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Vishay General Semiconductor - Diodes Division SMBJ7.5CAHE3/52
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- Part No.:
- SMBJ7.5CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.5CAHE3/52.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,650
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Product details
Overview
SMBJ7.5CAHE3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in 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 (IPPM), and 600 W peak pulse power (10/1000 µs waveform). It protects MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ7.5CAHE3/52 datasheet, SMBJ7.5CAHE3/52 pinout, SMBJ7.5CAHE3/52 application, or SMBJ7.5CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and compliance with UL 497B surge protector classification.
Technical Context
This device operates as a voltage-clamping protection element across bidirectional signal or DC bus lines, responding within <1 ps to transient overvoltages induced by inductive switching or ESD. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<100 µA at VWM).
The SMBJ7.5CAHE3/52 is rated for 600 W peak pulse power under 10/1000 µs waveform with 0.01% duty cycle, and supports repetitive surge events when thermally managed per its RθJA = 100 °C/W rating. It meets MSL Level 1 per J-STD-020 and is qualified to AEC-Q101 for automotive-grade reliability.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 8.33 V / 9.21 V at IT = 1 mA - Confirmed breakdown threshold range ensuring reliable triggering during transients. |
| VC @ IPPM | 12.9 V at 46.5 A - Clamped voltage seen by protected circuit during worst-case 600 W surge; limits stress on downstream components. |
| PPPM | 600 W (10/1000 µs) - Peak transient energy absorption capacity without failure; enables robust protection against lightning or load-switching spikes. |
| TJ Range | –55 °C to +150 °C - Full operational junction temperature range supporting deployment in under-hood automotive or industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with automated pick-and-place. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control units and body electronics where reliability under thermal cycling and vibration is critical. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are symmetrical; both ends function identically for transient suppression in either direction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 1) | Transient current entry point (bidirectional) | Accepts surge current from either polarity; connects to line being protected (e.g., RS-485 A/B, CAN H/L, or DC bus). |
| Cathode (Terminal 2) | Transient current return path (bidirectional) | Completes clamping path to reference plane (GND or complementary line); identical electrical role to Anode due to symmetry. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., USB D+/D–, CAN, RS-485) without polarity concerns. |
| 600 W peak pulse power | Withstands high-energy transients such as IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) when properly laid out with recommended 5.0 mm × 5.0 mm copper pads. |
| AEC-Q101 qualification | Validates suitability for automotive subsystems requiring extended temperature operation, lifetime reliability, and resistance to mechanical stress. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life before reflow; eliminates baking requirements and simplifies SMT manufacturing flow. |
| UL 497B recognition (QVGQ2) | Confirms compliance as a listed surge protective component for telecom and data line applications per safety standards. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Suppresses voltage spikes generated by relay coil de-energization and brushed motor commutation in PLC I/O modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed across 24 V DC input terminals to clamp transients before they reach upstream regulators and microcontrollers. Use Value: Prevents latch-up or permanent damage to 3.3 V logic circuits by limiting transient voltage to ≤12.9 V during 46.5 A surge events. |
Use Scenario: Protects LIN bus transceivers and door module sensors from battery dump and load-dump transients in 12 V vehicle networks. IC Role / Device Role / Timing Role: Placed between LIN line and ground to absorb ±100 V/50 ms load-dump energy while maintaining signal integrity. Use Value: Enables compliance with ISO 7637-2 Pulse 5a/b without additional series impedance, preserving bus timing margins. |
| Telecom Power Feeds | Consumer Sensor Interfaces |
|
Use Scenario: Shields PoE-powered Ethernet ports from induced surges on twisted-pair cables exposed to outdoor environments. IC Role / Device Role / Timing Role: Bidirectional clamp on each data pair (e.g., pins 1–2 and 3–6) referenced to common-mode ground. Use Value: Limits common-mode surge voltage to <13 V, preventing damage to PHY ICs rated for 16 V absolute maximum. |
Use Scenario: Safeguards I²C lines connecting environmental sensors (e.g., temperature/humidity) to MCU in smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 200 pF typical at 0 V) placed directly at connector to suppress ESD up to ±15 kV contact discharge. Use Value: Maintains I²C rise/fall times <300 ns while suppressing transients that would otherwise corrupt 100 kHz clock/data signals. |
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 ratings. | Not approved for automotive use; suitable for industrial or consumer designs without automotive qualification mandates. | Select when AEC-Q101 is not required and cost optimization is prioritized over automotive reliability validation. |
| SMCJ7.5CAHE3_A/H | Larger SMC (DO-214AB) package; higher 1500 W PPPM rating; same VWM/VBR/VC specs; RθJA = 35 °C/W. | Better thermal performance for high-repetition-rate surges; requires larger PCB area (7.11 mm × 6.22 mm vs. 5.59 mm × 4.06 mm). | Choose when system-level surge testing exceeds 600 W or sustained thermal dissipation demands lower junction-to-ambient resistance. |
Compared with SMBJ7.5CA-E3/52, the SMBJ7.5CAHE3/52 adds AEC-Q101 qualification for automotive use, while the SMCJ7.5CAHE3_A/H offers higher surge capacity and superior thermal management at the expense of board space-making SMBJ7.5CAHE3/52 optimal for space-constrained, automotive-qualified 600 W protection.
