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Microchip Technology SMAJ7.5CE3/TR13
- Part No.:
- SMAJ7.5CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.5CE3/TR13.pdf
- Description:
- TVS DIODE 7.5VWM 14.3VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,920
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Product details
Overview
SMAJ7.5CE3/TR13 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for primary and secondary lightning surge protection in DC power rails and signal lines. It features a 7.5 V working peak standoff voltage (VWM), 8.33 V minimum breakdown voltage (VBR), 14.3 V maximum clamping voltage (VC) at 35 A peak pulse current, and 500 W peak pulse power rating per 10/1000 µs waveform - suitable for IEC61000-4-5 Class 4 (12 Ω source) and ESD/EFT compliance per IEC61000-4-2/4-4.
For engineers reviewing the SMAJ7.5CE3/TR13 datasheet, SMAJ7.5CE3/TR13 pinout, SMAJ7.5CE3/TR13 application, or SMAJ7.5CE3/TR13 equivalent, this device serves as a RoHS-compliant, tape-and-reel packaged (TR13) TVS diode with DO-214AC (SMA) package, bidirectional polarity, and verified clamping performance under repetitive surge stress - critical for industrial power input stages, telecom interface protection, and automotive body electronics.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling robust protection of AC-coupled or floating signal paths without polarity constraints. Its sub-100 ps theoretical response time for unidirectional mode (and <5 ns for bidirectional operation) ensures suppression before sensitive downstream circuitry sustains damage from fast-rising transients.
The device delivers 500 W peak pulse power dissipation at 25°C with 10/1000 µs waveform, supported by low thermal resistance (15 °C/W junction-to-lead) and a void-free UL94V-0 epoxy case. It maintains stable electrical characteristics over -65°C to +150°C operating temperature range and exhibits ≤1 μA standby leakage at VWM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff) | 7.5 V - Maximum continuous reverse voltage before conduction begins; sets operating margin for 5 V–6 V DC rails. |
| VBR (Min @ IBR) | 8.33 V @ 1 mA - Confirmed avalanche initiation threshold; guarantees reliable turn-on above nominal rail. |
| VC @ IPP | 14.3 V @ 35 A - Clamped voltage during 10/1000 µs surge; limits stress on protected ICs to safe levels. |
| PPP | 500 W - Peak surge energy handling capacity; supports repeated surges up to 0.01% duty cycle. |
| IPP | 35 A - Maximum non-destructive surge current; validated per Figure 2 of MSC0270A Rev L. |
| ID @ VWM | <1 μA - Ultra-low leakage ensures minimal power loss and no interference in high-impedance sensing nodes. |
| Package | DO-214AC (SMA) - Industry-standard surface-mount outline with J-bend leads; compatible with automated pick-and-place and reflow. |
Pinout & Package
DO-214AC (SMA) package with two terminals: symmetrical bidirectional configuration; no cathode marking - polarity is non-directional. Case is void-free thermosetting epoxy meeting UL94V-0; terminals feature annealed matte-tin plating per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Both terminals function identically; connects between protected line and ground (or between differential lines) without orientation dependency. |
| Case / Body | Thermal & mechanical interface | Non-conductive UL94V-0 epoxy body provides insulation and structural integrity; transfers heat to PCB copper via leadframe contact. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional architecture | Enables protection of AC signals, RS-485 buses, and floating interfaces without polarity-sensitive layout constraints. |
| IEC61000-4-5 Class 4 compliance (12 Ω source) | Validated for secondary lightning surges up to 1 kV open-circuit / 42 Ω source impedance; meets industrial equipment immunity requirements. |
| RoHS-compliant "e3" suffix | Lead-free matte-tin plating and halogen-free epoxy meet EU RoHS Directive 2011/65/EU and JEDEC J-STD-020B Level 1 moisture sensitivity. |
| Tape-and-reel packaging (TR13) | 2500 units per 13-inch reel per EIA-481-1-A standard - optimized for high-volume SMT assembly with consistent feed reliability. |
| Fast clamping response | <5 ns turn-on for bidirectional mode ensures suppression precedes propagation delay of most microcontrollers and transceivers. |
Applications
| Industrial Power Input Protection | Telecom Interface Surge Suppression |
|---|---|
Use Scenario: 24 V DC power entry point in programmable logic controllers exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Primary surge shunt element placed between VIN and chassis ground, clamping transients before they reach DC-DC converters and MCU power domains. Use Value: Limits voltage excursion to ≤14.3 V during 35 A surges, preventing latch-up or permanent damage to 24 V-rated regulators and supervisors. |
Use Scenario: RS-485 data lines in outdoor base stations subjected to induced lightning currents and EFT bursts. IC Role / Device Role / Timing Role: Bidirectional line-to-line and line-to-ground protector on differential pair, absorbing common-mode and differential-mode transients simultaneously. Use Value: Maintains signal integrity by clamping within 5 ns while adding <1 pF capacitance per terminal - negligible impact on 10 Mbps bus timing. |
| Automotive Body Control Module (BCM) | Consumer USB Port ESD Protection |
Use Scenario: LIN bus and sensor supply lines in BCMs operating in harsh vehicle environments with battery transients and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Secondary-level TVS deployed downstream of main fuse and upstream of LIN transceivers and Hall-effect sensors. Use Value: Withstands 10/1000 µs surges up to 500 W and operates reliably from −65°C to +150°C - matching automotive under-hood thermal profiles. |
Use Scenario: VBUS and D+/D− lines of USB 2.0 ports in smart home hubs exposed to user-handling ESD events. IC Role / Device Role / Timing Role: Fast-response bidirectional clamp meeting IEC61000-4-2 ±15 kV contact discharge requirement. Use Value: Sub-5 ns clamping action prevents ESD-induced latch-up in USB PHY ICs while maintaining <1 μA leakage at 5 V nominal VWM. |
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 SMAJ7.5CA | Identical VWM, VBR, VC, and PPP; same DO-214AC package but non-RoHS tin-lead plating and no "e3" designation. | Approved for legacy industrial designs requiring MIL-PRF-19500 screening (JANTX), not RoHS-mandated production. | Select when avionics-grade screening (MX prefix) or tin-lead solder compatibility is required; otherwise SMAJ7.5CE3/TR13 preferred for modern RoHS compliance. |
| ON Semiconductor SMAJ7.5A | Unidirectional variant (A suffix); requires correct polarity placement and adds forward voltage drop (~3.5 V) during positive surges. | Suitable only for DC rails with known polarity; cannot protect AC or floating differential signals. | Choose only if system topology enforces strict unidirectional current flow and polarity-aware layout is feasible; bidirectional SMAJ7.5CE3/TR13 eliminates orientation risk. |
Compared with SMAJ7.5CA and SMAJ7.5A, the SMAJ7.5CE3/TR13 uniquely combines RoHS compliance, bidirectional symmetry, and TR13 tape-and-reel packaging - making it optimal for high-volume, environmentally regulated, and layout-flexible surge protection in industrial and consumer electronics.
