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Vishay General Semiconductor - Diodes Division SMBJ14CAHE3_A/H
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- Part No.:
- SMBJ14CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14CAHE3_A/H.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,752
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Product details
Overview
SMBJ14CAHE3_A/H 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 and power lines. It features a 14 V standoff voltage (VWM), 23.2 V maximum clamping voltage at 25.9 A peak pulse current (10/1000 µs), and 600 W peak pulse power capability - deployed to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ14CAHE3_A/H datasheet, SMBJ14CAHE3_A/H pinout, SMBJ14CAHE3_A/H application, or SMBJ14CAHE3_A/H equivalent, key selection criteria include bidirectional surge clamping performance, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protector using an avalanche breakdown junction. Its bidirectional symmetry enables identical clamping behavior in both polarities, eliminating polarity-sensitive layout constraints. The glass-passivated silicon die ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM).
Designed for transient immunity per IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT), it delivers sub-nanosecond response time and low incremental surge resistance. Thermal derating follows J-STD-020 MSL Level 1 profile, with maximum junction temperature of +150 °C and peak reflow temperature of 260 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 14 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below circuit rail. |
| VBR min/max (Breakdown Voltage) | 15.6 V / 17.2 V at 1.0 mA - Ensures reliable turn-on within tight tolerance; guarantees clamping activation before downstream component damage. |
| VC (Clamping Voltage) | 23.2 V at IPPM = 25.9 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; determines minimum IC withstand rating. |
| PPPM (Peak Pulse Power) | 600 W - Sustains high-energy transients without failure; validated under repetitive 0.01% duty cycle conditions. |
| ID (Reverse Leakage) | ≤1.0 µA at VWM - Minimizes standby power loss and avoids false triggering in low-current sensor interfaces. |
| RθJA | 100 °C/W - Defines thermal rise under power dissipation; requires PCB copper pad area ≥0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress; suffix HE3 denotes qualification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 1) | Transient return path (bidirectional) | Provides low-impedance surge shunt to ground or rail in either polarity; connects to protected line. |
| Cathode (Terminal 2) | Transient return path (bidirectional) | Electrically identical to Anode; completes symmetrical clamping path - no cathode band marking on bidirectional variants. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy surges from inductive switching or lightning-induced coupling in industrial environments. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive subsystems requiring extended temperature operation and long-term reliability. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity limitations or baking requirements. |
| Glass-passivated junction | Ensures stable VBR over lifetime and improved resistance to humidity-induced parameter drift. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and feedback sensing lines against back-EMF spikes during MOSFET switching in 24 V DC motor controllers. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed across gate-source or supply-rail inputs to limit transient overvoltage to <23.2 V. Use Value: Prevents gate oxide rupture in logic-level MOSFETs and maintains ADC reference integrity during load dump events. |
Use Scenario: Surge suppression on LIN bus lines and sensor inputs (e.g., ambient temperature, door position) in BCM ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element absorbing ESD (±8 kV contact) and EFT bursts (40 A, 5/50 ns) per ISO 16750-2. Use Value: Eliminates need for separate unidirectional devices on differential or AC-coupled signals; reduces BOM count by 50% vs. dual-diode solutions. |
| Telecom Power Interface | Consumer Sensor Hub |
|
Use Scenario: Input-stage protection on 48 V PoE-powered base station modules exposed to lightning-induced surges on Ethernet pairs. IC Role / Device Role / Timing Role: Primary clamping device on secondary-side DC rails, coordinated with upstream GDT or MOV. Use Value: Limits let-through voltage to <23.2 V during 600 W transients, preserving downstream DC-DC converter ICs rated for 28 V absolute max. |
Use Scenario: ESD protection for I²C and analog sensor inputs (e.g., humidity, accelerometer) in smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF at 0 V) bidirectional clamp placed directly at connector interface. Use Value: Maintains signal integrity up to 400 kHz I²C clock rate while passing ±15 kV air discharge per IEC 61000-4-2 Level 4. |
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), same VWM/VC/PPPM specs, RoHS-compliant, packaged in 7" tape/reel (750 pcs). | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and lifecycle assurance is not critical. |
| SAC14CA | Same VWM (14 V) and bidirectional function but lower PPPM (400 W), smaller SOD-123FL package, higher RθJA (150 °C/W). | Lower surge handling limits use to low-energy interfaces (e.g., USB, audio); unsuitable for motor drive or PoE input stages. | Choose only for space-constrained consumer applications with verified ≤400 W surge exposure and adequate thermal relief. |
Compared with SMBJ14CAHE3_A/H, SMBJ14CA-E3/52 offers identical electrical protection but omits automotive qualification and traceability, while SAC14CA trades surge robustness and thermal performance for footprint reduction - making SMBJ14CAHE3_A/H the sole choice for AEC-Q101–mandated, high-energy industrial or automotive deployments.
Availability
SMBJ14CAHE3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power interfaces requiring stable component supply, AEC-Q101 compliance, and repeatable surge immunity performance.
Supply support for SMBJ14CAHE3_A/H 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, precision, and application-specific optimization.
The SMBJ series targets high-reliability transient suppression in harsh environments - engineered for consistent clamping performance across temperature, lifetime, and surge repetition, especially in automotive and industrial power systems.
FAQ
What does the "CA" suffix indicate in SMBJ14CAHE3_A/H?
The "CA" suffix denotes a bidirectional configuration, meaning SMBJ14CAHE3_A/H provides symmetrical clamping for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SMBJ14A), it has no polarity marking and functions identically regardless of voltage polarity applied across its terminals - essential for protecting AC-coupled or floating signal paths.
Is SMBJ14CAHE3_A/H suitable for automotive applications?
Yes - SMBJ14CAHE3_A/H is AEC-Q101 qualified, as confirmed by the "HE3" suffix and Vishay documentation. It undergoes rigorous stress testing including temperature cycling, high-temperature reverse bias, and ESD, making it appropriate for under-hood and cabin ECUs where reliability across -55 °C to +150 °C is mandatory.
What is the maximum clamping voltage of SMBJ14CAHE3_A/H under surge conditions?
The maximum clamping voltage (VC) of SMBJ14CAHE3_A/H is 23.2 V at a peak pulse current (IPPM) of 25.9 A with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
How does the SMB (DO-214AA) package of SMBJ14CAHE3_A/H affect thermal performance?
The SMB (DO-214AA) package of SMBJ14CAHE3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" copper pads per terminal. This requires careful PCB layout to avoid thermal runaway during repetitive surges - insufficient copper area increases junction temperature and degrades clamping consistency.
Can SMBJ14CAHE3_A/H replace unidirectional TVS diodes in existing designs?
SMBJ14CAHE3_A/H can replace unidirectional diodes only if the circuit topology supports bidirectional clamping - such as across differential lines, transformer-coupled interfaces, or floating supplies. It must not be used where DC bias polarity is critical (e.g., anode-to-rail configurations), as its symmetrical structure lacks defined cathode orientation.
SMBJ14CAHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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_A/H FAQ
1.How can I place an order for SMBJ14CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14CAHE3_A/H 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_A/H reliable?
The price and inventory of SMBJ14CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ14CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ14CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14CAHE3_A/H?
SMBJ14CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14CAHE3_A/H 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_A/H?
For technical support, including SMBJ14CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14CAHE3_A/H requirements.
6.How does Aetrix verify that SMBJ14CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ14CAHE3_A/H 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_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ14CAHE3_A/H?
All SMBJ14CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14CAHE3_A/H, 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_A/H part is unused and in its original packaging.
Return procedure for SMBJ14CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ14CAHE3_A/H Tags
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