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Microchip Technology SMAJ120CE3/TR13
- Part No.:
- SMAJ120CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ120CE3/TR13.pdf
- Description:
- TVS DIODE 120VWM 214VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,371
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Product details
Overview
SMAJ120CE3/TR13 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for high-energy surge protection in DC power rails and signal lines. It features a 120 V reverse standoff voltage (VWM), 133 V minimum breakdown voltage (VBR), clamps transients to ≤214 V at 193 A peak pulse current (IPP), and delivers 500 W peak pulse power (10/1000 µs). It is used in industrial power supplies, telecom interface protection, and automotive control modules requiring IEC61000-4-5 Class 2 secondary lightning immunity.
For engineers reviewing the SMAJ120CE3/TR13 datasheet, SMAJ120CE3/TR13 pinout, SMAJ120CE3/TR13 application, or SMAJ120CE3/TR13 equivalent, this page provides verified electrical parameters, bidirectional clamping behavior, DO-214AC package dimensions, RoHS-compliant matte-tin terminations, and IEC61000-4-2/4-4/4-5 compliance details - all critical for ESD-hardened PCB layout and reliability validation.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical clamping performance in forward and reverse directions. Its <100 ps theoretical response time enables effective suppression of ESD events per IEC61000-4-2 Level 4 (±15 kV contact) and fast EFT bursts per IEC61000-4-4 (±2 kV).
Rated for -65°C to +150°C operating temperature and 15°C/W junction-to-lead thermal resistance, it sustains 5 W steady-state dissipation at 75°C lead temperature. The device meets MIL-PRF-19500 screening options when prefixed with MX, and supports avionics-grade screening (MA prefix) with 10× thermal cycling and HTRB testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - Maximum continuous DC or RMS voltage the device blocks without conduction. |
| VBR min @ IBR | 133 V @ 1 mA - Minimum voltage at which device enters avalanche breakdown; ensures reliable triggering above normal operating voltage. |
| VC @ IPP | 214 V @ 193 A - Clamped voltage during 10/1000 µs surge; defines maximum stress imposed on protected downstream circuitry. |
| PPP | 500 W - Peak pulse power handling capability; determines survivability against standardized lightning-induced surges (IEC61000-4-5). |
| IPP | 193 A - Peak current the device safely shunts during 10/1000 µs waveform; directly correlates with system-level surge immunity level. |
| ID @ VWM | 2.3 µA - Leakage current at rated standoff voltage; low value minimizes standby power loss and avoids false triggering. |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with wide leads for enhanced thermal dissipation and mechanical robustness on FR4 PCBs. |
Pinout & Package
DO-214AC (SMA) package: void-free thermosetting epoxy body (UL94V-0), C-bend (modified J-bend) leads with RoHS-compliant annealed matte-tin plating, cathode band omitted for bidirectional configuration. Moisture sensitivity level 1 - no dry pack required per IPC/JEDEC J-STD-020B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No polarity marking; interchangeable connection - protects AC-coupled lines or dual-rail DC systems without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPP in both directions - eliminates need for polarity-aware placement in AC or differential signal paths. |
| IEC61000-4-5 compliance | Class 2 secondary lightning protection (42 Ω source) up to 120 V VWM - validated for telecom and industrial equipment subjected to induced surges. |
| Fast transient response | <5 ns clamping onset for bidirectional operation - captures ESD and EFT energy before sensitive ICs experience overstress. |
| RoHS-compliant termination | Matte-tin plating per MIL-STD-750 Method 2026 - ensures solderability and long-term intermetallic stability under thermal cycling. |
| High surge current rating | 193 A peak pulse current (10/1000 µs) - supports robust protection in 24–48 V industrial control and PoE-powered systems. |
Applications
| Industrial Power Supply Input Protection | Telecom Ethernet Interface Protection |
|---|---|
Use Scenario: 48 V DC input rail in programmable logic controllers exposed to load dump and inductive switching transients. IC Role / Device Role: Bidirectional TVS placed across input terminals to clamp positive/negative surges before upstream DC-DC converter. Use Value: Limits transient voltage to ≤214 V, preventing damage to 60 V-rated input MOSFETs and enabling compliance with IEC61000-4-5 Class 2 (42 Ω source). |
Use Scenario: RJ45 Ethernet port in network switch facing ESD events and induced RF coupling from adjacent cables. IC Role / Device Role: TVS array component protecting differential pairs (e.g., TX+/TX−) against ±15 kV contact ESD per IEC61000-4-2. Use Value: Sub-5 ns response ensures clamping before PHY transceiver latch-up; low 2.3 µA leakage avoids signal integrity degradation. |
| Automotive Body Control Module (BCM) | Renewable Energy Inverter DC Link Protection |
Use Scenario: 12 V battery-supplied BCM subjected to ISO 7637-2 pulse 1 (inductive load dump) and pulse 2a (alternator switching). IC Role / Device Role: Bidirectional TVS across microcontroller supply pins to absorb negative transients and clamp positive spikes. Use Value: Withstands −100 V to +120 V transients while maintaining 120 V standoff; operates reliably from −65°C to +150°C ambient. |
