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Taiwan Semiconductor Corporation SMBJ7V0CA
- Part No.:
- SMBJ7V0CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7V0CA.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
SMBJ7V0CA from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy ESD and surge protection in DC power rails and signal lines. It features a 7.0 V working stand-off voltage (VWM), 12.0 V maximum clamping voltage (VC@IPP) at 200 A peak pulse current, and 600 W peak pulse power rating with <1.0 ps response time - deployed in automotive lighting control modules, industrial I/O interfaces, and USB port protection circuits.
For engineers reviewing the SMBJ7V0CA datasheet, SMBJ7V0CA pinout, SMBJ7V0CA application, or SMBJ7V0CA equivalent, key selection criteria include bidirectional clamping symmetry, low leakage (<1 µA @ 7.0 V), ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, DO-214AA (SMB) package thermal performance (RθJA = 55 °C/W), and unidirectional/bidirectional marking distinction (CA suffix denotes bidirectional).
Technical Context
The SMBJ7V0CA implements a planar passivated silicon junction optimized for fast transient suppression without degradation under repeated 10/1000 µs surges. Its bidirectional configuration enables symmetric clamping across both polarities, eliminating need for polarity-aware layout - critical for AC-coupled or floating-bus applications like CAN transceiver protection or RS-485 common-mode surge handling.
Thermal design relies on DO-214AA's low RθJC (10 °C/W) and RθJA (55 °C/W), enabling sustained operation up to TJ = +150 °C. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity - supporting lead-free reflow without popcorn cracking or intermetallic delamination.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse voltage before leakage exceeds 1 µA; defines safe operating margin below breakdown. |
| VBR min/max | 7.78 V / 9.51 V @ IT = 10 mA - Ensures reliable turn-on within ±10% tolerance across production lot; guarantees clamping activation before system damage threshold. |
| VC@IPP | 12.0 V @ IPP = 200 A (10/1000 µs) - Limits downstream voltage excursion during worst-case surge; protects 12 V logic ICs and microcontrollers. |
| PPK | 600 W - Sustains single high-energy transients per ISO 7637-2 without failure; supports automotive load-dump immunity testing. |
| ID@VWM | <1 µA - Minimizes standby power loss in battery-powered systems; avoids false triggering in high-impedance sensor inputs. |
| TJ max | +150 °C - Enables placement near heat-generating components (e.g., power MOSFETs, DC-DC converters) without derating. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with cathode band omitted (CA suffix indicates symmetrical terminals). Matte tin-plated leads meet J-STD-002 solderability; UL 94V-0 molding compound ensures flame resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge conduction path | No polarity marking required; either terminal serves as anode or cathode depending on transient polarity - simplifies PCB routing and eliminates orientation errors. |
Key Features
| Feature | Design Value |
|---|---|
| Clamping speed | <1.0 ps response - Arrests ESD events before propagation into sensitive analog front-ends or digital logic gates. |
| ISO 7637-2 compliance | Pulse 1/2a/2b/3a/3b qualified - Validated for automotive 12 V/24 V system-level surge immunity without external filtering. |
| Moisture sensitivity | J-STD-020 Level 1 - Zero bake requirement prior to reflow; compatible with standard SMT assembly lines. |
| Leakage performance | <1 µA @ VWM - Prevents cumulative error in precision voltage references and high-Z sensor bias networks. |
| RoHS & halogen-free | Compliant per IEC 61249-2-21 - Meets global environmental regulations for industrial and automotive end equipment. |
Applications
| Automotive Lighting Control | Industrial I/O Protection |
|---|---|
Use Scenario: Protecting LED driver ICs and microcontroller GPIOs from load dump and inductive kickback in headlight/taillight modules. IC Role / Device Role / Timing Role: Bidirectional TVS clamp absorbing 600 W surges while maintaining <12.0 V rail integrity during 10/1000 µs transients. Use Value: Eliminates need for discrete RC snubbers and reduces BOM count by 2–3 components per channel. |
Use Scenario: Shielding PLC analog input channels (4–20 mA, 0–10 V) from field-wiring induced surges and ESD events. IC Role / Device Role / Timing Role: Fast-clamping interface protector placed directly at connector entry point to limit voltage seen by ADC front-end. Use Value: Maintains measurement accuracy by holding clamped voltage ≤12.0 V - below ADC overvoltage tolerance of most 12-bit industrial converters. |
| USB 2.0 Port Protection | RS-485 Transceiver Interface |
Use Scenario: Safeguarding USB data lines (D+/D−) and VBUS against contact ESD (±15 kV air, ±8 kV contact) per IEC 61000-4-2. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed inline with differential pair to suppress ESD without signal distortion. Use Value: Junction capacitance <50 pF (typ.) preserves USB 2.0 eye diagram integrity up to 480 Mbps. |
Use Scenario: Protecting half-duplex RS-485 transceivers (e.g., MAX13487, SN65HVD72) from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Common-mode surge limiter across A/B bus lines and ground, leveraging symmetrical clamping to suppress differential and common-mode transients. Use Value: Withstands ≥200 A (10/1000 µs) common-mode surge while limiting voltage to ≤12.0 V - within transceiver absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ7.0CA | Same DO-214AC (SMA) package; slightly higher VC@IPP = 12.5 V @ 200 A; RθJA = 65 °C/W vs. 55 °C/W | Lower power density due to larger thermal resistance; less suitable for high-ambient industrial enclosures | Select SMBJ7V0CA when board space is constrained and ambient temperature exceeds 85 °C. |
| ON Semiconductor SMCJ7.0CA | DO-214AB (SMC) package; 1500 W PPK rating; VC@IPP = 12.3 V @ 300 A; 3× footprint area | Over-specified for 600 W use cases; requires PCB real estate increase of ~220% | Choose SMBJ7V0CA for cost-sensitive, space-constrained designs where 600 W rating suffices. |
Compared with SMAJ7.0CA and SMCJ7.0CA, the SMBJ7V0CA delivers optimal balance of surge robustness, thermal efficiency, and compact DO-214AA footprint - making it preferred for automotive body electronics and dense industrial PCBs where layout area and thermal management are co-constrained.
