My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ120CA-M3/52
;;2.jpg)
- Part No.:
- SMBJ120CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ120CA-M3/52.pdf
- Description:
- TVS DIODE 120VWM 193VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,718
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ120CA-M3/52 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 120 V standoff voltage (VWM), 133–147 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), and clamps to ≤193 V at 3.1 A peak surge current - used to protect MOSFETs, sensor interfaces, and industrial I/O circuits against ESD and inductive switching spikes.
For engineers reviewing the SMBJ120CA-M3/52 datasheet, SMBJ120CA-M3/52 pinout, SMBJ120CA-M3/52 application, or SMBJ120CA-M3/52 equivalent, key selection criteria include bidirectional clamping capability, 193 V maximum clamping voltage at rated IPPM, RoHS-compliant halogen-free construction (M3 suffix), and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional junction structure, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated silicon junction ensures stable VBR tolerance (±5%) and low leakage (<1.0 µA at VWM), critical for low-power sensor front-ends.
The device delivers 600 W transient suppression per the standardized 10/1000 µs waveform, with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W - confirming suitability for PCB-mounted operation without heatsinking under typical industrial ambient conditions (TA ≤ 70 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 120 V - maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 133–147 V at IT = 1 mA - guaranteed conduction onset range; ensures predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | ≤193 V at IPPM = 3.1 A - peak voltage seen by protected circuit during full-rated transient; limits stress on downstream ICs |
| PPPM (Peak Pulse Power) | 600 W (10/1000 µs) - energy-handling capacity for common lightning/inductive-spike waveforms; validated per ANSI/IEEE C62.35 |
| ID (Reverse Leakage) | ≤1.0 µA at VWM - negligible standby current; preserves battery life and avoids false triggering in high-impedance nodes |
| Package | SMB (DO-214AA) - industry-standard 2-pin SMD outline; 0.205" × 0.130" footprint; compatible with J-STD-020 MSL Level 1 reflow |
| Construction | Halogen-free, RoHS-compliant (M3 suffix); matte tin-plated leads; meets JESD201 Class 2 whisker resistance |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical terminal configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction terminals | Either terminal serves as anode or cathode depending on transient polarity; enables AC line or differential pair protection without orientation constraints |
| Cathode Band (absent) | Non-applicable for bidirectional types | No marking required - eliminates assembly errors during automated placement of CA-suffix devices |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Supports IEC 61000-4-5 Level 3 surge immunity (1 kV line-to-line) when paired with appropriate series impedance |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage overshoot during fast transients - critical for safeguarding 130 V-rated MOSFETs and industrial PLC inputs |
| MSL Level 1 moisture sensitivity | Enables standard reflow without baking; reduces manufacturing overhead and avoids moisture-induced popcorning |
| Halogen-free, RoHS-compliant (M3 suffix) | Fulfills EU ELV and JEITA EG02 standards; eliminates brominated flame retardants while maintaining UL 94 V-0 flammability rating |
| Fast response time (<1 ps) | Activates before most semiconductor junctions fail - protects sensitive analog front-ends and CAN transceivers from sub-nanosecond ESD events |
Applications
| Industrial Motor Drives | Automotive Sensor Interfaces |
|---|---|
Use Scenario: Protection of gate drivers and DC bus monitoring circuits against inductive kickback from brushed/BLDC motors. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across power rails or between gate and source. Use Value: Limits transient voltage to ≤193 V, preventing destruction of 200 V-rated SiC MOSFETs during 600 W surge events. |
Use Scenario: Shielding LIN/CAN physical layer receivers and Hall-effect sensor outputs from load dump and jump-start surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on supply and signal lines upstream of automotive-grade analog ICs. Use Value: Maintains <1.0 µA leakage at 120 V, ensuring minimal impact on low-current sensor bias networks. |
| Telecom Power Feeds | Industrial PLC Analog Inputs |
Use Scenario: Safeguarding -48 V DC telecom rectifier outputs and PSE controller circuits from lightning-induced surges. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), absorbing residual energy. Use Value: Clamps 3.1 A surge to ≤193 V within nanoseconds - coordinates with upstream GDT to meet ITU-T K.20/21 immunity requirements. |
Use Scenario: Guarding 4–20 mA current loop transmitters and RTD input stages against field wiring faults and EFT bursts. IC Role / Device Role / Timing Role: Line-to-line and line-to-ground TVS on isolated analog input terminals. Use Value: Symmetrical bidirectional behavior ensures equal protection for positive/negative fault transients in bipolar signal paths. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120CA-E3/52 | Same electrical specs; RoHS-compliant but contains brominated flame retardants (non-halogen-free) | Acceptable for commercial-grade systems where halogen-free compliance is not mandated | Select when cost sensitivity outweighs halogen-free requirement and UL 94 V-0 remains sufficient |
| SMBJ120A-M3/52 | Unidirectional version; cathode band marking; VF ≤ 3.5 V at 50 A forward conduction | Only suitable for DC-biased lines with defined polarity; cannot protect AC or differential signals | Choose only if circuit topology enforces strict unidirectional voltage polarity and forward conduction capability is needed |
Compared with SMBJ120CA-M3/52, the E3 variant trades halogen-free status for lower unit cost in non-automotive applications, while the unidirectional SMBJ120A-M3/52 requires polarity-aware layout and offers no AC protection - making SMBJ120CA-M3/52 the sole choice for polarity-agnostic, high-reliability industrial and automotive signal line protection.
