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Vishay General Semiconductor - Diodes Division SMB8J30CAHE3_B/H
- Part No.:
- SMB8J30CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB8J30CAHE3_B/H.pdf
- Description:
- 800W,30V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:3,547
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Product details
Overview
SMB8J30CAHE3_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 standoff voltage (VWM), 48.4 V 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 SMB8J30CAHE3_B/H datasheet, SMB8J30CAHE3_B/H pinout, SMB8J30CAHE3_B/H application, or SMB8J30CAHE3_B/H equivalent, key selection criteria include AEC-Q101 qualification, bidirectional clamping behavior, low thermal resistance (RθJL = 20 °C/W), and compatibility with automated SMT assembly on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode 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 characteristics and low leakage (<1.0 µA at VWM), while the bidirectional symmetry enables symmetric clamping on AC-coupled or differential lines without polarity constraints.
The device is rated for -55 °C to +150 °C operating junction temperature and meets MSL Level 1 per J-STD-020 (260 °C peak reflow). Its 72 °C/W junction-to-ambient thermal resistance requires careful PCB pad design - minimum 0.2" × 0.2" copper per terminal - to sustain repetitive surge duty cycles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse operating voltage before clamping initiates; defines safe signal swing range for protected line. |
| VBR min/max | 33.3 V / 36.8 V at 1.0 mA test current - guaranteed breakdown threshold window ensuring consistent turn-on across production lots. |
| VC @ IPPM | 48.4 V at 16.5 A - clamping voltage under 10/1000 µs surge; determines maximum stress imposed on downstream ICs during transient events. |
| PPPM | 800 W - peak pulse power handling capability; defines energy absorption limit for single transient events per JEDEC standard. |
| ID @ VWM | <1.0 µA - reverse leakage at standoff voltage; critical for low-power sensor biasing and battery-operated systems. |
| TJ max | +150 °C - maximum junction temperature; supports under-hood automotive deployment and high-ambient industrial environments. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional - no polarity marking; symmetrical two-terminal construction with matte tin-plated leads solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Both terminals function identically; bidirectional clamping allows placement without orientation check on PCB. |
| Case (body) | Thermal and mechanical interface | Plastic molding meets UL 94 V-0; thermal path relies on copper pad area (min. 0.2" × 0.2") for RθJL = 20 °C/W performance. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control modules and ADAS sensor interfaces requiring long-term field reliability. |
| Low clamping ratio (VC/VBR ≈ 1.45) | Minimizes overvoltage stress on protected ICs - e.g., 48.4 V clamp limits exposure of 3.3 V or 5 V logic to <15× rated voltage during surge. |
| MSL Level 1 rating | Enables direct placement into high-temperature reflow profiles (260 °C peak) without pre-baking, reducing manufacturing complexity. |
| Glass-passivated junction | Ensures stable VBR over time and temperature, with <1.0 µA leakage at VWM - critical for precision analog front-ends and low-power wake-up circuits. |
| 800 W peak pulse power | Supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge immunity when properly mounted, meeting industrial and automotive EMC requirements. |
Applications
| Automotive Sensor Interface | Industrial Digital I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load-dump and jump-start transients in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly at connector entry point to divert surge energy before reaching signal conditioning circuitry. Use Value: AEC-Q101 qualification and 150 °C TJ max ensure uninterrupted operation in under-hood environments; 48.4 V VC prevents damage to 3.3 V/5 V transceiver inputs. |
Use Scenario: Safeguarding PLC digital input channels against inductive kickback from solenoids, relays, and motor drivers in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional clamping element on 24 V DC input lines, absorbing repetitive 10/1000 µs surges up to 800 W without degradation. Use Value: Low leakage (<1.0 µA) avoids false triggering of optocoupler-based inputs; SMB package enables dense layout in space-constrained DIN-rail modules. |
| Telecom Line Interface | Consumer USB/Display Port ESD Protection |
Use Scenario: Secondary surge protection on Ethernet PHY or RS-485 transceiver lines exposed to lightning-induced surges in outdoor telecom cabinets. IC Role / Device Role / Timing Role: Coordinated clamping stage downstream of gas discharge tube (GDT), limiting let-through voltage to safe levels for silicon transceivers. Use Value: 800 W PPPM handles high-energy threats; bidirectional symmetry matches differential signaling standards like RS-485 without polarity concerns. |
Use Scenario: Board-level ESD and surge protection for USB 2.0 data lines and DisplayPort auxiliary channels in laptops and docking stations. IC Role / Device Role / Timing Role: Fast-response shunt device placed adjacent to connector to clamp ±8 kV contact ESD (IEC 61000-4-2) before signal integrity is compromised. Use Value: Sub-nanosecond response and low capacitance (typ. 100 pF at 0 V) preserve signal rise/fall times; RoHS-compliant HE3 suffix meets consumer regulatory requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CAHE3_A/H | Same VWM (30 V), but lower PPPM (600 W) and higher VC (53.3 V at 12.3 A); unidirectional variant not applicable. | Lower energy handling limits use to less severe surge environments (e.g., IEC 61000-4-5 Level 2). | Select SMBJ30CAHE3_A/H only if system-level testing confirms 600 W suffices and board layout cannot accommodate SMB8J's higher surge margin. |
| SMCJ30CAHE3_A/H | Same VWM and bidirectionality, but larger SMC (DO-214AB) package; higher PPPM (1500 W) and lower VC (48.4 V at 31.0 A). | Requires larger PCB footprint and higher thermal mass; suited for primary protection stages or higher-power industrial drives. | Choose SMCJ30CAHE3_A/H when protecting 48 V systems or where 1500 W surge capacity is mandated - not a drop-in replacement due to package size mismatch. |
Compared with SMBJ30CAHE3_A/H, SMB8J30CAHE3_B/H delivers 33 % higher surge power and tighter clamping; versus SMCJ30CAHE3_A/H, it offers identical clamping voltage but in a 30 % smaller footprint - enabling compact designs where space and moderate surge levels coexist.
