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Vishay General Semiconductor - Diodes Division SMB8J7.5C-E3/5B
- Part No.:
- SMB8J7.5C-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.5C-E3/5B.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,584
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Product details
Overview
SMB8J7.5C-E3/5B from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection on signal and power lines. It features a 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. It is AEC-Q101 qualified and used to protect automotive sensor interfaces against ESD and load-dump transients.
For engineers reviewing the SMB8J7.5C-E3/5B datasheet, SMB8J7.5C-E3/5B pinout, SMB8J7.5C-E3/5B application, or SMB8J7.5C-E3/5B equivalent, key selection criteria include bi-directional clamping capability, low leakage (<1 µA at 7.5 V), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bi-directional TVS diode operates symmetrically across both polarities, enabling robust protection of AC-coupled or differential signal paths without polarity constraints. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance under repetitive surge stress.
The device complies with ANSI/IEEE C62.35 for transient suppression and meets AEC-Q101 stress testing requirements including temperature cycling, HTRB, and ESD (HBM ≥ 8 kV). Thermal resistance is characterized at RθJA = 72 °C/W and RθJL = 20 °C/W, supporting reliable operation up to TJ = 150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 7.5 V - Maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 8.33–9.21 V at 1.0 mA - Confirmed breakdown range ensuring predictable turn-on during overvoltage events. |
| VC (Clamping Voltage) | 12.9 V at IPPM = 200 A - Peak voltage seen by protected circuit during worst-case 10/1000 µs surge; limits stress on downstream ICs. |
| PPPM (Peak Pulse Power) | 800 W - Sustains standardized 10/1000 µs surge energy without failure; enables use in automotive load-dump scenarios. |
| ID (Reverse Leakage) | <1.0 µA at 7.5 V - Negligible standby current; avoids signal distortion or battery drain in always-on systems. |
| TJ max. | 150 °C - Enables deployment in under-hood automotive environments and industrial enclosures with elevated ambient temperatures. |
| Package | DO-214AA (SMB) - Surface-mount outline with 0.220" body length; compatible with standard reflow profiles and J-STD-020 MSL Level 1 handling. |
Pinout & Package
DO-214AA (SMB) package: bi-directional device with no polarity marking; symmetrical terminals suitable for placement across unidirectional or differential lines without orientation dependency.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bi-directional surge conduction path | Either terminal serves as anode or cathode depending on transient polarity; no color band or marking required. |
| Case / Body | Thermal and mechanical interface | Plastic-molded body meets UL 94 V-0; copper pad layout (0.2" × 0.2") required for rated PPPM performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensor modules. |
| Glass-passivated junction | Ensures long-term stability of VBR and low parameter drift across temperature and life cycles. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow without baking; supports high-volume automated assembly. |
| Low clamping ratio (VC/VWM = 1.72) | Minimizes protected circuit overvoltage exposure while maintaining margin above normal operating voltage. |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and whisker resistance per JESD 201 Class 1A (E3 suffix). |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
|
Use Scenario: Protecting LIN or SENT bus lines in door modules and seat position sensors from ISO 7637-2 pulse 1 and pulse 2a transients. IC Role / Device Role: Bi-directional voltage clamp placed between signal line and ground, absorbing negative and positive spikes without DC bias dependency. Use Value: Maintains signal integrity below 12.9 V clamping during 200 A surges, preventing latch-up or damage to 5 V microcontrollers and analog front-ends. |
Use Scenario: Safeguarding CAN transceivers (e.g., TCAN1042) in factory automation PLCs exposed to motor switching noise and cable ESD. IC Role / Device Role: Differential-line TVS mounted across CAN_H/CAN_L pair to suppress common-mode and asymmetrical transients. Use Value: Delivers 800 W peak pulse power handling with <1 µA leakage at 7.5 V, avoiding bus contention or false dominant states. |
| Consumer USB Port Protection | Telecom DSL Line Interface |
|
Use Scenario: Shielding USB 2.0 D+/D− lines in set-top boxes and smart displays from human-body-model (HBM) ESD events. IC Role / Device Role: Low-capacitance bi-directional clamp placed inline with data lines, referenced to ground. Use Value: Clamps 8 kV contact discharge to ≤12.9 V within nanoseconds, preserving signal rise time and eye diagram integrity. |
Use Scenario: Front-end surge protection for ADSL/VDSL line drivers in residential gateways subjected to lightning-induced surges. IC Role / Device Role: Primary protection device bridging tip/ring lines to ground, coordinated with secondary GDT or MOV stages. Use Value: Withstands repeated 10/1000 µs surges up to 200 A while maintaining 7.5 V stand-off for low-noise analog receive paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CA | Same VWM (7.5 V), same DO-214AA package, but rated for 1000 W PPPM (uni-directional only); bi-directional variant not offered in SMBJ series. | Not suitable for AC or differential signal protection; limited to single-polarity DC rails. | Select SMBJ7.5CA only when protecting unidirectional power rails where polarity is fixed and higher 1000 W rating is required. |
| SMCJ7.5CA | Same VWM and bi-directionality, but in larger DO-214AB (SMC) package with 1500 W PPPM rating and lower RθJA (40 °C/W). | Requires larger PCB area and different pad layout; better suited for high-power industrial mains inputs. | Choose SMCJ7.5CA when system-level surge requirements exceed 800 W or thermal management demands lower junction-to-ambient resistance. |
Compared with SMBJ7.5CA and SMCJ7.5CA, SMB8J7.5C-E3/5B uniquely balances 800 W bi-directional surge capability, AEC-Q101 qualification, and compact DO-214AA footprint-making it optimal for space-constrained automotive and industrial signal-line protection where polarity-agnostic clamping is mandatory.
