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Vishay General Semiconductor - Diodes Division SMCJ24CAHE3_A/I
- Part No.:
- SMCJ24CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ24CAHE3_A/I.pdf
- Description:
- TVS DIODE 24VWM 38.9VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,500
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Product details
Overview
SMCJ24CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection with 1500 W peak pulse power rating, 24 V standoff voltage (VWM), and 38.9 V maximum clamping voltage (VC) at 38.6 A peak pulse current (IPPM). It protects sensitive ICs and MOSFETs against inductive switching transients and lightning-induced surges in automotive and industrial power rails.
For engineers reviewing the SMCJ24CAHE3_A/I datasheet, SMCJ24CAHE3_A/I pinout, SMCJ24CAHE3_A/I application, or SMCJ24CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, 1500 W surge handling, low incremental surge resistance, and compatibility with automated SMT assembly on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 MΩ leakage at 24 V), but triggers into low-impedance conduction when transient voltage exceeds its 26.7–29.5 V breakdown range (VBR at 1 mA), limiting downstream voltage to ≤38.9 V. Its glass-passivated junction ensures stable avalanche behavior and fast response (<1 ns).
Thermally, it features RθJA = 75 °C/W and RθJL = 15 °C/W, enabling reliable operation up to TJ = +150 °C. The bidirectional symmetry means identical electrical characteristics apply in both polarities-no cathode/anode distinction-making it suitable for AC signal lines and floating DC buses where polarity reversal may occur.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 24 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working margin for 24 V nominal systems. |
| VBR min/max | 26.7 V / 29.5 V at 1 mA - Confirmed breakdown threshold range ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | 38.9 V at 38.6 A - Clamped voltage during 10/1000 µs surge; determines worst-case stress on protected circuitry. |
| PPPM | 1500 W - Peak pulse power handling per 10/1000 µs waveform; supports robust protection against IEC 61000-4-5 Level 4 surges. |
| ID @ VWM | 1.0 µA - Reverse leakage at 24 V; negligible power loss and minimal impact on high-impedance sensor or logic inputs. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 7.11 mm × 6.22 mm × 2.62 mm (L × W × H); terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Electrically symmetric terminal; functions as either anode or cathode depending on instantaneous voltage polarity - no fixed polarity assignment. |
| Terminal 2 | Anode / Cathode (bidirectional) | Identical to Terminal 1; forms a non-polarized two-terminal device - installed without orientation constraints on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled signals or floating DC busses without polarity concerns or external diode pairing. |
| AEC-Q101 qualification | Validates suitability for automotive powertrain, body electronics, and ADAS modules requiring extended temperature and lifetime reliability. |
| 1500 W peak pulse power | Supports compliance with IEC 61000-4-5 (10/1000 µs) surge immunity up to 4 kV open-circuit voltage in system-level testing. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes protected circuit overvoltage margin - critical for safeguarding 3.3 V or 5 V logic interfaces adjacent to 24 V supply rails. |
| MSL Level 1 (260 °C peak) | Permits standard lead-free reflow without moisture sensitivity concerns - eliminates baking requirements prior to SMT assembly. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting LIN bus transceivers and body control module power inputs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly across 24 V supply rail upstream of LDO regulators and CAN/LIN PHYs. Use Value: Limits voltage excursions to ≤38.9 V during 120 V/50 ms load dump events, preventing latch-up or gate oxide damage in downstream ICs. |
Use Scenario: Safeguarding analog outputs of pressure/temperature sensors connected to PLC analog input cards. IC Role / Device Role / Timing Role: Bidirectional clamp on 4–20 mA loop or ±10 V differential signal lines exposed to field wiring surges. Use Value: Maintains signal integrity by clamping induced transients to <40 V while adding <1 pF capacitance - no bandwidth degradation. |
| Telecom DC Power Feeds | Consumer Appliance Motor Control |
|
Use Scenario: Surge suppression on -48 V DC telecom power distribution boards feeding remote radio units. IC Role / Device Role / Timing Role: Primary protection device mounted at board edge, coordinated with upstream GDT or MOV for multi-stage defense. Use Value: Absorbs 1500 W surges without degradation, enabling compliance with GR-1089-CORE Class 3 telecom immunity requirements. |
Use Scenario: Protecting half-bridge gate drivers in smart home appliance motor inverters from inductive kickback during PWM switching. IC Role / Device Role / Timing Role: Clamp placed across high-side and low-side MOSFET source-drain paths to suppress VDS spikes. Use Value: Responds in <1 ns to limit VDS overshoot to 38.9 V, reducing risk of MOSFET avalanche failure and EMI generation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC24CA | Lower PPPM (600 W), same VWM (24 V), higher VC (43.5 V), smaller SMA package. | Targeted at space-constrained consumer electronics; insufficient for automotive load dump or industrial 4 kV surge testing. | Select only when board area is critical and surge energy is limited to <600 W. |
| SMCJ24CDHE3_A/I | Unidirectional variant with identical VWM, VBR, and PPPM, but includes cathode band marking and forward voltage (VF = 3.5 V @ 100 A). | Required where DC-biased circuits need asymmetric clamping (e.g., protecting only positive rail of unidirectional supply). | Choose SMCJ24CDHE3_A/I only if polarity-aware protection is needed; otherwise SMCJ24CAHE3_A/I offers simpler layout and bidirectional coverage. |
Compared with SAC24CA and SMCJ24CDHE3_A/I, the SMCJ24CAHE3_A/I delivers superior surge energy handling (1500 W vs. 600 W), lower clamping voltage (38.9 V vs. 43.5 V), and true bidirectional symmetry - making it the optimal choice for automotive, industrial, and telecom applications demanding full-polarity transient immunity without layout compromises.
