My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ110AHM3/I
- Part No.:
- SMAJ110AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ110AHM3/I.pdf
- Description:
- TVS DIODE 110VWM 177VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,864
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ110AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. 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 1.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform.
For engineers reviewing the SMAJ110AHM3/I datasheet, SMAJ110AHM3/I pinout, SMAJ110AHM3/I application, or SMAJ110AHM3/I equivalent, this device serves as a robust, AEC-Q101-qualified transient protection solution for automotive power line and signal line interfaces where fast response (<1 ns), low clamping ratio, and stable thermal performance up to +150 °C junction temperature are required.
Technical Context
The SMAJ110AHM3/I operates as a unidirectional avalanche diode, conducting only when reverse voltage exceeds its breakdown threshold, thereby shunting surge energy to ground. Its glass-passivated junction ensures stable leakage and long-term reliability under repetitive transient stress, while its MSL Level 1 rating supports lead-free reflow compatibility up to 260 °C peak.
Thermal design relies on low RθJA = 120 °C/W (typ.) and RθJL = 30 °C/W (typ.), enabling effective heat dissipation when mounted on 0.2" × 0.2" copper pads per terminal. The device's 0.057 %/°C temperature coefficient of VBR ensures predictable voltage drift across its -55 °C to +150 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 110 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 122–135 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering without premature conduction. |
| VC (Clamping Voltage) | 177 V at IPPM = 1.7 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines downstream component stress. |
| PPPM (Peak Pulse Power) | 400 W - Surge energy handling capability under standard 10/1000 μs waveform; derates to 300 W above 78 V per spec. |
| IFSM (Surge Current) | 40 A - Single half-sine 8.3 ms forward surge rating (unidirectional only); validates robustness against inrush events. |
| TJmax | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and industrial power supplies. |
| Package | SMA (DO-214AC) - Low-profile, surface-mount package with matte tin-plated leads; compatible with automated placement and J-STD-002 soldering. |
Pinout & Package
Package: SMA (DO-214AC), molded case with cathode band marking; polarity-sensitive unidirectional configuration; terminals are anode and cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side (protected circuit input) | Connected to the line or signal trace requiring transient protection; referenced to system ground via cathode path. |
| Cathode | Ground reference / clamping node | Connected to system ground or low-impedance return path; conducts surge current to ground when VRM exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control units and ADAS power rails. |
| 400 W peak pulse power (10/1000 μs) | Provides high-energy transient suppression without sacrificing board space - critical for CAN/LIN bus lines and 12 V/24 V supply inputs. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage exposure to downstream ICs - protects 120 V-rated MOSFETs and microcontrollers with tight VDD margins. |
| MSL Level 1, 260 °C peak reflow | Enables single-pass lead-free assembly without moisture sensitivity concerns - eliminates pre-bake requirements in high-volume SMT lines. |
| Glass passivated junction | Ensures stable leakage current (<1 μA at VWM) and long-term parameter stability under thermal and humidity stress - improves field lifetime in industrial controls. |
Applications
| Automotive Power Line Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp surges >110 V. Use Value: Limits peak voltage to 177 V during 400 W transients, preventing damage to 130 V-rated DC-DC converters and MCU power inputs. |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in factory automation systems from EMI-induced spikes. IC Role / Device Role / Timing Role: Low-capacitance TVS on differential signal pairs to suppress sub-100 ns transients without distorting signal integrity. Use Value: Clamps 1.7 A surges within <1 ns while maintaining <1 μA leakage at 110 V - preserves 16-bit ADC accuracy and noise floor. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Safeguarding PoE-powered network switches against lightning-induced common-mode surges on 48 V DC input. IC Role / Device Role / Timing Role: Primary-level TVS on input bulk capacitor rail to absorb repetitive 10/1000 μs transients. Use Value: Handles 400 W pulses with 120 °C/W thermal resistance - sustains operation under 50 °C ambient with minimal derating. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances (e.g., vacuum cleaners, blenders). IC Role / Device Role / Timing Role: Unidirectional TVS across motor terminals to clamp flyback voltage during PWM switching. Use Value: Withstands 40 A 8.3 ms half-sine surges and 150 °C junction temperature - survives repeated motor stall conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ110AHE3/I | RoHS-compliant commercial grade (non-AEC-Q101); identical electrical specs and SMA package. | Lacks automotive qualification; not recommended for under-hood or safety-critical modules. | Select when cost-sensitive consumer or industrial designs require same clamping performance without automotive validation. |
| SMBJ110A-M3/5A | Same VWM/VC but in larger SMB (DO-214AA) package; 600 W PPPM; higher IPPM (2.8 A). | Better surge endurance for high-energy environments; requires larger PCB footprint and different pad layout. | Choose when system-level surge testing exceeds 400 W or when thermal margin must be increased beyond SMA limits. |
Compared with SMAJ110AHM3/I, SMAJ110AHE3/I offers identical protection performance at lower qualification cost, while SMBJ110A-M3/5A trades compact size for higher surge capacity - selection depends on automotive compliance needs and board area constraints.
