My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ14CAHM3_A/I
- Part No.:
- SMBJ14CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14CAHM3_A/I.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,425
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ14CAHM3_A/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), 15.6–17.2 V breakdown range (VBR at 1 mA), 23.2 V maximum clamping voltage (VC) at 25.9 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and industrial I/O circuits.
For engineers reviewing the SMBJ14CAHM3_A/I datasheet, SMBJ14CAHM3_A/I pinout, SMBJ14CAHM3_A/I application, or SMBJ14CAHM3_A/I equivalent, this part serves as a halogen-free, RoHS-compliant, AEC-Q101-qualified TVS for bidirectional surge protection where low-profile mounting, fast response (<1 ns), and stable clamping under repetitive transients are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and low incremental surge resistance, enabling consistent clamping performance during ESD, lightning-induced surges, and inductive switching events.
The device is rated for 150 °C maximum junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its thermal resistance (RθJA = 100 °C/W) and RθJL = 20 °C/W support reliable operation on standard PCB copper pads without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before significant conduction begins; defines safe operating margin for 12 V nominal systems. |
| VBR (min/max) | 15.6 V / 17.2 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 23.2 V at 25.9 A - Clamped voltage under 600 W 10/1000 µs surge; limits stress on downstream ICs to safe levels. |
| IPPM | 25.9 A - Peak pulse current capability; supports robust protection against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω). |
| PPPM | 600 W - Peak pulse power rating with 0.01% duty cycle; enables repeated transient suppression without thermal runaway. |
| TJ max | 150 °C - Maximum junction temperature; allows operation in under-hood automotive and industrial environments. |
| Package | SMB (DO-214AA) - Low-profile SMD outline (5.21 mm × 4.06 mm × 2.20 mm); compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are symmetrical; device functions identically regardless of orientation on PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 1) | Transient current entry (negative polarity event) | Conducts surge current into device during negative-going transients; forms one half of symmetrical clamping path. |
| Cathode (Terminal 2) | Transient current entry (positive polarity event) | Conducts surge current into device during positive-going transients; completes bidirectional clamping loop with Terminal 1. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - eliminates need for orientation-aware layout in AC-coupled or floating signal lines. |
| 600 W peak pulse power | Withstands 10/1000 µs surges up to 25.9 A - meets IEC 61000-4-5 surge immunity requirements for industrial and telecom ports. |
| Halogen-free & RoHS-compliant | HM3 suffix indicates halogen-free molding compound and RoHS compliance - satisfies environmental mandates for global OEM production. |
| AEC-Q101 qualified | Qualified for automotive applications per AEC-Q101 Rev D - validated for reliability under temperature cycling, HTRB, and surge stress. |
| Low clamping ratio (VC/VWM = 1.66) | 23.2 V clamp at 14 V standoff - minimizes overvoltage exposure to protected ICs while maintaining margin above normal operating voltage. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and current-sense amplifiers from inductive kickback during MOSFET/IGBT switching in 24 V DC motor control units. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rail inputs and signal lines to clamp transients before they reach sensitive analog front-ends or logic-level shifters. Use Value: Limits voltage excursions to ≤23.2 V during 25.9 A surges, preventing latch-up or permanent damage to 3.3 V/5 V microcontrollers and op-amps. |
Use Scenario: Surge suppression on LIN bus lines and sensor supply rails (e.g., ambient temperature, door position) in BCMs exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Fast-response (<1 ns) clamping element placed at connector interface to divert transients before propagation into CAN/LIN transceivers and MCU GPIOs. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 1/2/5a stress by clamping to 23.2 V within nanoseconds - preserving communication uptime and sensor accuracy. |
| Telecom Power Feeds | Consumer Appliance Control Boards |
|
Use Scenario: Input-stage protection for PoE-powered remote units (e.g., IP cameras, access points) subjected to lightning-induced surges on 48 V DC feeds. IC Role / Device Role / Timing Role: Primary TVS on DC input rail, coordinated with upstream fuse and secondary filtering to absorb 600 W transient energy without degradation. Use Value: Enables single-device 600 W surge handling per line - reduces BOM count versus stacked or hybrid TVS solutions while meeting UL 497B protector classification. |
Use Scenario: Overvoltage protection for microcontroller I/O pins connected to push-button interfaces, display backlights, and relay coils in washing machines and HVAC controllers. IC Role / Device Role / Timing Role: Localized TVS mounted directly at connector or switch node to suppress ESD (IEC 61000-4-2 ±8 kV contact) and coil flyback spikes. Use Value: Achieves <1.0 µA leakage at 14 V - avoids false triggering or battery drain in always-on standby circuits while responding in sub-nanosecond time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14CAHE3_A/I | Same electrical specs and SMB package; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Approved for commercial/industrial use only; not certified for automotive underhood or chassis locations. | Select when halogen-free content is not mandated and automotive qualification is unnecessary. |
| SMAJ14CAHM3_A/I | Same VWM, VBR, VC; lower PPPM = 400 W; smaller SMA (DO-214AC) package (4.5 mm × 2.7 mm). | Lower surge capacity suits cost-sensitive consumer electronics with less severe threat profiles (e.g., USB ports, audio jacks). | Choose for space-constrained layouts where 400 W rating suffices and footprint reduction is prioritized over 600 W headroom. |
Compared with SMBJ14CAHM3_A/I, the HE3 variant trades halogen-free construction and AEC-Q101 qualification for lower cost in non-automotive settings, while the SMAJ14CAHM3_A/I reduces surge rating and footprint - making the SMBJ14CAHM3_A/I optimal for high-reliability, high-energy industrial and automotive applications requiring full 600 W capability and automotive-grade validation.
