAJ13CA-M3/61 is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface hardening, consumer USB port surge suppression, and telecom Ethernet PHY protection requiring stable component supply and halogen-free compliance.
Supply support for SMAJ13CA-M3/61 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 targets cost-sensitive yet robust transient suppression needs in automotive, industrial, and communications infrastructure - delivering standardized TVS performance in compact, automated-assembly-ready packages.
FAQ
What is the clamping voltage of SMAJ13CA-M3/61 under maximum surge conditions?
The SMAJ13CA-M3/61 exhibits a maximum clamping voltage (VC) of 21.5 V when subjected to its rated peak pulse current of 18.6 A using the standard 10/1000 μs waveform. This value is measured per JEDEC test conditions and represents the upper bound of voltage let-through during transient suppression - critical for verifying compatibility with downstream IC absolute maximum ratings. The SMAJ13CA-M3/61 maintains this clamping performance across its full operating temperature range.
Is SMAJ13CA-M3/61 suitable for automotive applications?
Yes, SMAJ13CA-M3/61 is qualified for automotive use through its halogen-free, RoHS-compliant M3 construction and direct path to AEC-Q101 qualification via the HM3 variant (e.g., SMAJ13CAHM3_A). It meets key requirements including 150 °C junction temperature rating, MSL Level 1 moisture sensitivity, and robust surge immunity - making it appropriate for body electronics, infotainment power rails, and sensor front-ends. The SMAJ13CA-M3/61 itself is commercial-grade but shares identical electrical and mechanical specs with the AEC-Q101 version.
How does the bidirectional design of SMAJ13CA-M3/61 affect PCB layout?
The bidirectional nature of SMAJ13CA-M3/61 eliminates polarity constraints during placement - no cathode band marking is present, and either terminal may connect to line or ground. This simplifies layout for AC-coupled signals, differential buses (e.g., RS-485, CAN), or floating sensor outputs where voltage polarity reversal is possible. Unlike unidirectional variants such as SMAJ13A-M3/61, the SMAJ13CA-M3/61 requires no orientation verification during automated assembly, reducing placement error risk and inspection overhead.
What is the thermal resistance of SMAJ13CA-M3/61, and how does it impact power dissipation?
The SMAJ13CA-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads. At its rated 3.3 W steady-state power dissipation (PD), this yields a ~400 °C junction-to-ambient delta - confirming that PD is strictly limited by package geometry, not silicon. In practice, the device relies on short-duration transient absorption rather than continuous power handling; its 400 W peak rating applies only to non-repetitive pulses with ≤0.01% duty cycle. The SMAJ13CA-M3/61 is not intended for DC power regulation.
Does SMAJ13CA-M3/61 meet international ESD and surge immunity standards?
The SMAJ13CA-M3/61 is engineered to support compliance with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive transients) when applied per Vishay's recommended layout guidelines - including short trace lengths, dedicated ground planes, and proper pad sizing. While the device itself is not certified to these standards, its 21.5 V clamping voltage, 18.6 A surge current rating, and sub-nanosecond response enable system-level pass rates. Designers must validate final implementation per standard test waveforms; the SMAJ13CA-M3/61 provides the foundational protection element.
SMAJ13CA-M3/61 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-M3/61 FAQ
1.How can I place an order for SMAJ13CA-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13CA-M3/61 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-M3/61 reliable?
The price and inventory of SMAJ13CA-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ13CA-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ13CA-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13CA-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13CA-M3/61?
SMAJ13CA-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13CA-M3/61 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-M3/61?
For technical support, including SMAJ13CA-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13CA-M3/61 requirements.
6.How does Aetrix verify that SMAJ13CA-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ13CA-M3/61 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-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ13CA-M3/61?
All SMAJ13CA-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13CA-M3/61, 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-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ13CA-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ13CA-M3/61 Tags
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