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Vishay General Semiconductor - Diodes Division SMB8J14CAHE3/52
- Part No.:
- SMB8J14CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J14CAHE3/52.pdf
- Description:
- TVS DIODE 14VWM 23.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,704
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Product details
Overview
SMB8J14CAHE3/52 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 protection per AEC-Q101.
For engineers reviewing the SMB8J14CAHE3/52 datasheet, SMB8J14CAHE3/52 pinout, SMB8J14CAHE3/52 application, or SMB8J14CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1.0 µA max reverse leakage at VWM, thermal resistance (RθJL = 20 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamping protector using an avalanche breakdown mechanism, with symmetrical bidirectional behavior enabling suppression of both positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance under repetitive surge stress.
Designed for compliance with ANSI/IEEE C62.35, it delivers fast response time (<1 ns), supports surge currents up to 34.5 A (10/1000 µs), and maintains operation across -55 °C to +150 °C junction temperature range - validated for automotive-grade reliability per AEC-Q101.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin. |
| VBR min/max | 15.6 V / 17.2 V at 1.0 mA - guaranteed breakdown voltage window ensuring consistent turn-on threshold across production lots. |
| VC @ IPPM | 23.2 V at 34.5 A - clamping voltage during full-rated surge; determines protected circuit's maximum transient exposure level. |
| PPPM | 800 W (10/1000 µs) - peak surge power handling capacity; defines energy absorption capability for lightning or ESD events. |
| ID @ VWM | 1.0 µA - ultra-low reverse leakage at stand-off voltage; minimizes standby power loss and avoids false triggering. |
| TJ max | +150 °C - maximum junction temperature rating; enables use in under-hood automotive environments with minimal derating. |
| RθJL | 20 °C/W - low junction-to-lead thermal resistance; supports efficient heat transfer to PCB copper pads during surge events. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetric terminals enable orientation-agnostic placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping occurs regardless of voltage polarity applied across the device. |
| Case (body) | Thermal and mechanical interface | Plastic molded case transfers heat to PCB copper pads; dimensions (5.59 mm × 3.94 mm × 2.20 mm) match standard SMB footprint for automated assembly. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, ADAS sensors, and infotainment interfaces requiring zero-failure reliability. |
| Glass-passivated junction | Ensures stable VBR over lifetime and temperature; eliminates risk of moisture-induced parameter drift in humid environments. |
| MSL Level 1 (260 °C) | Enables single-reflow soldering without pre-baking; compatible with standard lead-free reflow profiles used in high-volume manufacturing. |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation material prevents flame propagation in safety-critical systems such as EV battery management. |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and JESD 22-B102; eliminates whisker growth risk per JESD 201 Class 2. |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
|
Use Scenario: Protecting LIN/CAN transceiver inputs against load dump and ISO 7637-2 pulse 5a surges in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional clamping TVS placed directly at connector entry point to shunt transients before reaching PHY layer. Use Value: Limits induced voltage to ≤23.2 V during 34.5 A surge, preserving transceiver integrity while maintaining <1.0 µA leakage during normal 12 V bus operation. |
Use Scenario: Safeguarding RS-485 and CAN FD data lines in factory automation PLCs exposed to motor switching noise and ground bounce. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF at 0 V) bidirectional suppressor placed differential-line-to-ground to preserve signal integrity. Use Value: Clamps common-mode surges to 23.2 V without distorting 5 Mbps CAN FD waveforms due to sub-nanosecond response and symmetric VBR matching. |
| Consumer Power Adapter Input | Telecom PoE Port Protection |
|
Use Scenario: Secondary-side overvoltage protection on 5–24 V DC outputs of wall adapters subjected to capacitor discharge events. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between output rail and ground to absorb capacitive energy dumps from downstream loads. Use Value: Withstands 800 W surges while holding leakage below 1.0 µA at 14 V, eliminating standby current penalty and enabling compact 5.6 mm × 3.9 mm layout. |
Use Scenario: Ethernet port-level surge protection on IEEE 802.3af/at powered devices where DC bias must remain undisturbed during lightning-induced transients. IC Role / Device Role / Timing Role: Bidirectional clamp on each twisted pair, referenced to chassis ground, to divert mode-common surges without disrupting 48 V PoE bias. Use Value: Maintains 14 V stand-off during normal operation while clamping 1 kV/0.5 Ω ring wave surges to <23.2 V - verified per IEC 61000-4-5 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ14CAHE3/52 | Same VWM (14 V), VC (23.2 V), and package; rated for 600 W PPPM (vs. 800 W), lower IPPM (27.5 A). | Lower surge rating limits use in high-energy automotive load-dump scenarios but sufficient for consumer-grade I/O protection. | Select when cost optimization is prioritized and peak surge energy remains below 600 W. |
| 1.5KE14CA | Through-hole DO-201 package; same VWM/VC specs but higher RθJA (75 °C/W vs. 20 °C/W); 5.0 W steady-state rating. | Not suitable for dense SMT layouts or high-reliability automotive applications requiring AEC-Q101. | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required. |
Compared with SMBJ14CAHE3/52 and 1.5KE14CA, SMB8J14CAHE3/52 provides 33 % higher peak pulse power (800 W), superior thermal coupling via low RθJL (20 °C/W), and mandatory AEC-Q101 qualification - making it the preferred choice for next-generation automotive and industrial SMT designs demanding robust transient immunity.
