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Microchip Technology SMAJ7.0AE3/TR13
- Part No.:
- SMAJ7.0AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.0AE3/TR13.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,642
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Product details
Overview
SMAJ7.0AE3/TR13 from Microsemi is a unidirectional surface-mount Transient Voltage Suppressor (TVS) designed for primary overvoltage protection of DC power rails and signal lines. It features a 7.0 V reverse standoff voltage (VWM), 7.78 V minimum breakdown voltage (VBR) at 10 mA, 12.0 V maximum clamping voltage (VC) at 41.7 A peak pulse current, and 500 W peak pulse power rating per 10/1000 µs waveform-used in industrial power supply input stages and automotive body control modules.
For engineers reviewing the SMAJ7.0AE3/TR13 datasheet, SMAJ7.0AE3/TR13 pinout, SMAJ7.0AE3/TR13 application, or SMAJ7.0AE3/TR13 equivalent, key selection criteria include clamping voltage margin relative to protected IC's absolute maximum rating, IEC 61000-4-2 ESD immunity compliance, unidirectional polarity requirement, and DO-214AC package thermal performance on FR4 PCBs.
Technical Context
This TVS operates as a silicon avalanche diode with fast response (<100 ps theoretical turn-on time), enabling suppression of electrostatic discharge (IEC 61000-4-2 Level 4), electrical fast transients (IEC 61000-4-4), and secondary lightning surges (IEC 61000-4-5 with 42 Ω source impedance up to Class 4). Its unidirectional configuration provides forward conduction path during overvoltage events while blocking reverse leakage below 1 µA at 7.0 V.
The device is rated for -65 °C to +150 °C operating temperature, exhibits 15 °C/W junction-to-lead thermal resistance, and delivers 5 W steady-state power dissipation at 75 °C lead temperature-enabling reliable operation in thermally constrained SMT layouts with recommended DO-214AC footprint per Microsemi's pad layout spec.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse working voltage before clamping begins; sets upper limit for protected circuit's normal operating voltage. |
| VBR min @ IBR | 7.78 V @ 10 mA - Minimum voltage at which avalanche breakdown initiates; ensures predictable triggering above nominal rail. |
| VC @ IPP | 12.0 V @ 41.7 A - Maximum clamped voltage during 10/1000 µs surge; must stay below downstream IC's absolute max rating. |
| PPP | 500 W - Peak pulse power handling capability; defines survivability against standardized transient waveforms. |
| ID @ VWM | <1 µA - Reverse standby leakage current at 7.0 V; negligible power loss and no impact on low-power sensor biasing. |
| tclamp | <100 ps - Theoretical turn-on delay; enables effective suppression of sub-nanosecond ESD events before damage occurs. |
| TJ range | -65 °C to +150 °C - Full operational temperature envelope; supports under-hood automotive and industrial ambient conditions. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, void-free thermosetting epoxy case with matte-tin RoHS-compliant plating; cathode indicated by band on body; weight 0.064 g; moisture sensitivity level (MSL) 1 - no dry pack required.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection to protected line | Connected to signal/power line being protected; forms current path to ground during overvoltage event. |
| Cathode | High-side connection to ground reference | Marked by band; ties to system ground plane; establishes reference for clamping action and defines unidirectional polarity. |
Key Features
| Feature | Design Value |
|---|---|
| 500 W peak pulse power | Enables robust protection against IEC 61000-4-5 secondary lightning surges (Class 4, 42 Ω source) without derating at 25 °C. |
| 12.0 V clamping at 41.7 A | Provides 1.7× margin over 7.0 V rail, ensuring safe operation of 12 V tolerant logic and analog front-ends. |
| DO-214AC package | Offers 15 °C/W junction-to-lead thermal resistance and compatibility with standard SMT reflow profiles (260 °C/10 s). |
| RoHS-compliant "e3" suffix | Meets EU Directive 2011/65/EU with annealed matte-tin plating; eliminates lead-based solder compatibility concerns. |
| Unidirectional construction | Blocks reverse leakage (<1 µA) while allowing forward conduction during positive transients-ideal for DC-biased lines. |
Applications
| Industrial Power Input Protection | Automotive Body Control Module (BCM) |
|---|---|
|
Use Scenario: 12 V DC input stage of programmable logic controllers exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS placed between input rail and chassis ground to clamp transients before they reach upstream DC-DC converters. Use Value: Limits voltage excursion to ≤12.0 V during 41.7 A surges, preventing latch-up or gate oxide rupture in 16 V-rated buck controllers. |
Use Scenario: LIN bus transceiver power supply line in door module subjected to ESD and battery reversal events. IC Role / Device Role / Timing Role: Standoff-rated TVS connected anode-to-rail, cathode-to-ground to absorb ±8 kV contact ESD per IEC 61000-4-2. Use Value: Sub-100 ps response ensures clamping before LIN PHY IC's internal protection triggers, reducing stress on integrated ESD diodes. |
| Telecom Remote Power Feeds | Medical Sensor Interface Protection |
|
Use Scenario: 48 V PoE-powered remote radio unit with sensitive RF front-end vulnerable to induced surges. IC Role / Device Role / Timing Role: Primary TVS on DC input rail, coordinated with secondary GDT or MOV for multi-stage surge coordination. Use Value: 500 W rating allows single-device handling of 10/1000 µs surges up to 41.7 A, simplifying BOM and board space vs. stacked devices. |