Availability
SMBJ7.5CAHE3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and consumer sensor interfaces requiring stable component supply and AEC-Q101-compliant surge protection.
Supply support for SMBJ7.5CAHE3/52 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, and protection devices with emphasis on reliability, efficiency, and application-specific performance.
The SMBJ series was developed for high-reliability transient suppression in compact surface-mount formats, targeting automotive, industrial, and telecom systems where robustness and standardized packaging are essential.
FAQ
What is the clamping voltage of SMBJ7.5CAHE3/52 at its rated peak pulse current?
The SMBJ7.5CAHE3/52 has a maximum clamping voltage (VC) of 12.9 V at its rated peak pulse current (IPPM) of 46.5 A, measured using a 10/1000 µs waveform. This value ensures downstream ICs and MOSFETs experience limited overvoltage stress during transient events. The SMBJ7.5CAHE3/52 maintains this clamping performance across its full operating temperature range of –55 °C to +150 °C.
Is SMBJ7.5CAHE3/52 suitable for automotive applications?
Yes, SMBJ7.5CAHE3/52 is AEC-Q101 qualified, confirming its suitability for automotive applications including body electronics, infotainment interfaces, and power distribution modules. Its qualification covers temperature cycling, humidity bias, mechanical shock, and surge endurance testing. The SMBJ7.5CAHE3/52 is explicitly designated for automotive use via the "HE3" suffix in its ordering code.
How does the bidirectional design of SMBJ7.5CAHE3/52 affect its circuit placement?
The bidirectional design of SMBJ7.5CAHE3/52 eliminates polarity constraints: it can be placed across any two nodes without regard to anode/cathode orientation, making it ideal for differential lines like CAN, RS-485, or AC-coupled signals. Unlike unidirectional TVS diodes, SMBJ7.5CAHE3/52 provides symmetric clamping in both voltage polarities, simplifying layout and reducing BOM complexity.
What is the thermal resistance of SMBJ7.5CAHE3/52, and how does it impact PCB layout?
The SMBJ7.5CAHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures during repetitive surges, designers must provide adequate copper area and avoid excessive trace length. The SMBJ7.5CAHE3/52 datasheet specifies pad dimensions to achieve this RθJA value.
Does SMBJ7.5CAHE3/52 meet UL safety certification requirements?
Yes, SMBJ7.5CAHE3/52 carries Underwriters Laboratories recognition under UL 497B (QVGQ2 file E136766) for surge protectors, covering both unidirectional and bidirectional configurations. This certification validates its use in telecom, data line, and low-voltage power interface applications where regulatory compliance is mandatory. The SMBJ7.5CAHE3/52 meets these requirements without derating or additional external components.
SMBJ7.5CAHE3/52 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):
- 46.5A
- Power - Peak Pulse:
- 600W
- 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 (SMBJ)
SMBJ7.5CAHE3/52 FAQ
1.How can I place an order for SMBJ7.5CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.5CAHE3/52 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 SMBJ7.5CAHE3/52 reliable?
The price and inventory of SMBJ7.5CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.5CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ7.5CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.5CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.5CAHE3/52?
SMBJ7.5CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.5CAHE3/52 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 SMBJ7.5CAHE3/52?
For technical support, including SMBJ7.5CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.5CAHE3/52 requirements.
6.How does Aetrix verify that SMBJ7.5CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ7.5CAHE3/52 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 SMBJ7.5CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ7.5CAHE3/52?
All SMBJ7.5CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.5CAHE3/52, 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 SMBJ7.5CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ7.5CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.5CAHE3/52 Tags
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