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Vishay General Semiconductor - Diodes Division SMB8J7.5CHE3/5B
- Part No.:
- SMB8J7.5CHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.5CHE3/5B.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,353
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Product details
Overview
SMB8J7.5CHE3/5B 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 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 SMB8J7.5CHE3/5B datasheet, SMB8J7.5CHE3/5B pinout, SMB8J7.5CHE3/5B application, or SMB8J7.5CHE3/5B equivalent, key selection criteria include clamping performance under 200 A surge, bi-directional symmetry for AC-coupled lines, AEC-Q101 qualification for automotive use, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector, responding within picoseconds to transients exceeding its 8.33–9.21 V breakdown range (VBR at 1.0 mA). Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and low incremental surge resistance, enabling consistent clamping across repetitive surges.
Thermally, it exhibits RθJA = 72 °C/W and RθJL = 20 °C/W, supporting operation from –55 °C to +150 °C junction temperature. The bi-directional configuration eliminates polarity sensitivity, making it suitable for differential data lines, CAN bus stubs, and bidirectional power rails where reverse-voltage tolerance is required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing margin for protected circuitry. |
| VBR min/max | 8.33 V / 9.21 V at IT = 1.0 mA - Confirmed breakdown threshold range; ensures reliable turn-on without premature conduction. |
| VC @ IPPM | 12.9 V at 200 A - Measured clamping voltage under 10/1000 μs surge; limits downstream voltage stress during worst-case transients. |
| PPPM | 800 W - Peak pulse power handling per 10/1000 μs waveform; quantifies single-event energy absorption capability. |
| ID @ VWM | <1.0 μA - Reverse leakage at rated stand-off; ensures negligible quiescent current draw in battery-powered systems. |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood automotive deployment with thermal derating. |
| Package | DO-214AA (SMB) - Standardized surface-mount outline with 0.220" × 0.155" footprint; compatible with IPC-7351B land patterns. |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, cathode band absent (bi-directional); terminals are symmetrical and non-polarized. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay recommendation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bi-directional surge path | No polarity marking; either terminal serves as anode or cathode depending on transient polarity - enables placement without orientation check. |
| Case | Thermal and mechanical interface | Plastic body provides UL 94 V-0 flammability rating; leadframe acts as primary heat sink path to PCB copper. |
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. |
| Bi-directional symmetry | Identical VBR and VC characteristics in both directions - eliminates need for polarity-aware routing on differential buses like LIN or RS-485 stubs. |
| Low clamping ratio (VC/VWM) | 1.72 - Ratio of 12.9 V clamping to 7.5 V stand-off; indicates efficient voltage limiting with minimal overvoltage margin. |
| MSL Level 1 | Rated for unlimited floor life at ≤30 °C/85 % RH; supports standard reflow without baking - reduces manufacturing overhead. |
| Glass-passivated junction | Stable parametric drift over time and temperature; prevents parameter shift due to moisture ingress or bias stress. |
Applications
| Automotive Sensor Interface | CAN Bus Stub Protection |
|---|---|
Use Scenario: Protecting analog outputs of pressure, temperature, and position sensors in engine bay modules exposed to ISO 7637-2 pulse 1/2a/5a transients. IC Role / Device Role / Timing Role: Shunt TVS placed between signal line and ground, clamping transients before they reach ADC input or op-amp buffer. Use Value: Limits voltage to ≤12.9 V during 200 A surge, preventing latch-up or gate oxide damage in 3.3 V/5 V sensor signal conditioning ICs. |
Use Scenario: Guarding short branch connections (stubs) on high-speed CAN FD networks in vehicle infotainment and gateway ECUs. IC Role / Device Role / Timing Role: Bi-directional clamp across CANH–CANL differential pair, suppressing common-mode noise and ESD without disrupting DC bias. Use Value: Maintains signal integrity by clamping ±12.9 V surges while adding <1 pF junction capacitance - no measurable impact on 5 Mbps CAN FD eye diagram. |
| Industrial PLC Analog Input | Consumer Appliance Motor Control |
Use Scenario: Safeguarding 0–10 V or 4–20 mA analog inputs in programmable logic controllers subjected to field-wiring induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp at terminal block entry point, coordinated with upstream series impedance and downstream filtering. Use Value: Absorbs up to 800 W transient energy without failure, enabling compliance with IEC 61000-4-5 Level 3 (2 kV line-earth) test requirements. |
Use Scenario: Protecting microcontroller GPIOs and gate drivers in washing machine motor inverters from commutation spikes during brushless DC motor switching. IC Role / Device Role / Timing Role: Localized clamp at MCU I/O pin or half-bridge driver enable line, diverting inductive kickback away from logic circuitry. Use Value: Responds in <1 ns to sub-microsecond spikes, limiting voltage to 12.9 V and preventing false resets or MOSFET shoot-through caused by overvoltage. |
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), same DO-214AA package, but rated for 600 W PPPM (vs. 800 W) and 150 A IPPM (vs. 200 A). | Limited to lower-energy transients (e.g., IEC 61000-4-2 ESD only); not recommended for ISO 7637-2 pulse 5a load dump. | Select SMBJ7.5CA only when system-level surge testing confirms 600 W sufficiency and cost optimization is prioritized. |
| SMCJ7.5CA | Same VWM and bi-directionality, but in larger DO-214AB (SMC) package with 1500 W PPPM and 300 A IPPM rating. | Higher power handling supports longer-duration transients (e.g., 100 ms load dump), but requires 30 % larger PCB area and higher thermal mass. | Choose SMCJ7.5CA when protecting high-current power rails or when derated operation at elevated ambient temperatures is required. |
Compared with SMBJ7.5CA, SMB8J7.5CHE3/5B delivers 33 % higher peak power and 33 % higher surge current in identical footprint; versus SMCJ7.5CA, it trades 40 % lower power headroom for 30 % smaller board space and faster assembly throughput.
