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Vishay General Semiconductor - Diodes Division SMBJ150AHM3_A/I
- Part No.:
- SMBJ150AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ150AHM3_A/I.pdf
- Description:
- TVS DIODE 150VWM 243VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBJ150AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 150 V standoff voltage (VWM), 167–185 V breakdown range (VBR at 1 mA), 243 V maximum clamping voltage (VC) at 2.5 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial motor drives, telecom power supplies, and automotive body control modules.
For engineers reviewing the SMBJ150AHM3_A/I datasheet, SMBJ150AHM3_A/I pinout, SMBJ150AHM3_A/I application, or SMBJ150AHM3_A/I equivalent, key selection criteria include clamping performance under 2.5 A surge, thermal resistance (RθJA = 100 °C/W), AEC-Q101 qualification status, halogen-free RoHS compliance (HM3 suffix), and compatibility with automated SMT placement on standard 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, leveraging glass-passivated junction technology to achieve sub-nanosecond response time and low incremental surge resistance. Its cathode-band polarity marking enables unambiguous PCB orientation during assembly, and it meets MSL Level 1 per J-STD-020 with 260 °C reflow peak temperature tolerance.
The device is rated for -55 °C to +150 °C operating junction temperature, supports 100 A non-repetitive forward surge (8.3 ms half-sine), and delivers stable clamping across temperature due to a +0.108 %/°C VBR temperature coefficient - critical for high-temperature industrial environments where leakage and clamping drift must remain predictable.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 150 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin for 120–150 V DC bus protection. |
| VBR (min/max) | 167 V / 185 V at 1 mA - Confirmed breakdown threshold range; ensures reliable triggering above normal operating voltage with margin against false trips. |
| VC @ IPPM | 243 V at 2.5 A (10/1000 µs) - Clamped voltage seen by protected circuit during worst-case transient; limits stress on downstream MOSFETs or controllers. |
| PPPM | 600 W - Peak pulse power handling capability; sustains short-duration surges from inductive switching or ESD without degradation. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard pad layout; determines required board copper area for thermal management at 5 W steady-state dissipation. |
| IFSM | 100 A - Peak forward surge current rating (8.3 ms half-sine); validates survivability during accidental reverse-polarity connection or fault currents. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive or enclosed industrial enclosures without derating. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), with cathode band marking on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes conduction path during reverse-biased transient clamp event. |
| Cathode | High-side transient input terminal | Connected to protected line (e.g., 150 V rail); avalanche breakdown initiates here when voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - suitable for BCM, lighting, and infotainment power rails. |
| 600 W peak pulse power (10/1000 µs) | Withstands repetitive transients from relay coil de-energization or load dump events without parametric shift or failure. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time), improving protection margin for sensitive gate drivers and ADC references. |
| MSL Level 1 moisture sensitivity | Enables direct placement without baking; compatible with standard SMT reflow profiles up to 260 °C peak. |
| Halogen-free & RoHS-compliant (HM3) | Fulfills environmental compliance requirements for export to EU, China, and Japan while maintaining solderability per J-STD-002. |
Applications
| Industrial Motor Drives | Telecom Power Supplies |
|---|---|
|
Use Scenario: Protection of 150 V DC link capacitors and IGBT gate drivers against switching-induced voltage spikes and lightning-induced surges on AC input rectifier outputs. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed across DC bus to shunt transient energy to ground before it reaches power stage components. Use Value: Limits clamped voltage to 243 V, preserving 300 V-rated IGBTs and reducing need for oversized snubbers or derated bus capacitors. |
Use Scenario: Input-stage surge suppression on -48 V telecom rectifier modules exposed to induced transients from nearby power cables or grounding faults. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between -48 V rail and chassis ground to absorb 600 W pulses without latch-up or thermal runaway. Use Value: Maintains <1 µA leakage at -48 V, avoiding unnecessary standby current draw while delivering sub-100 ns response to fast-rising common-mode surges. |
| Automotive Body Control Modules | Industrial Sensor Signal Conditioning |
|
Use Scenario: Protection of LIN bus transceivers and microcontroller I/O pins against load dump and jump-start transients in 12 V/24 V vehicle electrical systems. IC Role / Device Role / Timing Role: Unidirectional TVS placed on power input to BCM MCU, referenced to battery ground, with cathode tied to protected rail. Use Value: AEC-Q101 qualification ensures operation across -40 °C to +125 °C ambient, and 100 A IFSM withstands 12 V system jump-start faults. |
Use Scenario: Transient suppression on analog sensor inputs (e.g., pressure, temperature) in factory automation PLCs exposed to EMI from variable-frequency drives. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 50 pF typical at 0 V) placed inline with 4–20 mA loop or ratiometric voltage output. Use Value: Clamps 1 kV ESD events to <250 V within 1 ns, preventing op-amp saturation or ADC latch-up without distorting millivolt-level signals. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ150AHE3_A/I | Same electrical specs and package, but RoHS-compliant commercial grade (E3) - not AEC-Q101 qualified; higher ID leakage (1.0 µA vs. 1.0 µA same), identical VC. | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select when cost sensitivity outweighs automotive reliability requirements and full qualification documentation is not required. |
| SMCJ150A-HM3_A/I | Same VWM/VBR/VC, but larger SMC (DO-214AB) package - lower RθJA (50 °C/W), higher IPPM (13.3 A), same PPPM (600 W). | Requires larger PCB footprint; better thermal performance allows higher duty-cycle surge handling in compact heatsinkless layouts. | Choose when board space permits and improved thermal margin or higher single-pulse current endurance is needed. |
Compared with SMBJ150AHM3_A/I, the SMBJ150AHE3_A/I omits AEC-Q101 validation and uses standard RoHS plating, while the SMCJ150A-HM3_A/I trades footprint efficiency for superior thermal dissipation and surge current headroom - enabling longer transient duration tolerance in thermally constrained designs.
