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Vishay General Semiconductor - Diodes Division SMBJ48CHE3/52
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- Part No.:
- SMBJ48CHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48CHE3/52.pdf
- Description:
- TVS DIODE 48VWM 85.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,157
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Product details
Overview
SMBJ48CHE3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of DC power rails 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 - deployed in automotive ECUs, industrial I/O modules, and telecom power supplies.
For engineers reviewing the SMBJ48CHE3/52 datasheet, SMBJ48CHE3/52 pinout, SMBJ48CHE3/52 application, or SMBJ48CHE3/52 equivalent, key selection criteria include clamping performance under 7.8 A surge, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), unidirectional polarity marking, and compatibility with automated SMT placement on 0.2" × 0.2" copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when transient voltage exceeds VBR, it avalanches into low-impedance conduction to divert surge current away from downstream ICs or MOSFETs. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 µA at 48 V).
Designed for single-polarity DC systems, SMBJ48CHE3/52 uses cathode-band polarity identification and delivers fast response (<1 ns), low incremental surge resistance, and repeatable clamping across 0.01% duty cycle pulses - validated per ANSI/IEEE C62.35 and UL 497B (QVGQ2 recognition).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected circuit's nominal DC rail. |
| VBR (min/max) | 53.3 V / 58.9 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on above system overvoltage margin. |
| VC @ IPPM | 77.4 V at 7.8 A - Clamped voltage during 10/1000 µs surge; defines worst-case stress seen by protected load. |
| PPPM | 600 W - Peak pulse power handling capability; supports high-energy transients like ISO 7637-2 Pulse 1/2a/5a in automotive. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood or industrial ambient up to +125 °C with derating. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on standard 0.2" × 0.2" pads; informs PCB copper area requirements for thermal management. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD; suffix "HE3" confirms qualification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Cathode identified by black band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line; conducts avalanche current to ground during overvoltage events. |
| Anode (unbanded end) | Reference/return path | Typically tied to system ground or lower-potential rail; completes shunt path for transient energy dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against high-energy transients such as inductive switch-off spikes in 24 V automotive systems. |
| AEC-Q101 qualified (HE3 suffix) | Guarantees automotive-grade reliability for engine control, ADAS, and body electronics without additional qualification effort. |
| Low clamping ratio (VC/VWM ≈ 1.61) | Minimizes overvoltage stress on downstream components while maintaining margin above 48 V nominal rail. |
| MSL Level 1 (260 °C reflow) | Supports lead-free soldering without moisture sensitivity concerns; eliminates bake requirement prior to assembly. |
| Glass-passivated junction | Ensures stable VBR over time and temperature, low leakage (<1 µA), and resistance to humidity-induced degradation. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 48 V battery-supplied ECUs from load dump and alternator transients per ISO 7637-2. IC Role / Device Role / Timing Role: Shunt-type transient suppressor placed directly across input terminals of DC-DC converters or microcontrollers. Use Value: Limits voltage excursion to ≤77.4 V during 7.8 A surges, preventing latch-up or gate oxide damage in downstream SiC MOSFET drivers. |
Use Scenario: Safeguarding analog front-end inputs of pressure/temperature sensors in PLC I/O modules exposed to field wiring surges. IC Role / Device Role / Timing Role: Unidirectional clamp on sensor supply line (VS) referenced to local ground plane. Use Value: Maintains signal integrity by clamping induced transients below ADC input absolute maximum ratings while adding <1 pF capacitance. |
| Telecom DC Power Input Protection | Motor Drive Gate Driver Supply Clamp |
|
Use Scenario: Securing -48 V telecom rectifier outputs against lightning-induced surges entering central office equipment. IC Role / Device Role / Timing Role: Reverse-biased TVS on negative rail relative to chassis ground; cathode tied to -48 V line. Use Value: Withstands repetitive 600 W pulses without degradation, meeting GR-1089-CORE immunity requirements for Class B equipment. |
Use Scenario: Clamping bootstrap supply rails in half-bridge motor drivers subject to shoot-through-induced voltage spikes. IC Role / Device Role / Timing Role: Fast-response shunt device across high-side gate driver VBS capacitor to suppress ringing overshoot. Use Value: Sub-ns response and 77.4 V clamping prevent unintended high-side IGBT/MOSFET turn-on during switching transitions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48AHE3/52 | Same electrical specs and AEC-Q101 qualification; identical marking code "MX" and packaging - functionally identical part number variant. | No functional difference; used interchangeably in automotive designs requiring HE3 suffix compliance. | Select SMBJ48AHE3/52 if procurement system requires explicit "A" suffix for unidirectional designation per Vishay ordering convention. |
| SMCJ48AHE3/52 | Same VWM/VC but higher PPPM (1500 W) and larger SMC (DO-214AB) package; RθJA = 40 °C/W vs. 100 °C/W. | Better thermal performance and surge margin, but requires larger PCB footprint and may not fit space-constrained layouts. | Choose SMCJ48AHE3/52 only when system-level testing shows 600 W insufficient - e.g., in heavy-duty industrial motor drives with frequent switching surges. |
Compared with SMBJ48AHE3/52 (identical spec twin) and SMCJ48AHE3/52 (higher-power SMC variant), SMBJ48CHE3/52 offers optimal balance of AEC-Q101 compliance, 600 W surge capacity, and compact SMB footprint for cost- and space-sensitive automotive and industrial power rail protection.
