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Vishay General Semiconductor - Diodes Division SMAJ48CAHE3/61
- Part No.:
- SMAJ48CAHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ48CAHE3/61.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,195
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Product details
Overview
SMAJ48CAHE3/61 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection on signal and power lines. It features a 48 V standoff voltage (VWM), 53.3–58.9 V breakdown range (VBR), 77.4 V maximum clamping voltage (VC) at 5.2 A peak pulse current, and 400 W peak pulse power (10/1000 μs waveform), commonly deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMAJ48CAHE3/61 datasheet, SMAJ48CAHE3/61 pinout, SMAJ48CAHE3/61 application, or SMAJ48CAHE3/61 equivalent, key selection criteria include bidirectional clamping behavior, AEC-Q101 qualification, SMA (DO-214AC) package compatibility, and thermal resistance (RθJA = 120 °C/W) for board-level surge resilience.
Technical Context
This TVS operates symmetrically in both directions due to its bidirectional construction, enabling suppression of positive and negative transients without polarity sensitivity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 μA at VWM), while the 10/1000 μs waveform rating reflects standardized lightning/surge immunity testing per ANSI/IEEE C62.35.
The device is rated for continuous power dissipation of 3.3 W on an infinite heatsink at 50 °C and supports operating junction temperatures from –55 °C to +150 °C. Its MSL Level 1 moisture sensitivity and matte tin-plated leads comply with J-STD-002 solderability and JESD 22-B102 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse working voltage before clamping initiates; defines safe operating margin below breakdown. |
| VBR (min/max) | 53.3 V / 58.9 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on under transient stress. |
| VC @ IPPM | 77.4 V - Clamped voltage seen by protected circuit at 5.2 A peak pulse; directly limits downstream component stress. |
| PPPM | 400 W - Peak pulse power handling capability with 10/1000 μs waveform; validates compliance with IEC 61000-4-5 Level 4. |
| IPPM | 5.2 A - Peak pulse current corresponding to VC; used to size PCB trace width and verify layout survivability. |
| RθJA | 120 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating above 25 °C ambient. |
| TJ max | +150 °C - Maximum junction temperature; sets upper limit for thermal design in sealed enclosures or high-power environments. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, bidirectional configuration with no polarity marking. Case meets UL 94 V-0 flammability rating; terminals are matte tin-plated for reliable reflow soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides symmetrical conduction path for negative-going surges; connects to ground or common reference plane. |
| Cathode | Transient return path (bidirectional) | Provides symmetrical conduction path for positive-going surges; functionally identical to Anode in CA devices. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control modules and ADAS sensor interfaces per stress test requirements. |
| 400 W peak pulse power (10/1000 μs) | Enables protection against severe lightning-induced surges and inductive switching spikes in industrial motor drives. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage exposure to downstream ICs such as CAN transceivers or microcontroller I/O pins. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking or special handling protocols. |
| Glass passivated junction | Ensures long-term stability of breakdown voltage and leakage current across temperature and lifetime cycling. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine bay environments subject to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between sensor line and chassis ground to shunt transients before reaching ADC input. Use Value: Maintains signal integrity during 100 V/50 ms load dump events while limiting clamped voltage to ≤77.4 V at the sensor interface. |
Use Scenario: Shielding digital input channels on programmable logic controllers exposed to relay coil flyback and ESD in factory automation cabinets. IC Role / Device Role / Timing Role: Fast-response TVS connected across input terminal and common rail to absorb repetitive 400 W surges without degradation. Use Value: Prevents false triggering and latch-up in optocoupler input stages during 1 kV/500 A surge events per IEC 61000-4-5. |
| Telecom Line Interface | Consumer Power Adapter Feedback Loop |
Use Scenario: Safeguarding RS-485 transceiver bus lines in outdoor telecom equipment subjected to induced lightning surges. IC Role / Device Role / Timing Role: Bidirectional TVS placed differential-mode across A/B lines and common-mode to ground to suppress both modes simultaneously. Use Value: Limits differential voltage excursion to <155 V during 10/1000 μs transients, preserving transceiver fault tolerance per TIA-485-A. |
Use Scenario: Securing the optocoupler feedback path in isolated AC/DC adapters where transient coupling may disrupt regulation loop stability. IC Role / Device Role / Timing Role: Low-capacitance TVS (CJ ≈ 100 pF at 0 V) placed across feedback resistor divider to prevent voltage overshoot. Use Value: Clamps feedback node to ≤77.4 V during fast-rising ESD events, avoiding regulator shutdown or output overvoltage faults. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48CA-M3/61 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No functional difference; selected when halogen-free material compliance is mandated by OEM environmental policy. | Choose SMAJ48CA-M3/61 if halogen-free composition is required; otherwise SMAJ48CAHE3/61 offers same performance with standard RoHS compliance. |
| SMBJ48CAHE3/61 | Same VWM, VBR, VC, but higher PPPM = 600 W and larger SMB (DO-214AA) package. | Used where higher surge energy absorption is needed or existing layout accommodates larger footprint. | Select SMBJ48CAHE3/61 only when 600 W rating is required; SMAJ48CAHE3/61 remains optimal for space-constrained designs needing 400 W protection. |
Compared with SMAJ48CA-M3/61, the SMAJ48CAHE3/61 provides identical surge protection performance with standard RoHS compliance, while SMBJ48CAHE3/61 trades compactness for 50 % higher pulse power-making SMAJ48CAHE3/61 the preferred choice for AEC-Q101 automotive applications where board area is constrained and 400 W suffices.
