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Vishay General Semiconductor - Diodes Division SMBJ14CAHE3_B/I
- Part No.:
- SMBJ14CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14CAHE3_B/I.pdf
- Description:
- 600W,14V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,750
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Product details
Overview
SMBJ14CAHE3_B/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 14 V standoff voltage (VWM), 23.2 V maximum clamping voltage (VC) at 25.9 A peak pulse current (IPPM), and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and industrial I/O lines against ESD and inductive switching surges.
For engineers reviewing the SMBJ14CAHE3_B/I datasheet, SMBJ14CAHE3_B/I pinout, SMBJ14CAHE3_B/I application, or SMBJ14CAHE3_B/I equivalent, this device is selected for robust bidirectional surge protection where low clamping ratio, AEC-Q101 qualification, and RoHS-compliant automotive-grade reliability are required in space-constrained PCB layouts.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 15.6–17.2 V (min/max) under 1 mA test current. Its clamping behavior is defined by a low dynamic impedance that ensures rapid voltage limiting during transient events up to 25.9 A (10/1000 µs).
The device meets MSL Level 1 per J-STD-020, supports lead-free reflow up to 260 °C peak, and is qualified to AEC-Q101 for automotive applications. Its junction-to-lead thermal resistance (RθJL) is 20 °C/W, enabling effective heat dissipation during repetitive surge events when mounted on recommended 5.0 mm × 5.0 mm copper pads.
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 IT = 1 mA - Confirmed bidirectional avalanche onset range; ensures symmetrical protection in AC-coupled or floating lines. |
| VC (Clamping Voltage) | 23.2 V at IPPM = 25.9 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; enables compatibility with 24 V systems. |
| PPPM (Peak Pulse Power) | 600 W - Sustained transient energy handling capability; validated per ANSI/IEEE C62.35 with 0.01% duty cycle. |
| IPPM (Peak Pulse Current) | 25.9 A - Maximum non-repetitive surge current supported; derived from VC and PPPM (P = V × I). |
| TJmax | 150 °C - Maximum junction temperature; allows operation in under-hood automotive environments and industrial enclosures. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated placement and reflow processes. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals function as anode and cathode depending on transient polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal conducts during positive or negative transients; no fixed polarity - enables single-device protection of AC or differential lines. |
| Terminal 2 | Anode/Cathode (bidirectional) | Paired terminal completing symmetrical clamping path; identical electrical role to Terminal 1; requires no orientation during placement. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-component protection of AC-coupled, differential, or floating signal paths without external polarity management. |
| AEC-Q101 qualification | Validated for automotive powertrain, body electronics, and ADAS modules requiring zero-failure reliability under thermal cycling and vibration stress. |
| 600 W peak pulse power | Handles high-energy transients from relay coil flyback, motor commutation, or lightning-induced surges in industrial control cabinets. |
| Low clamping ratio (VC/VWM ≈ 1.66) | Minimizes overvoltage stress on downstream ICs - critical for protecting 16 V-rated microcontrollers or CAN transceivers. |
| MSL Level 1 moisture sensitivity | Eliminates bake requirements prior to reflow; supports direct placement into high-volume SMT lines without dry-pack handling. |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
|
Use Scenario: Protecting 12 V/24 V automotive pressure or temperature sensor outputs from load-dump and ISO 7637-2 pulse 5a surges. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across sensor output and ground to shunt transients before reaching ADC input or signal conditioner. Use Value: Maintains signal integrity during 100 V/50 ms load-dump events while keeping clamped voltage below 24 V rail tolerance limits. |
Use Scenario: Safeguarding 4–20 mA current-loop inputs in programmable logic controllers exposed to field-wiring induced surges. IC Role / Device Role / Timing Role: Parallel-connected TVS across loop terminals to limit common-mode transients without disrupting DC loop accuracy. Use Value: Prevents latch-up in precision op-amps and isolators by clamping surges to ≤23.2 V within 1 ns response time. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Shielding Ethernet PHY or RS-485 transceivers on telecom line cards from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary-level TVS on differential pair inputs to absorb >600 W surge energy before secondary protection stages activate. Use Value: Reduces need for multi-stage protection designs - single SMBJ14CAHE3_B/I handles full IEC 61000-4-5 4 kV surge requirement. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in washing machines or HVAC blowers connected to MCU GPIOs. IC Role / Device Role / Timing Role: Clamp placed across motor terminals or H-bridge outputs to divert flyback energy away from gate drivers and logic. Use Value: Extends MOSFET lifetime by limiting VDS overshoot to <24 V during 100 A turn-off events, verified per JEDEC JESD22-A114. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14CAHM3_B/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected only when halogen-free material compliance is mandated by OEM environmental policy. | Choose SMBJ14CAHM3_B/I if halogen-free bill-of-materials is required; otherwise SMBJ14CAHE3_B/I offers standard RoHS compliance. |
| SMAJ14CAHE3/A | Lower 400 W PPPM, SMA (DO-214AC) package (smaller footprint), same VWM/VC but reduced IPPM (17.4 A). | Suitable for lower-energy surges (e.g., ESD-only) or space-constrained consumer PCBs where 600 W headroom is unnecessary. | Select SMAJ14CAHE3/A only when board area is critical and surge threat level is limited to IEC 61000-4-2 ±15 kV contact discharge. |
Compared with SMBJ14CAHM3_B/I, the SMBJ14CAHE3_B/I provides identical surge performance with standard RoHS compliance; versus SMAJ14CAHE3/A, it delivers 50% higher pulse power and superior thermal robustness in industrial and automotive deployments.
