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Vishay General Semiconductor - Diodes Division SMBJ14CAHE3/52
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- Part No.:
- SMBJ14CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14CAHE3/52.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,717
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Product details
Overview
SMBJ14CAHE3/52 from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 14 V stand-off voltage (VWM), 23.2 V maximum clamping voltage (VC) at 25.9 A peak pulse current (IPPM), and 600 W peak pulse power dissipation with a 10/1000 µs waveform - deployed on power rails and signal lines in industrial sensor interfaces.
For engineers reviewing the SMBJ14CAHE3/52 datasheet, SMBJ14CAHE3/52 pinout, SMBJ14CAHE3/52 application, or SMBJ14CAHE3/52 equivalent, this AEC-Q101 qualified TVS offers verified bidirectional clamping performance, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for automotive-grade ECU protection, industrial I/O conditioning, and telecom surge immunity design validation.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 15.6 V (min) to 17.2 V (max) at 1.0 mA test current, and reverse leakage (ID) ≤1.0 µA at 14 V stand-off. Its thermal resistance junction-to-ambient (RθJA) is 100 °C/W on standard 0.2" × 0.2" copper pads, enabling reliable operation up to +150 °C junction temperature.
The device delivers fast response time (<1 ps), low clamping ratio (VC/VWM = 1.66), and meets UL 497B recognition (QVGQ2). It is rated for repetitive 0.01% duty cycle surges and complies with ANSI/IEEE C62.35 standards for transient suppression - making it suitable for IEC 61000-4-2/4-4/4-5 compliant system-level protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 14 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 15.6–17.2 V at 1.0 mA - Confirmed symmetrical conduction onset in both directions for bidirectional transients |
| VC (Clamping Voltage) | 23.2 V at 25.9 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge event |
| PPPM (Peak Pulse Power) | 600 W - Sustains high-energy transients without failure under standardized 10/1000 µs waveform |
| IPPM (Peak Pulse Current) | 25.9 A - Maximum non-repetitive surge current the device safely clamps without degradation |
| TJmax | +150 °C - Enables use in under-hood automotive and high-temperature industrial environments |
| MSL Level | Level 1 (J-STD-020) - No floor life limitation; supports standard reflow without baking |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bidirectional) | Surge current path (reversible) | Both terminals function identically; connects across protected line and ground (or between differential lines) without orientation dependency |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines (e.g., RS-485, CAN, USB D+/D−) without polarity concerns |
| AEC-Q101 qualification | Validated for automotive applications including engine control modules, body electronics, and ADAS sensor interfaces |
| 600 W peak pulse rating | Withstands IEC 61000-4-5 Level 4 (4 kV, 2 Ω source) surges on 24 V systems with margin |
| Low clamping ratio (1.66) | Minimizes stress on downstream ICs by limiting clamped voltage to just 66% above VWM |
| UL 497B recognized (QVGQ2) | Meets safety requirements for telecom and industrial communication port protection without additional certification effort |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine bay environments subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS placed between sensor signal line and chassis ground to clamp ±200 V transients within 1 ns. Use Value: Prevents latch-up or gate oxide damage in downstream op-amps and ADCs while maintaining signal integrity below 14 V nominal range. |
Use Scenario: Shielding half-duplex RS-485 transceivers (e.g., SN65HVD230) against ESD and lightning-induced surges on factory-floor cabling. IC Role / Device Role / Timing Role: Placed differentially across A/B bus lines and common-mode to ground to suppress common- and differential-mode transients. Use Value: Maintains data integrity up to 10 Mbps by limiting bus voltage excursion to ≤23.2 V during 1 kA surge events per IEC 61000-4-5. |
| Telecom DSL Line Card | Consumer Appliance Motor Control |
|
Use Scenario: Safeguarding ADSL/VDSL line drivers and SLIC circuits from induced surges on outdoor telephone wiring. IC Role / Device Role / Timing Role: Connected between tip/ring and ground in parallel with gas discharge tube (GDT) for hybrid primary/secondary protection. Use Value: Provides fast-response secondary clamping after GDT fires, reducing let-through voltage to <25 V and preventing IC destruction. |
Use Scenario: Protecting microcontroller GPIOs and gate drivers in washing machine motor inverters exposed to inductive kickback from BLDC commutation. IC Role / Device Role / Timing Role: Mounted directly at MCU I/O pins and MOSFET gate-source terminals to absorb sub-100 ns switching spikes. Use Value: Eliminates false triggering and resets caused by >100 V transients, extending field reliability beyond 10 years MTBF. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14CA-E3/52 | Commercial-grade (non-AEC-Q101); identical electrical specs and SMB package | Lacks automotive qualification; unsuitable for under-hood or safety-critical ECUs | Select when cost-sensitive industrial or consumer designs do not require automotive reliability validation |
| SMCJ14CAHE3/52 | Same VWM/VC, but SMC (DO-214AB) package - 27% larger footprint, 1500 W PPPM | Higher power handling enables longer surge duration tolerance; requires PCB layout change | Choose for legacy 1.5 kV IEC 61000-4-5 compliance where 600 W is insufficient |
Compared with SMBJ14CAHE3/52, the E3/52 variant trades automotive qualification for lower cost in non-automotive settings, while the SMCJ14CAHE3/52 provides higher surge energy absorption at the expense of board space - enabling tiered protection architecture based on threat level and layout constraints.
