My Inquiry
My Account
Semtech Corporation SMBJ110CA
- Part No.:
- SMBJ110CA
- Manufacturer:
- Semtech Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ110CA.pdf
- Description:
- 1-LINE 110V 3.4A TVS DO-214AA(SM
- Quantity:
- Payment:
- Shipping:
Inventory:3,218
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ110CA from Littelfuse is a bidirectional transient voltage suppression (TVS) diode designed for high-energy surge protection of DC power lines and signal interfaces operating up to 110 V DC. It delivers 400 W peak pulse power (8/20 µs), clamps at 179 V (IPP = 32.4 A), and maintains ≤1 µA reverse leakage at VRWM = 110 V. Used in industrial power supplies, telecom line cards, and automotive body electronics for IEC 61000-4-5 Level 4 compliance.
For engineers reviewing the SMBJ110CA datasheet, pinout, applications, or equivalent options, key selection criteria include its 110 V working voltage, 179 V clamping performance at 32.4 A, DO-214AA (SMC) package thermal robustness, and verified compliance with IEC 61000-4-2 ESD (±30 kV air/contact) and IEC 61000-4-5 surge standards.
Technical Context
The SMBJ110CA operates as a silicon avalanche diode with symmetrical bidirectional clamping action, triggered when transient voltage exceeds its breakdown threshold (VBR = 122–135 V). Its low dynamic impedance (ZPP ≈ 5.5 Ω) ensures stable clamping across temperature (–65°C to +150°C) and pulse current (up to 32.4 A, 8/20 µs).
Unlike active suppressors such as the Semtech TDS2211P, the SMBJ110CA relies on passive avalanche conduction without trigger circuitry or FET shunting-resulting in higher clamping voltage but zero latency, no bias requirements, and inherent fail-safe open-circuit behavior under end-of-life stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Working Voltage (VRWM) | 110 V - Maximum continuous DC or RMS voltage the device blocks without clamping; sets upper limit for protected bus operation. |
| Breakdown Voltage (VBR) | 122–135 V @ IT = 1 mA - Avalanche onset range; defines minimum overvoltage threshold before conduction begins. |
| Clamping Voltage (VC) | 179 V @ IPP = 32.4 A (8/20 µs) - Peak voltage seen by downstream circuit during worst-case surge; critical for IC voltage tolerance margining. |
| Peak Pulse Power (PPK) | 400 W (8/20 µs) - Energy-handling capacity; determines survivability against lightning-induced surges per IEC 61000-4-5. |
| Reverse Leakage (IR) | ≤1 µA @ 110 V, 25°C - Negligible standby power loss and signal integrity impact on high-impedance lines. |
| Package | DO-214AA (SMC) - Surface-mount, thermally efficient case with 2.5 mm creepage/clearance; supports >1.5 A steady-state current. |
Pinout & Package
Package: DO-214AA (SMC), 2-pin surface-mount case with cathode band marking. Cathode (K) is marked; anode (A) is unmarked. Designed for reflow soldering with JEDEC-standard thermal profile.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (K) | High-side connection point for bidirectional clamping | Connected to protected line; conducts surge current toward ground or opposing rail depending on polarity of transient. |
| Anode (A) | Low-side reference terminal | Typically tied to system ground or negative rail; completes conduction path during positive or negative transients. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Protects AC-coupled or floating DC lines (e.g., RS-485, CAN, PoE pairs) without polarity constraints. |
| IEC 61000-4-5 Level 4 compliance | Withstands ±4 kV surge (2 Ω source, 12/48 µs) - meets industrial and telecom immunity requirements out-of-box. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on downstream MOSFETs, controllers, or interface ICs compared to higher-ratio TVS devices. |
| Fail-open failure mode | Guarantees no short-circuit risk to protected circuit under end-of-life overstress - critical for safety-critical power rails. |
Applications
| Industrial Power Input Protection | Telecom Line Card Surge Suppression |
|---|---|
Use Scenario: 110 V DC input stage of programmable logic controller (PLC) power supply exposed to induced lightning surges on factory floor wiring. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed upstream of DC-DC converter input, absorbing 400 W transients before they reach sensitive regulation circuitry. Use Value: Limits peak voltage to 179 V, ensuring input capacitor and MOSFETs remain within 200 V rating while surviving repeated 4 kV surges per IEC 61000-4-5. |
Use Scenario: Protection of -48 V DC feed lines on central office line cards handling multiple subscriber loops. IC Role / Device Role / Timing Role: Bidirectional shunt element across power pair to divert longitudinal surges induced by nearby lightning strikes. Use Value: Maintains ≤1 µA leakage at nominal -48 V, avoiding false trip of supervision circuits while clamping to 179 V during ±4 kV transients. |
| Automotive Body Control Module (BCM) Power Rail | AC/DC Adapter Input Stage |
Use Scenario: 12 V–110 V wide-input BCM powering lighting, window lift, and door lock actuators in 48 V mild-hybrid architectures. IC Role / Device Role / Timing Role: First-line defense against load dump and jump-start transients on main battery rail, placed directly at connector entry. Use Value: Withstands 32.4 A peak current (8/20 µs) without degradation, enabling compliance with ISO 7637-2 Pulse 5a/b without additional series impedance. |
Use Scenario: Input protection for universal AC/DC adapters rated for 100–240 V AC input, rectified to ~150 V DC bus. IC Role / Device Role / Timing Role: Clamping diode across bulk capacitor to prevent overvoltage during MOV failure or high-line surge events. Use Value: Provides 400 W surge rating with <1 µA leakage at 110 V, eliminating standby power penalty while guaranteeing 179 V clamping ceiling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ110A | Unidirectional version - only clamps positive transients; requires separate grounding reference and cannot protect AC or floating lines. | Suitable only for grounded DC rails where negative transients are absent or handled elsewhere. | Select SMBJ110A only if system topology guarantees unidirectional surge exposure and space constraints favor identical footprint. |
| P6SMB110CA | Same electrical specs and DO-214AA package, but manufactured by ON Semiconductor; minor variation in VBR distribution (122–135 V vs. 122–136 V) and tighter IR screening (≤0.5 µA). | Drop-in replacement with identical layout, thermal, and ESD/surge performance; qualified for same industrial temp range. | Choose P6SMB110CA when dual-sourcing or second-source qualification is required without design change. |
Compared with SMBJ110A, the SMBJ110CA adds bidirectional capability essential for floating or AC-coupled systems; versus P6SMB110CA, it offers identical functional performance with manufacturer-specific process control-making both viable alternatives depending on supply chain and qualification needs.
