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Diodes Incorporated SMBJ120CA-13-F
- Part No.:
- SMBJ120CA-13-F
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ120CA-13-F.pdf
- Description:
- TVS DIODE 120VWM 193VC SMB
- Quantity:
- Payment:
- Shipping:
Inventory:2,966
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Product details
Overview
SMBJ120CA-13-F from Diodes Incorporated is a bi-directional transient voltage suppressor (TVS) diode in SMB package, designed for overvoltage protection of sensitive electronics. It features 120 V reverse standoff voltage (VRWM), 133–153 V breakdown voltage (VBR), 193 V max clamping voltage at 3.1 A peak pulse current, and 600 W peak pulse power dissipation - deployed in industrial power supplies and automotive ECUs to absorb ESD and lightning-induced surges.
For engineers reviewing the SMBJ120CA-13-F datasheet, SMBJ120CA-13-F pinout, SMBJ120CA-13-F application, or SMBJ120CA-13-F equivalent, key selection criteria include clamping voltage margin relative to system rail, bidirectional surge handling capability, SMB package thermal performance under repetitive transients, and RoHS/Green compliance for high-reliability PCB assembly.
Technical Context
This TVS operates as a voltage-clamped shunt protector: when transient voltage exceeds VRWM (120 V), it avalanches into low-impedance conduction, limiting downstream voltage to ≤193 V at 3.1 A IPP. Its glass-passivated die ensures stable breakdown characteristics and low leakage (<5 µA at VRWM).
Rated for -55°C to +150°C operating junction temperature, it supports high-temperature environments such as engine control units and industrial motor drives. The bi-directional configuration enables symmetric protection on AC lines or floating DC busses without polarity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 600 W - sustains single 10/1000 µs surge events without failure |
| Reverse Standoff Voltage | 120 V - maximum continuous working voltage before clamping initiates |
| Breakdown Voltage | 133–153 V @ 1 mA - defines precise avalanche onset range for predictable protection threshold |
| Max Clamping Voltage | 193 V @ 3.1 A IPP - limits protected circuit voltage during worst-case transient |
| Peak Pulse Current | 3.1 A - maximum surge current the device can safely divert at rated clamping voltage |
| Junction Temperature Range | -55°C to +150°C - enables use in under-hood automotive and industrial ambient conditions |
| Package | SMB - surface-mount outline with 3.3–3.94 mm body length, optimized for thermal dissipation and board space efficiency |
Pinout & Package
Package: SMB (Surface-Mount Small Outline), molded plastic case per UL 94V-0, 0.1 g weight, matte tin-plated terminals solderable per MIL-STD-202.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during negative transient | One terminal of symmetrical bi-directional junction - no polarity marking required |
| Cathode | Current entry point during positive transient | Second terminal of symmetrical bi-directional junction - identical physical structure to Anode |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Enables robust protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges in compact SMB footprint |
| Glass-passivated die construction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress |
| Bi-directional configuration | Provides symmetrical clamping on AC signal lines or ungrounded DC rails without external polarity management |
| RoHS-compliant & Halogen-free | Meets IPC-1752A material declaration requirements for green manufacturing and end-of-life recycling |
| Level 1 moisture sensitivity | Allows unlimited floor life before reflow - eliminates bake requirement for standard SMT assembly |
Applications
| Industrial Power Supply Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: Protects 120 V DC input stage of programmable logic controller (PLC) power supply against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Shunt-type transient voltage suppressor placed across input capacitor, clamping surges within 1 ns response time. Use Value: Limits voltage excursion to ≤193 V, preventing damage to upstream rectifier and downstream DC-DC controller ICs. |
Use Scenario: Safeguards LIN bus transceiver and microcontroller I/O pins in BCM against battery line transients during jump-start or alternator load dump. IC Role / Device Role / Timing Role: Bi-directional TVS connected between LIN line and ground, absorbing ±100 V/500 ms pulses per ISO 7637-2 Pulse 5a. Use Value: Maintains signal integrity by clamping without forward conduction, avoiding false wake-up or bus lockup. |
| AC Motor Drive Control Board | Telecom Remote Radio Unit (RRU) |
Use Scenario: Shields gate driver inputs and feedback sensing circuits on 3-phase inverter control board exposed to fast-rising EFT bursts from contactor switching. IC Role / Device Role / Timing Role: Fast-response TVS placed at analog sensor input nodes (e.g., current sense amplifier), suppressing sub-100 ns transients. Use Value: Prevents latch-up or offset drift in precision amplifiers by limiting transient overvoltage to <193 V with <1 ns response. |
Use Scenario: Protects RS-485 communication interface on outdoor RRU baseband board subjected to induced lightning surges via long cable runs. IC Role / Device Role / Timing Role: Bidirectional TVS installed differential-mode across A/B lines, referenced to local ground plane. Use Value: Enables compliance with ITU-T K.21 Basic Protection Level (4 kV) while maintaining <1 pF parasitic capacitance for 10 Mbps data integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ120A-13-F | Uni-directional; requires correct polarity placement; VF = 5.0 V forward voltage | Only suitable where circuit ground reference is fixed and polarity known (e.g., DC input rails) | Select only if unidirectional clamping suffices and layout allows cathode orientation control |
| SMCJ120CA | Larger SMC package; 1500 W peak power; higher thermal mass and 2× footprint area | Better suited for high-energy surges (>100 A IPP) but incompatible with SMB land pattern | Choose when surge energy exceeds 600 W rating or board layout permits larger package |
Compared with SMBJ120CA-13-F, the uni-directional SMBJ120A-13-F offers lower forward voltage but demands strict polarity alignment, while the SMCJ120CA delivers higher surge capacity at the cost of PCB area and thermal coupling - making SMBJ120CA-13-F optimal for space-constrained, bidirectional AC/DC protection where 600 W rating is sufficient.
