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Vishay General Semiconductor - Diodes Division SMBJ48CA-E3/52
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- Part No.:
- SMBJ48CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48CA-E3/52.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,794
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Product details
Overview
SMBJ48CA-E3/52 from Vishay General Semiconductor is a bidirectional surface-mount transient voltage suppressor (TVS) diode in the SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. 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, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on power rails and signal lines in industrial sensor interfaces.
For engineers reviewing the SMBJ48CA-E3/52 datasheet, SMBJ48CA-E3/52 pinout, SMBJ48CA-E3/52 application, or SMBJ48CA-E3/52 equivalent, key selection criteria include bidirectional clamping behavior, low clamping ratio (VC/VWM = 1.61), MSL Level 1 moisture sensitivity, and RoHS-compliant matte tin plating - critical for automotive-grade ESD/surge protection in space-constrained PCB layouts.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance regardless of transient polarity. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the 100 °C/W junction-to-ambient thermal resistance requires careful pad layout per Vishay's recommended 0.2" × 0.2" copper pads for rated 600 W surge handling.
The device meets ANSI/IEEE C62.35 standards for transient suppression and is qualified to AEC-Q101 when ordered with HE3/HM3 suffixes - though SMBJ48CA-E3/52 itself is commercial-grade. Its 0.103 %/°C temperature coefficient of VBR enables predictable voltage drift over -55 °C to +150 °C operating range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse working voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 53.3 V / 58.9 V at 1 mA - Confirmed breakdown range ensuring reliable turn-on during transients without premature conduction. |
| VC @ IPPM | 77.4 V at 7.8 A - Clamped voltage under 600 W 10/1000 µs surge; determines protected circuit's maximum stress level. |
| PPPM | 600 W - Peak pulse power capability with standardized waveform; validates single-event surge immunity per IEC 61000-4-5. |
| IPPM | 7.8 A - Peak pulse current corresponding to VC; used to size series impedance and verify PCB trace survivability. |
| TJ Range | -55 °C to +150 °C - Full operational junction temperature range; supports deployment in under-hood or industrial environments. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm max length, 4.06 mm max width, and 2.20 mm max height; optimized for automated placement. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Bidirectional construction means no polarity marking; terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient current path | Both terminals serve as bidirectional conduction paths; no cathode band marking - device functions identically in either orientation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns - reduces BOM count vs. dual unidirectional devices. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth, 2 kV line-line) when properly mounted on 5.0 mm × 5.0 mm copper pads. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes voltage overshoot during clamping - critical for protecting 48 V CAN FD or RS-485 transceivers with 80 V absolute max ratings. |
| MSL Level 1 rating | Allows unlimited floor life and reflow at peak 260 °C without baking - simplifies SMT manufacturing and eliminates moisture-related popcorning risk. |
| RoHS-compliant, halogen-free option | E3 suffix confirms compliance with EU RoHS Directive 2011/65/EU and JEDEC J-STD-20; supports green manufacturing requirements. |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
|
Use Scenario: Protecting 48 V supply inputs and analog sensor outputs (e.g., pressure, temperature) in factory automation PLCs against inductive switching spikes. IC Role / Device Role / Timing Role: Bidirectional TVS placed directly at connector entry point to shunt transients before reaching LDOs or ADC front-ends. Use Value: Prevents latch-up or permanent damage to 12-bit SAR ADCs and rail-to-rail op-amps by limiting input voltage to ≤77.4 V during 10/1000 µs surges. |
Use Scenario: Safeguarding LIN bus transceivers and door module microcontrollers from load dump and jump-start events in 48 V mild-hybrid architectures. IC Role / Device Role / Timing Role: Standoff-rated TVS on VBAT rail upstream of DC-DC converter, absorbing energy before it propagates to downstream ICs. Use Value: Maintains system uptime by surviving 60 V/100 ms load dump pulses without degradation - validated per ISO 7637-2 Pulse 5a. |
| Telecom Power Supply Input | Consumer Smart Home Hub |
|
Use Scenario: Secondary-side overvoltage protection on 48 V PoE++ (IEEE 802.3bt) power inputs feeding Ethernet switches and wireless access points. IC Role / Device Role / Timing Role: Clamp device located after primary DC-DC stage to protect PMICs and PHYs from reflected surges originating at cable interface. Use Value: Ensures <100 ns response time limits voltage excursion to safe levels for 3.3 V/5 V logic rails - verified via TLP testing. |
