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Vishay General Semiconductor - Diodes Division SMAJ24C-E3/61
- Part No.:
- SMAJ24C-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ24C-E3/61.pdf
- Description:
- TVS DIODE 24VWM 43VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,725
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Product details
Overview
SMAJ24C-E3/61 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for clamping ESD and surge transients on signal/power lines. It features 24 V stand-off voltage (VWM), 43.0 V maximum clamping voltage (VC) at 9.3 A peak pulse current (IPPM), 400 W peak pulse power (10/1000 µs), and operates from −55 °C to +150 °C - used in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMAJ24C-E3/61 datasheet, SMAJ24C-E3/61 pinout, SMAJ24C-E3/61 application, or SMAJ24C-E3/61 equivalent, this page delivers verified electrical specs, bi-directional terminal behavior, JEDEC-compliant thermal derating curves, RoHS-compliant soldering profile, and direct alternatives with clamping voltage and VWM trade-offs.
Technical Context
This bi-directional TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response to transients and low incremental surge resistance. Its symmetrical breakdown characteristic enables identical clamping in both polarities, with no polarity marking required on the SMA package.
Rated for 400 W peak pulse power (10/1000 µs waveform) up to 78 V, it derates to 300 W above that threshold. Thermal resistance is 120 °C/W (junction-to-ambient) on 5.0 × 5.0 mm copper pads, supporting reliable operation under repetitive surge conditions in automotive-grade environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse working voltage before leakage exceeds 1 µA; defines safe operating margin below clamping threshold. |
| VC @ IPPM | 43.0 V - Clamped voltage seen by protected circuit during 9.3 A 10/1000 µs surge; limits stress on downstream ICs. |
| IPPM | 9.3 A - Peak surge current capability under standard 10/1000 µs waveform; determines minimum line impedance for compliance. |
| PPPM | 400 W - Peak pulse power handling (≤78 V); supports robust protection against IEC 61000-4-5 Level 3 surges. |
| TJ Range | −55 °C to +150 °C - Full operational junction temperature range; validated for under-hood automotive and industrial control environments. |
| Package | DO-214AC (SMA) - Surface-mount package with 5.28 mm body length, compatible with automated placement and J-STD-020 MSL level 1 reflow. |
Pinout & Package
DO-214AC (SMA) package: bi-directional device with no polarity marking; terminals are symmetrical anode/cathode pair - cathode band omitted per bi-directional designation (C suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bi-directional transient clamp node | Both terminals function identically; connects across protected line and ground (or between differential lines) without orientation constraint. |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional clamping | Identical VBR (26.7–32.6 V) and VC (43.0 V) in both directions - eliminates polarity concerns in AC or floating signal paths. |
| Low clamping ratio | VC/VWM = 1.79 - tight voltage margin ensures protected ICs remain within absolute maximum ratings during surge events. |
| MSL Level 1 rating | Reflow-compatible up to 260 °C peak - supports single-pass lead-free assembly without moisture sensitivity delays. |
| RoHS & AEC-Q101 alignment | E3 suffix denotes commercial-grade RoHS compliance; HE3 variant available for AEC-Q101 qualified automotive use. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bi-directional voltage clamp placed between signal line and chassis ground to limit transient excursions. Use Value: Maintains signal integrity during 100 V/50 ms load dump events while holding clamped voltage ≤43.0 V - preventing damage to 5 V or 3.3 V interface ICs. |
Use Scenario: Safeguarding PLC digital input modules against induced surges from relay coil switching and motor drive noise. IC Role / Device Role / Timing Role: Parallel-connected transient suppressor across dry-contact inputs or optocoupler front-ends. Use Value: Absorbs 400 W surges without degradation, enabling >100,000 surge cycles per IEC 61000-4-5; reduces field failure rate in factory automation systems. |
| Telecom Line Interface | Consumer USB/Display Port ESD Guard |
Use Scenario: Shielding Ethernet PHY magnetics and RS-485 transceiver pins from lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: First-stage coarse clamp ahead of polymer PTC and precision TVS arrays. Use Value: Fast response (<1 ns) and low VC prevent latch-up in 3.3 V transceivers during 1 kV/0.5 µs EFT bursts. |
Use Scenario: Board-level ESD protection for HDMI, USB 2.0, or DisplayPort connectors exposed to human-body-model (HBM) discharges. IC Role / Device Role / Timing Role: Low-capacitance (≈200 pF at 0 V) bi-directional shunt element placed directly at connector pins. Use Value: Clamps ±15 kV HBM strikes to <43 V while adding <0.5 pF parasitic capacitance - preserving signal rise time and eye diagram integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24CA-E3/61 | Same VWM (24 V), identical VC (43.0 V), but CA suffix confirms bi-directional qualification per full family spec sheet; C and CA are functionally identical per Vishay doc 88390. | No functional difference; CA variant explicitly labeled for bi-directional use in ordering matrix - preferred when documentation traceability is required. | Select SMAJ24CA-E3/61 if internal procurement mandates explicit "CA" suffix for bi-directional verification; otherwise SMAJ24C-E3/61 is electrically identical. |
| SMBJ24C-E3/52 | Same VWM (24 V) and VC (43.0 V), but SMB package (DO-214AA) offers 600 W peak power - higher surge capacity due to larger thermal mass. | Used where higher IPPM (15.6 A) and 600 W rating are needed - e.g., primary-side AC input protection or high-energy industrial bus lines. | Choose SMBJ24C-E3/52 only when surge energy exceeds SMAJ24C-E3/61's 400 W limit; PCB layout must accommodate larger SMB footprint (5.28 mm × 4.57 mm vs. SMA's 4.50 mm × 2.79 mm). |
Compared with SMAJ24C-E3/61, SMAJ24CA-E3/61 provides identical protection with enhanced documentation clarity for bi-directional use, while SMBJ24C-E3/52 trades compact size for 50 % higher surge power - requiring board redesign but enabling longer service life in high-stress locations.
