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Vishay General Semiconductor - Diodes Division SMBJ48CA-M3/52
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- Part No.:
- SMBJ48CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48CA-M3/52.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,302
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Product details
Overview
SMBJ48CA-M3/52 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, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ48CA-M3/52 datasheet, SMBJ48CA-M3/52 pinout, SMBJ48CA-M3/52 application, or SMBJ48CA-M3/52 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.61), halogen-free RoHS-compliant construction (M3 suffix), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both directions, enabling protection of AC-coupled or floating signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown behavior and low leakage (<1.0 µA at VWM), while the 100 °C/W junction-to-ambient thermal resistance requires careful PCB copper pad design for sustained surge handling.
The device meets J-STD-020 MSL Level 1 and withstands peak reflow temperatures up to 260 °C. With a 0.01 % duty cycle limit for repetitive 10/1000 µs pulses and a 150 °C maximum junction temperature, it supports transient suppression in automotive-grade commercial applications when paired with appropriate layout practices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating range for protected circuitry. |
| VBR (min/max) | 53.3 V / 58.9 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | 77.4 V at 7.8 A - Clamped voltage seen by downstream components during 600 W transient; determines residual stress on protected ICs. |
| PPPM | 600 W - Peak pulse power dissipation capability with 10/1000 µs waveform; defines transient energy absorption capacity. |
| IPPM | 7.8 A - Peak pulse current corresponding to VC; used to size series impedance and verify PCB trace current handling. |
| TJ max. | +150 °C - Maximum junction temperature; sets thermal derating limits for repeated surge events above 25 °C ambient. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with JEDEC-standard pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are symmetrical; device functions identically regardless of orientation in circuit.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (either end) | Transient current entry point in negative half-cycle | Accepts reverse surge current during negative-going transients; connects to line being protected. |
| Cathode (either end) | Transient current entry point in positive half-cycle | Accepts reverse surge current during positive-going transients; connects to same line as anode - bidirectional symmetry eliminates orientation dependency. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals or ungrounded buses without polarity constraints or external diode pairing. |
| 600 W peak pulse power | Handles high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) on 12 V/24 V systems with minimal voltage overshoot. |
| Halogen-free & RoHS-compliant (M3) | Meets environmental compliance requirements for industrial and consumer electronics without compromising surge robustness. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard reflow processing without baking; reduces manufacturing overhead and risk of popcorning. |
| Low clamping ratio (VC/VWM = 1.61) | Minimizes voltage stress on downstream components during clamping - critical for 48 V-rated logic and gate drivers. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of H-bridge gate driver inputs against inductive kickback from 48 V BLDC motor windings. IC Role / Device Role: Bidirectional transient clamp placed across driver supply rails and signal lines. Use Value: Limits voltage excursions to ≤77.4 V during 7.8 A surges, preventing latch-up or oxide breakdown in 50 V-rated CMOS drivers. |
Use Scenario: Surge suppression on LIN bus lines exposed to load dump and battery reversal in BCM subassemblies. IC Role / Device Role: Line-referenced TVS connected between LIN data line and ground. Use Value: Maintains signal integrity under ISO 16750-2 test conditions by clamping transients within ±77.4 V window without polarity biasing. |
| Telecom Power Supply Inputs | Industrial Sensor Signal Conditioning |
|
Use Scenario: Input-stage protection for 48 V telecom rectifier modules subject to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role: Primary-level TVS mounted at DC input connector before bulk capacitance. Use Value: Absorbs 600 W pulses without degradation, preserving upstream fuse coordination and avoiding false trips during surge events. |
Use Scenario: Protection of analog front-end inputs (e.g., 4–20 mA loop receivers) in factory automation sensors. IC Role / Device Role: Differential-mode clamp across signal pair and common-mode clamp from each line to chassis ground. Use Value: Prevents ESD damage (IEC 61000-4-2 Level 4) and switching noise coupling with <1.0 µA leakage at 48 V operating point. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48CA-E3/52 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3). | Preferred for non-halogen-restricted commercial designs where cost optimization is prioritized. | Select when halogen-free requirement is absent and standard RoHS compliance suffices. |
| SAC48CA | Same VWM and VC, but in smaller SOD-123 package (lower PPPM = 400 W). | Limited to lower-energy transients; unsuitable for 600 W IEC 61000-4-5 testing. | Choose only for space-constrained, low-surge environments where 400 W rating is sufficient. |
Compared with SMBJ48CA-M3/52, the E3 variant offers identical protection performance with relaxed material content, while SAC48CA trades package size for reduced surge capacity - making SMBJ48CA-M3/52 the optimal choice for full 600 W compliance-critical 48 V systems.
Availability
SMBJ48CA-M3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supplies, and industrial sensor signal conditioning requiring stable component supply and halogen-free compliance.
Supply support for SMBJ48CA-M3/52 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 and application-specific performance.
The SMBJ series is engineered for robust transient suppression in harsh environments, targeting automotive, industrial, and telecom applications where high pulse power and stable clamping are mandatory.
FAQ
What is the clamping voltage of SMBJ48CA-M3/52 at its rated peak pulse current?
The SMBJ48CA-M3/52 has a maximum clamping voltage (VC) of 77.4 V at 7.8 A peak pulse current (IPPM) under 10/1000 µs waveform conditions. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ48CA-M3/52 maintains this clamping performance across its specified operating temperature range.
Is SMBJ48CA-M3/52 suitable for automotive applications?
SMBJ48CA-M3/52 is qualified to AEC-Q101 when ordered with HE3 or HM3 suffixes; the M3/52 variant is commercial-grade and not AEC-Q101 certified. For automotive use, specify SMBJ48CA-HM3/52 to ensure qualification. The SMBJ48CA-M3/52 remains suitable for non-safety-critical automotive subsystems where AEC-Q101 is not mandated, such as infotainment power rails.
What does the "CA" suffix indicate in SMBJ48CA-M3/52?
The "CA" suffix in SMBJ48CA-M3/52 denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities without requiring orientation during placement. This distinguishes it from unidirectional variants (e.g., SMBJ48A), which have a cathode band and conduct only in reverse bias. The SMBJ48CA-M3/52 leverages this symmetry for AC line and floating-bus protection.
How does the M3 suffix affect the material composition of SMBJ48CA-M3/52?
The M3 suffix indicates that SMBJ48CA-M3/52 is halogen-free and RoHS-compliant, meeting IEC 61249-2-21 requirements for bromine and chlorine content. This differs from the E3 suffix (RoHS-compliant but not halogen-free) and supports compliance in markets with strict halogen restrictions, such as certain EU industrial equipment standards. The SMBJ48CA-M3/52 retains identical electrical performance to E3 variants.
What is the thermal resistance of SMBJ48CA-M3/52, and how does it impact layout?
SMBJ48CA-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value assumes minimum recommended pad layout; reducing pad area increases RθJA, limiting repetitive surge capability. For high-duty-cycle applications, designers must verify thermal rise using SMBJ48CA-M3/52's 5.0 W steady-state power dissipation rating and ambient temperature constraints.
SMBJ48CA-M3/52 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-M3/52 FAQ
1.How can I place an order for SMBJ48CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48CA-M3/52 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-M3/52 reliable?
The price and inventory of SMBJ48CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ48CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ48CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48CA-M3/52?
SMBJ48CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48CA-M3/52 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-M3/52?
For technical support, including SMBJ48CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48CA-M3/52 requirements.
6.How does Aetrix verify that SMBJ48CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ48CA-M3/52 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-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ48CA-M3/52?
All SMBJ48CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48CA-M3/52, 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-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ48CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48CA-M3/52 Tags
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