Availability
SMBJ7V0CA is available at Aetrix Electronics and suitable for automotive lighting control, industrial I/O protection, USB 2.0 port hardening, and RS-485 transceiver interface applications requiring stable component supply and full traceability.
Supply support for SMBJ7V0CA 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated Taiwanese manufacturer specializing in discrete semiconductors, including TVS diodes, rectifiers, and MOSFETs, with ISO/TS 16949 certification for automotive-grade products.
The SMBJ series was developed specifically for high-reliability transient suppression in automotive and industrial environments - emphasizing fast response, low clamping voltage, and robust package reliability under thermal cycling and humidity stress.
FAQ
What does the 'CA' suffix indicate in SMBJ7V0CA?
The 'CA' suffix in SMBJ7V0CA explicitly denotes a bidirectional configuration - meaning the device provides symmetrical clamping for both positive and negative transients without polarity dependence. Unlike unidirectional variants (e.g., SMBJ7.0A), SMBJ7V0CA has no cathode band marking and functions identically regardless of terminal orientation, simplifying layout for AC-coupled or floating-bus applications such as RS-485 or CAN physical layers.
How does SMBJ7V0CA compare to SMBJ7.0A in terms of electrical performance?
SMBJ7V0CA and SMBJ7.0A share identical VWM (7.0 V), VBR range (7.78–9.51 V), and VC@IPP (12.0 V @ 200 A), but differ fundamentally in polarity: SMBJ7.0A is unidirectional (cathode-marked, conducts only in reverse), while SMBJ7V0CA is bidirectional (no marking, clamps both polarities). This makes SMBJ7V0CA suitable for protecting differential pairs or AC signals where polarity reversal occurs, whereas SMBJ7.0A is reserved for DC rail protection with defined ground reference.
Is SMBJ7V0CA compliant with automotive surge immunity standards?
Yes, SMBJ7V0CA is explicitly rated for ISO 7637-2 Pulse 1 (inductive load disconnect), Pulse 2a (supply line transient), Pulse 2b (load dump simulation), and Pulses 3a/3b (switching noise), as confirmed in Taiwan Semiconductor's official datasheet revision R2104. Its 600 W peak pulse power and 12.0 V clamping voltage ensure compliance with OEM-level requirements for 12 V vehicle electrical systems without additional filtering components.
What is the maximum junction temperature and thermal resistance of SMBJ7V0CA?
SMBJ7V0CA has a maximum junction temperature (TJ) of +150 °C and thermal resistances of RθJC = 10 °C/W (junction-to-case) and RθJA = 55 °C/W (junction-to-ambient). These values are measured under standard JEDEC conditions on 1-inch² copper pad; actual board-level performance depends on PCB copper area and airflow, but the low RθJA enables reliable operation in sealed enclosures up to +85 °C ambient without derating.
Does SMBJ7V0CA require special handling for moisture sensitivity?
No - SMBJ7V0CA is rated J-STD-020 Level 1, meaning it has unlimited floor life and requires no baking or dry-pack handling prior to reflow soldering. This eliminates moisture-related defects (e.g., popcorning) during lead-free reflow profiles and supports direct integration into high-throughput SMT lines without process modification.
SMBJ7V0CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ7V0CA FAQ
1.How can I place an order for SMBJ7V0CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7V0CA 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 SMBJ7V0CA reliable?
The price and inventory of SMBJ7V0CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7V0CA is usually 5 days.
3.What payment methods are accepted for SMBJ7V0CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7V0CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7V0CA?
SMBJ7V0CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7V0CA 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 SMBJ7V0CA?
For technical support, including SMBJ7V0CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7V0CA requirements.
6.How does Aetrix verify that SMBJ7V0CA is sourced from the original manufacturer or authorized distributors?
All SMBJ7V0CA 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 SMBJ7V0CA meets industry standards.
7.What is the process for return or replacement of SMBJ7V0CA?
All SMBJ7V0CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7V0CA, 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 SMBJ7V0CA part is unused and in its original packaging.
Return procedure for SMBJ7V0CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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