Availability
SMAJ24C-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O protection, telecom line interfaces, and consumer USB/display port ESD guard circuits requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMAJ24C-E3/61 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, thermal performance, and automotive qualification.
The SMAJ series targets cost-sensitive, high-volume transient protection applications across automotive, industrial, and telecom sectors - optimized for surface-mount manufacturability and consistent clamping performance under thermal stress.
FAQ
What is the clamping voltage of SMAJ24C-E3/61 under a 10/1000 µs surge?
The SMAJ24C-E3/61 clamps to a maximum of 43.0 V when subjected to its rated peak pulse current of 9.3 A using the standard 10/1000 µs waveform. This value is measured at TA = 25 °C on recommended 5.0 × 5.0 mm copper pads and remains stable across its full operating temperature range (−55 °C to +150 °C). The SMAJ24C-E3/61 achieves this with low incremental surge resistance, ensuring predictable protection behavior in real-world surge events.
Is SMAJ24C-E3/61 unidirectional or bidirectional?
SMAJ24C-E3/61 is a bi-directional transient voltage suppressor, as confirmed by the "C" suffix in its part number and explicit listing in the "DEVICES FOR BI-DIRECTION APPLICATIONS" section of Vishay document 88390. Electrical characteristics - including breakdown voltage (26.7–32.6 V) and clamping voltage (43.0 V) - apply identically in both directions, and the DO-214AC package carries no polarity marking. This makes the SMAJ24C-E3/61 suitable for AC-coupled lines, differential buses, and floating grounds where polarity cannot be guaranteed.
What is the maximum steady-state reverse voltage (VWM) for SMAJ24C-E3/61?
The maximum steady-state reverse stand-off voltage (VWM) for SMAJ24C-E3/61 is 24 V, meaning it will remain in high-impedance state with leakage current ≤1 µA up to this DC or RMS voltage. This parameter defines the upper limit of normal operating voltage across the device and ensures compatibility with 24 V industrial control systems and automotive subsystems. Exceeding 24 V risks premature conduction and accelerated wear - the SMAJ24C-E3/61 is not rated for continuous operation above this threshold.
Does SMAJ24C-E3/61 meet automotive qualification standards?
The base SMAJ24C-E3/61 is RoHS-compliant and rated for commercial temperature range (−55 °C to +150 °C), but it is not AEC-Q101 qualified. Vishay offers the SMAJ24CHE3/61 variant (HE3 suffix) for automotive-grade applications, which undergoes additional stress testing per AEC-Q101. For designs targeting under-hood or safety-critical automotive use, SMAJ24C-E3/61 must be validated per system-level requirements; the SMAJ24C-E3/61 itself carries no AEC-Q101 certification.
What is the thermal resistance (RθJA) of SMAJ24C-E3/61?
The typical junction-to-ambient thermal resistance (RθJA) of SMAJ24C-E3/61 is 120 °C/W when mounted on the recommended 0.2 × 0.2 inch (5.0 × 5.0 mm) copper pad per terminal, per Vishay document 88390. This value assumes still air conditions and defines the temperature rise above ambient per watt of sustained power dissipation. For pulsed operation (e.g., 10/1000 µs surges), transient thermal impedance curves (Figure 5) govern short-duration heating - the SMAJ24C-E3/61 leverages low RθJL (30 °C/W) to rapidly dissipate surge energy into PCB copper.
SMAJ24C-E3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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):
- 9.3A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ24C-E3/61 FAQ
1.How can I place an order for SMAJ24C-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ24C-E3/61 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 SMAJ24C-E3/61 reliable?
The price and inventory of SMAJ24C-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ24C-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ24C-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ24C-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ24C-E3/61?
SMAJ24C-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ24C-E3/61 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 SMAJ24C-E3/61?
For technical support, including SMAJ24C-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ24C-E3/61 requirements.
6.How does Aetrix verify that SMAJ24C-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ24C-E3/61 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 SMAJ24C-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ24C-E3/61?
All SMAJ24C-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ24C-E3/61, 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 SMAJ24C-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ24C-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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