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Vishay General Semiconductor - Diodes Division SMAJ150A-M3/61
- Part No.:
- SMAJ150A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ150A-M3/61.pdf
- Description:
- TVS DIODE 150VWM 243VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:7,687
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Product details
Overview
SMAJ150A-M3/61 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 150 V stand-off voltage (VWM), 167–185 V breakdown voltage (VBR) at 1 mA, 243 V maximum clamping voltage (VC) at 1.2 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - deployed to safeguard MOSFETs, ICs, and sensor interfaces in industrial motor drives and automotive power modules.
For engineers reviewing the SMAJ150A-M3/61 datasheet, SMAJ150A-M3/61 pinout, SMAJ150A-M3/61 application, or SMAJ150A-M3/61 equivalent, key selection criteria include unidirectional polarity, SMA (DO-214AC) package compatibility, 1.0 μA max reverse leakage at VWM, 150 °C max junction temperature, and AEC-Q101 qualification eligibility via HM3 suffix variants.
Technical Context
This TVS diode operates as a clamping-type surge protector: under normal bias it presents high impedance (<1.0 μA leakage at 150 V), then rapidly transitions to low-impedance conduction when transient voltage exceeds its 167–185 V breakdown range. Its glass-passivated junction ensures stable avalanche behavior and repeatable clamping performance across 300–400 W pulse loads.
The device is optimized for fast response (sub-nanosecond), low incremental surge resistance, and thermal stability - with RθJA = 120 °C/W and RθJL = 30 °C/W enabling reliable operation on standard 0.2" × 0.2" copper pads without heatsinking in intermittent surge events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 150 V - maximum continuous reverse operating voltage before significant leakage begins |
| VBR min/max | 167 V / 185 V at 1 mA - defines guaranteed avalanche initiation window for predictable clamping onset |
| VC @ IPPM | 243 V at 1.2 A - clamped voltage seen by protected circuit during full-rated 10/1000 μs surge |
| PPPM | 400 W - peak surge power handling capability with industry-standard 10/1000 μs waveform |
| ID @ VWM | ≤1.0 μA - ultra-low leakage preserves signal integrity and minimizes standby power loss |
| TJ max. | +150 °C - enables deployment in under-hood automotive and industrial environments |
| Package | SMA (DO-214AC) - surface-mount footprint compatible with automated assembly and IPC-7351B land patterns |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; cathode indicated by band marking on unidirectional devices; meets UL 94 V-0 flammability rating and JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection in unidirectional configuration | Connected to ground or return path; conducts surge current toward reference plane |
| Cathode | High-side connection with polarity band marking | Connected to protected line; blocks DC up to 150 V, avalanches above 167 V |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12–48 V DC rails |
| 1.0 μA max reverse leakage at VWM | Minimizes parasitic loading on high-impedance sensor inputs and precision analog circuits |
| MSL Level 1 (260 °C peak reflow) | Supports single-pass lead-free reflow without moisture-induced damage or delamination |
| AEC-Q101 qualified option (HM3 suffix) | Validates reliability for automotive powertrain and body electronics per stress-test requirements |
| Glass-passivated junction | Ensures stable VBR tolerance and long-term clamping consistency across temperature and life cycles |
Applications
| Industrial Motor Drives | Automotive Power Modules |
|---|---|
Use Scenario: Protection of gate drivers and bootstrap circuits against inductive kickback from IGBT/MOSFET switching in 24–48 V BLDC inverters. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient spikes on high-side gate supply lines to prevent driver latch-up or oxide breakdown. Use Value: Limits voltage excursion to ≤243 V during 1.2 A surge, preserving gate oxide integrity and enabling >100,000-cycle reliability under repetitive load switching. | Use Scenario: Input rail protection for DC-DC converters powering ADAS sensors in 12 V battery-connected systems. IC Role / Device Role / Timing Role: Primary surge limiter on converter input, placed upstream of EMI filter and LDO to absorb load-dump transients per ISO 7637-2 Pulse 5a. Use Value: Clamps 12 V system transients up to 150 V stand-off while maintaining <1 μA leakage - no impact on quiescent current budget. |
| Telecom Power Feeds | Industrial PLC I/O Modules |
Use Scenario: Overvoltage hardening of -48 V telecom power distribution boards exposed to lightning-induced surges on long-line feeds. IC Role / Device Role / Timing Role: Secondary clamping device downstream of gas discharge tube (GDT), providing fast-response voltage limiting after GDT ionization delay. Use Value: Responds in <1 ns to clamp residual overshoot to 243 V, preventing damage to downstream DC/DC controllers and monitoring ICs. | Use Scenario: Field-side protection for 24 V digital input cards receiving signals from proximity switches and limit sensors in factory automation. IC Role / Device Role / Timing Role: Line-referenced TVS on each input channel, shunting induced transients from solenoid coil switching or ESD events. Use Value: Withstands repeated 1.2 A surges without parameter shift, ensuring >10-year field life in high-noise manufacturing environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150A-E3/61 | Same electrical specs; RoHS-compliant but not halogen-free; no AEC-Q101 qualification | Preferred for commercial-grade industrial PCBs where halogen content is unrestricted | Select when cost sensitivity outweighs halogen-free requirement or automotive qualification |
| SMAJ150AHM3_A/H | Identical specs; halogen-free + AEC-Q101 qualified; packaged in 7" tape (H code) | Required for automotive OEM designs needing PPAP documentation and extended temperature validation | Select for Tier 1 automotive programs requiring full qualification traceability and material compliance |
Compared with SMAJ150A-M3/61, the E3 variant offers lower unit cost for non-automotive use, while the HM3_A/H provides full automotive qualification and halogen-free assurance - both share identical clamping performance and SMA package fit.
