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Vishay General Semiconductor - Diodes Division SMB8J14CAHM3_A/H
- Part No.:
- SMB8J14CAHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J14CAHM3_A/H.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,332
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Product details
Overview
SMB8J14CAHM3_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), 15.6–17.2 V breakdown voltage (VBR), 23.2 V clamping voltage (VC) at 34.5 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - used to safeguard automotive sensor interfaces and industrial I/O circuits against ESD and load dump transients.
For engineers reviewing the SMB8J14CAHM3_A/H datasheet, SMB8J14CAHM3_A/H pinout, SMB8J14CAHM3_A/H application, or SMB8J14CAHM3_A/H equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance (HM3 suffix), and compatibility with automated SMT placement on PCBs requiring robust transient immunity per ISO 7637-2 and IEC 61000-4-5.
Technical Context
This device operates as a voltage-clamped crowbar during overvoltage events, leveraging an avalanche breakdown mechanism to divert surge current away from protected circuitry. Its bidirectional symmetry enables protection of AC-coupled or differential signal paths without polarity constraints.
Thermal performance is defined by RθJA = 72 °C/W and RθJL = 20 °C/W, supporting operation up to +150 °C junction temperature. It meets MSL Level 1 per J-STD-020 and passes JESD201 Class 2 whisker testing, confirming suitability for high-reliability reflow assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range for protected line |
| VBR min/max | 15.6 V / 17.2 V at 1 mA - guaranteed avalanche initiation window; ensures consistent turn-on across production lots |
| VC @ IPPM | 23.2 V at 34.5 A - clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs |
| PPPM | 800 W - peak pulse power handling with 10/1000 µs waveform; quantifies single-event surge energy absorption capacity |
| ID @ VWM | 1.0 µA - reverse leakage at stand-off voltage; low value minimizes quiescent power loss and signal distortion |
| TJ max | +150 °C - maximum junction temperature; enables deployment in under-hood automotive and industrial environments |
| Qualification | AEC-Q101 qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals allow orientation-agnostic placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (both ends) | Surge current path | Identical bidirectional terminals; either end connects to protected line, other to ground or reference plane |
| Case | Thermal conduction path | Plastic body with internal copper lead frame; requires minimum 5.0 mm × 5.0 mm copper pad per terminal for rated PPPM |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating signal lines without external polarity management circuitry |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and infotainment interfaces |
| Halogen-free & RoHS-compliant (HM3) | Meets global environmental regulations and supports lead-free reflow profiles up to 260 °C peak |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 10605 ESD pulses), improving system-level immunity |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking, reducing manufacturing overhead |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
|
Use Scenario: Protecting LIN or SENT bus lines in engine temperature or pressure sensors exposed to load dump and jump-start transients. IC Role / Device Role: Bidirectional TVS placed between signal line and chassis ground to clamp ±200 V surges. Use Value: Maintains signal integrity below 23.2 V clamping threshold while surviving 800 W pulses - preventing microcontroller reset or ADC saturation. |
Use Scenario: Safeguarding CANH/CANL differential pair in factory automation PLCs subjected to inductive switching noise. IC Role / Device Role: Dual-channel TVS (one per line) referenced to common ground, absorbing common-mode surges up to 1 kV. Use Value: 1.0 µA leakage at 14 V avoids bus bias shift; bidirectional symmetry ensures equal protection regardless of transient polarity. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
|
Use Scenario: Shielding USB 2.0 D+/D− lines in smart home hubs from human-body-model (HBM) ESD events. IC Role / Device Role: Low-capacitance TVS array (paired devices) shunting ESD current before it reaches USB transceiver. Use Value: 23.2 V clamping prevents damage to 3.3 V tolerant PHY; AEC-Q101 grade ensures long-term reliability beyond consumer requirements. |
Use Scenario: Front-end protection of ADSL/VDSL line drivers interfacing with outside plant wiring prone to lightning-induced surges. IC Role / Device Role: Primary surge limiter mounted at board edge, coordinated with GDT or MOV secondary protection. Use Value: 800 W PPPM handles multiple 10/1000 µs surges per IEC 61000-4-5 Level 4; SMB footprint allows dense layout near RJ-11 connector. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J14CAHE3_A/H | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs HM3) | Lacks halogen-free certification; acceptable for non-automotive commercial use | Select when halogen-free requirement is not mandated and cost optimization is prioritized |
| SMAJ14CA | Lower PPPM (400 W), larger SMA package (DO-214AC), higher RθJA (95 °C/W) | Not AEC-Q101 qualified; limited to lower-energy surge environments | Choose only for space-constrained designs where SMB footprint is unavailable and 400 W suffices |
Compared with SMB8J14CAHM3_A/H, the HE3 variant trades halogen-free status for slightly lower cost in non-automotive settings, while the SMAJ14CA sacrifices power rating and automotive qualification for legacy package compatibility - neither offers pin-to-pin equivalence, but both serve overlapping protection roles with verified derating margins.
