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Vishay General Semiconductor - Diodes Division SMBJ7.5CAHE3_B/I
- Part No.:
- SMBJ7.5CAHE3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5CAHE3_B/I.pdf
- Description:
- 600W,7.5V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,420
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Product details
Overview
SMBJ7.5CAHE3_B/I from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 7.5 V stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR) at 1 mA, 12.9 V maximum clamping voltage (VC) at 46.5 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial and telecom systems.
For engineers reviewing the SMBJ7.5CAHE3_B/I datasheet, SMBJ7.5CAHE3_B/I pinout, SMBJ7.5CAHE3_B/I application, or SMBJ7.5CAHE3_B/I equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (−55 to +150 °C), and bidirectional clamping behavior critical for ESD and surge protection design.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling protection of AC-coupled or differential signal lines without polarity constraints. Its glass-passivated junction ensures stable leakage (<100 µA at VWM) and fast response time (<1 ns), while low incremental surge resistance supports consistent clamping under repetitive transients.
The device is rated for 600 W peak pulse power (10/1000 µs), derated above 25 °C per Fig. 2, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its AEC-Q101 qualification (denoted by HE3 suffix) confirms suitability for automotive electronics where reliability under thermal cycling and humidity is mandatory.
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. |
| VBR (min/max) | 8.33 V / 9.21 V at IT = 1 mA - Ensures reliable triggering above normal operating voltage with tight tolerance. |
| VC @ IPPM | 12.9 V at 46.5 A - Clamped voltage during 600 W transient; determines protected circuit's maximum stress level. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; defines surge energy absorption capacity. |
| IPPM | 46.5 A - Peak pulse current corresponding to VC; sets minimum PCB trace and layout current rating. |
| TJ Range | −55 °C to +150 °C - Full operational junction temperature range; supports under-hood and industrial ambient use. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; guides heatsinking requirements. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bidirectional) | Reversible transient conduction path | Either terminal serves as anode or cathode depending on transient polarity; no band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock. |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy surges common in load-switching and lightning-induced transients without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.44) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio suppressors. |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly processes without moisture sensitivity concerns. |
| Glass passivated junction | Ensures stable leakage current (<100 µA at VWM) and long-term parameter stability under thermal stress. |
Applications
| Industrial Sensor Interface Protection | Automotive CAN Bus Transient Suppression |
|---|---|
|
Use Scenario: Protecting 24 V analog sensor outputs (e.g., pressure, temperature) from inductive kickback in factory automation PLCs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across signal and ground, absorbing ±1 kV EFT bursts per IEC 61000-4-4. Use Value: Maintains signal integrity below 12.9 V clamp during 46.5 A surge, preventing ADC saturation or op-amp latch-up. |
Use Scenario: Safeguarding CAN_H/CAN_L differential pair against battery dump and load dump events in vehicle body control modules. IC Role / Device Role / Timing Role: Symmetric TVS connected line-to-line and line-to-ground, leveraging bidirectional operation to suppress both polarities of transients. Use Value: Withstands 600 W pulses without parametric shift, meeting ISO 7637-2 Pulse 1/2/5a requirements for automotive networks. |
| Telecom Line Card Surge Protection | Consumer USB Port ESD Hardening |
|
Use Scenario: Shielding Ethernet PHY interface pins (e.g., RJ45 magnetics secondary side) from lightning-induced surges in outdoor access points. IC Role / Device Role / Timing Role: Primary front-end TVS on differential data lines, placed before common-mode chokes to limit common-mode overvoltage. Use Value: 12.9 V clamping ensures PHY ICs (e.g., DP83848) remain within absolute maximum ratings during 10/1000 µs surges up to 46.5 A. |
Use Scenario: Adding secondary-level ESD protection on USB 2.0 D+/D− lines in smart home hubs exposed to human-body-model (HBM) discharges. IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp (CJ < 100 pF at 0 V) placed adjacent to connector to shunt ESD before reaching USB transceiver. Use Value: Sub-1 ns response captures HBM events before transceiver input structures fail, while 7.5 V VWM avoids signal attenuation on 3.3 V logic lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.5CA-E3/52 | No AEC-Q101 qualification; commercial-grade only; same VWM, VBR, VC, and PPPM. | Suitable for non-automotive industrial or consumer designs where qualification is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and lifecycle assurance is not needed. |
| SMAJ7.5CAHE3_A/H | Smaller SMA (DO-214AC) package; lower PPPM = 400 W; identical VWM/VBR/VC specs but reduced surge margin. | Fits space-constrained layouts but cannot handle same energy as SMBJ7.5CAHE3_B/I in high-surge environments. | Choose only if board area is critical and worst-case surge current remains ≤31 A (per SMAJ 400 W rating). |
Compared with SMBJ7.5CAHE3_B/I, the E3/52 alternative lacks automotive qualification yet matches all electrical specs, while the SMAJ7.5CAHE3_A/H offers footprint reduction at the expense of 33 % lower peak pulse power - requiring careful surge energy budgeting in final system validation.
