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Taiwan Semiconductor Corporation SMBJ110AH
- Part No.:
- SMBJ110AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ110AH.pdf
- Description:
- TVS DIODE 110VWM 177VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,403
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Product details
Overview
SMBJ110AH from Taiwan Semiconductor is a unidirectional 600W surface-mount transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 110V working stand-off voltage (VWM), 122–135V breakdown voltage (VBR), and 177V maximum clamping voltage (VC) at 3.5A peak impulse current - designed for automotive-grade ESD and load-dump protection in power supply rails and signal lines.
For engineers reviewing the SMBJ110AH datasheet, SMBJ110AH pinout, SMBJ110AH application, or SMBJ110AH equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, AEC-Q101 qualification status, junction temperature derating above 25°C, and compatibility with automated SMT assembly on 1.27mm pitch PCBs.
Technical Context
The SMBJ110AH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 122–135V breakdown range at 1mA test current. It clamps transients to ≤177V within <1.0ps response time while sustaining up to 600W non-repetitive peak pulse power (10/1000µs waveform).
Thermal design relies on RθJC = 10°C/W and RθJA = 55°C/W, enabling operation from –55°C to +150°C junction temperature. Its glass-passivated junction and matte tin-plated leads meet J-STD-002 solderability and JESD 201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 110 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC/AC rail margin. |
| VBR min/max | 122 V / 135 V @ 1 mA - Breakdown threshold range; ensures reliable triggering across process variation. |
| VC @ IPP | 177 V @ 3.5 A - Clamped voltage during 10/1000µs surge; determines protected circuit's maximum transient stress. |
| PPK | 600 W - Peak pulse power handling per single 10/1000µs event; supports ISO 7637-2 Pulse 5a (load dump). |
| ID @ VWM | ≤1 µA - Reverse leakage at rated stand-off; negligible power loss in high-impedance monitoring circuits. |
| TJ max | +150 °C - Maximum junction temperature; enables under-hood automotive deployment without forced cooling. |
Pinout & Package
DO-214AA (SMB) surface-mount package: cathode-banded end (marked side) denotes the cathode terminal; anode is unmarked end. Case meets UL 94V-0 flammability rating and weighs 0.090g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward current entry / reverse voltage reference | Connected to lower-potential node (e.g., ground or return path); establishes polarity-sensitive clamping direction. |
| Cathode (banded end) | Avalanche conduction terminal | Connected to protected line (e.g., 12V rail); conducts surge current to ground when VREV > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements including HTOL, TCT, and ESD-HBM/MM, ensuring reliability in vehicle ECUs. |
| Glass passivated junction | Enhances long-term stability and moisture resistance vs. epoxy-passivated alternatives, critical for under-hood thermal cycling. |
| Clamping ratio VC/VBR | 1.31 typical (177V/135V) - Low ratio minimizes overvoltage exposure to downstream ICs during fast transients. |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (line impedance transients) - full vehicle-level EMC immunity. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery-supplied control module subjected to load-dump transients up to 120V for 400ms. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery input and DC-DC converter input to clamp surges before regulation stage. Use Value: Limits voltage seen by LM5008 regulator to ≤177V, preventing die damage and maintaining system uptime during alternator failure events. |
Use Scenario: RS-485 transceiver connected to long cables in factory automation exposed to EFT bursts (IEC 61000-4-4). IC Role / Device Role / Timing Role: Bidirectional protection (using SMBJ110AH's unidirectional variant in back-to-back configuration) across differential bus lines. Use Value: Suppresses 5kV/5kHz EFT pulses to <100Vpp at transceiver pins, preserving data integrity without signal distortion or latch-up. |
| LED Lighting Driver Input Protection | Motor Control Gate Drive Clamp |
Use Scenario: Constant-current LED driver powered from 24V industrial supply experiencing repetitive switching noise and inductive kickback. IC Role / Device Role / Timing Role: TVS mounted at input filter capacitor to absorb microsecond-scale spikes from nearby relay switching. Use Value: Prevents cumulative degradation of ON Semiconductor NCP3065 controller by limiting transient energy dissipation to <600W per event. |
