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Vishay General Semiconductor - Diodes Division SMBJ110CAHM3/I
- Part No.:
- SMBJ110CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ110CAHM3/I.pdf
- Description:
- TVS DIODE 110VWM 177VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,661
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Product details
Overview
SMBJ110CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 110 V stand-off voltage (VWM), 122–135 V breakdown voltage (VBR) at 1 mA, 177 V maximum clamping voltage (VC) at 3.4 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, sensor interfaces, and industrial I/O circuits against ESD and inductive switching surges.
For engineers reviewing the SMBJ110CAHM3/I datasheet, SMBJ110CAHM3/I pinout, SMBJ110CAHM3/I application, or SMBJ110CAHM3/I equivalent, this device is selected for robust bidirectional surge protection where low-profile mounting, AEC-Q101 qualification (via HM3 suffix), halogen-free RoHS compliance, and stable clamping under repetitive 0.01% duty cycle transients are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance regardless of transient polarity. Its glass-passivated junction ensures consistent avalanche behavior and low incremental surge resistance, while the SMB package supports automated placement and meets MSL Level 1 per J-STD-020 with 260 °C peak reflow tolerance.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W. It exhibits ≤1.0 µA reverse leakage at VWM = 110 V and maintains clamping stability over temperature via a VBR temperature coefficient of 0.107 %/°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 110 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin for 110 V nominal DC bus or AC peak lines. |
| VBR (min/max) | 122 V / 135 V at IT = 1 mA - Confirmed breakdown range ensures reliable triggering above normal operating voltage but below system insulation limits. |
| VC @ IPPM | 177 V at 3.4 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs or MOSFETs. |
| PPPM | 600 W - Peak pulse power handling capability with 0.01% duty cycle; enables protection against high-energy lightning-induced or inductive-switching transients. |
| IPPM | 3.4 A - Peak pulse current corresponding to VC; used with PCB trace impedance and source impedance to model actual clamping behavior. |
| TJ max | +150 °C - Maximum junction temperature; supports operation in under-hood automotive or enclosed industrial environments without derating. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.21 mm × 4.06 mm footprint and 2.20 mm height; compatible with standard SMT assembly and IPC-7351B land patterns. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical terminals function as interchangeable anode/cathode pair depending on transient polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Interchangeable terminal; conducts during positive or negative transients relative to the other terminal - no fixed polarity assignment. |
| Terminal 2 | Anode/Cathode (bidirectional) | Interchangeable terminal; forms symmetrical clamping path with Terminal 1 - enables placement across any two-point voltage node without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses, or floating sensor inputs without external polarity management. |
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients common in motor drives, relay coils, and telecom line surges without degradation. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive electronics including body control modules, infotainment power rails, and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for industrial, medical, and consumer end equipment with strict material restrictions. |
| MSL Level 1, 260 °C peak reflow | Supports lead-free reflow soldering without moisture sensitivity concerns - eliminates bake preconditioning in production. |
Applications
| Industrial Motor Drive I/O Protection | Automotive Body Control Module (BCM) Power Rails |
|---|---|
|
Use Scenario: Protecting digital input/output lines connected to contactors, solenoids, or encoders subject to inductive kickback up to 1 kV. IC Role / Device Role / Timing Role: Bidirectional TVS placed across I/O pins to clamp both positive and negative transients before they reach microcontroller GPIO or level-shifter ICs. Use Value: Limits voltage excursion to ≤177 V during 3.4 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V logic interfaces. |
Use Scenario: Safeguarding 12 V supply inputs to BCM ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and jump-start transients. IC Role / Device Role / Timing Role: Primary clamping device on main power rail, coordinated with upstream fuses and downstream LDOs to manage energy dissipation. Use Value: Withstands 600 W pulses and operates up to +150 °C, enabling reliable protection in engine bay-mounted units without thermal derating. |
| Telecom Line Interface Protection | Consumer Appliance Sensor Signal Conditioning |
|
Use Scenario: Shielding RS-485 or Ethernet PHY signal pairs from lightning-induced surges in outdoor network equipment. IC Role / Device Role / Timing Role: Differential-mode TVS mounted across twisted-pair lines to suppress common-mode transients before reaching isolation transformers or transceivers. Use Value: Symmetrical 122–135 V VBR ensures balanced clamping on both lines, preserving signal integrity and minimizing skew during surge events. |
Use Scenario: Guarding analog outputs of temperature/humidity sensors in smart home appliances against ESD and board-level coupling noise. IC Role / Device Role / Timing Role: Localized TVS at sensor connector or ADC input to absorb 8 kV HBM ESD strikes and fast-rising capacitive discharge transients. Use Value: Sub-1 µA leakage at 110 V VWM avoids loading low-current sensor outputs, while 177 V VC prevents ADC overvoltage saturation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ110CAHE3/I | Same electrical specs and SMB package, but RoHS-compliant commercial grade (not AEC-Q101 qualified); uses standard tin plating instead of whisker-tested matte tin. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive qualification requirements and full lifecycle traceability is not needed. |
| SMAJ110CAHM3 | Lower 400 W PPPM, same VWM/VC, but in smaller SMA (DO-214AC) package - 20% smaller footprint and higher thermal resistance (RθJA = 140 °C/W). | Reduced surge energy handling; limited to lower-duty-cycle or lower-energy threat environments. | Choose only if board space is constrained and transient energy remains within 400 W limit - verify thermal margin with layout. |
Compared with SMBJ110CAHE3/I, the SMBJ110CAHM3/I adds AEC-Q101 qualification and whisker-resistant terminations for automotive use; versus SMAJ110CAHM3, it delivers 50% higher surge power handling and superior thermal performance in the same production-ready SMB footprint.