Availability
SMAJ7.5CE3/TR13 is available at Aetrix Electronics and suitable for industrial power input protection, telecom interface surge suppression, and automotive body control module designs requiring stable component supply, full RoHS compliance, and verified IEC61000-4-5 Class 4 performance.
Supply support for SMAJ7.5CE3/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 space-constrained, high-surge environments - emphasizing robust clamping, thermal stability, and standardized DO-214AC compatibility across 5.0–170 V standoff range.
FAQ
What is the clamping voltage of SMAJ7.5CE3/TR13 at its rated peak pulse current?
The SMAJ7.5CE3/TR13 has a maximum clamping voltage (VC) of 14.3 V at 35 A peak pulse current (IPP) under the standard 10/1000 µs waveform. This value is measured per Figure 2 in the MSC0270A Rev L datasheet and defines the upper voltage limit imposed on protected circuits during surge events - ensuring downstream ICs rated for ≥15 V absolute maximum survive transient exposure. The SMAJ7.5CE3/TR13 maintains this clamping performance across its full operating temperature range.
Is SMAJ7.5CE3/TR13 unidirectional or bidirectional?
SMAJ7.5CE3/TR13 is a bidirectional transient voltage suppressor, indicated by the "C" suffix in its part number. Unlike unidirectional variants (e.g., SMAJ7.5A), it conducts symmetrically in both polarities - making it suitable for AC signal lines, RS-485 buses, and any application where voltage polarity reversal or floating references occur. The device has no cathode band marking, confirming its bidirectional construction per Microsemi's documentation.
What package type does SMAJ7.5CE3/TR13 use, and is it compatible with standard SMT processes?
SMAJ7.5CE3/TR13 uses the DO-214AC (SMA) surface-mount package with J-bend leads and void-free UL94V-0 epoxy body. It is fully compatible with standard SMT reflow processes, including peak temperatures up to 260°C for 10 seconds per MIL-STD-750 Method 2026. Its footprint matches JEDEC MS-013AA, and the TR13 tape-and-reel format (2500 units/reel) supports automated pick-and-place systems without modification - confirmed in the package dimension drawing on page 5 of MSC0270A Rev L.
Does SMAJ7.5CE3/TR13 meet IEC61000-4-5 for lightning surge immunity?
Yes, SMAJ7.5CE3/TR13 is validated for secondary lightning surge protection per IEC61000-4-5 with both 12 Ω and 42 Ω source impedances. Specifically, it qualifies for Class 4 (12 Ω source) and Class 1 (42 Ω source) testing per the manufacturer's classification table on page 1 of MSC0270A Rev L. Its 500 W peak pulse power rating and 14.3 V clamping voltage ensure compliance when used with appropriate PCB layout and grounding - no derating required at 25°C ambient.
What is the maximum steady-state power dissipation of SMAJ7.5CE3/TR13 on a standard FR4 board?
When mounted on a standard FR4 PCB with 1 oz copper and Microsemi's recommended footprint, SMAJ7.5CE3/TR13 dissipates up to 1.56 W continuously at 25°C ambient temperature (TA), or 5 W at 75°C lead temperature (TL). These values are specified in the "Steady-State Power Dissipation" section of the MAXIMUM RATINGS table (page 1, MSC0270A Rev L) and reflect thermal limits under natural convection - critical for thermal design of high-density layouts where multiple TVS devices operate simultaneously.
SMAJ7.5CE3/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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 14.3V
- Current - Peak Pulse (10/1000µs):
- 35A
- 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)
SMAJ7.5CE3/TR13 FAQ
1.How can I place an order for SMAJ7.5CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.5CE3/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 SMAJ7.5CE3/TR13 reliable?
The price and inventory of SMAJ7.5CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ7.5CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ7.5CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.5CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.5CE3/TR13?
SMAJ7.5CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.5CE3/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 SMAJ7.5CE3/TR13?
For technical support, including SMAJ7.5CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.5CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ7.5CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ7.5CE3/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 SMAJ7.5CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ7.5CE3/TR13?
All SMAJ7.5CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.5CE3/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 SMAJ7.5CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ7.5CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ7.5CE3/TR13 Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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