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Vishay General Semiconductor - Diodes Division SMB8J7.5C-E3/52
- Part No.:
- SMB8J7.5C-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.5C-E3/52.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMB8J7.5C-E3/52 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for clamping fast-rising ESD and surge transients on signal/power lines. It features 7.5 V stand-off voltage (VWM), 12.9 V maximum clamping voltage (VC) at 200 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform. Used in automotive sensor interfaces and industrial I/O protection where bidirectional overvoltage immunity is required.
For engineers reviewing the SMB8J7.5C-E3/52 datasheet, SMB8J7.5C-E3/52 pinout, SMB8J7.5C-E3/52 application, or SMB8J7.5C-E3/52 equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM = 1.72), RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This bi-directional TVS diode operates symmetrically across both polarities, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 µA at VWM), while the low incremental surge resistance supports effective energy diversion during 8.3 ms surges and repetitive transients.
The device meets J-STD-020 MSL Level 1 (peak reflow 260 °C), has thermal resistance RθJA = 72 °C/W, and is qualified to AEC-Q101 for automotive under-hood and chassis applications. Its 12.9 V clamping voltage at 200 A IPPM provides predictable overvoltage limiting under standardized 10/1000 µs surge conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before conduction begins; defines safe signal swing range. |
| VBR min/max | 8.33 V / 9.21 V at IT = 1.0 mA - Confirmed breakdown threshold window ensuring reliable turn-on margin above VWM. |
| VC @ IPPM | 12.9 V at 200 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPPM | 800 W - Peak pulse power handling capacity; validates robustness against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | <1.0 µA - Reverse leakage at rated stand-off voltage; ensures minimal signal loading and power loss. |
| TJ max | 150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| Package | DO-214AA (SMB) - Standard surface-mount outline with 2.16 mm height and 3.94 mm body length; compatible with IPC-7351B footprint. |
Pinout & Package
DO-214AA (SMB) package: bi-directional device with no polarity marking; symmetrical two-terminal construction. Cathode band absent - terminals are functionally identical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (both) | Surge current path | Bi-directional conduction path - either terminal serves as anode or cathode depending on transient polarity; no PCB orientation dependency. |
| Case | Thermal interface | Plastic molded case with UL 94 V-0 rating; requires 5.0 mm × 5.0 mm copper pad per terminal for rated PPPM derating per Fig. 2. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and infotainment I/O - supports PPAP documentation and long-term reliability requirements. |
| Bi-directional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded sensor outputs without external polarity management. |
| Low clamping ratio (VC/VWM) | 1.72 - Minimizes overvoltage overshoot relative to working voltage, reducing risk of latch-up or damage in 3.3 V/5 V logic interfaces. |
| MSL Level 1 | Compatible with standard lead-free reflow profiles up to 260 °C peak; eliminates pre-baking requirement for high-volume SMT assembly. |
| RoHS-compliant terminations | Matte tin plating meeting J-STD-002 solderability and JESD22-B102 wetting standards; Class 1A whisker resistance per JESD201. |
Applications
| Automotive Sensor Interface | Industrial RS-485 Bus |
|---|---|
|
Use Scenario: Protecting analog output lines of pressure/temperature sensors in engine control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed between sensor output and microcontroller ADC input. Use Value: Limits transient voltage to ≤12.9 V during 200 A surges, preserving ADC integrity and preventing system reset without adding series impedance. |
Use Scenario: Guarding half-duplex RS-485 transceivers in factory automation PLCs subjected to cable-induced lightning surges. IC Role / Device Role / Timing Role: Line-to-line and line-to-ground TVS on A/B differential pair and common-mode reference. Use Value: Maintains signal integrity by clamping common-mode transients within 12.9 V while supporting >500 kbps data rates due to low junction capacitance. |
| Consumer USB Port Protection | Medical Patient Monitor I/O |
|
Use Scenario: Safeguarding USB 2.0 D+/D− lines in portable medical devices against ESD events per IEC 61000-4-2 ±15 kV contact discharge. IC Role / Device Role / Timing Role: Bi-directional TVS placed directly at USB connector, before ESD filter or transceiver. Use Value: Responds in <1 ps to divert >30 A ESD current, holding line voltage below 12.9 V to prevent PHY latch-up or data corruption. |
Use Scenario: Shielding analog front-end inputs (ECG, SpO₂) in bedside monitors from electrostatic discharge during clinical handling. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) bi-directional clamp on isolated sensor inputs referenced to patient ground. Use Value: Ensures signal fidelity with sub-nA bias current impact while meeting IEC 60601-1-2 ESD immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CA | Same VWM (7.5 V), VC = 12.9 V, but rated for 600 W PPPM (vs. 800 W); lower IPPM = 150 A. | Not AEC-Q101 qualified; intended for commercial-grade consumer/industrial use only. | Select when automotive qualification is unnecessary and cost sensitivity outweighs 25% lower surge margin. |
| SMCJ7.5CA | Same VWM and VC, but DO-214AB (SMC) package; higher PPPM = 1500 W, IPPM = 300 A. | Larger footprint (7.11 mm × 6.22 mm vs. 3.94 mm × 2.18 mm); requires revised PCB layout and thermal pad area. | Choose when system-level surge testing exceeds 800 W requirements and board space permits larger package. |
Compared with SMBJ7.5CA and SMCJ7.5CA, SMB8J7.5C-E3/52 uniquely balances AEC-Q101 compliance, 800 W surge rating, and compact DO-214AA footprint - making it optimal for space-constrained automotive modules requiring validated reliability.
