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Vishay General Semiconductor - Diodes Division SMCJ24A-M3/57T
- Part No.:
- SMCJ24A-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24A-M3/57T.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMCJ24A-M3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on power and signal lines. It features a 24 V standoff voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 38.6 A peak pulse current (IPPM), and 38.9 V maximum clamping voltage (VC) under 10/1000 μs surge - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power rails.
For engineers reviewing the SMCJ24A-M3/57T datasheet, SMCJ24A-M3/57T pinout, SMCJ24A-M3/57T application, or SMCJ24A-M3/57T equivalent, key selection criteria include unidirectional polarity, 1500 W peak pulse power rating, 1.0 μA max reverse leakage at VWM, -55 °C to +150 °C operating junction temperature, and halogen-free RoHS-compliant M3 suffix construction.
Technical Context
The SMCJ24A-M3/57T operates as a silicon avalanche diode with glass-passivated junction, delivering fast response time (<1 ps) and low incremental surge resistance to suppress ESD, lightning-induced surges, and inductive switching transients. Its clamping behavior follows IEEE C62.35 standards, with thermal resistance RθJA = 75 °C/W and RθJL = 15 °C/W enabling reliable operation on standard 8.0 mm × 8.0 mm copper pads.
Designed for automated SMT placement, it meets J-STD-020 MSL Level 1 (peak reflow 260 °C) and JESD201 Class 2 whisker resistance. The cathode band denotes polarity; no marking is used for bidirectional variants - but SMCJ24A-M3/57T is explicitly unidirectional per ordering code and electrical table.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 24 V - maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 26.7–29.5 V at IT = 1 mA - guaranteed avalanche initiation range; ensures predictable turn-on during overvoltage events |
| VC (Clamping Voltage) | 38.9 V at IPPM = 38.6 A - peak voltage seen by protected circuit during 10/1000 μs surge; determines downstream component stress |
| PPPM (Peak Pulse Power) | 1500 W - maximum non-repetitive surge energy absorption capability; validates robustness against IEC 61000-4-5 Level 4 transients |
| IPPM (Peak Pulse Current) | 38.6 A - surge current capacity under standardized 10/1000 μs waveform; correlates directly with PCB trace and fuse sizing |
| TJ Range | -55 °C to +150 °C - qualified junction temperature range; supports under-hood automotive and industrial ambient conditions |
| Leakage (ID) | ≤1.0 μA at VWM - minimal standby power loss and signal integrity impact in high-impedance circuits |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, halogen-free, RoHS-compliant (M3 suffix), matte tin-plated leads solderable per J-STD-002 and JESD22-B102. Cathode indicated by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; connected to ground or low-side reference in unidirectional TVS configuration | Provides return path for surge current; must be routed with low-inductance connection to minimize clamping overshoot |
| Cathode | Current exit terminal in forward bias; connected to protected line (e.g., 24 V rail or signal input) | Defines polarity-sensitive protection direction; band marking enables automated optical inspection and placement verification |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power rating | Enables single-device protection against severe transients per IEC 61000-4-5 (4 kV, 2 Ω source), reducing need for cascaded protection stages |
| Low clamping ratio (VC/VWM ≈ 1.62) | Minimizes overvoltage stress on downstream components - critical for 3.3 V/5 V logic interfacing with 24 V systems |
| Glass-passivated chip junction | Ensures stable VBR and leakage performance across temperature and long-term operation; eliminates passivation-related drift |
| MSL Level 1 moisture sensitivity | Allows direct placement without baking; compatible with standard SMT reflow profiles up to 260 °C peak |
| AEC-Q101 qualification available (HE3/HM3 variants) | Confirms reliability for automotive powertrain and body electronics - SMCJ24A-M3/57T is commercial-grade but shares identical die and package design |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: 24 V battery-supplied control modules exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V input and chassis ground to clamp transients before DC/DC converter input stage. Use Value: Limits voltage to ≤38.9 V during 38.6 A surge, preventing damage to upstream regulators rated for 40 V absolute maximum. |
Use Scenario: Analog sensor outputs (e.g., pressure, temperature) routed through long harnesses in factory automation cabinets. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt ESD (IEC 61000-4-2 ±8 kV contact) and inductive kickback from nearby solenoid switching. Use Value: Sub-1 μA leakage preserves microamp-level sensor bias accuracy; 38.9 V clamping protects 24 V-tolerant op-amps and ADC inputs. |
| Telecom DC Power Feeding | Motor Drive Gate Driver Protection |
|
Use Scenario: Remote radio units powered via 24–48 V PoE-like feeds over outdoor cabling susceptible to lightning-induced surges. IC Role / Device Role / Timing Role: Primary transient suppression on DC feed line prior to hot-swap controller and backup capacitor bank. Use Value: 1500 W rating handles multi-kA induced surges; DO-214AB package provides mechanical robustness for field-deployed enclosures. |
Use Scenario: Isolated gate drivers (e.g., SiC MOSFET half-bridges) where Miller capacitance coupling induces voltage spikes on low-side driver supply rails. IC Role / Device Role / Timing Role: TVS on VSS rail referenced to power ground to clamp negative-going transients during high dV/dt switching events. Use Value: Fast avalanche response (<1 ps) prevents false triggering of driver UVLO; 1.0 μA leakage avoids quiescent current accumulation in multi-channel designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A-M3/52T | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VC specs | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a or IEC 61000-4-5 Level 4 | Select when board space is constrained and surge threat level is ≤600 W (e.g., secondary protection or low-power peripherals) |
| SMCJ24CA-M3/57T | Bidirectional variant; identical VWM, VBR, VC, and PPPM, but symmetric clamping in both polarities | Required for AC-coupled or floating signal lines (e.g., RS-485, CAN bus) where polarity reversal may occur | Choose only if bidirectional protection is mandated; unidirectional SMCJ24A-M3/57T offers better cost and layout simplicity for DC rails |
Compared with SMBJ24A-M3/52T and SMCJ24CA-M3/57T, the SMCJ24A-M3/57T delivers optimal balance of 1500 W surge handling, SMC package ruggedness, and unidirectional efficiency for 24 V DC power line protection - avoiding unnecessary complexity or derating.
