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Vishay General Semiconductor - Diodes Division SMB8J30CAHM3_B/H
- Part No.:
- SMB8J30CAHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J30CAHM3_B/H.pdf
- Description:
- 800W,30V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,711
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Product details
Overview
SMB8J30CAHM3_B/H 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 30 V stand-off voltage (VWM), 48.4 V maximum clamping voltage (VC) at 16.5 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 SMB8J30CAHM3_B/H datasheet, SMB8J30CAHM3_B/H pinout, SMB8J30CAHM3_B/H application, or SMB8J30CAHM3_B/H equivalent, key selection criteria include AEC-Q101 qualification, bidirectional clamping symmetry, low thermal resistance (RθJL = 20 °C/W), and compatibility with automated SMT assembly on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode uses a glass-passivated silicon junction to achieve sub-nanosecond response time and low incremental surge resistance. Its bidirectional architecture provides symmetrical clamping for AC-coupled or floating lines without polarity constraints, meeting ANSI/IEEE C62.35 standards for transient suppression.
Rated for -55 °C to +150 °C operating junction temperature and qualified per AEC-Q101, SMB8J30CAHM3_B/H supports automotive-grade reliability under repetitive surge stress. The halogen-free, RoHS-compliant HM3 suffix confirms compliance with JESD201 Class 2 whisker resistance and MSL Level 1 reflow profile (260 °C peak).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin for 24 V nominal systems. |
| VBR min/max | 33.3 V / 36.8 V at 1.0 mA - Breakdown voltage range ensures consistent turn-on across production lots and temperature. |
| VC @ IPPM | 48.4 V at 16.5 A - Clamping voltage limits downstream IC stress during 10/1000 µs transients (e.g., ISO 7637-2 Pulse 1/2a/5a). |
| PPPM | 800 W - Peak pulse power rating enables robust protection against high-energy surges without thermal runaway. |
| ID @ VWM | 1.0 µA - Ultra-low leakage preserves signal integrity and battery life in always-on sensor circuits. |
| RθJL | 20 °C/W - Low junction-to-lead thermal resistance allows efficient heat dissipation into PCB copper, supporting sustained surge duty cycles. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional device with no polarity marking - both terminals are electrically symmetric.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient current path | Either terminal conducts during positive or negative overvoltage events; no cathode band marking required for bidirectional operation. |
| Case (cathode side in unidirectional variants) | Thermal and mechanical interface | Exposed metal slug connects directly to PCB copper pad for thermal conduction; requires minimum 5.0 mm × 5.0 mm pad per terminal per datasheet fig. 2. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and body electronics under extended temperature and lifetime stress testing. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets automotive environmental requirements and JESD201 Class 2 whisker resistance for long-term solder joint reliability. |
| Low RθJL = 20 °C/W | Enables higher surge repetition rates without exceeding 150 °C junction limit when mounted on recommended copper area. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without moisture sensitivity concerns - no baking required prior to assembly. |
| 800 W PPPM (10/1000 µs) | Provides protection margin against severe load-dump and inductive switching transients common in 24 V vehicle architectures. |
Applications
| Automotive Sensor Interface | Industrial PLC Analog Input |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog front-ends of wheel speed or pressure sensors from ESD and load dump. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between signal line and ground, absorbing transients before they reach the protected IC. Use Value: Maintains signal fidelity under ISO 10605 ESD (±30 kV air/±25 kV contact) and ISO 7637-2 Pulse 5a (75 V/300 ms), enabled by 48.4 V VC and 1.0 µA ID. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers exposed to field wiring surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp across input terminals, shunting surge energy away from precision op-amps and ADCs. Use Value: Prevents latch-up or damage during 1 kV ring wave (IEC 61000-4-5) events due to 800 W PPPM rating and symmetrical bidirectional response. |
| Telecom Line Card Protection | Consumer Appliance Motor Control |
Use Scenario: Shielding Ethernet PHYs and PoE injectors from lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Secondary-level TVS placed after gas discharge tube (GDT) or polymer PTC, providing fast clamping for residual transients. Use Value: Sub-ns response time and 30 V VWM ensure minimal overshoot during combined GDT-TVSS hybrid protection schemes. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in washing machines and HVAC blowers. IC Role / Device Role / Timing Role: Across-motor terminals or between H-bridge outputs and ground to clamp inductive kickback. Use Value: Withstands 100 A IFSM (unidirectional reference) and 16.5 A IPPM, enabling reliable operation in high-surge home appliance environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J30CAHE3_B/H | Same electrical specs and SMB package, but RoHS-compliant commercial-grade (non-AEC-Q101) with matte tin plating. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select SMB8J30CAHE3_B/H when cost optimization is prioritized and automotive reliability validation is unnecessary. |
| SMAJ30CA | Lower PPPM (400 W), larger SMA (DO-214AC) package, same VWM/VC specs; not AEC-Q101 qualified. | Reduced surge handling capacity and less thermal mass; limited to lower-energy transients in space-constrained layouts. | Choose SMAJ30CA only if board real estate is critical and surge threat level is below ISO 7637-2 Pulse 1 (50 V/400 ms). |
Compared with SMB8J30CAHE3_B/H, SMB8J30CAHM3_B/H adds halogen-free construction and AEC-Q101 validation without sacrificing clamping performance; versus SMAJ30CA, it delivers double the surge power rating and superior thermal management in the same footprint class.
