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Vishay General Semiconductor - Diodes Division SMB8J7.5CAHE3_A/H
- Part No.:
- SMB8J7.5CAHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.5CAHE3_A/H.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,229
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Product details
Overview
SMB8J7.5CAHE3_A/H 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 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 - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J7.5CAHE3_A/H datasheet, SMB8J7.5CAHE3_A/H pinout, SMB8J7.5CAHE3_A/H application, or SMB8J7.5CAHE3_A/H equivalent, key selection criteria include AEC-Q101 qualification, bidirectional clamping behavior, low leakage (<1 µA at VWM), thermal resistance (RθJA = 72 °C/W), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its bidirectional symmetry enables protection of AC-coupled or differential lines without polarity constraints.
Rated for -55 °C to +150 °C operating junction temperature and qualified per AEC-Q101, SMB8J7.5CAHE3_A/H supports automotive-grade reliability under repetitive surge stress. The SMB package provides MSL Level 1 moisture sensitivity and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 5 V–12 V interface rails. |
| VBR (min/max) | 8.33 V / 9.21 V at 1.0 mA - Breakdown voltage range ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 12.9 V at 200 A (10/1000 µs) - Clamping voltage limits downstream IC stress during 800 W surge events. |
| IPPM | 200 A - Peak surge current capacity validated on 5.0 mm × 5.0 mm copper pads; derates above 25 °C ambient. |
| Leakage (ID) | <1 µA at VWM - Negligible standby power loss and signal integrity impact on high-impedance sensor lines. |
| RθJA | 72 °C/W - Thermal resistance enables stable operation up to 150 °C junction temperature with standard PCB layout. |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive electronics including temperature cycling, HTRB, and ESD. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (symmetrical) | Transient conduction path | Both terminals function identically; clamps voltage between them during overvoltage in either direction. |
| Case (body) | Thermal and mechanical interface | Exposed metal-free plastic body; heat dissipation relies on copper pad area (0.2" × 0.2") per terminal. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood and chassis applications requiring extended temperature cycling and humidity robustness. |
| Glass-passivated junction | Ensures stable breakdown characteristics and long-term reliability under repeated surge stress without parameter drift. |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without baking - compatible with standard lead-free assembly processes. |
| Low clamping ratio (VC/VBR) | 1.55 (12.9 V / 8.33 V) - Minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices. |
| Matte tin-plated leads | Guarantees solder wetting and intermetallic formation per J-STD-002; passes JESD 201 Class 2 whisker testing. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load dump and ISO 7637-2 pulses in engine control units. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pair or supply-to-ground. Use Value: Limits transient overshoot to ≤12.9 V during 200 A surges, preserving transceiver integrity without adding propagation delay. |
Use Scenario: Guarding PLC digital input modules against field-wiring induced surges from solenoid switching. IC Role / Device Role / Timing Role: Standoff protector on 24 V DC input lines upstream of optocoupler or level-shifter circuitry. Use Value: Withstands 800 W pulses while maintaining <1 µA leakage at 7.5 V, preventing false triggering in high-impedance sensing paths. |
| USB Type-C Port Protection | Automotive Camera Link (GMSL) |
Use Scenario: Safeguarding USB 2.0 D+/D− lines against ESD and cable-induced transients in infotainment head units. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp integrated into connector-side ESD protection network. Use Value: Clamps 8 kV contact ESD to <13 V within nanoseconds, meeting IEC 61000-4-2 Level 4 without distorting 480 Mbps data eye. |
Use Scenario: Shielding GMSL2 serial link receivers from battery rail coupling noise in ADAS camera modules. IC Role / Device Role / Timing Role: Common-mode surge suppressor across twisted-pair data lines referenced to chassis ground. Use Value: Maintains signal fidelity with <1 µA leakage and 12.9 V clamping, enabling reliable 6 Gbps video transmission under load-dump conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J7.5CAHM3_A/H | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated by OEM specifications. | Direct material substitution when halogen-free bill-of-materials is required; same footprint and thermal performance. |
| SMAJ7.5CAHE3_A/H | Lower PPPM (400 W), smaller SMA (DO-214AC) package, same VWM/VC ratings. | Suitable for space-constrained consumer or non-automotive industrial designs with lower surge energy requirements. | Use when board space is limited and 400 W surge rating suffices; requires layout revision due to smaller package dimensions. |
Compared with SMB8J7.5CAHE3_A/H, the HM3 variant offers identical protection performance with halogen-free construction, while the SMAJ7.5CAHE3_A/H reduces surge capacity by 50 % and shrinks footprint - making it appropriate only for lower-energy applications where PCB area is critical.
