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Vishay General Semiconductor - Diodes Division SMAJ54CAHE3/61
- Part No.:
- SMAJ54CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ54CAHE3/61.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,136
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Product details
Overview
SMAJ54CAHE3/61 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode designed for robust overvoltage protection on signal and power lines. It features a 54 V standoff voltage (VWM), 60–66.3 V breakdown range (VBR), 87.1 V maximum clamping voltage (VC) at 4.6 A peak pulse current, and 400 W peak pulse power rating (10/1000 μs waveform). It is widely deployed to protect MOSFETs, sensor interfaces, and automotive ECUs against inductive switching transients and ESD.
For engineers reviewing the SMAJ54CAHE3/61 datasheet, SMAJ54CAHE3/61 pinout, SMAJ54CAHE3/61 application, or SMAJ54CAHE3/61 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, SMA (DO-214AC) package compatibility, and verified 150 °C junction temperature operation under surge conditions.
Technical Context
This device operates as a voltage-clamped shunt protector: during transient events exceeding VWM, it avalanches rapidly (<1 ps response) to divert surge current away from downstream circuitry. Its bidirectional symmetry ensures identical clamping behavior for positive and negative polarity surges - critical for AC-coupled or floating signal lines.
The SMAJ54CAHE3/61 uses a glass-passivated silicon junction housed in an SMA (DO-214AC) package with matte tin-plated leads. It meets JESD201 Class 2 whisker resistance, MSL Level 1 per J-STD-020, and is AEC-Q101 qualified for automotive use - distinguishing it from commercial-grade variants like SMAJ54CA-E3/61.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC signal swing margin. |
| VBR (min/max) | 60.0 V / 66.3 V at 1 mA - Verified avalanche onset range; ensures predictable turn-on across temperature and unit variation. |
| VC @ IPPM | 87.1 V at 4.6 A - Clamped voltage during 10/1000 μs surge; determines maximum stress imposed on protected IC inputs. |
| PPPM | 400 W - Peak pulse power handling (10/1000 μs); supports repetitive surge events up to 0.01% duty cycle. |
| IPPM | 4.6 A - Peak surge current capacity at rated clamping voltage; defines minimum PCB trace and layout current-handling requirement. |
| TJ max. | 150 °C - Maximum junction temperature; enables reliable operation in under-hood automotive environments. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm × 4.50 mm footprint; compatible with standard SMT reflow profiles (peak 260 °C). |
Pinout & Package
Package: SMA (DO-214AC) - molded plastic case with two coplanar terminals; no polarity marking for bidirectional configuration; RoHS-compliant and halogen-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | Either terminal serves as anode or cathode depending on transient polarity; no orientation required during placement. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces. |
| 400 W peak pulse power (10/1000 μs) | Withstands high-energy transients from load dump or relay coil de-energization without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during clamping - critical for protecting 3.3 V or 5 V logic-level interfaces. |
| MSL Level 1 moisture sensitivity | Enables unlimited floor life and standard reflow processing without baking or special handling. |
| Glass-passivated junction | Ensures stable leakage performance (<1.0 μA at VWM) and long-term reliability under thermal cycling. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting CAN bus transceivers and analog sensor inputs (e.g., pressure, temperature) in vehicle ECUs exposed to ISO 7637-2 pulses. IC Role / Device Role: Bidirectional shunt clamp placed across differential or single-ended signal lines upstream of interface ICs. Use Value: Maintains signal integrity by limiting transient excursions to ≤87.1 V while surviving repeated 100 V/500 ms load-dump events. |
Use Scenario: Safeguarding 24 V digital input modules in programmable logic controllers subjected to inductive kickback from solenoid valves. IC Role / Device Role: Parallel-connected TVS on each input channel to clamp fast-rising transients before they reach optocoupler or MCU GPIO. Use Value: Prevents false triggering and latch-up in industrial control systems operating continuously at 85 °C ambient. |
| Consumer Power Adapter Protection | Telecom Line Interface Protection |
|
Use Scenario: Secondary-side overvoltage suppression in USB-C PD adapters and AC/DC wall adapters vulnerable to output capacitor failure or feedback loop loss. IC Role / Device Role: Clamp placed between +VOUT and GND to limit output rail excursion during fault conditions. Use Value: Limits worst-case output spike to 87.1 V, preventing damage to connected devices and meeting UL 62368-1 secondary circuit requirements. |
Use Scenario: Surge protection on Ethernet PHY lines (e.g., 10/100BASE-TX) and telephone line interfaces exposed to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role: Bidirectional TVS integrated into front-end protection network alongside common-mode chokes and gas discharge tubes. Use Value: Provides sub-nanosecond response to ±1 kV/500 A surges while maintaining <1.0 μA leakage at 54 V standby. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ54CA-E3/61 | Commercial-grade variant; lacks AEC-Q101 qualification and halogen-free certification. | Approved for consumer and industrial non-automotive use only. | Select when automotive qualification is not required and cost optimization is prioritized. |
| SMBJ54CAHE3/61 | Same electrical specs but in SMB (DO-214AA) package - 25 % larger footprint and 10 % higher thermal resistance (RθJA = 130 °C/W). | Offers higher surge margin due to larger junction area but requires more PCB area. | Choose when higher single-pulse energy handling (>400 W) or legacy SMB layout compatibility is needed. |
Compared with SMAJ54CA-E3/61, the SMAJ54CAHE3/61 adds automotive qualification and halogen-free compliance without sacrificing clamping performance; versus SMBJ54CAHE3/61, it delivers identical protection in a space-constrained SMA footprint - ideal for dense automotive PCBs where board area and AEC-Q101 are mandatory.
