My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ24CA-E3/61
- Part No.:
- SMAJ24CA-E3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ24CA-E3/61.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:25,474
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ24CA-E3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection on signal and power lines. It features a 24 V standoff voltage (VWM), 38.9 V maximum clamping voltage (VC) at 10.3 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed in automotive sensor interfaces, industrial I/O modules, and telecom line protection.
For engineers reviewing the SMAJ24CA-E3/61 datasheet, SMAJ24CA-E3/61 pinout, SMAJ24CA-E3/61 application, or SMAJ24CA-E3/61 equivalent, this device delivers verified bidirectional clamping performance, AEC-Q101 qualification readiness (via HE3 suffix variants), RoHS-compliant SMA (DO-214AC) packaging, and precise 24 V stand-off tolerance critical for 24 V rail protection in harsh environments.
Technical Context
This TVS operates symmetrically in both directions due to its bidirectional construction, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 μA at VWM), while the low incremental surge resistance supports rapid energy dissipation during ESD or lightning-induced surges.
The device is rated for 150 °C maximum junction temperature and exhibits a VBR range of 26.7–29.5 V at 1.0 mA test current, with a temperature coefficient of 0.096 %/°C - ensuring predictable clamping shift across automotive and industrial thermal ranges. Mounting on 5.0 mm × 5.0 mm copper pads sustains its 400 W pulse rating up to TA = 25 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; matches standard 24 V industrial control rails. |
| VBR (min/max) | 26.7 V / 29.5 V at 1.0 mA - Confirmed breakdown threshold ensures reliable turn-on margin above VWM. |
| VC @ IPPM | 38.9 V at 10.3 A - Clamping voltage under 10/1000 μs surge defines worst-case overvoltage seen by protected ICs. |
| PPPM | 400 W - Peak pulse power handling capability with 0.01 % duty cycle; sufficient for ISO 7637-2 Pulse 1/2a/5a events. |
| IPPM | 10.3 A - Peak surge current capacity derived from VC and PPPM; validates protection level for common automotive transients. |
| Junction Temp Range | −55 °C to +150 °C - Enables deployment in under-hood automotive, factory-floor PLCs, and outdoor telecom enclosures. |
| Package | SMA (DO-214AC) - Surface-mount package with 5.28 mm × 4.50 mm footprint, compatible with automated SMT assembly and IPC Class 2 whisker-resistant plating. |
Pinout & Package
Package: SMA (DO-214AC), bidirectional configuration - no polarity marking; symmetrical two-terminal construction with cathode/anode terminals functionally interchangeable under reverse/forward surge conditions.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge current entry (negative transient) | Accepts negative-going transients; forms one side of bidirectional clamping path into junction. |
| Cathode | Surge current entry (positive transient) | Accepts positive-going transients; completes symmetrical clamping path with anode terminal. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating lines without external polarity management. |
| 400 W peak pulse power (10/1000 μs) | Withstands repetitive load dump and inductive switching surges in 24 V systems per ISO 16750-2. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on downstream MOSFETs or RS-485 transceivers during fast transients. |
| MSL Level 1, 260 °C reflow compatible | Supports lead-free PCB assembly without moisture-related popcorning or delamination risk. |
| AEC-Q101 qualification path | HE3/HM3 variants available - meets stress test requirements for automotive electronics reliability validation. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN/LIN bus nodes and analog sensor inputs (e.g., pressure, temperature) from load dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed at connector interface to clamp ±100 V transients before they reach signal conditioning amplifiers or microcontroller GPIOs. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (110 V/2 Ω) with VC ≤ 38.9 V, preventing latch-up or permanent damage to 3.3 V/5 V logic. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers against field-wiring faults and relay coil flyback. IC Role / Device Role / Timing Role: Standoff-rated TVS installed between input terminal and optocoupler input, shunting surge energy directly to ground. Use Value: Withstands 400 W pulses without degradation, enabling >100,000 surge cycles in factory automation environments per IEC 61000-4-5. |
| Telecom Line Interface | Consumer Power Adapter ESD Guard |
|
Use Scenario: Shielding Ethernet PHY power pins and auxiliary bias rails in PoE-powered network switches from lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level TVS on 24 V auxiliary supply, coordinated with primary GDT or MOV to limit let-through voltage. Use Value: 38.9 V clamping ensures protected DC-DC controller remains below absolute maximum ratings during 1 kV/0.5 Ω combination wave testing. |
Use Scenario: Adding cost-effective surge immunity to USB-C PD adapter secondary-side 24 V output rails before buck converter input. IC Role / Device Role / Timing Role: Fast-response TVS placed across output capacitor to absorb ESD and capacitive discharge spikes during hot-plug events. Use Value: Sub-1 ns response time and <1.0 μA leakage at 24 V prevent standby power loss while meeting IEC 61000-4-2 Level 4 (15 kV air). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ24A-E3/61 | Unidirectional variant; same VWM, VBR, VC, and PPPM, but requires correct polarity placement. | Only suitable where circuit topology guarantees unidirectional surge direction (e.g., DC power input with known ground reference). | Select when protecting grounded 24 V supplies with fixed polarity - avoids need for dual-diode arrangements. |
| SMBJ24CA-E3/52 | Same VWM and bidirectional function, but SMB (DO-214AA) package: 5.28 mm × 4.57 mm vs. SMA's 5.28 mm × 4.50 mm; 600 W PPPM rating. | Higher power handling enables use in higher-energy surge environments (e.g., outdoor base stations), but requires larger PCB pad area. | Choose when system-level surge testing exceeds 400 W requirements or when legacy SMB layout exists. |
Compared with SMAJ24CA-E3/61, the unidirectional SMAJ24A-E3/61 reduces design flexibility in floating or AC-coupled paths, while the SMBJ24CA-E3/52 trades compactness for enhanced surge margin - making SMAJ24CA-E3/61 optimal for space-constrained 24 V industrial and automotive PCBs requiring balanced performance and footprint.
