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Vishay General Semiconductor - Diodes Division SMB8J15CA-E3/52
- Part No.:
- SMB8J15CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J15CA-E3/52.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,765
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Product details
Overview
SMB8J15CA-E3/52 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 15 V stand-off voltage (VWM), 24.4 V maximum clamping voltage (VC) at 32.8 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J15CA-E3/52 datasheet, SMB8J15CA-E3/52 pinout, SMB8J15CA-E3/52 application, or SMB8J15CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low leakage (<1.0 µA at VWM), RoHS-compliant matte tin terminations, 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 conduction 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.
Thermal performance is defined by RθJA = 72 °C/W (typ.) and RθJL = 20 °C/W (typ.), supporting operation from −55 °C to +150 °C junction temperature. It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive use - confirmed by HE3/HM3 suffix variants and automotive ordering codes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 16.7 V / 18.5 V - breakdown voltage range at 1.0 mA test current; ensures reliable turn-on within tight tolerance. |
| VC @ IPPM | 24.4 V at 32.8 A - clamping voltage during 10/1000 µs surge; limits downstream voltage stress to safe levels. |
| PPPM | 800 W - peak pulse power handling with 10/1000 µs waveform; supports high-energy ESD and load-dump events. |
| ID @ VWM | <1.0 µA - ultra-low reverse leakage at stand-off voltage; minimizes standby power loss and signal distortion. |
| TJ max. | +150 °C - maximum junction temperature; enables deployment in under-hood automotive and industrial environments. |
| Package | SMB (DO-214AA) - surface-mount package with 5.59 mm × 4.06 mm footprint; compatible with standard reflow profiles and J-STD-002 solderability. |
Pinout & Package
Two-terminal bidirectional device in SMB (DO-214AA) package; no polarity marking - symmetrical construction allows either terminal to serve as anode or cathode depending on transient polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (1) | Surge current entry point (bidirectional) | Either terminal accepts transient energy; clamps symmetrically across both polarities without external biasing. |
| Anode/Cathode (2) | Surge current return path (bidirectional) | Completes low-impedance path to ground or reference rail during overvoltage events; no dedicated GND pin required. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces per stress test requirements. |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and low leakage under thermal cycling and humidity exposure. |
| MSL Level 1 rating | Supports unlimited floor life and standard reflow soldering up to 260 °C peak without preconditioning. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes voltage overshoot during surge events - critical for protecting 3.3 V and 5 V logic-level interfaces. |
| Matte tin plated leads | Complies with J-STD-002 and JESD22-B102; eliminates whisker risk (JESD201 Class 2) and ensures solder joint reliability. |
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 ISO 7637-2 load dump and ISO 10605 ESD pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and chassis ground to shunt surge energy before reaching sensitive interface ICs. Use Value: Maintains signal integrity during 800 W transients while holding clamped voltage below 24.4 V - safeguarding 3.3 V/5 V receivers compliant with IEC 61000-4-2/4-4/4-5. |
Use Scenario: Guarding digital input modules in programmable logic controllers against field-wiring induced surges and relay contact bounce. IC Role / Device Role / Timing Role: Parallel-connected TVS on each 24 V DC input channel to limit transient voltage before optocoupler or Schmitt trigger input stage. Use Value: Withstands repeated 10/1000 µs surges up to 32.8 A while exhibiting <1.0 µA leakage - preserving input threshold accuracy and reducing false triggering. |
| Consumer USB Port Protection | Telecom Line Interface Protection |
|
Use Scenario: Safeguarding USB 2.0 data lines (D+/D−) and VBUS against ESD and hot-plug transients in portable docking stations and peripherals. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp placed directly at connector to divert fast transients before USB transceiver IC. Use Value: Clamps to 24.4 V within nanoseconds while adding negligible capacitance - preserving signal rise/fall times and maintaining USB 2.0 eye diagram compliance. |
Use Scenario: Protecting Ethernet PHY interfaces and analog telephone line cards from lightning-induced surges and AC power cross-talk. IC Role / Device Role / Timing Role: Primary surge suppression stage on tip/ring lines upstream of isolation transformers and line drivers. Use Value: Handles 800 W peak power with symmetrical clamping - enabling robust protection for both POTS and VoIP front-end circuits without polarity concerns. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA-E3/52 | Unidirectional variant with same VWM (15 V) but higher PPPM (1000 W); lacks symmetrical clamping. | Requires explicit polarity alignment; unsuitable for AC-coupled or floating signal lines. | Select only when unidirectional surge direction is guaranteed and higher power margin is needed. |
| SMCJ15CA-E3/52 | Larger SMC (DO-214AB) package; same electrical specs but higher thermal mass (RθJA = 35 °C/W). | Better sustained surge handling but occupies 2.5× PCB area; incompatible with dense SMB layouts. | Choose when board space permits and thermal derating for repeated surges is critical. |
Compared with SMBJ15CA-E3/52 and SMCJ15CA-E3/52, SMB8J15CA-E3/52 delivers optimal balance of bidirectional protection, compact SMB footprint, and AEC-Q101 qualification - making it the preferred choice for space-constrained automotive and industrial signal-line protection where polarity-agnostic clamping is required.
