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Vishay General Semiconductor - Diodes Division SMB8J7.5CA-E3/5B
- Part No.:
- SMB8J7.5CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J7.5CA-E3/5B.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,532
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Product details
Overview
SMB8J7.5CA-E3/5B 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 SMB8J7.5CA-E3/5B datasheet, SMB8J7.5CA-E3/5B pinout, SMB8J7.5CA-E3/5B application, or SMB8J7.5CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping ratio (VC/VWM = 1.72), RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector, responding within <1 ps to transients induced by inductive switching or ESD events. Its glass-passivated junction ensures stable breakdown behavior, while bidirectional symmetry enables protection of AC-coupled or differential lines without polarity constraints.
The device is rated for -55 °C to +150 °C operating junction temperature, meets MSL Level 1 per J-STD-020 (260 °C peak reflow), and delivers 62.0 A IPPM under derated conditions above 25 °C ambient - validated using ANSI/IEEE C62.35-compliant 10/1000 µs surge waveforms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - maximum continuous reverse working voltage before clamping initiates |
| VBR min/max | 8.33 V / 9.21 V at 1.0 mA - guaranteed breakdown threshold window for reliable turn-on |
| VC @ IPPM | 12.9 V at 200 A - clamping voltage limiting downstream IC stress during 10/1000 µs surge |
| PPPM | 800 W - peak transient energy absorption capacity under standardized surge waveform |
| ID @ VWM | 1.0 µA - ultra-low leakage preserving signal integrity in high-impedance circuits |
| TJ max | +150 °C - enables use in under-hood automotive environments and thermally constrained PCBs |
| AEC-Q101 | Qualified - certified for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. No polarity marking - bidirectional operation confirmed.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as input/output; no cathode band - enables layout flexibility on differential or AC lines |
| Case (body) | Thermal and mechanical interface | Plastic molding meets UL 94 V-0; thermal resistance RθJA = 72 °C/W on 5.0 mm × 5.0 mm pads |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and ADAS sensor interfaces |
| Low clamping ratio (VC/VWM) | 1.72 - minimizes overvoltage exposure to protected ICs compared to higher-ratio alternatives |
| MSL Level 1 rating | Enables single-pass reflow at 260 °C peak without moisture-induced failure |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
| RoHS-compliant E3 suffix | Meets EU RoHS Directive 2011/65/EU with no exemptions required |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD transceiver inputs against load dump and ISO 7637-2 pulses in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional shunt clamp absorbing up to 800 W surges while maintaining <12.9 V rail integrity. Use Value: Prevents latch-up or damage to 3.3 V/5 V transceivers during 12 V system transients - validated per AEC-Q101 stress profiles. | Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers exposed to relay coil flyback. IC Role / Device Role / Timing Role: Fast-response (<1 ps) voltage limiter diverting >200 A surge current away from microcontroller GPIOs. Use Value: Eliminates need for external series impedance or RC filtering - reduces BOM count and board space vs. discrete Zener+capacitor solutions. |
| Consumer USB Port ESD Protection | Telecom Line Interface Protection |
Use Scenario: Shielding USB 2.0 D+/D- lines from ±15 kV contact ESD per IEC 61000-4-2. IC Role / Device Role / Timing Role: Low-capacitance (typ. 150 pF at 0 V) bidirectional clamp with sub-ns response. Use Value: Preserves signal integrity up to 480 Mbps without data corruption - verified via TDR measurements in production test. | Use Scenario: Protecting RS-485 transceiver terminals in base station remote units subjected to lightning-induced surges. IC Role / Device Role / Timing Role: High-power (800 W) transient suppressor placed directly at connector entry point. Use Value: Withstands repeated 10/1000 µs surges up to 200 A without degradation - supports 15-year field life in outdoor telecom cabinets. |
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-E3/5B | 1000 W PPPM (unidirectional only); 12.9 V VC at 100 A IPPM | Unidirectional - unsuitable for AC or differential lines without external biasing | Select only when protecting DC rails with known polarity and higher surge margin required |
| SMCJ7.5CA-E3/57T | 1500 W PPPM; larger SMC (DO-214AB) package; RθJA = 35 °C/W | Higher power handling but 3.5× larger footprint and 2.2× higher thermal resistance | Choose when system-level surge tests exceed 800 W and PCB area permits larger package |
Compared with SMBJ7.5CA-E3/5B and SMCJ7.5CA-E3/57T, SMB8J7.5CA-E3/5B uniquely balances 800 W surge capability, AEC-Q101 qualification, and SMB footprint - making it optimal for space-constrained automotive and industrial modules requiring bidirectional protection without redesign.
