My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ24CAHM3_A/I
- Part No.:
- SMBJ24CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ24CAHM3_A/I.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,272
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ24CAHM3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 24 V standoff voltage (VWM), 38.9 V maximum clamping voltage (VC) at 15.4 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), suitable for protecting MOSFETs, ICs, and sensor interfaces in industrial and telecom equipment.
For engineers reviewing the SMBJ24CAHM3_A/I datasheet, SMBJ24CAHM3_A/I pinout, SMBJ24CAHM3_A/I application, or SMBJ24CAHM3_A/I equivalent, key selection criteria include bidirectional surge suppression capability, 24 V operating voltage compatibility, low clamping ratio (VC/VWM = 1.62), AEC-Q101 qualification status, and halogen-free RoHS-compliant packaging for automotive-grade reliability.
Technical Context
This device operates as a voltage-clamping protector with symmetrical breakdown behavior in both polarities due to its bidirectional construction. Its glass-passivated junction ensures stable avalanche characteristics, while the low incremental surge resistance enables effective energy diversion during transient events such as inductive switching or ESD.
The SMBJ24CAHM3_A/I delivers consistent clamping performance across -55 °C to +150 °C junction temperature range, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting reliable operation under repetitive surge conditions at ≤0.01% duty cycle when mounted on 5.0 mm × 5.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin for 24 V rail protection. |
| VBR min / max | 26.7 V / 29.5 V - Breakdown voltage range at 1 mA test current; ensures predictable turn-on threshold across production lots. |
| VC @ IPPM | 38.9 V - Clamped voltage at 15.4 A peak pulse current (10/1000 µs); limits downstream component stress during surge events. |
| PPPM | 600 W - Peak pulse power handling per 10/1000 µs waveform; supports robust protection against lightning-induced surges and load dump. |
| IPPM | 15.4 A - Maximum non-repetitive peak pulse current; determines minimum trace width and PCB layout requirements for surge path. |
| TJ max | +150 °C - Maximum junction temperature; enables use in high-ambient environments like engine control units or industrial drives. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated placement and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 compliant (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias; common node for bidirectional conduction path | No polarity marking on device body; symmetric terminals enable mounting without orientation constraints in AC-coupled or floating circuits. |
| Cathode | Current exit terminal in forward bias; forms complementary path with Anode | Identical physical structure to Anode; bidirectional operation eliminates need for directional placement during assembly. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals or floating DC buses without polarity concerns, reducing BOM count and layout complexity. |
| 600 W peak pulse power | Handles high-energy transients such as ISO 7637-2 Pulse 5a (load dump) up to 15.4 A without degradation when properly heatsinked. |
| AEC-Q101 qualified | Validated for automotive applications including body electronics and infotainment systems where reliability under thermal cycling and vibration is critical. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global OEM programs and supports lead-free reflow profiles without compromising surge performance. |
| Low clamping ratio (VC/VWM = 1.62) | Minimizes overvoltage exposure to protected ICs, extending lifetime of sensitive components like microcontrollers and CAN transceivers. |
Applications
| Automotive Body Control Module | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting LIN bus lines and power inputs in door module ECUs exposed to load dump and jump-start transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt surge energy before reaching MCU and LIN transceiver. Use Value: Maintains system uptime by preventing latch-up or permanent damage to 24 V-rated microcontrollers during 12 V system load dump events. |
Use Scenario: Safeguarding analog output lines (4–20 mA) and digital I/O of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Fast-response voltage limiter installed adjacent to sensor connector to suppress ESD and inductive kickback from solenoid drivers. Use Value: Ensures measurement integrity by limiting transient overvoltage to <39 V, well below the 40 V absolute maximum rating of typical industrial ADC front-ends. |
| Telecom Power Supply Input | Consumer Appliance Motor Drive |
|
Use Scenario: Secondary-side overvoltage protection on 24 V DC input rails of VoIP gateways and base station management cards. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between VIN and GND to clamp surges induced by nearby AC line disturbances or hot-swap events. Use Value: Prevents brownout resets and latch-up in PoE-powered devices by clamping transients within 1 ns response time and holding VC ≤ 38.9 V. |
Use Scenario: Input rail protection for BLDC motor controllers in smart washing machines subjected to relay contact bounce and brush arcing. IC Role / Device Role / Timing Role: Bidirectional suppressor placed across H-bridge supply pins to absorb commutation spikes and prevent gate driver failure. Use Value: Extends controller lifespan by limiting voltage overshoot to 38.9 V during 15.4 A inductive turn-off events, avoiding MOSFET avalanche stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24CAHE3_A/I | Same electrical specs but RoHS-compliant commercial grade (non-halogen-free); no AEC-Q101 qualification | Suitable for non-automotive industrial or consumer applications where halogen-free requirement is not mandated | Select when cost sensitivity outweighs halogen-free compliance or automotive qualification needs. |
| SMAJ24CAHM3_A/I | Lower 400 W peak pulse power; same VWM, VBR, and VC; SMA (DO-214AC) package with smaller 4.5 mm × 2.7 mm footprint | Better suited for space-constrained designs with lower surge threat levels (e.g., USB port protection) | Choose when board area is limited and surge energy does not exceed 400 W, accepting reduced robustness vs. SMBJ series. |
Compared with SMBJ24CAHE3_A/I, the SMBJ24CAHM3_A/I adds halogen-free compliance and AEC-Q101 qualification for automotive use; versus SMAJ24CAHM3_A/I, it provides 50% higher surge power handling in a slightly larger SMB package-critical for industrial power rail protection.
