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Vishay General Semiconductor - Diodes Division SMAJ54CAHE3_A/I
- Part No.:
- SMAJ54CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ54CAHE3_A/I.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,905
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Product details
Overview
SMAJ54CAHE3_A/I from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMA (DO-214AC) package, designed for robust overvoltage protection on signal and power lines. It features a 54 V standoff voltage (VWM), 60.0–66.3 V breakdown range (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 to safeguard MOSFETs and sensor interfaces in automotive ECUs.
For engineers reviewing the SMAJ54CAHE3_A/I datasheet, SMAJ54CAHE3_A/I pinout, SMAJ54CAHE3_A/I application, or SMAJ54CAHE3_A/I equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on PCBs with 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional CA construction, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ps), while the SMA package supports high thermal dissipation via low RθJL (30 °C/W) and meets MSL level 1 reflow requirements (peak 260 °C).
The device complies with ANSI/IEEE C62.35 for surge protection standards and delivers consistent clamping performance across -55 °C to +150 °C operating range. Its 0.057 %/°C temperature coefficient of VBR minimizes drift under thermal stress, and it sustains repetitive 400 W pulses at ≤0.01 % duty cycle when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 60.0 V / 66.3 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during transients without premature leakage. |
| VC @ IPPM | 87.1 V at 4.6 A - Clamped voltage during 10/1000 μs surge; limits downstream IC stress to safe levels. |
| PPPM | 400 W - Peak pulse power handling capability; enables protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| IFSM | 40 A - Non-repetitive forward surge rating (8.3 ms half-sine); supports unidirectional surge tolerance where applicable. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in under-hood automotive environments with minimal derating. |
| Package | SMA (DO-214AC) - Surface-mount outline with 5.28 mm × 4.93 mm footprint; optimized for high-volume pick-and-place assembly. |
Pinout & Package
Package: SMA (DO-214AC), molded plastic case with matte tin-plated leads, UL 94 V-0 rated, MSL level 1 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Terminal A | One side of symmetrical bidirectional junction; no polarity marking required for CA devices. |
| Cathode | Terminal K | Other side of symmetrical bidirectional junction; electrically identical to Anode in CA configuration. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress test plan. |
| 400 W peak pulse power | Handles high-energy transients such as load dump and inductive switching spikes without degradation. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected MOSFETs. |
| Fast response time | Sub-nanosecond turn-on ensures suppression occurs before sensitive circuitry experiences damaging overvoltage. |
| RoHS-compliant & halogen-free option | HE3 suffix denotes RoHS compliance; HM3 variant adds halogen-free molding compound for environmental compliance. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed control modules from load dump and alternator ripple in passenger vehicles. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed across power rail upstream of DC-DC converter input. Use Value: Limits transient excursions to ≤87.1 V, preventing overvoltage shutdown or damage to downstream PMICs rated for 60 V input. | Use Scenario: Shielding analog output lines of pressure/temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS placed differential-mode across signal pair near connector entry point. Use Value: Maintains signal integrity with <100 pF junction capacitance while clamping ESD events per IEC 61000-4-2 Level 4 (8 kV contact). |
| Telecom Data Line Surge Suppression | Consumer USB Port Overvoltage Protection |
Use Scenario: Safeguarding RS-485 transceivers in base station backhaul links exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS connected line-to-line and line-to-ground on differential bus. Use Value: Withstands 400 W 10/1000 μs surges per IEC 61000-4-5 Ed.3, preserving communication uptime during grid disturbances. | Use Scenario: Preventing damage to USB-C port controllers during hot-plug insertion or cable ESD events. IC Role / Device Role / Timing Role: Compact SMA device mounted directly at USB receptacle to minimize trace inductance. Use Value: Fast clamping action (<1 ns) limits Vbus excursion to 87.1 V, avoiding brownout or reset of USB PD controller ICs. |
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-M3/5A | Halogen-free molding compound; otherwise identical electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free compliance is mandated by OEM tier-1 requirements. | Choose SMAJ54CA-M3/5A if RoHS + halogen-free material declaration is contractually required. |
| SMCJ54CAHE3_A/I | Same VWM/VBR/VC, but in larger SMC (DO-214AB) package with 1500 W PPPM rating. | Higher power handling suits systems with more severe surge profiles (e.g., 48 V commercial vehicle loads). | Choose SMCJ54CAHE3_A/I only when >400 W surge energy must be absorbed and board space permits larger footprint. |
Compared with SMAJ54CAHE3_A/I, the SMAJ54CA-M3/5A offers identical protection performance with halogen-free materials, while the SMCJ54CAHE3_A/I provides triple the pulse power capacity in a physically larger package-making the SMAJ54CAHE3_A/I optimal for space-constrained, cost-sensitive automotive and industrial designs requiring certified AEC-Q101 reliability.
