My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ24CA-E3/52
;;2.jpg)
- Part No.:
- SMBJ24CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24CA-E3/52.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,493
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ24CA-E3/52 from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection on signal and power lines. It features a 24 V stand-off voltage (VWM), 38.9 V maximum clamping voltage (VC) at 15.4 A peak pulse current, and 600 W peak pulse power capability with a 10/1000 µs waveform - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ24CA-E3/52 datasheet, SMBJ24CA-E3/52 pinout, SMBJ24CA-E3/52 application, or SMBJ24CA-E3/52 equivalent, key selection criteria include bidirectional clamping symmetry, low thermal resistance (RθJL = 20 °C/W), UL 497B recognition, AEC-Q101 qualification eligibility, and compatibility with automated SMT placement on SMB (DO-214AA) footprint.
Technical Context
This TVS operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (<1 µA leakage at 24 V), then rapidly avalanches to clamp transients above its 26.7–29.5 V breakdown range (VBR at 1 mA). Its bidirectional structure enables symmetric suppression of positive and negative surges without polarity dependency.
It delivers fast response (<1 ps) and low incremental surge resistance, enabling effective suppression of ESD (IEC 61000-4-2), EFT (IEC 61000-4-4), and lightning-induced surges (IEC 61000-4-5). The device is rated for operation from –55 °C to +150 °C and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 26.7 V / 29.5 V at 1 mA - Confirmed breakdown threshold range ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | 38.9 V at 15.4 A - Clamping voltage limits downstream IC stress during 600 W transient; critical for protecting 3.3 V/5 V logic interfaces. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform supports industrial-grade surge immunity requirements. |
| RθJL | 20 °C/W - Low junction-to-lead thermal resistance enables efficient heat dissipation into PCB copper pads without heatsink. |
| TJ max. | +150 °C - Extended junction temperature rating supports use in under-hood automotive and high-ambient industrial environments. |
| UL Recognition | UL 497B (QVGQ2), File E136766 - Certified for telecom and data line protection applications requiring safety agency approval. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); matte tin-plated leads, solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative surge) | Provides low-impedance path to ground for negative-going transients; symmetrical with cathode in bidirectional operation. |
| Cathode | Transient current entry (positive surge) | Provides low-impedance path to ground for positive-going transients; functionally identical to anode due to bidirectional design. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM performance for ± surges - eliminates need for polarity-aware layout or external series components. |
| 600 W peak pulse power | Withstands 10/1000 µs surges up to 15.4 A - meets IEC 61000-4-5 Level 4 (4 kV) when properly mounted on 5.0 mm × 5.0 mm copper pads. |
| Low clamping ratio (VC/VBR) | 1.46 (38.9 V / 26.7 V) - minimizes overvoltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected ICs. |
| MSL Level 1, 260 °C peak | Compatible with standard lead-free reflow profiles - supports high-yield automated assembly without moisture sensitivity concerns. |
| AEC-Q101 qualification option | Available with HE3/HM3 suffix - enables drop-in use in automotive ECUs where reliability validation is mandatory. |
Applications
| Industrial Sensor Interface | Telecom Data Line Protection |
|---|---|
Use Scenario: Protecting RS-485 transceivers and analog sensor outputs (e.g., 4–20 mA loops) from induced switching transients in factory automation cabinets. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed across differential pair or supply rail to divert surge energy away from sensitive input stages. Use Value: Limits clamped voltage to ≤38.9 V, ensuring transceiver survival during 1 kV/µs fast transients while maintaining signal integrity below 24 V operating range. |
Use Scenario: Safeguarding Ethernet PHYs, DSL line drivers, and POTS interface ICs against lightning-induced surges on outdoor-facing ports. IC Role / Device Role / Timing Role: Primary-level surge arrestor in hybrid protection circuits, coordinated with GDTs or polymer PTCs for multi-stage defense. Use Value: UL 497B recognition and bidirectional symmetry enable compliance with GR-1089-CORE telecom safety standards without polarity alignment overhead. |
| Automotive Body Control Module | Consumer Power Adapter Input |
Use Scenario: Suppressing load-dump and jump-start transients on 12 V supply rails feeding microcontrollers and CAN transceivers in BCMs. IC Role / Device Role / Timing Role: Secondary clamping device downstream of primary TVS or fuse, providing fast-response backup protection within tight board space. Use Value: +150 °C rating and AEC-Q101-qualified variants (HE3) support under-dash deployment where ambient exceeds 105 °C. |
Use Scenario: Protecting AC-DC adapter secondary-side outputs (e.g., 5 V/12 V USB-PD rails) from ESD and capacitor discharge events during plug insertion. IC Role / Device Role / Timing Role: Final-stage overvoltage guard before USB connectors or downstream DC-DC regulators. Use Value: 1 µA max leakage at 24 V ensures negligible standby current drain; RoHS-compliant E3 suffix meets global regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC24CA | Same VWM (24 V) and bidirectional design, but lower PPPM (400 W) and higher VC (43.5 V at 10.3 A). | Limited to lower-energy surge environments (e.g., consumer USB ports); not suitable for IEC 61000-4-5 Level 4. | Select SAC24CA only when board space constraints prevent SMB footprint or when 400 W rating suffices. |
| SMBJ24A-E3/52 | Unidirectional variant with identical VWM, VBR, and package, but asymmetric clamping (cathode-anode conduction only). | Requires correct polarity orientation; unsuitable for AC-coupled or floating differential lines without additional circuitry. | Choose SMBJ24A-E3/52 only for DC-biased single-ended rails where polarity is fixed and reverse surge risk is negligible. |
Compared with SAC24CA and SMBJ24A-E3/52, SMBJ24CA-E3/52 provides balanced bidirectional clamping, highest surge power headroom (600 W), and lowest clamping voltage - making it optimal for industrial and telecom interfaces where polarity-agnostic, high-energy transient immunity is required.
