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Vishay General Semiconductor - Diodes Division SMBJ48CAHE3/52
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- Part No.:
- SMBJ48CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48CAHE3/52.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,588
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Product details
Overview
SMBJ48CAHE3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR) at 1 mA, 77.4 V maximum clamping voltage (VC) at 7.8 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform). It protects MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment against ESD and inductive switching surges.
For engineers reviewing the SMBJ48CAHE3/52 datasheet, SMBJ48CAHE3/52 pinout, SMBJ48CAHE3/52 application, or SMBJ48CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (−55 to +150 °C), and compliance with UL 497B surge protector classification.
Technical Context
This device operates as a voltage-clamping protection element across bidirectional AC or DC lines, responding within <1 ps to transient overvoltages. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1 µA at VWM), while the SMB package supports automated SMT placement and meets MSL level 1 (260 °C reflow peak).
The SMBJ48CAHE3/52 is rated for 600 W peak pulse power under 10/1000 µs waveform with 0.01% duty cycle, and delivers 77.4 V clamping voltage at 7.8 A IPPM - enabling robust protection of 48 V nominal systems without forward conduction during normal operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - maximum continuous reverse operating voltage before clamping begins; defines system compatibility with 48 V rail |
| VBR min/max | 53.3 V / 58.9 V at 1 mA - guaranteed breakdown window ensures predictable turn-on margin above VWM |
| VC @ IPPM | 77.4 V at 7.8 A - clamping voltage limits downstream component stress during 10/1000 µs surge events |
| PPPM | 600 W - peak transient energy handling capacity per JEDEC standard waveform; enables single-device protection for moderate-energy surges |
| ID @ VWM | <1 µA - ultra-low reverse leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150 °C - extended junction temperature rating supports operation in high-ambient industrial environments |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height for PCB space efficiency |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated, solderable per J-STD-002 and JESD 22-B102. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (reverse bias) | One terminal of symmetrical junction; conducts during positive or negative overvoltage excursions relative to cathode |
| Cathode | Transient current exit (reverse bias) | Second terminal of symmetrical junction; completes bidirectional clamping path; no band marking on CA devices |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled or floating signal lines without polarity constraints; eliminates need for dual unidirectional devices |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for under-hood and infotainment applications |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 3 (1 kV/42 Ω) surges with margin; supports single-device protection for 48 V CAN, RS-485, or PoE interfaces |
| UL 497B recognized | Meets Underwriters Laboratories requirements for telecom and data line protectors (File E136766); simplifies end-equipment safety certification |
| MSL Level 1 | Zero moisture sensitivity; allows unlimited floor life and standard 260 °C reflow without baking - reduces manufacturing overhead |
Applications
| Industrial Motor Drives | Telecom Power Feeds |
|---|---|
Use Scenario: Protection of gate drivers and feedback sensing circuits against inductive kickback from 48 V BLDC motor controllers. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across half-bridge output or auxiliary supply rails. Use Value: Limits transient overshoot to ≤77.4 V, preventing MOSFET avalanche failure and maintaining control loop stability during commutation. |
Use Scenario: Surge suppression on −48 V DC telecom power distribution boards feeding remote radio units. IC Role / Device Role / Timing Role: Primary-level TVS on input bus prior to DC/DC converters and hot-swap controllers. Use Value: Absorbs up to 600 W of IEC 61000-4-5 surge energy without degradation, preserving upstream fuse coordination and converter reliability. |
| Automotive Body Control Modules | Industrial Sensor Signal Conditioning |
Use Scenario: Protection of LIN bus transceivers and LED driver outputs in AEC-Q101-compliant BCMs. IC Role / Device Role / Timing Role: Bidirectional clamp on 12 V/24 V supply lines and low-speed communication ports. Use Value: Leverages AEC-Q101 qualification and 150 °C TJ rating to meet automotive environmental stress requirements without derating. |
Use Scenario: Transient suppression on analog output lines (e.g., 4–20 mA, 0–10 V) from pressure or temperature sensors in factory automation. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) clamp placed at sensor transmitter PCB edge before cable connector. Use Value: Prevents measurement offset drift caused by leakage current while clamping lightning-induced surges to safe levels for precision ADC front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48CA-M3/52 | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification; same SMB package. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU public infrastructure projects). | Direct drop-in replacement when halogen-free bill-of-materials is required; no layout or validation changes needed. |
| SMAJ48CAHE3/A | Lower power rating (400 W vs. 600 W); SMA package (smaller footprint, higher RθJA = 140 °C/W); same VWM/VBR/VC specs. | Not suitable for high-energy surge environments (e.g., outdoor telecom); limited to lower-duty-cycle or space-constrained designs. | Use only where board area is critical and surge threat level is ≤400 W; verify thermal performance with reduced copper pad area. |
Compared with SMBJ48CAHE3/52, the M3/52 variant offers identical protection performance with halogen-free construction, while the SMAJ48CAHE3/A trades 33 % peak power capability and higher thermal resistance for 30 % smaller PCB footprint - requiring careful thermal and surge threat reassessment.