Availability
SMBJ14CAHE3/52 is available at Aetrix Electronics and suitable for automotive ECU protection, industrial RS-485 interface hardening, and telecom DSL line card surge immunity requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ14CAHE3/52 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, automotive, and computing applications.
The SMBJ series targets board-level transient protection with optimized clamping performance, AEC-Q101 qualification, and surface-mount scalability - engineered for robustness in harsh electromagnetic environments.
FAQ
What is the clamping voltage of SMBJ14CAHE3/52 at its rated peak pulse current?
The SMBJ14CAHE3/52 has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated 25.9 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured across both terminals in either direction and ensures downstream ICs experience limited overvoltage stress during surge events. The SMBJ14CAHE3/52 maintains this clamping performance consistently across its full operating temperature range.
Is SMBJ14CAHE3/52 suitable for automotive applications?
Yes, SMBJ14CAHE3/52 is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix, confirming validation for engine control units, body control modules, and ADAS sensor interfaces. Its construction meets JESD201 Class 2 whisker resistance, MSL Level 1 reflow compatibility, and UL 497B recognition - all required for Tier 1 automotive supply chain compliance. The SMBJ14CAHE3/52 is not a commercial-grade alternative but a fully qualified automotive part.
How does the bidirectional configuration of SMBJ14CAHE3/52 affect PCB layout?
The SMBJ14CAHE3/52 has no polarity marking and functions identically in both directions, eliminating orientation constraints during automated placement. Engineers can mount it across any two nodes requiring symmetrical overvoltage protection - such as differential signal pairs (CAN H/L, RS-485 A/B) or AC-coupled lines - without verifying anode/cathode alignment. This simplifies layout, reduces assembly errors, and avoids costly rework associated with unidirectional TVS misplacement. The SMBJ14CAHE3/52's DO-214AA footprint remains unchanged regardless of orientation.
What is the maximum operating temperature for SMBJ14CAHE3/52?
The SMBJ14CAHE3/52 supports a junction temperature range of –55 °C to +150 °C, with derating applied above 25 °C ambient per Figure 2 in the datasheet. At 100 °C ambient, its peak pulse power capability reduces to approximately 360 W (60% of 600 W), while still maintaining full clamping performance. This extended thermal range makes the SMBJ14CAHE3/52 suitable for under-hood automotive locations and industrial enclosures without forced cooling.
Does SMBJ14CAHE3/52 meet UL safety standards?
Yes, SMBJ14CAHE3/52 is Underwriters Laboratories (UL) recognized under file E136766 for both unidirectional and bidirectional configurations, complying with UL 497B for telecommunications protectors. This certification covers dielectric strength, flammability (UL 94 V-0 molding compound), and surge endurance - allowing direct use in UL-certified end equipment without additional system-level testing. The SMBJ14CAHE3/52's UL listing applies specifically to its HE3 variant and is documented in Vishay's QVGQ2 recognition report.
SMBJ14CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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):
- 25.9A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SMBJ14CAHE3/52 FAQ
1.How can I place an order for SMBJ14CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14CAHE3/52 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 SMBJ14CAHE3/52 reliable?
The price and inventory of SMBJ14CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ14CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ14CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14CAHE3/52?
SMBJ14CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14CAHE3/52 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 SMBJ14CAHE3/52?
For technical support, including SMBJ14CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14CAHE3/52 requirements.
6.How does Aetrix verify that SMBJ14CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ14CAHE3/52 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 SMBJ14CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ14CAHE3/52?
All SMBJ14CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14CAHE3/52, 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 SMBJ14CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ14CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ14CAHE3/52 Tags
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