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Vishay General Semiconductor - Diodes Division SMBJ15CAHE3_A/I
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- Part No.:
- SMBJ15CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15CAHE3_A/I.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,888
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Product details
Overview
SMBJ15CAHE3_A/I from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features a 15 V stand-off voltage (VWM), 24.4 V maximum clamping voltage (VC) at 24.6 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), making it suitable for protecting MOSFETs, ICs, and sensor signal lines in industrial and automotive power systems.
For engineers reviewing the SMBJ15CAHE3_A/I datasheet, SMBJ15CAHE3_A/I pinout, SMBJ15CAHE3_A/I application, or SMBJ15CAHE3_A/I equivalent, this device is evaluated for ESD and surge immunity in DC power rails, low-voltage data interfaces, and AEC-Q101-compliant automotive subsystems where bidirectional clamping and low leakage (<1.0 µA at VWM) are critical.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified at 16.7–18.5 V (min/max) under 1.0 mA test current. Its clamping behavior is defined by a low incremental surge resistance and fast response time - typical junction capacitance is <200 pF at 0 V bias (f = 1 MHz), supporting signal integrity in moderate-speed interfaces.
The device is rated for continuous power dissipation of 5.0 W on infinite heatsink at 50 °C ambient and supports operating junction temperatures from –55 °C to +150 °C. It meets MSL Level 1 per J-STD-020 and is AEC-Q101 qualified, with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum reverse working voltage before clamping begins; defines safe DC operating margin for protected circuitry. |
| VBR (min/max) | 16.7 V / 18.5 V - Breakdown occurs within this range at 1.0 mA; ensures predictable turn-on during transients. |
| VC @ IPPM | 24.4 V - Clamped voltage at 24.6 A peak pulse (10/1000 µs); limits stress on downstream components. |
| IPPM | 24.6 A - Peak surge current capability; determines survivability against IEC 61000-4-5 Level 3/4 surges. |
| PPPM | 600 W - Peak pulse power rating; enables protection against high-energy transients without thermal runaway. |
| ID @ VWM | <1.0 µA - Reverse leakage at stand-off voltage; minimizes quiescent power loss in battery-powered systems. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive and industrial enclosures. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no band marking required. |
| Terminal 2 | Anode / Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping path across protected line and ground or rail. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables reliable suppression of high-energy lightning-induced surges per IEC 61000-4-5 without degradation. |
| AEC-Q101 qualified (HE3 suffix) | Validated for automotive powertrain and body electronics applications requiring zero-failure reliability over temperature cycling. |
| MSL Level 1, 260 °C reflow compatible | Supports standard SMT assembly without moisture sensitivity concerns or pre-bake requirements. |
| Low clamping ratio (VC/VWM = 1.63) | Minimizes overvoltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected MOSFETs. |
| Glass passivated junction | Ensures stable leakage and breakdown characteristics across humidity, temperature, and long-term operational life. |
Applications
| Automotive Power Distribution | Industrial Sensor Signal Lines |
|---|---|
|
Use Scenario: Protection of 12 V battery-fed ECUs against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power rail and chassis ground. Use Value: Limits transient voltage to ≤24.4 V during 100 V/50 ms load dump events, preventing regulator and microcontroller damage. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-capacitance shunt protector on 0–5 V or 4–20 mA output lines. Use Value: Maintains signal fidelity with <200 pF junction capacitance while clamping ESD strikes up to ±15 kV (IEC 61000-4-2). |
| DC Power Input Stage | Telecom Interface Protection |
|
Use Scenario: Input-stage surge protection for 24 V industrial power supplies feeding motor drivers. IC Role / Device Role / Timing Role: Primary TVS in series with fuse and common-mode choke on AC/DC or DC/DC input. Use Value: Absorbs 600 W surge energy without failure, enabling compliance with UL 62368-1 transient immunity requirements. |
Use Scenario: Overvoltage safeguard for RS-485 transceivers in outdoor telecom base stations. IC Role / Device Role / Timing Role: Line-to-line and line-to-ground bidirectional clamp on differential bus pairs. Use Value: Symmetric clamping prevents polarity-dependent failure and maintains common-mode rejection during induced surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CAHM3_A/I | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free material compliance is mandated by OEM environmental policy. | Direct substitution where halogen-free bill-of-materials is required; same footprint and thermal performance. |
| SMAJ15CAHE3_A/I | Lower 400 W PPPM, higher VC (27.7 V), same VWM and package outline but smaller SMA (DO-214AC) case. | Reduced surge handling margin; unsuitable for IEC 61000-4-5 Level 4 or automotive load dump. | Consider only for space-constrained, lower-risk applications where 400 W peak power suffices and PCB layout allows smaller pad geometry. |
Compared with SMBJ15CAHE3_A/I, the HM3 variant offers identical protection performance with halogen-free construction, while the SMAJ15CAHE3_A/I trades 33 % lower surge capacity and larger clamping voltage for reduced board area - selection depends strictly on system-level surge test requirements and material compliance mandates.