Availability
SMBJ48CAHE3/52 is available at Aetrix Electronics and suitable for industrial motor drives, telecom power feeds, automotive body control modules, and industrial sensor signal conditioning requiring stable component supply and long-term lifecycle support.
Supply support for SMBJ48CAHE3/52 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 qualification.
The SMBJ series is engineered for high-energy transient suppression in harsh environments, targeting industrial, automotive, and telecom applications where robustness, AEC-Q101 compliance, and UL recognition are mandatory.
FAQ
What does the "CA" suffix indicate in SMBJ48CAHE3/52?
The "CA" suffix denotes a bidirectional configuration - meaning SMBJ48CAHE3/52 provides symmetrical clamping for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SMBJ48A), it has no cathode marking and functions identically in either polarity, making it ideal for AC lines, differential buses, or floating references where polarity is undefined.
Is SMBJ48CAHE3/52 suitable for protecting a 48 V PoE++ (IEEE 802.3bt) interface?
Yes - SMBJ48CAHE3/52 is appropriate for secondary-side surge protection on 48 V PoE++ power pairs. Its 48 V VWM aligns with PoE++ Class 5–8 operating voltage, and its 77.4 V VC ensures downstream PD controller ICs remain below absolute maximum ratings during IEC 61000-4-5 surges. Confirm layout includes adequate copper pour for 7.8 A IPPM dissipation.
Does SMBJ48CAHE3/52 require derating at elevated ambient temperatures?
Yes - SMBJ48CAHE3/52 must be derated above TA = 25 °C per Figure 2 in Vishay document 88392. At 85 °C ambient, its peak pulse power drops to ~420 W (70 % of 600 W), and at 125 °C, it falls to ~240 W (40 %). Designers must verify worst-case surge energy remains within the derated PPPM curve for the intended operating environment.
How does the AEC-Q101 qualification of SMBJ48CAHE3/52 impact its use in non-automotive applications?
AEC-Q101 qualification certifies SMBJ48CAHE3/52 for extended temperature cycling, high-temperature reverse bias, and ESD robustness - providing design margin in industrial, telecom, and renewable energy applications exposed to thermal shock or high humidity. It does not restrict usage outside automotive; rather, it signals enhanced reliability for mission-critical deployments.
Can SMBJ48CAHE3/52 be used in parallel to increase surge current handling?
No - SMBJ48CAHE3/52 should not be paralleled without external balancing components. Minor VBR tolerances (±5.6 V across 53.3–58.9 V) cause uneven current sharing during transients, risking thermal runaway in one device. For higher IPPM, select a higher-power TVS (e.g., 1.5KE48CA) or use a TVS array with matched characteristics.
SMBJ48CAHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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):
- 7.8A
- Power - Peak Pulse:
- 600W
- 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-214AA (SMBJ)
SMBJ48CAHE3/52 FAQ
1.How can I place an order for SMBJ48CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48CAHE3/52 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 SMBJ48CAHE3/52 reliable?
The price and inventory of SMBJ48CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ48CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ48CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48CAHE3/52?
SMBJ48CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48CAHE3/52 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 SMBJ48CAHE3/52?
For technical support, including SMBJ48CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48CAHE3/52 requirements.
6.How does Aetrix verify that SMBJ48CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ48CAHE3/52 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 SMBJ48CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ48CAHE3/52?
All SMBJ48CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48CAHE3/52, 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 SMBJ48CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ48CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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