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Vishay General Semiconductor - Diodes Division SMAJ14CAHE3/61
- Part No.:
- SMAJ14CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ14CAHE3/61.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,509
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Product details
Overview
SMAJ14CAHE3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection on signal and power lines. It features a 14 V standoff voltage (VWM), 15.6–17.2 V breakdown range (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 - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the SMAJ14CAHE3/61 datasheet, SMAJ14CAHE3/61 pinout, SMAJ14CAHE3/61 application, or SMAJ14CAHE3/61 equivalent, this AEC-Q101-qualified, RoHS-compliant SMA (DO-214AC) package device delivers verified clamping performance, low leakage (<1.0 μA at VWM), and MSL Level 1 moisture sensitivity - critical for high-reliability board-level surge immunity design.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable VBR tolerance (±5%) and fast response time (<1.0 ps), while the low incremental surge resistance (rd) sustains effective clamping under repetitive transients up to 0.01% duty cycle.
The device is rated for -55 °C to +150 °C operating junction temperature and exhibits a VBR temperature coefficient of +0.087 %/°C. Thermal resistance is 120 °C/W (junction-to-ambient, on 0.2" × 0.2" copper pads) and 30 °C/W (junction-to-lead), supporting reliable power dissipation in compact layouts without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 14 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 15.6–17.2 V at 1 mA - Confirmed breakdown range where device transitions into avalanche conduction; ensures predictable turn-on behavior. |
| VC (Clamping Voltage) | 23.2 V at 17.2 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge; directly limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 400 W - Sustained energy absorption capability per transient event; sufficient for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surges. |
| IPPM (Peak Pulse Current) | 17.2 A - Maximum non-repetitive surge current the device safely diverts without degradation. |
| ID (Reverse Leakage) | <1.0 μA at 14 V - Negligible standby current; avoids signal distortion or power loss in high-impedance circuits. |
| TJmax | +150 °C - Enables operation in under-hood automotive or enclosed industrial environments without thermal derating. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking for bidirectional types; symmetrical terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as input/output for transient energy; no cathode band marking required. |
| Case (body) | Thermal and mechanical interface | Non-electrical; provides mechanical anchoring and contributes to thermal dissipation via PCB copper pads. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS, and infotainment systems. |
| 400 W peak pulse power (10/1000 μs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and telecom equipment without external heat sinking. |
| Low clamping ratio (VC/VWM = 1.66) | Minimizes voltage overshoot during transients - protects 15 V-rated logic and analog front-ends with margin. |
| MSL Level 1 (260 °C peak reflow) | Compatible with standard lead-free SMT assembly processes without pre-baking or special handling. |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal/humidity stress - critical for 10+ year field life. |
Applications
| Automotive Sensor Interface | Industrial PLC Digital I/O |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching spikes in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, absorbing ±100 V transients within nanoseconds. Use Value: Prevents latch-up or permanent damage to 12 V rail-connected microcontrollers and signal conditioners exposed to ISO 7637-2 Pulse 1/2a/5a. |
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers against field-wiring induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Standoff-clamp protector mounted at connector entry point, shunting surge energy before reaching optocoupler or FPGA input buffers. Use Value: Maintains functional safety integrity by limiting input voltage to ≤23.2 V during 1 kV/42 Ω IEC 61000-4-5 surges - preserving signal validity and system uptime. |
| Telecom Line Protection | Consumer Power Adapter Feedback Loop |
Use Scenario: Safeguarding Ethernet PHY magnetics and PoE controller pins against lightning-induced common-mode transients on outdoor data links. IC Role / Device Role / Timing Role: Bidirectional TVS bridging differential pair to chassis ground, suppressing >100 ns transients without distorting 100 Mbps signals. Use Value: Achieves <1 pF junction capacitance (typ.) - preserves signal integrity and meets IEEE 802.3af timing margins while passing UL 497B certification. |
Use Scenario: Securing optocoupler feedback path in isolated AC/DC adapters against primary-side MOSFET switching noise coupling into secondary regulation loop. IC Role / Device Role / Timing Role: Low-leakage (≤1 μA) clamp across TL431 reference input, preventing false triggering during 15 kV ESD events. Use Value: Eliminates output voltage drift and shutdown faults caused by transient-induced reference node perturbation - improves adapter reliability and compliance margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14CA-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free material compliance is mandated by OEM or regional regulations. | Choose SMAJ14CA-M3/61 for green manufacturing programs requiring halogen-free bill-of-materials. |
| SMBJ14CAHE3/61 | Same VWM/VC ratings but higher 600 W PPPM; larger SMB (DO-214AA) package with 1.5× footprint area. | Used where higher surge margin is needed (e.g., outdoor telecom enclosures) and PCB space permits larger footprint. | Select SMBJ14CAHE3/61 only if design requires >400 W surge handling and layout accommodates 2.5 mm × 4.2 mm vs. SMA's 2.2 mm × 4.0 mm. |
Compared with SMAJ14CA-M3/61, the SMAJ14CAHE3/61 offers identical surge performance with standard RoHS compliance; versus SMBJ14CAHE3/61, it trades 200 W lower PPPM for 25% smaller PCB area and compatible pick-and-place tooling - optimizing cost and density in space-constrained automotive modules.
