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Diodes Incorporated SMBJ7.0CAQ-13-F
- Part No.:
- SMBJ7.0CAQ-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0CAQ-13-F.pdf
- Description:
- TRANSIENT VOLTAGE SUPPRESSOR SMB
- Quantity:
- Payment:
- Shipping:
Inventory:4,925
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Product details
Overview
SMBJ7.0CAQ-13-F from Diodes Incorporated is a bi-directional automotive-grade transient voltage suppressor (TVS) diode in SMB package, rated for 600W peak pulse power, 7.0V reverse standoff voltage (VRWM), and 12.0V max clamping voltage (VC) at 50A peak pulse current. It protects CAN, LIN, and sensor interfaces in 12V automotive subsystems against ISO7637-2 Pulse 1/2a/3a/3b transients and ISO10605 ESD events.
For engineers reviewing the SMBJ7.0CAQ-13-F datasheet, SMBJ7.0CAQ-13-F pinout, SMBJ7.0CAQ-13-F application, or SMBJ7.0CAQ-13-F equivalent, key selection criteria include clamping voltage margin relative to IC VCC rails, IEC 61000-4-2 contact discharge robustness, AEC-Q101 qualification status, and SMB footprint compatibility with board-level surge protection layout constraints.
Technical Context
This bi-directional TVS operates symmetrically across both polarities, enabling protection of differential buses like CAN FD without polarity sensitivity. Its 7.0V VRWM ensures compatibility with 5V–12V logic-supplied automotive sensors while maintaining sufficient margin above battery nominal voltage (13.5V) to avoid leakage-induced power loss during cold-crank conditions.
The device uses silicon avalanche junction technology with controlled breakdown characteristics, delivering sub-100ns response time to 10/1000μs transients. Clamping performance is validated per REA-defined waveform and derated linearly above +25°C ambient (4.8W/°C), supporting operation up to +175°C junction temperature in under-hood environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600W - Sustains ISO7637-2 Pulse 3b (+150V, 50ms) without failure |
| Reverse Standoff Voltage | 7.0V - Blocks normal 5V/12V rail operation; triggers only during overvoltage |
| Max Clamping Voltage | 12.0V @ 50A - Limits downstream IC stress below 13.5V automotive supply maximum |
| Breakdown Voltage | 7.78–8.60V @ 1.0mA - Ensures predictable, repeatable avalanche initiation |
| Leakage Current | 200µA @ 7.0V - Minimizes quiescent power draw in always-on vehicle modules |
| Operating Temp Range | −55°C to +175°C - Validated for engine control unit (ECU) and transmission control module locations |
| AEC-Q101 Qualified | Yes - Certified for automotive electronics per stress test requirements including HTOL, TCT, and ESD |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, molded plastic body with UL 94V-0 flammability rating; moisture sensitivity level 1 per J-STD-020; 0.1g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during negative transients | Connects to protected line (e.g., CAN_H or LIN bus); no polarity marking on bi-directional variant |
| Cathode | Current entry point during positive transients | Connects to same protected line; symmetrical terminal function enables bidirectional clamping |
| Case | Thermal path and mechanical anchor | Exposed copper pad required for thermal dissipation; soldered directly to PCB ground plane |
Key Features
| Feature | Design Value |
|---|---|
| ISO10605 ESD robustness | 30kV air/contact discharge - Eliminates need for external ESD diodes in infotainment button interfaces |
| Lead-free & halogen-free | RoHS 3 compliant; <900ppm Br+Cl, <1000ppm Sb - Meets EU automotive material declaration requirements |
| IATF 16949 manufacturing | PPAP-capable production in certified facilities - Supports Tier-1 OEM BOM release and change control traceability |
| Steady-state power rating | 5.0W @ TL = +75°C - Enables continuous operation in high-temperature junction boxes without derating |
Applications
| Automotive CAN Bus Protection | Body Control Module (BCM) Inputs |
|---|---|
Use Scenario: Protecting CAN_H/CAN_L lines in 12V powertrain networks exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bi-directional voltage clamp limiting transient excursions to ≤12.0V during ISO7637-2 Pulse 2a (+112V). Use Value: Prevents CAN transceiver latch-up and bit errors during engine cranking and ignition switching events. | Use Scenario: Shielding discrete switch inputs (door lock, window lift, mirror fold) from ESD and cable discharge. IC Role / Device Role / Timing Role: Fast-response surge absorber meeting ISO10605 30kV contact discharge requirement at each input node. Use Value: Reduces field return rates caused by switch interface damage during vehicle assembly and service. |
| Automotive Sensor Interface | Infotainment Button Panel |
