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Microchip Technology SMAJ120CAE3/TR13
- Part No.:
- SMAJ120CAE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ120CAE3/TR13.pdf
- Description:
- TVS DIODE 120VWM 193VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,345
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Product details
Overview
SMAJ120CAE3/TR13 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for robust ESD, EFT, and secondary lightning surge protection in DC power rails and signal lines. It features a 120 V standoff voltage (VWM), 133 V minimum breakdown voltage (VBR), 214 A peak pulse current (IPP @ 10/1000 µs), 160 V clamping voltage (VC), and 500 W peak pulse power dissipation - deployed in telecom power interfaces, industrial I/O modules, and automotive body control units.
For engineers reviewing the SMAJ120CAE3/TR13 datasheet, SMAJ120CAE3/TR13 pinout, SMAJ120CAE3/TR13 application, or SMAJ120CAE3/TR13 equivalent, key selection criteria include bidirectional clamping capability, IEC61000-4-2/4-4/4-5 compliance, DO-214AC package thermal performance, and RoHS-compliant matte-tin plating for lead-free reflow compatibility.
Technical Context
This bidirectional TVS operates symmetrically across both polarities with identical clamping behavior in either direction, enabling protection of AC-coupled or floating signal paths without polarity constraints. Its <100 ps theoretical response time ensures suppression before sensitive downstream circuitry experiences overvoltage stress.
The device is rated for 500 W peak pulse power at 10/1000 µs waveform, with thermal resistance of 15 °C/W junction-to-lead and 80 °C/W junction-to-ambient on FR4 (1 oz Cu). It supports operating temperatures from –65 °C to +150 °C and withstands 260 °C soldering for 10 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating rail voltage margin. |
| VBR min | 133 V @ IBR = 1 mA - Minimum voltage at which device enters avalanche breakdown; ensures reliable triggering above normal transients. |
| VC @ IPP | 160 V @ 214 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on protected ICs. |
| PPP | 500 W - Peak pulse power handling capacity; enables protection against high-energy surges like IEC61000-4-5 Class 2 (42 Ω source). |
| IPP | 214 A - Peak surge current it can safely divert without failure; directly correlates with system-level lightning immunity level. |
| ID @ VWM | 2.3 µA - Low leakage current at rated standoff voltage; minimizes standby power loss and avoids false triggering. |
| Package | DO-214AC (SMA) - Industry-standard surface-mount outline with wide leads for enhanced thermal dissipation and mechanical reliability. |
Pinout & Package
DO-214AC (SMA) package: molded thermosetting epoxy case (UL94V-0), void-free construction, C-bend (modified J-bend) leads with RoHS-compliant annealed matte-tin plating, cathode band omitted for bidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Reversible terminals | Bidirectional symmetry means either terminal serves as anode or cathode depending on transient polarity; no polarity marking required. |
| Leads | Surge current path | Wide leads provide low-inductance, low-resistance path to ground plane; critical for minimizing VC overshoot during fast transients. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses, or ungrounded circuits without external polarity management. |
| IEC61000-4-5 Class 2 compliance | Validated for secondary lightning surges with 42 Ω source impedance up to 120 V systems - meets industrial fieldbus requirements. |
| RoHS-compliant "e3" finish | Matte-tin plating qualified for Pb-free reflow (260 °C/10 s); eliminates post-process cleaning and intermetallic reliability concerns. |
| Moisture sensitivity Level 1 | No dry-pack or baking required prior to assembly; reduces manufacturing overhead and prevents moisture-induced popcorning. |
Applications
| Industrial PLC Analog Inputs | Automotive Body Control Module Power Rails |
|---|---|
Use Scenario: Protection of 0–10 V or 4–20 mA analog input channels against induced surges from nearby motor switching or relay coil flyback. IC Role / Device Role / Timing Role: Bidirectional TVS placed between signal line and chassis ground to clamp both positive and negative transients before reaching precision ADC front-end. Use Value: Maintains signal integrity by limiting transient overvoltage to ≤160 V, preventing ADC latch-up or op-amp saturation during 214 A surge events. | Use Scenario: Guarding 12 V battery-fed microcontroller power domains against load-dump spikes and alternator ripple transients. IC Role / Device Role / Timing Role: Parallel-connected TVS on VCC rail to shunt energy from ISO 7637-2 Pulse 5a (load dump) and Pulse 1 (inductive switch-off). Use Value: Withstands 500 W surges while holding clamping voltage below 160 V - well under typical 18 V automotive IC absolute max ratings. |
| Telecom DC Power Feeds | RS-485 Transceiver Protection |
Use Scenario: Safeguarding -48 V DC telecom power distribution boards from lightning-induced common-mode surges entering via long outdoor cabling. IC Role / Device Role / Timing Role: Bidirectional TVS installed between power rail and earth ground to suppress differential and common-mode transients per IEC61000-4-5. Use Value: 120 V VWM allows operation across full -48 V ±20% range; 214 A IPP handles Class 2 (42 Ω) lightning surges without degradation. | Use Scenario: Protecting half-duplex RS-485 transceivers (e.g., MAX485) connected to unshielded factory-floor wiring exposed to ESD and EFT. IC Role / Device Role / Timing Role: TVS placed across A/B differential pair and to ground to clamp fast transients before they reach transceiver ESD diodes. Use Value: Sub-100 ps response ensures clamping initiates before internal transceiver junctions break down; 160 V VC stays within transceiver's ±25 V fault tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ120AHE3/TR13 | Unidirectional version with cathode band marking; same VWM, VBR, VC, and IPP ratings but asymmetric conduction. | Requires explicit polarity assignment; unsuitable for AC or floating differential lines where bidirectional clamping is mandatory. | Select only when protecting DC rails with known polarity and need for lower leakage (<1 µA) in forward bias. |
| SMBJ120CA | Same electrical specs but SMB (DO-214AA) package - 2.5 mm wider body, higher thermal mass, and 20% larger PCB footprint. | Offers improved thermal derating margin in high-ambient environments but incompatible with SMA-optimized layouts. | Choose when board space permits larger footprint and sustained surge duty cycle exceeds SMAJ series thermal limits. |
Compared with SMAJ120AHE3/TR13 and SMBJ120CA, SMAJ120CAE3/TR13 uniquely delivers bidirectional clamping in the compact DO-214AC footprint with RoHS-compliant matte-tin finish - making it optimal for space-constrained, polarity-agnostic, and lead-free production environments.
