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Vishay General Semiconductor - Diodes Division SMBJ14CA-M3/5B
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- Part No.:
- SMBJ14CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14CA-M3/5B.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,386
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Product details
Overview
SMBJ14CA-M3/5B 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 (VC) at 25.9 A peak pulse current (IPPM), and 600 W peak pulse power capability with 10/1000 µs waveform - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ14CA-M3/5B datasheet, SMBJ14CA-M3/5B pinout, SMBJ14CA-M3/5B application, or SMBJ14CA-M3/5B equivalent, key selection criteria include bidirectional surge clamping performance, low leakage (<1.0 µA at VWM), MSL Level 1 moisture sensitivity, halogen-free RoHS compliance, and compatibility with automated SMT placement on PCBs with 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical breakdown (VBR min/max = 15.6 V / 17.2 V at 1.0 mA test current) and clamping behavior in either direction. Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1.0 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients.
The device is rated for continuous operation from −55 °C to +150 °C junction temperature, with thermal resistance of 100 °C/W (junction-to-ambient, on recommended pad layout) and 20 °C/W (junction-to-lead). It meets UL 497B recognition (QVGQ2) and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 14 V - Maximum continuous reverse working voltage before significant conduction begins; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 15.6 V to 17.2 V at 1.0 mA - Confirmed symmetric avalanche onset in both directions; ensures predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | 23.2 V at 25.9 A (10/1000 µs) - Peak voltage seen by protected circuit under full-rated surge; enables robust IC/MOSFET protection |
| IPPM (Peak Pulse Current) | 25.9 A - Maximum non-repetitive surge current it can shunt without failure; validated per Fig. 3 waveform |
| PPPM (Peak Pulse Power) | 600 W - Surge energy handling capacity with 10/1000 µs waveform and 0.01% duty cycle; supports repetitive transient environments |
| ID (Max Reverse Leakage) | ≤1.0 µA at VWM - Negligible standby current draw; avoids loading sensitive analog or low-power signal paths |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with IPC-7351B land patterns |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Cathode Band Absent) | Transient return path (bidirectional) | No defined anode/cathode; terminals are functionally identical - surge current flows symmetrically in either direction |
| Cathode (Cathode Band Absent) | Transient return path (bidirectional) | Identical to Anode terminal; bidirectional operation eliminates polarity dependency during layout or assembly |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) on 12–24 V systems |
| Bidirectional clamping symmetry | Eliminates need for orientation-aware placement; simplifies PCB design and reduces assembly error risk |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free reflow profiles without pre-baking; lowers manufacturing overhead |
| Halogen-free & RoHS-compliant (M3 suffix) | Fulfills environmental compliance for EU, China RoHS, and JEITA standards without derating or substitution |
| UL 497B recognized (QVGQ2) | Validates suitability for telecom and industrial signal-line protection per safety-critical infrastructure requirements |
Applications
| Industrial Sensor Interface Protection | Telecom Line Surge Suppression |
|---|---|
|
Use Scenario: Protecting 4–20 mA current-loop sensors and RS-485 transceivers from inductive kickback and lightning-induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pair or supply rail to divert transient energy to ground. Use Value: Limits induced voltage to ≤23.2 V during 25.9 A transients, preventing damage to ADuM1401 isolators or MAX14841 transceivers. |
Use Scenario: Shielding Ethernet PHYs and POTS line drivers in DSLAMs and VoIP gateways from longitudinal surges up to 4 kV. IC Role / Device Role / Timing Role: Primary-level TVS mounted at connector entry point to absorb common-mode transients before reaching protection ICs. Use Value: Clamps surge voltage within 1 ns, maintaining signal integrity on 100 Ω differential pairs while surviving repeated 600 W pulses. |
| Automotive Body Control Module (BCM) Inputs | Consumer Appliance Motor Driver Protection |
|
Use Scenario: Safeguarding microcontroller GPIOs and LIN bus receivers in BCMs exposed to load-dump and ISO 7637-2 pulse 5a transients. IC Role / Device Role / Timing Role: Secondary-stage TVS on low-voltage sensor inputs (e.g., door latch switches) after primary fuse and choke filtering. Use Value: Withstands 150 °C junction temperature and delivers <1 µA leakage at 14 V, ensuring long-term reliability in under-hood environments. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers connected to MCU-based motor controllers. IC Role / Device Role / Timing Role: Parallel-mounted across motor terminals or H-bridge outputs to clamp inductive flyback voltage. Use Value: Handles 100 A non-repetitive forward surge (IFSM) and maintains stable VC across temperature, preventing MOSFET avalanche failure. |
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-E3/5B | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs M3); uses standard tin-lead compatible plating | Preferred for commercial-grade, non-automotive designs where halogen-free requirement is absent | Select when cost-sensitive production requires broader solder alloy compatibility and no halogen restriction applies |
| SAC14-01G | Lower 400 W PPPM, higher VC = 27 V at 18 A; SOD-123FL package (smaller footprint, lower thermal mass) | Better suited for space-constrained consumer electronics with moderate surge exposure (IEC 61000-4-2 only) | Choose for compact portable devices where 600 W rating is unnecessary and board area is premium |
Compared with SMBJ14CA-E3/5B, the SMBJ14CA-M3/5B adds halogen-free compliance without sacrificing surge rating or thermal performance; versus SAC14-01G, it delivers 50% higher pulse power and tighter clamping - critical for industrial and telecom infrastructure where reliability margins are non-negotiable.
