My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ150CA-M3/61
- Part No.:
- SMAJ150CA-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ150CA-M3/61.pdf
- Description:
- TVS DIODE 150VWM 243VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,932
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ150CA-M3/61 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in 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 1.2 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - suitable for automotive power line surge suppression per ISO 7637-2.
For engineers reviewing the SMAJ150CA-M3/61 datasheet, SMAJ150CA-M3/61 pinout, SMAJ150CA-M3/61 application, or SMAJ150CA-M3/61 equivalent, this device delivers verified bidirectional clamping performance, halogen-free RoHS-compliant construction (M3 suffix), and AEC-Q101 qualification readiness - critical for industrial sensor interfaces, automotive body control modules, and telecom power supply inputs.
Technical Context
This TVS operates symmetrically in both directions due to its bidirectional CA configuration, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response (<1 ns), while the low incremental surge resistance supports effective energy diversion during transient events.
The device is rated for -55 °C to +150 °C operating junction temperature and exhibits a VBR temperature coefficient of 0.108 %/°C - enabling predictable clamping behavior across automotive thermal environments. Mounting on 5.0 mm × 5.0 mm copper pads achieves the specified 400 W pulse rating; derating applies above 25 °C ambient per Fig. 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 150 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating ceiling for protected circuit. |
| VBR (min/max) | 167 V / 185 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on margin above VWM. |
| VC @ IPPM | 243 V at 1.2 A - Measured clamping voltage under 10/1000 μs surge; limits downstream voltage stress during transients. |
| PPPM | 400 W - Peak pulse power handling capability; validates compliance with IEC 61000-4-5 Level 4 surge immunity testing. |
| IFSM | 40 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports fault-current withstand in unidirectional variants (not applicable here, but confirms rugged junction design). |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or high-ambient industrial environments. |
| Package | SMA (DO-214AC) - Standardized surface-mount outline with 5.28 mm × 4.50 mm footprint; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads; meets UL 94 V-0 flammability rating and J-STD-002 solderability requirements. Bidirectional construction means no polarity marking - both terminals are functionally identical.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical terminals enable bidirectional clamping; connects across protected line and ground (or between differential lines) without orientation dependency. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), or floating power domains without external polarity management. |
| 400 W peak pulse power (10/1000 μs) | Validated energy-handling capacity for ISO 7637-2 Pulse 1/2a/5a surges in 12 V automotive systems and industrial 24 V DC supplies. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance mandates for global OEMs and industrial equipment without compromising thermal or electrical performance. |
| MSL Level 1 (J-STD-020) | Allows unlimited floor life and standard reflow profiles up to 260 °C peak - eliminates moisture sensitivity handling constraints in production. |
| AEC-Q101 qualification ready | Base P/NHM3_X variant available; confirms suitability for automotive applications requiring stress-tested reliability (e.g., body electronics, ADAS sensors). |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Suppressing load-dump transients (ISO 7637-2 Pulse 5a) on 12 V battery-fed ECUs in passenger vehicles. IC Role / Device Role / Timing Role: Primary clamping element placed between power rail and chassis ground; responds within <1 ns to limit voltage excursion to ≤243 V. Use Value: Prevents damage to downstream PMICs and microcontrollers by diverting up to 400 W of surge energy without degradation over repeated events. |
Use Scenario: Protecting analog input pins of 4–20 mA current-loop transmitters exposed to field wiring ESD and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional shunt protector across signal and return lines; clamps ±243 V transients while maintaining sub-1 μA leakage at 150 V DC bias. Use Value: Ensures measurement integrity and long-term reliability in harsh factory-floor environments with minimal board space overhead. |
| Telecom DC Power Input | Consumer Equipment Surge Protection |
|
Use Scenario: Safeguarding 48 V DC input stages of PoE-powered network switches against lightning-induced surges (IEC 61000-4-5). IC Role / Device Role / Timing Role: First-line transient suppressor upstream of DC-DC converters; clamps 10/1000 μs surges to 243 V with 1.2 A peak current capability. Use Value: Maintains system uptime by preventing catastrophic failure of primary power conversion circuitry during outdoor installation surges. |
Use Scenario: Adding cost-effective overvoltage resilience to USB-C PD adapter secondary-side outputs subject to plug-in surges. IC Role / Device Role / Timing Role: Secondary-side TVS across VBUS and GND; leverages bidirectional symmetry to handle polarity-agnostic misinsertion events. Use Value: Enables UL/EN 62368-1 compliance with minimal BOM impact - no additional polarity logic or discrete diodes required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ150A-M3/61 | Unidirectional variant; cathode-marked; 243 V clamping same, but only conducts in one polarity. | Requires correct orientation on PCB; unsuitable for AC or floating differential lines. | Select when protecting DC rails with known polarity and space-constrained layouts needing lowest-cost TVS. |
| SMBJ150CA-M3 | Same VWM/VC, but SMB package (DO-214AA); 600 W peak pulse power rating; larger footprint (6.2 mm × 3.5 mm). | Higher power handling supports longer surge durations; requires more PCB area and different pad layout. | Choose when system-level surge tests exceed 400 W or thermal dissipation demands lower RθJA (SMBJ: 90 °C/W vs. SMAJ: 120 °C/W). |
Compared with SMAJ150CA-M3/61, the unidirectional SMAJ150A-M3/61 reduces cost but adds polarity dependency, while the SMBJ150CA-M3 increases surge margin at the expense of board space - making SMAJ150CA-M3/61 the optimal balance for compact, polarity-agnostic 400 W protection.