Availability
SMBJ14CAHE3_B/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC analog inputs, telecom line cards, and appliance motor drive circuits requiring stable component supply with AEC-Q101 assurance and traceable sourcing.
Supply support for SMBJ14CAHE3_B/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 SMBJ series was developed to deliver high-power, low-clamping TVS performance in compact surface-mount packages for automotive, industrial, and communications infrastructure - balancing surge immunity with manufacturability and thermal resilience.
FAQ
What is the clamping voltage of SMBJ14CAHE3_B/I at its rated peak pulse current?
The SMBJ14CAHE3_B/I has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current of 25.9 A using the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and reflects the actual voltage imposed on protected circuitry during worst-case surge conditions - critical for verifying compatibility with 24 V system rails and downstream IC absolute maximum ratings.
Is SMBJ14CAHE3_B/I suitable for automotive applications?
Yes, SMBJ14CAHE3_B/I is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix "HE3". It undergoes stress testing for temperature cycling, humidity, mechanical shock, and surge endurance per AEC-Q101 Rev D, making it appropriate for engine control units, body control modules, and ADAS sensor interfaces where reliability under harsh environmental conditions is mandatory.
How does the bidirectional configuration of SMBJ14CAHE3_B/I affect PCB layout?
The SMBJ14CAHE3_B/I has no polarity marking and functions identically in either orientation, simplifying PCB layout by eliminating orientation checks during automated placement. This symmetry allows direct placement across differential pairs, AC-coupled lines, or floating grounds without concern for anode/cathode alignment - reducing assembly errors and supporting flexible routing in dense analog or communication interfaces.
What is the thermal resistance from junction to ambient for SMBJ14CAHE3_B/I?
The typical junction-to-ambient thermal resistance (RθJA) of SMBJ14CAHE3_B/I is 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes still air conditions and informs derating calculations for repetitive surge events - for example, at 50 °C ambient, maximum continuous power dissipation drops to 5.0 W per the datasheet's derating curve.
Does SMBJ14CAHE3_B/I meet moisture sensitivity level requirements for lead-free reflow?
Yes, SMBJ14CAHE3_B/I meets MSL Level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions and placed directly into lead-free reflow ovens with peak temperatures up to 260 °C without pre-baking. This eliminates moisture-related popcorning risks and streamlines high-volume manufacturing for industrial and automotive electronics producers.
SMBJ14CAHE3_B/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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):
- 25.9A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ14CAHE3_B/I FAQ
1.How can I place an order for SMBJ14CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14CAHE3_B/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 SMBJ14CAHE3_B/I reliable?
The price and inventory of SMBJ14CAHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ14CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ14CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14CAHE3_B/I?
SMBJ14CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14CAHE3_B/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 SMBJ14CAHE3_B/I?
For technical support, including SMBJ14CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14CAHE3_B/I requirements.
6.How does Aetrix verify that SMBJ14CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ14CAHE3_B/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 SMBJ14CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ14CAHE3_B/I?
All SMBJ14CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14CAHE3_B/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 SMBJ14CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ14CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ14CAHE3_B/I Tags
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