Availability
SMAJ150A-M3/61 is available at Aetrix Electronics and suitable for industrial motor drives, automotive power modules, and telecom power feed applications requiring stable component supply, halogen-free compliance, and commercial-grade reliability.
Supply support for SMAJ150A-M3/61 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, TVS devices, and optoelectronics with emphasis on high-reliability and application-specific performance.
The SMAJ series is engineered for robust transient suppression in harsh environments - targeting industrial automation, automotive subsystems, and telecom infrastructure where consistent clamping, low leakage, and automated assembly compatibility are critical.
FAQ
What is the maximum clamping voltage of SMAJ150A-M3/61 under rated surge conditions?
The SMAJ150A-M3/61 has a maximum clamping voltage (VC) of 243 V when subjected to its rated peak pulse current of 1.2 A with a 10/1000 μs waveform. This value is measured per JEDEC standards and guarantees that protected downstream circuitry will not experience voltages exceeding 243 V during defined surge events - a critical parameter for ensuring MOSFET gate oxide safety and IC input stage survivability in 150 V-class systems.
Is SMAJ150A-M3/61 suitable for automotive applications?
The SMAJ150A-M3/61 itself is halogen-free and RoHS-compliant but not AEC-Q101 qualified. However, Vishay offers the functionally identical SMAJ150AHM3_A/H variant - same electrical specs and SMA package - which carries full AEC-Q101 qualification. For automotive use, specify the HM3_A/H version; SMAJ150A-M3/61 remains appropriate for commercial industrial designs where qualification is not mandated.
What does the "M3" suffix indicate in SMAJ150A-M3/61?
The "M3" suffix in SMAJ150A-M3/61 denotes halogen-free, RoHS-compliant construction meeting IEC 61249-2-21 requirements. It distinguishes this variant from the "E3" (RoHS-compliant but not halogen-free) and "HM3" (halogen-free + AEC-Q101 qualified) versions. All M3 devices use matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and pass JESD 201 Class 2 whisker testing.
How does SMAJ150A-M3/61 compare to SMAJ150A-E3/61 in terms of thermal performance?
SMAJ150A-M3/61 and SMAJ150A-E3/61 share identical thermal characteristics: typical RθJA = 120 °C/W and RθJL = 30 °C/W, with identical SMA (DO-214AC) package dimensions and pad layout recommendations. The only differences are material composition (M3 = halogen-free molding compound) and qualification status - thermal derating curves, junction temperature limits (+150 °C), and surge repetition capability remain fully interchangeable between the two variants.
Can SMAJ150A-M3/61 be used in bidirectional configurations?
No - SMAJ150A-M3/61 is a unidirectional TVS diode, identifiable by its cathode band marking. Bidirectional operation requires the "CA" suffix (e.g., SMAJ150CA). Using SMAJ150A-M3/61 in reverse-biased configurations risks permanent failure due to lack of symmetrical avalanche structure. For AC-coupled or floating signal line protection, select the CA variant or pair unidirectional devices back-to-back.
SMAJ150A-M3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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):
- 1.2A
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ150A-M3/61 FAQ
1.How can I place an order for SMAJ150A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ150A-M3/61 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 SMAJ150A-M3/61 reliable?
The price and inventory of SMAJ150A-M3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ150A-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ150A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ150A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ150A-M3/61?
SMAJ150A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ150A-M3/61 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 SMAJ150A-M3/61?
For technical support, including SMAJ150A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ150A-M3/61 requirements.
6.How does Aetrix verify that SMAJ150A-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ150A-M3/61 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 SMAJ150A-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ150A-M3/61?
All SMAJ150A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ150A-M3/61, 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 SMAJ150A-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ150A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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