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Vishay General Semiconductor - Diodes Division SMB8J14CAHE3_B/H
- Part No.:
- SMB8J14CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J14CAHE3_B/H.pdf
- Description:
- 800W,14V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,637
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Product details
Overview
SMB8J14CAHE3_B/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 standoff voltage (VWM), 23.2 V maximum clamping voltage (VC) at 34.5 A peak pulse current (IPPM), 800 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMB8J14CAHE3_B/H datasheet, SMB8J14CAHE3_B/H pinout, SMB8J14CAHE3_B/H application, or SMB8J14CAHE3_B/H equivalent, key selection criteria include bidirectional clamping performance under 10/1000 µs transients, low leakage (<1.0 µA at VWM), thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within picoseconds to transient overvoltages induced by inductive switching or ESD events. Its glass-passivated junction ensures stable breakdown behavior, while the bidirectional configuration enables symmetrical clamping on AC-coupled or differential signal paths without polarity sensitivity.
The device complies with ANSI/IEEE C62.35 surge standards and is rated for operation from −55 °C to +150 °C. Its MSL Level 1 rating (peak reflow ≤260 °C) and matte tin-plated leads support robust lead-free assembly, and AEC-Q101 qualification confirms reliability for automotive powertrain and body electronics applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 15.6 V / 17.2 V - Breakdown occurs within this range at 1.0 mA test current |
| VC @ IPPM | 23.2 V - Clamps transients to ≤23.2 V when subjected to 34.5 A (10/1000 µs) |
| PPPM | 800 W - Peak surge power handling capability under standard waveform |
| IPPM | 34.5 A - Maximum non-repetitive surge current it can safely divert |
| ID @ VWM | <1.0 µA - Extremely low leakage ensures minimal loading on protected circuits |
| TJ max | +150 °C - Enables use in under-hood automotive environments and industrial enclosures |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetric dual-terminal construction with cathode band omitted per bidirectional design.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Either terminal serves as input/output; bidirectional conduction allows clamping of ± transients without orientation constraints |
| Case (exposed metal pad) | Thermal conduction path | Not electrically connected; provides mechanical mounting and heat dissipation to PCB copper area (0.2" × 0.2") |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per JESD22 |
| Low incremental surge resistance | Enables tighter clamping (VC − VBR = ~6.0 V) and higher energy absorption efficiency |
| MSL Level 1, 260 °C peak reflow | Supports single-pass lead-free reflow without popcorn or delamination risk |
| Glass passivated junction | Ensures stable VBR tolerance and long-term parameter stability under thermal/humidity stress |
| RoHS-compliant & halogen-free option | HE3 suffix denotes RoHS compliance; HM3 variant adds halogen-free molding compound for stringent environmental programs |
Applications
| Automotive CAN Bus Protection | Industrial Sensor Signal Lines |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L differential pair against load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed across differential bus, absorbing surges before they reach transceiver inputs. Use Value: Maintains signal integrity during 800 W transients while adding <1.0 µA leakage-no impact on bus bias or timing margins. | Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA, 0–10 V) of pressure/temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical) parallel clamp on sensor output line, triggered only during overvoltage events. Use Value: Prevents sensor IC damage from inductive kickback without distorting DC accuracy or bandwidth due to negligible leakage and stable VWM. |
| USB 2.0 Data Line Protection | DC Power Input Stage (12 V Rail) |
Use Scenario: ESD and surge protection for D+/D− lines in automotive infotainment USB ports. IC Role / Device Role / Timing Role: Bidirectional TVS placed between data lines and ground, meeting IEC 61000-4-2 Level 4 (±15 kV air) requirements. Use Value: Clamps ESD events to <23.2 V within <1 ns, preserving signal rise/fall times and preventing receiver latch-up. | Use Scenario: Primary surge suppression on 12 V supply input to ADAS camera modules or lighting controllers. IC Role / Device Role / Timing Role: First-line shunt protector downstream of fuse, clamping load dump spikes before LDO or DC/DC converter inputs. Use Value: Handles 34.5 A surges (per 10/1000 µs) with 23.2 V clamping-keeps downstream ICs below absolute maximum ratings during battery disconnect events. |
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/H | Same VWM/VC, but lower PPPM (600 W vs. 800 W) and IPPM (24.3 A vs. 34.5 A) | Less suitable for high-energy automotive load dump; adequate for ESD-only zones | Select SMB8J14CAHE3_B/H when 800 W surge margin is required per ISO 7637-2 Pulse 5a |
| SMAJ14CAHE3_A/H | Same VWM/VC, but SMB package offers 33 % higher PPPM than SMA's 400 W rating | SMA package limits thermal dissipation in sustained surge scenarios | Choose SMB8J14CAHE3_B/H for improved thermal performance and higher surge endurance in space-constrained layouts |
Compared with SMBJ14CAHE3_A/H and SMAJ14CAHE3_A/H, SMB8J14CAHE3_B/H delivers superior surge energy handling (800 W) and lower thermal resistance (72 °C/W), making it optimal for automotive front-end protection where both peak power and junction temperature control are critical.