Availability
SMB8J30CAHM3_B/H is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom line protection requiring stable component supply with full traceability and lifecycle support.
Supply support for SMB8J30CAHM3_B/H 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 application-specific performance.
SMB8J30CAHM3_B/H belongs to Vishay's TRANSZORB® family of high-power-density TVS diodes engineered for automotive-grade transient immunity in harsh electromagnetic environments.
FAQ
What is the clamping voltage of SMB8J30CAHM3_B/H at its rated peak pulse current?
The SMB8J30CAHM3_B/H has a maximum clamping voltage (VC) of 48.4 V at 16.5 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream ICs in automotive and industrial systems.
Is SMB8J30CAHM3_B/H suitable for automotive applications?
Yes, SMB8J30CAHM3_B/H is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction with JESD201 Class 2 whisker resistance. It is explicitly rated for -55 °C to +150 °C operation and validated for automotive use in sensor interfaces and body electronics.
What does the "HM3" suffix mean in SMB8J30CAHM3_B/H?
The "HM3" suffix denotes halogen-free, RoHS-compliant construction with matte tin-plated leads that meet JESD201 Class 2 whisker resistance and J-STD-002 solderability standards. It also signifies compliance with MSL Level 1 reflow (260 °C peak) and automotive qualification per AEC-Q101.
How does SMB8J30CAHM3_B/H differ from unidirectional variants like SMB10J30A?
SMB8J30CAHM3_B/H is bidirectional with symmetrical clamping for AC or floating lines, while SMB10J30A is unidirectional with cathode marking and higher PPPM (1000 W). SMB8J30CAHM3_B/H offers 800 W PPPM and is optimized for automotive signal-line protection where polarity independence is required.
What PCB layout guidance applies to SMB8J30CAHM3_B/H for optimal thermal performance?
Per Vishay datasheet 88422, SMB8J30CAHM3_B/H must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to achieve specified RθJL = 20 °C/W and sustain 800 W surge ratings. Thermal vias under the pad are recommended for high-duty-cycle applications.
SMB8J30CAHM3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 30V
- Current - Peak Pulse (10/1000µs):
- 16.5A
- 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)
SMB8J30CAHM3_B/H FAQ
1.How can I place an order for SMB8J30CAHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J30CAHM3_B/H 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 SMB8J30CAHM3_B/H reliable?
The price and inventory of SMB8J30CAHM3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J30CAHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMB8J30CAHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J30CAHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J30CAHM3_B/H?
SMB8J30CAHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J30CAHM3_B/H 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 SMB8J30CAHM3_B/H?
For technical support, including SMB8J30CAHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J30CAHM3_B/H requirements.
6.How does Aetrix verify that SMB8J30CAHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMB8J30CAHM3_B/H 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 SMB8J30CAHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMB8J30CAHM3_B/H?
All SMB8J30CAHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J30CAHM3_B/H, 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 SMB8J30CAHM3_B/H part is unused and in its original packaging.
Return procedure for SMB8J30CAHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J30CAHM3_B/H Tags
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