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Microchip Technology SMAJ7.0CE3/TR13
- Part No.:
- SMAJ7.0CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.0CE3/TR13.pdf
- Description:
- TVS DIODE 7VWM 13.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,692
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Product details
Overview
SMAJ7.0CE3/TR13 from Microsemi is a surface-mount bidirectional transient voltage suppressor (TVS) designed for ESD, EFT, and secondary lightning surge protection in DC power rails and signal lines. It features a 7.0 V reverse standoff voltage (VWM), 7.78 V minimum breakdown voltage (VBR), 13.3 V maximum clamping voltage (VC) at 37.8 A peak pulse current, and 500 W peak pulse power rating per 10/1000 µs waveform.
For engineers reviewing the SMAJ7.0CE3/TR13 datasheet, SMAJ7.0CE3/TR13 pinout, SMAJ7.0CE3/TR13 application, or SMAJ7.0CE3/TR13 equivalent, key selection criteria include bidirectional clamping capability, IEC61000-4-2/4-4/4-5 compliance, DO-214AC package compatibility, low standby leakage (<500 µA @ VWM), and RoHS-compliant matte-tin plating.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling robust protection of AC-coupled or floating interfaces without polarity constraints. Its <100 ps theoretical response time for unidirectional mode (and <5 ns for bidirectional) ensures effective suppression of fast-rising ESD events per IEC61000-4-2 Level 4 (±15 kV contact).
Rated for 500 W peak pulse power at 10/1000 µs, it delivers 37.8 A peak pulse current with 13.3 V clamping-critical for safeguarding 5 V–12 V logic interfaces and analog front-ends. The device sustains operation from –65 °C to +150 °C and exhibits 15 °C/W junction-to-lead thermal resistance when mounted on FR4 with recommended footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V reverse standoff voltage - sets maximum continuous operating voltage before conduction begins |
| VBR min | 7.78 V at 10 mA - guarantees reliable avalanche initiation above system operating voltage |
| VC @ IPP | 13.3 V at 37.8 A - limits protected circuit voltage during 500 W transient, preserving downstream ICs |
| IPP | 37.8 A peak pulse current - supports IEC61000-4-5 Class 4 (2 kV, 42 Ω source) secondary lightning immunity |
| PPP | 500 W peak pulse power - enables single-device protection against high-energy transients without derating |
| ID @ VWM | <500 µA - ensures negligible leakage in battery-powered or high-impedance sensor circuits |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with wide leads for thermal dissipation and mechanical reliability |
Pinout & Package
DO-214AC (SMA) package: void-free thermosetting epoxy body (UL94V-0), C-bend leads with RoHS-compliant annealed matte-tin plating, cathode band omitted for bidirectional construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No polarity marking; interchangeable connection - protects AC signals or floating buses without orientation dependency |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of differential pairs, AC lines, and ungrounded interfaces without polarity concerns |
| IEC61000-4-5 Class 4 compliance | Validated for 2 kV surge immunity with 42 Ω source impedance - meets industrial port-level requirements |
| RoHS-compliant "e3" suffix | Matte-tin plating per J-STD-020B Level 1 moisture sensitivity - no dry pack required, compatible with standard reflow |
| 500 W 10/1000 µs rating | Single-device solution for high-energy transients - eliminates need for parallel TVS arrays in space-constrained designs |
| –65 °C to +150 °C operation | Supports under-hood automotive, outdoor telecom, and industrial control environments without derating |
Applications
| Industrial PLC I/O Protection | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 24 V digital input channels from inductive kickback and load dump transients in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional TVS placed between input terminal and ground to clamp positive/negative surges before reaching optocoupler or MCU GPIO. Use Value: 13.3 V clamping ensures microcontroller I/O remains below absolute maximum ratings during 37.8 A transients, preventing latch-up or permanent damage. |
Use Scenario: Safeguarding LIN bus transceivers and sensor inputs in body electronics exposed to ISO 7637-2 pulses and ESD. IC Role / Device Role / Timing Role: TVS connected across LIN data line and chassis ground to suppress ±15 kV ESD (IEC61000-4-2) and 100 V/50 ms load dump spikes. Use Value: Sub-5 ns response time and symmetrical clamping maintain signal integrity on bidirectional LIN while meeting automotive EMC test requirements. |
| USB 2.0 Data Line Protection | DC Power Rail Clamping |
Use Scenario: Shielding USB D+/D− lines from ESD events in portable medical devices and industrial HMI panels. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at USB connector to limit transient voltage before reaching USB PHY. Use Value: 7.0 V standoff allows full USB 2.0 signal swing (0–3.6 V) while clamping ESD to 13.3 V - avoids false triggering and preserves eye diagram integrity. |
Use Scenario: Suppressing switching noise and inductive spikes on 5 V or 12 V DC power distribution networks in embedded systems. IC Role / Device Role / Timing Role: TVS installed between rail and ground near power entry point to shunt surge energy away from regulators and downstream loads. Use Value: 500 W peak power rating handles repetitive 10/1000 µs transients from relay coils or motor drivers without degradation over lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.0CA | Same electrical specs and DO-214AC package; lacks "e3" RoHS suffix and TR tape-and-reel packaging | Non-RoHS version suitable for legacy military or aerospace programs requiring tin-lead plating | Select SMAJ7.0CA only if RoHS exemption applies and tape-and-reel delivery is not required |
| SMBJ7.0CA | Same VWM, VBR, VC; lower 600 W peak power rating but larger DO-214AA (SMB) package | Higher thermal mass supports higher average surge duty cycles; requires PCB layout change due to larger footprint | Choose SMBJ7.0CA when sustained surge repetition or enhanced thermal margin outweighs space constraints |
Compared with SMAJ7.0CE3/TR13, SMAJ7.0CA omits RoHS compliance and reel packaging, while SMBJ7.0CA trades compact DO-214AC size for greater thermal capacity in DO-214AA - making SMAJ7.0CE3/TR13 optimal for RoHS-aligned, space-constrained industrial and automotive PCBs requiring verified tape-and-reel supply.