Availability
SMBJ15CAHE3_A/I is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, and DC input stage surge suppression requiring stable component supply and AEC-Q101 traceability.
Supply support for SMBJ15CAHE3_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, thermal performance, and automotive-grade qualification.
The SMBJ series was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where consistent clamping, low leakage, and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMBJ15CAHE3_A/I at its rated peak pulse current?
The SMBJ15CAHE3_A/I has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current of 24.6 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry sees no more than 24.4 V during standardized surge events - a critical parameter for ensuring compatibility with 24 V logic and power stages. The SMBJ15CAHE3_A/I achieves this with low incremental surge resistance and stable junction characteristics.
Is SMBJ15CAHE3_A/I suitable for automotive applications?
Yes, SMBJ15CAHE3_A/I is AEC-Q101 qualified and explicitly designated for automotive use via the "HE3" suffix, indicating RoHS-compliant construction and qualification to the full AEC-Q101 stress test suite. It is deployed in engine control units, body control modules, and ADAS power supplies where operation from –40 °C to +125 °C ambient and immunity to load dump transients are required. The SMBJ15CAHE3_A/I meets these demands with its 150 °C TJmax, MSL Level 1 rating, and validated surge endurance.
How does the bidirectional configuration of SMBJ15CAHE3_A/I affect its placement in a circuit?
The SMBJ15CAHE3_A/I has no polarity marking and functions identically in either orientation, making it ideal for protecting AC-coupled lines or DC rails where transient polarity is unpredictable - such as CAN bus lines, RS-485 pairs, or dual-rail power inputs. Unlike unidirectional TVS diodes, the SMBJ15CAHE3_A/I eliminates orientation errors during automated placement and simplifies layout by removing the need for cathode alignment checks. Its symmetrical VBR and VC ensure matched clamping in both directions.
What is the maximum reverse leakage current for SMBJ15CAHE3_A/I at its stand-off voltage?
The SMBJ15CAHE3_A/I exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 15 V stand-off voltage (VWM) and 25 °C ambient temperature. This low leakage preserves battery life in always-on systems and avoids false triggering in high-impedance sensing circuits. At elevated temperatures, leakage remains well below 10 µA up to 85 °C, maintaining design margin for industrial and automotive deployments. The SMBJ15CAHE3_A/I achieves this stability through glass passivation and controlled junction doping.
Can SMBJ15CAHE3_A/I be used in parallel for higher surge current handling?
No - SMBJ15CAHE3_A/I is not recommended for parallel operation due to inherent VBR tolerances (±5.5 % min/max spread) that cause current imbalance during transients, risking thermal runaway in the lower-breakdown unit. For higher surge ratings, Vishay specifies discrete higher-power alternatives (e.g., 1.5KE15CA) or recommends staged protection with upstream current-limiting impedance. The SMBJ15CAHE3_A/I is optimized for single-device deployment in compact layouts where its 600 W rating meets system-level surge requirements.
SMBJ15CAHE3_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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 24.6A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SMBJ15CAHE3_A/I FAQ
1.How can I place an order for SMBJ15CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15CAHE3_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 SMBJ15CAHE3_A/I reliable?
The price and inventory of SMBJ15CAHE3_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 SMBJ15CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ15CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15CAHE3_A/I?
SMBJ15CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15CAHE3_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 SMBJ15CAHE3_A/I?
For technical support, including SMBJ15CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15CAHE3_A/I requirements.
6.How does Aetrix verify that SMBJ15CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ15CAHE3_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 SMBJ15CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ15CAHE3_A/I?
All SMBJ15CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15CAHE3_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 SMBJ15CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMBJ15CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15CAHE3_A/I Tags
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