My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ24CHE3/5A
- Part No.:
- SMAJ24CHE3/5A
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ24CHE3/5A.pdf
- Description:
- TVS DIODE 24VWM 43VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,259
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ24CHE3/5A from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for robust overvoltage protection of signal and power lines. It features a 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 AEC-Q101 qualification for automotive reliability.
For engineers reviewing the SMAJ24CHE3/5A datasheet, SMAJ24CHE3/5A pinout, SMAJ24CHE3/5A application, or SMAJ24CHE3/5A equivalent, key selection criteria include its bi-directional polarity, 1.0 µA max reverse leakage at 24 V, -55 °C to +150 °C operating junction temperature, and suitability for ESD/surge protection in automotive sensor interfaces and industrial I/O circuits.
Technical Context
This bi-directional TVS operates symmetrically in both polarities, with breakdown voltage (VBR) specified between 26.7 V and 32.6 V at 1.0 mA test current. Its clamping performance is characterized under standardized 10/1000 µs surge waveform, delivering 43.0 V clamping at 9.3 A, enabling effective protection of downstream ICs against transients induced by load switching or ESD events.
Thermally, it exhibits 120 °C/W junction-to-ambient thermal resistance (RθJA) on standard 0.2" × 0.2" copper pads and 30 °C/W junction-to-lead (RθJL). The device meets MSL Level 1 per J-STD-020, supports solder reflow up to 260 °C, and is RoHS-compliant with matte tin-plated leads compliant to J-STD-002 and JESD22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse working voltage before clamping begins |
| VC @ IPPM | 43.0 V - Clamped voltage during 9.3 A 10/1000 µs surge, limiting stress on protected circuitry |
| IPPM | 9.3 A - Peak surge current capability under standard 10/1000 µs waveform |
| PPPM | 400 W - Peak pulse power handling capacity, derated above 78 V to 300 W |
| ID @ VWM | 1.0 µA - Reverse leakage current at rated stand-off voltage, minimizing standby power loss |
| TJ Range | -55 °C to +150 °C - Operating junction temperature range supporting automotive under-hood and industrial environments |
| AEC-Q101 | Qualified - Meets stress test requirements for automotive-grade discrete semiconductors |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, low-profile plastic case with matte tin-plated leads; dimensions per Figure 5 (0.208" × 0.157" body, 0.078" lead width); meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (Bi-directional) | Reversible terminals | No polarity marking; symmetrical conduction in both directions - terminals interchangeable in PCB layout |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional suppression | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns |
| 400 W peak pulse power | Withstands high-energy transients common in automotive load-dump and industrial motor-switching events |
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces |
| Low 1.0 µA leakage at VWM | Minimizes quiescent current draw in battery-powered or always-on systems |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow without baking, simplifying SMT manufacturing |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor inputs (e.g., pressure, temperature) in engine bay modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role: Bi-directional TVS placed at connector interface to clamp fast-rising transients before they reach signal conditioning ICs or microcontrollers. Use Value: Maintains signal integrity under ±43.0 V clamping while surviving repeated 400 W surges, ensuring functional safety compliance. | Use Scenario: Shielding digital input/output channels on programmable logic controller (PLC) backplanes from field-wiring induced surges and ESD. IC Role / Device Role: Primary front-end transient suppressor on 24 V DC I/O lines, coordinated with upstream fusing and filtering. Use Value: Limits transient voltage to safe levels (<43.0 V) for 24 V-rated logic interfaces, preventing latch-up or permanent damage to FPGA or ASIC I/O cells. |
| Telecom Line Interface | Consumer Power Adapter Input |
Use Scenario: Safeguarding Ethernet PHY or RS-485 transceivers connected to unshielded outdoor cabling subject to lightning-induced surges. IC Role / Device Role: First-stage protection element on differential data lines, paired with common-mode chokes and secondary TVS arrays. Use Value: Symmetric clamping ensures balanced suppression across both conductors, preserving signal common-mode rejection ratio (CMRR). | Use Scenario: Input-stage surge protection for AC-DC adapters used in smart home hubs, where mains-borne transients couple into low-voltage DC outputs. IC Role / Device Role: Secondary-side TVS on regulated 5–24 V output rails to absorb residual spikes escaping primary-side MOVs and Y-capacitors. Use Value: Prevents brownouts or reset events in connected devices by holding output voltage within specification during 9.3 A transient events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24AHE3/5A | Uni-directional variant; cathode band marked; 38.9 V clamping at 10.3 A | Requires correct polarity placement; suited for DC-biased lines like power rails or unidirectional data buses | Select when protecting grounded-referenced circuits where reverse conduction must be blocked |
| SMBJ24CHE3/5A | Same VWM/VC specs but in larger DO-214AA (SMB) package; 600 W PPPM | Higher power handling and thermal mass; requires larger PCB footprint | Choose for higher surge immunity margin where space permits and duty cycle exceeds SMAJ limits |
Compared with SMAJ24CHE3/5A, SMAJ24AHE3/5A offers lower clamping voltage on DC lines but demands strict orientation, while SMBJ24CHE3/5A delivers 50 % more pulse power in a less compact form - making SMAJ24CHE3/5A optimal for space-constrained, bi-directional, automotive-qualified protection.
