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Vishay General Semiconductor - Diodes Division SMAJ15CAHE3_A/I
- Part No.:
- SMAJ15CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ15CAHE3_A/I.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,275
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Product details
Overview
SMAJ15CAHE3_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 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 (10/1000 μs waveform), making it suitable for protecting MOSFETs, ICs, and sensor signal lines in automotive and industrial control systems.
For engineers reviewing the SMAJ15CAHE3_A/I datasheet, SMAJ15CAHE3_A/I pinout, SMAJ15CAHE3_A/I application, or SMAJ15CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low incremental surge resistance, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical breakdown behavior in both directions due to its bidirectional construction. Its glass-passivated junction ensures stable avalanche characteristics, while the SMA package supports surface-mount reflow soldering per J-STD-002 and JESD 22-B102 standards.
The SMAJ15CAHE3_A/I delivers 400 W peak pulse power up to 78 V and derates to 300 W above that threshold. It meets MSL Level 1 per J-STD-020 with a maximum lead finish temperature of 260 °C, and its thermal resistance (RθJA = 120 °C/W) reflects standard PCB pad layout performance without heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin. |
| VBR (min/max) | 16.7 V / 18.5 V - Breakdown voltage range at 1 mA test current; ensures reliable turn-on within specified tolerance. |
| VC @ IPPM | 24.4 V at 16.4 A - Clamped voltage during 10/1000 μs surge; determines maximum stress imposed on protected circuitry. |
| PPPM | 400 W - Peak pulse power handling (10/1000 μs); enables suppression of high-energy transients like load dump or ESD. |
| ID @ VWM | 1.0 μA - Reverse leakage at stand-off voltage; ensures minimal quiescent power loss and signal integrity. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial environments. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 2.54 mm lead pitch; compatible with automated pick-and-place. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; polarity-unmarked for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | One side of symmetrical avalanche junction; interchangeable with cathode in bidirectional operation. |
| Cathode | Current exit terminal in forward bias | Other side of symmetrical avalanche junction; no band marking distinguishes terminals for SMAJ15CAHE3_A/I. |
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) | Handles high-energy transients such as ISO 7637-2 Pulse 1/2a/5a without degradation when mounted on recommended 5.0 mm × 5.0 mm copper pads. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage exposure to downstream components-critical for 3.3 V or 5 V logic interfaces and analog sensor front-ends. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free reflow assembly without moisture sensitivity concerns or baking requirements. |
| Glass passivated chip junction | Ensures stable, repeatable avalanche characteristics over lifetime and across temperature extremes (−55 °C to +150 °C). |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply rails in automotive ECUs against load dump and alternator ripple. IC Role / Device Role / Timing Role: Voltage clamping element placed between power rail and ground to shunt surge energy away from regulators and microcontrollers. Use Value: Limits transient voltage to ≤24.4 V during 10/1000 μs surges up to 16.4 A, preserving downstream 3.3 V/5 V logic integrity. |
Use Scenario: Shielding analog output lines of pressure or temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional transient suppressor on differential or single-ended signal paths exposed to EMI and switching noise. Use Value: Sub-μA leakage at 15 V stand-off maintains sensor accuracy; fast response time prevents latch-up in precision ADC inputs. |
| Consumer Device USB Port Protection | Telecom Equipment DC Input Stage |
|
Use Scenario: Safeguarding USB 2.0 data lines and VBUS against ESD and cable-induced transients in portable devices. IC Role / Device Role / Timing Role: Low-capacitance TVS placed inline with D+/D− and VBUS to clamp ±8 kV contact ESD per IEC 61000-4-2. Use Value: 24.4 V clamping prevents damage to USB transceivers while maintaining signal rise/fall times due to minimal parasitic capacitance. |
Use Scenario: Guarding −48 V DC input stages in telecom base station power modules against lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional clamping device installed across input terminals to divert induced common-mode transients. Use Value: 400 W rating sustains multiple 10/1000 μs surges; AEC-Q101 qualification supports extended field life in harsh outdoor environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ15CA-M3 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated by OEM specifications. | Choose SMAJ15CA-M3 when environmental compliance requires halogen-free construction without altering circuit design. |
| SMAJ15AHE3_A/I | Unidirectional version with cathode band marking; same VWM (15 V), VC (24.4 V), and PPPM (400 W). | Requires polarity-aware PCB layout; unsuitable for AC-coupled or floating signal lines where bidirectional clamping is essential. | Select SMAJ15AHE3_A/I only for DC-biased unidirectional rails where reverse conduction must be blocked. |
Compared with SMAJ15CA-M3 and SMAJ15AHE3_A/I, the SMAJ15CAHE3_A/I offers identical surge robustness and automotive qualification but uniquely supports polarity-agnostic placement on bidirectional signal paths-reducing layout complexity and eliminating orientation errors in high-volume SMT assembly.
