My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ30CA-M3/61
- Part No.:
- SMAJ30CA-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ30CA-M3/61.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,109
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ30CA-M3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) 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 8.3 A peak pulse current, and 400 W peak pulse power rating with 10/1000 μs waveform - used to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial control systems.
For engineers reviewing the SMAJ30CA-M3/61 datasheet, SMAJ30CA-M3/61 pinout, SMAJ30CA-M3/61 application, or SMAJ30CA-M3/61 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.61), AEC-Q101 qualification eligibility (via HM3 suffix), MSL Level 1 moisture sensitivity, and halogen-free RoHS compliance per base P/N-M3.
Technical Context
This device operates as a voltage-clamping protection element across two terminals, responding to both positive and negative polarity transients without polarity marking. Its silicon avalanche junction delivers sub-nanosecond response time and low incremental surge resistance (ΔV/ΔI ≈ 2.2 Ω), enabling effective suppression of ESD, lightning-induced surges, and inductive switching spikes.
The SMAJ30CA-M3/61 is rated for 150 °C maximum junction temperature and derates linearly above 25 °C ambient, with thermal resistance RθJA = 120 °C/W on standard 0.2" × 0.2" copper pads. It meets UL 497B recognition (QVGQ2) and JESD201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min/max | 33.3 V / 36.8 V at 1 mA - Verified breakdown threshold range; ensures reliable turn-on within 10 % tolerance. |
| VC @ IPPM | 48.4 V at 8.3 A - Clamped voltage during 10/1000 μs surge; determines protected circuit's maximum stress level. |
| PPPM | 400 W - Peak pulse power handling with 10/1000 μs waveform; supports repetitive 0.01 % duty cycle surges. |
| IPPM | 8.3 A - Corresponding peak pulse current at VC; defines minimum PCB trace and layout current-carrying capacity. |
| TJ max | 150 °C - Maximum junction temperature; sets thermal design limits for board-level power dissipation and pad sizing. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm length, 4.50 mm width, and 2.29 mm height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMA (DO-214AC), bidirectional configuration - no polarity marking; symmetrical terminal structure with cathode/anode indistinguishable in function.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (both) | Transient conduction path | Either terminal serves as current entry/exit point during bidirectional surge events; no DC bias dependency. |
| Case | Thermal and mechanical interface | Plastic body provides electrical isolation; copper pad layout per Vishay spec (0.2" × 0.2") required for rated power dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 400 W peak pulse power (10/1000 μs) | Supports robust immunity to IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge testing when properly laid out. |
| Halogen-free & RoHS-compliant (M3) | Meets IPC-1752A material declaration requirements and EU environmental compliance mandates. |
| MSL Level 1 (260 °C peak reflow) | Allows standard lead-free SMT reflow profiles without pre-baking; reduces manufacturing complexity. |
| AEC-Q101 qualification path | Base P/NHM3_X variant available for automotive applications requiring qualified TVS devices. |
Applications
| Automotive Body Control Module | Industrial PLC Digital Input |
|---|---|
|
Use Scenario: Protects microcontroller GPIOs and CAN transceiver signal lines from load dump and alternator ripple in 12 V vehicle systems. IC Role / Device Role / Timing Role: Voltage-clamping TVS placed directly at connector entry point to shunt transients before reaching sensitive logic. Use Value: Limits induced voltage to ≤48.4 V during 10/1000 μs surges, preventing latch-up or gate oxide damage in 3.3 V/5 V interface ICs. |
Use Scenario: Shields 24 V digital input circuits in programmable logic controllers against relay coil flyback and field wiring surges. IC Role / Device Role / Timing Role: Bidirectional clamping element across input terminals to absorb both positive and negative polarity transients. Use Value: Maintains system uptime by preventing false triggering or permanent damage during repeated 400 W surge events. |
| Consumer Appliance Motor Drive | Telecom Power Supply Input |
|
Use Scenario: Installed across brushless DC motor driver FETs to suppress back-EMF spikes during commutation. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed in parallel with power MOSFETs to clamp inductive kick. Use Value: Reduces required FET voltage rating by limiting drain-source voltage to 48.4 V, enabling cost-effective 60 V devices. |
Use Scenario: Mounted at AC-DC adapter input to mitigate lightning-induced surges entering telecom infrastructure equipment. IC Role / Device Role / Timing Role: Primary overvoltage protection stage upstream of rectifier and bulk capacitor. Use Value: Withstands 8.3 A peak current at 48.4 V clamping, meeting GR-1089-CORE Level 3 surge immunity requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30CA-E3/61 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3). | No AEC-Q101 path; suitable for commercial-grade consumer/industrial use only. | Select E3 for cost-sensitive non-automotive designs where halogen content is unrestricted. |
| SMBJ30CA-M3 | Same VWM/VC, but SMB package (DO-214AA); 600 W PPPM rating. | Higher power handling requires larger PCB footprint; better suited for higher-energy surge environments. | Choose SMBJ30CA-M3 when system-level surge tests exceed 400 W or require extended lifetime under repetitive stress. |
Compared with SMAJ30CA-E3/61, the SMAJ30CA-M3/61 adds halogen-free compliance without sacrificing performance; versus SMBJ30CA-M3, it trades 200 W extra pulse power for 30 % smaller board area - critical for space-constrained automotive ECUs and portable industrial sensors.
