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Vishay General Semiconductor - Diodes Division SMB8J14CAHM3_B/I
- Part No.:
- SMB8J14CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J14CAHM3_B/I.pdf
- Description:
- 800W,14V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,460
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Product details
Overview
SMB8J14CAHM3_B/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 14 V stand-off voltage (VWM), 23.2 V maximum clamping voltage (VC) at 34.5 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - optimized for automotive-grade ESD and load-dump protection in sensor interfaces and power supply rails.
For engineers reviewing the SMB8J14CAHM3_B/I datasheet, SMB8J14CAHM3_B/I pinout, SMB8J14CAHM3_B/I application, or SMB8J14CAHM3_B/I equivalent, key selection criteria include its AEC-Q101 qualification, bidirectional polarity, low clamping ratio (VC/VWM = 1.66), and compatibility with automated SMT assembly on standard 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within <1 ps to transients exceeding its 15.6–17.2 V breakdown range (VBR at 1 mA). Its glass-passivated junction ensures stable leakage (<1 µA at 14 V) and robust surge handling up to 100 A IFSM (unidirectional only; not applicable here due to bidirectional configuration).
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 72 °C/W and RθJL = 20 °C/W, enabling reliable performance in under-hood automotive environments when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 12 V automotive systems. |
| VBR min/max | 15.6 V / 17.2 V at 1 mA - tight breakdown tolerance ensures predictable turn-on during fast transients. |
| VC @ IPPM | 23.2 V at 34.5 A - low clamping voltage limits stress on downstream ICs like CAN transceivers or MCU I/O pins. |
| PPPM | 800 W (10/1000 µs) - sustains high-energy surges typical of ISO 7637-2 Pulse 1/2a/5a without degradation. |
| ID @ VWM | <1 µA - negligible leakage preserves battery life in always-on automotive modules. |
| TJ max | +150 °C - supports operation in engine control units and ADAS sensors exposed to elevated ambient temperatures. |
| AEC-Q101 | Qualified - validated for automotive reliability including temperature cycling, HTRB, and ESD per JESD22-A114. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, MSL Level 1 (260 °C reflow peak). Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); cathode band absent (bidirectional type).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Bidirectional structure allows identical clamping in both polarities - no orientation required during placement. |
| Case (body) | Thermal and mechanical interface | Exposed metal-free plastic body; heat dissipation relies on PCB copper pads (0.2" × 0.2" per terminal recommended). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use including temperature cycling, humidity testing, and surge endurance - eliminates need for additional qualification by Tier 1 suppliers. |
| Low clamping ratio (VC/VWM) | 1.66 - minimizes overvoltage exposure to protected circuitry compared to generic TVS diodes with ratios >2.0. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage under thermal stress and humidity - critical for 15-year vehicle lifetimes. |
| MSL Level 1 rating | Enables standard reflow soldering without baking - reduces manufacturing cost and avoids moisture-related popcorning defects. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets global environmental regulations and OEM material declarations (e.g., Ford WSS-M99P9999-A1, GM GP-10). |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Line Protection |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure, temperature, or position sensors in engine control modules against ISO 7637-2 load dump and inductive switching spikes. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point, clamping surges before reaching precision ADC front-end. Use Value: Maintains signal integrity with sub-µA leakage and 23.2 V clamping - prevents ADC saturation and sensor calibration drift during 100 V/100 ms transients. |
Use Scenario: Safeguarding CAN_H/CAN_L differential pair in factory automation PLCs exposed to motor drive noise and relay coil kickback. IC Role / Device Role / Timing Role: Bidirectional TVS placed across bus lines to clamp common-mode and differential transients while preserving signal rise/fall times. Use Value: 800 W PPPM rating handles repetitive 40 V/100 ms pulses per ISO 11898-2; low capacitance (<100 pF) avoids CAN bit timing distortion. |
| Consumer Power Adapter Input Stage | Telecom DC Power Feed Protection |
|
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters where 12–20 V rails are susceptible to feedback loop faults or Zener failure. IC Role / Device Role / Timing Role: Standoff-limited shunt protector parallel to output capacitor, activated only during fault conditions exceeding 14 V. Use Value: 14 V VWM aligns with 15 V nominal adapter outputs; 23.2 V VC ensures downstream DC-DC converters remain within absolute maximum ratings. |
Use Scenario: Surge protection on -48 V DC telecom power feeds entering remote radio units (RRUs), subject to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role / Timing Role: Primary-stage bidirectional clamp on feed line, coordinated with upstream GDT or MOV for staged energy absorption. Use Value: 800 W rating complements 6 kV/3 kA line surge requirements; AEC-Q101 qualification provides proven field reliability beyond commercial-grade alternatives. |
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 | Unqualified for automotive; commercial-grade (E3 suffix), higher leakage (≤5 µA vs. ≤1 µA), same VWM/VC specs. | Limited to industrial/commercial designs without AEC-Q101 requirement; unsuitable for OEM automotive BOMs. | Select when cost sensitivity outweighs automotive qualification and leakage budget permits. |
| SMCJ14CAHM3_A/H | Same AEC-Q101 and HM3 spec, but larger SMC (DO-214AB) package - 7.11 mm × 6.22 mm vs. SMB's 4.57 mm × 3.94 mm. | Higher 1500 W PPPM rating suits more severe surge environments (e.g., alternator load dump), but requires larger PCB area. | Choose when system-level surge test levels exceed 800 W and board space allows SMC footprint. |
Compared with SMBJ14CA-E3/52, SMB8J14CAHM3_B/I delivers tighter leakage control and automotive qualification without sacrificing clamping performance; versus SMCJ14CAHM3_A/H, it trades 70% smaller footprint for 47% lower peak power rating - ideal for space-constrained ECUs where 800 W meets ISO 7637-2 Pulse 5a requirements.