Availability
SMAJ7.0CE3/TR13 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, automotive body control modules, USB 2.0 data line hardening, and DC power rail clamping requiring stable component supply across production lifecycles.
Supply support for SMAJ7.0CE3/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, high surge tolerance, and extended temperature operation - targeting mission-critical power and interface protection.
FAQ
What does the "CE3/TR13" suffix indicate in SMAJ7.0CE3/TR13?
The "C" denotes bidirectional configuration, "E3" specifies RoHS-compliant matte-tin plating per J-STD-020B Level 1, and "TR13" indicates tape-and-reel packaging on a 13-inch reel (2500 units). This full suffix confirms SMAJ7.0CE3/TR13 meets environmental compliance, moisture sensitivity, and automated assembly requirements out of the box.
Is SMAJ7.0CE3/TR13 suitable for protecting USB 2.0 differential pairs?
Yes - SMAJ7.0CE3/TR13's bidirectional symmetry, 7.0 V standoff, and 13.3 V clamping at 37.8 A make it appropriate for USB 2.0 data line protection. Its DO-214AC package allows placement directly at the connector, and its low leakage (<500 µA) prevents signal distortion, provided board layout minimizes parasitic inductance to preserve sub-5 ns response.
How does SMAJ7.0CE3/TR13 perform under IEC61000-4-5 surge testing?
SMAJ7.0CE3/TR13 is rated for IEC61000-4-5 Class 4 (2 kV, 42 Ω source impedance) secondary lightning protection. At 37.8 A peak pulse current and 13.3 V clamping, it limits induced surge voltages to safe levels for 5 V–12 V logic interfaces - validated in Microsemi's characterization per Figure 2 of MSC0270A Rev L.
What is the thermal resistance of SMAJ7.0CE3/TR13, and how does it affect PCB layout?
SMAJ7.0CE3/TR13 has 15 °C/W junction-to-lead thermal resistance when soldered to FR4 with the recommended footprint. To maintain reliability under repeated surges, designers must use the specified pad layout (Page 5, MSC0270A) - including minimum 1.70 mm × 3.99 mm copper area per lead - to ensure adequate heat dissipation and avoid thermal runaway.
Can SMAJ7.0CE3/TR13 replace SMAJ7.0A in a design?
No - SMAJ7.0A is unidirectional with cathode marking and forward surge capability (40 A, 8.3 ms), while SMAJ7.0CE3/TR13 is bidirectional with no polarity marking and no specified forward surge rating. Substituting SMAJ7.0CE3/TR13 for SMAJ7.0A would compromise protection on DC-biased lines and invalidate forward conduction validation; always verify circuit topology before interchange.
SMAJ7.0CE3/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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 13.3V
- Current - Peak Pulse (10/1000µs):
- 37.8A
- 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)
SMAJ7.0CE3/TR13 FAQ
1.How can I place an order for SMAJ7.0CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.0CE3/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 SMAJ7.0CE3/TR13 reliable?
The price and inventory of SMAJ7.0CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ7.0CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ7.0CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.0CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.0CE3/TR13?
SMAJ7.0CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.0CE3/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 SMAJ7.0CE3/TR13?
For technical support, including SMAJ7.0CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.0CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ7.0CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ7.0CE3/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 SMAJ7.0CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ7.0CE3/TR13?
All SMAJ7.0CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.0CE3/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 SMAJ7.0CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ7.0CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ7.0CE3/TR13 Tags
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