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Vishay General Semiconductor - Diodes Division SMB8J7.5CAHE3/52
- Part No.:
- SMB8J7.5CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.5CAHE3/52.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,998
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Product details
Overview
SMB8J7.5CAHE3/52 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), 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 - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J7.5CAHE3/52 datasheet, SMB8J7.5CAHE3/52 pinout, SMB8J7.5CAHE3/52 application, or SMB8J7.5CAHE3/52 equivalent, key selection criteria include AEC-Q101 qualification, bidirectional polarity, low clamping ratio (VC/VWM ≈ 1.72), MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamping protector using an avalanche junction structure, responding within <1 ps to transients per ANSI/IEEE C62.35 standards. Its bidirectional symmetry enables suppression of both positive and negative surges without polarity dependency, and its glass-passivated chip ensures stable VBR tolerance and long-term reliability under repetitive surge stress.
Thermal performance is defined by RθJA = 72 °C/W and RθJL = 20 °C/W, supporting operation from –55 °C to +150 °C junction temperature. The device is rated for non-repetitive 8.3 ms half-sine forward surge up to 100 A (unidirectional only) and meets JESD201 Class 2 whisker resistance with matte tin-plated leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 8.33 V / 9.21 V at IT = 1.0 mA - defines tight 10.6% tolerance window for predictable turn-on threshold |
| VC @ IPPM | 12.9 V at 200 A (10/1000 µs) - limits protected circuit voltage during worst-case surge |
| PPPM | 800 W - peak transient energy absorption capability under standardized surge waveform |
| ID @ VWM | 1.0 µA - ultra-low leakage preserves signal integrity in high-impedance sensor lines |
| TJ max | +150 °C - supports under-hood automotive and industrial ambient environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking omitted for bidirectional configuration. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), 0.220" × 0.155" mounting pad layout recommended.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional terminal pair | No polarity marking; either end serves as input/output for AC or dual-polarity DC lines |
| Case (body) | Non-connected mechanical structure | Electrically isolated; no thermal or electrical tie to internal die - thermal path via soldered leads only |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics including engine control modules and ADAS sensor interfaces |
| MSL Level 1 rating | Enables standard reflow without baking; peak solder temperature up to 260 °C supported |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
| Low clamping ratio (VC/VWM) | 1.72 - minimizes overvoltage stress on downstream ICs compared to higher-ratio TVS devices |
| Matte tin lead finish | Complies with J-STD-002 and JESD22-B102; supports lead-free and SnPb assembly processes |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Voltage-clamping front-end protector placed directly at connector entry point. Use Value: Limits transient voltage to ≤12.9 V during 200 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs. | Use Scenario: Shielding digital input cards in programmable logic controllers from inductive kickback when switching solenoids or relays. IC Role / Device Role / Timing Role: Fast-response shunt element across input terminals to divert surge energy to ground. Use Value: Withstands repeated 800 W surges while maintaining <1 µA leakage at 7.5 V, preserving input logic thresholds. |
| Telecom Line Interface | Consumer Appliance Control Board |
Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHYs against ESD and lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional clamping device placed between line transformer and transceiver IC. Use Value: Symmetric clamping ensures equal protection for differential signals without polarity constraints or added board space. | Use Scenario: Securing microcontroller GPIOs and display driver lines in washing machines and HVAC systems exposed to motor commutation noise. IC Role / Device Role / Timing Role: Localized transient suppressor mounted adjacent to connectors and relay drivers. Use Value: AEC-Q101 qualification and 150 °C TJ rating ensure robustness in thermally demanding appliance enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J7.5CA-E3/52 | Same electrical specs and SMB package; RoHS-compliant but not AEC-Q101 qualified | Restricted to commercial/industrial use; not approved for automotive ECUs or ADAS subsystems | Select when AEC-Q101 is not required and cost optimization is prioritized |
| SMBJ7.5CAHE3/52 | Same VWM/VBR/VC ratings but lower PPPM (600 W vs. 800 W); identical AEC-Q101 and MSL Level 1 | Lower surge margin - suitable for less severe transients (e.g., IEC 61000-4-5 Level 3 vs. Level 4) | Choose when system-level testing confirms 600 W suffices and footprint compatibility is mandatory |
Compared with SMB8J7.5CAHE3/52, the SMB8J7.5CA-E3/52 lacks automotive qualification but offers identical surge handling for non-automotive use, while SMBJ7.5CAHE3/52 trades 200 W peak power for guaranteed SMBJ-series footprint reuse - critical where legacy layout reuse outweighs derated surge capacity.
