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Vishay General Semiconductor - Diodes Division SMBJ14CAHM3/H
- Part No.:
- SMBJ14CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14CAHM3/H.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,747
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Product details
Overview
SMBJ14CAHM3/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal and power lines. It features a 14 V stand-off voltage (VWM), 23.2 V maximum clamping voltage at 25.9 A peak pulse current (IPPM), and 600 W peak pulse power capability with a 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ14CAHM3/H datasheet, SMBJ14CAHM3/H pinout, SMBJ14CAHM3/H application, or SMBJ14CAHM3/H equivalent, this device is selected for robust ESD and surge protection where bidirectional clamping, low clamping ratio (VC/VWM ≈ 1.66), and AEC-Q101 qualification (via HM3 suffix) are required in automotive-grade commercial designs.
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 constraints. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while the low incremental surge resistance supports consistent clamping under repetitive transient events.
The SMBJ14CAHM3/H is rated for TJ = –55 °C to +150 °C operation and meets MSL Level 1 per J-STD-020 with 260 °C lead-free reflow compatibility. Its thermal resistance (RθJA = 100 °C/W) reflects standard PCB mounting on 0.2" × 0.2" copper pads, and it delivers 23.2 V clamping at 25.9 A IPPM - verified per ANSI/IEEE C62.35 standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range. |
| VBR min / max | 15.6 V / 17.2 V at IT = 1.0 mA - guaranteed breakdown onset window; ensures predictable turn-on margin above VWM. |
| VC @ IPPM | 23.2 V at 25.9 A - clamped voltage during 10/1000 µs surge; determines protected circuit's maximum stress level. |
| PPPM | 600 W - peak transient energy handling capacity; supports IEC 61000-4-5 Level 4 surge immunity testing. |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage; avoids signal distortion or bias shift in high-impedance sensor interfaces. |
| TJ max | +150 °C - extended junction temperature rating enables use in under-hood automotive or enclosed industrial enclosures. |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals function as interchangeable anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as current entry point during positive or negative transients; no fixed polarity required. |
| Terminal 2 | Anode/Cathode (bidirectional) | Paired terminal completing the symmetrical clamping path; enables placement across differential lines or AC rails without orientation check. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, RS-485 buses, or ungrounded sensor outputs without external polarity management. |
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 combination wave surges up to 4 kV (open-circuit) / 2 kA (short-circuit) when properly laid out. |
| Halogen-free, RoHS-compliant (HM3 suffix) | Meets environmental compliance requirements for automotive and industrial OEMs requiring green material declarations. |
| AEC-Q101 qualified | Validated for automotive electronics per stress test conditions including HTOL, TCT, and ESD-HBM ≥ 8 kV - suitable for body control modules and infotainment power rails. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements. |
Applications
| Automotive Body Control Module | Industrial RS-485 Communication Port |
|---|---|
Use Scenario: Protecting LIN bus and power supply inputs in door module ECUs exposed to load dump and jump-start transients. IC Role / Device Role: Bidirectional TVS placed across VBAT and GND, and across LIN signal pair (LIN_H/L). Use Value: Clamps 12 V system surges to ≤23.2 V, preventing damage to 3.3 V/5 V microcontrollers and transceivers without adding polarity-sensitive components. |
Use Scenario: Safeguarding RS-485 transceivers in factory automation PLCs connected to long cable runs subject to lightning-induced surges. IC Role / Device Role: Differential-line TVS mounted across A/B terminals and common-mode across A-GND/B-GND. Use Value: Maintains signal integrity by limiting common-mode transients to <24 V while preserving DC bias and data rate up to 20 Mbps. |
| Telecom Power Input Stage | Consumer Appliance Motor Driver Interface |
Use Scenario: Input protection for PoE-powered network switches handling induced surges from Ethernet cabling and AC adapter coupling. IC Role / Device Role: Bidirectional TVS on 48 V DC input rail and on data pairs upstream of isolation transformers. Use Value: Absorbs 600 W transients without degradation, ensuring uninterrupted operation during IEEE 802.3af/at surge events. |
Use Scenario: Shielding MCU GPIOs and gate drivers in washing machine motor control boards from commutation spikes. IC Role / Device Role: Localized TVS on half-bridge driver enable lines and current-sense amplifier inputs. Use Value: Limits inductive kickback to <24 V, preventing latch-up in 3.3 V logic and false triggering of overcurrent protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14CAHE3/H | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification; same electrical specs and SMB package. | Approved for commercial/industrial use only; not certified for automotive production environments. | Select when AEC-Q101 is not required and halogen-free materials are not mandated by end-customer specifications. |
| SMAJ14CAHM3 | Lower PPPM (400 W vs. 600 W); SMA (DO-214AC) package - smaller footprint (4.57 mm × 2.79 mm) and higher RθJA (140 °C/W). | Acceptable for lower-energy transients (IEC 61000-4-2 ESD only); limited thermal margin in sustained surge scenarios. | Choose for space-constrained layouts where 400 W surge rating suffices and automotive qualification is retained. |
Compared with SMBJ14CAHE3/H, the SMBJ14CAHM3/H adds halogen-free construction and AEC-Q101 validation without sacrificing clamping performance; versus SMAJ14CAHM3, it delivers 50 % higher surge power handling and superior thermal dissipation in the larger SMB outline - critical for automotive and industrial field reliability.
