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Vishay General Semiconductor - Diodes Division SMB8J30CAHM3/I
- Part No.:
- SMB8J30CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J30CAHM3/I.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,764
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Product details
Overview
SMB8J30CAHM3/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 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/I datasheet, SMB8J30CAHM3/I pinout, SMB8J30CAHM3/I application, or SMB8J30CAHM3/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance, and compatibility with automated SMT assembly on 0.2" × 0.2" copper pads.
Technical Context
This device operates as a voltage-clamped shunt protector, responding within picoseconds to transients induced by inductive switching or ESD events. Its glass-passivated junction ensures stable breakdown behavior and low incremental surge resistance, while the bidirectional configuration enables symmetrical clamping across both polarities without external polarity management.
Rated for -55 °C to +150 °C operation and qualified to AEC-Q101, SMB8J30CAHM3/I supports automotive-grade reliability requirements. Thermal resistance is characterized at RθJA = 72 °C/W (typ.) and RθJL = 20 °C/W (typ.), enabling thermal design validation when mounted per recommended 5.0 mm × 5.0 mm pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal line operating margin |
| VBR min/max | 33.3 V / 36.8 V at 1.0 mA - verified breakdown threshold range ensuring consistent turn-on under surge conditions |
| VC @ IPPM | 48.4 V at 16.5 A - clamping voltage during 10/1000 µs transient; limits downstream IC stress to safe levels |
| PPPM | 800 W - peak pulse power handling capacity; determines survivability against IEC 61000-4-5 Level 4 surges |
| ID @ VWM | 1.0 µA - ultra-low leakage at stand-off voltage; preserves signal integrity in high-impedance sensor circuits |
| TJ max | +150 °C - extended junction temperature rating supporting under-hood automotive placement |
| Package | SMB (DO-214AA) - industry-standard surface-mount outline with 2.20 mm height and 5.59 mm length; compatible with J-STD-020 MSL level 1 reflow |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance. Polarity marking: none (bidirectional device).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping occurs regardless of voltage polarity applied |
| Case (exposed cathode metal strip) | Thermal and mechanical anchor | Provides primary heat dissipation path to PCB copper; 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 modules and ADAS sensor interfaces |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets EU Directive 2011/65/EU and IPC-1752A material declaration requirements |
| Low-profile SMB package | Height ≤ 2.20 mm enables use in space-constrained modules such as camera ECUs and battery management systems |
| Fast response time | Sub-nanosecond clamping onset ensures protection of sub-10 ns digital logic and high-speed CAN/FlexRay lines |
| MSL level 1 rating | Supports single-reflow assembly at peak 260 °C without moisture-induced damage |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LIN bus and analog sensor inputs (e.g., pressure, temperature) in engine control units from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional shunt clamp absorbing up to 800 W transient energy while holding line voltage ≤ 48.4 V. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V microcontrollers and ADC front-ends during vehicle cranking or alternator regulation faults. | Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to relay coil flyback and EFT bursts. IC Role / Device Role / Timing Role: Fast-acting voltage limiter placed directly at connector entry point to divert surge current before reaching isolation barrier. Use Value: Enables >100,000 actuation cycles without degradation, meeting IEC 61000-4-4 Level 4 immunity requirements. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Shielding RS-485 transceivers in base station backhaul equipment from lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Primary protection stage clamping differential-mode transients between A/B lines with matched bidirectional symmetry. Use Value: Maintains signal fidelity below 10 pF junction capacitance at zero bias, preserving data rates up to 20 Mbps. | Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Low-leakage (1.0 µA) TVS placed across motor terminals to quench inductive kick without loading control circuitry. Use Value: Eliminates need for snubber RC networks, reducing BOM count and board area while sustaining 100 A non-repetitive forward surge capability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB8J30CAHE3/I | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification | Preferred for commercial-automotive hybrids where halogen content is unrestricted | Select when cost sensitivity outweighs halogen-free requirement and supply chain allows dual sourcing |
| SMAJ30CA | Lower PPPM (400 W), larger SMA package (DO-214AC), higher RθJA (90 °C/W) | Suitable for lower-energy environments like consumer USB ports or low-power sensors | Choose only if board space permits larger footprint and thermal budget accommodates reduced power handling |
Compared with SMB8J30CAHE3/I, SMB8J30CAHM3/I adds halogen-free compliance without sacrificing performance; versus SMAJ30CA, it delivers double the surge power in a smaller, thermally superior package - critical for high-density automotive modules.