Availability
SMAJ150CA-M3/61 is available at Aetrix Electronics and suitable for automotive body control modules, industrial 4–20 mA sensor interfaces, telecom 48 V DC inputs, and consumer USB-C PD adapter protection requiring stable component supply and halogen-free compliance.
Supply support for SMAJ150CA-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series is engineered for high-reliability transient suppression in automotive, industrial, and telecom infrastructure - delivering standardized TVS performance in compact surface-mount packages with rigorous qualification and environmental compliance.
FAQ
What is the clamping voltage of SMAJ150CA-M3/61 under a 10/1000 μs surge?
The SMAJ150CA-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 IEC 61000-4-5 test conditions and ensures downstream components see voltage limited to this level during surge events. The SMAJ150CA-M3/61 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMAJ150CA-M3/61 suitable for automotive applications?
Yes - SMAJ150CA-M3/61 is manufactured with halogen-free, RoHS-compliant materials (M3 suffix) and is part of the AEC-Q101-qualified SMAJ family. While the base M3 variant is commercial-grade, the HM3_X suffix version is fully AEC-Q101 qualified. Its 150 V standoff and 243 V clamping align with ISO 7637-2 load-dump and pulse test requirements for 12 V vehicle systems, making SMAJ150CA-M3/61 appropriate for body electronics, lighting controllers, and sensor modules.
How does the bidirectional design of SMAJ150CA-M3/61 affect PCB layout?
The bidirectional CA configuration of SMAJ150CA-M3/61 eliminates polarity marking - both terminals are electrically identical, allowing placement across any two nodes without orientation concern. This simplifies layout for differential signal lines (e.g., CAN, RS-485), AC-coupled circuits, or floating power domains. No cathode band exists; the SMA (DO-214AC) package uses symmetric pad geometry per Vishay's recommended mounting layout (5.0 mm × 5.0 mm copper pads per terminal).
What is the thermal resistance of SMAJ150CA-M3/61, and how does it impact power derating?
SMAJ150CA-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on minimum recommended 5.0 mm × 5.0 mm copper pads. This value directly governs power derating: above 25 °C ambient, the 400 W peak pulse rating decreases per Figure 2 in the datasheet. For sustained operation, its 3.3 W steady-state power dissipation (PD) must also be respected - SMAJ150CA-M3/61 is intended for transient, not continuous, power dissipation.
Does SMAJ150CA-M3/61 meet moisture sensitivity requirements for SMT assembly?
Yes - SMAJ150CA-M3/61 meets MSL Level 1 per J-STD-020, with a maximum lead finish temperature of 260 °C. This means the device has unlimited floor life and can undergo standard Pb-free reflow profiles without baking or special handling. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102, ensuring robust solder joint formation in high-volume manufacturing.
SMAJ150CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMAJ150CA-M3/61 FAQ
1.How can I place an order for SMAJ150CA-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ150CA-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 SMAJ150CA-M3/61 reliable?
The price and inventory of SMAJ150CA-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 SMAJ150CA-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ150CA-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ150CA-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ150CA-M3/61?
SMAJ150CA-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ150CA-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 SMAJ150CA-M3/61?
For technical support, including SMAJ150CA-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ150CA-M3/61 requirements.
6.How does Aetrix verify that SMAJ150CA-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ150CA-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 SMAJ150CA-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ150CA-M3/61?
All SMAJ150CA-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ150CA-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 SMAJ150CA-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ150CA-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ150CA-M3/61 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