Availability
SMBJ110CAHM3/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom line interfaces, and consumer appliance sensor protection requiring stable component supply and long-term manufacturability.
Supply support for SMBJ110CAHM3/I 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and power MOSFETs with emphasis on reliability, ruggedness, and application-specific validation.
The SMBJ series was developed for high-energy transient suppression in space-constrained, high-reliability applications - particularly targeting automotive, industrial automation, and infrastructure equipment where consistent clamping and AEC-Q101 compliance are mandatory.
FAQ
What does the "CA" suffix indicate in SMBJ110CAHM3/I?
The "CA" suffix in SMBJ110CAHM3/I denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBJ110AHM3/I), it has no cathode marking and functions identically regardless of polarity applied across its terminals, making it ideal for AC lines, differential signals, and floating nodes.
Is SMBJ110CAHM3/I suitable for automotive applications?
Yes, SMBJ110CAHM3/I is AEC-Q101 qualified (confirmed by the "HM3" suffix), halogen-free, and RoHS-compliant - meeting key requirements for automotive electronics. It is validated for use in body control modules, infotainment power supplies, and sensor interfaces where operation up to +150 °C and resistance to mechanical shock, thermal cycling, and humidity are essential.
What is the maximum clamping voltage of SMBJ110CAHM3/I under surge conditions?
The maximum clamping voltage (VC) of SMBJ110CAHM3/I is 177 V, measured at its peak pulse current (IPPM) of 3.4 A using the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during worst-case transient events and must be compared against the absolute maximum ratings of downstream components like microcontrollers or transceivers.
How does the SMB package of SMBJ110CAHM3/I compare to SMA or SMC in terms of thermal performance?
The SMB (DO-214AA) package of SMBJ110CAHM3/I offers better thermal performance than SMA (DO-214AC), with RθJA = 100 °C/W versus ~140 °C/W, due to larger copper pad area and lower junction-to-lead resistance (RθJL = 20 °C/W). Compared to SMC (DO-214AB), SMB provides a balance of compact size and adequate power handling - supporting 600 W surges without requiring oversized heatsinking in typical 2-layer PCB layouts.
Can SMBJ110CAHM3/I replace SMBJ110A in a design?
No - SMBJ110CAHM3/I is bidirectional, while SMBJ110AHM3/I is unidirectional and includes a cathode band. Substituting them requires verifying circuit topology: unidirectional types require correct polarity alignment and cannot protect against reverse-polarity transients, whereas SMBJ110CAHM3/I clamps both polarities inherently. Layout changes and functional validation are mandatory before replacement.
SMBJ110CAHM3/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 110V
- Voltage - Breakdown (Min):
- 122V
- Voltage - Clamping (Max) @ Ipp:
- 177V
- Current - Peak Pulse (10/1000µs):
- 3.4A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ110CAHM3/I FAQ
1.How can I place an order for SMBJ110CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ110CAHM3/I 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 SMBJ110CAHM3/I reliable?
The price and inventory of SMBJ110CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ110CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMBJ110CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ110CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ110CAHM3/I?
SMBJ110CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ110CAHM3/I 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 SMBJ110CAHM3/I?
For technical support, including SMBJ110CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ110CAHM3/I requirements.
6.How does Aetrix verify that SMBJ110CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ110CAHM3/I 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 SMBJ110CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMBJ110CAHM3/I?
All SMBJ110CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ110CAHM3/I, 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 SMBJ110CAHM3/I part is unused and in its original packaging.
Return procedure for SMBJ110CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ110CAHM3/I Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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