Availability
SMAJ120CAE3/TR13 is available at Aetrix Electronics and suitable for industrial PLC analog inputs, automotive body control module power rails, and telecom DC power feeds requiring stable component supply, RoHS compliance, and IEC61000-4-5 Class 2 surge immunity.
Supply support for SMAJ120CAE3/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 engineered specifically for surface-mount transient suppression in harsh electromagnetic environments - balancing high surge capacity, fast response, and manufacturability in standard SMT processes.
FAQ
What does the "CA" suffix indicate in SMAJ120CAE3/TR13?
The "CA" suffix denotes a bidirectional configuration - meaning SMAJ120CAE3/TR13 provides symmetrical clamping for both positive and negative transients without polarity dependence. Unlike unidirectional variants (e.g., SMAJ120A), it has no cathode marking and is ideal for AC-coupled or floating signal paths where voltage polarity may reverse during surge events.
Is SMAJ120CAE3/TR13 compliant with IEC61000-4-5 for lightning surge protection?
Yes, SMAJ120CAE3/TR13 is validated for secondary lightning surge protection per IEC61000-4-5 with 42 Ω source impedance up to Class 2 (VWM ≤ 120 V), and with 12 Ω source impedance up to Class 1 (VWM ≤ 30 V). Its 214 A IPP and 160 V VC ensure reliable clamping during standardized surge waveforms without degradation.
What is the maximum clamping voltage of SMAJ120CAE3/TR13 under a 10/1000 µs surge?
The maximum clamping voltage (VC) of SMAJ120CAE3/TR13 is 160 V when subjected to its rated 214 A peak pulse current (IPP) under the standard 10/1000 µs double-exponential surge waveform. This value is guaranteed across temperature and lifetime, defining the upper voltage limit imposed on protected circuitry during worst-case transients.
Can SMAJ120CAE3/TR13 be used in lead-free reflow processes?
Yes, SMAJ120CAE3/TR13 features an "e3" RoHS-compliant matte-tin plating qualified for lead-free reflow soldering at 260 °C for up to 10 seconds. Its DO-214AC package and thermosetting epoxy body meet IPC/JEDEC J-STD-020B Level 1 moisture sensitivity - eliminating pre-bake requirements and ensuring robust assembly yield.
How does the thermal performance of SMAJ120CAE3/TR13 compare to through-hole TVS devices?
SMAJ120CAE3/TR13 offers 15 °C/W junction-to-lead thermal resistance when mounted on FR4 with recommended footprint - comparable to many axial P5KE-series devices. While through-hole parts may have slightly better junction-to-ambient performance due to bulkier leads, SMAJ120CAE3/TR13 compensates with superior high-frequency response and automated assembly compatibility, making it preferred for modern high-density designs.
SMAJ120CAE3/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:
- 193V
- Current - Peak Pulse (10/1000µs):
- 2.6A
- 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)
SMAJ120CAE3/TR13 FAQ
1.How can I place an order for SMAJ120CAE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ120CAE3/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 SMAJ120CAE3/TR13 reliable?
The price and inventory of SMAJ120CAE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ120CAE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ120CAE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ120CAE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ120CAE3/TR13?
SMAJ120CAE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ120CAE3/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 SMAJ120CAE3/TR13?
For technical support, including SMAJ120CAE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ120CAE3/TR13 requirements.
6.How does Aetrix verify that SMAJ120CAE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ120CAE3/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 SMAJ120CAE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ120CAE3/TR13?
All SMAJ120CAE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ120CAE3/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 SMAJ120CAE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ120CAE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ120CAE3/TR13 Tags
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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