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Vishay General Semiconductor - Diodes Division SMBJ150CAHM3_B/I
- Part No.:
- SMBJ150CAHM3_B/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ150CAHM3_B/I.pdf
- Description:
- 600W,150V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,483
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Product details
Overview
SMBJ150CAHM3_B/I from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 150 V standoff voltage (VWM), 167–185 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), <2.5 A maximum reverse leakage at VWM, and clamps to ≤243 V at 2.5 A peak pulse current - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ150CAHM3_B/I datasheet, SMBJ150CAHM3_B/I pinout, SMBJ150CAHM3_B/I application, or SMBJ150CAHM3_B/I equivalent, this page delivers verified electrical specs, bidirectional clamping behavior, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, and halogen-free RoHS-compliant construction per JESD201 Class 2 whisker testing.
Technical Context
This device operates as a bidirectional avalanche diode with symmetrical clamping in both polarities, enabling protection of AC-coupled or floating signal paths without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance under repetitive 10/1000 µs transients.
Rated for -55 °C to +150 °C operating junction temperature, it leverages the SMB package's 20 °C/W junction-to-lead thermal resistance and meets MSL Level 1 (260 °C peak reflow), supporting high-reliability automated SMT assembly in automotive and industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 150 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR min/max | 167 V / 185 V at 1 mA - Confirmed bidirectional breakdown range; ensures predictable turn-on during overvoltage events. |
| IPPM | 2.5 A (10/1000 µs) - Peak surge current capability; determines clamping voltage (VC ≤ 243 V) under standardized lightning-surge stress. |
| PPPM | 600 W - Peak pulse power rating; supports robust transient immunity in IEC 61000-4-5 Level 3/4 surge tests. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or enclosed industrial enclosures. |
| Leakage ID | <2.5 µA at 150 V - Low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking; matte tin-plated leads compliant with J-STD-002 and JESD22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal 1 (cathode-band side) | One side of symmetrical avalanche junction; functions identically to cathode in bidirectional mode - no DC polarity dependency. |
| Cathode | Terminal 2 (opposite cathode-band side) | Other side of symmetrical junction; interchangeable with anode for AC or differential line protection applications. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or ungrounded power rails without polarity concerns. |
| 600 W peak pulse power (10/1000 µs) | Withstands IEC 61000-4-5 combination wave surges up to 1 kV/500 A in typical PCB layouts with minimal trace inductance. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics per stress test requirements including HTGB, HTRB, and TCT. |
| Halogen-free & RoHS-compliant | Meets JEDEC JS709E and IPC-1752A material declarations; supports sustainability compliance for global OEM programs. |
| MSL Level 1 (260 °C peak) | Allows single-reflow assembly without moisture sensitivity handling; eliminates bake-out requirement in standard SMT lines. |
Applications
| Industrial Sensor Interface Protection | Telecom Line Surge Suppression |
|---|---|
|
Use Scenario: Protecting 4–20 mA current-loop sensors and analog voltage inputs (e.g., 0–10 V) from ESD and inductive switching transients in factory automation PLCs. IC Role / Device Role / Timing Role: Standoff-mode TVS placed across input terminals to clamp fast-rising transients before they reach precision ADC front-ends or op-amp buffers. Use Value: Maintains signal accuracy by limiting clamped voltage to ≤243 V while drawing <2.5 µA leakage at 150 V - preserving measurement resolution and long-term calibration stability. |
Use Scenario: Safeguarding Ethernet PHY interfaces (10/100BASE-TX), POTS line cards, or DSL modems against lightning-induced surges on twisted-pair cabling. IC Role / Device Role / Timing Role: Bidirectional shunt protector on differential pairs, coordinated with common-mode chokes to divert common-mode energy without distorting data integrity. Use Value: Symmetrical clamping ensures equal protection on both conductors, preventing skew or DC offset shift during surge events - critical for maintaining bit-error-rate performance. |
| Automotive Body Control Module (BCM) | AC/DC Power Supply Input Stage |
|
Use Scenario: Transient suppression on LIN bus lines, door module switches, or lighting control outputs exposed to load-dump and jump-start conditions. IC Role / Device Role / Timing Role: Primary overvoltage clamp on low-speed serial buses and discrete I/O lines, operating alongside upstream fuses and downstream logic-level translators. Use Value: AEC-Q101 qualification and +150 °C junction rating ensure reliable operation in under-dash environments where ambient exceeds 85 °C. |
Use Scenario: Secondary-stage surge protection on offline AC/DC adapter inputs after MOV-based primary clamping, targeting residual fast transients. IC Role / Device Role / Timing Role: Fast-response secondary clamp that activates within picoseconds to limit voltage overshoot following MOV turn-off delay. Use Value: Low clamping ratio (VC/VBR ≈ 1.45) and sub-nanosecond response minimize stress on bridge rectifiers and bulk capacitors during repeated surge events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ150CAHE3_B/I | Same electrical specs and SMB package, but RoHS-compliant commercial grade (non-AEC-Q101); uses standard tin plating without halogen-free compound. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and halogen-free materials are not required. |
| SMAJ150CAHM3_A/I | Lower 400 W peak pulse power (vs. 600 W), SMA package (smaller footprint, higher RθJA = 140 °C/W), same VWM/VBR ratings. | Reduced surge handling margin; less thermal margin in high-power or high-ambient environments. | Choose only if board space is constrained and surge threat level is limited to IEC 61000-4-2 ESD or low-energy transients. |
Compared with SMBJ150CAHM3_B/I, the HE3 variant trades automotive qualification for lower cost in non-automotive systems, while the SMAJ150CAHM3_A/I sacrifices 33 % pulse power and thermal performance for smaller size - making SMBJ150CAHM3_B/I optimal for high-reliability, high-energy surge environments.