Availability
SMB8J30CAHM3/I is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line interface designs requiring stable component supply, AEC-Q101 assurance, and halogen-free compliance.
Supply support for SMB8J30CAHM3/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 and application-specific optimization.
The SMB8JxxCA series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB8J30CAHM3/I at its rated peak pulse current?
The SMB8J30CAHM3/I has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current (IPPM) of 16.5 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream components experience no more than 48.4 V during surge events - a critical parameter for protecting 3.3 V or 5 V logic interfaces. The SMB8J30CAHM3/I maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMB8J30CAHM3/I suitable for automotive applications?
Yes, SMB8J30CAHM3/I is AEC-Q101 qualified and carries the HM3 suffix indicating halogen-free, RoHS-compliant construction - making it approved for automotive use in engine control units, body electronics, and ADAS sensor modules. Its thermal resistance (RθJA = 72 °C/W), wide operating temperature range (-55 °C to +150 °C), and robust 800 W surge rating meet stringent automotive reliability requirements. The SMB8J30CAHM3/I is explicitly listed in Vishay's AEC-Q101 qualified product matrix with full test report traceability.
How does the bidirectional configuration of SMB8J30CAHM3/I affect circuit design?
The bidirectional configuration of SMB8J30CAHM3/I eliminates the need for polarity-aware placement or additional series components - both terminals behave identically, providing symmetrical clamping for positive and negative transients. This simplifies layout on differential buses (e.g., RS-485, CAN) and AC-coupled signal paths, reduces BOM count, and avoids risk of incorrect orientation during automated assembly. Unlike unidirectional TVS diodes, SMB8J30CAHM3/I requires no anode/cathode alignment check, and its zero-bias junction capacitance remains stable at ≤10 pF, preserving high-frequency signal integrity.
What is the meaning of the "HM3/I" suffix in SMB8J30CAHM3/I?
The "HM3" suffix in SMB8J30CAHM3/I denotes halogen-free, RoHS-compliant construction per IPC-1752A, while "I" specifies packaging in 13-inch diameter plastic tape and reel (3200 units per reel). This ordering code aligns with Vishay's standardized nomenclature: HM3 confirms compliance with JEDEC JS709E halogen limits (<900 ppm Cl, <900 ppm Br, <1500 ppm total halogens), and "/I" indicates the delivery format optimized for high-volume SMT production. The SMB8J30CAHM3/I is fully interchangeable with other HM3-suffix variants in form, fit, and function.
Can SMB8J30CAHM3/I replace SMBJ30CA in an existing design?
SMB8J30CAHM3/I is not a direct replacement for SMBJ30CA due to differing peak pulse power ratings: SMB8J30CAHM3/I delivers 800 W (bidirectional), whereas SMBJ30CA offers 600 W (bidirectional). While both share the same VWM (30 V), VC (48.4 V), and SMB package, the higher PPPM of SMB8J30CAHM3/I provides greater surge margin - but may require verification of thermal dissipation in constrained layouts. The SMB8J30CAHM3/I also carries AEC-Q101 qualification and HM3 halogen-free status, which SMBJ30CA lacks. Use SMB8J30CAHM3/I only after validating system-level immunity and thermal performance.
SMB8J30CAHM3/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:
- Discontinued at Digi-Key
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- 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/I FAQ
1.How can I place an order for SMB8J30CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J30CAHM3/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 SMB8J30CAHM3/I reliable?
The price and inventory of SMB8J30CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB8J30CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMB8J30CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J30CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J30CAHM3/I?
SMB8J30CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J30CAHM3/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 SMB8J30CAHM3/I?
For technical support, including SMB8J30CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J30CAHM3/I requirements.
6.How does Aetrix verify that SMB8J30CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMB8J30CAHM3/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 SMB8J30CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMB8J30CAHM3/I?
All SMB8J30CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J30CAHM3/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 SMB8J30CAHM3/I part is unused and in its original packaging.
Return procedure for SMB8J30CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J30CAHM3/I Tags
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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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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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