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Microchip Technology SMAJ7.0CAE3/TR13
- Part No.:
- SMAJ7.0CAE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ7.0CAE3/TR13.pdf
- Description:
- TVS DIODE 7VWM 12VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,524
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Product details
Overview
SMAJ7.0CAE3/TR13 from Microsemi is a bidirectional surface-mount 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 (IPP), and 500 W peak pulse power rating per 10/1000 µs waveform - deployed in industrial I/O, telecom interfaces, and automotive body electronics.
For engineers reviewing the SMAJ7.0CAE3/TR13 datasheet, SMAJ7.0CAE3/TR13 pinout, SMAJ7.0CAE3/TR13 application, or SMAJ7.0CAE3/TR13 equivalent, key selection criteria include bidirectional clamping capability, RoHS-compliant matte-tin plating, DO-214AC package compatibility, IEC61000-4-2/4-4/4-5 compliance, and tape-and-reel packaging (TR13) for automated assembly.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with <100 ps theoretical response time for unidirectional mode and <5 ns for bidirectional conduction - enabling effective suppression of fast-rising ESD events (±15 kV contact, ±25 kV air per IEC61000-4-2). Its clamping behavior is defined by silicon avalanche junction characteristics, not Zener-based regulation.
The device sustains 500 W peak pulse power at 25°C with 0.01% duty cycle, derates to 1.56 W steady-state power at 25°C ambient on FR4 (1 oz Cu), and maintains operation from –65°C to +150°C. Thermal resistance is 80°C/W junction-to-ambient under standard mounting conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected line voltage. |
| VBR min @ IBR | 7.78 V @ 10 mA - Minimum voltage at which avalanche conduction begins; ensures reliable triggering above normal operating range. |
| VC @ IPP | 13.3 V @ 37.8 A - Clamped voltage during 10/1000 µs surge; determines maximum stress imposed on downstream ICs. |
| PPP | 500 W - Peak pulse power handling capacity; defines survivability against standardized lightning-induced surges (IEC61000-4-5). |
| IPP | 37.8 A - Peak current supported at VC; correlates directly with surge energy (W × s) absorption capability. |
| ID @ VWM | 200 µA max - Reverse leakage current at standoff voltage; low value minimizes standby power loss and avoids false triggering. |
| Package | DO-214AC (SMA) - Industry-standard surface-mount outline with wide leads for thermal dissipation and mechanical robustness in reflow assembly. |
Pinout & Package
DO-214AC (SMA) package: molded thermosetting epoxy case (UL94V-0), C-bend leads with RoHS-compliant annealed matte-tin plating, cathode band omitted for bidirectional configuration, marking "7.0CAe3" on body, weight 0.064 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction terminals | No polarity distinction; either terminal serves as input or return path depending on transient polarity - enables single-device protection of AC-coupled or floating lines. |
| Case / Body | Non-electrical mechanical interface | Thermally conductive epoxy body transfers heat to PCB copper; no electrical connection - requires no grounding via case. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables symmetrical overvoltage protection on AC signals, differential buses (e.g., RS-485), or ungrounded DC rails without polarity constraints. |
| RoHS-compliant "e3" suffix | Meets EU Directive 2011/65/EU with annealed matte-tin plating - eliminates lead content while maintaining solderability and corrosion resistance. |
| Tape-and-reel "TR13" packaging | 2500 units per 13-inch reel per EIA-481-1-A - optimized for high-volume SMT placement with consistent feed reliability and traceable lot control. |
| IEC61000-4-5 Class 4 support | Validated for secondary lightning surges with 12 Ω source impedance up to 12 VWM - SMAJ7.0CAE3/TR13 qualifies for Class 4 (highest severity) in this impedance class. |
| Moisture sensitivity Level 1 | No dry-pack or baking required prior to reflow - simplifies manufacturing flow and reduces handling cost versus higher MSL-rated components. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting 5–12 V analog sensor outputs (e.g., pressure, temperature) from load dump transients and ESD during service disconnect. IC Role / Device Role: Bidirectional clamping element placed between sensor output and microcontroller ADC input, referenced to local ground. Use Value: Limits transient voltage to ≤13.3 V, preventing latch-up or gate oxide damage in 3.3 V/5 V ADC front-ends while surviving ≥37.8 A surge events. | Use Scenario: Safeguarding LIN bus transceivers and switch inputs in door modules exposed to cable harness ESD and battery reversal spikes. IC Role / Device Role: Line-side TVS mounted at connector entry point, shunting surges to chassis ground before reaching transceiver IC. Use Value: Provides <5 ns response to ±8 kV ESD (IEC61000-4-2) and clamps 10/1000 µs surges to 13.3 V - preserving signal integrity and meeting OEM EMC requirements. |
| Telecom Power Feeding | Medical Patient Monitor Port |
Use Scenario: Overvoltage protection on 48 V DC power feeds for PoE-powered remote units subjected to induced lightning surges. IC Role / Device Role: Primary surge clamp on DC input rail upstream of DC-DC converter, rated for 500 W peak pulse power. Use Value: Absorbs up to 500 W transient energy (10/1000 µs) without failure, maintaining system uptime during outdoor installation lightning events. | Use Scenario: ESD protection on isolated USB or serial diagnostic ports connected to patient-worn sensors. IC Role / Device Role: Bidirectional TVS bridging data lines (D+/D−) to isolate ground, compliant with medical-grade creepage/clearance requirements. Use Value: Delivers <100 ps response to human-body-model ESD, limiting voltage excursion to safe levels for isolated barrier ICs without adding capacitance-induced signal distortion. |
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 | Unidirectional version with cathode band marking; identical VWM, VBR, VC, and PPP ratings but asymmetric conduction. | Requires explicit polarity assignment; unsuitable for AC or floating lines where voltage polarity reverses. | Select SMAJ7.0AHE3/TR13 only when protecting unidirectional DC rails with known ground reference and polarity. |
| SMBJ7.0CA/TR13 | Same electrical specs but in larger DO-214AA (SMB) package; 600 W peak pulse power rating vs. 500 W. | Higher thermal mass allows greater surge repetition tolerance; footprint incompatible with SMA layout. | Choose SMBJ7.0CA/TR13 when board space permits and higher surge endurance (e.g., outdoor telecom) is required. |
Compared with SMAJ7.0AHE3/TR13, the bidirectional SMAJ7.0CAE3/TR13 eliminates polarity dependency in layout and supports AC-coupled interfaces; versus SMBJ7.0CA/TR13, it offers identical protection performance in a smaller footprint but with lower thermal margin for repeated surges.
