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Vishay General Semiconductor - Diodes Division SMBJ14CAHM3_B/H
- Part No.:
- SMBJ14CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ14CAHM3_B/H.pdf
- Description:
- 600W,14V,5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,110
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Product details
Overview
SMBJ14CAHM3_B/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 or power lines. It features a 14 V stand-off voltage (VWM), 15.6–17.2 V breakdown voltage (VBR) at 1 mA, 23.2 V maximum clamping voltage (VC) at 25.9 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ14CAHM3_B/H datasheet, SMBJ14CAHM3_B/H pinout, SMBJ14CAHM3_B/H application, or SMBJ14CAHM3_B/H equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VBR ≈ 1.48), MSL Level 1 moisture sensitivity, halogen-free RoHS compliance (HM3 suffix), and AEC-Q101 qualification readiness via HM3_X automotive ordering code.
Technical Context
This device operates as a voltage-clamped surge protector with symmetrical avalanche breakdown in both polarities, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ps), while the low incremental surge resistance supports consistent clamping under repetitive 10/1000 µs transients.
The SMBJ14CAHM3_B/H is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W, requiring minimal copper pad area (0.2" × 0.2") for full 600 W rating. It meets UL 497B recognition (QVGQ2) and complies with ANSI/IEEE C62.35 surge standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 15.6 V / 17.2 V at IT = 1 mA - Confirmed bidirectional breakdown range; ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | 23.2 V at 25.9 A - Clamped voltage during 600 W transient; limits stress on downstream components like microcontrollers or transceivers. |
| PPPM | 600 W (10/1000 µs) - Peak surge energy handling capacity; validated per REA-defined waveform with 0.01% duty cycle. |
| ID @ VWM | ≤1.0 µA - Reverse leakage at stand-off voltage; critical for low-power sensor interfaces and battery-backed circuits. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive or high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMB (DO-214AA), molded case with matte tin-plated leads, MSL Level 1 (260 °C peak reflow), UL 94 V-0 flammability rating. Bidirectional construction has no polarity marking; terminals are symmetric anode/cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | Either terminal serves as cathode or anode depending on applied polarity; enables AC line or differential signal protection without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports robust protection against IEC 61000-4-5 surge events up to 4 kV (line-earth) in industrial power supplies. |
| Clamping voltage ≤23.2 V at 25.9 A | Ensures protected ICs (e.g., RS-485 transceivers with 3.3 V or 5 V rails) remain within absolute maximum ratings during surge. |
| Low leakage ≤1.0 µA at 14 V | Minimizes standby current drain in always-on sensor nodes and battery-powered IoT edge devices. |
| Halogen-free, RoHS-compliant (HM3 suffix) | Fulfills environmental compliance requirements for EU, China RoHS, and JEITA-MITI standards without compromising surge performance. |
| AEC-Q101 qualification ready (HM3_B/H) | Base part qualifies for automotive applications when ordered as HM3_X (e.g., HM3_B); supports under-hood ECU and ADAS sensor protection. |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
|
Use Scenario: Protection of gate drivers and current-sense amplifiers against inductive kickback from BLDC motor switching. IC Role / Device Role / Timing Role: Bidirectional TVS placed across motor phase outputs and controller supply rails to clamp flyback spikes. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic interfaces and analog front-ends exposed to >100 V transients. |
Use Scenario: Shielding LIN bus or analog pressure/temperature sensor lines from load-dump and jump-start surges in vehicle cabins. IC Role / Device Role / Timing Role: Standoff-clamp device installed at connector entry point to absorb 12 V system transients up to ±100 V. Use Value: Maintains signal integrity below 23.2 V clamping level, ensuring uninterrupted operation of ASIL-B compliant sensor signal chains. |
| Telecom Power Feeds | Consumer USB-C Port Protection |
|
Use Scenario: Safeguarding PoE (Power over Ethernet) data lines and DC input rails against lightning-induced surges in outdoor base stations. IC Role / Device Role / Timing Role: Primary-level TVS on RJ45 magnetics secondary side and 48 V DC input, coordinated with GDTs. Use Value: Limits induced common-mode voltages to <25 V, preserving PHY IC reliability and meeting IEC 61000-4-5 Level 4 immunity. |
Use Scenario: Protecting USB-C CC, SBU, and VBUS lines from ESD and hot-plug transients in portable docking stations and monitors. IC Role / Device Role / Timing Role: Low-capacitance bidirectional suppressor placed adjacent to connector to shunt ±15 kV HBM ESD pulses. Use Value: Achieves sub-1 ns response with <1.0 µA leakage, avoiding signal distortion on high-speed USB 3.2 Gen 2 differential pairs. |
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 | Same electrical specs, but RoHS-compliant commercial grade (E3) without halogen-free certification or AEC-Q101 path. | Lacks HM3's halogen-free status and automotive qualification readiness; suitable only for non-automotive commercial designs. | Select when halogen-free or automotive qualification is not required and cost optimization is prioritized. |
| SAC14 | Lower 400 W PPPM rating, higher VC = 25.5 V at 18.2 A, same VWM = 14 V; SOD-123FL package (smaller, lower thermal mass). | Reduced surge margin and inferior thermal dissipation; limited to low-energy consumer-grade interfaces. | Choose only for space-constrained PCBs where 600 W rating is unnecessary and layout cannot accommodate SMB footprint. |
Compared with SMBJ14CA-E3/52, SMBJ14CAHM3_B/H adds halogen-free compliance and AEC-Q101 qualification pathway; versus SAC14, it delivers 50% higher surge power, 10% lower clamping voltage, and superior thermal stability in SMB package-critical for industrial and automotive deployments.
