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Microchip Technology SMAJ24CE3/TR13
- Part No.:
- SMAJ24CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ24CE3/TR13.pdf
- Description:
- TVS DIODE 24VWM 43VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,947
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Product details
Overview
SMAJ24CE3/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 24 V reverse standoff voltage (VWM), 43.0 V maximum clamping voltage (VC) at 11.6 A peak pulse current (IPP), and 500 W peak pulse power rating per 10/1000 µs waveform - deployed in industrial power supplies, automotive body electronics, and telecom interface circuits.
For engineers reviewing the SMAJ24CE3/TR13 datasheet, SMAJ24CE3/TR13 pinout, SMAJ24CE3/TR13 application, or SMAJ24CE3/TR13 equivalent, key selection criteria include bidirectional clamping behavior, IEC61000-4-2/4-4/4-5 compliance class mapping (Class 3 @ 42 Ω, Class 2 @ 12 Ω), RoHS-compliant matte-tin plating, and DO-214AC package thermal performance (15 °C/W junction-to-lead).
Technical Context
The SMAJ24CE3/TR13 operates as a symmetrical avalanche diode pair in anti-parallel configuration, enabling identical clamping in both polarities without polarity marking. Its <100 ps theoretical response time (unidirectional reference) and <5 ns measured response for bidirectional operation ensure effective suppression of fast transients including contact ESD (±8 kV) and burst noise.
It is rated for continuous operation from –65 °C to +150 °C, with thermal resistance of 15 °C/W junction-to-lead and 80 °C/W junction-to-ambient on FR4 (1 oz Cu). Standby leakage remains ≤1 µA at 24 VWM, supporting low-power system monitoring integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin. |
| VBR min | 26.7 V @ 1 mA - Minimum breakdown threshold; ensures reliable triggering above nominal rail. |
| VC @ IPP | 43.0 V @ 11.6 A - Clamped voltage during 10/1000 µs surge; determines protected IC's voltage stress limit. |
| PPP | 500 W - Peak pulse power handling; supports high-energy surges without failure under defined waveform. |
| IPP | 11.6 A - Peak current at VC; used with source impedance to verify IEC61000-4-5 test level compatibility. |
| ID @ VWM | ≤1 µA - Reverse leakage at standoff; negligible loading on 24 V sensor or control circuits. |
| Package | DO-214AC (SMA) - Standardized 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) | Transient current path | Both terminals function identically; no polarity dependency - enables placement flexibility on PCB without orientation check. |
| Case (body) | Thermal conduction path | Non-electrical; serves as heatsink interface via soldered pad area - requires minimum 25 mm² copper pour per JEDEC MO-213. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating lines (e.g., RS-485, CAN bus, sensor bridges) without polarity concerns. |
| IEC61000-4-5 Class 3 support | Validated for secondary lightning immunity up to 1 kV open-circuit voltage with 42 Ω source impedance - meets industrial fieldbus requirements. |
| RoHS-compliant "e3" finish | Matte-tin plating meets 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 | Handles repetitive surge events in motor drive feedback paths or solenoid driver outputs without parameter drift or degradation. |
Applications
| Industrial Power Input Protection | Automotive Body Control Module |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive switching. IC Role / Device Role / Timing Role: Primary surge clamp limiting transient voltage seen by upstream DC-DC converter and downstream microcontroller. Use Value: Limits clamped voltage to 43.0 V - below absolute maximum rating of common 36 V-input buck controllers and prevents latch-up in 24 V IO buffers. | Use Scenario: LIN bus line protection in door module where ESD from human contact couples into wiring harness. IC Role / Device Role / Timing Role: Bidirectional TVS placed across LIN differential pair to shunt ±8 kV contact ESD per IEC61000-4-2. Use Value: Sub-5 ns response ensures clamping occurs before LIN transceiver input stages experience overstress - preserves communication integrity during factory handling. |
| Telecom Interface Protection | Medical Sensor Signal Conditioning |
Use Scenario: RS-485 transceiver port on networked patient monitor connected to wall-powered base station. IC Role / Device Role / Timing Role: Common-mode surge suppressor on A/B lines referenced to chassis ground. Use Value: 43.0 V clamping maintains RS-485 receiver common-mode range (–7 V to +12 V) while absorbing 1 kV IEC61000-4-5 surges - avoids false triggering or data corruption. | Use Scenario: Bridge amplifier output driving strain-gauge-based vital sign sensor in portable diagnostic device. IC Role / Device Role / Timing Role: Low-leakage bidirectional clamp protecting precision op-amp inputs from ESD during cable insertion. Use Value: ≤1 µA standby current prevents offset drift in nV-level instrumentation amplifiers; symmetrical clamping avoids signal inversion artifacts. |
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 | Same electrical specs and DO-214AC package; lacks "e3" RoHS suffix and TR13 tape-and-reel packaging. | No RoHS compliance or standardized reel quantity - unsuitable for automated SMT lines requiring lead-free process control. | Select SMAJ24CA only for legacy non-RoHS builds or hand-soldered prototypes. |
| SMBJ24CA | Lower 400 W peak power rating; identical VWM, VBR, and VC, but 10.2 A IPP - due to SMB (DO-214AA) package's higher thermal resistance. | Reduced surge margin in high-duty-cycle environments (e.g., motor drive feedback); acceptable for low-frequency ESD-only use cases. | Choose SMBJ24CA when board space is constrained and surge energy is limited to <400 W. |
Compared with SMAJ24CA and SMBJ24CA, the SMAJ24CE3/TR13 uniquely combines full RoHS compliance, industry-standard 750-unit tape-and-reel delivery, and 500 W surge capacity in the DO-214AC footprint - making it optimal for volume production of certified industrial and medical devices.
