My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMAJ54CA-M3/61
- Part No.:
- SMAJ54CA-M3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ54CA-M3/61.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,191
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ54CA-M3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection of sensitive electronics. 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 (10/1000 μs waveform), commonly deployed on power rails and signal lines in automotive ECUs and industrial sensor interfaces.
For engineers reviewing the SMAJ54CA-M3/61 datasheet, SMAJ54CA-M3/61 pinout, SMAJ54CA-M3/61 application, or SMAJ54CA-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 compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This bidirectional TVS diode operates symmetrically across both polarities, delivering identical clamping performance in forward and reverse directions. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ps), while the low incremental surge resistance enables effective energy diversion during ESD and lightning-induced transients.
The device is rated for 400 W peak pulse power up to 78 V and derates to 300 W above 78 V, with thermal resistance of 120 °C/W (junction-to-ambient) and 30 °C/W (junction-to-lead). It supports operating junction temperatures from –55 °C to +150 °C and meets JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 54 V - Maximum continuous reverse voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 60.0–66.3 V at 1 mA - Confirmed minimum/maximum threshold where avalanche conduction initiates reliably. |
| VC (Clamping Voltage) | 87.1 V at IPPM = 4.6 A - Peak voltage seen by protected circuit during 10/1000 μs transient; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 400 W (≤78 V), 300 W (>78 V) - Energy-handling capacity under standardized surge waveform; defines transient immunity level. |
| IPPM (Peak Pulse Current) | 4.6 A - Maximum surge current the device safely clamps without degradation; derived from PPPM/VC. |
| TJmax | +150 °C - Maximum allowable junction temperature; sets thermal design limits for PCB pad layout and power cycling. |
| Package | SMA (DO-214AC) - Surface-mount package with 2.54 mm lead pitch, optimized for high-volume pick-and-place and reflow soldering. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (bidirectional) | Non-polarized terminals | No polarity marking; symmetrical conduction allows installation without orientation check - simplifies assembly and eliminates reverse-mount risk. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions - enables single-device protection of AC-coupled or floating signal lines without external polarity management. |
| 400 W peak pulse power | Rated per 10/1000 μs waveform on 0.2" × 0.2" copper pads - provides validated surge immunity against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 Level 3 transients. |
| Low clamping ratio | VC/VWM = 1.61 - minimizes overvoltage overshoot during clamping, reducing stress on 5V–60V logic and analog ICs. |
| AEC-Q101 readiness | M3 suffix denotes halogen-free, RoHS-compliant construction; HE3/HM3 variants are AEC-Q101 qualified - supports automotive-grade sourcing without redesign. |
| MSL Level 1 rating | Unlimited floor life at ≤30 °C/60 % RH - eliminates bake requirements prior to reflow, lowering manufacturing cost and cycle time. |
Applications
| Automotive Body Control Module | Industrial RS-485 Interface |
|---|---|
|
Use Scenario: Protects LIN bus transceivers and microcontroller I/O pins from load-dump and inductive switching spikes in door modules and lighting controllers. IC Role / Device Role: Primary bidirectional overvoltage clamp placed directly at connector entry point before ESD diode array. Use Value: Clamps transients up to 87.1 V within nanoseconds, preventing latch-up or gate oxide damage in 5V/12V automotive MCUs without adding series impedance. |
Use Scenario: Shields differential data lines of RS-485 transceivers in factory automation PLCs exposed to motor drive noise and ground bounce. IC Role / Device Role: Common-mode TVS across A/B lines and line-to-ground, leveraging symmetry to suppress both differential and common-mode surges. Use Value: Maintains signal integrity by limiting voltage excursion to ≤87.1 V while preserving <1 pF junction capacitance - avoids data rate degradation at 10 Mbps. |
| Consumer Appliance Motor Drive | Telecom Power Supply Input |
|
Use Scenario: Safeguards MCU GPIOs and Hall-effect sensor inputs in smart washing machine motor control boards subjected to brush-commutator arcing. IC Role / Device Role: Localized clamping device mounted adjacent to each sensor input trace, minimizing loop inductance. Use Value: Responds in <1 ps to sub-microsecond spikes, limiting induced voltage to 87.1 V and enabling use of cost-effective 100 V-rated FETs and op-amps. |
Use Scenario: Front-end protection for 48 V telecom DC-DC converters against lightning-induced surges entering via PoE or battery backup lines. IC Role / Device Role: First-stage coarse clamp upstream of active OVP and filtering, handling bulk energy before precision regulation. Use Value: Absorbs 400 W pulses without failure, allowing downstream TVS arrays and crowbar circuits to handle residual overshoot - improves system-level surge survivability. |
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-M3/61 | Unidirectional; cathode band marking required; same VWM, VBR, VC, and PPPM. | Requires correct orientation during placement; unsuitable for AC or floating nodes. | Select when protecting DC-biased unidirectional lines (e.g., 54 V supply rail) and board space permits polarity verification. |
| SMBJ54CA-T3 | Same VWM/VBR/VC; SMB package (DO-214AA); 600 W PPPM; higher thermal mass. | Larger footprint (4.58 mm × 3.94 mm vs. 4.50 mm × 2.79 mm); better heat dissipation but lower density. | Choose for higher-energy transients (>400 W) or where existing SMB footprint exists and layout change is impractical. |
Compared with SMAJ54CA-M3/61, the unidirectional SMAJ54A-M3/61 demands strict orientation control but offers identical electrical protection in DC systems, while SMBJ54CA-T3 trades compactness for 50 % higher surge rating and improved thermal performance in space-tolerant designs.
