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Vishay General Semiconductor - Diodes Division SMAJ110CAHM3/H
- Part No.:
- SMAJ110CAHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ110CAHM3/H.pdf
- Description:
- TVS DIODE 110VWM 177VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,338
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Product details
Overview
SMAJ110CAHM3/H from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection on signal and power lines. It features a 110 V standoff voltage (VWM), 122–135 V breakdown range (VBR at 1 mA), 177 V maximum clamping voltage (VC) at 1.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the SMAJ110CAHM3/H datasheet, SMAJ110CAHM3/H pinout, SMAJ110CAHM3/H application, or SMAJ110CAHM3/H equivalent, this device delivers AEC-Q101-qualified surge immunity, low incremental surge resistance, and MSL Level 1 moisture sensitivity - critical for high-reliability board-level ESD and lightning-induced transient suppression in harsh environments.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures stable breakdown behavior and fast response (<1 ps), while the DO-214AC package supports automated SMT placement and meets UL 94 V-0 flammability requirements.
The device is rated for 150 °C maximum junction temperature, exhibits 0.107 %/°C temperature coefficient of VBR, and delivers 1.7 A peak pulse current (IPPM) under standardized 10/1000 μs transients - derated above 25 °C per thermal curves in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 110 V - maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 100 V nominal systems. |
| VBR (min/max) | 122 V / 135 V at 1 mA - verified breakdown threshold range ensuring consistent turn-on during transients. |
| VC @ IPPM | 177 V at 1.7 A - clamping voltage limits downstream IC stress during 400 W surge events. |
| PPPM | 400 W (10/1000 μs) - peak transient energy handling capacity suitable for IEC 61000-4-5 Level 3/4 surges. |
| IFSM | 40 A - single half-sine surge current rating (8.3 ms), supporting inductive load switching protection. |
| TJ max | 150 °C - enables operation in under-hood automotive and industrial ambient conditions. |
| Package | SMA (DO-214AC) - surface-mount footprint (5.28 mm × 4.50 mm) compatible with standard reflow profiles and J-STD-020 MSL Level 1. |
Pinout & Package
SMAJ110CAHM3/H uses the SMA (DO-214AC) package: a two-terminal, bidirectional surface-mount device with no polarity marking. The case is molded epoxy meeting UL 94 V-0; terminals are matte tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No functional distinction - either terminal serves as anode or cathode depending on transient polarity; enables AC-coupled line protection without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces per stress test requirements. |
| 400 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges up to 400 W (10/1000 μs), enabling single-device protection for 24 V/48 V industrial buses. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Ensures tight voltage limiting relative to breakdown - reduces risk of latch-up or gate oxide damage in protected MOSFETs and microcontrollers. |
| MSL Level 1, 260 °C peak reflow | Supports lead-free assembly without preconditioning; eliminates moisture-related popcorning during standard SMT reflow. |
| Glass passivated junction | Provides stable leakage performance (<1 μA at VWM) and long-term reliability under thermal cycling and humidity exposure. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN FD and LIN bus transceivers from load dump and ISO 7637-2 pulses in vehicle body control modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point to shunt transients before reaching PHY layer. Use Value: Clamps 177 V surges at 1.7 A while maintaining <1 μA leakage at 110 V - preserving signal integrity and preventing false triggering in 12 V/24 V systems. |
Use Scenario: Safeguarding analog input channels (4–20 mA, 0–10 V) in programmable logic controllers exposed to field wiring induced surges. IC Role / Device Role / Timing Role: Primary front-end TVS on terminal blocks and signal conditioning PCBs to absorb repetitive switching transients from solenoids and contactors. Use Value: 400 W pulse rating and 150 °C junction rating allow sustained operation in cabinet-mounted enclosures with elevated ambient temperatures. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Secondary-side surge protection on Ethernet PHY power rails and RS-485 data lines in base station remote units. IC Role / Device Role / Timing Role: Fast-response clamp suppressing EFT/burst noise and lightning-induced common-mode surges on isolated DC bias lines. Use Value: Sub-nanosecond response time and symmetrical VBR ensure balanced clamping on differential pairs without skew or offset distortion. |
Use Scenario: Input-stage transient suppression on universal AC/DC adapters handling 100–240 VAC mains with internal rectification. IC Role / Device Role / Timing Role: Standoff-rated TVS across bulk capacitor inputs to limit overvoltage during MOV failure or lightning coupling. Use Value: 110 V VWM provides sufficient margin above 100 VDC rectified peak while clamping to 177 V - preventing electrolytic capacitor overvoltage rupture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ110CAHE3/H | RoHS-compliant, commercial-grade variant without halogen-free certification; same electrical specs and AEC-Q101 qualification. | Approved for non-automotive industrial use where halogen-free compliance is not mandated by end-equipment standards. | Select when cost optimization is prioritized and halogen-free material declaration is not required by OEM specifications. |
| SMBJ110CAHM3 | Same VWM/VC ratings but in SMB (DO-214AA) package - 20 % larger footprint and higher thermal resistance (RθJA = 100 °C/W vs. 120 °C/W). | Better suited for higher-power derating scenarios or legacy layouts accommodating SMB's 4.57 mm × 3.94 mm outline. | Choose only if existing PCB land pattern matches SMB, or when higher surge current margin (2.2 A IPPM) is needed despite larger area. |
Compared with SMAJ110CAHE3/H, the SMAJ110CAHM3/H adds halogen-free compliance without sacrificing AEC-Q101 qualification or clamping performance; versus SMBJ110CAHM3, it offers smaller board area and tighter layout compatibility at the expense of slightly lower thermal dissipation margin.