Availability
SMB8J14CAHM3_A/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN networks, telecom line cards, and consumer USB host ports requiring stable component supply with full traceability and lifecycle continuity.
Supply support for SMB8J14CAHM3_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 and application-specific performance.
The SMB8JxxCA series targets high-reliability transient suppression in automotive and industrial systems, engineered to meet stringent AEC-Q101 and IEC/EN surge immunity standards with optimized thermal and surge response characteristics.
FAQ
What is the clamping voltage of SMB8J14CAHM3_A/H at its rated peak pulse current?
The SMB8J14CAHM3_A/H has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current (IPPM) of 34.5 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry will not experience more than 23.2 V during such a surge event - critical for ensuring compatibility with 3.3 V or 5 V logic interfaces downstream of the SMB8J14CAHM3_A/H.
Is SMB8J14CAHM3_A/H suitable for automotive applications?
Yes, SMB8J14CAHM3_A/H is AEC-Q101 qualified and specifically designed for automotive use, including engine control, ADAS sensors, and body electronics. Its halogen-free (HM3) construction, MSL Level 1 rating, and validation across temperature cycling, HTRB, and ESD tests confirm compliance with automotive reliability requirements - making SMB8J14CAHM3_A/H appropriate for under-hood and cabin-mounted systems operating from −40 °C to +125 °C ambient.
How does the bidirectional configuration of SMB8J14CAHM3_A/H affect PCB layout?
The SMB8J14CAHM3_A/H has no polarity marking and identical terminals, enabling orientation-agnostic placement on PCBs - eliminating orientation verification during automated assembly and simplifying layout for differential or AC-coupled signals. Designers must still provide symmetric 5.0 mm × 5.0 mm copper pads per terminal to achieve rated 800 W pulse power, and ensure thermal relief traces do not compromise current-handling capability in the SMB8J14CAHM3_A/H's surge path.
What is the maximum reverse leakage current for SMB8J14CAHM3_A/H at its stand-off voltage?
The SMB8J14CAHM3_A/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at its stand-off voltage (VWM) of 14 V, measured at 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes standby power loss in battery-operated systems - a key differentiator versus higher-leakage alternatives that could cause false triggers or drift in precision analog front-ends using SMB8J14CAHM3_A/H.
Does SMB8J14CAHM3_A/H require special handling during reflow soldering?
No special handling is required: SMB8J14CAHM3_A/H is rated MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C, compatible with standard lead-free soldering profiles. Its matte tin-plated leads comply with J-STD-002 and JESD22-B102, and it passes JESD201 Class 2 whisker testing - meaning SMB8J14CAHM3_A/H can be processed in standard SMT lines without baking, dry pack, or humidity-controlled storage.
SMB8J14CAHM3_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:
- 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_A/H FAQ
1.How can I place an order for SMB8J14CAHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J14CAHM3_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 SMB8J14CAHM3_A/H reliable?
The price and inventory of SMB8J14CAHM3_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 SMB8J14CAHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J14CAHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J14CAHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J14CAHM3_A/H?
SMB8J14CAHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J14CAHM3_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 SMB8J14CAHM3_A/H?
For technical support, including SMB8J14CAHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J14CAHM3_A/H requirements.
6.How does Aetrix verify that SMB8J14CAHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J14CAHM3_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 SMB8J14CAHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J14CAHM3_A/H?
All SMB8J14CAHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J14CAHM3_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 SMB8J14CAHM3_A/H part is unused and in its original packaging.
Return procedure for SMB8J14CAHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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