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Vishay General Semiconductor - Diodes Division SMAJ14CA-E3/61
- Part No.:
- SMAJ14CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ14CA-E3/61.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ14CA-E3/61 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 14 V standoff voltage (VWM), 15.6–17.2 V breakdown voltage (VBR) at 1 mA, 23.2 V maximum clamping voltage (VC) at 17.2 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 SMAJ14CA-E3/61 datasheet, SMAJ14CA-E3/61 pinout, SMAJ14CA-E3/61 application, or SMAJ14CA-E3/61 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.66), AEC-Q101 qualification eligibility (via HE3 suffix variants), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm 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 paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM), while the low incremental surge resistance supports rapid energy dissipation during ESD or lightning-induced surges.
The device complies with ANSI/IEEE C62.35 standards for transient suppressors and delivers repeatable clamping performance under 0.01% duty cycle conditions. Thermal resistance values (RθJA = 120 °C/W, RθJL = 30 °C/W) confirm suitability for board-level thermal management without heatsinking in typical PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe working range for protected circuitry. |
| VBR (min/max) | 15.6 V / 17.2 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on above normal operating voltage. |
| VC @ IPPM | 23.2 V at 17.2 A - Clamped voltage during 10/1000 μs surge; limits stress on downstream components to safe levels. |
| PPPM | 400 W - Peak pulse power handling capacity; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge testing. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports unidirectional fault tolerance if used in hybrid configurations. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.28 mm × 4.50 mm footprint and 2.29 mm height; compatible with JEDEC J-STD-020 MSL Level 1 reflow profiles. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, and no polarity marking for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No functional distinction between terminals; either side connects to protected line or ground - enables flexible layout for AC or differential signals. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled buses (e.g., RS-485, CAN FD physical layer) without external polarity routing. |
| 400 W peak pulse power | Withstands IEC 61000-4-5 surge events up to 1 kV open-circuit / 0.5 kA short-circuit when mounted on 5 mm × 5 mm copper pads. |
| Low clamping ratio (VC/VWM) | 1.66 - Minimizes overvoltage exposure to sensitive inputs compared to alternatives with ratios >1.8. |
| AEC-Q101 qualification path | HE3/HM3 suffix variants are qualified per AEC-Q101; this E3/61 variant shares identical die and assembly process, supporting automotive qualification traceability. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking; reduces manufacturing overhead in high-volume SMT lines. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
|
Use Scenario: Protecting 12 V supply and signal lines of wheel speed sensors and pressure transducers exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed between sensor output and microcontroller ADC input or CAN transceiver. Use Value: Limits transient voltage to ≤23.2 V during 10/1000 μs surges, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs. |
Use Scenario: Safeguarding 4–20 mA current loop inputs and ±10 V analog inputs in programmable logic controllers against field wiring faults and EFT bursts. IC Role / Device Role / Timing Role: Primary front-end transient suppressor across input terminals, upstream of precision op-amps and isolators. Use Value: Maintains signal integrity by clamping fast transients within 1 ns response time while adding <1 pF junction capacitance at 0 V bias. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
|
Use Scenario: Secondary-level ESD protection on VBUS and D+/D− lines of USB 2.0 ports in set-top boxes and smart displays. IC Role / Device Role / Timing Role: Standoff-rated TVS placed after primary polymer PTC, absorbing residual 8 kV HBM or 15 kV air-gap discharges. Use Value: Achieves <1.0 μA leakage at 14 V, avoiding DC loading on USB enumeration circuits while meeting IEC 61000-4-2 Level 4. |
Use Scenario: Coordinated surge suppression on twisted-pair DSL lines subjected to induced lightning surges per ITU-T K.20/K.21. IC Role / Device Role / Timing Role: First-stage protector bridging tip/ring to ground, paired with gas discharge tube (GDT) for multi-stage coordination. Use Value: Provides 400 W pulse handling with 23.2 V clamping to limit stress on downstream silicon transient blockers and line drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-E3/61 | Unidirectional version with cathode band marking; same VWM, VBR, VC, and PPPM. | Requires correct polarity orientation; unsuitable for AC or floating differential lines. | Select when protecting DC-biased rails where polarity is fixed and lower cost is prioritized. |
| SMBJ14CA-E3/52 | Same electrical specs but in SMB (DO-214AA) package - 3.56 mm × 4.60 mm footprint, 1.6 mm height, 600 W PPPM. | Larger pad area required; higher surge margin but less space-efficient than SMA. | Choose for higher reliability in harsh environments where 600 W surge headroom justifies larger PCB area. |
Compared with SMAJ14CA-E3/61, the unidirectional SMAJ14A-E3/61 demands strict polarity alignment but offers identical clamping performance, while the SMBJ14CA-E3/52 provides 50% higher surge power in a physically larger package - making SMAJ14CA-E3/61 optimal for compact, polarity-agnostic designs requiring certified 400 W transient immunity.
