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Vishay General Semiconductor - Diodes Division SMAJ15CAHE3/61
- Part No.:
- SMAJ15CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ15CAHE3/61.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,169
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Product details
Overview
SMAJ15CAHE3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on signal/power lines. It features a 15 V stand-off voltage (VWM), 24.4 V maximum clamping voltage (VC) at 16.4 A peak pulse current (IPPM), and 400 W peak pulse power (PPPM) with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor signal lines in automotive and industrial electronics.
For engineers reviewing the SMAJ15CAHE3/61 datasheet, SMAJ15CAHE3/61 pinout, SMAJ15CAHE3/61 application, or SMAJ15CAHE3/61 equivalent, key selection criteria include bidirectional surge clamping capability, AEC-Q101 qualification, RoHS-compliant matte tin plating, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its CA suffix, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM), while the low incremental surge resistance supports consistent clamping under repetitive transients.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 120 °C/W and RθJL = 30 °C/W - indicating effective heat transfer to PCB leads but requiring thermal pad design per Vishay's recommended 0.2" × 0.2" copper area per terminal for full 400 W rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 12 V nominal systems. |
| VBR min/max | 16.7 V / 18.5 V at 1.0 mA - verified breakdown threshold range ensuring reliable turn-on during overvoltage events. |
| VC @ IPPM | 24.4 V at 16.4 A - clamping voltage under standardized 10/1000 μs surge; limits downstream voltage stress to protected ICs. |
| PPPM | 400 W - peak pulse power handling with 10/1000 μs waveform; derates to 300 W above 78 V, but fully applicable here. |
| ID @ VWM | ≤1.0 μA - ultra-low reverse leakage at stand-off voltage, minimizing standby power loss and signal distortion. |
| TJ max | +150 °C - maximum junction temperature supporting operation in under-hood automotive environments. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22 standards. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. No polarity marking on bidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | One terminal of symmetrical PN junction; accepts surge current from either direction during clamping. |
| Cathode | Transient current exit (bidirectional) | Second terminal of symmetrical PN junction; completes low-impedance path to ground or return rail during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC, differential, or floating signal lines without external polarity management. |
| 400 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) when mounted on specified 0.2" × 0.2" copper pads. |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60 % RH; compatible with standard reflow profiles up to 260 °C peak. |
| Glass passivated junction | Ensures stable VBR over time and temperature, low leakage, and high reliability in humid or thermally cycled environments. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal line and ground, responding within <1 ps to limit transient excursions. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V microcontrollers and analog front-ends by holding voltage ≤24.4 V during 16.4 A surges. |
Use Scenario: Safeguarding digital input/output channels of programmable logic controllers against field-wiring induced surges in factory automation systems. IC Role / Device Role / Timing Role: Standoff-clamp TVS connected between I/O pin and common rail, absorbing energy from relay coil flyback or ESD events. Use Value: Maintains functional integrity of 24 V DC I/O circuits by limiting clamped voltage to 24.4 V while dissipating up to 400 W peak power. |
| Consumer Power Adapter Protection | Telecom Line Interface Protection |
|
Use Scenario: Shielding secondary-side DC outputs of AC/DC adapters and USB PD chargers from output short-circuit transients and capacitor discharge spikes. IC Role / Device Role / Timing Role: Secondary-side TVS placed between VOUT and GND, activated only during overvoltage fault conditions. Use Value: Enables compliance with UL 62368-1 transient immunity requirements using a single 15 V standoff device with 24.4 V clamping ceiling. |
Use Scenario: Protecting Ethernet PHY interfaces and analog telephone line drivers from lightning-induced surges and AC power cross-talk in VoIP gateways. IC Role / Device Role / Timing Role: Bidirectional suppressor bridging differential pair (e.g., TIP/RING) to limit common-mode overvoltage. Use Value: Provides symmetrical clamping to preserve signal integrity on balanced lines while meeting ITU-T K.21 basic protection level. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15CA-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No difference in circuit function or layout; differs only in material composition for specific environmental compliance programs. | Select when halogen-free bill-of-materials is mandated by OEM or regional regulation (e.g., JEITA EG-8). |
| SMAJ15CAHE3/5A | Same die and qualification; differs only in packaging - 7500-unit 13" tape-and-reel vs. 1800-unit 7" reel. | No electrical or mechanical impact; choice driven solely by production volume and SMT feeder compatibility. | Choose /5A for high-volume automated assembly where larger reels reduce changeover frequency. |
Compared with SMAJ15CAHE3/61, the /M3/61 variant satisfies halogen-free requirements without performance trade-offs, while the /HE3/5A offers identical functionality in higher-density packaging - enabling optimization for compliance or manufacturing efficiency without redesign.
