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Microchip Technology SMAJ15CE3/TR13
- Part No.:
- SMAJ15CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ15CE3/TR13.pdf
- Description:
- TVS DIODE 15VWM 26.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,657
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Product details
Overview
SMAJ15CE3/TR13 from Microsemi is a bidirectional surface-mount transient voltage suppressor (TVS) designed for robust ESD, EFT, and secondary lightning surge protection in DC power rails and signal lines. It features a 15 V standoff voltage (VWM), 16.7 V minimum breakdown voltage (VBR), 26.9 V clamping voltage (VC) at 18.8 A peak pulse current, and 500 W peak pulse power rating per 10/1000 µs waveform - deployed in industrial power supplies and automotive body control modules.
For engineers reviewing the SMAJ15CE3/TR13 datasheet, SMAJ15CE3/TR13 pinout, SMAJ15CE3/TR13 application, or SMAJ15CE3/TR13 equivalent, key selection criteria include bidirectional clamping capability, IEC61000-4-2/4-4/4-5 compliance, DO-214AC package thermal performance, and RoHS-compliant matte-tin plating for lead-free 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 transients and induced RF noise. Its clamping behavior is defined by silicon avalanche junction characteristics, not Zener or thyristor mechanisms.
The device is rated for 500 W peak pulse power at 25 °C with 0.01% duty cycle, derated linearly above 25 °C using a 15 °C/W junction-to-lead thermal resistance. It supports steady-state dissipation of 5 W at 75 °C lead temperature when mounted on FR4 with recommended footprint.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V reverse standoff voltage - maximum continuous DC or RMS voltage the device blocks without clamping. |
| VBR min @ IBR | 16.7 V at 1 mA - guaranteed avalanche initiation threshold, ensuring predictable turn-on before system damage. |
| VC @ IPP | 26.9 V at 18.8 A (10/1000 µs) - maximum voltage seen by protected circuit during worst-case surge event. |
| PPP | 500 W peak pulse power - defines energy-handling capacity for transient suppression without failure. |
| ID @ VWM | <1 µA leakage current - ensures negligible standby power loss and no interference with low-power sensor circuits. |
| Operating Temp | –65 °C to +150 °C - supports deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment. |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline with wide leads for enhanced thermal dissipation and mechanical reliability. |
Pinout & Package
DO-214AC (SMA) package: void-free thermosetting epoxy case, UL94V-0 rated; C-bend (modified J-bend) leads with RoHS-compliant annealed matte-tin plating; cathode band omitted on bidirectional variants like SMAJ15CE3/TR13.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction terminals | No polarity marking; interchangeable connection - enables single-component protection of AC-coupled or floating signal lines. |
| Case / Body | Non-electrical thermal path | Thermally coupled to PCB copper via soldered leads; contributes to 15 °C/W junction-to-lead thermal resistance. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and ungrounded power domains without polarity concerns. |
| IEC61000-4-5 Class 4 support | Withstands 42 Ω source impedance lightning surges up to 12 VWM; SMAJ15CE3/TR13 qualifies for Class 3 (24 VWM max) and Class 4 (12 VWM max) per standard. |
| RoHS-compliant "e3" suffix | Matte-tin plating meets JEDEC J-STD-020B Level 1 moisture sensitivity - eliminates dry-pack requirement and supports lead-free reflow (260 °C/10 s). |
| 500 W 10/1000 µs rating | Provides higher surge margin than 400 W SMAJ series - critical for industrial PLC I/O modules exposed to inductive load switching. |
| Low clamping ratio (VC/VBR) | 1.61 ratio (26.9 V / 16.7 V) ensures minimal overvoltage stress on downstream ICs during clamping - improves system-level reliability. |
Applications
| Industrial Power Input Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: 24 V DC input rail in programmable logic controllers subjected to load dump and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional TVS placed between VIN and GND to clamp positive/negative transients before they reach DC-DC converters and microcontrollers. Use Value: 26.9 V clamping voltage limits stress on 3.3 V/5 V logic supply rails; DO-214AC thermal design sustains repeated 500 W surges without degradation. |
Use Scenario: LIN bus transceiver power line in door module exposed to battery reversal and jump-start transients. IC Role / Device Role / Timing Role: Primary surge protector on VBAT line feeding LIN transceiver ICs, operating alongside ceramic capacitors for high-frequency filtering. Use Value: Bidirectional symmetry handles both +12 V overvoltage and –12 V reverse-battery events; 1 µA leakage avoids battery drain in sleep mode. |
| RS-485 Data Line Protection | Outdoor Telecom Power Interface |
Use Scenario: Full-duplex RS-485 transceivers in remote I/O nodes connected via long cables susceptible to induced lightning surges. IC Role / Device Role / Timing Role: Paired SMAJ15CE3/TR13 devices on A/B lines referenced to ground, providing symmetrical common-mode and differential-mode clamping. Use Value: 5 ns bidirectional response captures fast EFT bursts; 15 V VWM allows operation with ±7 V RS-485 common-mode range while maintaining margin. |
