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Vishay General Semiconductor - Diodes Division SMB8J7.5CHE3/52
- Part No.:
- SMB8J7.5CHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.5CHE3/52.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,042
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Product details
Overview
SMB8J7.5CHE3/52 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), 8.33–9.21 V breakdown voltage (VBR) at 1.0 mA, 12.9 V 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 in automotive sensor interface protection.
For engineers reviewing the SMB8J7.5CHE3/52 datasheet, SMB8J7.5CHE3/52 pinout, SMB8J7.5CHE3/52 application, or SMB8J7.5CHE3/52 equivalent, key selection criteria include bi-directional clamping capability, AEC-Q101 qualification, 12.9 V VC under 200 A surge, RoHS-compliant HE3 termination, and DO-214AA thermal performance (RθJA = 72 °C/W).
Technical Context
This bi-directional TVS diode operates symmetrically across both polarities, enabling robust protection against ESD, lightning-induced transients, and inductive switching spikes without polarity sensitivity. Its glass-passivated junction ensures stable VBR tolerance and low leakage (≤1.0 µA at VWM), while the low incremental surge resistance supports fast clamping response within nanoseconds.
The device is rated for -55 °C to +150 °C operating junction temperature and meets MSL Level 1 per J-STD-020 (260 °C peak reflow). Its 72 °C/W junction-to-ambient thermal resistance requires minimum 5.0 mm × 5.0 mm copper pad layout per terminal to sustain 800 W peak pulse power dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum reverse working voltage before clamping begins; defines safe operating margin for 5 V–12 V signal/power rails. |
| VBR min/max | 8.33 V / 9.21 V at IT = 1.0 mA - tight breakdown window ensures predictable turn-on during transients. |
| VC @ IPPM | 12.9 V at IPPM = 200 A (10/1000 µs) - clamping voltage limits downstream IC stress during worst-case surge events. |
| PPPM | 800 W - peak pulse power handling capacity determines survivability against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | ≤1.0 µA - ultra-low reverse leakage preserves signal integrity and battery life in always-on circuits. |
| TJ max | 150 °C - enables use in under-hood automotive environments and industrial enclosures without derating. |
| Package | DO-214AA (SMB) - surface-mount footprint compatible with automated placement; 7.2 mm × 6.2 mm body with cathode band marking. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with two terminals; no polarity marking for bi-directional types - symmetrical operation eliminates cathode/anode orientation constraints during PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional surge path | Both terminals function identically; connects across protected line and ground (or between differential lines) without polarity dependency. |
| Case | Non-conductive housing | UL 94 V-0 rated molding compound prevents flame propagation; no thermal or electrical connection to die. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for engine control, ADAS, and body electronics. |
| Glass passivated junction | Ensures long-term VBR stability and low parameter drift over lifetime, critical for safety-critical surge protection functions. |
| MSL Level 1 rating | Supports lead-free reflow up to 260 °C peak without popcorn failure - eliminates pre-bake requirements in high-volume SMT lines. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage exposure to protected ICs - e.g., 12.9 V clamp limits stress on 12 V-rated CAN transceivers or LIN bus drivers. |
| Matte tin-plated leads | Guarantees solderability per J-STD-002 and whisker resistance per JESD 201 Class 2 - ensures joint integrity in vibration-prone automotive assemblies. |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
Use Scenario: Protecting analog outputs of pressure, temperature, and position sensors connected to ECU inputs. IC Role / Device Role / Timing Role: Bi-directional TVS placed across sensor signal line and chassis ground to shunt ESD and load-dump energy. Use Value: Prevents latch-up or permanent damage to 12-bit ADC front-ends during ISO 10605 ±8 kV contact discharge events. |
Use Scenario: Safeguarding CANH/CANL differential pair in factory automation controllers exposed to motor drive noise. IC Role / Device Role / Timing Role: Paired SMB8J7.5CHE3/52 devices (one per line) referenced to common ground to clamp common-mode surges. Use Value: Maintains CAN signal integrity under IEC 61000-4-5 4 kV surge by limiting differential voltage swing to ≤12.9 V. |
| Consumer USB Port ESD Protection | Telecom DSL Line Surge Suppression |
Use Scenario: Secondary-level ESD protection on USB 2.0 D+/D− lines behind primary polymer TVS. IC Role / Device Role / Timing Role: Fast-response bi-directional clamp absorbing CDM and HBM discharges before reaching USB PHY. Use Value: Reduces system-level ESD failure rate by clamping transients to <13 V within <1 ns - below USB 2.0 receiver absolute max rating. |
Use Scenario: Protecting ADSL/VDSL line drivers and receivers from lightning-induced surges on twisted-pair telecom lines. IC Role / Device Role / Timing Role: Installed between line transformer secondary and codec IC to absorb longitudinal mode surges. Use Value: Withstands 10/1000 µs 800 W surges per ITU-T K.21 Basic Level 3, preserving DSL sync stability after repeated strikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J7.5CA | Same electrical specs (VWM = 7.5 V, VC = 12.9 V, PPPM = 800 W), but commercial-grade (E3 suffix), not AEC-Q101 qualified. | Lacks automotive qualification; suitable for consumer/industrial designs where AEC-Q101 is not mandated. | Select SMB8J7.5CA only if automotive reliability testing and extended temperature validation are unnecessary. |
| SMCJ7.5CA | Same VWM and bi-directional function, but larger DO-214AB (SMC) package; higher PPPM = 1500 W, lower RθJA = 35 °C/W. | Requires larger PCB area; better suited for high-power industrial surge events exceeding 800 W. | Choose SMCJ7.5CA when surge energy exceeds SMB8J7.5CHE3/52's 800 W rating or when thermal budget demands lower junction rise. |
Compared with SMB8J7.5CA, SMB8J7.5CHE3/52 adds AEC-Q101 qualification and JESD 201 Class 2 whisker resistance; compared with SMCJ7.5CA, it trades 700 W extra pulse power for 40% smaller footprint and tighter board space constraints.