Availability
SMB8J14CAHE3/52 is available at Aetrix Electronics and suitable for automotive electronics, industrial communication interfaces, and telecom power-over-Ethernet (PoE) systems requiring stable component supply, AEC-Q101 compliance, and high-energy transient immunity.
Supply support for SMB8J14CAHE3/52 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMB8J series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in space-constrained automotive and industrial PCBs.
FAQ
What is the clamping voltage of SMB8J14CAHE3/52 at its rated peak pulse current?
The SMB8J14CAHE3/52 has a maximum clamping voltage (VC) of 23.2 V when subjected to its rated peak pulse current (IPPM) of 34.5 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that downstream circuitry will not experience voltages exceeding 23.2 V during standardized surge events - a critical parameter for protecting 12 V–24 V automotive ICs and transceivers.
Is SMB8J14CAHE3/52 suitable for automotive applications?
Yes, SMB8J14CAHE3/52 is AEC-Q101 qualified and manufactured with RoHS-compliant, halogen-free materials (HE3 suffix). It operates across -55 °C to +150 °C, meets MSL Level 1 reflow requirements, and is explicitly listed in Vishay's automotive ordering matrix - making SMB8J14CAHE3/52 appropriate for engine control units, ADAS camera modules, and body electronics where reliability under harsh conditions is mandatory.
How does the bidirectional configuration of SMB8J14CAHE3/52 affect its circuit implementation?
The SMB8J14CAHE3/52 has no polarity marking and identical electrical behavior in both directions, allowing placement without orientation constraints on PCBs. This simplifies layout for differential signal lines (e.g., CAN, RS-485) and eliminates risk of incorrect installation - unlike unidirectional TVS diodes that require cathode alignment. Its symmetric VBR (15.6 V min / 17.2 V max) ensures matched clamping for positive and negative transients.
What is the thermal resistance from junction to lead (RθJL) for SMB8J14CAHE3/52, and why does it matter?
The SMB8J14CAHE3/52 has a typical junction-to-lead thermal resistance (RθJL) of 20 °C/W. This low value enables efficient heat transfer from the silicon die directly into the PCB copper pads during surge events - critical for sustaining repeated 800 W pulses without thermal runaway. It also allows tighter thermal design margins compared to alternatives with higher RθJL, such as through-hole TVS diodes.
Does SMB8J14CAHE3/52 meet UL 94 flammability standards?
Yes, the SMB8J14CAHE3/52 uses a molding compound certified to UL 94 V-0 - the highest flammability rating for plastic materials, indicating self-extinguishing behavior within 10 seconds after flame removal with no dripping of flaming particles. This compliance supports use in safety-critical applications including EV battery management systems and industrial control panels where fire risk mitigation is mandated.
SMB8J14CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
SMB8J14CAHE3/52 FAQ
1.How can I place an order for SMB8J14CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J14CAHE3/52 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 SMB8J14CAHE3/52 reliable?
The price and inventory of SMB8J14CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J14CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J14CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J14CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J14CAHE3/52?
SMB8J14CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J14CAHE3/52 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 SMB8J14CAHE3/52?
For technical support, including SMB8J14CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J14CAHE3/52 requirements.
6.How does Aetrix verify that SMB8J14CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J14CAHE3/52 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 SMB8J14CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J14CAHE3/52?
All SMB8J14CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J14CAHE3/52, 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 SMB8J14CAHE3/52 part is unused and in its original packaging.
Return procedure for SMB8J14CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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