Availability
SMBJ24CA-E3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom data line protection, automotive body control modules, and consumer power adapter inputs requiring stable component supply and long-term lifecycle continuity.
Supply support for SMBJ24CA-E3/52 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, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-reliability transient suppression in harsh environments - targeting industrial automation, automotive electronics, and communications infrastructure where robustness and safety certification are mandatory.
FAQ
What is the clamping voltage of SMBJ24CA-E3/52 at its rated peak pulse current?
The SMBJ24CA-E3/52 has a maximum clamping voltage (VC) of 38.9 V at 15.4 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. Designers must verify that downstream components tolerate this clamped level under worst-case transient conditions. The SMBJ24CA-E3/52 achieves this performance while maintaining low thermal resistance and bidirectional symmetry.
Is SMBJ24CA-E3/52 suitable for automotive applications?
SMBJ24CA-E3/52 itself is commercial-grade (E3 suffix), but Vishay offers AEC-Q101-qualified versions under the HE3 and HM3 suffixes (e.g., SMBJ24CAHE3_B). These qualified variants undergo extended stress testing for temperature cycling, humidity, and mechanical shock - meeting automotive electronics reliability requirements. For non-automotive designs, the SMBJ24CA-E3/52 remains fully compatible with under-hood ambient temperatures up to +150 °C due to its rated TJ max.
How does the bidirectional design of SMBJ24CA-E3/52 affect PCB layout?
The SMBJ24CA-E3/52 has no polarity marking and identical electrical behavior in both directions, eliminating orientation constraints during placement. This simplifies layout by removing the need for cathode band alignment, reduces assembly errors, and enables use on AC-coupled or floating differential lines (e.g., RS-485, CAN FD) without external diodes or bridge configurations. Its SMB (DO-214AA) footprint remains unchanged versus unidirectional variants, allowing shared land patterns in mixed-design boards.
What is the maximum reverse leakage current for SMBJ24CA-E3/52 at its stand-off voltage?
At its 24 V stand-off voltage (VWM) and 25 °C ambient temperature, the SMBJ24CA-E3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA. This ultra-low leakage ensures minimal power loss in always-on systems and prevents false triggering in high-impedance sensing nodes. Leakage remains well below 5 µA even at elevated temperatures up to +85 °C, supporting stable operation in battery-powered and energy-sensitive applications using the SMBJ24CA-E3/52.
Does SMBJ24CA-E3/52 meet any safety agency certifications?
Yes - the SMBJ24CA-E3/52 carries Underwriters Laboratories (UL) recognition under standard UL 497B for protectors, with file number E136766. This certification validates its suitability for telecom and data line protection in safety-critical installations. It also complies with RoHS Directive 2011/65/EU (E3 suffix) and meets JESD201 Class 2 whisker resistance. These credentials support global market access and simplify regulatory documentation for end equipment incorporating the SMBJ24CA-E3/52.
SMBJ24CA-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- 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):
- 15.4A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SMBJ24CA-E3/52 FAQ
1.How can I place an order for SMBJ24CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24CA-E3/52 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 SMBJ24CA-E3/52 reliable?
The price and inventory of SMBJ24CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ24CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ24CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24CA-E3/52?
SMBJ24CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24CA-E3/52 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 SMBJ24CA-E3/52?
For technical support, including SMBJ24CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24CA-E3/52 requirements.
6.How does Aetrix verify that SMBJ24CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ24CA-E3/52 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 SMBJ24CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ24CA-E3/52?
All SMBJ24CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24CA-E3/52, 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 SMBJ24CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ24CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24CA-E3/52 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
