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Vishay General Semiconductor - Diodes Division SMBJ30CAHM3/I
- Part No.:
- SMBJ30CAHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30CAHM3/I.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,211
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Product details
Overview
SMBJ30CAHM3/I from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on signal or power lines. It features a 30 V standoff voltage (VWM), 48.4 V maximum clamping voltage (VC) at 12.4 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), used to protect MOSFETs, ICs, and sensor interfaces in industrial motor drives.
For engineers reviewing the SMBJ30CAHM3/I datasheet, SMBJ30CAHM3/I pinout, SMBJ30CAHM3/I application, or SMBJ30CAHM3/I equivalent, this part delivers verified bidirectional surge suppression with halogen-free RoHS compliance, AEC-Q101 qualification readiness, and MSL Level 1 moisture sensitivity - critical for automotive-grade board-level ESD and load-switching transient protection.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) specified between 33.3 V and 36.8 V at 1.0 mA test current. Its low clamping ratio (VC/VBR ≈ 1.35–1.45) ensures tight overvoltage control during 10/1000 µs surges up to 12.4 A, while maintaining <1 µA reverse leakage at 30 V.
Thermal performance is defined by RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), enabling reliable operation up to +150 °C junction temperature. The device uses glass-passivated silicon junction construction and matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before significant conduction begins; sets system-level DC bias margin. |
| VBR (min/max) | 33.3 V / 36.8 V at 1.0 mA - Confirmed bidirectional breakdown range; defines minimum trigger threshold under surge conditions. |
| VC @ IPPM | 48.4 V at 12.4 A - Clamped voltage during 600 W transient; determines protected circuit's maximum stress exposure. |
| PPPM | 600 W (10/1000 µs) - Peak surge power handling capability; validates suitability for IEC 61000-4-5 Level 3/4 line transients. |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive or high-ambient industrial enclosures. |
| Package | SMB (DO-214AA) - Standardized 2-pin SMD outline (5.21 mm × 4.06 mm × 2.20 mm); compatible with automated pick-and-place and reflow. |
| Compliance | AEC-Q101 qualified (HM3 suffix), halogen-free, RoHS-compliant, MSL Level 1 - Enables use in automotive ECUs and long-lifecycle industrial designs. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Two-terminal device: terminals are symmetrical and interchangeable; neither anode nor cathode is designated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Surge Input/Output Node | Connected to protected line (e.g., CAN_H, RS-485 A, or DC bus); conducts bidirectionally during overvoltage events. |
| Terminal 2 | Surge Input/Output Node | Connected to reference plane (e.g., ground or complementary line); completes symmetrical clamping path with Terminal 1. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential lines (e.g., RS-485, CAN, USB D+/D−) without polarity concerns. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 combination wave surges (e.g., 2 Ω source impedance, 40 A) without degradation when mounted per recommended pad layout. |
| Low clamping voltage (48.4 V) | Keeps downstream 3.3 V/5 V logic or 40 V-rated MOSFETs within safe operating area during 12.4 A transients. |
| Halogen-free & AEC-Q101 ready (HM3) | Meets automotive supply chain requirements for material content and reliability; supports PPAP documentation for Tier-1 suppliers. |
| MSL Level 1, 260 °C reflow | Allows standard lead-free reflow profiles without baking or special handling; reduces manufacturing complexity and cost. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and current-sense amplifiers against inductive kickback from brushed DC motors. IC Role / Device Role / Timing Role: Bidirectional TVS placed across H-bridge half-bridge outputs and sense resistor nodes. Use Value: Limits transient voltage to ≤48.4 V, preventing latch-up or oxide rupture in 40 V MOSFETs and rail-to-rail op-amps. |
Use Scenario: Surge suppression on LIN bus lines exposed to battery dump energy and load-dump coupling. IC Role / Device Role / Timing Role: Line-to-ground TVS on LIN transceiver pins (e.g., TJA1020), operating in bidirectional mode. Use Value: Maintains signal integrity below LIN physical layer limits (≤40 V) during ISO 7637-2 Pulse 1/2/5a events. |
| Telecom Power Feeds | Consumer Sensor Interfaces |
|
Use Scenario: Input-stage protection of PoE-powered devices against Ethernet cable-induced surges. IC Role / Device Role / Timing Role: Bidirectional clamp on 48 V DC feed lines prior to DC-DC converter input. Use Value: Absorbs 600 W transients without forward conduction, preserving upstream fuse coordination and converter enable timing. |
Use Scenario: ESD hardening of I²C lines connecting environmental sensors (e.g., BME280) to microcontrollers. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) TVS across SDA/SCL, referenced to local ground. Use Value: Prevents data corruption during ±8 kV contact discharge (IEC 61000-4-2) while adding <0.1 ns propagation delay. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CA-E3/52 | Same electrical specs, RoHS-compliant but not halogen-free; commercial grade only (no AEC-Q101 qualification). | Limited to non-automotive industrial or consumer use where halogen-free and automotive qualification are not required. | Select when cost sensitivity outweighs material compliance or automotive qualification needs. |
| SAC30CA | Same VWM/VC, but SOD-123FL package (smaller footprint, lower IPPM = 9.5 A, PPPM = 400 W). | Suitable for space-constrained PCBs with lower-energy transients (e.g., USB ports, button inputs), not for 600 W line surges. | Choose only for compact layouts accepting reduced surge margin; verify thermal derating at elevated ambient. |
Compared with SMBJ30CA-E3/52, SMBJ30CAHM3/I adds halogen-free construction and AEC-Q101 readiness without sacrificing clamping performance; versus SAC30CA, it delivers 50 % higher surge power handling and proven robustness on 5.0 mm × 5.0 mm copper pads.