Availability
SMB8J7.5C-E3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial communication interfaces, and medical device I/O requiring stable component supply with full traceability and lifecycle continuity.
Supply support for SMB8J7.5C-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, rectifiers, MOSFETs, and protection devices with emphasis on reliability, power density, and automotive qualification.
The SMB8J series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-energy transient suppression in harsh environments - targeting AEC-Q101-compliant automotive, industrial, and medical applications demanding consistent clamping performance.
FAQ
What is the polarity configuration of SMB8J7.5C-E3/52?
SMB8J7.5C-E3/52 is a bi-directional TVS diode with no polarity marking on the DO-214AA (SMB) package. Both terminals are functionally identical, allowing symmetrical clamping of positive and negative transients without regard to orientation on the PCB. This eliminates assembly errors and simplifies layout for AC-coupled or floating signal paths.
Does SMB8J7.5C-E3/52 meet automotive qualification standards?
Yes, SMB8J7.5C-E3/52 is AEC-Q101 qualified, as confirmed in Vishay document 88422 (Revision 12-Nov-12). This qualification covers stress tests including high-temperature operating life, temperature cycling, and ESD, validating its suitability for under-hood and chassis-mounted automotive electronics such as engine control units and ADAS sensor modules.
What is the maximum clamping voltage of SMB8J7.5C-E3/52 under surge conditions?
The maximum clamping voltage (VC) of SMB8J7.5C-E3/52 is 12.9 V at 200 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and represents the upper limit of voltage seen by protected circuitry during worst-case surge events, ensuring compatibility with 3.3 V and 5 V logic interfaces.
How does SMB8J7.5C-E3/52 differ from the SMBJ7.5CA variant?
SMB8J7.5C-E3/52 delivers 800 W peak pulse power (PPPM) and is AEC-Q101 qualified, whereas SMBJ7.5CA offers 600 W PPPM and lacks automotive qualification. Both share identical VWM (7.5 V) and VC (12.9 V), but SMB8J7.5C-E3/52 supports higher surge currents (200 A vs. 150 A) and is specified for extended temperature operation in automotive environments.
What PCB layout guidance applies to SMB8J7.5C-E3/52 for rated performance?
To achieve full 800 W PPPM rating, SMB8J7.5C-E3/52 must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Vishay Figure 2 derating curves. Smaller pads reduce thermal dissipation and require power derating above 25 °C ambient; use internal copper planes and thermal vias to maintain junction temperature ≤150 °C under repeated surge conditions.
SMB8J7.5C-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 14.3V
- Current - Peak Pulse (10/1000µs):
- 55.9A
- 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)
SMB8J7.5C-E3/52 FAQ
1.How can I place an order for SMB8J7.5C-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.5C-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 SMB8J7.5C-E3/52 reliable?
The price and inventory of SMB8J7.5C-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 SMB8J7.5C-E3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J7.5C-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.5C-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.5C-E3/52?
SMB8J7.5C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.5C-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 SMB8J7.5C-E3/52?
For technical support, including SMB8J7.5C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.5C-E3/52 requirements.
6.How does Aetrix verify that SMB8J7.5C-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J7.5C-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 SMB8J7.5C-E3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J7.5C-E3/52?
All SMB8J7.5C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.5C-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 SMB8J7.5C-E3/52 part is unused and in its original packaging.
Return procedure for SMB8J7.5C-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.5C-E3/52 Tags
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Diodes Incorporated
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