Availability
SMAJ54CAHE3_A/I is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor nodes, telecom data line interfaces, and consumer USB power delivery systems requiring stable component supply and long-term lifecycle support.
Supply support for SMAJ54CAHE3_A/I 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 was engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where AEC-Q101 qualification and repeatable clamping performance are mandatory.
FAQ
What is the clamping voltage of SMAJ54CAHE3_A/I at its rated peak pulse current?
The SMAJ54CAHE3_A/I has a maximum clamping voltage (VC) of 87.1 V at its specified peak pulse current (IPPM) of 4.6 A under a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet (Doc. #88390, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuits during surge events. The SMAJ54CAHE3_A/I maintains this clamping performance across its full operating temperature range.
Is SMAJ54CAHE3_A/I qualified for automotive applications?
Yes, SMAJ54CAHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3", which denotes RoHS-compliant and AEC-Q101 qualified variants. This qualification covers stress tests including HTGB, H3TRB, temperature cycling, and ESD, making SMAJ54CAHE3_A/I suitable for under-hood and cabin electronics in passenger vehicles and light commercial vehicles.
What does the "CA" suffix mean in SMAJ54CAHE3_A/I?
The "CA" suffix in SMAJ54CAHE3_A/I indicates a bidirectional configuration - meaning the device functions identically in both polarities, with symmetrical breakdown and clamping characteristics. Unlike unidirectional "A" variants, SMAJ54CAHE3_A/I requires no polarity consideration during PCB layout and protects against both positive and negative transients without external circuitry.
What is the thermal resistance of SMAJ54CAHE3_A/I from junction to ambient?
The typical junction-to-ambient thermal resistance (RθJA) of SMAJ54CAHE3_A/I is 120 °C/W when mounted on the minimum recommended pad layout (0.2" × 0.2" copper pads). This value assumes natural convection cooling and is critical for calculating steady-state power dissipation limits; for pulsed operation, junction temperature rise is dominated by transient thermal impedance rather than RθJA.
How does SMAJ54CAHE3_A/I differ from SMAJ54AHE3_A/I?
SMAJ54CAHE3_A/I is bidirectional, while SMAJ54AHE3_A/I is unidirectional - meaning the latter conducts only in reverse bias and requires correct cathode orientation on PCB. The "CA" version eliminates polarity concerns and supports AC-coupled or floating signal lines, whereas the "A" version offers slightly lower leakage at VWM but demands strict layout adherence. Both share identical VWM, VBR, VC, and PPPM ratings.
SMAJ54CAHE3_A/I 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:
- -
- 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_A/I FAQ
1.How can I place an order for SMAJ54CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ54CAHE3_A/I 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_A/I reliable?
The price and inventory of SMAJ54CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ54CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMAJ54CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ54CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ54CAHE3_A/I?
SMAJ54CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ54CAHE3_A/I 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_A/I?
For technical support, including SMAJ54CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ54CAHE3_A/I requirements.
6.How does Aetrix verify that SMAJ54CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMAJ54CAHE3_A/I 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_A/I meets industry standards.
7.What is the process for return or replacement of SMAJ54CAHE3_A/I?
All SMAJ54CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ54CAHE3_A/I, 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_A/I part is unused and in its original packaging.
Return procedure for SMAJ54CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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