Availability
SMCJ24A-M3/57T is available at Aetrix Electronics and suitable for automotive control units, industrial PLC I/O modules, telecom remote power feeds, and motor drive subsystems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMCJ24A-M3/57T 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, precision, and application-specific optimization.
The SMCJ series was developed for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where failure modes demand proven clamping consistency and thermal resilience.
FAQ
What is the maximum clamping voltage of the SMCJ24A-M3/57T under a 10/1000 μs surge?
The SMCJ24A-M3/57T has a maximum clamping voltage (VC) of 38.9 V at 38.6 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 09-Jan-2024. It represents the highest voltage the protected circuit will experience during a worst-case transient event, making it critical for verifying compatibility with downstream component voltage ratings. The SMCJ24A-M3/57T maintains this clamping performance across its full operating temperature range.
Is the SMCJ24A-M3/57T suitable for automotive applications requiring AEC-Q101 qualification?
The SMCJ24A-M3/57T itself is a commercial-grade part with M3 halogen-free RoHS compliance but is not AEC-Q101 qualified. However, Vishay offers functionally identical AEC-Q101 variants under ordering codes SMCJ24A-HM3/57T and SMCJ24A-HE3/57T - sharing the same die, SMC package, and electrical specifications. For automotive production, engineers should specify those qualified versions; the SMCJ24A-M3/57T remains appropriate for prototyping, industrial, or non-safety-critical automotive subsystems where formal qualification is not mandated.
How does the SMCJ24A-M3/57T differ from the bidirectional SMCJ24CA-M3/57T?
The SMCJ24A-M3/57T is unidirectional, with polarity marked by a cathode band and intended for DC line protection where surge direction is known (e.g., 24 V rail to ground). In contrast, the SMCJ24CA-M3/57T is bidirectional, offering symmetric clamping for AC signals or floating lines like RS-485 or CAN bus. Both share identical VWM (24 V), VC (38.9 V), and PPPM (1500 W), but the SMCJ24A-M3/57T provides lower cost and simpler layout for unidirectional use cases. Selecting SMCJ24A-M3/57T avoids unnecessary bidirectional overhead unless polarity reversal is possible.
What is the thermal resistance of the SMCJ24A-M3/57T, and how does it affect PCB layout?
The SMCJ24A-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W, measured on 8.0 mm × 8.0 mm copper pads per terminal. These values require adequate copper area and thermal vias for sustained power dissipation - especially during repetitive surges. Layout best practices include using minimum 8 mm² pad area per lead, connecting pads to internal ground/power planes via ≥3 thermal vias (0.3 mm diameter), and avoiding narrow traces that increase thermal impedance. The SMCJ24A-M3/57T's RθJA confirms suitability for compact industrial modules when thermally optimized.
Does the SMCJ24A-M3/57T meet moisture sensitivity level (MSL) requirements for standard SMT assembly?
Yes, the SMCJ24A-M3/57T meets J-STD-020 Moisture Sensitivity Level 1, with a maximum peak reflow temperature of 260 °C. This means it can be placed directly onto PCBs without pre-baking and is compatible with standard lead-free reflow profiles. The M3 suffix confirms halogen-free, RoHS-compliant construction with matte tin-plated leads solderable per J-STD-002 and JESD22-B102. This MSL Level 1 rating simplifies manufacturing logistics and reduces risk of popcorning during reflow - a key advantage of the SMCJ24A-M3/57T in high-volume SMT production environments.
SMCJ24A-M3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 24V
- Voltage - Breakdown (Min):
- 26.7V
- Voltage - Clamping (Max) @ Ipp:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 38.6A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMC)
SMCJ24A-M3/57T FAQ
1.How can I place an order for SMCJ24A-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24A-M3/57T 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 SMCJ24A-M3/57T reliable?
The price and inventory of SMCJ24A-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ24A-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ24A-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24A-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24A-M3/57T?
SMCJ24A-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24A-M3/57T 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 SMCJ24A-M3/57T?
For technical support, including SMCJ24A-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24A-M3/57T requirements.
6.How does Aetrix verify that SMCJ24A-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ24A-M3/57T 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 SMCJ24A-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ24A-M3/57T?
All SMCJ24A-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24A-M3/57T, 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 SMCJ24A-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ24A-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ24A-M3/57T Tags
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