Availability
SMBJ120CA-M3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive sensor interfaces, telecom power feeds, and PLC analog inputs requiring stable component supply with halogen-free compliance and MSL Level 1 handling.
Supply support for SMBJ120CA-M3/52 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 optoelectronics with emphasis on reliability, power efficiency, and AEC-Q101 qualification.
The SMBJ series was engineered for robust transient suppression in harsh environments - targeting industrial automation, automotive electronics, and telecom infrastructure where consistent clamping performance and long-term stability are mandatory.
FAQ
What is the maximum clamping voltage of SMBJ120CA-M3/52 at its rated peak pulse current?
The SMBJ120CA-M3/52 clamps to a maximum of 193 V at its rated peak pulse current (IPPM) of 3.1 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during worst-case transients - critical for ensuring compatibility with 200 V-rated power semiconductors and industrial ICs.
Is SMBJ120CA-M3/52 suitable for automotive applications?
SMBJ120CA-M3/52 itself is commercial-grade and not AEC-Q101 qualified; however, it shares identical electrical characteristics with the AEC-Q101-qualified variant SMBJ120CAHM3_B/H. For non-safety-critical automotive subsystems (e.g., body control modules, HVAC sensors), SMBJ120CA-M3/52 may be used subject to internal qualification - but full automotive deployment requires the HM3-suffixed AEC-Q101 version.
How does the bidirectional design of SMBJ120CA-M3/52 affect PCB layout compared to unidirectional TVS diodes?
The SMBJ120CA-M3/52 has no polarity marking and functions identically in both directions, eliminating orientation constraints during automated placement. Unlike unidirectional variants (e.g., SMBJ120A-M3/52) that require cathode-band alignment, SMBJ120CA-M3/52 simplifies layout for AC-coupled lines, differential buses (like RS-485), and floating grounds - reducing assembly errors and enabling reuse across complementary signal paths.
What is the thermal resistance of SMBJ120CA-M3/52, and how does it impact power derating?
SMBJ120CA-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W. When mounted on the recommended 0.2" × 0.2" copper pads, its 5.0 W steady-state power dissipation derates linearly above TA = 25 °C - reaching zero at TJ = 150 °C. This allows reliable operation up to +70 °C ambient without forced cooling in typical industrial enclosures.
Does SMBJ120CA-M3/52 meet UL recognition requirements for transient protectors?
Yes, SMBJ120CA-M3/52 carries Underwriters Laboratories recognition under file number E136766 for both unidirectional and bidirectional TVS devices, compliant with UL 497B for signal and power line protectors. This certification validates its safety performance in end-equipment meeting UL/IEC 62368-1 and related standards - essential for North American telecom and industrial equipment certifications.
SMBJ120CA-M3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 120V
- Voltage - Breakdown (Min):
- 133V
- Voltage - Clamping (Max) @ Ipp:
- 193V
- Current - Peak Pulse (10/1000µs):
- 3.1A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ120CA-M3/52 FAQ
1.How can I place an order for SMBJ120CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ120CA-M3/52 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 SMBJ120CA-M3/52 reliable?
The price and inventory of SMBJ120CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ120CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ120CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ120CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ120CA-M3/52?
SMBJ120CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ120CA-M3/52 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 SMBJ120CA-M3/52?
For technical support, including SMBJ120CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ120CA-M3/52 requirements.
6.How does Aetrix verify that SMBJ120CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ120CA-M3/52 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 SMBJ120CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ120CA-M3/52?
All SMBJ120CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ120CA-M3/52, 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 SMBJ120CA-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ120CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ120CA-M3/52 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
