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Vishay General Semiconductor - Diodes Division SMAJ54A-M3/61
- Part No.:
- SMAJ54A-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ54A-M3/61.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMAJ54A-M3/61 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMA (DO-214AC) package, designed for clamping voltage transients on power and signal lines. It features a 54 V standoff voltage (VWM), 60.0–66.3 V breakdown voltage (VBR) at 1 mA, 87.1 V maximum clamping voltage (VC) at 4.6 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 power rails.
For engineers reviewing the SMAJ54A-M3/61 datasheet, SMAJ54A-M3/61 pinout, SMAJ54A-M3/61 application, or SMAJ54A-M3/61 equivalent, key selection criteria include unidirectional polarity, 120 °C/W junction-to-ambient thermal resistance, halogen-free RoHS-compliant construction (M3 suffix), and AEC-Q101 qualification eligibility via HM3 variant - critical for automotive ECU and battery management surge protection design.
Technical Context
This TVS diode operates as a fast-acting shunt clamp, entering avalanche conduction when reverse voltage exceeds VBR, limiting transient energy by diverting surge current to ground. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 μA at 54 V).
Designed for 10/1000 μs standard surge waveforms, it delivers 400 W peak pulse power up to 78 V and derates to 300 W above that threshold. Thermal performance is defined by RθJA = 120 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 30 °C/W, supporting reliable operation within -55 °C to +150 °C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 54 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working margin. |
| VBR (Breakdown Voltage) | 60.0–66.3 V at 1 mA - Confirmed avalanche initiation range; ensures predictable turn-on under transients. |
| VC (Clamping Voltage) | 87.1 V at IPPM = 4.6 A - Peak voltage seen by protected circuit during 10/1000 μs surge; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 400 W - Sustained surge energy handling capability per single 10/1000 μs event; rated at TA = 25 °C. |
| IFSM (Surge Current) | 40 A - Maximum non-repetitive forward surge (8.3 ms half-sine); validates robustness against inrush or fault currents. |
| TJ Range | -55 °C to +150 °C - Operational and storage temperature envelope; supports under-hood automotive and industrial ambient conditions. |
| Package | SMA (DO-214AC) - Surface-mount outline with cathode band marking; compatible with automated placement and reflow soldering (MSL Level 1, 260 °C peak). |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated compound. Cathode indicated by band on body; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to ground or low-impedance return path; conducts avalanche current during overvoltage events. |
| Anode (unbanded end) | Protected line input | Connected to power rail or signal line requiring clamping; reverse-biased during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| 400 W peak pulse power (10/1000 μs) | Enables protection against IEC 61000-4-5 Level 3 surges (1 kV/2 Ω) on 12 V/24 V systems without derating. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage stress on protected ICs - e.g., keeps microcontroller I/O below absolute maximum ratings during transients. |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for automotive and industrial OEMs without compromising surge performance. |
| 120 °C/W junction-to-ambient thermal resistance | Supports thermal design on standard PCB layouts (0.2" × 0.2" copper pads); enables >3 W steady-state dissipation with proper layout. |
| AEC-Q101 qualification pathway | HM3 variant available - validated for automotive electronics including engine control, ADAS sensors, and infotainment power supplies. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Suppressing load dump and alternator ripple transients on 12 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VBAT and GND, clamping spikes up to 120 V within nanoseconds. Use Value: Prevents latch-up or permanent damage to 5 V/3.3 V LDO regulators and CAN transceivers during ISO 7637-2 Pulse 5a events. |
Use Scenario: Guarding analog front-end inputs of pressure, temperature, or current sensors exposed to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF) TVS mounted directly at connector entry point to limit voltage before signal conditioning stage. Use Value: Maintains signal integrity while meeting IEC 61000-4-2 ±8 kV contact discharge immunity without adding filtering delay. |
| DC-DC Converter Input Protection | MOSFET Gate Driver Protection |
Use Scenario: Safeguarding buck/boost converter inputs against back-EMF from relay coils, solenoids, or motor drivers. IC Role / Device Role / Timing Role: Fast-response TVS placed upstream of input capacitors to absorb repetitive 100–500 W surges without degradation. Use Value: Extends lifetime of input electrolytic capacitors and prevents overvoltage failure of controller ICs during frequent switching cycles. |
Use Scenario: Protecting high-side/low-side gate drivers from Miller-induced voltage spikes during MOSFET switching transitions. IC Role / Device Role / Timing Role: Clamps transient overshoot on gate-source or gate-drain nodes to stay within ±20 V absolute maximum rating. Use Value: Avoids unintended turn-on or gate oxide breakdown in 40 V–100 V N-channel MOSFETs used in motor drives and power supplies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ54A-E3/61 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs M3). | Preferred for commercial-grade designs where halogen content is unrestricted. | Select E3 for cost-sensitive non-automotive applications; M3 required for halogen-free mandates. |
| SMAJ54AHE3_A/H | Identical electrical parameters; AEC-Q101 qualified, RoHS-compliant, 7" tape/reel packaging. | Validated for automotive use cases requiring qualification evidence and traceability. | Choose HE3/HM3 variants when automotive PPAP or long-term reliability validation is mandatory. |
Compared with SMAJ54A-M3/61, the E3 variant offers identical surge performance at lower material cost but lacks halogen-free certification, while the HE3 variant adds AEC-Q101 qualification and full automotive traceability - making SMAJ54A-M3/61 the optimal balance of environmental compliance and industrial-grade reliability without qualification overhead.
