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Microchip Technology SMAJ24CAE3/TR13
- Part No.:
- SMAJ24CAE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ24CAE3/TR13.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,481
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Product details
Overview
SMAJ24CAE3/TR13 from Microsemi is a bidirectional surface-mount Transient Voltage Suppressor (TVS) in DO-214AC (SMA) package, rated for 500 W peak pulse power at 10/1000 µs, with 24 V standoff voltage (VWM), 26.7 V minimum breakdown voltage (VBR), and 43.0 V maximum clamping voltage (VC) at 11.6 A peak pulse current - deployed for IEC61000-4-5 secondary lightning protection in industrial power interfaces.
For engineers reviewing the SMAJ24CAE3/TR13 datasheet, SMAJ24CAE3/TR13 pinout, SMAJ24CAE3/TR13 application, or SMAJ24CAE3/TR13 equivalent, key selection criteria include bidirectional ESD/EFT immunity per IEC61000-4-2/4-4, RoHS-compliant matte-tin plating, 12 mm tape-and-reel packaging (TR13), and Class 3 secondary lightning rating with 42 Ω source impedance.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering sub-5 ns clamping response to fast transients while maintaining <1 μA standby leakage at 24 V. Its thermally robust DO-214AC package enables 15 °C/W junction-to-lead thermal resistance when soldered to FR4 with recommended footprint.
Designed for line-level surge suppression, it supports repetitive impulse duty factor ≤0.01% and withstands 260 °C soldering for 10 s. The device meets IEC61000-4-5 Class 3 (42 Ω source) and Class 2 (12 Ω source) requirements, with clamping performance validated at TA = 25 °C and derated above 25 °C per published curve.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin for 24 V DC bus protection. |
| VBR min @ IBR | 26.7 V @ 1 mA - Minimum voltage at which device enters avalanche breakdown; ensures reliable triggering above system nominal voltage. |
| VC @ IPP | 43.0 V @ 11.6 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to safe levels under worst-case transient. |
| PPP | 500 W - Peak pulse power handling capability; sustains single 10/1000 µs surges up to 11.6 A without degradation. |
| ID @ VWM | <1 μA - Reverse leakage current at 24 V; negligible power loss and signal integrity impact in standby state. |
| TJ Range | –65 °C to +150 °C - Operating and storage temperature range; suitable for automotive under-hood and industrial control environments. |
| Package | DO-214AC (SMA) - Standard surface-mount outline with C-bend leads; compatible with automated pick-and-place and reflow processes. |
Pinout & Package
DO-214AC (SMA) package with two terminals: symmetrical bidirectional construction has no polarity marking; both terminals function identically as transient shunt paths to ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient shunt path | Either terminal conducts during overvoltage events in either polarity; no cathode band marking required for bidirectional devices. |
| Case / Body | Thermal and mechanical interface | Void-free UL94V-0 epoxy body provides electrical isolation and aids heat dissipation via PCB copper pour under pad. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional architecture | Enables symmetrical surge suppression on AC lines or ungrounded DC buses without polarity constraints. |
| RoHS-compliant "e3" finish | Matte-tin plating meets JEDEC J-STD-020B Level 1 moisture sensitivity; eliminates dry-pack requirement and supports lead-free reflow. |
| IEC61000-4-5 Class 3 compliance | Validated for 42 Ω source impedance lightning surges up to 1 kV open-circuit; protects against secondary effects in industrial fieldbus nodes. |
| Fast clamping response | <5 ns theoretical response time ensures suppression of ESD (IEC61000-4-2) and EFT (IEC61000-4-4) transients before sensitive circuitry latches or fails. |
| Tape-and-reel packaging (TR13) | 2500 units per 13-inch reel per EIA-481-1-A standard; optimized for high-volume SMT assembly with 12 mm carrier tape width. |
Applications
| Industrial Power Input Protection | RS-485/422 Data Line Protection |
|---|---|
Use Scenario: 24 V DC power input stage of programmable logic controller (PLC) module exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS shunts surge energy to chassis ground before it reaches upstream DC-DC converter and microcontroller power rails. Use Value: Limits transient voltage to ≤43.0 V during 11.6 A surges, preventing latch-up or gate oxide damage in 24 V-rated power management ICs. |
Use Scenario: Full-duplex RS-485 transceiver bus lines in factory automation network subject to cable-induced EFT bursts. IC Role / Device Role / Timing Role: Placed differential-line-to-ground to clamp common-mode transients while preserving signal integrity below 20 Mbps. Use Value: Sub-5 ns response ensures clamping occurs within first 10 ns of EFT edge, meeting IEC61000-4-4 level 4 immunity without data corruption. |
| Automotive Body Control Module (BCM) | Smart Sensor Interface Protection |
Use Scenario: LIN bus or switched 12 V supply line in BCM exposed to battery disconnect transients and ISO 7637-2 pulse 1/2a. IC Role / Device Role / Timing Role: Bidirectional shunt between power rail and ground to absorb negative-going spikes and positive load dumps. Use Value: Withstands –65 °C to +150 °C ambient and maintains <1 μA leakage at 24 V, enabling reliable operation in under-hood environments. |