Availability
SMBJ120CA-13-F is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, AC motor drive control boards, and telecom remote radio units requiring stable component supply and full RoHS/Green compliance.
Supply support for SMBJ120CA-13-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the US.
This device belongs to Diodes' SMBJ series of surface-mount TVS diodes, engineered specifically for high-reliability transient suppression in automotive, industrial, and telecom infrastructure applications where compact size and repeatable clamping performance are critical.
FAQ
What is the meaning of the 'C' suffix in SMBJ120CA-13-F?
The 'C' denotes bi-directional functionality: the device provides symmetrical clamping for both positive and negative voltage transients without polarity dependence. Unlike uni-directional variants (e.g., SMBJ120A), it has no cathode band marking and is used where AC signals or floating DC rails require equal protection in both directions.
Can SMBJ120CA-13-F be used in place of a uni-directional TVS in a DC power rail?
Yes, it can replace a uni-directional TVS on a DC rail, but with trade-offs: its bi-directional structure results in slightly higher leakage current above VRWM and no inherent forward conduction path. It remains effective for overvoltage clamping, though layout must ensure no unintended reverse-bias stress on downstream components.
What is the thermal resistance junction-to-ambient (RθJA) for SMBJ120CA-13-F?
While not explicitly specified in DS19002 Rev. 20-2, typical RθJA for SMB-packaged TVS diodes on standard 1-inch² 1 oz copper pad is ~120°C/W. Actual value depends on PCB layout; for thermal design, use the 5.0 W steady-state power rating at TL = +75°C and derate linearly above that temperature using the 4.8 W/°C slope.
Does SMBJ120CA-13-F meet IEC 61000-4-2 and IEC 61000-4-5 standards?
The device itself is not certified to these standards, but its electrical parameters - including 193 V clamping at 3.1 A and sub-1 ns response - enable system-level compliance when properly applied in circuits meeting IEC 61000-4-2 (ESD) and IEC 61000-4-5 (surge) test configurations. Layout, grounding, and PCB trace inductance critically affect final system performance.
SMBJ120CA-13-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- DO-214AA, SMB
- Series:
- SMBJ
- 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:
- SMB
SMBJ120CA-13-F FAQ
1.How can I place an order for SMBJ120CA-13-F through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ120CA-13-F 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-13-F reliable?
The price and inventory of SMBJ120CA-13-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ120CA-13-F is usually 5 days.
3.What payment methods are accepted for SMBJ120CA-13-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ120CA-13-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ120CA-13-F?
SMBJ120CA-13-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ120CA-13-F 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-13-F?
For technical support, including SMBJ120CA-13-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ120CA-13-F requirements.
6.How does Aetrix verify that SMBJ120CA-13-F is sourced from the original manufacturer or authorized distributors?
All SMBJ120CA-13-F 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-13-F meets industry standards.
7.What is the process for return or replacement of SMBJ120CA-13-F?
All SMBJ120CA-13-F units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ120CA-13-F, 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-13-F part is unused and in its original packaging.
Return procedure for SMBJ120CA-13-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ120CA-13-F Tags
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ESD9B5.0ST5G
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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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Toshiba Semiconductor and Storage
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Diodes Incorporated
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