Availability
SMB8J7.5CHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial CAN bus nodes, consumer USB ports, and telecom DSL line protection requiring stable component supply and full AEC-Q101 compliance.
Supply support for SMB8J7.5CHE3/52 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, efficiency, and automotive-grade validation.
The SMB8J series belongs to Vishay's TRANSZORB® family of high-power-density TVS diodes, engineered specifically for AEC-Q101-compliant transient suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J7.5CHE3/52 at its rated peak pulse current?
The SMB8J7.5CHE3/52 has a maximum clamping voltage (VC) of 12.9 V when subjected to a 10/1000 µs waveform peak pulse current (IPPM) of 200 A. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMB8J7.5CHE3/52 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMB8J7.5CHE3/52 suitable for automotive applications?
Yes, SMB8J7.5CHE3/52 is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood and body electronics. Its construction includes glass-passivated junctions, matte tin-plated leads meeting JESD 201 Class 2 whisker resistance, and MSL Level 1 reflow compatibility - all validated per automotive reliability standards. The SMB8J7.5CHE3/52 is commonly deployed in engine control modules, ADAS camera interfaces, and infotainment system I/O protection.
What does the "HE3/52" suffix indicate in SMB8J7.5CHE3/52?
The "HE3" suffix denotes RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance; "52" specifies packaging in 7″ diameter plastic tape and reel with 750 units per reel. This ordering code ensures traceable, automotive-grade material with verified process controls - distinct from commercial-grade "E3/52" variants lacking AEC-Q101 validation. The SMB8J7.5CHE3/52 thus guarantees consistent performance in high-reliability production environments.
How does SMB8J7.5CHE3/52 differ from uni-directional SMB10J7.5AHE3/52?
SMB8J7.5CHE3/52 is bi-directional with symmetrical clamping for AC or differential signals, while SMB10J7.5AHE3/52 is uni-directional and conducts only in reverse bias. The SMB8J7.5CHE3/52 has lower peak pulse power (800 W vs. 1000 W) and lower IPPM (200 A vs. 77.5 A at same VC), reflecting its dual-path design. Both share DO-214AA packaging and AEC-Q101 qualification, but SMB8J7.5CHE3/52 is selected when polarity-agnostic protection is required - such as on RS-485, CAN, or audio lines.
What PCB layout guidance applies to SMB8J7.5CHE3/52 for optimal thermal performance?
To sustain full 800 W peak pulse power, SMB8J7.5CHE3/52 must be mounted on minimum 5.0 mm × 5.0 mm copper pads per terminal, as specified in Vishay Document 88422. Smaller pads increase thermal resistance beyond the rated 72 °C/W, risking junction overheating and parametric shift during repeated surges. Use internal ground planes and thermal vias beneath pads where possible. Avoid narrow traces - maintain ≥0.5 mm trace width between SMB8J7.5CHE3/52 and protected ICs to minimize inductance and preserve clamping speed.
SMB8J7.5CHE3/52 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J7.5CHE3/52 FAQ
1.How can I place an order for SMB8J7.5CHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.5CHE3/52 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 SMB8J7.5CHE3/52 reliable?
The price and inventory of SMB8J7.5CHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J7.5CHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J7.5CHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.5CHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.5CHE3/52?
SMB8J7.5CHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.5CHE3/52 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 SMB8J7.5CHE3/52?
For technical support, including SMB8J7.5CHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.5CHE3/52 requirements.
6.How does Aetrix verify that SMB8J7.5CHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J7.5CHE3/52 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 SMB8J7.5CHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J7.5CHE3/52?
All SMB8J7.5CHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.5CHE3/52, 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 SMB8J7.5CHE3/52 part is unused and in its original packaging.
Return procedure for SMB8J7.5CHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.5CHE3/52 Tags
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