Availability
SMBJ14CAHM3_B/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, telecom power feeds, and consumer USB-C port protection requiring stable component supply across production lifecycles.
Supply support for SMBJ14CAHM3_B/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, MOSFETs, and optoelectronics with emphasis on reliability, power efficiency, and ruggedness.
The SMBJ series targets high-energy transient suppression in harsh environments, engineered for industrial automation, automotive electronics, and infrastructure communications where failure resilience is mission-critical.
FAQ
What is the clamping voltage of SMBJ14CAHM3_B/H under a 600 W surge?
The SMBJ14CAHM3_B/H clamps to a maximum of 23.2 V when subjected to its rated 600 W peak pulse (10/1000 µs waveform) at 25.9 A. This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet (Doc #88392, Rev 09-Jan-2024). The low clamping ratio (VC/VBR ≈ 1.48) ensures effective protection of 3.3 V and 5 V ICs without overstressing their I/O structures. SMBJ14CAHM3_B/H maintains this performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBJ14CAHM3_B/H suitable for automotive applications?
SMBJ14CAHM3_B/H uses the HM3 suffix, indicating halogen-free, RoHS-compliant commercial grade with AEC-Q101 qualification readiness-when ordered as HM3_B or HM3_I with revision suffix (e.g., HM3_B/H), it meets AEC-Q101 stress test requirements. It is deployed in automotive sensor interfaces, body control modules, and infotainment systems where bidirectional transient suppression is needed. SMBJ14CAHM3_B/H is not pre-certified out-of-box but follows the qualified HM3_X automotive ordering path defined by Vishay.
How does SMBJ14CAHM3_B/H differ from unidirectional SMBJ14A variants?
SMBJ14CAHM3_B/H is bidirectional with symmetrical VBR (15.6–17.2 V) and no polarity marking, enabling protection of AC signals, differential buses, or floating grounds. In contrast, unidirectional SMBJ14A has a cathode band, conducts forward current up to 100 A (IFSM), and exhibits VF ≤3.5 V at 50 A-but only clamps in reverse. SMBJ14CAHM3_B/H omits forward conduction capability and replaces it with equal clamping in both directions, making it ideal for RS-485, CAN FD, and Ethernet PHY protection where polarity is undefined.
What is the moisture sensitivity level (MSL) of SMBJ14CAHM3_B/H?
SMBJ14CAHM3_B/H meets MSL Level 1 per J-STD-020, with a maximum peak reflow temperature of 260 °C. This means the device can be stored indefinitely at ambient conditions without dry-pack requirements and withstand standard lead-free reflow profiles without popcorn cracking or delamination. The SMB (DO-214AA) molding compound is UL 94 V-0 rated, and terminals are matte tin-plated per J-STD-002 and JESD 22-B102, ensuring robust solderability and whisker resistance (JESD 201 Class 2).
Can SMBJ14CAHM3_B/H replace SMAJ14CA in existing designs?
No-SMBJ14CAHM3_B/H is not a drop-in replacement for SMAJ14CA due to package differences: SMBJ uses DO-214AA (5.59 mm × 4.06 mm), while SMAJ uses DO-214AC (4.57 mm × 2.62 mm). Though both offer 14 V VWM and 600 W PPPM, the larger SMB footprint requires PCB layout modification. Thermal resistance also differs (RθJA = 100 °C/W for SMBJ vs. 130 °C/W for SMAJ), affecting derating above 25 °C. SMBJ14CAHM3_B/H should only replace SMAJ14CA after verifying pad layout, thermal margin, and mechanical clearance.
SMBJ14CAHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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)
SMBJ14CAHM3_B/H FAQ
1.How can I place an order for SMBJ14CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ14CAHM3_B/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_B/H reliable?
The price and inventory of SMBJ14CAHM3_B/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_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ14CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ14CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ14CAHM3_B/H?
SMBJ14CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ14CAHM3_B/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_B/H?
For technical support, including SMBJ14CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ14CAHM3_B/H requirements.
6.How does Aetrix verify that SMBJ14CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ14CAHM3_B/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_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ14CAHM3_B/H?
All SMBJ14CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ14CAHM3_B/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_B/H part is unused and in its original packaging.
Return procedure for SMBJ14CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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