Availability
SMAJ110CAHM3/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, and telecom line protection requiring stable component supply across extended production lifecycles.
Supply support for SMAJ110CAHM3/H 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SMAJ series is engineered specifically for board-level transient suppression in space-constrained, high-surge environments - emphasizing AEC-Q101 qualification, low clamping voltage, and automated manufacturability in DO-214AC packages.
FAQ
What does the 'HM3' suffix indicate in SMAJ110CAHM3/H?
The 'HM3' suffix in SMAJ110CAHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It specifies matte tin-plated leads, JESD 201 Class 2 whisker resistance, and compliance with Vishay's material categorization standard for environmentally restricted substances - distinct from 'HE3' (RoHS + AEC-Q101 but not halogen-free) and 'E3' (commercial RoHS only).
Is SMAJ110CAHM3/H suitable for protecting 100 VDC power rails?
Yes, SMAJ110CAHM3/H is explicitly rated for 110 V standoff voltage (VWM), providing a 10 % safety margin above 100 VDC nominal rails. Its 122–135 V breakdown range and 177 V clamping voltage ensure reliable conduction during overvoltage events while maintaining <1 μA leakage at rated VWM, making it appropriate for regulated DC bus protection in industrial and telecom equipment.
Does SMAJ110CAHM3/H require orientation during PCB placement?
No, SMAJ110CAHM3/H is a bidirectional TVS diode with symmetrical terminal structure - there is no anode/cathode distinction or polarity marking on the SMA (DO-214AC) package. Either terminal may be connected to either side of the protected line, simplifying automated placement and eliminating orientation errors in high-volume manufacturing.
How does the 400 W peak pulse power rating of SMAJ110CAHM3/H translate to real-world surge immunity?
The 400 W rating for SMAJ110CAHM3/H is defined per the 10/1000 μs double-exponential waveform (IEC 61000-4-5), corresponding to a 1.7 A peak current at 177 V clamping. In practice, this enables protection against Level 3 (1 kV/42 Ω) and Level 4 (2 kV/12 Ω) surges on 24 V/48 V systems when properly laid out with low-inductance grounding - validated in Vishay's application notes for automotive and industrial transients.
Can SMAJ110CAHM3/H replace SMAJ110A in a design?
No - SMAJ110A is unidirectional with cathode band marking and forward voltage drop (~3.5 V at 25 A), while SMAJ110CAHM3/H is bidirectional with symmetrical characteristics and no polarity. Substituting them requires verifying circuit topology: SMAJ110CAHM3/H is mandatory for AC-coupled or floating lines; SMAJ110A applies only to DC-biased, polarity-defined paths like power supply inputs.
SMAJ110CAHM3/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- 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):
- 1.7A
- Power - Peak Pulse:
- 400W
- 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-214AC (SMA)
SMAJ110CAHM3/H FAQ
1.How can I place an order for SMAJ110CAHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ110CAHM3/H 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 SMAJ110CAHM3/H reliable?
The price and inventory of SMAJ110CAHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ110CAHM3/H is usually 5 days.
3.What payment methods are accepted for SMAJ110CAHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ110CAHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ110CAHM3/H?
SMAJ110CAHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ110CAHM3/H 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 SMAJ110CAHM3/H?
For technical support, including SMAJ110CAHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ110CAHM3/H requirements.
6.How does Aetrix verify that SMAJ110CAHM3/H is sourced from the original manufacturer or authorized distributors?
All SMAJ110CAHM3/H 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 SMAJ110CAHM3/H meets industry standards.
7.What is the process for return or replacement of SMAJ110CAHM3/H?
All SMAJ110CAHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ110CAHM3/H, 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 SMAJ110CAHM3/H part is unused and in its original packaging.
Return procedure for SMAJ110CAHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ110CAHM3/H Tags
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