Availability
SMAJ24CHE3/5A is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, telecom line interfaces, and consumer power adapter designs requiring stable component supply and long-term lifecycle support.
Supply support for SMAJ24CHE3/5A 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 SMAJ series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness against ESD, lightning, and switching surges is mission-critical.
FAQ
What is the clamping voltage of SMAJ24CHE3/5A and how is it measured?
The SMAJ24CHE3/5A has a maximum clamping voltage (VC) of 43.0 V, measured at a peak pulse current (IPPM) of 9.3 A using the standardized 10/1000 µs double-exponential surge waveform. This value represents the upper limit of voltage seen by downstream components during worst-case transient events, ensuring reliable protection of 24 V nominal systems. The SMAJ24CHE3/5A achieves this clamping performance consistently across its qualified temperature range.
Is SMAJ24CHE3/5A suitable for automotive applications?
Yes, SMAJ24CHE3/5A is AEC-Q101 qualified and designated as a high-reliability/automotive grade part (indicated by the "HE3" suffix). It is specifically validated for use in automotive subsystems such as body control modules, sensor interfaces, and infotainment power supplies where resistance to thermal cycling, mechanical shock, and repetitive surge events is required. Its -55 °C to +150 °C operating range further supports under-hood deployment.
How does the bi-directional configuration of SMAJ24CHE3/5A affect PCB layout?
The SMAJ24CHE3/5A has no polarity marking and functions identically in either orientation, eliminating orientation constraints during automated placement. Unlike uni-directional variants (e.g., SMAJ24AHE3/5A), it requires no cathode band alignment - simplifying layout, reducing assembly errors, and enabling use on AC-coupled or floating differential lines such as RS-485 or Ethernet PHY interfaces.
What is the maximum reverse leakage current for SMAJ24CHE3/5A at its rated stand-off voltage?
The SMAJ24CHE3/5A exhibits a maximum reverse leakage current (ID) of 1.0 µA when biased at its rated stand-off voltage (VWM) of 24 V and tested at 25 °C. This ultra-low leakage minimizes power loss in always-on circuits and avoids false triggering in high-impedance sensing nodes - a critical advantage in battery-operated automotive sensors and precision industrial instrumentation where standby current budgets are tight.
Does SMAJ24CHE3/5A require special handling or packaging considerations?
No special handling is required: SMAJ24CHE3/5A is rated MSL Level 1 per J-STD-020, meaning it has unlimited floor life and withstands standard Pb-free reflow profiles up to 260 °C peak temperature. Its 13" tape-and-reel packaging (5A code) supports high-volume SMT assembly, and the matte tin-plated leads comply with J-STD-002 and JESD22-B102 solderability standards - ensuring robust joint formation without pre-baking or humidity control.
SMAJ24CHE3/5A 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ24CHE3/5A FAQ
1.How can I place an order for SMAJ24CHE3/5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ24CHE3/5A 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 SMAJ24CHE3/5A reliable?
The price and inventory of SMAJ24CHE3/5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ24CHE3/5A is usually 5 days.
3.What payment methods are accepted for SMAJ24CHE3/5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ24CHE3/5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ24CHE3/5A?
SMAJ24CHE3/5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ24CHE3/5A 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 SMAJ24CHE3/5A?
For technical support, including SMAJ24CHE3/5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ24CHE3/5A requirements.
6.How does Aetrix verify that SMAJ24CHE3/5A is sourced from the original manufacturer or authorized distributors?
All SMAJ24CHE3/5A 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 SMAJ24CHE3/5A meets industry standards.
7.What is the process for return or replacement of SMAJ24CHE3/5A?
All SMAJ24CHE3/5A units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ24CHE3/5A, 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 SMAJ24CHE3/5A part is unused and in its original packaging.
Return procedure for SMAJ24CHE3/5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ24CHE3/5A 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 …