Availability
SMB8J7.5C-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer USB ports, and telecom DSL line interfaces requiring stable component supply, RoHS compliance, and AEC-Q101 assurance.
Supply support for SMB8J7.5C-E3/5B 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, power efficiency, and automotive-grade qualification.
The SMB8J series belongs to Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-density, high-reliability transient suppression in automotive, industrial, and communications infrastructure where bi-directional clamping and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMB8J7.5C-E3/5B at its rated peak pulse current?
The SMB8J7.5C-E3/5B has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated peak pulse current (IPPM) of 200 A using a 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 protected circuits. The SMB8J7.5C-E3/5B maintains this clamping performance across its full operating temperature range.
Is SMB8J7.5C-E3/5B suitable for automotive applications?
Yes, SMB8J7.5C-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS sensor modules. Its construction includes glass-passivated junctions, matte tin-plated leads compliant with JESD 201 Class 1A, and MSL Level 1 handling-meeting stringent automotive manufacturing and field reliability requirements. The SMB8J7.5C-E3/5B datasheet confirms qualification per AEC-Q101 test conditions.
How does the bi-directional nature of SMB8J7.5C-E3/5B affect its circuit placement?
The SMB8J7.5C-E3/5B has no polarity marking and functions identically in either orientation, making it ideal for AC-coupled, differential, or floating signal lines such as CAN_H/CAN_L or USB D+/D−. Unlike uni-directional TVS diodes, it requires no attention to cathode band alignment during placement. This simplifies layout, eliminates orientation errors in automated assembly, and ensures consistent protection regardless of transient polarity-key for SMB8J7.5C-E3/5B deployment in bidirectional communication interfaces.
What is the maximum reverse leakage current for SMB8J7.5C-E3/5B at its stand-off voltage?
The SMB8J7.5C-E3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA at its stand-off voltage (VWM) of 7.5 V and TA = 25 °C, as specified in Vishay's Document Number 88422. This ultra-low leakage preserves signal integrity in high-impedance sensor paths and avoids unnecessary power loss in battery-operated systems. The SMB8J7.5C-E3/5B maintains leakage below 5 µA even at elevated temperatures up to 125 °C.
Does SMB8J7.5C-E3/5B require special PCB layout considerations?
Yes-the SMB8J7.5C-E3/5B must be mounted on minimum recommended copper pads: 0.2" × 0.2" (5.0 mm × 5.0 mm) per terminal, as defined in Vishay's thermal characterization. Deviating from this layout reduces its ability to dissipate surge energy, lowering effective PPPM from 800 W. The SMB8J7.5C-E3/5B also requires short, low-inductance traces to the protected node and ground plane to preserve nanosecond response time and avoid voltage overshoot during fast transients.
SMB8J7.5C-E3/5B 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-E3/5B FAQ
1.How can I place an order for SMB8J7.5C-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.5C-E3/5B 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-E3/5B reliable?
The price and inventory of SMB8J7.5C-E3/5B 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-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J7.5C-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.5C-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.5C-E3/5B?
SMB8J7.5C-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.5C-E3/5B 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-E3/5B?
For technical support, including SMB8J7.5C-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.5C-E3/5B requirements.
6.How does Aetrix verify that SMB8J7.5C-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J7.5C-E3/5B 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-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J7.5C-E3/5B?
All SMB8J7.5C-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.5C-E3/5B, 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-E3/5B part is unused and in its original packaging.
Return procedure for SMB8J7.5C-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.5C-E3/5B Tags
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