Availability
SMAJ54A-M3/61 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and DC-DC converter input surge suppression requiring stable component supply across production lifecycles.
Supply support for SMAJ54A-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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMAJ series was engineered for high-energy transient suppression in space-constrained surface-mount applications - targeting automotive, industrial, and telecom systems where fast response, repeatable clamping, and thermal resilience are critical.
FAQ
What is the clamping voltage of SMAJ54A-M3/61 at its rated peak pulse current?
The SMAJ54A-M3/61 has a maximum clamping voltage (VC) of 87.1 V at 4.6 A peak pulse current (IPPM) under 10/1000 μs waveform conditions. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuits during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings. The SMAJ54A-M3/61 achieves this with low dynamic impedance and consistent avalanche behavior across its operating temperature range.
Is SMAJ54A-M3/61 suitable for automotive applications?
SMAJ54A-M3/61 itself is not AEC-Q101 qualified, but it belongs to the Vishay SMAJ family where AEC-Q101 variants exist (e.g., SMAJ54AHM3_A/H). The SMAJ54A-M3/61 shares identical electrical specifications and halogen-free RoHS compliance, making it suitable for non-qualified automotive subsystems like cabin electronics or auxiliary power modules. For safety-critical ECUs, the HM3 variant of SMAJ54A-M3/61 must be selected to meet automotive qualification requirements.
What does the "M3" suffix indicate in SMAJ54A-M3/61?
The "M3" suffix in SMAJ54A-M3/61 denotes halogen-free, RoHS-compliant construction per Vishay's material categorization standard. It confirms the molding compound contains no brominated or chlorinated flame retardants and meets JEDEC J-STD-020 MSL Level 1 moisture sensitivity classification with 260 °C peak reflow tolerance. This distinguishes it from the E3 variant (RoHS-compliant but not halogen-free) and supports compliance with strict environmental regulations in EU and Asian markets.
How does SMAJ54A-M3/61 compare to bidirectional TVS diodes like SMAJ54CA?
SMAJ54A-M3/61 is unidirectional and intended for DC line protection with defined polarity, whereas SMAJ54CA is bidirectional and suited for AC or floating signal lines. The SMAJ54A-M3/61 exhibits forward conduction (VF ≈ 3.5 V at 25 A), enabling use in polarity-sensitive circuits, while SMAJ54CA clamps symmetrically in both directions with no forward voltage drop. Select SMAJ54A-M3/61 when protecting regulated DC rails; choose SMAJ54CA only for differential or AC-coupled paths where polarity reversal may occur.
What is the thermal resistance of SMAJ54A-M3/61, and how does it affect PCB layout?
SMAJ54A-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimal copper area - increasing pad size or adding thermal vias reduces RθJA and improves power handling. For sustained 3.3 W dissipation, the layout must maintain adequate copper area and avoid thermal bottlenecks; the SMAJ54A-M3/61's RθJL of 30 °C/W further supports heat transfer to leads in high-current pulse scenarios.
SMAJ54A-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):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 4.6A
- 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)
SMAJ54A-M3/61 FAQ
1.How can I place an order for SMAJ54A-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ54A-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 SMAJ54A-M3/61 reliable?
The price and inventory of SMAJ54A-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 SMAJ54A-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ54A-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ54A-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ54A-M3/61?
SMAJ54A-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ54A-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 SMAJ54A-M3/61?
For technical support, including SMAJ54A-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ54A-M3/61 requirements.
6.How does Aetrix verify that SMAJ54A-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ54A-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 SMAJ54A-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ54A-M3/61?
All SMAJ54A-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ54A-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 SMAJ54A-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ54A-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ54A-M3/61 Tags
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