Use Scenario: Half-bridge IGBT gate driver in HVAC blower motor encountering Miller-induced voltage spikes during high-di/dt switching. IC Role / Device Role / Timing Role: TVS placed between gate and emitter to clamp overshoot exceeding ±20V absolute rating of IR2110 driver. Use Value: Maintains gate oxide integrity by clamping spikes to ≤177V with sub-ns response, avoiding false turn-on or device destruction. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ110A | Same DO-214AC (SMA) package; 110V VWM, 177V VC @ 3.5A, but PPK = 400W (vs. SMBJ110AH's 600W). | Lower peak power rating limits suitability for ISO 7637-2 Pulse 5a (load dump); acceptable for ESD/EFT only. | Select SMAJ110A only if board space allows larger SMA footprint and surge energy is limited to ≤400W. |
| Vishay SMA6J110A | DO-214AC (SMA) package; identical 110V VWM and 177V VC, but AEC-Q101 not claimed and TJ max = +175°C. | Lacks automotive qualification evidence; higher TJ rating suits high-ambient industrial enclosures but requires validation for automotive use. | Prefer SMBJ110AH for AEC-Q101-compliant designs; consider SMA6J110A only for cost-sensitive non-automotive systems requiring extended temperature margin. |
Compared with SMAJ110A and SMA6J110A, the SMBJ110AH delivers higher 600W surge capacity in the smaller DO-214AA (SMB) footprint, maintains AEC-Q101 certification, and provides verified ISO 7637-2 compliance - making it the optimal choice for space-constrained automotive power rail protection where full load-dump immunity is required.
Availability
SMBJ110AH is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, LED lighting drivers, and motor control gate drive circuits requiring stable component supply with full AEC-Q101 traceability and ISO 7637-2 compliance.
Supply support for SMBJ110AH 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 power management devices since 1979.
The SMBJH series was developed specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 reliability, tight VBR tolerances, and robust clamping performance under standardized ISO 7637-2 surge waveforms.
FAQ
What is the polarity configuration of SMBJ110AH?
The SMBJ110AH is a unidirectional TVS diode, with cathode identified by a band on the DO-214AA (SMB) package. It conducts only when reverse voltage exceeds its breakdown range (122–135V), making it suitable for DC rail protection where polarity is fixed. Unlike bidirectional variants (e.g., SMBJ110CAH), SMBJ110AH must be oriented correctly in-circuit to function.
Does SMBJ110AH meet automotive qualification standards?
Yes, SMBJ110AH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements. This certification covers temperature cycling, humidity testing, and surge endurance - confirming suitability for under-hood and body-control module applications per automotive OEM specifications.
What is the maximum clamping voltage of SMBJ110AH under surge conditions?
The SMBJ110AH has a maximum clamping voltage (VC) of 177 V at 3.5 A peak impulse current (IPP), measured using the standard 10/1000 µs double-exponential waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events.
Can SMBJ110AH be used in bidirectional protection configurations?
While SMBJ110AH itself is unidirectional, it can be deployed in back-to-back (anode-to-anode) configuration with a second SMBJ110AH to achieve bidirectional clamping - commonly used for AC lines or differential buses. However, this doubles component count and PCB area versus a dedicated bidirectional part like SMBJ110CAH.
What is the thermal resistance profile of SMBJ110AH?
SMBJ110AH has a junction-to-case thermal resistance (RθJC) of 10°C/W and junction-to-ambient resistance (RθJA) of 55°C/W under standard JEDEC test conditions. These values enable thermal design for continuous power dissipation up to 3 W at 25°C ambient, with linear derating above that temperature per Figure 2 in the datasheet.
SMBJ110AH 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 110V
- Voltage - Breakdown (Min):
- 122V
- Voltage - Clamping (Max) @ Ipp:
- 177V
- Current - Peak Pulse (10/1000µs):
- 3.5A
- 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 (SMB)
SMBJ110AH FAQ
1.How can I place an order for SMBJ110AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ110AH 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 SMBJ110AH reliable?
The price and inventory of SMBJ110AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ110AH is usually 5 days.
3.What payment methods are accepted for SMBJ110AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ110AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ110AH?
SMBJ110AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ110AH 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 SMBJ110AH?
For technical support, including SMBJ110AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ110AH requirements.
6.How does Aetrix verify that SMBJ110AH is sourced from the original manufacturer or authorized distributors?
All SMBJ110AH 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 SMBJ110AH meets industry standards.
7.What is the process for return or replacement of SMBJ110AH?
All SMBJ110AH units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ110AH, 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 SMBJ110AH part is unused and in its original packaging.
Return procedure for SMBJ110AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ110AH Tags
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