Availability
SMAJ14CAHE3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply with AEC-Q101 assurance and full traceability.
Supply support for SMAJ14CAHE3/61 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 high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive applications.
The SMAJ series is engineered specifically for board-level transient suppression in harsh environments - delivering consistent clamping, low leakage, and qualification-grade reliability across temperature and lifetime.
FAQ
What is the clamping voltage of SMAJ14CAHE3/61 at its rated peak pulse current?
The SMAJ14CAHE3/61 has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current of 17.2 A using the standardized 10/1000 μs waveform. This value is measured per JEDEC test conditions and guarantees the protected circuit will not experience more than 23.2 V during such a surge event. The SMAJ14CAHE3/61 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMAJ14CAHE3/61 suitable for automotive applications?
Yes, SMAJ14CAHE3/61 is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix indicating RoHS compliance and automotive-grade reliability testing. It meets requirements for engine control units, body electronics, and ADAS sensors where exposure to load dump, jump start, and ISO 7637-2 transients is expected. The SMAJ14CAHE3/61 operates reliably from -55 °C to +150 °C and passes humidity, temperature cycling, and HTRB validation per AEC-Q101.
How does the bidirectional configuration of SMAJ14CAHE3/61 affect its circuit placement?
The SMAJ14CAHE3/61 is inherently bidirectional, meaning it conducts symmetrically in both forward and reverse bias - eliminating the need for polarity-aware orientation during placement. Unlike unidirectional TVS diodes, the SMAJ14CAHE3/61 has no cathode band marking and can be installed across any two nodes requiring balanced overvoltage protection, such as differential signal pairs or AC-coupled lines. This simplifies layout and reduces BOM complexity in designs like RS-485 or CAN FD interfaces.
What is the maximum reverse leakage current for SMAJ14CAHE3/61 at its standoff voltage?
The SMAJ14CAHE3/61 exhibits a maximum reverse leakage current (ID) of 1.0 μA when biased at its 14 V standoff voltage (VWM) and tested at 25 °C. This ultra-low leakage ensures minimal impact on high-impedance signal paths, battery-powered circuits, or precision analog front-ends. The SMAJ14CAHE3/61 maintains leakage below 5 μA even at elevated temperatures up to 125 °C, supporting stable operation in thermally stressed environments.
Does SMAJ14CAHE3/61 require heatsinking in typical applications?
No, SMAJ14CAHE3/61 does not require external heatsinking in standard applications. Its 400 W peak pulse power rating is validated with mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal - a layout achievable in most SMT designs. With a junction-to-ambient thermal resistance (RθJA) of 120 °C/W under those conditions, the SMAJ14CAHE3/61 safely dissipates single-event surges without exceeding its 150 °C maximum junction temperature. Continuous power dissipation remains limited to 3.3 W, well within PCB copper thermal capacity.
SMAJ14CAHE3/61 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):
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ14CAHE3/61 FAQ
1.How can I place an order for SMAJ14CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ14CAHE3/61 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 SMAJ14CAHE3/61 reliable?
The price and inventory of SMAJ14CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ14CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ14CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ14CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ14CAHE3/61?
SMAJ14CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ14CAHE3/61 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 SMAJ14CAHE3/61?
For technical support, including SMAJ14CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ14CAHE3/61 requirements.
6.How does Aetrix verify that SMAJ14CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ14CAHE3/61 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 SMAJ14CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ14CAHE3/61?
All SMAJ14CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ14CAHE3/61, 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 SMAJ14CAHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ14CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ14CAHE3/61 Tags
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