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Vishay General Semiconductor - Diodes Division SMB8J15CAHM3_A/I
- Part No.:
- SMB8J15CAHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J15CAHM3_A/I.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,073
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Product details
Overview
SMB8J15CAHM3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection on signal and power lines. It features a 15 V stand-off voltage (VWM), 24.4 V maximum clamping voltage (VC) at 32.8 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMB8J15CAHM3_A/I datasheet, SMB8J15CAHM3_A/I pinout, SMB8J15CAHM3_A/I application, or SMB8J15CAHM3_A/I equivalent, this device is evaluated for AEC-Q101 qualified bidirectional surge suppression in 12 V/24 V automotive subsystems, ESD-sensitive analog front-ends, and CAN/LIN bus line protection where low clamping voltage and fast response (<1 ns) are critical.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling robust protection against voltage transients from either direction without polarity dependency. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1 µA at VWM), while the MSL Level 1 moisture sensitivity rating supports lead-free reflow up to 260 °C.
The device complies with ANSI/IEEE C62.35 surge standards and delivers consistent clamping performance under repetitive 10/1000 µs surges up to 150 °C junction temperature. Thermal resistance (RθJA = 72 °C/W) and RθJL = 20 °C/W support reliable power dissipation on standard 5.0 mm × 5.0 mm copper pads per terminal.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR (min/max) | 16.7 V / 18.5 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on threshold. |
| VC @ IPPM | 24.4 V - Clamping voltage measured at 32.8 A peak pulse current; limits downstream voltage stress during surge events. |
| PPPM | 800 W - Peak pulse power handling with 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity. |
| ID @ VWM | <1 µA - Reverse leakage at 15 V stand-off; preserves signal integrity in high-impedance sensor circuits. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads solderable per J-STD-002. No polarity marking - bidirectional symmetry eliminates cathode/anode orientation concerns during placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; surge current flows bidirectionally through the same junction structure. |
| Cathode Band (absent) | Polarity indicator | Not applicable - bidirectional construction omits marking; PCB layout requires no directional alignment. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive electronics including engine control units, body controllers, and ADAS sensor modules. |
| Low clamping voltage (24.4 V) | Protects 15 V-rated ICs (e.g., CAN transceivers, LIN drivers) by limiting surge-induced overvoltage below damage thresholds. |
| MSL Level 1 rating | Enables single-pass lead-free reflow at 260 °C without preconditioning, reducing manufacturing complexity. |
| Glass-passivated junction | Ensures stable VBR over lifetime and temperature, minimizing parameter drift in harsh industrial environments. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets automotive environmental compliance requirements (e.g., ELV, REACH) and supports green manufacturing programs. |
Applications
| Automotive Sensor Protection | CAN Bus Line Protection |
|---|---|
Use Scenario: Protecting pressure, temperature, and position sensors in engine bay and chassis modules from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional TVS clamps transients before they reach analog front-end amplifiers or ADC inputs. Use Value: Maintains sensor accuracy by limiting voltage excursion to ≤24.4 V during 1000 W surges, preventing latch-up or parametric shift. | Use Scenario: Shielding high-speed CAN FD transceivers (e.g., TJA1044, SN65HVD256) from ESD and coupled noise on differential bus lines. IC Role / Device Role / Timing Role: Fast-response TVS absorbs ±8 kV contact ESD (IEC 61000-4-2) and common-mode surges without distorting signal edges. Use Value: Preserves CAN bit timing integrity by clamping within <1 ns and adding <0.5 pF junction capacitance at zero bias. |
| Industrial I/O Protection | Power Supply Rail Clamp |
Use Scenario: Safeguarding PLC digital input modules connected to 24 V DC field wiring exposed to relay coil kickback and lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS shunts transient energy away from optocoupler inputs and microcontroller GPIOs. Use Value: Enables >20,000 surge cycles at 800 W without degradation, supporting long-life industrial deployment. | Use Scenario: Secondary-level clamping on 15 V auxiliary rails feeding infotainment processors and display drivers in automotive head units. IC Role / Device Role / Timing Role: Complements primary MOV or fuse-based protection by providing precise low-voltage clamping near IC supply pins. Use Value: Reduces rail overshoot to <24.4 V during 12 V system load dump events, preventing brownout resets and latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J15CAHE3_A/I | Same electrical specs; RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Restricted to commercial/industrial use; not approved for automotive production. | Select when AEC-Q101 is not required and halogen-free material is not mandated. |
| SMAJ15CA | Lower PPPM (400 W); larger SMA package (DO-214AC); higher RθJA (90 °C/W). | Insufficient for IEC 61000-4-5 Level 4; unsuitable for space-constrained automotive PCBs. | Choose only for cost-sensitive, non-automotive designs with relaxed surge requirements and available board area. |
Compared with SMB8J15CAHE3_A/I and SMAJ15CA, the SMB8J15CAHM3_A/I uniquely combines AEC-Q101 qualification, halogen-free construction, and 800 W surge capability in the compact SMB footprint - making it the only option qualified for safety-critical automotive signal line protection.
