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Vishay General Semiconductor - Diodes Division SMBJ48C-E3/5B
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- Part No.:
- SMBJ48C-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48C-E3/5B.pdf
- Description:
- TVS DIODE 48VWM 85.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,146
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Product details
Overview
SMBJ48C-E3/5B from Vishay General Semiconductor is a unidirectional 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 standoff voltage (VWM), 53.3–58.9 V breakdown range (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 SMBJ48C-E3/5B datasheet, SMBJ48C-E3/5B pinout, SMBJ48C-E3/5B application, or SMBJ48C-E3/5B equivalent, key selection criteria include verified unidirectional polarity, SMB package thermal resistance (RθJA = 100 °C/W), junction temperature limit of 150 °C, and compliance with UL 497B for surge protection systems.
Technical Context
This TVS diode operates as a fast-acting shunt clamp during overvoltage events, leveraging a glass-passivated silicon junction with sub-nanosecond response time. Its unidirectional configuration provides forward conduction only in one direction, with cathode band marking for polarity identification.
The device is rated for 600 W peak pulse power under 10/1000 µs waveform, derated above 25 °C per Fig. 2, and supports repetitive surge duty cycle of 0.01 %. It meets MSL Level 1 per J-STD-020 and withstands 100 A non-repetitive forward surge (IFSM) for 8.3 ms half-sine wave.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 48 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (Breakdown Voltage) | 53.3–58.9 V at 1 mA - Confirmed minimum/maximum threshold where avalanche conduction initiates reliably. |
| VC (Clamping Voltage) | 77.4 V at IPPM = 7.8 A - Peak voltage seen by protected circuit during 10/1000 µs transient; determines stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy-handling capability under standardized surge waveform; validates robustness against lightning or inductive switching. |
| IPPM (Peak Pulse Current) | 7.8 A - Maximum surge current the device safely diverts without degradation; derived from VC and PPPM. |
| TJmax | 150 °C - Maximum allowable junction temperature; sets thermal design limits for PCB copper pad area and ambient conditions. |
| RθJA | 100 °C/W - Thermal resistance from junction to ambient on standard 0.2" × 0.2" copper pads; critical for power dissipation planning. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity marked by cathode band on unidirectional types.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse voltage reference | Connected to lower-potential side of protected line; defines directionality of clamping action. |
| Cathode | Forward current exit / Clamping node | Marked with band; tied to higher-potential rail (e.g., VCC or signal line); conducts during overvoltage to shunt energy. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validated energy absorption capacity for IEC 61000-4-5 Level 4 surge immunity in industrial equipment. |
| 77.4 V clamping at 7.8 A | Ensures protected ICs (e.g., 5 V or 48 V logic rails) remain below absolute maximum ratings during transients. |
| Glass passivated junction | Improves long-term reliability and stability of VBR under thermal cycling and humidity exposure. |
| MSL Level 1 (260 °C peak reflow) | Enables compatibility with standard lead-free SMT assembly processes without pre-baking. |
| UL 497B recognition (QVGQ2) | Confirms suitability for use in telecom and industrial surge protective devices requiring safety certification. |
Applications
| Industrial Motor Drive Protection | 48 V DC Power Rail Protection |
|---|---|
|
Use Scenario: Suppresses inductive kickback from relay coils and H-bridge MOSFET switching in PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed across DC bus or gate drive lines to limit voltage spikes to safe levels. Use Value: Prevents gate oxide rupture in 60 V-rated MOSFETs by clamping transients to ≤77.4 V, extending system MTBF. |
Use Scenario: Protects 48 V input stages of PoE-powered switches and base station power converters from load dump surges. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between VIN and GND to absorb 600 W pulses without failure. Use Value: Maintains 48 V system integrity during ISO 16750-2 load dump tests by limiting clamped voltage within 1.6× VWM. |
| Automotive Body Control Module (BCM) | Sensor Signal Line Protection |
|
Use Scenario: Safeguards microcontroller I/O pins and CAN transceivers in BCMs exposed to battery line transients. IC Role / Device Role / Timing Role: Unidirectional TVS on 12 V/48 V supply inputs to meet AEC-Q101 stress requirements (when HE3 variant selected). Use Value: Enables compliance with ISO 7637-2 Pulse 1/2a/5a test profiles while maintaining RoHS-compliant commercial-grade sourcing via E3 suffix. |
Use Scenario: Shields analog outputs of pressure/temperature sensors in HVAC control units from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF typical at 0 V) unidirectional clamp on 0–5 V or 0–10 V signal paths. Use Value: Limits transient-induced offset error to <1 % full-scale by clamping within 1 ns, preserving measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48A-E3/5B | Same VWM, VBR, VC, and package; identical electrical specs per Vishay doc #88392. | No functional difference; "A" and "C" suffixes both denote unidirectional variants in this family. | Select SMBJ48A-E3/5B if legacy BOM references "A" suffix; SMBJ48C-E3/5B is functionally interchangeable. |
| SMCJ48A-E3/57T | Higher 1500 W PPPM, larger SMC (DO-214AB) package, RθJA = 35 °C/W - requires more PCB area but handles 2.5× surge energy. | Better suited for high-energy automotive load dump or industrial AC line protection where 600 W is marginal. | Choose SMCJ48A-E3/57T only when surge energy exceeds SMBJ48C-E3/5B's 600 W rating; not drop-in due to footprint change. |
Compared with SMBJ48A-E3/5B, SMBJ48C-E3/5B offers identical protection performance in the same SMB footprint; versus SMCJ48A-E3/57T, it trades surge margin for space-constrained designs where 600 W suffices and board real estate is limited.