Availability
SMBJ48CHE3/52 is available at Aetrix Electronics and suitable for automotive ECUs, industrial I/O modules, and telecom power supplies requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant manufacturing.
Supply support for SMBJ48CHE3/52 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, efficiency, and application-specific optimization.
The SMBJ series is engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness against ESD, EFT, and surge events is mission-critical.
FAQ
What is the clamping voltage of SMBJ48CHE3/52 and how is it measured?
The SMBJ48CHE3/52 has a maximum clamping voltage (VC) of 77.4 V, measured at a peak pulse current (IPPM) of 7.8 A using a standardized 10/1000 µs double-exponential waveform. This value represents the highest voltage the device allows across its terminals during a transient event, ensuring protected circuits remain within safe operating limits. The test condition is defined in ANSI/IEEE C62.35 and verified per Vishay Document Number 88392.
Is SMBJ48CHE3/52 suitable for automotive applications?
Yes, SMBJ48CHE3/52 is AEC-Q101 qualified, as confirmed by the "HE3" suffix and Vishay's documentation (Rev. 09-Jan-2024, Doc. 88392). It meets stress tests including high-temperature operating life, temperature cycling, and unbiased HAST - making it appropriate for under-hood and chassis-mounted automotive electronics such as body control modules and ADAS power supplies.
What does the "HE3" suffix indicate in SMBJ48CHE3/52?
The "HE3" suffix in SMBJ48CHE3/52 denotes RoHS-compliant construction with AEC-Q101 qualification and halogen-free molding compound. It distinguishes this automotive-grade variant from commercial "E3" (RoHS only) or "M3" (halogen-free, RoHS) versions. The "HE3" marking ensures full compliance with automotive reliability standards and material restrictions required by Tier 1 suppliers.
How does SMBJ48CHE3/52 differ from SMBJ48AHE3/52?
SMBJ48CHE3/52 and SMBJ48AHE3/52 are functionally identical: same VWM (48 V), VBR (53.3–58.9 V), VC (77.4 V), PPPM (600 W), package (SMB), and AEC-Q101 qualification. The "C" vs. "A" suffix reflects Vishay's internal revision or marking code variation - both share the "MX" device marking and are interchangeable in design and procurement per Vishay's ordering information table.
What is the thermal resistance of SMBJ48CHE3/52 and how does it affect layout?
SMBJ48CHE3/52 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 guides PCB layout: to maintain TJ ≤ 150 °C under worst-case 5.0 W steady-state dissipation, designers must ensure adequate copper area and consider airflow or adjacent heat sources - underscoring why the device is rated for pulsed, not continuous, power handling.
SMBJ48CHE3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ48CHE3/52 FAQ
1.How can I place an order for SMBJ48CHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48CHE3/52 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 SMBJ48CHE3/52 reliable?
The price and inventory of SMBJ48CHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ48CHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ48CHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48CHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48CHE3/52?
SMBJ48CHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48CHE3/52 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 SMBJ48CHE3/52?
For technical support, including SMBJ48CHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48CHE3/52 requirements.
6.How does Aetrix verify that SMBJ48CHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ48CHE3/52 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 SMBJ48CHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ48CHE3/52?
All SMBJ48CHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48CHE3/52, 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 SMBJ48CHE3/52 part is unused and in its original packaging.
Return procedure for SMBJ48CHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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