Availability
SMBJ7.5CAHE3_B/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive CAN bus nodes, telecom line cards, and consumer USB port protection requiring stable component supply across production lifecycles.
Supply support for SMBJ7.5CAHE3_B/I 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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SMBJ series was engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 compliance, high pulse power, and stable clamping are essential.
FAQ
What is the clamping voltage of SMBJ7.5CAHE3_B/I at its rated peak pulse current?
The SMBJ7.5CAHE3_B/I has a maximum clamping voltage (VC) of 12.9 V at its rated peak pulse current (IPPM) of 46.5 A, measured with a 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuits during surge events and is confirmed in the Vishay datasheet Document Number 88392, Table on page 2. The SMBJ7.5CAHE3_B/I maintains this clamping performance across its full operating temperature range.
Is SMBJ7.5CAHE3_B/I suitable for automotive applications?
Yes, SMBJ7.5CAHE3_B/I is AEC-Q101 qualified, as indicated by the "HE3" suffix in its part number. This certification covers stress tests including temperature cycling, humidity bias, and mechanical shock - validating its use in automotive subsystems such as body control modules and infotainment interfaces. The SMBJ7.5CAHE3_B/I meets ISO 7637-2 requirements when applied per recommended layout guidelines in the Vishay datasheet.
Does SMBJ7.5CAHE3_B/I have polarity markings on the package?
No, SMBJ7.5CAHE3_B/I is a bidirectional TVS diode and carries no polarity marking - the SMB (DO-214AA) package has symmetrical terminals with no cathode band. This reflects its ability to conduct equally in both directions, making it ideal for AC signal lines or differential buses like CAN or RS-485. Unidirectional variants (e.g., SMBJ7.5AHE3_B/I) do include a cathode band, but that does not apply to the CA version.
What is the maximum reverse leakage current for SMBJ7.5CAHE3_B/I at its stand-off voltage?
The maximum reverse leakage current (ID) for SMBJ7.5CAHE3_B/I is 100 µA at its stand-off voltage (VWM) of 7.5 V and ambient temperature of 25 °C. This value is specified in the Electrical Characteristics table on page 2 of the Vishay datasheet (Document Number 88392). Leakage remains well below 1 mA even at elevated temperatures, ensuring minimal impact on low-power sensor or communication circuits.
How does the thermal resistance of SMBJ7.5CAHE3_B/I affect PCB layout?
The SMBJ7.5CAHE3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under sustained power dissipation, designers must allocate adequate copper area and avoid narrow traces. For intermittent surge duty (duty cycle ≤ 0.01 %), thermal mass dominates; for continuous DC leakage scenarios, thermal relief and pad size become critical - always referencing the thermal curves in Figure 5 of the Vishay datasheet.
SMBJ7.5CAHE3_B/I 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):
- 46.5A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ7.5CAHE3_B/I FAQ
1.How can I place an order for SMBJ7.5CAHE3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5CAHE3_B/I 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 SMBJ7.5CAHE3_B/I reliable?
The price and inventory of SMBJ7.5CAHE3_B/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5CAHE3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ7.5CAHE3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5CAHE3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5CAHE3_B/I?
SMBJ7.5CAHE3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5CAHE3_B/I 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 SMBJ7.5CAHE3_B/I?
For technical support, including SMBJ7.5CAHE3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5CAHE3_B/I requirements.
6.How does Aetrix verify that SMBJ7.5CAHE3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5CAHE3_B/I 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 SMBJ7.5CAHE3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ7.5CAHE3_B/I?
All SMBJ7.5CAHE3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5CAHE3_B/I, 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 SMBJ7.5CAHE3_B/I part is unused and in its original packaging.
Return procedure for SMBJ7.5CAHE3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5CAHE3_B/I Tags
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