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Taiwan Semiconductor Corporation SMBJ110CH
- Part No.:
- SMBJ110CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ110CH.pdf
- Description:
- 600W, 135.5V, 10%, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,917
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Product details
Overview
SMBJ110CH from Taiwan Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy ESD and surge protection in automotive and industrial power rails. It features a 110V working stand-off voltage (VWM), 122–149V breakdown voltage (VBR), 196V maximum clamping voltage (VC) at 3.2A peak impulse current, and 600W peak pulse power rating with DO-214AA (SMB) package. 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 SMBJ110CH datasheet, SMBJ110CH pinout, SMBJ110CH application, or SMBJ110CH equivalent, key selection criteria include unidirectional vs. bidirectional configuration (CH = bidirectional), clamping performance under 10/1000µs transients, junction temperature derating above 25°C, and compliance with automotive EMC standards including electrical fast transient (EFT) immunity.
Technical Context
The SMBJ110CH implements a glass-passivated silicon junction optimized for low-leakage (<1 µA at 110V) and sub-1ps response time to transient overvoltages. Its bidirectional architecture enables symmetrical clamping in both polarities without external polarity management, supporting robust protection of differential buses and AC-coupled signal paths.
Thermally, it features a junction-to-case resistance (RθJC) of 10°C/W and junction-to-ambient (RθJA) of 55°C/W, enabling reliable operation up to 150°C junction temperature. The DO-214AA package supports automated placement and meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 110 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 122 / 149 V @ 1 mA - Guaranteed breakdown range defining turn-on threshold tolerance |
| VC @ IPP | 196 V @ 3.2 A - Clamped voltage during 10/1000µs surge, limiting downstream stress |
| PPK | 600 W - Peak pulse power handling per single 10/1000µs transient event |
| ID @ VWM | <1 µA - Low leakage preserves system efficiency and battery life in always-on circuits |
| TJ max | +150 °C - Enables deployment in under-hood automotive environments and industrial enclosures |
| Package | DO-214AA (SMB) - Standardized surface-mount footprint compatible with IPC-7351B land patterns |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, cathode band marking absent (bidirectional device); polarity is non-directional; weight ≈ 0.090 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional terminal pair | No polarity distinction - either terminal accepts positive or negative transients equally |
| Case | Non-electrical mechanical interface | Plastic body provides insulation and thermal path; no internal thermal pad or exposed metal slug |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards |
| ISO 7637-2 compliance | Withstands defined load-dump (Pulse 5a/b), inductive switching (Pulse 1/2a/2b), and EFT (Pulse 3a/3b) waveforms without degradation |
| Sub-1 ps response time | Clamps transients before sensitive ICs experience damaging overvoltage - critical for CAN, LIN, and sensor interfaces |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally compliant manufacturing |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow - simplifies SMT assembly and reduces process cost |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12V/24V vehicle power distribution networks from load dump and alternator transients. IC Role / Device Role / Timing Role: Primary clamping element placed upstream of DC-DC converters and microcontrollers. Use Value: Limits voltage to ≤196V during ISO 7637-2 Pulse 5a (load dump), preventing latch-up or burnout in downstream PMICs and MCUs. | Use Scenario: Safeguarding analog sensor inputs (e.g., pressure, temperature) in factory automation PLC modules. IC Role / Device Role / Timing Role: Front-end transient shunt on differential or single-ended sensor lines exposed to relay switching noise. Use Value: Sub-1ps response ensures clamping occurs before 10/1000µs EFT bursts exceed ADC input ratings, preserving measurement integrity. |
| LED Lighting Driver Protection | RS-485/RS-422 Bus Protection |
Use Scenario: Shielding constant-current LED drivers from inductive kickback when driving solenoid-based dimming circuits. IC Role / Device Role / Timing Role: Parallel-connected TVS across driver output terminals to absorb stored inductor energy. Use Value: 600W peak power rating handles repetitive 100V+ spikes from 100mH+ inductors without thermal runaway or parameter shift. | Use Scenario: Providing common-mode surge immunity on industrial serial communication lines routed through noisy factory floors. IC Role / Device Role / Timing Role: Bidirectional clamping device across A/B bus lines referenced to ground or shield. Use Value: Symmetrical VBR (122–149V) and VC (196V) ensure equal protection against +ve and –ve surges, maintaining data integrity during IEC 61000-4-5 tests. |
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 SMAJ110CA | Same DO-214AC (SMA) package; slightly higher VC (205V @ 3.1A); lower PPK (400W) | Lower power handling limits use in high-energy load-dump scenarios; suitable for space-constrained PCBs where SMB footprint is unavailable | Select when board area is constrained and surge energy is limited to <400W; verify layout clearance for SMA vs. SMB thermal dissipation |
| Vishay SMA6J110A | DO-214AC (SMA) package; bidirectional; VC = 191V @ 3.3A; AEC-Q101 qualified; same 600W rating | Identical clamping performance but smaller package - requires adjusted pad layout and may exhibit higher RθJA (65°C/W) | Prefer for new designs targeting footprint reduction; confirm thermal margin with RθJA derating curves under actual airflow conditions |
Compared with SMAJ110CA and SMA6J110A, the SMBJ110CH offers superior thermal performance (RθJA = 55°C/W vs. ≥65°C/W) and larger DO-214AA footprint for enhanced solder joint reliability in high-vibration automotive environments.