Availability
SMAJ48CAHE3/61 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer power adapter feedback circuits requiring stable component supply and AEC-Q101 assurance.
Supply support for SMAJ48CAHE3/61 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 application-specific validation.
The SMAJ series is engineered for high-reliability transient suppression in harsh environments, targeting automotive, industrial, and telecom systems where consistent clamping performance and AEC-Q101 compliance are mandatory.
FAQ
What does the "CA" suffix indicate in SMAJ48CAHE3/61?
The "CA" suffix denotes a bidirectional configuration, meaning SMAJ48CAHE3/61 provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMAJ48A), it has no cathode marking and functions identically in either polarity-ideal for AC-coupled or differential signal lines where polarity cannot be guaranteed.
Is SMAJ48CAHE3/61 suitable for automotive applications?
Yes, SMAJ48CAHE3/61 is AEC-Q101 qualified, confirming its suitability for automotive use cases including engine control units, body electronics, and ADAS sensor interfaces. Its operating temperature range (–55 °C to +150 °C), robust clamping performance, and MSL Level 1 reflow compatibility meet stringent automotive manufacturing and field reliability requirements.
What is the maximum clamping voltage of SMAJ48CAHE3/61 and at what current is it specified?
The maximum clamping voltage (VC) of SMAJ48CAHE3/61 is 77.4 V, measured at a peak pulse current (IPPM) of 5.2 A using the standardized 10/1000 μs waveform. This value represents the worst-case voltage imposed on the protected circuit during surge events and is critical for ensuring downstream ICs remain within absolute maximum ratings.
How does the SMA (DO-214AC) package of SMAJ48CAHE3/61 compare to SMB (DO-214AA) in terms of board space and thermal performance?
The SMA (DO-214AC) package of SMAJ48CAHE3/61 measures 4.93 mm × 3.99 mm, occupying ~30 % less PCB area than the SMB (DO-214AA) footprint. Its RθJA is 120 °C/W-higher than SMB's typical 85 °C/W-so thermal derating must be applied in high-power-density layouts, but its compact size makes SMAJ48CAHE3/61 ideal for space-constrained automotive and portable electronics.
Does SMAJ48CAHE3/61 require orientation during PCB placement?
No, SMAJ48CAHE3/61 does not require specific orientation because it is a bidirectional TVS diode with no polarity marking. The device functions identically regardless of anode/cathode alignment on the board, simplifying automated placement and eliminating risk of reverse installation-a key advantage over unidirectional variants like SMAJ48A.
SMAJ48CAHE3/61 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):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 77.4V
- Current - Peak Pulse (10/1000µs):
- 5.2A
- 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)
SMAJ48CAHE3/61 FAQ
1.How can I place an order for SMAJ48CAHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ48CAHE3/61 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 SMAJ48CAHE3/61 reliable?
The price and inventory of SMAJ48CAHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ48CAHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ48CAHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ48CAHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ48CAHE3/61?
SMAJ48CAHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ48CAHE3/61 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 SMAJ48CAHE3/61?
For technical support, including SMAJ48CAHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ48CAHE3/61 requirements.
6.How does Aetrix verify that SMAJ48CAHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ48CAHE3/61 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 SMAJ48CAHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ48CAHE3/61?
All SMAJ48CAHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ48CAHE3/61, 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 SMAJ48CAHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ48CAHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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