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Vishay General Semiconductor - Diodes Division SMAJ48CHE3/61
- Part No.:
- SMAJ48CHE3/61
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ48CHE3/61.pdf
- Description:
- TVS DIODE 48VWM 85.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,729
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Product details
Overview
SMAJ48CHE3/61 from Vishay General Semiconductor is a bi-directional transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for robust overvoltage protection of signal and power lines. It features a 48 V stand-off voltage (VWM), 53.3–65.1 V breakdown range (VBR at 1 mA), 85.5 V maximum clamping voltage (VC) at 4.7 A peak pulse current, and 400 W peak pulse power rating with 10/1000 µs waveform - suitable for automotive-grade ESD and surge protection in sensor interfaces and power rails.
For engineers reviewing the SMAJ48CHE3/61 datasheet, SMAJ48CHE3/61 pinout, SMAJ48CHE3/61 application, or SMAJ48CHE3/61 equivalent, this part delivers AEC-Q101 qualified high-reliability transient suppression for automotive electronics, industrial control I/O, and telecom line protection where stable clamping performance and low leakage (<1 µA at 48 V) are critical selection criteria.
Technical Context
This bi-directional TVS operates symmetrically in both polarities, with identical electrical characteristics in forward and reverse directions. Its glass-passivated junction ensures fast response time (<1 ns) and low incremental surge resistance, enabling effective suppression of ESD (IEC 61000-4-2), EFT (IEC 61000-4-4), and lightning-induced surges (IEC 61000-4-5).
The device is rated for 150 °C maximum junction temperature and meets MSL Level 1 per J-STD-020, supporting lead-free reflow up to 260 °C. Its DO-214AC package provides 120 °C/W junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads, enabling reliable operation under repetitive surge conditions at ≤0.01% duty cycle.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VWM) | 48 V - Maximum continuous reverse working voltage before significant conduction begins |
| Breakdown Voltage (VBR) | 53.3–65.1 V at 1 mA - Confirmed minimum/maximum threshold where device enters avalanche conduction |
| Clamping Voltage (VC) | 85.5 V at 4.7 A - Peak voltage seen across protected circuit during 10/1000 µs surge event |
| Peak Pulse Power (PPPM) | 400 W - Sustained energy absorption capability for non-repetitive transients per JEDEC standards |
| Reverse Leakage (ID) | <1 µA at 48 V - Negligible standby current draw, preserving signal integrity and battery life |
| Junction Temperature Range | −55 °C to +150 °C - Validated operating envelope for under-hood automotive and industrial environments |
| AEC-Q101 Qualified | Yes - Certified for automotive applications requiring high reliability and extended temperature cycling |
Pinout & Package
DO-214AC (SMA) surface-mount package with two terminals: anode and cathode. Bi-directional configuration means no polarity marking; terminals are functionally symmetric and interchangeable in circuit layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry point (either polarity) | Accepts surge current during positive or negative overvoltage events; connects to protected line |
| Cathode | Transient current exit point (either polarity) | Completes low-impedance path to ground or reference rail during clamping; symmetric with anode |
Key Features
| Feature | Design Value |
|---|---|
| Bi-directional symmetry | Identical VBR, VC, and IPPM in both directions - eliminates polarity concerns in AC-coupled or floating signal paths |
| AEC-Q101 qualification | Validated for automotive Grade 0/1 environments - supports deployment in engine control units, ADAS sensors, and infotainment systems |
| Glass-passivated junction | Enables sub-nanosecond response and stable long-term leakage performance - critical for precision analog front-ends |
| MSL Level 1 rating | Compatible with standard lead-free reflow profiles up to 260 °C - enables high-yield automated assembly without moisture sensitivity handling |
| RoHS-compliant matte tin plating | Solderable per J-STD-002 and JESD22-B102 - ensures reliable interconnect integrity in high-volume manufacturing |
Applications
| Automotive Sensor Interface Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and MEMS sensor outputs from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bi-directional clamping element placed between signal line and chassis ground to limit transient excursions below IC absolute maximum ratings. Use Value: Maintains signal fidelity during 100 V/50 ms load dump events while drawing <1 µA at 48 V nominal supply, minimizing system power impact. |
Use Scenario: Safeguarding 4–20 mA current loop inputs in programmable logic controllers against field wiring surges and ESD. IC Role / Device Role / Timing Role: Fast-acting shunt protector across input terminals, clamping induced transients before they reach precision op-amps and ADCs. Use Value: Limits voltage to ≤85.5 V during 4.7 A surge, preventing damage to 24 V-rated input stages without affecting loop accuracy during normal operation. |
| Telecom Line Surge Suppression | Power Supply Rail Clamping |
Use Scenario: Secondary-level protection on Ethernet PHY differential pairs and RS-485 data lines exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Bi-directional TVS placed across differential pair to clamp common-mode transients while preserving signal integrity. Use Value: Symmetric clamping ensures equal protection on both lines, eliminating skew or DC offset introduced by uni-directional devices. |
Use Scenario: Overvoltage safeguard on 48 V intermediate bus rails feeding DC-DC converters in base station power systems. IC Role / Device Role / Timing Role: Parallel-connected clamping device that diverts surge energy away from downstream regulators and FETs. Use Value: Absorbs 400 W peak pulse energy without failure, maintaining rail stability during 10/1000 µs transients per IEC 61000-4-5 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48AHE3/61 | Uni-directional variant with same VWM (48 V), lower VC (77.4 V), and higher IPPM (5.2 A); requires correct polarity orientation | Restricted to DC-biased or ground-referenced lines where polarity is fixed; unsuitable for AC or floating signals | Select when protecting unidirectional power rails or logic lines with known polarity and tighter clamping needed |
| SMBJ48CHE3/61 | Same bi-directional functionality but in larger DO-214AA (SMB) package; rated for 600 W PPPM and 7.5 A IPPM | Better suited for higher-energy threats (e.g., direct lightning coupling) but occupies 30% more PCB area | Choose when surge threat level exceeds 400 W or thermal margin is constrained on small copper pads |
Compared with SMAJ48AHE3/61 and SMBJ48CHE3/61, the SMAJ48CHE3/61 uniquely balances AEC-Q101 compliance, bi-directional symmetry, and compact DO-214AC footprint - making it optimal for space-constrained automotive and industrial signal-line protection where polarity-agnostic clamping is required.