Use Scenario: Analog output line (e.g., 4–20 mA loop) of pressure sensor in oil & gas monitoring system subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Connected line-to-ground to limit fault voltage during IEC61000-4-5 Class 3 events (1 kV, 42 Ω source). Use Value: 43.0 V clamping voltage ensures downstream op-amp and ADC inputs remain within absolute maximum ratings during surge recovery. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24CA | No "e3" RoHS suffix; uses SnPb plating instead of matte-tin; identical electrical specs and DO-214AC package. | Not compliant with RoHS Directive 2011/65/EU; unsuitable for new EU-market designs requiring lead-free assembly. | Select SMAJ24CA only for legacy repair or non-RoHS production where SnPb reflow is mandated. |
| SMBJ24CAE3 | Same VWM, VBR, VC, but 600 W PPP rating and DO-214AA (SMB) package; 20% larger footprint and higher thermal mass. | Higher surge margin suits harsher environments (e.g., outdoor telecom); requires PCB layout change due to larger body and pad spacing. | Choose SMBJ24CAE3 when system-level testing demands >500 W headroom or extended thermal cycling endurance beyond SMAJ rating. |
Compared with SMAJ24CA and SMBJ24CAE3, SMAJ24CAE3/TR13 delivers RoHS-compliant 500 W surge protection in the smallest standardized surface-mount TVS footprint (DO-214AC), balancing cost, board space, and regulatory compliance for high-volume industrial controls.
Availability
SMAJ24CAE3/TR13 is available at Aetrix Electronics and suitable for industrial power input protection, RS-485/422 data line hardening, and automotive body control module (BCM) surge suppression requiring stable component supply and full traceability.
Supply support for SMAJ24CAE3/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 to deliver rugged, surface-mount transient suppression for mission-critical 24 V and 48 V systems where failure tolerance and long-term stability are mandatory.
FAQ
What does the "CA" suffix indicate in SMAJ24CAE3/TR13?
The "CA" suffix denotes a bidirectional configuration - meaning SMAJ24CAE3/TR13 suppresses transients of either polarity symmetrically, unlike unidirectional "A" variants that conduct only in reverse bias. This makes SMAJ24CAE3/TR13 ideal for AC-coupled or floating DC lines where voltage polarity reversal may occur during faults.
Is SMAJ24CAE3/TR13 compliant with IEC61000-4-5, and what class does it support?
Yes, SMAJ24CAE3/TR13 is certified for IEC61000-4-5 secondary lightning protection: Class 3 with 42 Ω source impedance (1 kV test level) and Class 2 with 12 Ω source impedance. Its 43.0 V clamping voltage at 11.6 A ensures downstream circuitry remains within safe operating limits during standardized surge waveforms.
What is the meaning of "TR13" in the full part number SMAJ24CAE3/TR13?
"TR13" specifies tape-and-reel packaging: 2500 units per 13-inch reel conforming to EIA-481-1-A standard, using 12 mm carrier tape width. This format enables automated SMT placement and is distinct from the "TR"-only variant (750 units per 7-inch reel), ensuring scalability for medium-to-high volume production of SMAJ24CAE3/TR13.
How does the "e3" suffix affect the construction and reliability of SMAJ24CAE3/TR13?
The "e3" suffix indicates RoHS-compliant matte-tin plating per JEDEC J-STD-020B Level 1 moisture sensitivity - eliminating dry-pack requirements and supporting lead-free reflow profiles up to 260 °C for 10 s. SMAJ24CAE3/TR13 retains identical electrical performance and thermal characteristics as non-e3 variants while meeting global environmental regulations.
Can SMAJ24CAE3/TR13 be used in place of a unidirectional TVS like SMAJ24A?
No - SMAJ24CAE3/TR13 is bidirectional and lacks polarity marking, whereas SMAJ24A is unidirectional with cathode band and forward conduction capability. Substituting SMAJ24CAE3/TR13 for SMAJ24A in DC circuits with defined ground reference may compromise clamping behavior and violate design intent; always verify circuit topology and transient directionality before replacement.
SMAJ24CAE3/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):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 12.8A
- 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)
SMAJ24CAE3/TR13 FAQ
1.How can I place an order for SMAJ24CAE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ24CAE3/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 SMAJ24CAE3/TR13 reliable?
The price and inventory of SMAJ24CAE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ24CAE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ24CAE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ24CAE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ24CAE3/TR13?
SMAJ24CAE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ24CAE3/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 SMAJ24CAE3/TR13?
For technical support, including SMAJ24CAE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ24CAE3/TR13 requirements.
6.How does Aetrix verify that SMAJ24CAE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ24CAE3/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 SMAJ24CAE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ24CAE3/TR13?
All SMAJ24CAE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ24CAE3/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 SMAJ24CAE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ24CAE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ24CAE3/TR13 Tags
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ESD9B5.0ST5G
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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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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