Availability
SMBJ14CAHM3_A/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power feed applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMBJ14CAHM3_A/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, TVS devices, and power MOSFETs with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness, AEC-Q101 compliance, and precise clamping performance are critical.
FAQ
What is the clamping voltage of SMBJ14CAHM3_A/I at its rated peak pulse current?
The SMBJ14CAHM3_A/I has a maximum clamping voltage (VC) of 23.2 V at its rated peak pulse current (IPPM) of 25.9 A, measured under the standardized 10/1000 µs double-exponential surge waveform. This value is guaranteed per Vishay's datasheet revision 09-Jan-2024 and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The SMBJ14CAHM3_A/I maintains this clamping performance bidirectionally.
Is SMBJ14CAHM3_A/I suitable for automotive applications?
Yes, SMBJ14CAHM3_A/I is AEC-Q101 qualified, confirming its suitability for automotive applications including body control modules, infotainment power supplies, and sensor interfaces. The HM3 suffix denotes halogen-free, RoHS-compliant construction and qualification to AEC-Q101 Rev D stress tests - including temperature cycling, high-temperature reverse bias, and surge endurance. This makes SMBJ14CAHM3_A/I appropriate for under-hood and chassis-mounted systems where reliability under thermal and electrical stress is mandatory.
How does SMBJ14CAHM3_A/I differ from unidirectional SMBJ14A variants?
The SMBJ14CAHM3_A/I is bidirectional, providing symmetrical clamping for both positive and negative transients, whereas unidirectional SMBJ14A types conduct only in reverse bias and require correct polarity placement. SMBJ14CAHM3_A/I has no cathode band marking and exhibits identical VBR, VC, and IPPM in either direction - simplifying layout for AC-coupled lines, differential buses, or floating grounds. Its VWM remains 14 V, matching the unidirectional version's standoff rating.
What is the thermal resistance of SMBJ14CAHM3_A/I, and how does it affect PCB layout?
SMBJ14CAHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W, measured on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe operation below 150 °C junction temperature, PCB layout must provide adequate copper area and avoid excessive trace length between the SMBJ14CAHM3_A/I and ground/power planes. No heatsink is required for single-pulse events, but repetitive surges demand attention to average power dissipation.
Does SMBJ14CAHM3_A/I meet any safety certifications?
Yes, SMBJ14CAHM3_A/I carries Underwriters Laboratories (UL) recognition under file number E136766 for both unidirectional and bidirectional TVS diodes, compliant with UL 497B for signal circuit protectors. It also meets MSL Level 1 per J-STD-020 with a maximum reflow peak temperature of 260 °C, ensuring compatibility with standard lead-free assembly processes. These certifications validate its use in safety-critical and regulated end equipment such as industrial PLCs and automotive ECUs.
SMBJ14CAHM3_A/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:
- 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:
- 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_A/I FAQ
1.How can I place an order for SMBJ14CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14CAHM3_A/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 SMBJ14CAHM3_A/I reliable?
The price and inventory of SMBJ14CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ14CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ14CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14CAHM3_A/I?
SMBJ14CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14CAHM3_A/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 SMBJ14CAHM3_A/I?
For technical support, including SMBJ14CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14CAHM3_A/I requirements.
6.How does Aetrix verify that SMBJ14CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ14CAHM3_A/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 SMBJ14CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ14CAHM3_A/I?
All SMBJ14CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14CAHM3_A/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 SMBJ14CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMBJ14CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ14CAHM3_A/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
