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Vishay General Semiconductor - Diodes Division SMB8J14CAHE3_A/I
- Part No.:
- SMB8J14CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J14CAHE3_A/I.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,449
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Product details
Overview
SMB8J14CAHE3_A/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 - suitable for automotive sensor interface and industrial I/O line protection.
For engineers reviewing the SMB8J14CAHE3_A/I datasheet, SMB8J14CAHE3_A/I pinout, SMB8J14CAHE3_A/I application, or SMB8J14CAHE3_A/I equivalent, key selection criteria include AEC-Q101 qualification, bidirectional polarity, low clamping ratio (VC/VWM ≈ 1.66), and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode employs a glass-passivated silicon junction optimized for fast response (<1 ps) to ESD and lightning-induced transients. Its bidirectional architecture enables symmetrical clamping above ±14 V without polarity sensitivity, making it ideal for AC-coupled or differential bus lines like CAN FD, LIN, or analog sensor inputs.
The device operates across -55 °C to +150 °C junction temperature range and meets MSL Level 1 per J-STD-020 (260 °C reflow peak). Its 72 °C/W junction-to-ambient thermal resistance requires minimum 0.2" × 0.2" copper pad layout for rated 800 W dissipation under standard test conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 12 V automotive systems. |
| VBR min/max | 15.6 V / 17.2 V at 1 mA - breakdown threshold range ensures reliable turn-on during overvoltage events while avoiding false triggering. |
| VC @ IPPM | 23.2 V at 34.5 A - clamping voltage limits downstream IC stress during 800 W transient; clamping ratio = 1.66 supports robust system-level immunity. |
| PPPM | 800 W (10/1000 µs) - energy-handling capacity sufficient for ISO 7637-2 Pulse 1/2a/3a and IEC 61000-4-5 Level 3 surges. |
| ID @ VWM | 1.0 µA - ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and battery-powered nodes. |
| TJ max | +150 °C - enables deployment in under-hood automotive environments and thermally constrained industrial enclosures. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical two-terminal construction with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals serve as interchangeable surge current entry/exit points; no cathode band or polarity identification required. |
| Case (body) | Thermal and mechanical interface | Plastic molded case provides UL 94 V-0 flammability rating and transfers heat to PCB copper pads via bottom surface contact. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and body electronics with full stress-test compliance. |
| Low clamping voltage (23.2 V) | Protects 16 V-rated downstream components (e.g., CAN transceivers, op-amps) during 12 V system surges without over-clamping. |
| 800 W peak pulse power | Handles repetitive ISO 7637-2 Pulse 5a (load dump) events up to 100 ms duration when mounted on recommended 5.0 mm × 5.0 mm pads. |
| MSL Level 1 rating | Enables single-pass reflow at 260 °C peak without moisture-induced popcorn failure - eliminates pre-bake requirement for production lines. |
| Glass-passivated junction | Ensures stable VBR and low leakage over lifetime, even under thermal cycling and humidity exposure in harsh industrial environments. |
Applications
| Automotive Sensor Interface | Industrial Analog I/O Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and temperature/pressure sensors in engine bay modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS clamp limiting transient excursions to ≤23.2 V during ISO 7637-2 Pulse 5a (12 V system). Use Value: Prevents latch-up or gate oxide damage in 16 V-tolerant sensor signal conditioning ICs while maintaining <1 µA leakage at 14 V nominal. |
Use Scenario: Shielding 4–20 mA current loop inputs on PLC analog input cards from field wiring surges and ESD. IC Role / Device Role / Timing Role: Fast-response (sub-nanosecond) voltage clamp absorbing 800 W transients without affecting loop accuracy or zero-point stability. Use Value: Enables >100,000 surge cycles with no parameter drift due to glass-passivated junction and AEC-Q101 stress validation. |
| Consumer USB Port Protection | Telecom Line Interface |
|
Use Scenario: Safeguarding USB 2.0 D+/D− lines in portable medical devices against contact ESD (±15 kV air, ±8 kV contact). IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp (typ. <100 pF at 0 V) preserving signal rise/fall times while meeting IEC 61000-4-2 Level 4. Use Value: Maintains USB 2.0 eye diagram integrity with <0.5 dB insertion loss at 480 MHz and no data corruption during repeated ESD events. |
Use Scenario: Protecting RS-485 transceiver inputs in outdoor telecom base stations subjected to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Symmetrical clamping on differential pair (A/B) with matched VC to prevent skew-induced timing errors. Use Value: Supports IEC 61000-4-5 4 kV line-earth surge immunity without requiring external series impedance or common-mode chokes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14CAHE3_A/I | Same SMB package and 14 V VWM, but lower PPPM (600 W vs. 800 W) and higher VC (25.4 V vs. 23.2 V); unidirectional variant not applicable. | Limited to lower-energy transients (e.g., IEC 61000-4-2 only); insufficient for ISO 7637-2 Pulse 5a in 12 V systems. | Select SMB8J14CAHE3_A/I when 800 W surge handling and tighter clamping are required for automotive or industrial mains-connected equipment. |
| SMCJ14CAHE3_A/I | Same electrical specs but larger SMC (DO-214AB) package; 1.5× higher thermal mass and RθJA = 35 °C/W vs. 72 °C/W. | Better sustained power handling but incompatible with dense layouts; requires larger PCB area and different stencil design. | Choose SMB8J14CAHE3_A/I for space-constrained designs where SMB footprint and automated placement compatibility are critical. |
Compared with SMBJ14CAHE3_A/I and SMCJ14CAHE3_A/I, SMB8J14CAHE3_A/I delivers optimal balance of high 800 W surge rating, low 23.2 V clamping, and compact SMB footprint - enabling automotive-grade protection without layout or process redesign.