Availability
SMBJ24CAHM3_A/I is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, telecom power supplies, and appliance motor drive systems requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ24CAHM3_A/I 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was developed for high-power transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 compliance, and precise clamping performance are mandatory.
FAQ
What is the clamping voltage of SMBJ24CAHM3_A/I at its rated peak pulse current?
The SMBJ24CAHM3_A/I has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current of 15.4 A using the standard 10/1000 µs waveform. This value is measured under defined test conditions per JEDEC standards and ensures predictable overvoltage limiting for downstream circuitry protected by the SMBJ24CAHM3_A/I.
Is SMBJ24CAHM3_A/I suitable for automotive applications?
Yes, SMBJ24CAHM3_A/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials, making it suitable for automotive applications including body control modules, infotainment power rails, and sensor interfaces where reliability under thermal cycling and surge stress is required. The SMBJ24CAHM3_A/I meets all stress test requirements defined in the AEC-Q101 standard.
How does the bidirectional design of SMBJ24CAHM3_A/I affect its PCB layout?
The bidirectional design of SMBJ24CAHM3_A/I eliminates polarity marking on the SMB (DO-214AA) package, allowing unrestricted orientation during automated placement. Unlike unidirectional TVS diodes, the SMBJ24CAHM3_A/I requires no anode/cathode alignment-reducing assembly errors and enabling simplified routing for AC-coupled or floating signal lines where voltage polarity may reverse.
What is the thermal resistance of SMBJ24CAHM3_A/I and how does it impact derating?
SMBJ24CAHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W. These values require derating of peak pulse power above 25 °C ambient, per Figure 2 in the Vishay datasheet 88392; for example, at 85 °C ambient, the SMBJ24CAHM3_A/I must be operated at ≤65% of its 600 W rating to maintain safe junction temperature.
Can SMBJ24CAHM3_A/I replace SMBJ24A in a design?
No-SMBJ24CAHM3_A/I is bidirectional while SMBJ24A is unidirectional, meaning they differ fundamentally in conduction behavior and circuit integration. Replacing SMBJ24A with SMBJ24CAHM3_A/I in a DC-biased application may cause unintended conduction paths or fail to suppress negative-going transients correctly. Always verify polarity requirements before substituting the SMBJ24CAHM3_A/I.
SMBJ24CAHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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:
- 38.9V
- Current - Peak Pulse (10/1000µs):
- 15.4A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ24CAHM3_A/I FAQ
1.How can I place an order for SMBJ24CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ24CAHM3_A/I 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 SMBJ24CAHM3_A/I reliable?
The price and inventory of SMBJ24CAHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ24CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ24CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ24CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ24CAHM3_A/I?
SMBJ24CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ24CAHM3_A/I 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 SMBJ24CAHM3_A/I?
For technical support, including SMBJ24CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ24CAHM3_A/I requirements.
6.How does Aetrix verify that SMBJ24CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ24CAHM3_A/I 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 SMBJ24CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ24CAHM3_A/I?
All SMBJ24CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ24CAHM3_A/I, 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 SMBJ24CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMBJ24CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ24CAHM3_A/I 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 …