Availability
SMB8J15CA-E3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, consumer USB port protection, and telecom line interface designs requiring stable component supply and full traceability.
Supply support for SMB8J15CA-E3/52 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 diodes, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
SMB8J15CA-E3/52 belongs to Vishay's TRANSZORB® family of high-power-density TVS diodes engineered specifically for robust transient suppression in harsh electromagnetic environments - targeting automotive, industrial, and communications infrastructure.
FAQ
What is the clamping voltage of SMB8J15CA-E3/52 at its rated peak pulse current?
The SMB8J15CA-E3/52 has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current (IPPM) of 32.8 A with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 standards and ensures downstream circuitry remains within safe operating voltage limits during surge events. The SMB8J15CA-E3/52 maintains this clamping performance across its full operating temperature range of −55 °C to +150 °C.
Is SMB8J15CA-E3/52 suitable for automotive applications?
Yes, SMB8J15CA-E3/52 is AEC-Q101 qualified and explicitly designated for automotive use via its HE3/HM3 suffix variants. It meets stringent stress testing requirements including temperature cycling, humidity bias, and mechanical shock - validated for deployment in engine control units, ADAS sensors, and infotainment interfaces. The SMB8J15CA-E3/52 also complies with MSL Level 1 and J-STD-020 reflow standards for automotive manufacturing.
How does SMB8J15CA-E3/52 differ from unidirectional TVS diodes like SMBJ15CA-E3/52?
SMB8J15CA-E3/52 is bidirectional, providing symmetrical clamping for both positive and negative transients without polarity dependency - ideal for AC-coupled or floating signal lines. In contrast, SMBJ15CA-E3/52 is unidirectional and requires correct cathode orientation relative to ground. While SMBJ15CA-E3/52 offers higher PPPM (1000 W), the SMB8J15CA-E3/52's 800 W rating is sufficient for most bidirectional surge scenarios and eliminates layout errors from misoriented placement.
What is the maximum reverse leakage current for SMB8J15CA-E3/52 at its stand-off voltage?
The SMB8J15CA-E3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 15 V stand-off voltage (VWM), measured at 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and reduces standby power consumption in battery-operated systems. Leakage remains well below 5 µA even at elevated temperatures up to +125 °C, as confirmed by Vishay's thermal derating curves.
Does SMB8J15CA-E3/52 require special PCB layout considerations?
Yes - Vishay specifies mounting on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve rated 800 W pulse power and thermal performance. Use of smaller pads reduces surge current capability and increases junction temperature. The SMB8J15CA-E3/52 also requires symmetric trace routing and avoidance of vias near terminals to maintain low-inductance paths essential for effective transient suppression.
SMB8J15CA-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 32.8A
- Power - Peak Pulse:
- 800W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J15CA-E3/52 FAQ
1.How can I place an order for SMB8J15CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J15CA-E3/52 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 SMB8J15CA-E3/52 reliable?
The price and inventory of SMB8J15CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J15CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J15CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J15CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J15CA-E3/52?
SMB8J15CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J15CA-E3/52 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 SMB8J15CA-E3/52?
For technical support, including SMB8J15CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J15CA-E3/52 requirements.
6.How does Aetrix verify that SMB8J15CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J15CA-E3/52 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 SMB8J15CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J15CA-E3/52?
All SMB8J15CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J15CA-E3/52, 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 SMB8J15CA-E3/52 part is unused and in its original packaging.
Return procedure for SMB8J15CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J15CA-E3/52 Tags
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