Availability
SMBJ150CAHM3_B/I is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line protection, automotive body control modules, and AC/DC power supply input stages requiring stable component supply with full traceability and lifecycle management.
Supply support for SMBJ150CAHM3_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, power efficiency, and automotive-grade validation.
The SMBJ series is engineered for high-energy transient suppression in harsh environments, targeting design-in across automotive, industrial automation, and communications infrastructure where robustness and AEC-Q101 compliance are mandatory.
FAQ
What does the "CA" suffix indicate in SMBJ150CAHM3_B/I?
The "CA" suffix denotes a bidirectional configuration - meaning SMBJ150CAHM3_B/I provides symmetrical clamping in both polarities, unlike unidirectional variants (e.g., SMBJ150AHM3_B/I). This makes SMBJ150CAHM3_B/I ideal for protecting AC-coupled signals, differential buses like RS-485, or floating power rails where polarity reversal may occur during transients.
Is SMBJ150CAHM3_B/I qualified for automotive applications?
Yes - the "HM3" suffix confirms SMBJ150CAHM3_B/I is halogen-free, RoHS-compliant, and AEC-Q101 qualified. It has passed stress tests including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling (TCT), making SMBJ150CAHM3_B/I suitable for under-hood and body electronics in passenger vehicles and commercial vehicles.
What is the maximum clamping voltage for SMBJ150CAHM3_B/I at rated surge current?
At its rated peak pulse current of 2.5 A (10/1000 µs waveform), SMBJ150CAHM3_B/I clamps to a maximum of 243 V. This value is specified in the Vishay SMBJ5.0A–SMBJ188A datasheet (Document Number: 88392, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during standardized surge events.
How does the SMB (DO-214AA) package of SMBJ150CAHM3_B/I compare thermally to SMA?
The SMB package used in SMBJ150CAHM3_B/I offers lower thermal resistance than SMA: RθJL = 20 °C/W and RθJA = 100 °C/W (on 0.2" × 0.2" copper pads), versus ~140 °C/W for SMA. This gives SMBJ150CAHM3_B/I superior power dissipation headroom and improved reliability in sustained surge or high-ambient-temperature applications compared to SMAJ-series alternatives.
Does SMBJ150CAHM3_B/I require a heatsink for standard operation?
No - SMBJ150CAHM3_B/I is designed for surface-mount operation without external heatsinking under normal transient conditions. Its 100 °C/W RθJA assumes minimum recommended pad layout (0.2" × 0.2" copper per terminal); additional copper area or internal planes can further reduce thermal resistance, but no heatsink is needed for single-event 600 W pulses or continuous 5.0 W power dissipation at TA ≤ 50 °C.
SMBJ150CAHM3_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):
- 150V
- Voltage - Breakdown (Min):
- 167V
- Voltage - Clamping (Max) @ Ipp:
- 243V
- Current - Peak Pulse (10/1000µs):
- 2.5A
- 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)
SMBJ150CAHM3_B/I FAQ
1.How can I place an order for SMBJ150CAHM3_B/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ150CAHM3_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 SMBJ150CAHM3_B/I reliable?
The price and inventory of SMBJ150CAHM3_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 SMBJ150CAHM3_B/I is usually 5 days.
3.What payment methods are accepted for SMBJ150CAHM3_B/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ150CAHM3_B/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ150CAHM3_B/I?
SMBJ150CAHM3_B/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ150CAHM3_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 SMBJ150CAHM3_B/I?
For technical support, including SMBJ150CAHM3_B/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ150CAHM3_B/I requirements.
6.How does Aetrix verify that SMBJ150CAHM3_B/I is sourced from the original manufacturer or authorized distributors?
All SMBJ150CAHM3_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 SMBJ150CAHM3_B/I meets industry standards.
7.What is the process for return or replacement of SMBJ150CAHM3_B/I?
All SMBJ150CAHM3_B/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ150CAHM3_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 SMBJ150CAHM3_B/I part is unused and in its original packaging.
Return procedure for SMBJ150CAHM3_B/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ150CAHM3_B/I Tags
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DESD3V3E1BL-7B
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Diodes Incorporated
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Diodes Incorporated
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