Availability
SMAJ110AHM3/I is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and telecom DC input surge suppression requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMAJ110AHM3/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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-reliability transient suppression in automotive, industrial, and telecom systems - delivering consistent clamping performance, AEC-Q101 validation, and robust thermal behavior in compact surface-mount packages.
FAQ
What is the clamping voltage of the SMAJ110AHM3/I under a 10/1000 μs surge?
The SMAJ110AHM3/I has a maximum clamping voltage (VC) of 177 V at 1.7 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per JEDEC test conditions and reflects the highest voltage imposed on the protected circuit during transient events - critical for ensuring downstream components remain within their absolute maximum ratings. The SMAJ110AHM3/I maintains this clamping performance across its full operating temperature range.
Is the SMAJ110AHM3/I qualified for automotive applications?
Yes, the SMAJ110AHM3/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" (halogen-free, RoHS-compliant, and AEC-Q101 qualified). This qualification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, making the SMAJ110AHM3/I suitable for engine control units, body electronics, and ADAS power domains where reliability under harsh environmental conditions is mandatory.
What is the difference between SMAJ110AHM3/I and SMAJ110AHE3/I?
The SMAJ110AHM3/I and SMAJ110AHE3/I share identical electrical specifications - including VWM = 110 V, VBR = 122–135 V, and VC = 177 V - but differ in qualification and material composition. SMAJ110AHM3/I is halogen-free and AEC-Q101 qualified; SMAJ110AHE3/I is RoHS-compliant but commercial-grade only. Both use the same SMA (DO-214AC) package and matte tin-plated leads, but only SMAJ110AHM3/I meets automotive reliability standards.
What is the thermal resistance of the SMAJ110AHM3/I, and how does it affect PCB layout?
The SMAJ110AHM3/I has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W, measured on 0.2" × 0.2" copper pads per terminal. To maintain safe junction temperatures under 400 W surges, PCB layout must provide adequate copper area and minimize thermal bottlenecks - especially important in automotive applications where ambient temperatures exceed 85 °C. The SMAJ110AHM3/I's MSL Level 1 rating also permits direct placement into lead-free reflow without pre-baking.
Can the SMAJ110AHM3/I be used for bidirectional transient protection?
No, the SMAJ110AHM3/I is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. It conducts only in reverse bias above VBR and blocks forward current like a standard diode. For bidirectional protection - such as AC lines or differential data buses - a part with "CA" suffix (e.g., SMAJ110CA) is required. Using SMAJ110AHM3/I in bidirectional configurations risks forward conduction and failure during positive transients.
SMAJ110AHM3/I 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMAJ110AHM3/I FAQ
1.How can I place an order for SMAJ110AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ110AHM3/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 SMAJ110AHM3/I reliable?
The price and inventory of SMAJ110AHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ110AHM3/I is usually 5 days.
3.What payment methods are accepted for SMAJ110AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ110AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ110AHM3/I?
SMAJ110AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ110AHM3/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 SMAJ110AHM3/I?
For technical support, including SMAJ110AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ110AHM3/I requirements.
6.How does Aetrix verify that SMAJ110AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMAJ110AHM3/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 SMAJ110AHM3/I meets industry standards.
7.What is the process for return or replacement of SMAJ110AHM3/I?
All SMAJ110AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ110AHM3/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 SMAJ110AHM3/I part is unused and in its original packaging.
Return procedure for SMAJ110AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ110AHM3/I Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