Availability
SMAJ15CAHE3/61 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O protection, and telecom line interface hardening requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for SMAJ15CAHE3/61 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, power efficiency, and automotive-grade qualification.
The SMAJ series delivers standardized transient suppression in compact surface-mount packages, engineered specifically for robustness in harsh environments - including under-hood automotive, factory automation, and infrastructure equipment.
FAQ
What is the clamping voltage of SMAJ15CAHE3/61 at its rated peak pulse current?
The SMAJ15CAHE3/61 has a maximum clamping voltage (VC) of 24.4 V at 16.4 A peak pulse current (IPPM), measured with a 10/1000 μs waveform. This value is guaranteed per Vishay's datasheet (Document Number: 88390, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ15CAHE3/61 maintains this clamping performance across its qualified temperature range (-55 °C to +150 °C).
Is SMAJ15CAHE3/61 suitable for automotive applications?
Yes, SMAJ15CAHE3/61 is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix, indicating RoHS-compliant and AEC-Q101-qualified construction. It meets requirements for engine control modules, body electronics, and ADAS sensor interfaces where transient immunity and long-term reliability are critical. The SMAJ15CAHE3/61 undergoes stress testing including temperature cycling, HTRB, and ESD per JESD22 standards.
What does the "CA" suffix mean in SMAJ15CAHE3/61?
The "CA" suffix in SMAJ15CAHE3/61 denotes a bidirectional configuration - meaning the device functions identically in both polarities, with matched breakdown and clamping characteristics in forward and reverse directions. This enables single-device protection of AC-coupled signals, differential buses (e.g., CAN, RS-485), or floating nodes without polarity constraints. The SMAJ15CAHE3/61 has no cathode band marking, consistent with bidirectional construction.
What is the maximum operating temperature for SMAJ15CAHE3/61?
The SMAJ15CAHE3/61 has a maximum junction temperature (TJ max) of +150 °C and an operating junction/storage temperature range of -55 °C to +150 °C. This rating supports deployment in under-hood automotive environments and industrial enclosures with elevated ambient temperatures. Derating curves in the datasheet confirm sustained 400 W pulse capability down to TJ = 25 °C, with linear reduction above that point.
How is SMAJ15CAHE3/61 packaged and delivered?
SMAJ15CAHE3/61 is supplied in 7-inch diameter plastic tape-and-reel packaging (package code "61"), with 1800 units per reel. The device uses matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards, and meets MSL Level 1 per J-STD-020 - allowing unlimited floor life and compatibility with standard lead-free reflow profiles peaking at 260 °C. The SMAJ15CAHE3/61 is also available in 13-inch reels (code "5A") for high-volume SMT lines.
SMAJ15CAHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 16.4A
- 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)
SMAJ15CAHE3/61 FAQ
1.How can I place an order for SMAJ15CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ15CAHE3/61 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 SMAJ15CAHE3/61 reliable?
The price and inventory of SMAJ15CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ15CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ15CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ15CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ15CAHE3/61?
SMAJ15CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ15CAHE3/61 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 SMAJ15CAHE3/61?
For technical support, including SMAJ15CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ15CAHE3/61 requirements.
6.How does Aetrix verify that SMAJ15CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ15CAHE3/61 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 SMAJ15CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ15CAHE3/61?
All SMAJ15CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ15CAHE3/61, 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 SMAJ15CAHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ15CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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