My Inquiry
My Account
Microchip Technology SMAJ120E3/TR13
- Part No.:
- SMAJ120E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ120E3/TR13.pdf
- Description:
- TVS DIODE 120VWM 214VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,822
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ120E3/TR13 from Microsemi is a unidirectional surface-mount Transient Voltage Suppressor (TVS) designed for primary 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), 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 body electronics.
For engineers reviewing the SMAJ120E3/TR13 datasheet, SMAJ120E3/TR13 pinout, SMAJ120E3/TR13 application, or SMAJ120E3/TR13 equivalent, key selection criteria include clamping voltage margin vs. protected IC's absolute maximum rating, IEC61000-4-5 Class 2 compliance with 42 Ω source impedance, RoHS-compliant matte-tin plating, and DO-214AC package thermal performance on FR4.
Technical Context
This unidirectional TVS operates as a voltage-clamped shunt device triggered above its reverse standoff voltage (120 V), with sub-100 ps theoretical response time enabling effective suppression of ESD (IEC61000-4-2) and EFT (IEC61000-4-4) events. Its 133 V minimum breakdown ensures reliable conduction before downstream component damage.
The device sustains 500 W peak pulse power under standardized 10/1000 µs waveform, dissipates 5 W steady-state power at lead temperature (TL) of 75 °C, and exhibits 2.3 µA maximum standby leakage at VWM. Thermal resistance is 15 °C/W junction-to-lead when mounted per recommended footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 120 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected circuit DC rail. |
| VBR min @ IBR | 133 V @ 1 mA - Minimum voltage at which device enters avalanche breakdown; defines turn-on threshold consistency. |
| VC @ IPP | 214 V @ 193 A - Clamping voltage during 10/1000 µs surge; must remain below protected IC's absolute max rating. |
| PPP | 500 W - Peak pulse power handling capability; determines survivability against transient energy per IEC61000-4-5. |
| ID @ VWM | 2.3 µA - Reverse leakage current at standoff voltage; low value minimizes standby power loss and avoids false triggering. |
| TJ Range | –65 °C to +150 °C - Operating and storage temperature range; supports industrial and under-hood automotive environments. |
| Package | DO-214AC (SMA) - Standardized surface-mount outline with wide leads for thermal dissipation and mechanical robustness. |
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 indicated by band. Weight: 0.064 g. Moisture sensitivity level: Level 1 (no dry pack required).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes shunt path during overvoltage event. |
| Cathode | High-side input terminal | Connected to protected line (e.g., 120 V rail); polarity marking ensures correct orientation in series with load. |
Key Features
| Feature | Design Value |
|---|---|
| 500 W peak pulse power (10/1000 µs) | Enables robust protection against IEC61000-4-5 secondary lightning surges up to Class 2 (42 Ω source). |
| RoHS-compliant "e3" suffix | Meets EU RoHS Directive 2011/65/EU with annealed matte-tin plating; compatible with lead-free reflow profiles. |
| Unidirectional configuration | Provides asymmetric clamping ideal for DC-powered circuits where reverse polarity protection is not required. |
| Fast response time | <100 ps theoretical turn-on enables suppression of ESD (IEC61000-4-2 ±8 kV contact) before IC damage occurs. |
| DO-214AC thermal design | 15 °C/W junction-to-lead thermal resistance allows sustained operation at 5 W when mounted per recommended footprint. |
Applications
| Industrial Power Supply Protection | Telecom Interface Line Protection |
|---|---|
Use Scenario: 120 V DC input rail in programmable logic controller (PLC) power module exposed to inductive switching transients and utility grid surges. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between rail and chassis ground to clamp transients exceeding 120 V. Use Value: Limits voltage to ≤214 V during 193 A surge, protecting downstream DC-DC converters and microcontrollers rated to 250 V absolute max. |
Use Scenario: RS-485 data line in outdoor base station equipment subjected to induced RF and lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (one per line) referenced to local ground to suppress differential and common-mode transients. Use Value: Sub-100 ps response prevents data corruption during ESD events; 2.3 µA leakage avoids signal integrity degradation on high-impedance bus lines. |
| Automotive Body Control Module | Renewable Energy Inverter DC Link |
Use Scenario: 120 V battery-derived supply in vehicle lighting control unit exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary clamping device on main power input, upstream of LDO regulators and CAN transceivers. Use Value: Withstands 500 W pulses without degradation; –65 °C to +150 °C rating supports under-hood thermal cycling. |