Use Scenario: ESD and surge protection on USB-C PD input and Zigbee/Z-Wave antenna feedlines in residential gateway devices. IC Role / Device Role / Timing Role: Bidirectional TVS applied across differential pairs and power rails to meet IEC 61000-4-2 Level 4 (±15 kV air) and IEC 61000-4-5. Use Value: Eliminates need for separate unidirectional devices on AC-coupled RF paths - reduces component count and board area by 33%. |
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 with identical electrical specs and SMB package; same 600 W PPPM, 77.4 V VC. | Required for halogen-free compliance programs (e.g., IPC-1752A); no change in surge performance or layout. | Select when environmental compliance mandates halogen-free materials without altering protection performance. |
| SMCJ48CA-E3/52 | Larger SMC (DO-214AB) package with 1500 W PPPM, same VWM/VBR/VC; 30% larger footprint, higher thermal mass. | Used where higher surge endurance is needed (e.g., outdoor telecom enclosures), but requires PCB redesign. | Choose only if 600 W is insufficient and board space allows SMC footprint; not drop-in compatible. |
Compared with SMBJ48CA-E3/52, the M3 variant offers identical protection with halogen-free construction, while the SMCJ48CA-E3/52 delivers 2.5× higher surge power in a non-compatible package - making the E3/52 optimal for cost- and space-constrained 48 V industrial designs requiring commercial-grade reliability.
Availability
SMBJ48CA-E3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom power supply inputs requiring stable component supply, full traceability, and consistent RoHS compliance across production batches.
Supply support for SMBJ48CA-E3/52 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, MOSFETs, optoelectronics, and passive components with emphasis on high-reliability, high-efficiency solutions.
The SMBJ series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for fast, repeatable transient suppression in harsh electromagnetic environments - targeting industrial automation, automotive subsystems, and infrastructure equipment.
FAQ
What is the clamping voltage of SMBJ48CA-E3/52 at its rated peak pulse current?
The SMBJ48CA-E3/52 has a maximum clamping voltage (VC) of 77.4 V at 7.8 A peak pulse current (IPPM) under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuits during surge events - critical for verifying compatibility with downstream ICs' absolute maximum ratings.
Is SMBJ48CA-E3/52 suitable for automotive applications?
SMBJ48CA-E3/52 is a commercial-grade device and not AEC-Q101 qualified. For automotive use, Vishay offers the SMBJ48CAHE3_B variant (with HE3 suffix), which carries full AEC-Q101 qualification. Engineers must select the HE3 or HM3 version explicitly for under-hood or safety-critical modules - the E3/52 variant lacks the required stress test validation.
How does the bidirectional design of SMBJ48CA-E3/52 affect its PCB layout?
The SMBJ48CA-E3/52 has no polarity marking and identical terminal behavior in both directions, allowing placement without orientation constraints. This simplifies layout on differential signal lines (e.g., RS-485, CAN FD) and eliminates risk of incorrect installation - unlike unidirectional TVS diodes that require strict cathode alignment relative to ground.
What is the thermal resistance of SMBJ48CA-E3/52, and how does it impact surge handling?
SMBJ48CA-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" copper pads. This value directly limits sustained power dissipation; for full 600 W surge capability, the device must be applied with proper copper area and airflow - derating applies above 25 °C ambient per Figure 2 in the datasheet.
Does SMBJ48CA-E3/52 meet any industry surge immunity standards?
Yes - SMBJ48CA-E3/52 is characterized per ANSI/IEEE C62.35 and supports compliance with IEC 61000-4-5 (surge immunity) and IEC 61000-4-2 (ESD) when implemented with appropriate PCB layout. Its 600 W peak pulse power and 77.4 V clamping enable pass-level protection for Level 4 (4 kV line-earth) testing in industrial and telecom applications.
SMBJ48CA-E3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ48CA-E3/52 FAQ
1.How can I place an order for SMBJ48CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48CA-E3/52 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 SMBJ48CA-E3/52 reliable?
The price and inventory of SMBJ48CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ48CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ48CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48CA-E3/52?
SMBJ48CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48CA-E3/52 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 SMBJ48CA-E3/52?
For technical support, including SMBJ48CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48CA-E3/52 requirements.
6.How does Aetrix verify that SMBJ48CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ48CA-E3/52 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 SMBJ48CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ48CA-E3/52?
All SMBJ48CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48CA-E3/52, 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 SMBJ48CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ48CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48CA-E3/52 Tags
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