Availability
SMBJ30CAHM3/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and consumer sensor interfaces requiring stable component supply, long-term lifecycle support, and automotive-grade material compliance.
Supply support for SMBJ30CAHM3/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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where robustness against inductive switching and lightning-induced surges is mandatory.
FAQ
What is the standoff voltage rating of SMBJ30CAHM3/I?
The SMBJ30CAHM3/I has a maximum reverse standoff voltage (VWM) of 30 V, meaning it remains in high-impedance state below this DC or RMS voltage level. This value is confirmed in the Vishay SMBJ5.0A–SMBJ188A datasheet (Document Number: 88392, Rev. 09-Jan-2024) and defines the upper limit of normal operating voltage before clamping initiates. The SMBJ30CAHM3/I maintains <1 µA leakage at this voltage, ensuring minimal power loss in standby.
Is SMBJ30CAHM3/I suitable for automotive applications?
Yes - the HM3 suffix indicates halogen-free, RoHS-compliant construction and AEC-Q101 qualification readiness. While final AEC-Q101 certification applies to the HM3 variant family, the SMBJ30CAHM3/I meets all required stress tests (HTOL, TC, UHAST, etc.) per AEC-Q101 when processed per Vishay's qualified flow. It is widely deployed in automotive body control modules and infotainment power supplies where SMBJ30CAHM3/I provides validated surge immunity.
What is the clamping voltage of SMBJ30CAHM3/I at its rated surge current?
The SMBJ30CAHM3/I clamps to a maximum of 48.4 V when subjected to its peak pulse current (IPPM) of 12.4 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and published in Table 1 of the Vishay datasheet. The low clamping ratio (VC/VBR ≈ 1.35–1.45) ensures protected circuits remain within safe operating limits during fast transients - a key design parameter for selecting SMBJ30CAHM3/I in 3.3 V/5 V system protection.
Does SMBJ30CAHM3/I have polarity markings on the package?
No - SMBJ30CAHM3/I is a bidirectional TVS diode and carries no polarity marking (e.g., cathode band) on the SMB (DO-214AA) case. Its symmetrical construction allows installation in either orientation across a protected line and reference plane. This eliminates orientation errors during automated assembly and simplifies layout for differential or AC-coupled signals, distinguishing SMBJ30CAHM3/I from unidirectional variants like SMBJ30A.
What is the thermal resistance of SMBJ30CAHM3/I from junction to ambient?
The typical junction-to-ambient thermal resistance (RθJA) of SMBJ30CAHM3/I is 100 °C/W when mounted on the minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay datasheet. This value enables accurate junction temperature estimation under power dissipation - for example, at 5.0 W steady-state power (PD), ΔT = 500 °C, confirming SMBJ30CAHM3/I must be used only for transient (not continuous) power dissipation.
SMBJ30CAHM3/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):
- 12.4A
- Power - Peak Pulse:
- 600W
- 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)
SMBJ30CAHM3/I FAQ
1.How can I place an order for SMBJ30CAHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30CAHM3/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 SMBJ30CAHM3/I reliable?
The price and inventory of SMBJ30CAHM3/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ30CAHM3/I is usually 5 days.
3.What payment methods are accepted for SMBJ30CAHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30CAHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30CAHM3/I?
SMBJ30CAHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30CAHM3/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 SMBJ30CAHM3/I?
For technical support, including SMBJ30CAHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30CAHM3/I requirements.
6.How does Aetrix verify that SMBJ30CAHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ30CAHM3/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 SMBJ30CAHM3/I meets industry standards.
7.What is the process for return or replacement of SMBJ30CAHM3/I?
All SMBJ30CAHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30CAHM3/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 SMBJ30CAHM3/I part is unused and in its original packaging.
Return procedure for SMBJ30CAHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30CAHM3/I Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
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Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
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ESD5Z5.0T1G
onsemi
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DESD5V0U1BB-7
Diodes Incorporated
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D12V0L1B2LP-7B
Diodes Incorporated
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PESD2V0Y1BSFYL
Nexperia USA Inc.
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DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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