Availability
SMAJ24CA-E3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter designs requiring stable component supply, consistent RoHS compliance, and traceable lot-level documentation.
Supply support for SMAJ24CA-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, TVS devices, and optoelectronics with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMAJ series was engineered specifically for high-reliability transient suppression in 12 V–188 V DC systems, targeting automotive, industrial, and telecom applications where compact size, fast response, and repeatable clamping are mandatory.
FAQ
What is the clamping voltage of SMAJ24CA-E3/61 under a 10/1000 μs surge?
The SMAJ24CA-E3/61 has a maximum clamping voltage (VC) of 38.9 V at 10.3 A peak pulse current (IPPM) with a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 and defines the upper voltage limit imposed on protected circuitry during standardized surge events - critical for ensuring downstream 3.3 V or 5 V ICs remain within safe operating limits. The SMAJ24CA-E3/61 achieves this with minimal overshoot due to its low incremental resistance.
Is SMAJ24CA-E3/61 RoHS-compliant and halogen-free?
Yes, SMAJ24CA-E3/61 carries the "E3" suffix, indicating it is RoHS-compliant and manufactured to commercial-grade specifications per Vishay's material categorization standards. It is not halogen-free; for halogen-free compliance, the "M3" suffix variant (e.g., SMAJ24CA-M3/61) must be selected. Both E3 and M3 meet JESD 201 Class 2 whisker resistance and J-STD-020 MSL Level 1 reflow requirements.
Does SMAJ24CA-E3/61 require polarity-aware PCB layout?
No - SMAJ24CA-E3/61 is a bidirectional TVS diode with symmetrical electrical characteristics in both directions, so no cathode band marking is present and PCB layout does not require orientation alignment. This simplifies placement in AC-coupled circuits, differential signal lines, or floating grounds where surge polarity is unpredictable. In contrast, the unidirectional SMAJ24A-E3/61 requires strict cathode-to-rail orientation.
What is the maximum operating temperature for SMAJ24CA-E3/61?
The SMAJ24CA-E3/61 has a specified operating junction and storage temperature range of −55 °C to +150 °C. Its thermal resistance from junction to ambient (RθJA) is 120 °C/W on standard 0.2″ × 0.2″ copper pads, meaning power dissipation must be derated above 25 °C ambient to maintain TJ ≤ 150 °C. This rating supports under-hood automotive and industrial control cabinet deployments.
Can SMAJ24CA-E3/61 replace SMAJ24A-E3/61 without redesign?
No - SMAJ24CA-E3/61 cannot be used as a drop-in replacement for SMAJ24A-E3/61 without verifying circuit topology. While both share identical VWM, VBR, and VC, the "CA" suffix denotes bidirectional operation versus unidirectional "A". Substituting SMAJ24CA-E3/61 in a unidirectionally biased layout may cause unintended conduction or reduced surge margin; layout review and functional validation are required before interchange.
SMAJ24CA-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:
- 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):
- 10.3A
- 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)
SMAJ24CA-E3/61 FAQ
1.How can I place an order for SMAJ24CA-E3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ24CA-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 SMAJ24CA-E3/61 reliable?
The price and inventory of SMAJ24CA-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 SMAJ24CA-E3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ24CA-E3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ24CA-E3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ24CA-E3/61?
SMAJ24CA-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ24CA-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 SMAJ24CA-E3/61?
For technical support, including SMAJ24CA-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ24CA-E3/61 requirements.
6.How does Aetrix verify that SMAJ24CA-E3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ24CA-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 SMAJ24CA-E3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ24CA-E3/61?
All SMAJ24CA-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ24CA-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 SMAJ24CA-E3/61 part is unused and in its original packaging.
Return procedure for SMAJ24CA-E3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ24CA-E3/61 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 …