Availability
SMBJ14CA-M3/5B is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, automotive body control modules, and consumer appliance motor driver circuits requiring stable component supply, halogen-free compliance, and repeatable surge immunity performance.
Supply support for SMBJ14CA-M3/5B 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 high-reliability, automotive-qualified, and industry-standard solutions.
The SMBJ series targets board-level transient protection in harsh environments - engineered for consistent clamping, low leakage, and robust surge endurance across automotive, industrial, and telecom applications.
FAQ
What is the clamping voltage of SMBJ14CA-M3/5B at its rated peak pulse current?
The SMBJ14CA-M3/5B 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 Figure 1 in Vishay document 88392 and reflects worst-case voltage seen by downstream components during surge events - critical for validating protection margins of 3.3 V or 5 V logic interfaces.
Is SMBJ14CA-M3/5B suitable for automotive applications?
The SMBJ14CA-M3/5B itself is commercial-grade (M3 suffix), not AEC-Q101 qualified. For automotive use, Vishay offers the HM3 variant (e.g., SMBJ14CAHM3_B/I), which carries AEC-Q101 qualification and extended temperature validation. Engineers must select the HM3 or HE3 suffix versions - not SMBJ14CA-M3/5B - for under-hood or safety-critical vehicle systems.
Does SMBJ14CA-M3/5B require orientation during PCB placement?
No. The SMBJ14CA-M3/5B is a bidirectional TVS diode with no cathode band or polarity marking. Both terminals are functionally identical, allowing unrestricted placement on PCBs - a key advantage over unidirectional variants like SMBJ14A-M3/5B, which require strict cathode alignment.
What is the maximum operating temperature for SMBJ14CA-M3/5B?
The SMBJ14CA-M3/5B has a specified operating junction temperature range of −55 °C to +150 °C. Its thermal resistance (RθJA) is 100 °C/W on the recommended 5.0 mm × 5.0 mm copper pad layout, meaning at 5.0 W steady-state dissipation, junction temperature rises 500 °C above ambient - confirming it is intended for transient-only operation, not continuous power dissipation.
How does the M3 suffix differ from E3 in SMBJ14CA-M3/5B?
The M3 suffix denotes halogen-free, RoHS-compliant construction with matte tin-plated leads meeting JESD201 Class 2 whisker resistance, whereas E3 indicates RoHS-compliance without halogen-free assurance. Both share identical electrical ratings and SMB package dimensions, but SMBJ14CA-M3/5B satisfies stricter environmental mandates such as JEITA EG-750 and certain Tier 1 automotive supplier requirements.
SMBJ14CA-M3/5B 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):
- 15.5V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 25.9A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ14CA-M3/5B FAQ
1.How can I place an order for SMBJ14CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14CA-M3/5B 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 SMBJ14CA-M3/5B reliable?
The price and inventory of SMBJ14CA-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ14CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ14CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14CA-M3/5B?
SMBJ14CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14CA-M3/5B 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 SMBJ14CA-M3/5B?
For technical support, including SMBJ14CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14CA-M3/5B requirements.
6.How does Aetrix verify that SMBJ14CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ14CA-M3/5B 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 SMBJ14CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ14CA-M3/5B?
All SMBJ14CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14CA-M3/5B, 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 SMBJ14CA-M3/5B part is unused and in its original packaging.
Return procedure for SMBJ14CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ14CA-M3/5B Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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