Availability
SMAJ54CAHE3/61 is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC I/O modules, and telecom line interface protection requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SMAJ54CAHE3/61 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 and application-specific validation.
The SMAJ series targets high-reliability transient suppression in automotive, industrial, and telecom infrastructure - engineered for fast response, low clamping, and AEC-Q101 compliance from wafer to final test.
FAQ
What is the clamping voltage of SMAJ54CAHE3/61 at its rated peak pulse current?
The SMAJ54CAHE3/61 has a maximum clamping voltage (VC) of 87.1 V at 4.6 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees consistent overvoltage limiting behavior across production lots and temperature ranges from −55 °C to +150 °C. The SMAJ54CAHE3/61 maintains this clamping performance even after repeated surge events within its specified duty cycle.
Is SMAJ54CAHE3/61 suitable for automotive applications?
Yes, SMAJ54CAHE3/61 is AEC-Q101 qualified and specifically designated for automotive use - indicated by the "HE3" suffix. It undergoes stress testing for temperature cycling, humidity bias, mechanical shock, and surge endurance per AEC-Q101 Rev D. The SMAJ54CAHE3/61 is commonly used in engine control units, body control modules, and ADAS sensor interfaces where reliability under harsh environmental conditions is mandatory.
How does SMAJ54CAHE3/61 differ from unidirectional SMAJ54AHE3/61?
The SMAJ54CAHE3/61 is bidirectional, providing symmetrical clamping for both positive and negative transients - essential for AC-coupled lines, differential buses, or floating grounds. In contrast, SMAJ54AHE3/61 is unidirectional with a cathode band marking and only clamps in reverse bias; forward conduction occurs above ~3.5 V. The SMAJ54CAHE3/61 has no polarity marking and supports dual-polarity protection without circuit redesign.
What is the maximum operating temperature for SMAJ54CAHE3/61?
The SMAJ54CAHE3/61 has a maximum junction temperature (TJ) of +150 °C and an operating storage range of −55 °C to +150 °C. Its thermal resistance from junction to ambient (RθJA) is 120 °C/W on standard 0.2″ × 0.2″ copper pads. Derating curves in the datasheet confirm sustained operation at full power up to +100 °C ambient when mounted per recommended pad layout - making the SMAJ54CAHE3/61 suitable for under-hood automotive environments.
Does SMAJ54CAHE3/61 require orientation during PCB placement?
No, SMAJ54CAHE3/61 does not require orientation during placement because it is a bidirectional device with symmetrical terminals - neither end is marked as anode or cathode. The SMAJ54CAHE3/61 functions identically regardless of mounting direction, simplifying automated assembly and eliminating risk of polarity-related field failures. This contrasts with unidirectional variants that feature a visible cathode band.
SMAJ54CAHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ54CAHE3/61 FAQ
1.How can I place an order for SMAJ54CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ54CAHE3/61 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 SMAJ54CAHE3/61 reliable?
The price and inventory of SMAJ54CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ54CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ54CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ54CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ54CAHE3/61?
SMAJ54CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ54CAHE3/61 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 SMAJ54CAHE3/61?
For technical support, including SMAJ54CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ54CAHE3/61 requirements.
6.How does Aetrix verify that SMAJ54CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ54CAHE3/61 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 SMAJ54CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ54CAHE3/61?
All SMAJ54CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ54CAHE3/61, 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 SMAJ54CAHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ54CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ54CAHE3/61 Tags
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