Availability
SMAJ24CE3/TR13 is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, telecom interface protection, and medical sensor signal conditioning requiring stable component supply across multi-year production cycles.
Supply support for SMAJ24CE3/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 high-power, surface-mount transient suppression in compact packages for harsh-environment electronics - emphasizing thermal robustness, IEC compliance, and long-term parametric stability.
FAQ
What does the "C" suffix in SMAJ24CE3/TR13 indicate?
The "C" suffix denotes bidirectional construction: SMAJ24CE3/TR13 contains two anti-parallel avalanche diodes, enabling symmetrical clamping for AC or floating signals. Unlike unidirectional variants (e.g., SMAJ24A), it has no cathode band marking and supports protection on lines without defined polarity - critical for RS-485, CAN, or bridge sensor interfaces.
Is SMAJ24CE3/TR13 compliant with IEC61000-4-5 for lightning surge testing?
Yes, SMAJ24CE3/TR13 is validated for IEC61000-4-5 secondary lightning protection: it meets Class 3 (1 kV open-circuit, 42 Ω source) and Class 2 (1 kV, 12 Ω source). Its 43.0 V clamping voltage at 11.6 A ensures protected circuitry remains within safe operating limits during standardized surge waveforms - confirmed in Microsemi's MSC0270A datasheet.
What is the thermal resistance of SMAJ24CE3/TR13, and how does it affect layout?
SMAJ24CE3/TR13 has a junction-to-lead thermal resistance of 15 °C/W and junction-to-ambient of 80 °C/W on FR4 with recommended footprint. This requires ≥25 mm² copper pour connected to both terminals for sustained surge duty; inadequate copper increases junction temperature, degrading clamping consistency and lifetime - especially in repeated 10/1000 µs events.
Does SMAJ24CE3/TR13 require special handling for moisture sensitivity?
No - SMAJ24CE3/TR13 is rated IPC/JEDEC J-STD-020B Level 1 (unlimited floor life), meaning no dry-pack or baking is required prior to reflow. Its RoHS-compliant matte-tin plating and void-free epoxy body enable standard lead-free reflow profiles up to 260 °C for 10 seconds, simplifying manufacturing for high-volume SMT lines.
How does the "TR13" suffix impact ordering and assembly of SMAJ24CE3/TR13?
The "TR13" suffix specifies EIA-481-1-A tape-and-reel packaging: 2500 units per 13-inch reel with 12 mm carrier tape. This format enables direct feeding into high-speed pick-and-place machines, reduces manual handling errors, and supports traceability via reel labeling - essential for automotive and medical production where lot control and defect tracking are mandatory.
SMAJ24CE3/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:
- 43V
- Current - Peak Pulse (10/1000µs):
- 11.6A
- 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)
SMAJ24CE3/TR13 FAQ
1.How can I place an order for SMAJ24CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ24CE3/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 SMAJ24CE3/TR13 reliable?
The price and inventory of SMAJ24CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ24CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ24CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ24CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ24CE3/TR13?
SMAJ24CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ24CE3/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 SMAJ24CE3/TR13?
For technical support, including SMAJ24CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ24CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ24CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ24CE3/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 SMAJ24CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ24CE3/TR13?
All SMAJ24CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ24CE3/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 SMAJ24CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ24CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ24CE3/TR13 Tags
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