Availability
SMB8J7.5CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer appliance control boards requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMB8J7.5CAHE3/52 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 application-specific validation.
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 SMB8J7.5CAHE3/52 at its rated peak pulse current?
The SMB8J7.5CAHE3/52 has a maximum clamping voltage (VC) of 12.9 V when subjected to a 200 A peak pulse current with a 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and ensures downstream components see limited overvoltage during surge events. The SMB8J7.5CAHE3/52 maintains this clamping performance across its specified operating temperature range.
Is SMB8J7.5CAHE3/52 suitable for automotive applications?
Yes, SMB8J7.5CAHE3/52 is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix. It undergoes stress testing for temperature cycling, highly accelerated life testing (HALT), and ESD per automotive requirements. The SMB8J7.5CAHE3/52 is commonly deployed in engine control units, body electronics, and ADAS sensor interfaces where reliability under thermal and electrical stress is critical.
What does the "CA" in SMB8J7.5CAHE3/52 indicate?
The "CA" suffix in SMB8J7.5CAHE3/52 denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive- and negative-going voltage spikes without polarity orientation constraints. This distinguishes it from unidirectional variants (e.g., SMB8J7.5AHE3/52) and makes the SMB8J7.5CAHE3/52 ideal for AC-coupled or differential signal lines such as RS-485 or CAN FD interfaces.
What is the maximum operating junction temperature for SMB8J7.5CAHE3/52?
The SMB8J7.5CAHE3/52 has a maximum operating junction temperature (TJ max) of +150 °C, enabling reliable operation in under-hood automotive environments and high-temperature industrial enclosures. This rating is supported by its thermal resistance values: RθJA = 72 °C/W (junction-to-ambient, on standard 0.2" × 0.2" pads) and RθJL = 20 °C/W (junction-to-lead), allowing effective heat dissipation through PCB copper and solder joints.
Does SMB8J7.5CAHE3/52 require special handling during PCB assembly?
No special handling is required: SMB8J7.5CAHE3/52 is rated MSL Level 1 per J-STD-020 and supports peak reflow temperatures up to 260 °C without baking. Its matte tin-plated leads comply with J-STD-002 and JESD22-B102 for solderability, and it passes JESD201 Class 2 whisker testing. The SMB8J7.5CAHE3/52 is fully compatible with standard automated SMT processes including stencil printing, pick-and-place, and convection reflow.
SMB8J7.5CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
SMB8J7.5CAHE3/52 FAQ
1.How can I place an order for SMB8J7.5CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.5CAHE3/52 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 SMB8J7.5CAHE3/52 reliable?
The price and inventory of SMB8J7.5CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J7.5CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMB8J7.5CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.5CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.5CAHE3/52?
SMB8J7.5CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.5CAHE3/52 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 SMB8J7.5CAHE3/52?
For technical support, including SMB8J7.5CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.5CAHE3/52 requirements.
6.How does Aetrix verify that SMB8J7.5CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMB8J7.5CAHE3/52 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 SMB8J7.5CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMB8J7.5CAHE3/52?
All SMB8J7.5CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.5CAHE3/52, 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 SMB8J7.5CAHE3/52 part is unused and in its original packaging.
Return procedure for SMB8J7.5CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.5CAHE3/52 Tags
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