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Vishay General Semiconductor - Diodes Division SMB8J14CAHE3_A/H
- Part No.:
- SMB8J14CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J14CAHE3_A/H.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,475
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Product details
Overview
SMB8J14CAHE3_A/H 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 sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J14CAHE3_A/H datasheet, SMB8J14CAHE3_A/H pinout, SMB8J14CAHE3_A/H application, or SMB8J14CAHE3_A/H equivalent, key selection criteria include AEC-Q101 qualification, bidirectional clamping symmetry, low leakage (<1.0 µA at VWM), thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT placement 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 induced by inductive switching or ESD events. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, while the bidirectional configuration enables symmetric suppression of positive and negative polarity surges without polarity sensitivity.
The device is rated for continuous operation from –55 °C to +150 °C junction temperature and meets MSL Level 1 per J-STD-020 (260 °C peak reflow). Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards and JESD 201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum steady-state reverse voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR (min/max) | 15.6 V / 17.2 V at 1.0 mA - verified breakdown threshold range ensuring consistent turn-on across production lots. |
| VC @ IPPM | 23.2 V at 34.5 A - clamping voltage under 10/1000 µs surge; limits downstream IC stress to safe levels during 800 W transient events. |
| PPPM | 800 W - peak pulse power handling capability with standardized 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 compliance when properly mounted. |
| ID @ VWM | <1.0 µA - ultra-low reverse leakage at stand-off voltage, minimizing standby power loss in battery-powered sensor nodes. |
| TJ max. | +150 °C - maximum junction temperature rating enabling use in under-hood automotive environments and high-ambient industrial enclosures. |
| Package | SMB (DO-214AA) - surface-mount outline with 5.59 mm × 3.94 mm footprint; compatible with standard pick-and-place equipment and IPC-7351B land patterns. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads. Polarity: bidirectional - no cathode marking; symmetrical terminal function.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient shunt path | Either terminal serves as input/output; bidirectional conduction allows single-device protection of AC-coupled or floating lines without orientation constraints. |
| Case (body) | Thermal and mechanical interface | Non-electrical; provides mechanical anchoring and contributes to thermal dissipation via PCB copper pad contact (0.2" × 0.2" recommended). |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS sensor, and infotainment subsystems. |
| Glass passivated junction | Ensures stable VBR over time and temperature; eliminates risk of junction degradation under repeated surge stress or humidity exposure. |
| MSL Level 1 rating | Enables single-pass reflow at 260 °C peak without moisture-induced popcorning - eliminates pre-bake requirement in high-volume SMT lines. |
| Low clamping ratio (VC/VBR ≈ 1.43) | Indicates high surge energy absorption efficiency; minimizes voltage overshoot relative to breakdown, protecting sensitive 3.3 V or 5 V logic interfaces. |
| UL 94 V-0 molding compound | Self-extinguishing encapsulant meets flammability safety requirements for industrial and transportation equipment enclosures. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt clamping element placed directly at connector entry point to divert surge energy before reaching protected ICs. Use Value: Withstands 800 W transients while clamping to 23.2 V - safely limits stress on 24 V-rated transceivers and preserves signal integrity during 12 V system faults. |
Use Scenario: Safeguarding digital input modules in programmable logic controllers against field-wiring transients from relay coil switching or motor drive noise. IC Role / Device Role / Timing Role: Primary front-end surge limiter on dry-contact or 24 V DC input channels, placed upstream of optocouplers or level shifters. Use Value: Low 1.0 µA leakage prevents false triggering of high-impedance inputs; bidirectional symmetry accommodates AC-coupled or floating field wiring configurations. |
| Consumer Power Adapter Interface | Telecom Line Card Surge Suppression |
|
Use Scenario: Input-stage protection for USB-C PD adapters and wall-mounted chargers exposed to mains-borne surges and ESD during plug insertion. IC Role / Device Role / Timing Role: First-line defense between AC/DC rectifier output and primary-side controller IC, absorbing fast-rising line transients. Use Value: 72 °C/W thermal resistance enables effective self-cooling on compact PCBs; RoHS-compliant HE3 suffix satisfies global regulatory requirements for consumer electronics. |
Use Scenario: Secondary-side protection on Ethernet PHY interfaces and analog telephone line cards subjected to lightning-induced surges per ITU-T K.20/K.44. IC Role / Device Role / Timing Role: Bidirectional clamp across differential pairs or tip/ring lines, providing symmetrical suppression without polarity dependency. Use Value: 23.2 V clamping voltage aligns with 24 V telecom power rails; SMB footprint allows dense placement near RJ-45 connectors without sacrificing board area. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J14CAHM3_A/H | Halogen-free variant with identical electrical specs and AEC-Q101 qualification; same SMB package and thermal performance. | No functional difference; selected where halogen-free compliance is mandated by OEM or regional environmental regulations (e.g., EU ELV Directive). | Choose SMB8J14CAHM3_A/H when halogen-free material content is required; otherwise SMB8J14CAHE3_A/H offers standard RoHS compliance at lower cost. |
| SMAJ14CAHE3_A/H | Lower PPPM (400 W vs. 800 W); same VWM (14 V), VC (23.2 V), and SMB-equivalent SMA (DO-214AC) package with smaller 4.57 mm × 2.92 mm footprint. | Not suitable for high-energy automotive or industrial transients; limited to consumer-grade or low-risk signal-line protection where space is constrained. | Choose SMAJ14CAHE3_A/H only if board space is critical and surge threat level is ≤400 W; SMB8J14CAHE3_A/H remains preferred for robust AEC-Q101 applications. |
Compared with SMB8J14CAHM3_A/H, the SMB8J14CAHE3_A/H offers identical protection performance with standard RoHS compliance; compared with SMAJ14CAHE3_A/H, it delivers double the surge power handling in a slightly larger but thermally superior SMB package - making it the optimal choice for mission-critical automotive and industrial deployments.