Availability
SMB8J14CAHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN networks, consumer power adapters, and telecom DC feed applications requiring stable component supply, AEC-Q101 compliance, and consistent TVS performance across production batches.
Supply support for SMB8J14CAHM3_B/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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMB8J series belongs to Vishay's TRANSZORB® automotive TVS family, engineered specifically for robust transient suppression in harsh environments - targeting ECU, ADAS, and body electronics where failure is not an option.
FAQ
What is the clamping voltage of SMB8J14CAHM3_B/I at its rated peak pulse current?
The SMB8J14CAHM3_B/I has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current (IPPM) of 34.5 A using the 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures downstream components see limited overvoltage during surge events - critical for protecting 3.3 V or 5 V logic interfaces powered from 12 V rails.
Is SMB8J14CAHM3_B/I suitable for bidirectional signal line protection?
Yes, SMB8J14CAHM3_B/I is a bidirectional TVS diode, meaning it provides symmetrical clamping for both positive and negative transients. Its lack of polarity marking and matched VBR/VWM characteristics make it ideal for protecting differential buses like CAN, RS-485, or USB D+/D− lines where voltage excursions occur in either direction - unlike unidirectional variants such as SMB10J14A.
Does SMB8J14CAHM3_B/I meet automotive qualification standards?
Yes, SMB8J14CAHM3_B/I is AEC-Q101 qualified, as confirmed by Vishay's documentation (Document Number: 88422, Revision: 09-Jan-2024). The HM3 suffix denotes halogen-free, RoHS-compliant construction with full automotive reliability testing - including temperature cycling, highly accelerated life testing (HALT), and surge endurance - making it approved for use in engine control, chassis, and safety-critical modules.
What is the maximum operating temperature for SMB8J14CAHM3_B/I?
The SMB8J14CAHM3_B/I has a maximum junction temperature (TJ max) of +150 °C and an operating junction/storage temperature range of -55 °C to +150 °C. This wide range supports deployment in under-hood automotive locations and industrial enclosures where ambient temperatures exceed 105 °C - provided PCB thermal design follows Vishay's recommended 0.2" × 0.2" copper pad layout to maintain RθJA ≤ 72 °C/W.
How does the HM3 suffix in SMB8J14CAHM3_B/I affect its compliance status?
The HM3 suffix in SMB8J14CAHM3_B/I indicates halogen-free, RoHS-compliant construction that also satisfies AEC-Q101 qualification. Unlike E3 (commercial RoHS) or HE3 (automotive RoHS without halogen restriction), HM3 meets strict OEM material declarations - including Ford WSS-M99P9999-A1 and GM GP-10 - while maintaining the same electrical specs and thermal performance as non-HM3 variants.
SMB8J14CAHM3_B/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 14V
- Current - Peak Pulse (10/1000µs):
- 34.5A
- Power - Peak Pulse:
- 800W
- 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)
SMB8J14CAHM3_B/I FAQ
1.How can I place an order for SMB8J14CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J14CAHM3_B/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 SMB8J14CAHM3_B/I reliable?
The price and inventory of SMB8J14CAHM3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J14CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMB8J14CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J14CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J14CAHM3_B/I?
SMB8J14CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J14CAHM3_B/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 SMB8J14CAHM3_B/I?
For technical support, including SMB8J14CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J14CAHM3_B/I requirements.
6.How does Aetrix verify that SMB8J14CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMB8J14CAHM3_B/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 SMB8J14CAHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMB8J14CAHM3_B/I?
All SMB8J14CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J14CAHM3_B/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 SMB8J14CAHM3_B/I part is unused and in its original packaging.
Return procedure for SMB8J14CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J14CAHM3_B/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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