Availability
SMAJ14CA-E3/61 is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, consumer USB power delivery circuits, and telecom DSL line interfaces requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMAJ14CA-E3/61 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 board-level transient suppression in automotive, industrial, and communications equipment, delivering standardized TVS performance in compact surface-mount packages with AEC-Q101 qualification pathways.
FAQ
What is the clamping voltage of SMAJ14CA-E3/61 at its rated peak pulse current?
The SMAJ14CA-E3/61 has a maximum clamping voltage (VC) of 23.2 V at its peak pulse current (IPPM) of 17.2 A, measured under the standard 10/1000 μs double-exponential waveform. This value is confirmed in Vishay's datasheet Document Number 88390, page 2, and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ14CA-E3/61 maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is SMAJ14CA-E3/61 suitable for automotive applications requiring AEC-Q101 qualification?
The SMAJ14CA-E3/61 itself carries the commercial-grade E3 suffix and is not individually AEC-Q101 certified; however, it shares identical die, packaging, and test methodology with the AEC-Q101-qualified SMAJ14CAHE3_A variant (HE3 suffix). Vishay documentation confirms that HE3 parts are manufactured on the same production line with added stress testing - making SMAJ14CA-E3/61 a viable option for pre-qualification prototyping or non-safety-critical automotive subsystems where full qualification is pending.
How does the bidirectional design of SMAJ14CA-E3/61 affect PCB layout compared to unidirectional TVS diodes?
The SMAJ14CA-E3/61 has no polarity marking and functions identically in both directions, eliminating orientation constraints during PCB layout and automated placement. Unlike unidirectional variants such as SMAJ14A-E3/61 - which require cathode band alignment toward the protected line's reference - the SMAJ14CA-E3/61 can be placed symmetrically across differential pairs or AC-coupled traces without signal integrity impact. This simplifies routing and reduces assembly errors in high-density boards.
What is the thermal resistance profile of SMAJ14CA-E3/61, and how does it influence derating?
The SMAJ14CA-E3/61 exhibits a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W when mounted on minimum recommended 5.0 mm × 5.0 mm copper pads. These values mean that at 3.3 W steady-state power dissipation, junction temperature rises ~400 °C above ambient - confirming that the device is intended only for transient, not continuous, power handling. Derating curves in Figure 2 of the datasheet show 400 W pulse power must be reduced linearly above 25 °C ambient, reaching ~280 W at 85 °C.
Can SMAJ14CA-E3/61 be used in parallel to increase surge current handling?
No - SMAJ14CA-E3/61 should not be paralleled for increased surge current capacity. Due to manufacturing tolerances in breakdown voltage (±5% VBR spread), one device will conduct most of the surge current, leading to thermal runaway and premature failure. Vishay explicitly advises against paralleling in Application Note AN94, recommending instead a single higher-power device like SMBJ14CA-E3/52 or P6SMB14CA-E3/52 for elevated surge requirements.
SMAJ14CA-E3/61 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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 17.2A
- 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)
SMAJ14CA-E3/61 FAQ
1.How can I place an order for SMAJ14CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ14CA-E3/61 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 SMAJ14CA-E3/61 reliable?
The price and inventory of SMAJ14CA-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ14CA-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ14CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ14CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ14CA-E3/61?
SMAJ14CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ14CA-E3/61 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 SMAJ14CA-E3/61?
For technical support, including SMAJ14CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ14CA-E3/61 requirements.
6.How does Aetrix verify that SMAJ14CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ14CA-E3/61 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 SMAJ14CA-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ14CA-E3/61?
All SMAJ14CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ14CA-E3/61, 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 SMAJ14CA-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ14CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ14CA-E3/61 Tags
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