Availability
SMBJ110CH is available at Aetrix Electronics and suitable for automotive infotainment power supplies, industrial PLC I/O modules, LED driver front-ends, and RS-485 communication interfaces requiring stable component supply across extended production lifecycles.
Supply support for SMBJ110CH 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 bipolar transistors.
The SMBJH series was developed specifically for AEC-Q101-compliant automotive and harsh-environment industrial applications demanding high-reliability transient suppression with validated ISO 7637-2 immunity and low-leakage performance.
FAQ
What does the 'CH' suffix indicate in SMBJ110CH?
The 'CH' suffix in SMBJ110CH denotes a bidirectional configuration - meaning the device clamps transient overvoltages symmetrically in both polarities without requiring orientation during placement. Unlike unidirectional variants (e.g., SMBJ110H), SMBJ110CH has no cathode band marking and functions identically regardless of terminal connection direction, making it ideal for AC-coupled or differential signal protection.
Is SMBJ110CH suitable for ISO 7637-2 Pulse 5a (load dump) protection?
Yes, SMBJ110CH is explicitly rated to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b, and its 600W peak pulse power rating and 196V clamping voltage at 3.2A make it appropriate for moderate-energy load dump events. For full Pulse 5a compliance (up to 60V superimposed on 14V system), pairing SMBJ110CH with a higher-voltage TVS or using it in conjunction with a dedicated load-dump suppressor is recommended based on system-level testing.
What is the maximum junction temperature and thermal resistance of SMBJ110CH?
The SMBJ110CH 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 enable reliable operation in under-hood automotive environments and sealed industrial enclosures, provided PCB copper area and airflow align with the manufacturer's derating curves in Figure 2 of the datasheet.
Does SMBJ110CH require moisture preconditioning before reflow soldering?
No, SMBJ110CH has a moisture sensitivity level (MSL) of 1 per J-STD-020, meaning it is not humidity-sensitive and can be stored indefinitely at ambient conditions without baking or dry-pack requirements. This eliminates pre-reflow bake steps, reducing manufacturing cost and cycle time in high-volume SMT assembly lines.
How does SMBJ110CH compare to unidirectional SMBJ110H in terms of clamping behavior?
SMBJ110CH clamps symmetrically in both directions with identical VBR (122–149V) and VC (196V) specifications, while SMBJ110H clamps only in reverse bias and conducts forward current like a standard diode. In applications with bidirectional transients - such as RS-485 buses or AC-coupled sensors - SMBJ110CH avoids the need for dual-diode configurations, simplifying layout and improving consistency versus SMBJ110H, which would require careful polarity alignment and cannot protect forward-polarity surges.
SMBJ110CH 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):
- 110V
- Voltage - Breakdown (Min):
- 122V
- Voltage - Clamping (Max) @ Ipp:
- 196V
- Current - Peak Pulse (10/1000µs):
- 3.2A
- 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)
SMBJ110CH FAQ
1.How can I place an order for SMBJ110CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ110CH 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 SMBJ110CH reliable?
The price and inventory of SMBJ110CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ110CH is usually 5 days.
3.What payment methods are accepted for SMBJ110CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ110CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ110CH?
SMBJ110CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ110CH 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 SMBJ110CH?
For technical support, including SMBJ110CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ110CH requirements.
6.How does Aetrix verify that SMBJ110CH is sourced from the original manufacturer or authorized distributors?
All SMBJ110CH 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 SMBJ110CH meets industry standards.
7.What is the process for return or replacement of SMBJ110CH?
All SMBJ110CH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ110CH, 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 SMBJ110CH part is unused and in its original packaging.
Return procedure for SMBJ110CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ110CH Tags
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