Use Scenario: Safeguarding analog outputs of pressure, temperature, and position sensors connected to MCU ADC inputs. IC Role / Device Role / Timing Role: Low-leakage (200µA) clamping device preserving signal integrity below 7.0V normal operating range. Use Value: Maintains sensor accuracy while blocking transients that would otherwise saturate ADC reference rails. | Use Scenario: ESD protection for tactile buttons and capacitive touch overlays in center console and door panels. IC Role / Device Role / Timing Role: Symmetric bi-directional suppression handling ±30kV discharges without polarity-dependent failure modes. Use Value: Extends panel lifetime in high-humidity cabin environments where static buildup exceeds 15kV routinely. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bi-directional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ7.0C.TCT-ND (Mouser) | Same VRWM (7.0V), identical SMB package, but not AEC-Q101 qualified | Limited to non-safety-critical consumer or industrial use; lacks PPAP documentation | Select only for cost-sensitive non-automotive designs where qualification traceability is not required |
| TPSM8-7.0 (Littelfuse) | Higher clamping voltage (13.4V @ 50A); same 600W rating; AEC-Q101 qualified | Marginally higher VC reduces protection headroom for 5V logic interfaces | Prefer when board layout requires slightly larger thermal pad area; verify downstream IC VCC tolerance |
Compared with SMBJ7.0CAQ-13-F, the Mouser alternative lacks automotive qualification and traceability, while the Littelfuse part trades tighter clamping for enhanced thermal robustness-making the Diodes device optimal for space-constrained, safety-compliant CAN/LIN nodes requiring precise voltage limiting.
Availability
SMBJ7.0CAQ-13-F is available at Aetrix Electronics and suitable for automotive ECU design, body electronics integration, and ADAS sensor interface development requiring stable component supply across multi-year production cycles.
Supply support for SMBJ7.0CAQ-13-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability components for automotive, industrial, and computing markets.
The SMBJ series targets automotive transient suppression, designed specifically to meet ISO7637-2 and ISO10605 compliance in AEC-Q101-qualified surface-mount packages for under-hood and cabin electronics.
FAQ
What is the polarity configuration of SMBJ7.0CAQ-13-F?
SMBJ7.0CAQ-13-F is a bi-directional TVS diode, meaning it has no anode/cathode polarity designation and provides symmetrical clamping for both positive and negative transients. The "C" suffix in the part number explicitly denotes bi-directionality, and the device lacks a cathode band marking per datasheet Figure 3.
Does SMBJ7.0CAQ-13-F require a heatsink for 600W pulse handling?
No external heatsink is required for single-pulse 600W events, as the device relies on PCB copper area for thermal dissipation. The SMB package's thermal resistance from junction-to-board (RθJB) is optimized for direct mounting to ≥1 cm² internal ground planes; steady-state power (5.0W) must be managed via trace width and layer stackup per Figure 6 derating curve.
How does SMBJ7.0CAQ-13-F perform under cold-crank conditions?
At −40°C, VRWM remains ≥7.0V and leakage stays below 200µA, ensuring no false triggering during 5V–6V battery sag. Its −55°C to +175°C operating range and AEC-Q101 qualification cover full automotive cold-crank (−40°C) and hot-soak (+125°C case) extremes without parameter shift beyond spec limits.
Can SMBJ7.0CAQ-13-F replace uni-directional SMBJ7.0AQ-13-F in existing designs?
Yes, but only if circuit topology allows bi-directional clamping. The bi-directional version has identical VRWM, VC, and package dimensions, but lacks polarity marking and clamps both polarities-making it unsuitable for DC-biased lines where uni-directional blocking is required. Verify bus biasing before substitution.
SMBJ7.0CAQ-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AA, SMB
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 50A
- 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:
- SMB
SMBJ7.0CAQ-13-F FAQ
1.How can I place an order for SMBJ7.0CAQ-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0CAQ-13-F 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 SMBJ7.0CAQ-13-F reliable?
The price and inventory of SMBJ7.0CAQ-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.0CAQ-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ7.0CAQ-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0CAQ-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0CAQ-13-F?
SMBJ7.0CAQ-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0CAQ-13-F 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 SMBJ7.0CAQ-13-F?
For technical support, including SMBJ7.0CAQ-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0CAQ-13-F requirements.
6.How does Aetrix verify that SMBJ7.0CAQ-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0CAQ-13-F 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 SMBJ7.0CAQ-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ7.0CAQ-13-F?
All SMBJ7.0CAQ-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0CAQ-13-F, 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 SMBJ7.0CAQ-13-F part is unused and in its original packaging.
Return procedure for SMBJ7.0CAQ-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.0CAQ-13-F Tags
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