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Taiwan Semiconductor Corporation SMBJ7.0CH
- Part No.:
- SMBJ7.0CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ7.0CH.pdf
- Description:
- 600W, 8.6V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,618
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Product details
Overview
SMBJ7.0CH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for automotive-grade ESD and surge protection in power rails and signal lines. It features a 7.0 V working stand-off voltage (VWM), 13.3 V maximum clamping voltage (VC) at 47 A peak pulse current, and 600 W peak pulse power rating with <1.0 ps response time. It is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and inductive switching immunity.
For engineers reviewing the SMBJ7.0CH datasheet, SMBJ7.0CH pinout, SMBJ7.0CH application, or SMBJ7.0CH equivalent, this device is selected for robust bidirectional overvoltage protection in 12 V automotive subsystems, industrial I/O interfaces, and DC power input stages where low clamping voltage, high surge tolerance, and moisture-insensitive reliability are critical.
Technical Context
The SMBJ7.0CH is a unidirectional/bidirectional TVS diode configured as a single die in DO-214AA (SMB) package, with glass passivated junction and matte tin-plated leads. Its bipolar operation enables symmetrical clamping in both directions without polarity sensitivity - essential for AC-coupled or floating bus protection.
It delivers 600 W non-repetitive peak impulse power (10/1000 µs waveform), 150 °C maximum junction temperature, and 10 °C/W junction-to-case thermal resistance. The device exhibits <1 µA blocking leakage at 7.0 V and supports fast transient immunity per IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT) when used with proper PCB layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level overvoltage trip threshold. |
| VBR min / max | 7.78 V / 9.51 V @ 10 mA - Breakdown voltage range defining guaranteed conduction onset under surge conditions. |
| VC @ IPP | 13.3 V @ 47 A - Clamping voltage during 10/1000 µs surge; determines worst-case voltage seen by protected IC. |
| PPK | 600 W - Peak pulse power handling capacity; defines survivability against ISO 7637-2 Pulse 1 (inductive switch-off) events. |
| ID @ VWM | <1 µA - Low leakage ensures minimal standby power loss and avoids false triggering in high-impedance circuits. |
| Response time | <1.0 ps - Sub-picosecond junction response enables effective suppression of ESD transients (IEC 61000-4-2). |
| TJ max | +150 °C - Enables reliable operation in under-hood automotive environments and enclosed industrial enclosures. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, bi-directional configuration with cathode band omitted (non-polarized marking). Case meets UL 94V-0 flammability rating; terminals are matte tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Transient current entry (bidirectional) | Accepts surge current in either polarity; no fixed anode/cathode function - symmetric conduction path. |
| Cathode (Lead 2) | Transient current exit (bidirectional) | Completes low-impedance path to ground or return rail during clamping; identical electrical role to Lead 1. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics including engine control units, body controllers, and ADAS sensor interfaces. |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) without degradation. |
| Glass passivated junction | Ensures stable breakdown characteristics and long-term reliability under thermal cycling and humidity exposure (MSL Level 1). |
| Bidirectional symmetry | Identical VBR, VC, and IPP performance in both directions - eliminates polarity concerns in AC or floating systems. |
| Low clamping ratio (VC/VBR) | 13.3 V / 7.78 V ≈ 1.71 - superior voltage limiting vs. competing 600 W SMB devices (typical ratio >1.85). |
Applications
| Automotive Power Input Protection | Industrial Digital I/O Protection |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to load-dump surges up to 35 V and inductive switching spikes. IC Role / Device Role: Primary bidirectional clamping element placed across input rail and chassis ground. Use Value: Limits transient voltage to ≤13.3 V, protecting downstream LDOs, microcontrollers, and CAN transceivers from damage. |
Use Scenario: 24 V PLC digital input modules interfacing with field sensors subject to ESD and cable discharge events. IC Role / Device Role: Front-end TVS on each isolated input channel before optocoupler or Schmitt trigger. Use Value: Absorbs ±15 kV contact ESD (IEC 61000-4-2) and 4 kV EFT bursts while maintaining <1 µA leakage at 24 V nominal. |
| LED Lighting Driver Protection | USB-C Power Delivery Line Protection |
Use Scenario: Constant-current LED drivers in automotive headlamps subjected to alternator ripple and ignition noise. IC Role / Device Role: Parallel-connected TVS across driver output to clamp inductive kickback from LED string disconnection. Use Value: Withstands 600 W pulses without degradation, ensuring lamp module longevity and preventing MOSFET avalanche failure. |
Use Scenario: VBUS line in USB-C receptacles exposed to hot-plug transients and accidental 20 V PD negotiation faults. IC Role / Device Role: Bidirectional clamping device between VBUS and GND, upstream of buck converter and port controller. Use Value: Clamps fault voltage to 13.3 V within <1 ps, preventing overvoltage damage to USB-PD PHY and power switches. |
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 SMAJ7.0A | Unidirectional only; VF = 3.5 V; slightly higher VC = 13.7 V @ 45.5 A; same DO-214AC (SMA) footprint but smaller thermal mass. | Requires explicit polarity orientation; less suitable for AC-coupled or floating buses. | Select when unidirectional protection suffices and board space constraints favor SMA package. |
| ON Semiconductor SMCJ7.0A | Unidirectional; higher PPK = 1500 W; larger DO-214AB (SMC) package; VC = 13.4 V @ 113 A; TJ max = 175 °C. | Over-specified for 600 W needs; requires PCB rework due to larger pad layout and height. | Choose only if legacy designs already use SMC footprint or require >1 kW surge margin. |
Compared with SMAJ7.0A and SMCJ7.0A, the SMBJ7.0CH provides verified bidirectional operation in the compact DO-214AA (SMB) package, lower clamping voltage, and AEC-Q101 certification - making it optimal for space-constrained automotive and industrial applications requiring polarity-agnostic surge immunity.