Availability
SMCJ24CAHE3_A/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, telecom DC power feeds, and consumer appliance motor control requiring stable component supply and AEC-Q101-compliant surge resilience.
Supply support for SMCJ24CAHE3_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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific performance.
The SMCJ series was developed to deliver high-power, surface-mount transient protection for harsh-environment applications-including automotive, industrial, and telecom-where robustness, AEC-Q101 validation, and precise clamping are mandatory.
FAQ
What is the clamping voltage of SMCJ24CAHE3_A/I at its rated peak pulse current?
The SMCJ24CAHE3_A/I has a maximum clamping voltage (VC) of 38.9 V when subjected to its rated peak pulse current (IPPM) of 38.6 A under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet revision 09-Jan-2024 (Document Number: 88394). The low clamping ratio ensures effective protection of 24 V system components without overstressing downstream ICs or MOSFETs.
Is SMCJ24CAHE3_A/I suitable for automotive applications?
Yes, SMCJ24CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use with ordering code suffix "HE3". It meets rigorous stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD, and is rated for operation from –55 °C to +150 °C. Its 1500 W surge rating and bidirectional symmetry make it ideal for protecting ECUs, body controllers, and ADAS power supplies against load dump and ISO 7637-2 transients.
How does the bidirectional design of SMCJ24CAHE3_A/I affect PCB layout?
The bidirectional design of SMCJ24CAHE3_A/I eliminates polarity marking - there is no cathode band or directional orientation required during placement. This simplifies PCB layout, reduces assembly errors, and enables use on AC-coupled lines or floating DC nodes where voltage polarity may reverse. Unlike unidirectional variants (e.g., SMCJ24ADHE3_A/I), the SMCJ24CAHE3_A/I requires no attention to terminal orientation, streamlining automated pick-and-place and inspection.
What is the thermal resistance of SMCJ24CAHE3_A/I, and how does it impact power dissipation?
The SMCJ24CAHE3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead resistance (RθJL) of 15 °C/W. These values assume mounting on the recommended 8.0 mm × 8.0 mm copper pads per terminal. At ambient temperatures up to +85 °C, the device maintains full 6.5 W steady-state power dissipation capability - critical for sustained leakage management in hot environments like engine compartments or enclosed industrial drives.
Does SMCJ24CAHE3_A/I meet RoHS and halogen-free requirements?
Yes, SMCJ24CAHE3_A/I is RoHS-compliant and AEC-Q101 qualified, indicated by the "HE3" suffix. It conforms to Vishay's material categorization per document 99912 and satisfies JEDEC J-STD-020 MSL Level 1 (peak reflow temperature 260 °C). While not halogen-free (which would require "HM3" suffix), it is fully compliant with EU RoHS Directive 2011/65/EU and China RoHS, with lead content below 0.1 wt% and no intentionally added restricted substances.
SMCJ24CAHE3_A/I 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:
- -
- Bidirectional Channels:
- 1
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ24CAHE3_A/I FAQ
1.How can I place an order for SMCJ24CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ24CAHE3_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 SMCJ24CAHE3_A/I reliable?
The price and inventory of SMCJ24CAHE3_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 SMCJ24CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMCJ24CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ24CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ24CAHE3_A/I?
SMCJ24CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ24CAHE3_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 SMCJ24CAHE3_A/I?
For technical support, including SMCJ24CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ24CAHE3_A/I requirements.
6.How does Aetrix verify that SMCJ24CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMCJ24CAHE3_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 SMCJ24CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMCJ24CAHE3_A/I?
All SMCJ24CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ24CAHE3_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 SMCJ24CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMCJ24CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ24CAHE3_A/I Tags
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