Availability
SMBJ110CA is available at Aetrix Electronics and suitable for industrial power input protection, telecom line card surge suppression, and automotive body control module (BCM) power rail applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for SMBJ110CA 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
Littelfuse is a global leader in circuit protection, specializing in fuses, TVS diodes, varistors, and gas discharge tubes for industrial, automotive, and consumer markets since 1927.
The SMBJ series is part of Littelfuse's high-power surface-mount TVS portfolio, engineered for robust surge immunity in harsh environments where reliability, repeatable clamping, and fail-safe behavior are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ110CA under IEC 61000-4-5 surge conditions?
The SMBJ110CA clamps to 179 V when subjected to a 32.4 A peak pulse current (8/20 µs waveform), which corresponds to the IEC 61000-4-5 Level 4 surge test (±4 kV, 2 Ω source impedance). This value is guaranteed across –65°C to +150°C and is measured with standardized test fixtures per JEDEC standards. The SMBJ110CA maintains this clamping performance without derating up to its full temperature range.
Can SMBJ110CA be used in bidirectional signal lines like RS-485 or CAN?
Yes, SMBJ110CA is explicitly designed for bidirectional clamping and is commonly deployed on differential bus lines including RS-485, CAN, and Profibus. Its symmetrical VBR (122–135 V) and VC (179 V) ensure equal protection against both positive and negative transients. For optimal performance, place one SMBJ110CA across each line-to-ground and a third across the differential pair if common-mode immunity is critical.
How does SMBJ110CA compare to active transient suppressors like the Semtech TDS2211P?
The SMBJ110CA is a passive silicon avalanche diode with zero-latency response and no external bias, whereas the TDS2211P uses an active FET-based shunt architecture with precision trigger circuitry. SMBJ110CA offers higher working voltage (110 V vs. 22 V), simpler implementation, and fail-open safety-but higher clamping voltage (179 V vs. 28 V) and no temperature-stable clamping. SMBJ110CA suits high-voltage power rails; TDS2211P targets low-voltage data lines.
Is SMBJ110CA RoHS compliant and halogen-free?
Yes, SMBJ110CA is RoHS 2015/863 compliant and halogen-free per IEC 61249-2-21. Littelfuse certifies all SMBJ-series devices as lead-free, with matte tin-plated terminals and UL 94V-0 molding compound. The DO-214AA package meets J-STD-020 moisture sensitivity level 1 (MSL-1), allowing unlimited floor life before reflow.
What is the recommended PCB layout for SMBJ110CA to maximize surge performance?
Place SMBJ110CA as close as possible to the protected connector or entry point, with minimal trace length (<5 mm) between cathode/anode and protected line/ground. Use ≥15 mil wide traces and connect the cathode pad directly to a solid ground plane via ≥2 thermal vias. Avoid routing other signals near the SMBJ110CA pads to prevent coupling. Do not use thermal relief on ground connections-the SMBJ110CA relies on low-inductance paths to handle 32.4 A surges.
SMBJ110CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJxxCA
- 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:
- 177V
- Current - Peak Pulse (10/1000µs):
- 3.4A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ110CA FAQ
1.How can I place an order for SMBJ110CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ110CA 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 SMBJ110CA reliable?
The price and inventory of SMBJ110CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ110CA is usually 5 days.
3.What payment methods are accepted for SMBJ110CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ110CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ110CA?
SMBJ110CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ110CA 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 SMBJ110CA?
For technical support, including SMBJ110CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ110CA requirements.
6.How does Aetrix verify that SMBJ110CA is sourced from the original manufacturer or authorized distributors?
All SMBJ110CA 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 SMBJ110CA meets industry standards.
7.What is the process for return or replacement of SMBJ110CA?
All SMBJ110CA units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ110CA, 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 SMBJ110CA part is unused and in its original packaging.
Return procedure for SMBJ110CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ110CA 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 …