Availability
SMB8J7.5CA-E3/5B is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, consumer USB port hardening, and telecom line interface designs requiring stable component supply across multi-year production cycles.
Supply support for SMB8J7.5CA-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 and application-specific performance.
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 AEC-Q101 compliance and low clamping voltage are critical.
FAQ
What is the clamping voltage of SMB8J7.5CA-E3/5B at its rated peak pulse current?
The SMB8J7.5CA-E3/5B has a maximum clamping voltage (VC) of 12.9 V when subjected to its rated 200 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees downstream circuit protection within safe voltage margins for 3.3 V and 5 V systems. The SMB8J7.5CA-E3/5B maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMB8J7.5CA-E3/5B suitable for automotive applications?
Yes, SMB8J7.5CA-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, ADAS sensors, and body electronics. Its construction - glass-passivated junction, matte tin terminations, MSL Level 1 reflow compatibility, and -55 °C to +150 °C operation - meets stringent automotive reliability requirements. The SMB8J7.5CA-E3/5B is designated with HE3/HM3 suffixes for automotive ordering, and the E3/5B variant shares identical electrical and thermal specs.
How does the bidirectional nature of SMB8J7.5CA-E3/5B affect its PCB layout?
The SMB8J7.5CA-E3/5B has no polarity marking and functions identically in either orientation, simplifying PCB layout for AC-coupled, differential, or floating signal lines. Unlike unidirectional TVS diodes, it eliminates the need for cathode alignment checks during automated placement or manual inspection. This symmetry allows direct placement across USB D+/D-, RS-485 A/B, or CAN H/L pairs without directional constraints - reducing assembly errors and design iteration time for the SMB8J7.5CA-E3/5B.
What is the thermal resistance of SMB8J7.5CA-E3/5B, and how does it impact power dissipation?
The SMB8J7.5CA-E3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value defines the temperature rise per watt of sustained power - meaning 1 W of average dissipation raises junction temperature by ~72 °C above ambient. Since SMB8J7.5CA-E3/5B is intended for transient (not continuous) operation, RθJA primarily affects recovery time between surges and derating above 25 °C ambient, per Figure 2 in the datasheet.
Does SMB8J7.5CA-E3/5B meet RoHS and halogen-free requirements?
Yes, the SMB8J7.5CA-E3/5B carries the "E3" suffix, indicating full compliance with the EU RoHS Directive 2011/65/EU and absence of restricted substances including lead, cadmium, mercury, hexavalent chromium, PBB, and PBDE. It is not halogen-free - for halogen-free compliance, the HM3-suffixed variant (e.g., SMB8J7.5CA-HM3/5B) must be selected. Both E3 and HM3 versions meet JESD 201 Class 2 whisker resistance testing.
SMB8J7.5CA-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:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB8J7.5CA-E3/5B FAQ
1.How can I place an order for SMB8J7.5CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J7.5CA-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 SMB8J7.5CA-E3/5B reliable?
The price and inventory of SMB8J7.5CA-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 SMB8J7.5CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMB8J7.5CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J7.5CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J7.5CA-E3/5B?
SMB8J7.5CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J7.5CA-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 SMB8J7.5CA-E3/5B?
For technical support, including SMB8J7.5CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J7.5CA-E3/5B requirements.
6.How does Aetrix verify that SMB8J7.5CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMB8J7.5CA-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 SMB8J7.5CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMB8J7.5CA-E3/5B?
All SMB8J7.5CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J7.5CA-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 SMB8J7.5CA-E3/5B part is unused and in its original packaging.
Return procedure for SMB8J7.5CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J7.5CA-E3/5B Tags
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