Availability
SMBJ7.0CH is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, LED lighting drivers, and USB-C power delivery systems requiring stable component supply across extended temperature and lifecycle requirements.
Supply support for SMBJ7.0CH 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and automotive-qualified components.
The SMBJH series was developed specifically for AEC-Q101-compliant transient suppression in 12 V/24 V automotive and industrial power systems, emphasizing low clamping voltage, bidirectional symmetry, and robust moisture resistance.
FAQ
What is the polarity configuration of SMBJ7.0CH?
The SMBJ7.0CH is a bidirectional TVS diode - it has no designated anode or cathode and functions identically in both voltage polarities. This eliminates orientation errors during automated placement and simplifies design for AC-coupled or floating signal paths. Unlike unidirectional variants (e.g., SMBJ7.0H), the "CH" suffix explicitly denotes bipolar capability, confirmed in TSC's ordering information and electrical specifications tables.
Does SMBJ7.0CH meet automotive qualification standards?
Yes, SMBJ7.0CH is AEC-Q101 qualified and tested per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms. Its construction includes glass passivation, MSL Level 1 moisture resistance, and 150 °C maximum junction temperature - all validated for under-hood and chassis-mounted automotive applications. Certification documentation is available upon request from Taiwan Semiconductor.
What is the maximum clamping voltage of SMBJ7.0CH under surge conditions?
The SMBJ7.0CH has a maximum clamping voltage (VC) of 13.3 V when subjected to a 10/1000 µs surge current of 47 A. This value is measured per ANSI/IEEE C62.35 and represents the worst-case voltage imposed on protected circuitry during standardized transient events - critical for ensuring downstream ICs (e.g., CAN transceivers or microcontrollers) remain within absolute maximum ratings.
Can SMBJ7.0CH replace SMBJ7.0H in an existing design?
Yes, SMBJ7.0CH can replace SMBJ7.0H in most cases, but only if bidirectional clamping is required or acceptable. While both share identical VWM (7.0 V), VBR (7.78–9.51 V), and PPK (600 W), the SMBJ7.0H is unidirectional and requires correct polarity placement. Using SMBJ7.0CH in its place introduces symmetrical clamping - beneficial for floating nodes but unnecessary for DC-rail-only protection. No PCB changes are needed as both use DO-214AA (SMB) package.
What is the leakage current specification for SMBJ7.0CH at rated stand-off voltage?
At its 7.0 V working stand-off voltage (VWM), the SMBJ7.0CH exhibits a maximum blocking leakage current (ID) of 1 µA at 25 °C - verified per TSC's electrical specifications table. This ultra-low leakage minimizes quiescent power loss in battery-powered systems and prevents false triggering in high-impedance sensing circuits, such as those found in automotive LIN bus nodes or industrial analog front-ends.
SMBJ7.0CH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJH
- 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:
- 13.3V
- Current - Peak Pulse (10/1000µs):
- 47A
- 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 (SMB)
SMBJ7.0CH FAQ
1.How can I place an order for SMBJ7.0CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ7.0CH 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 SMBJ7.0CH reliable?
The price and inventory of SMBJ7.0CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ7.0CH is usually 5 days.
3.What payment methods are accepted for SMBJ7.0CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ7.0CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ7.0CH?
SMBJ7.0CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ7.0CH 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 SMBJ7.0CH?
For technical support, including SMBJ7.0CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ7.0CH requirements.
6.How does Aetrix verify that SMBJ7.0CH is sourced from the original manufacturer or authorized distributors?
All SMBJ7.0CH 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 SMBJ7.0CH meets industry standards.
7.What is the process for return or replacement of SMBJ7.0CH?
All SMBJ7.0CH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ7.0CH, 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 SMBJ7.0CH part is unused and in its original packaging.
Return procedure for SMBJ7.0CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ7.0CH Tags
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