Availability
SMBJ150AHM3_A/I is available at Aetrix Electronics and suitable for industrial motor drives, telecom power supplies, and automotive body control modules requiring stable component supply, halogen-free compliance, and AEC-Q101 assurance.
Supply support for SMBJ150AHM3_A/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, power efficiency, and automotive-grade qualification.
The SMBJ series is engineered for high-energy transient suppression in space-constrained surface-mount applications, targeting industrial, telecom, and automotive systems where robustness, fast response, and standardized packaging are essential.
FAQ
What is the clamping voltage of SMBJ150AHM3_A/I at its rated peak pulse current?
The SMBJ150AHM3_A/I has a maximum clamping voltage (VC) of 243 V when subjected to its specified peak pulse current of 2.5 A using the 10/1000 µs waveform. This value is measured under standardized test conditions per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream components like MOSFETs or controllers remain within safe operating voltage ranges. The SMBJ150AHM3_A/I maintains this clamping performance across its full operating temperature range.
Is SMBJ150AHM3_A/I qualified for automotive applications?
Yes, SMBJ150AHM3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in the SMBJ5.0A–SMBJ188A datasheet (Document Number: 88392, Revision: 09-Jan-2024). This qualification covers stress tests including temperature cycling, highly accelerated life testing (HALT), and mechanical shock - validating its suitability for under-hood and chassis-mounted automotive electronics such as body control modules and lighting drivers. The SMBJ150AHM3_A/I meets all requirements for Grade 2 (-40 °C to +125 °C) operation.
What does the "HM3" suffix indicate in SMBJ150AHM3_A/I?
The "HM3" suffix in SMBJ150AHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from commercial-grade variants like E3 or HE3. Specifically, HM3 confirms compliance with JEDEC J-STD-020 MSL Level 1, matte tin plating per JESD 22-B102, and whisker resistance per JESD 201 Class 2. This suffix directly identifies the SMBJ150AHM3_A/I as a high-reliability, environmentally compliant part intended for demanding industrial and automotive deployments where material content and long-term stability are tightly controlled.
How does SMBJ150AHM3_A/I compare to bidirectional TVS diodes like SMBJ150CA?
SMBJ150AHM3_A/I is unidirectional and optimized for DC rail protection with cathode-anode polarity, whereas SMBJ150CA is bidirectional and suited for AC-coupled or symmetrical signal-line protection. The SMBJ150AHM3_A/I exhibits lower leakage (<1.0 µA at 150 V) and supports forward surge current (IFSM = 100 A), unlike the bidirectional variant. Its clamping behavior is asymmetric - conducting only during reverse overvoltage - making it ideal for protecting grounded DC supplies. Engineers must select SMBJ150AHM3_A/I when polarity is fixed and forward fault current capability is required.
What PCB pad layout is recommended for optimal thermal performance of SMBJ150AHM3_A/I?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad for each terminal of SMBJ150AHM3_A/I to achieve the published RθJA of 100 °C/W. These pads should be connected to internal or external ground/power planes via multiple thermal vias (≥4 per pad, 0.3 mm diameter) to reduce junction-to-ambient resistance. The SMBJ150AHM3_A/I datasheet explicitly states that derating curves (Fig. 2) and pulse ratings (Fig. 1) assume this layout - deviating from it increases thermal impedance and risks exceeding TJ max during repetitive surges.
SMBJ150AHM3_A/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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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)
SMBJ150AHM3_A/I FAQ
1.How can I place an order for SMBJ150AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ150AHM3_A/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 SMBJ150AHM3_A/I reliable?
The price and inventory of SMBJ150AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ150AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ150AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ150AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ150AHM3_A/I?
SMBJ150AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ150AHM3_A/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 SMBJ150AHM3_A/I?
For technical support, including SMBJ150AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ150AHM3_A/I requirements.
6.How does Aetrix verify that SMBJ150AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ150AHM3_A/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 SMBJ150AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ150AHM3_A/I?
All SMBJ150AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ150AHM3_A/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 SMBJ150AHM3_A/I part is unused and in its original packaging.
Return procedure for SMBJ150AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ150AHM3_A/I Tags
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