Availability
SMB8J30CAHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial digital I/O protection, telecom line interfaces, and consumer USB/display port ESD protection requiring stable component supply and AEC-Q101 compliance.
Supply support for SMB8J30CAHE3_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.
The SMB8J series is part of Vishay's TRANSZORB® TVS portfolio, engineered for high-power-density transient suppression in automotive, industrial, and communications systems where compact size and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMB8J30CAHE3_B/H and how is it measured?
The SMB8J30CAHE3_B/H has a maximum clamping voltage (VC) of 48.4 V, measured at a peak pulse current (IPPM) of 16.5 A using a standardized 10/1000 µs double-exponential surge waveform. This value is guaranteed across temperature and production lot, and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMB8J30CAHE3_B/H suitable for automotive applications?
Yes, SMB8J30CAHE3_B/H is AEC-Q101 qualified and explicitly designated for automotive use with the "HE3" suffix. It supports operating junction temperatures up to +150 °C and has passed stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD - making it appropriate for engine control units, body electronics, and ADAS sensor modules where reliability under harsh conditions is required.
What does the "_B/H" suffix mean in SMB8J30CAHE3_B/H?
The "_B/H" suffix in SMB8J30CAHE3_B/H indicates packaging configuration: "B" denotes tape-and-reel format per Vishay's internal revision coding, and "H" specifies the preferred package code for 7" diameter reels containing 750 units. This ordering code aligns with Vishay's standard delivery mode for SMT assembly and ensures traceability and compatibility with pick-and-place equipment.
How does SMB8J30CAHE3_B/H differ from unidirectional TVS diodes like SMB10J30AHE3_B/H?
SMB8J30CAHE3_B/H is bidirectional, providing symmetrical clamping for AC signals or differential buses (e.g., RS-485, CAN), whereas SMB10J30AHE3_B/H is unidirectional and requires correct cathode orientation. The bidirectional SMB8J30CAHE3_B/H has lower peak pulse power (800 W vs. 1000 W) and higher leakage tolerance (1.0 µA vs. 5.0 µA), but eliminates polarity-check steps during assembly and supports floating-line protection schemes.
What PCB layout guidelines apply to SMB8J30CAHE3_B/H for optimal thermal performance?
For optimal thermal performance, SMB8J30CAHE3_B/H must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in Vishay's datasheet Figure 2 derating curves. This pad area achieves the stated RθJL of 20 °C/W; smaller pads increase junction temperature under surge, risking parametric shift or failure. Thermal vias under pads are recommended for high-duty-cycle applications.
SMB8J30CAHE3_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)
SMB8J30CAHE3_B/H FAQ
1.How can I place an order for SMB8J30CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB8J30CAHE3_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 SMB8J30CAHE3_B/H reliable?
The price and inventory of SMB8J30CAHE3_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 SMB8J30CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMB8J30CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB8J30CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB8J30CAHE3_B/H?
SMB8J30CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB8J30CAHE3_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 SMB8J30CAHE3_B/H?
For technical support, including SMB8J30CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB8J30CAHE3_B/H requirements.
6.How does Aetrix verify that SMB8J30CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMB8J30CAHE3_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 SMB8J30CAHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMB8J30CAHE3_B/H?
All SMB8J30CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB8J30CAHE3_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 SMB8J30CAHE3_B/H part is unused and in its original packaging.
Return procedure for SMB8J30CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB8J30CAHE3_B/H Tags
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