Availability
SMBJ48C-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, 48 V DC power systems, and automotive body control modules requiring stable component supply with RoHS-compliant commercial-grade assurance.
Supply support for SMBJ48C-E3/5B 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, and protection devices with emphasis on reliability, precision, and application-specific validation.
The SMBJ series was developed for high-reliability transient suppression in space-constrained industrial and automotive environments, balancing 600 W surge capability with SMB package manufacturability and thermal performance.
FAQ
What is the polarity configuration of SMBJ48C-E3/5B?
SMBJ48C-E3/5B is a unidirectional TVS diode, with cathode identified by a visible band on the SMB package body. It conducts in forward bias like a standard diode and clamps reverse transients above VBR. This configuration is appropriate for DC power line protection where polarity is fixed, unlike bidirectional variants (e.g., SMBJ48CA) used on AC or differential signal lines. The SMBJ48C-E3/5B datasheet confirms unidirectional operation in Table 1 and Mechanical Data section.
Does SMBJ48C-E3/5B meet automotive qualification standards?
SMBJ48C-E3/5B itself is RoHS-compliant commercial grade (E3 suffix), not AEC-Q101 qualified. For automotive applications, Vishay offers the SMBJ48CHE3 variant (HE3 suffix), which adds AEC-Q101 qualification while retaining identical electrical specs and SMB packaging. Engineers must specify HE3 or HM3 suffixes for automotive-grade versions; SMBJ48C-E3/5B is intended for industrial and consumer use where AEC-Q101 is not mandated.
What is the maximum clamping voltage of SMBJ48C-E3/5B under surge conditions?
The maximum clamping voltage (VC) of SMBJ48C-E3/5B is 77.4 V, measured at peak pulse current (IPPM) of 7.8 A using the 10/1000 µs waveform. This value is specified in the Electrical Characteristics table (Document #88392, page 2) and represents the worst-case voltage imposed on the protected circuit during a standardized surge event. It ensures downstream 48 V-rated components remain within safe operating limits.
How does SMBJ48C-E3/5B compare to SMAJ48A in terms of surge handling?
SMBJ48C-E3/5B delivers 600 W peak pulse power, whereas SMAJ48A is rated for only 400 W in the smaller SMA (DO-214AC) package. The SMBJ48C-E3/5B's larger SMB footprint enables higher surge energy absorption and lower thermal resistance (RθJA = 100 °C/W vs. ~140 °C/W for SMAJ), making it preferable for applications demanding sustained transient immunity. Both share identical VWM and VC, but SMBJ48C-E3/5B offers superior robustness without changing circuit topology.
Is SMBJ48C-E3/5B compatible with lead-free reflow soldering processes?
Yes, SMBJ48C-E3/5B meets J-STD-020 MSL Level 1 with a maximum peak reflow temperature of 260 °C, fully supporting standard lead-free (SnAgCu) soldering profiles. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 for solderability, and the molding compound satisfies UL 94 V-0 flammability requirements. No pre-baking is required prior to assembly, simplifying manufacturing flow for SMBJ48C-E3/5B integration.
SMBJ48C-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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):
- 7A
- 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)
SMBJ48C-E3/5B FAQ
1.How can I place an order for SMBJ48C-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48C-E3/5B 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 SMBJ48C-E3/5B reliable?
The price and inventory of SMBJ48C-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ48C-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ48C-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48C-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48C-E3/5B?
SMBJ48C-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48C-E3/5B 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 SMBJ48C-E3/5B?
For technical support, including SMBJ48C-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48C-E3/5B requirements.
6.How does Aetrix verify that SMBJ48C-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ48C-E3/5B 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 SMBJ48C-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ48C-E3/5B?
All SMBJ48C-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48C-E3/5B, 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 SMBJ48C-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ48C-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48C-E3/5B Tags
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