Availability
SMB8J14CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O terminals, and telecom line card designs requiring stable component supply, AEC-Q101 qualification, and high-reliability transient suppression.
Supply support for SMB8J14CAHE3_A/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power density, and application-specific optimization.
The SMB8JxxCAHE3 series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-power-density, AEC-Q101-compliant surge protection in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J14CAHE3_A/H under maximum surge conditions?
The SMB8J14CAHE3_A/H exhibits a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current of 34.5 A using the standard 10/1000 µs waveform. This value is measured at the device terminals under defined test conditions per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream circuitry. The SMB8J14CAHE3_A/H maintains this clamping performance across its full operating temperature range.
Is SMB8J14CAHE3_A/H suitable for automotive applications?
Yes, SMB8J14CAHE3_A/H is explicitly AEC-Q101 qualified and designated for automotive use with the "HE3" suffix indicating RoHS-compliant, AEC-Q101-qualified construction. It is validated for temperature cycling, highly accelerated life testing, and ESD robustness per automotive reliability standards. The SMB8J14CAHE3_A/H is commonly deployed in engine control units, body electronics, and ADAS sensor interfaces where sustained operation up to +150 °C and immunity to load-dump transients are required.
What does the "CA" in SMB8J14CAHE3_A/H signify?
The "CA" suffix in SMB8J14CAHE3_A/H denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions without polarity dependence. Unlike unidirectional variants (e.g., SMB8J14AHE3_A/H), the SMB8J14CAHE3_A/H has no cathode marking and functions identically regardless of terminal orientation, simplifying layout and eliminating assembly errors in AC-coupled or floating signal paths.
How does SMB8J14CAHE3_A/H compare to SMB10J14CAHE3_A/H?
The SMB8J14CAHE3_A/H and SMB10J14CAHE3_A/H share identical electrical parameters (VWM = 14 V, VC = 23.2 V, VBR = 15.6–17.2 V) and AEC-Q101 qualification, but differ in peak pulse power rating: SMB8J14CAHE3_A/H is rated for 800 W, while SMB10J14CAHE3_A/H supports 1000 W. Both use the SMB (DO-214AA) package, but the SMB10J variant achieves higher power handling via internal construction optimizations. The SMB8J14CAHE3_A/H remains ideal for applications where 800 W protection suffices and cost or inventory consolidation is prioritized.
What PCB layout guidance applies to SMB8J14CAHE3_A/H for optimal thermal and surge performance?
For optimal thermal dissipation and surge current handling, Vishay specifies mounting SMB8J14CAHE3_A/H on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, connected to internal ground/power planes via multiple vias. The SMB8J14CAHE3_A/H should be placed as close as possible to the protected interface (e.g., connector or IC pin), with short, wide traces to minimize inductance. Avoid routing sensitive signals beneath the SMB8J14CAHE3_A/H body to prevent coupling.
SMB8J14CAHE3_A/H 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/H FAQ
1.How can I place an order for SMB8J14CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J14CAHE3_A/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 SMB8J14CAHE3_A/H reliable?
The price and inventory of SMB8J14CAHE3_A/H 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/H is usually 5 days.
3.What payment methods are accepted for SMB8J14CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J14CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J14CAHE3_A/H?
SMB8J14CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J14CAHE3_A/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 SMB8J14CAHE3_A/H?
For technical support, including SMB8J14CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J14CAHE3_A/H requirements.
6.How does Aetrix verify that SMB8J14CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J14CAHE3_A/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 SMB8J14CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J14CAHE3_A/H?
All SMB8J14CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J14CAHE3_A/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 SMB8J14CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMB8J14CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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