Use Scenario: DC link between PV array and inverter in solar microinverters, exposed to lightning-induced surges on outdoor wiring. IC Role / Device Role: Primary surge protector across 300–400 V DC bus to limit overvoltage during IEC61000-4-5 line-to-ground surges. Use Value: 500 W peak power rating and 214 V clamping enable coordination with downstream MOVs and fuses in multi-stage protection schemes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ120CA | Identical VWM (120 V), VBR (133 V), VC (214 V), and IPP (193 A); same DO-214AC package and RoHS compliance. | No functional difference; validated for same IEC61000-4-2/4-4/4-5 classes and industrial temperature range. | Select when dual-sourcing is required or Littelfuse distribution channels offer better lead time or volume pricing. |
| ON Semiconductor SMAJ120A | Unidirectional variant - requires correct polarity orientation; lacks symmetrical clamping; VC = 214 V only in reverse direction. | Not suitable for AC or floating differential lines; limited to single-polarity DC rails where cathode grounding is fixed. | Choose only if circuit topology enforces strict unidirectional bias and board layout allows dedicated cathode routing. |
Compared with SMAJ120CE3/TR13, Littelfuse SMAJ120CA offers identical bidirectional performance and drop-in compatibility, while ON Semiconductor SMAJ120A sacrifices symmetry for marginally lower cost in polarity-constrained designs - making the Microsemi part optimal for flexible, high-reliability surge protection.
Availability
SMAJ120CE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, telecom interface protection, and automotive body control modules requiring stable component supply and full IEC61000-4-5 Class 2 compliance.
Supply support for SMAJ120CE3/TR13 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
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The SMAJ series was developed specifically for surface-mount transient voltage suppression in harsh environments, emphasizing robust surge handling, low leakage, and extended temperature operation - targeting mission-critical power and interface protection.
FAQ
What does the "C" suffix in SMAJ120CE3/TR13 indicate?
The "C" suffix denotes a bidirectional configuration - meaning SMAJ120CE3/TR13 provides symmetrical clamping in both polarities, with identical breakdown and clamping characteristics regardless of voltage polarity. This eliminates orientation concerns during placement and supports AC-coupled or floating signal lines, unlike unidirectional variants such as SMAJ120A.
Is SMAJ120CE3/TR13 RoHS compliant and what does the "e3" signify?
Yes, SMAJ120CE3/TR13 is RoHS compliant. The "e3" suffix explicitly indicates annealed matte-tin plating per JEDEC standards, replacing traditional tin-lead terminations. This ensures full compliance with EU RoHS Directive 2011/65/EU and supports lead-free reflow soldering processes up to 260°C for 10 seconds.
What is the maximum clamping voltage of SMAJ120CE3/TR13 under standard test conditions?
The maximum clamping voltage (VC) of SMAJ120CE3/TR13 is 214 V when subjected to a 10/1000 µs waveform at its rated peak pulse current of 193 A. This value is measured per industry-standard surge testing and defines the upper voltage limit imposed on protected circuitry during worst-case transient events.
Can SMAJ120CE3/TR13 be used for IEC61000-4-5 lightning surge protection?
Yes, SMAJ120CE3/TR13 is certified for IEC61000-4-5 secondary lightning surge immunity. At 42 Ω source impedance, it supports Class 2 protection (up to 120 V VWM); at 12 Ω source impedance, it qualifies for Class 1 (up to 30 V VWM). Its 500 W rating and 214 V clamping make it suitable for front-end protection in industrial and telecom equipment.
What package type does SMAJ120CE3/TR13 use and are footprint dimensions provided?
SMAJ120CE3/TR13 uses the DO-214AC (SMA) surface-mount package. Official Microsemi documentation specifies exact dimensions: length 4.93–5.48 mm, width 3.99–4.50 mm, height 2.26 mm max, with recommended pad layout matching JEDEC MS-013. These dimensions ensure mechanical compatibility with standard SMA footprints and thermal performance on 1 oz copper FR4 boards.
SMAJ120CE3/TR13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- 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:
- 214V
- Current - Peak Pulse (10/1000µs):
- 2.3A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ120CE3/TR13 FAQ
1.How can I place an order for SMAJ120CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ120CE3/TR13 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 SMAJ120CE3/TR13 reliable?
The price and inventory of SMAJ120CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ120CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ120CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ120CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ120CE3/TR13?
SMAJ120CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ120CE3/TR13 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 SMAJ120CE3/TR13?
For technical support, including SMAJ120CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ120CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ120CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ120CE3/TR13 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 SMAJ120CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ120CE3/TR13?
All SMAJ120CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ120CE3/TR13, 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 SMAJ120CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ120CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ120CE3/TR13 Tags
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