Availability
SMAJ15CAHE3_A/I is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, consumer USB protection, and telecom DC input stages requiring stable component supply and long-term lifecycle support.
Supply support for SMAJ15CAHE3_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, efficiency, and application-specific optimization.
The SMAJ series was developed for robust transient suppression in automotive, industrial, and telecom systems-delivering high pulse power density in compact surface-mount packages with AEC-Q101 validation.
FAQ
What is the clamping voltage of SMAJ15CAHE3_A/I at its rated peak pulse current?
The SMAJ15CAHE3_A/I has a maximum clamping voltage (VC) of 24.4 V at its rated peak pulse current (IPPM) of 16.4 A under a 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees predictable overvoltage limiting for protected circuits. The SMAJ15CAHE3_A/I maintains this clamping performance across its full operating temperature range of −55 °C to +150 °C.
Is SMAJ15CAHE3_A/I qualified for automotive applications?
Yes, SMAJ15CAHE3_A/I is AEC-Q101 qualified, meaning it has passed stress tests for temperature cycling, humidity, mechanical shock, and high-temperature operating life required for automotive electronics. This qualification applies specifically to the HE3 suffix variant and confirms suitability for under-hood and chassis-mounted modules where reliability under thermal and vibration stress is critical. The SMAJ15CAHE3_A/I meets these requirements without derating.
How does the bidirectional nature of SMAJ15CAHE3_A/I affect its PCB layout?
The SMAJ15CAHE3_A/I has no polarity marking-its bidirectional structure allows placement between any two nodes without regard to anode/cathode orientation. This eliminates orientation errors during automated assembly and simplifies layout for AC-coupled or floating signal lines. Unlike unidirectional variants such as SMAJ15AHE3_A/I, the SMAJ15CAHE3_A/I provides symmetrical clamping in both directions, making it ideal for differential buses or transformer-isolated interfaces.
What is the thermal resistance of SMAJ15CAHE3_A/I, and how does it impact power dissipation?
The SMAJ15CAHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on the minimum recommended 0.2" × 0.2" copper pads. This means a 3.3 W steady-state power dissipation (PD) raises the junction temperature by ~400 °C above ambient-so the device relies on short-duration pulse operation rather than continuous dissipation. Its 400 W peak rating applies only to transient events, not DC loading. The SMAJ15CAHE3_A/I is not intended for sustained power regulation.
Does SMAJ15CAHE3_A/I meet lead-free reflow requirements?
Yes, SMAJ15CAHE3_A/I is rated for lead-free reflow with a maximum peak temperature of 260 °C and meets MSL Level 1 per J-STD-020. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards, and it passes JESD 201 Class 2 whisker testing. No pre-baking is required prior to reflow, supporting high-yield, high-throughput SMT manufacturing. The SMAJ15CAHE3_A/I is fully RoHS-compliant and halogen-free.
SMAJ15CAHE3_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):
- 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_A/I FAQ
1.How can I place an order for SMAJ15CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ15CAHE3_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 SMAJ15CAHE3_A/I reliable?
The price and inventory of SMAJ15CAHE3_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 SMAJ15CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ15CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ15CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ15CAHE3_A/I?
SMAJ15CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ15CAHE3_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 SMAJ15CAHE3_A/I?
For technical support, including SMAJ15CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ15CAHE3_A/I requirements.
6.How does Aetrix verify that SMAJ15CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ15CAHE3_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 SMAJ15CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ15CAHE3_A/I?
All SMAJ15CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ15CAHE3_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 SMAJ15CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMAJ15CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ15CAHE3_A/I Tags
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