Use Scenario: 48 V DC power entry point in cellular base station remote radio units installed on towers. IC Role / Device Role / Timing Role: First-line defense against secondary lightning surges per IEC61000-4-5 with 42 Ω source impedance, upstream of DC-DC isolation stage. Use Value: Qualifies for Class 3 (24 VWM max) and Class 4 (12 VWM max); 150 °C max operating temperature ensures reliability in sealed outdoor enclosures. |
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 SMAJ15CA | Identical VWM, VBR, VC, and PPP; same DO-214AC package but non-RoHS tin-lead plating. | Requires leaded reflow profile; not suitable for RoHS-compliant production lines. | Select SMAJ15CA only if legacy leaded assembly is mandated and matte-tin plating is unnecessary. |
| Vishay SMAJ15CAHE3_A/H | Same electrical specs and RoHS compliance; tighter VBR tolerance (±5% vs. ±10%) and lower typical leakage (0.5 µA vs. 1 µA). | Better suited for ultra-low-power battery-backed systems where sub-µA leakage is critical. | Choose SMAJ15CAHE3_A/H when tighter parametric control and lower leakage justify potential cost or lead-time trade-offs. |
Compared with SMAJ15CE3/TR13, Littelfuse SMAJ15CA lacks RoHS compliance and requires leaded soldering, while Vishay SMAJ15CAHE3_A/H offers tighter VBR tolerance and lower leakage - making it preferable for precision low-power designs despite identical clamping performance.
Availability
SMAJ15CE3/TR13 is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, RS-485 data line hardening, and outdoor telecom power interfaces requiring stable component supply across multi-year production cycles.
Supply support for SMAJ15CE3/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 ruggedized transient suppression in harsh environments - emphasizing high surge robustness, wide temperature operation, and qualification to MIL-PRF-19500 and avionics screening standards.
FAQ
What does the "C" suffix in SMAJ15CE3/TR13 indicate?
The "C" suffix denotes bidirectional construction - meaning SMAJ15CE3/TR13 provides symmetrical clamping for both positive and negative transients without polarity dependency. Unlike unidirectional variants (e.g., SMAJ15A), it has no cathode band marking and is used where AC-coupled signals or floating grounds require equal protection in both directions.
Is SMAJ15CE3/TR13 RoHS compliant and lead-free assembly compatible?
Yes, SMAJ15CE3/TR13 carries the "e3" suffix confirming RoHS compliance with annealed matte-tin plating. It meets JEDEC J-STD-020B Level 1 moisture sensitivity, eliminating dry-pack requirements and supporting standard lead-free reflow profiles up to 260 °C for 10 seconds - verified per Microsemi MSC0270A Rev L documentation.
What IEC standards does SMAJ15CE3/TR13 meet for surge immunity?
SMAJ15CE3/TR13 is specified for ESD immunity per IEC61000-4-2 (±8 kV contact, ±15 kV air), EFT immunity per IEC61000-4-4 (±2 kV power lines), and secondary lightning surge immunity per IEC61000-4-5 with 42 Ω source impedance (Class 3 up to 24 VWM, Class 4 up to 12 VWM). Its 26.9 V clamping voltage ensures protected circuits remain within safe operating limits.
How does the DO-214AC package of SMAJ15CE3/TR13 improve thermal performance?
The DO-214AC (SMA) package of SMAJ15CE3/TR13 uses wide C-bend leads and void-free epoxy molding to achieve 15 °C/W junction-to-lead thermal resistance. When mounted on FR4 with the recommended pad layout, this enables reliable dissipation of 500 W transient pulses and 5 W steady-state power at 75 °C lead temperature - critical for high-reliability industrial deployments.
Can SMAJ15CE3/TR13 replace unidirectional TVS diodes in existing designs?
SMAJ15CE3/TR13 can replace unidirectional variants only if the circuit topology supports bidirectional clamping - such as AC signal lines, differential buses, or floating power domains. It must not be substituted in unidirectional applications (e.g., DC power rail with explicit cathode-to-rail grounding) without verifying that reverse-polarity transients are expected and acceptable, as its symmetrical behavior alters grounding strategy and protection boundaries.
SMAJ15CE3/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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 26.9V
- Current - Peak Pulse (10/1000µs):
- 18.8A
- 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)
SMAJ15CE3/TR13 FAQ
1.How can I place an order for SMAJ15CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ15CE3/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 SMAJ15CE3/TR13 reliable?
The price and inventory of SMAJ15CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ15CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ15CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ15CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ15CE3/TR13?
SMAJ15CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ15CE3/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 SMAJ15CE3/TR13?
For technical support, including SMAJ15CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ15CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ15CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ15CE3/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 SMAJ15CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ15CE3/TR13?
All SMAJ15CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ15CE3/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 SMAJ15CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ15CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ15CE3/TR13 Tags
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onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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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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