Availability
SMB8J7.5CHE3/5B is available at Aetrix Electronics and suitable for automotive sensor protection, CAN bus stub hardening, industrial PLC analog input safeguarding, and consumer appliance motor control requiring stable component supply across production lifecycles.
Supply support for SMB8J7.5CHE3/5B 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, 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-power-density, AEC-Q101-compliant transient suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J7.5CHE3/5B under maximum rated surge current?
The SMB8J7.5CHE3/5B has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated 200 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 12-Nov-12, page 3, bi-directional table. The SMB8J7.5CHE3/5B maintains this clamping performance across its full operating temperature range.
Is SMB8J7.5CHE3/5B suitable for automotive applications?
Yes, SMB8J7.5CHE3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including under-hood environments. Its –55 °C to +150 °C operating junction temperature range, MSL Level 1 moisture sensitivity, and validation against temperature cycling and HTRB testing confirm suitability for engine control units, ADAS sensors, and body electronics. The HE3 suffix denotes AEC-Q101 qualification.
How does the bi-directional configuration of SMB8J7.5CHE3/5B affect circuit layout?
The SMB8J7.5CHE3/5B has no polarity marking and identical electrical characteristics in both directions, eliminating orientation constraints during PCB placement. This simplifies layout for differential signals (e.g., CAN, LIN, RS-485) and AC-coupled lines, removes risk of reverse installation, and avoids need for silkscreen polarity indicators - reducing assembly errors and rework in high-volume SMT lines.
What is the thermal resistance of SMB8J7.5CHE3/5B, and how does it impact power dissipation?
The SMB8J7.5CHE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W and junction-to-lead (RθJL) of 20 °C/W, measured on 0.2" × 0.2" copper pads. These values define its steady-state power handling limit: at TA = 25 °C, continuous power dissipation must remain below ~1.2 W to avoid exceeding TJ max = 150 °C. However, its 800 W PPPM rating applies only to transient events ≤1 ms duration.
Does SMB8J7.5CHE3/5B meet RoHS and halogen-free requirements?
Yes, SMB8J7.5CHE3/5B carries the HE3 suffix, indicating RoHS-compliant construction per Directive 2011/65/EU and halogen-free status per JEDEC JS709A. Vishay confirms compliance in document #99912 and #91000. The matte tin-plated leads meet J-STD-002 solderability standards, and the molding compound achieves UL 94 V-0 flammability rating.
SMB8J7.5CHE3/5B 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J7.5CHE3/5B FAQ
1.How can I place an order for SMB8J7.5CHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.5CHE3/5B 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 SMB8J7.5CHE3/5B reliable?
The price and inventory of SMB8J7.5CHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J7.5CHE3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J7.5CHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.5CHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.5CHE3/5B?
SMB8J7.5CHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.5CHE3/5B 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 SMB8J7.5CHE3/5B?
For technical support, including SMB8J7.5CHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.5CHE3/5B requirements.
6.How does Aetrix verify that SMB8J7.5CHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J7.5CHE3/5B 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 SMB8J7.5CHE3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J7.5CHE3/5B?
All SMB8J7.5CHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.5CHE3/5B, 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 SMB8J7.5CHE3/5B part is unused and in its original packaging.
Return procedure for SMB8J7.5CHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.5CHE3/5B Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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