Availability
SMB8J14CAHE3_A/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial analog I/O protection, consumer USB port hardening, and telecom line interface applications requiring stable component supply and AEC-Q101 compliance.
Supply support for SMB8J14CAHE3_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, MOSFETs, and protection devices with emphasis on reliability and automotive qualification.
The SMB8JxxCAHE3 series targets high-reliability transient suppression in automotive and industrial environments, delivering AEC-Q101-qualified TVS performance in the industry-standard SMB footprint.
FAQ
What is the clamping voltage of SMB8J14CAHE3_A/I at its rated peak pulse current?
The SMB8J14CAHE3_A/I has a maximum clamping voltage (VC) of 23.2 V at 34.5 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's Document Number 88422, ensuring predictable overvoltage limiting for downstream 16 V-tolerant ICs in the SMB8J14CAHE3_A/I application circuit.
Is SMB8J14CAHE3_A/I suitable for automotive applications?
Yes, SMB8J14CAHE3_A/I is AEC-Q101 qualified and specifically designed for automotive use, including engine control units, ADAS sensors, and body electronics. Its qualification covers HTOL, temperature cycling, and ESD testing - all verified per Vishay's internal automotive stress protocols and documented in the SMB8J14CAHE3_A/I datasheet revision 09-Jan-2024.
What is the standoff voltage (VWM) and why does it matter for SMB8J14CAHE3_A/I?
The SMB8J14CAHE3_A/I has a 14 V standoff voltage (VWM), meaning it remains non-conductive below this reverse voltage level. This allows safe operation in 12 V automotive systems with margin for ripple and transients, while ensuring rapid clamping onset above 14 V - a critical parameter for protecting sensitive receivers without false triggering in the SMB8J14CAHE3_A/I design context.
Does SMB8J14CAHE3_A/I have polarity markings on the package?
No, SMB8J14CAHE3_A/I is a bidirectional TVS diode and carries no polarity marking such as a cathode band. Its symmetrical DO-214AA (SMB) package allows orientation-agnostic placement on PCBs - simplifying automated assembly and eliminating risk of reverse installation in the SMB8J14CAHE3_A/I production flow.
What is the peak pulse power rating of SMB8J14CAHE3_A/I and how is it tested?
The SMB8J14CAHE3_A/I is rated for 800 W peak pulse power (PPPM) using the standardized 10/1000 µs double-exponential current waveform defined by R.E.A. and ANSI/IEEE C62.35. This rating assumes mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay's SMB8J14CAHE3_A/I datasheet Figure 2 and thermal derating curves.
SMB8J14CAHE3_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):
- 34.5A
- Power - Peak Pulse:
- 800W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J14CAHE3_A/I FAQ
1.How can I place an order for SMB8J14CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J14CAHE3_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 SMB8J14CAHE3_A/I reliable?
The price and inventory of SMB8J14CAHE3_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 SMB8J14CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J14CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J14CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J14CAHE3_A/I?
SMB8J14CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J14CAHE3_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 SMB8J14CAHE3_A/I?
For technical support, including SMB8J14CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J14CAHE3_A/I requirements.
6.How does Aetrix verify that SMB8J14CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J14CAHE3_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 SMB8J14CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J14CAHE3_A/I?
All SMB8J14CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J14CAHE3_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 SMB8J14CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMB8J14CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J14CAHE3_A/I Tags
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