Availability
SMAJ7.0CAE3/TR13 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, telecom power feeding, and medical diagnostic port protection requiring stable component supply and full RoHS compliance.
Supply support for SMAJ7.0CAE3/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 ICs, RF solutions, and discrete protection devices for aerospace, defense, and industrial markets.
The SMAJ series was engineered for surface-mount transient suppression in space-constrained, high-surge environments - delivering 500 W pulse capability in the compact DO-214AC package while meeting stringent IEC and MIL-spec screening options.
FAQ
What does the "CA" suffix indicate in SMAJ7.0CAE3/TR13?
The "CA" suffix in SMAJ7.0CAE3/TR13 denotes a bidirectional transient voltage suppressor configuration. Unlike unidirectional variants (e.g., SMAJ7.0A), the CA version provides symmetrical clamping in both forward and reverse directions - making it suitable for AC signals, differential buses, or any application where voltage polarity may reverse. This eliminates the need for polarity-aware placement during PCB assembly.
Is SMAJ7.0CAE3/TR13 compliant with IEC61000-4-5 for lightning surge protection?
Yes, SMAJ7.0CAE3/TR13 is validated for secondary lightning surge protection per IEC61000-4-5. With a 12 Ω source impedance, it meets Class 4 requirements (highest severity level for this impedance), and with a 42 Ω source, it qualifies for Class 1. Its 13.3 V clamping voltage at 37.8 A ensures downstream circuitry remains within safe operating limits during standardized surge waveforms.
What is the meaning of the "TR13" suffix in SMAJ7.0CAE3/TR13?
The "TR13" suffix in SMAJ7.0CAE3/TR13 indicates tape-and-reel packaging on a 13-inch reel containing 2500 units, conforming to EIA-481-1-A standards. This format supports automated SMT placement systems, ensures consistent feeding accuracy, and enables full lot traceability - critical for high-volume manufacturing and quality-controlled production programs.
Does SMAJ7.0CAE3/TR13 require moisture-sensitive handling precautions?
No, SMAJ7.0CAE3/TR13 has a moisture sensitivity level (MSL) of 1 per IPC/JEDEC J-STD-020B, meaning it does not require dry packing, baking, or floor-life controls before reflow soldering. This simplifies inventory management and eliminates pre-assembly processing steps - reducing cost and risk of handling damage in production environments.
How does the "e3" designation affect the plating and compliance of SMAJ7.0CAE3/TR13?
The "e3" designation in SMAJ7.0CAE3/TR13 specifies RoHS-compliant annealed matte-tin plating on the C-bend leads, replacing traditional tin-lead finishes. This meets EU Directive 2011/65/EU requirements, provides excellent solderability under lead-free reflow profiles (up to 260°C for 10 s), and delivers long-term corrosion resistance - essential for industrial and automotive applications with extended field life.
SMAJ7.0CAE3/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:
- 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)
SMAJ7.0CAE3/TR13 FAQ
1.How can I place an order for SMAJ7.0CAE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ7.0CAE3/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 SMAJ7.0CAE3/TR13 reliable?
The price and inventory of SMAJ7.0CAE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ7.0CAE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ7.0CAE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ7.0CAE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ7.0CAE3/TR13?
SMAJ7.0CAE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ7.0CAE3/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 SMAJ7.0CAE3/TR13?
For technical support, including SMAJ7.0CAE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ7.0CAE3/TR13 requirements.
6.How does Aetrix verify that SMAJ7.0CAE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ7.0CAE3/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 SMAJ7.0CAE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ7.0CAE3/TR13?
All SMAJ7.0CAE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ7.0CAE3/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 SMAJ7.0CAE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ7.0CAE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ7.0CAE3/TR13 Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
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D12V0L1B2LP-7B
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