Availability
SMAJ54CA-M3/61 is available at Aetrix Electronics and suitable for automotive body electronics, industrial communication interfaces, consumer appliance motor controls, and telecom power input stages requiring stable component supply, halogen-free compliance, and SMT-ready packaging.
Supply support for SMAJ54CA-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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where robustness against ESD, EFT, and surge events is critical.
FAQ
What is the clamping voltage of SMAJ54CA-M3/61 under a 10/1000 μs surge?
The SMAJ54CA-M3/61 exhibits a maximum clamping voltage (VC) of 87.1 V when subjected to its rated peak pulse current of 4.6 A under the standard 10/1000 μs waveform. This value is measured at TA = 25 °C on 0.2" × 0.2" copper pads and defines the upper voltage limit imposed on protected circuitry during transient events. The SMAJ54CA-M3/61 maintains this clamping performance bidirectionally, ensuring consistent protection regardless of surge polarity.
Is SMAJ54CA-M3/61 suitable for automotive applications?
Yes - while the base SMAJ54CA-M3/61 is commercial-grade and halogen-free/RoHS-compliant, it shares the same die and construction as AEC-Q101-qualified variants (e.g., SMAJ54CAHM3_X). Its glass-passivated junction, –55 °C to +150 °C operating range, MSL Level 1 rating, and compatibility with automotive surge standards (ISO 7637-2, ISO 16750-2) make SMAJ54CA-M3/61 a direct drop-in candidate for non-safety-critical automotive modules pending qualification testing. The SMAJ54CA-M3/61 is widely used in body control units and infotainment power rails.
How does the bidirectional design of SMAJ54CA-M3/61 affect PCB layout?
The SMAJ54CA-M3/61 has no polarity marking and conducts identically in both directions, eliminating orientation constraints during placement. This simplifies PCB layout by removing the need for silkscreen polarity indicators, reducing assembly errors, and enabling flexible routing on differential or floating nodes (e.g., RS-485 A/B lines, transformer-coupled signals). Unlike unidirectional TVS diodes, the SMAJ54CA-M3/61 can be placed without regard to anode/cathode alignment - a key advantage in dense, high-speed layouts where trace symmetry matters.
What is the thermal resistance of SMAJ54CA-M3/61, and how does it impact power handling?
The SMAJ54CA-M3/61 has a typical junction-to-ambient thermal resistance (RθJA) of 120 °C/W and junction-to-lead resistance (RθJL) of 30 °C/W. These values mean that under continuous DC conditions, even 3.3 W power dissipation (its rated PD) would raise junction temperature by 396 °C above ambient - far exceeding its 150 °C limit. Hence, the SMAJ54CA-M3/61 is intended strictly for transient, not steady-state, operation. Its 400 W rating applies only to short-duration pulses (≤50 ms), where thermal inertia prevents catastrophic heating. Proper copper pad sizing remains essential for pulse energy dissipation.
Can SMAJ54CA-M3/61 replace SMAJ54A-M3/61 without layout changes?
Yes - SMAJ54CA-M3/61 and SMAJ54A-M3/61 share identical SMA (DO-214AC) package dimensions, solder pad layout, and mechanical footprint. They differ only in polarity: SMAJ54CA-M3/61 is bidirectional with no marking, while SMAJ54A-M3/61 is unidirectional with a cathode band. Therefore, SMAJ54CA-M3/61 can directly replace SMAJ54A-M3/61 on the same PCB without modification, providing enhanced flexibility for AC-coupled or polarity-agnostic designs. However, the reverse substitution requires verifying orientation and may necessitate silkscreen updates.
SMAJ54CA-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):
- 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)
SMAJ54CA-M3/61 FAQ
1.How can I place an order for SMAJ54CA-M3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ54CA-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 SMAJ54CA-M3/61 reliable?
The price and inventory of SMAJ54CA-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 SMAJ54CA-M3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ54CA-M3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ54CA-M3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ54CA-M3/61?
SMAJ54CA-M3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ54CA-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 SMAJ54CA-M3/61?
For technical support, including SMAJ54CA-M3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ54CA-M3/61 requirements.
6.How does Aetrix verify that SMAJ54CA-M3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ54CA-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 SMAJ54CA-M3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ54CA-M3/61?
All SMAJ54CA-M3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ54CA-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 SMAJ54CA-M3/61 part is unused and in its original packaging.
Return procedure for SMAJ54CA-M3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ54CA-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 …