Availability
SMB8J7.5CAHE3_A/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O protection, and USB Type-C port hardening requiring stable component supply and AEC-Q101 traceability.
Supply support for SMB8J7.5CAHE3_A/H 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 qualification.
SMB8J7.5CAHE3_A/H belongs to Vishay's TRANSZORB® family of high-power TVS diodes, engineered specifically for robust transient immunity in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J7.5CAHE3_A/H at its rated peak pulse current?
The SMB8J7.5CAHE3_A/H 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 under standardized test conditions on 5.0 mm × 5.0 mm copper pads and defines the upper voltage limit imposed on protected circuitry during surge events. The SMB8J7.5CAHE3_A/H maintains this clamping performance across its full operating temperature range.
Is SMB8J7.5CAHE3_A/H suitable for automotive applications?
Yes, SMB8J7.5CAHE3_A/H is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix "HE3". It meets stress test requirements including temperature cycling, high-temperature reverse bias (HTRB), and ESD immunity. The SMB8J7.5CAHE3_A/H is commonly deployed in engine control units, ADAS camera modules, and body electronics where sustained operation from -55 °C to +150 °C and resistance to load-dump transients are mandatory.
What does the "CA" in SMB8J7.5CAHE3_A/H indicate?
The "CA" suffix in SMB8J7.5CAHE3_A/H denotes a bidirectional configuration - meaning the device clamps voltage surges equally in both directions between its two terminals. Unlike unidirectional variants (e.g., SMB8J7.5AHE3_A/H), the SMB8J7.5CAHE3_A/H has no cathode marking and functions symmetrically, making it ideal for protecting AC-coupled signals, differential buses like CAN or USB, or any line where polarity reversal may occur.
How does SMB8J7.5CAHE3_A/H compare to SMB10J7.5CAHE3_A/H?
SMB8J7.5CAHE3_A/H is rated for 800 W peak pulse power (PPPM) and 200 A IPPM, whereas SMB10J7.5CAHE3_A/H delivers 1000 W and 200 A in the same SMB package. The key distinction lies in thermal design margin: SMB10J7.5CAHE3_A/H supports higher surge repetition rates or elevated ambient temperatures due to its higher power rating. Both share identical VWM, VBR, and VC, but SMB8J7.5CAHE3_A/H is optimized for cost-sensitive automotive applications where 800 W meets ISO 7637-2 Pulse 5a requirements.
What is the maximum reverse leakage current for SMB8J7.5CAHE3_A/H at its stand-off voltage?
The SMB8J7.5CAHE3_A/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 7.5 V stand-off voltage (VWM), measured at 25 °C. This ultra-low leakage preserves signal integrity on high-impedance sensor inputs and minimizes standby power draw in battery-operated systems. The SMB8J7.5CAHE3_A/H maintains leakage below 10 µA even at 125 °C junction temperature, ensuring stable operation across automotive thermal profiles.
SMB8J7.5CAHE3_A/H 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:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 62A
- 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)
SMB8J7.5CAHE3_A/H FAQ
1.How can I place an order for SMB8J7.5CAHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.5CAHE3_A/H 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 SMB8J7.5CAHE3_A/H reliable?
The price and inventory of SMB8J7.5CAHE3_A/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J7.5CAHE3_A/H is usually 5 days.
3.What payment methods are accepted for SMB8J7.5CAHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.5CAHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.5CAHE3_A/H?
SMB8J7.5CAHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.5CAHE3_A/H 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 SMB8J7.5CAHE3_A/H?
For technical support, including SMB8J7.5CAHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.5CAHE3_A/H requirements.
6.How does Aetrix verify that SMB8J7.5CAHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB8J7.5CAHE3_A/H 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 SMB8J7.5CAHE3_A/H meets industry standards.
7.What is the process for return or replacement of SMB8J7.5CAHE3_A/H?
All SMB8J7.5CAHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.5CAHE3_A/H, 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 SMB8J7.5CAHE3_A/H part is unused and in its original packaging.
Return procedure for SMB8J7.5CAHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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