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Vishay General Semiconductor - Diodes Division SMB8J15CAHM3_B/I
- Part No.:
- SMB8J15CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J15CAHM3_B/I.pdf
- Description:
- 800W,15V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:8,455
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Product details
Overview
SMB8J15CAHM3_B/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 clamping voltage (VC) at 32.8 A peak pulse current (IPPM), and 800 W peak pulse power (PPPM) with 10/1000 µs waveform - suitable for automotive sensor interface protection per AEC-Q101.
For engineers reviewing the SMB8J15CAHM3_B/I datasheet, SMB8J15CAHM3_B/I pinout, SMB8J15CAHM3_B/I application, or SMB8J15CAHM3_B/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low leakage (<1.0 µA at VWM), and compatibility with automated SMT assembly on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve fast response time (<1 ns) and low incremental surge resistance, enabling effective suppression of ESD, lightning-induced transients, and inductive switching spikes. Its bidirectional configuration protects both polarities without requiring polarity-aware layout.
The device operates across -55 °C to +150 °C junction temperature range and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Thermal resistance is 72 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), supporting reliable power dissipation in compact PCB footprints.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal line bias margin. |
| VBR min/max | 16.7 V / 18.5 V at 1.0 mA - breakdown voltage range ensures consistent turn-on threshold across production lots. |
| VC @ IPPM | 24.4 V at 32.8 A - clamping voltage limits downstream IC stress during 10/1000 µs surge events. |
| PPPM | 800 W - peak pulse power handling capacity under standardized transient waveform. |
| ID @ VWM | <1.0 µA - ultra-low reverse leakage preserves signal integrity and battery life in always-on circuits. |
| TJ max | +150 °C - enables use in under-hood automotive environments and industrial enclosures. |
| Package | SMB (DO-214AA) - surface-mount outline with 0.220" × 0.130" footprint, compatible with standard pick-and-place equipment. |
Pinout & Package
SMB8J15CAHM3_B/I is housed in an SMB (DO-214AA) package: a two-terminal, non-polarized surface-mount case with matte tin-plated leads solderable per J-STD-002. No marking denotes polarity for bidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts surge current in either direction when voltage exceeds VBR. |
| Case (body) | Thermal and mechanical interface | Plastic body provides UL 94 V-0 flammability rating; thermal path to PCB copper pads via soldered terminals. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units, ADAS sensors, and infotainment interfaces. |
| Glass passivated junction | Ensures stable VBR over lifetime and improved moisture resistance versus epoxy-passivated alternatives. |
| MSL Level 1 | Supports lead-free reflow up to 260 °C peak without preconditioning - eliminates floor-life handling constraints. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage exposure to protected ICs compared to higher-ratio TVS devices. |
| Halogen-free & RoHS-compliant | Meets environmental compliance requirements for global automotive and industrial OEM programs. |
Applications
| Automotive Sensor Interface | Industrial CAN Bus Protection |
|---|---|
Use Scenario: Protecting LIN/CAN transceiver I/O pins against load dump and ESD in vehicle door modules. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed directly at connector entry point. Use Value: Limits transient voltage to 24.4 V during 32.8 A surges, preventing damage to ISO 11898-compliant transceivers. |
Use Scenario: Guarding RS-485/CAN FD physical layer against induced surges in factory automation PLCs. IC Role / Device Role / Timing Role: Primary line-level surge suppressor on differential bus pairs. Use Value: Maintains <1.0 µA leakage at 15 V, preserving common-mode noise margin while clamping 800 W transients. |
| Consumer IoT Power Input | Medical Diagnostic Equipment Signal Lines |
Use Scenario: Safeguarding 12 V DC input rails of smart home hubs against AC adapter transients and hot-plug spikes. IC Role / Device Role / Timing Role: Secondary overvoltage protector downstream of primary fuse and filter. Use Value: Delivers 800 W pulse power handling in SMB footprint - avoids need for larger SMA or SMC packages. |
Use Scenario: Shielding analog front-end inputs of portable ultrasound or ECG units from ESD events during clinical handling. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on high-impedance sensor traces. Use Value: Clamps sub-100 ns ESD pulses to ≤24.4 V without distorting mV-level physiological signals. |
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_B/I | Same electrical specs; RoHS-compliant but not halogen-free; commercial grade only (no AEC-Q101). | Lacks automotive qualification; unsuitable for under-hood or safety-critical systems. | Select when cost sensitivity outweighs AEC-Q101 requirement and halogen-free material is not mandated. |
| SMAJ15CA-M3 | Same VWM/VC/IPPM ratings but in smaller SMA (DO-214AC) package; RθJA = 85 °C/W (vs. 72 °C/W). | Lower thermal performance limits sustained surge duty cycle; less robust in high-temperature enclosures. | Choose only if board space is constrained and thermal derating can be accommodated via enhanced copper pour. |
Compared with SMB8J15CAHE3_B/I and SMAJ15CA-M3, SMB8J15CAHM3_B/I uniquely combines AEC-Q101 qualification, halogen-free construction, and superior thermal resistance - making it the preferred choice for automotive-grade designs where reliability and regulatory compliance are mandatory.