Use Scenario: DC link between photovoltaic array and inverter stage, subject to fast-rising solar array transients and grid fault coupling. IC Role / Device Role / Timing Role: Parallel-connected TVS array on high-voltage DC bus to absorb repetitive switching spikes and lightning-induced energy. Use Value: 133 V breakdown ensures stable conduction onset; DO-214AC package enables automated placement and thermal reliability on high-copper PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMCJ120A-E3/57T | Higher power rating (1500 W), larger DO-214AB (SMC) package, 133 V VBR, 193 A IPP at 214 V VC. | Used where higher single-pulse energy absorption is required; less suitable for space-constrained layouts. | Select when system-level surge testing exceeds 500 W or requires MIL-STD-810G compliance. |
| SMBJ120A-E3/52 | Lower power rating (600 W), smaller DO-214AA (SMB) package, same 120 V VWM/133 V VBR, 193 A IPP at 214 V VC. | Preferred for compact consumer electronics where board area is constrained but 600 W suffices. | Choose for cost-sensitive, high-volume designs with moderate surge exposure and tighter layout footprints. |
Compared with SMAJ120E3/TR13, SMCJ120A-E3/57T offers triple the peak pulse power in a larger package, while SMBJ120A-E3/52 trades 100 W lower power for 30% smaller footprint-enabling optimization for either ruggedness or density without altering clamping behavior.
Availability
SMAJ120E3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, telecom interface protection, and automotive body electronics requiring stable component supply across extended production lifecycles.
Supply support for SMAJ120E3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The SMAJ series was engineered for surface-mount transient suppression in harsh environments, emphasizing fast response, repeatable clamping, and thermal resilience in compact DO-214AC packaging.
FAQ
What is the clamping voltage of SMAJ120E3/TR13 at its rated peak pulse current?
The SMAJ120E3/TR13 clamps to a maximum of 214 V when subjected to its rated 193 A peak pulse current (IPP) under the standard 10/1000 µs waveform. This value is guaranteed per Microsemi's MSC0270A datasheet and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SMAJ120E3/TR13 unidirectional or bidirectional, and how is polarity marked?
SMAJ120E3/TR13 is a unidirectional TVS diode. Polarity is marked by a cathode band on the package body, indicating the high-side terminal; the opposite end is the anode. This configuration ensures conduction only when the cathode is at a higher potential than the anode-ideal for DC rail protection.
Does SMAJ120E3/TR13 meet IEC61000-4-5 for lightning surge immunity?
Yes, SMAJ120E3/TR13 meets IEC61000-4-5 for secondary lightning surge protection. With a 42 Ω source impedance, it supports Class 2 compliance (up to 1 kV test level); with a 12 Ω source, it qualifies for Class 1 (up to 2 kV), as confirmed in the Microsemi MSC0270A datasheet.
What is the maximum steady-state power dissipation for SMAJ120E3/TR13 on a standard FR4 board?
When mounted on an FR4 printed circuit board with 1 oz copper and Microsemi's recommended footprint, SMAJ120E3/TR13 dissipates up to 5 W continuously at a lead temperature (TL) of 75 °C, or 1.56 W at ambient temperature (TA) of 25 °C.
What does the "TR13" suffix indicate in SMAJ120E3/TR13?
The "TR13" suffix denotes tape-and-reel packaging: 2500 units per 13-inch reel, compliant with EIA-481-1-A standards. This format enables automated pick-and-place assembly and is distinct from the "TR" variant (750 units per 7-inch reel).
SMAJ120E3/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:
- 1
- Bidirectional Channels:
- -
- 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)
SMAJ120E3/TR13 FAQ
1.How can I place an order for SMAJ120E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ120E3/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 SMAJ120E3/TR13 reliable?
The price and inventory of SMAJ120E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ120E3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ120E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ120E3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ120E3/TR13?
SMAJ120E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ120E3/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 SMAJ120E3/TR13?
For technical support, including SMAJ120E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ120E3/TR13 requirements.
6.How does Aetrix verify that SMAJ120E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ120E3/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 SMAJ120E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ120E3/TR13?
All SMAJ120E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ120E3/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 SMAJ120E3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ120E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ120E3/TR13 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
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…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