Availability
SMB8J15CAHM3_A/I is available at Aetrix Electronics and suitable for automotive sensor modules, CAN/LIN bus interfaces, and industrial PLC I/O requiring stable component supply with full AEC-Q101 traceability and halogen-free compliance.
Supply support for SMB8J15CAHM3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMB8JxxCA series belongs to Vishay's TRANSZORB® TVS family, engineered specifically for high-power-density, AEC-Q101-qualified transient suppression in automotive and industrial environments where compact size and repeatable clamping performance are mandatory.
FAQ
What is the peak pulse power rating of SMB8J15CAHM3_A/I and under what waveform condition is it specified?
The SMB8J15CAHM3_A/I has a peak pulse power rating of 800 W, tested using the standardized 10/1000 µs double-exponential surge waveform defined in ANSI/IEEE C62.35. This rating applies to bidirectional operation and is validated at 25 °C ambient with proper PCB thermal relief (0.2" × 0.2" copper pads per terminal). Derating is required above 25 °C per Figure 2 in the Vishay datasheet 88422.
Is SMB8J15CAHM3_A/I suitable for protecting CAN FD physical layer circuits?
Yes, SMB8J15CAHM3_A/I is suitable for CAN FD line protection due to its low 24.4 V clamping voltage at 32.8 A, sub-nanosecond response time, and <0.5 pF junction capacitance at zero bias - all confirmed in Vishay's datasheet 88422. Its AEC-Q101 qualification and bidirectional symmetry ensure robustness against ESD and common-mode surges without distorting high-speed (up to 5 Mbps) differential signaling.
How does the HM3 suffix in SMB8J15CAHM3_A/I differ from the HE3 suffix?
The HM3 suffix in SMB8J15CAHM3_A/I indicates halogen-free, RoHS-compliant, and AEC-Q101-qualified construction, whereas HE3 denotes RoHS-compliant and AEC-Q101-qualified but not halogen-free. Both share identical electrical parameters and package dimensions, but HM3 meets stricter automotive material compliance standards (e.g., VW 80101) where brominated flame retardants are prohibited.
What is the maximum reverse leakage current of SMB8J15CAHM3_A/I at its 15 V stand-off voltage?
The maximum reverse leakage current (ID) of SMB8J15CAHM3_A/I is 1.0 µA at the 15 V stand-off voltage (VWM), measured at 25 °C ambient per Vishay datasheet 88422. This low leakage preserves signal fidelity in high-impedance sensor interfaces and prevents false triggering in precision analog circuits powered from the same rail.
Does SMB8J15CAHM3_A/I require polarity-aware PCB layout?
No, SMB8J15CAHM3_A/I does not require polarity-aware PCB layout because it is a bidirectional TVS diode with symmetrical terminal functionality. The device lacks a cathode band or other polarity marking, and its electrical characteristics are identical in both directions - simplifying automated placement and eliminating orientation errors during assembly.
SMB8J15CAHM3_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):
- 32.8A
- Power - Peak Pulse:
- 800W
- 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)
SMB8J15CAHM3_A/I FAQ
1.How can I place an order for SMB8J15CAHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J15CAHM3_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 SMB8J15CAHM3_A/I reliable?
The price and inventory of SMB8J15CAHM3_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 SMB8J15CAHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMB8J15CAHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J15CAHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J15CAHM3_A/I?
SMB8J15CAHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J15CAHM3_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 SMB8J15CAHM3_A/I?
For technical support, including SMB8J15CAHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J15CAHM3_A/I requirements.
6.How does Aetrix verify that SMB8J15CAHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMB8J15CAHM3_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 SMB8J15CAHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMB8J15CAHM3_A/I?
All SMB8J15CAHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J15CAHM3_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 SMB8J15CAHM3_A/I part is unused and in its original packaging.
Return procedure for SMB8J15CAHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J15CAHM3_A/I Tags
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ESD9B5.0ST5G
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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