Availability
SMB8J14CAHE3_B/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and USB peripheral protection requiring stable component supply, AEC-Q101 compliance, and high-power transient immunity.
Supply support for SMB8J14CAHE3_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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMB8J series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-energy, bidirectional surge suppression in automotive and industrial environments where AEC-Q101 validation and stable clamping under repeated stress are mandatory.
FAQ
What is the clamping voltage of SMB8J14CAHE3_B/H at its rated peak pulse current?
The SMB8J14CAHE3_B/H clamps to a maximum of 23.2 V when subjected to its rated peak pulse current of 34.5 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's Document Number 88422, ensuring predictable overvoltage limiting for downstream ICs in automotive and industrial designs.
Is SMB8J14CAHE3_B/H suitable for automotive applications?
Yes, SMB8J14CAHE3_B/H is AEC-Q101 qualified and explicitly designated for automotive use via its HE3 suffix and "automotive ordering code" designation in Vishay's documentation. It meets requirements for under-hood and body electronics, including thermal cycling, humidity testing, and surge immunity per ISO 7637-2, making it appropriate for CAN, LIN, sensor, and power rail protection in vehicles.
How does the SMB8J14CAHE3_B/H differ from unidirectional variants like SMB10J14AHE3_B/H?
SMB8J14CAHE3_B/H is bidirectional with symmetrical clamping for AC or differential signals, whereas SMB10J14AHE3_B/H is unidirectional and requires correct polarity orientation. The bidirectional version has identical VWM (14 V) and VC (23.2 V) but lower PPPM (800 W vs. 1000 W) and no forward surge rating (IFSM), reflecting its role in balanced transient suppression rather than DC line protection.
What is the maximum operating temperature for SMB8J14CAHE3_B/H?
The SMB8J14CAHE3_B/H has a maximum junction temperature (TJ) of +150 °C and an operating junction/storage temperature range of −55 °C to +150 °C. This rating is validated per AEC-Q101 and supports deployment in engine control units, ADAS modules, and industrial drives where ambient temperatures exceed 105 °C.
Does SMB8J14CAHE3_B/H require orientation during PCB placement?
No, SMB8J14CAHE3_B/H does not require orientation during placement because it is a bidirectional TVS diode with no polarity marking-unlike unidirectional types that feature a cathode band. Its symmetric DO-214AA (SMB) package allows automated pick-and-place without alignment verification, reducing assembly complexity and error risk in high-volume automotive manufacturing.
SMB8J14CAHE3_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:
- 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)
SMB8J14CAHE3_B/H FAQ
1.How can I place an order for SMB8J14CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J14CAHE3_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 SMB8J14CAHE3_B/H reliable?
The price and inventory of SMB8J14CAHE3_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 SMB8J14CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMB8J14CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J14CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J14CAHE3_B/H?
SMB8J14CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J14CAHE3_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 SMB8J14CAHE3_B/H?
For technical support, including SMB8J14CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J14CAHE3_B/H requirements.
6.How does Aetrix verify that SMB8J14CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMB8J14CAHE3_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 SMB8J14CAHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMB8J14CAHE3_B/H?
All SMB8J14CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J14CAHE3_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 SMB8J14CAHE3_B/H part is unused and in its original packaging.
Return procedure for SMB8J14CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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