Availability
SMB8J15CAHM3_B/I is available at Aetrix Electronics and suitable for automotive sensor protection, industrial fieldbus interfaces, and medical diagnostic equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMB8J15CAHM3_B/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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and automotive-grade validation.
The SMB8JxxCA series targets high-reliability transient suppression in harsh environments, with design focus on AEC-Q101 compliance, low clamping ratio, and compatibility with modern SMT manufacturing flows.
FAQ
What is the clamping voltage of SMB8J15CAHM3_B/I at its rated peak pulse current?
The SMB8J15CAHM3_B/I has a maximum clamping voltage (VC) of 24.4 V when subjected to its rated peak pulse current (IPPM) of 32.8 A under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C and confirms the device's ability to limit transient overvoltage to a safe level for downstream circuitry. The SMB8J15CAHM3_B/I datasheet specifies this parameter in the bidirectional electrical characteristics table.
Is SMB8J15CAHM3_B/I suitable for automotive applications?
Yes, SMB8J15CAHM3_B/I is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials - meeting stringent automotive reliability and environmental standards. Its operating temperature range (-55 °C to +150 °C), MSL Level 1 rating, and glass-passivated junction make it appropriate for engine control, ADAS sensor, and body electronics applications. The SMB8J15CAHM3_B/I ordering code suffix "HM3" explicitly denotes this qualification.
How does the SMB8J15CAHM3_B/I differ from unidirectional variants like SMB10J15A?
SMB8J15CAHM3_B/I is bidirectional with symmetrical clamping behavior in both polarities, while SMB10J15A is unidirectional and conducts only in reverse bias. The SMB8J15CAHM3_B/I offers 800 W PPPM and 32.8 A IPPM, whereas SMB10J15A delivers 1000 W PPPM and 41.0 A IPPM. Additionally, SMB8J15CAHM3_B/I has lower VWM (15 V vs. 15 V) but identical VC (24.4 V), making it better suited for AC-coupled or polarity-agnostic protection scenarios.
What is the thermal resistance of SMB8J15CAHM3_B/I, and how does it affect layout?
SMB8J15CAHM3_B/I has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W and junction-to-lead resistance (RθJL) of 20 °C/W. These values assume mounting on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe TJ < 150 °C during repeated surges, designers must provide adequate copper area and avoid excessive trace length - the SMB8J15CAHM3_B/I thermal performance directly depends on PCB heat spreading capability.
Does SMB8J15CAHM3_B/I require polarity-aware PCB placement?
No, SMB8J15CAHM3_B/I is a bidirectional TVS diode with no cathode marking or polarity designation - both terminals are functionally identical. This eliminates orientation errors during automated assembly and simplifies layout for differential or AC signal lines. Unlike unidirectional parts such as SMB10J15A, the SMB8J15CAHM3_B/I does not rely on a color band or asymmetric marking, and its electrical symmetry is confirmed in the bidirectional electrical characteristics table.
SMB8J15CAHM3_B/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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 15V
- 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_B/I FAQ
1.How can I place an order for SMB8J15CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J15CAHM3_B/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_B/I reliable?
The price and inventory of SMB8J15CAHM3_B/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_B/I is usually 5 days.
3.What payment methods are accepted for SMB8J15CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J15CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J15CAHM3_B/I?
SMB8J15CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J15CAHM3_B/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_B/I?
For technical support, including SMB8J15CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J15CAHM3_B/I requirements.
6.How does Aetrix verify that SMB8J15CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMB8J15CAHM3_B/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_B/I meets industry standards.
7.What is the process for return or replacement of SMB8J15CAHM3_B/I?
All SMB8J15CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J15CAHM3_B/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_B/I part is unused and in its original packaging.
Return procedure for SMB8J15CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J15CAHM3_B/I Tags
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