Availability
SMBJ14CAHM3/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial communication ports, telecom power inputs, and consumer appliance motor control systems requiring stable component supply with full traceability and lifecycle support.
Supply support for SMBJ14CAHM3/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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was developed for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and AEC-Q101 compliance are mandatory design requirements.
FAQ
What is the clamping voltage of SMBJ14CAHM3/H at its rated peak pulse current?
The SMBJ14CAHM3/H has a maximum clamping voltage (VC) of 23.2 V at its specified peak pulse current (IPPM) of 25.9 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during surge events - a key parameter for ensuring downstream ICs remain within absolute maximum ratings.
Is SMBJ14CAHM3/H suitable for automotive applications?
Yes, SMBJ14CAHM3/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction validated for automotive use. It meets stress test requirements including high-temperature operating life, temperature cycling, and ESD-HBM ≥ 8 kV - making it appropriate for body control modules, infotainment power supplies, and ADAS sensor interfaces.
How does the bidirectional design of SMBJ14CAHM3/H affect circuit layout?
The bidirectional design of SMBJ14CAHM3/H eliminates polarity marking and allows placement across AC-coupled lines, differential buses (e.g., RS-485), or ungrounded signal paths without orientation verification. This simplifies PCB layout, reduces BOM complexity, and avoids misplacement risk - unlike unidirectional TVS diodes that require strict cathode/anode alignment relative to ground.
What is the maximum operating temperature for SMBJ14CAHM3/H?
The SMBJ14CAHM3/H has a maximum junction temperature (TJ max) of +150 °C and operates across –55 °C to +150 °C. This wide range supports deployment in engine bay modules, industrial drives, and enclosed power supplies where ambient temperatures exceed 105 °C - provided thermal design accounts for RθJA = 100 °C/W with recommended 0.2" × 0.2" copper pads.
Does SMBJ14CAHM3/H meet any safety certifications?
Yes, SMBJ14CAHM3/H carries Underwriters Laboratories (UL) recognition under file E136766 for both unidirectional and bidirectional configurations, compliant with UL 497B for signal line protectors. It also meets MSL Level 1 per J-STD-020 and is rated for lead-free reflow up to 260 °C - supporting full regulatory compliance in North America, EU, and Asia markets.
SMBJ14CAHM3/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:
- 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:
- 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)
SMBJ14CAHM3/H FAQ
1.How can I place an order for SMBJ14CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14CAHM3/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 SMBJ14CAHM3/H reliable?
The price and inventory of SMBJ14CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ14CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMBJ14CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14CAHM3/H?
SMBJ14CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14CAHM3/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 SMBJ14CAHM3/H?
For technical support, including SMBJ14CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14CAHM3/H requirements.
6.How does Aetrix verify that SMBJ14CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ14CAHM3/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 SMBJ14CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMBJ14CAHM3/H?
All SMBJ14CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14CAHM3/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 SMBJ14CAHM3/H part is unused and in its original packaging.
Return procedure for SMBJ14CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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