Use Scenario: Low-voltage analog sensor node (e.g., thermistor bridge) in portable diagnostic equipment exposed to hospital-grade ESD. IC Role / Device Role / Timing Role: Rail-to-ground TVS on 3.3 V supply, selected for ultra-low leakage (<1 µA) to avoid offset drift in precision amplifiers. Use Value: Maintains <0.1 µA standby current at 3.3 V (well below VWM), eliminating measurement error from TVS shunt path. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.0AHE3/TR13 | Same electrical specs but includes high-reliability screening (100% temp cycling, HTRB, surge testing) per MIL-PRF-19500 JANTX requirements. | Required for avionics, defense, or mission-critical industrial systems where extended reliability validation is mandated. | Select SMAJ7.0AHE3/TR13 when full MIL-spec screening and traceable test data are contractually required. |
| SMBJ7.0A-E3/52 | Same VWM, VBR, VC, but lower 600 W PPP rating and SMB (DO-214AA) package with higher 25 °C/W junction-to-ambient resistance. | Better suited for lower-power signal lines or space-constrained layouts where 500 W is excessive and thermal mass is limited. | Choose SMBJ7.0A-E3/52 only if board area is critical and peak surge energy remains within 600 W capability. |
Compared with SMAJ7.0AE3/TR13, SMAJ7.0AHE3/TR13 adds verified high-reliability screening without changing electrical behavior, while SMBJ7.0A-E3/52 trades package thermal performance and peak power for smaller footprint-neither is pin-compatible due to differing DO-214AC vs. DO-214AA land patterns.
Availability
SMAJ7.0AE3/TR13 is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, telecom remote power feeds, and medical sensor interface protection requiring stable component supply across long-lifecycle programs.
Supply support for SMAJ7.0AE3/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 developed specifically for surface-mount transient suppression in harsh environments, emphasizing robust 500 W surge handling, low clamping voltage, and extended temperature operation in DO-214AC packaging.
FAQ
What is the clamping voltage of SMAJ7.0AE3/TR13 at its rated peak pulse current?
The SMAJ7.0AE3/TR13 has a maximum clamping voltage (VC) of 12.0 V when subjected to its rated 41.7 A peak pulse current (IPP) under the standard 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and ensures protected circuits remain within safe voltage limits during transient events.
Is SMAJ7.0AE3/TR13 unidirectional or bidirectional?
SMAJ7.0AE3/TR13 is a unidirectional Transient Voltage Suppressor, indicated by the absence of "C" or "CA" in its part number suffix. It conducts only in the reverse direction (cathode to anode) during overvoltage events and blocks current in the forward direction, making it suitable for DC-biased applications like power supply inputs.
Does SMAJ7.0AE3/TR13 comply with RoHS directives?
Yes, SMAJ7.0AE3/TR13 complies with RoHS Directive 2011/65/EU, as confirmed by the "e3" suffix in its part number. It uses annealed matte-tin plating on C-bend leads and meets all substance restrictions, including lead, cadmium, mercury, hexavalent chromium, PBB, and PBDE.
What is the maximum steady-state power dissipation for SMAJ7.0AE3/TR13 on a standard FR4 PCB?
When mounted on an FR4 printed circuit board with 1 oz copper and Microsemi's recommended footprint, SMAJ7.0AE3/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-values critical for thermal design validation in enclosed enclosures.
Can SMAJ7.0AE3/TR13 be used for IEC 61000-4-5 lightning surge protection?
Yes, SMAJ7.0AE3/TR13 is rated for secondary lightning surge protection per IEC 61000-4-5 with 42 Ω source impedance up to Class 4 (VWM ≤ 12 V), covering the SMAJ5.0 to SMAJ12A family. Its 500 W peak pulse power and 12.0 V clamping voltage ensure compliance when applied per Microsemi's application guidelines.
SMAJ7.0AE3/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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 41.7A
- 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)
SMAJ7.0AE3/TR13 FAQ
1.How can I place an order for SMAJ7.0AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.0AE3/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 SMAJ7.0AE3/TR13 reliable?
The price and inventory of SMAJ7.0AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ7.0AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ7.0AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.0AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.0AE3/TR13?
SMAJ7.0AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.0AE3/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 SMAJ7.0AE3/TR13?
For technical support, including SMAJ7.0AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.0AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ7.0AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ7.0AE3/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 SMAJ7.0AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ7.0AE3/TR13?
All SMAJ7.0AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.0AE3/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 SMAJ7.0AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ7.0AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ7.0AE3/TR13 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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