Availability
SMAJ30CA-M3/61 is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC inputs, consumer appliance motor drives, and telecom power supply protection requiring stable component supply and halogen-free compliance.
Supply support for SMAJ30CA-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 and high-volume manufacturability.
The SMAJ series targets surface-mount transient protection for automotive, industrial, and telecom applications where compact size, fast response, and AEC-Q101 readiness are essential design requirements.
FAQ
What is the clamping voltage of SMAJ30CA-M3/61 at its rated peak pulse current?
The SMAJ30CA-M3/61 has a maximum clamping voltage (VC) of 48.4 V at 8.3 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per ANSI/IEEE C62.35 standards and defines the upper voltage limit imposed on protected circuitry during surge events. The SMAJ30CA-M3/61 maintains this clamping performance across its full operating temperature range of -55 °C to +150 °C.
Is SMAJ30CA-M3/61 suitable for automotive applications?
SMAJ30CA-M3/61 itself is not AEC-Q101 qualified, but it shares identical electrical and mechanical specifications with the AEC-Q101-qualified variant SMAJ30CA-HM3_X (where "_X" denotes revision code). The M3 suffix confirms halogen-free, RoHS-compliant construction - a prerequisite for automotive qualification. Customers requiring certified parts should order SMAJ30CA-HM3_A or later revisions for production use in automotive ECUs.
What is the standoff voltage rating for SMAJ30CA-M3/61?
The standoff voltage (VWM) of SMAJ30CA-M3/61 is 30 V - the maximum DC or continuous AC voltage that can be applied without initiating significant leakage current (<1 μA). This rating ensures compatibility with 24 V industrial control systems and 12 V automotive domains while maintaining sufficient margin below the 33.3 V minimum breakdown voltage (VBR). The SMAJ30CA-M3/61 remains fully inactive below VWM, preserving signal integrity and minimizing standby power loss.
Does SMAJ30CA-M3/61 have polarity markings?
No, SMAJ30CA-M3/61 does not have polarity markings because it is a bidirectional TVS diode. Its internal structure consists of two opposing avalanche junctions, allowing symmetrical clamping behavior for both positive- and negative-going transients. This eliminates orientation constraints during PCB placement and simplifies layout for differential or floating signal lines. The SMAJ30CA-M3/61 case conforms to DO-214AC mechanical dimensions regardless of mounting direction.
What is the peak pulse power rating of SMAJ30CA-M3/61 and under what test condition?
The SMAJ30CA-M3/61 is rated for 400 W peak pulse power (PPPM) using the standardized 10/1000 μs double-exponential waveform defined by R.E.A. and ANSI/IEEE C62.35. This rating applies at TA = 25 °C with devices mounted on 0.2" × 0.2" copper pads per Vishay's recommended layout. Above 78 V VWM, the rating drops to 300 W - but SMAJ30CA-M3/61 remains at full 400 W due to its 30 V rating. The SMAJ30CA-M3/61 sustains this rating at 0.01 % duty cycle for repetitive surge events.
SMAJ30CA-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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 8.3A
- Power - Peak Pulse:
- 400W
- 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)
SMAJ30CA-M3/61 FAQ
1.How can I place an order for SMAJ30CA-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ30CA-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 SMAJ30CA-M3/61 reliable?
The price and inventory of SMAJ30CA-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 SMAJ30CA-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ30CA-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ30CA-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ30CA-M3/61?
SMAJ30CA-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ30CA-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 SMAJ30CA-M3/61?
For technical support, including SMAJ30CA-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ30CA-M3/61 requirements.
6.How does Aetrix verify that SMAJ30CA-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ30CA-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 SMAJ30CA-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ30CA-M3/61?
All SMAJ30CA-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ30CA-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 SMAJ30CA-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ30CA-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ30CA-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 …
