My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ24A-M3/52
;;2.jpg)
- Part No.:
- SMBJ24A-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24A-M3/52.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,018
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ24A-M3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. It features a 24 V stand-off voltage (VWM), 26.7–29.5 V breakdown voltage (VBR) at 1 mA, 38.9 V maximum clamping voltage (VC) at 15.4 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform.
For engineers reviewing the SMBJ24A-M3/52 datasheet, SMBJ24A-M3/52 pinout, SMBJ24A-M3/52 application, or SMBJ24A-M3/52 equivalent, key selection considerations include its unidirectional polarity, halogen-free RoHS-compliant M3 suffix, 150 °C max junction temperature, low incremental surge resistance, and suitability for IC-level protection in industrial sensor interfaces and automotive power supply rails.
Technical Context
This TVS diode operates as a clamping device in parallel with protected circuitry, conducting only when reverse voltage exceeds its breakdown threshold. Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1 ns), while the SMB package supports automated placement and meets J-STD-020 MSL level 1 (260 °C peak reflow).
The device is rated for 100 A non-repetitive forward surge current (IFSM) and exhibits a typical thermal resistance of 100 °C/W (junction-to-ambient) on standard 5.0 mm × 5.0 mm copper pads. Its temperature coefficient of VBR is +0.096 %/°C, enabling predictable voltage drift over operating temperature range (–55 °C to +150 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 24 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 26.7–29.5 V at 1 mA - Avalanche onset range; ensures reliable triggering during transients without premature conduction. |
| VC (Clamping Voltage) | 38.9 V at IPPM = 15.4 A - Peak voltage seen by protected circuit during 600 W transient; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W with 10/1000 µs waveform - Energy-handling capability for standardized surge events per IEC 61000-4-5. |
| ID (Reverse Leakage) | 1.0 µA max at VWM - Minimal standby power loss and signal integrity impact in high-impedance circuits. |
| TJ max. | +150 °C - Enables operation in under-hood automotive and industrial environments with elevated ambient temperatures. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with cathode band marking; compatible with IPC-7351B footprint. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound, polarity indicated by cathode band on unidirectional types.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-voltage reference; completes clamping path during transient events. |
| Cathode | High-side connection point | Connected to protected line (e.g., 24 V rail); conducts avalanche current when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 surges (4 kV line-to-earth) without degradation when properly mounted. |
| Glass passivated junction | Ensures consistent avalanche behavior and long-term reliability under repetitive transient stress. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for industrial and automotive end equipment without compromising performance. |
| MSL level 1 rating | Supports single-reflow assembly without moisture-related popcorning; no baking required prior to SMT placement. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio alternatives. |
Applications
| Industrial Sensor Interface Protection | Automotive Body Control Module (BCM) Power Rail |
|---|---|
Use Scenario: Protecting 24 V analog sensor signal lines (e.g., pressure, temperature) from ESD and load dump-induced transients in factory automation systems. IC Role / Device Role: Unidirectional TVS placed between signal line and ground to clamp positive-going transients while blocking DC bias. Use Value: Limits voltage excursion to ≤38.9 V during 15.4 A surges, preventing damage to precision ADC inputs and op-amps downstream of SMBJ24A-M3/52. |
Use Scenario: Safeguarding 24 V supply inputs to microcontrollers and CAN transceivers in BCMs exposed to ISO 7637-2 pulse 1 and pulse 3a/b. IC Role / Device Role: Primary clamping element across input rail and chassis ground, absorbing energy from inductive switching noise. Use Value: Withstands 600 W pulses and maintains <1.0 µA leakage at 24 V, preserving low-power sleep mode integrity in SMBJ24A-M3/52-equipped designs. |
| Telecom Power Supply Input Stage | Consumer Appliance Motor Drive Board |
Use Scenario: Secondary protection on AC/DC converter outputs feeding PoE-powered Ethernet switches or base station control logic. IC Role / Device Role: Standoff-clamp TVS placed after primary MOV-based surge suppression to handle residual fast transients. Use Value: Fast <1 ns response and 38.9 V clamping ensure MOSFET gate drivers and voltage regulators remain within safe SOA limits during combined lightning/ESD events. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines or HVAC blowers operating from 24 V DC supplies. IC Role / Device Role: Parallel-connected unidirectional suppressor across motor terminals to limit flyback voltage to safe levels. Use Value: 100 A IFSM rating allows survival of repeated motor stall currents, while 150 °C TJ max enables mounting near heat-generating motor drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A-E3/52 | RoHS-compliant but not halogen-free; same electrical specs and SMB package. | No difference in circuit function; differs only in material compliance profile. | Select E3 if halogen-free requirement is not mandated; M3 preferred for automotive or green-certified industrial programs. |
| SMBJ24CA-M3/52 | Bidirectional variant with symmetric ±24 V standoff and dual-clamp behavior; VBR min/max identical but applies in both polarities. | Required where bidirectional transients (e.g., AC-coupled data lines, differential buses) must be suppressed. | Choose SMBJ24CA-M3/52 only when protecting balanced or AC-signaled paths; SMBJ24A-M3/52 remains optimal for unidirectional DC rails. |
Compared with SMBJ24A-E3/52, the M3 suffix adds halogen-free compliance without altering electrical performance; versus SMBJ24CA-M3/52, the unidirectional SMBJ24A-M3/52 offers lower capacitance and avoids unnecessary bidirectional conduction in DC-biased applications.