Availability
SMAJ48CHE3/61 is available at Aetrix Electronics and suitable for automotive electronics, industrial PLC I/O modules, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ48CHE3/61 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 high-reliability diodes, MOSFETs, and passive components for demanding industrial and automotive applications.
The SMAJ series is engineered specifically for high-speed transient suppression in harsh environments, emphasizing AEC-Q101 qualification, stable clamping performance, and compatibility with automated SMT assembly processes.
FAQ
What does the "HE3" suffix indicate in SMAJ48CHE3/61?
The HE3 suffix denotes high-reliability, automotive-grade qualification per AEC-Q101, RoHS compliance, and JESD201 Class 2 whisker resistance. SMAJ48CHE3/61 is screened for extended temperature cycling, humidity testing, and mechanical shock - distinguishing it from commercial-grade E3 variants. This makes SMAJ48CHE3/61 suitable for under-hood and safety-critical automotive systems where long-term reliability is mandatory.
Is SMAJ48CHE3/61 bi-directional or uni-directional?
SMAJ48CHE3/61 is explicitly bi-directional, as confirmed by its "CA" designation in the full family name SMAJ48CA and documented electrical symmetry in both polarities. Its VBR, VC, and IPPM values apply identically regardless of voltage polarity - verified in the Electrical Characteristics table on page 2 of Vishay document 88390. This eliminates polarity marking and simplifies layout for AC-coupled or floating circuits.
What is the maximum clamping voltage of SMAJ48CHE3/61 under surge conditions?
The maximum clamping voltage (VC) of SMAJ48CHE3/61 is 85.5 V at 4.7 A peak pulse current with a 10/1000 µs waveform, as specified in the Electrical Characteristics table. This value represents the worst-case voltage imposed on the protected circuit during standardized surge events and is validated at TA = 25 °C with recommended 0.2" × 0.2" copper pads per Figure 5 layout.
Does SMAJ48CHE3/61 meet automotive qualification standards?
Yes, SMAJ48CHE3/61 is AEC-Q101 qualified, as explicitly stated in the Mechanical Data section ("Base P/NHE3 - RoHS compliant, high reliability/automotive grade (AEC Q101 qualified)") and reinforced by its HE3 suffix. This certification covers stress tests including temperature cycling, high-temperature operating life, and electrostatic discharge - confirming suitability for automotive powertrain, body control, and ADAS applications.
What is the thermal resistance of SMAJ48CHE3/61, and how does it affect layout?
SMAJ48CHE3/61 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, as specified in the Thermal Characteristics table. This value directly impacts sustained surge handling: larger copper areas or internal planes reduce RθJA, improving power dissipation. Layout must follow Vishay's recommended pad dimensions to ensure rated 400 W pulse power performance.
SMAJ48CHE3/61 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AC, SMA
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 85.5V
- Current - Peak Pulse (10/1000µs):
- 4.7A
- 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)
SMAJ48CHE3/61 FAQ
1.How can I place an order for SMAJ48CHE3/61 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ48CHE3/61 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 SMAJ48CHE3/61 reliable?
The price and inventory of SMAJ48CHE3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ48CHE3/61 is usually 5 days.
3.What payment methods are accepted for SMAJ48CHE3/61?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ48CHE3/61 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ48CHE3/61?
SMAJ48CHE3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ48CHE3/61 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 SMAJ48CHE3/61?
For technical support, including SMAJ48CHE3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ48CHE3/61 requirements.
6.How does Aetrix verify that SMAJ48CHE3/61 is sourced from the original manufacturer or authorized distributors?
All SMAJ48CHE3/61 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 SMAJ48CHE3/61 meets industry standards.
7.What is the process for return or replacement of SMAJ48CHE3/61?
All SMAJ48CHE3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ48CHE3/61, 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 SMAJ48CHE3/61 part is unused and in its original packaging.
Return procedure for SMAJ48CHE3/61:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ48CHE3/61 Tags
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