Availability
SMBJ24A-M3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom power supply inputs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMBJ24A-M3/52 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, TVS devices, and optoelectronics with emphasis on reliability, power handling, and application-specific optimization.
The SMBJ series was developed for robust, surface-mount transient suppression in harsh environments-targeting automotive, industrial, and telecom systems where compact size, high surge immunity, and AEC-Q101 qualification matter.
FAQ
What is the maximum clamping voltage of SMBJ24A-M3/52 under a 10/1000 µs surge?
The SMBJ24A-M3/52 has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current of 15.4 A using the 10/1000 µs waveform. This value is measured per standard test conditions (TA = 25 °C, mounted on 5.0 mm × 5.0 mm copper pads) and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ24A-M3/52 maintains this clamping performance across its specified operating temperature range.
Is SMBJ24A-M3/52 suitable for automotive applications?
Yes, SMBJ24A-M3/52 is halogen-free and RoHS-compliant, and an AEC-Q101 qualified version (SMBJ24A-HM3_X) is available. While the base SMBJ24A-M3/52 itself is commercial-grade, its 150 °C maximum junction temperature, robust surge rating, and MSL level 1 reflow compatibility make it widely deployed in non-safety-critical automotive subsystems such as body electronics and infotainment power rails. For certified automotive use, specify the HM3 suffix variant.
How does the M3 suffix differ from E3 in SMBJ24A-M3/52?
The M3 suffix indicates halogen-free, RoHS-compliant construction, whereas E3 denotes RoHS-compliant but standard brominated flame-retardant molding compound. Both share identical electrical specifications, thermal ratings, and mechanical dimensions. The SMBJ24A-M3/52 meets stricter environmental mandates (e.g., JEDEC JS709, China RoHS II) and is preferred for green-certified products. No design or layout changes are needed when substituting between E3 and M3 variants.
What is the reverse leakage current of SMBJ24A-M3/52 at its rated stand-off voltage?
The SMBJ24A-M3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 24 V stand-off voltage (VWM), tested at TA = 25 °C. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes quiescent power loss in battery-backed or energy-sensitive systems. The SMBJ24A-M3/52 maintains this specification across its full operating temperature range up to +125 °C.
Can SMBJ24A-M3/52 be used in bidirectional signal line protection?
No-SMBJ24A-M3/52 is a unidirectional TVS diode, intended for DC-biased lines where transients occur primarily in one polarity. For bidirectional protection (e.g., RS-485, CAN, or AC-coupled audio), the SMBJ24CA-M3/52 variant must be used. Attempting to use SMBJ24A-M3/52 on bidirectional paths risks forward conduction during negative excursions, potentially damaging upstream drivers or violating signal thresholds. Always match polarity type to system architecture.
SMBJ24A-M3/52 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ24A-M3/52 FAQ
1.How can I place an order for SMBJ24A-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24A-M3/52 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 SMBJ24A-M3/52 reliable?
The price and inventory of SMBJ24A-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ24A-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ24A-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24A-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24A-M3/52?
SMBJ24A-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24A-M3/52 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 SMBJ24A-M3/52?
For technical support, including SMBJ24A-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24A-M3/52 requirements.
6.How does Aetrix verify that SMBJ24A-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ24A-M3/52 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 SMBJ24A-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ24A-M3/52?
All SMBJ24A-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24A-M3/52, 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 SMBJ24A-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ24A-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24A-M3/52 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 …
