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Vishay General Semiconductor - Diodes Division SMBG48AHE3/5B
- Part No.:
- SMBG48AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG48AHE3/5B.pdf
- Description:
- TVS DIODE 48VWM 77.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,377
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Product details
Overview
SMBG48AHE3/5B from Vishay General Semiconductor is a unidirectional surface-mount TransZORB® transient voltage suppressor in SMBG (DO-215AA) package, with 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR at 1 mA), 7.8 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs). It protects MOSFETs and ICs against inductive switching transients in automotive powertrain control modules.
For engineers reviewing the SMBG48AHE3/5B datasheet, SMBG48AHE3/5B pinout, SMBG48AHE3/5B application, or SMBG48AHE3/5B equivalent, key selection criteria include clamping voltage (77.4 V at IPPM), AEC-Q101 qualification, RoHS-compliant HE3 suffix, and 150 °C maximum junction temperature for under-hood deployment.
Technical Context
This device operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds VBR, clamping transients to ≤77.4 V at 7.8 A. Its glass-passivated junction ensures stable breakdown and low leakage (<1.0 µA at 48 V).
Designed for high-reliability automotive environments, SMBG48AHE3/5B meets MSL Level 1 (260 °C reflow), supports 100 A non-repetitive forward surge (8.3 ms half-sine), and exhibits 20 °C/W junction-to-lead thermal resistance for effective PCB heat dissipation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 53.3 V / 58.9 V at 1 mA - Ensures reliable turn-on within defined tolerance band for consistent protection threshold |
| IPPM | 7.8 A (10/1000 µs) - Peak transient current it safely shunts without failure |
| VC | 77.4 V at IPPM - Clamped voltage seen by protected circuit during worst-case surge |
| TJ max | +150 °C - Enables operation in engine compartment environments with minimal derating |
| Package | SMBG (DO-215AA) - Surface-mount footprint compatible with automated placement and 0.2" × 0.2" copper pad layout |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Two-terminal unidirectional TVS in SMBG (DO-215AA) package: cathode marked with band; anode unmarked. 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 |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VREV > VBR |
| Anode | Reference/ground return | Typically tied to system ground plane; completes clamping path during overvoltage event |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Handles high-energy transients common in 12 V/24 V automotive power nets without degradation |
| AEC-Q101 qualified | Validated for automotive under-hood use including temperature cycling, humidity, and mechanical shock |
| HE3 suffix | RoHS-compliant, AEC-Q101 qualified variant with matte tin-plated leads meeting J-STD-002 solderability |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a/5a) |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without preconditioning or baking |
Applications
| Automotive Powertrain Control | Industrial Motor Drive Protection |
|---|---|
Use Scenario: Suppresses load-dump and inductive kickback transients on 12 V supply rails feeding engine control units (ECUs) and transmission control modules (TCMs). IC Role / Device Role: Unidirectional TVS placed between battery rail and ground, clamping surges to protect downstream DC-DC converters and microcontrollers. Use Value: Limits clamped voltage to 77.4 V, staying below 80 V absolute maximum rating of typical automotive-grade PMICs and MCUs. | Use Scenario: Protects gate drivers and current-sense amplifiers in variable-frequency drives subjected to relay contact bounce and coil de-energization spikes. IC Role / Device Role: Mounted across motor phase inputs to clamp commutation-induced voltage spikes before they reach IGBT gate oxide or op-amp inputs. Use Value: Withstands 100 A single-half-sine forward surge (8.3 ms), enabling robust protection during repeated motor start-stop cycles. |
| Telecom Power Interface | Automotive Body Electronics |
Use Scenario: Shields 48 V telecom power entry circuits from lightning-induced surges and hot-swap transients in base station power supplies. IC Role / Device Role: Primary-level TVS on input stage of DC-DC front-end, coordinated with upstream MOVs and secondary-stage TVS arrays. Use Value: 600 W peak pulse rating and 77.4 V clamping support compliance with ITU-T K.20/21 immunity requirements for central office equipment. | Use Scenario: Safeguards LIN bus transceivers and LED driver ICs in door modules and seat controllers exposed to battery disconnect transients. IC Role / Device Role: Placed on VCC rail upstream of linear regulators, providing fast-response clamping ahead of bulk capacitance. Use Value: 1.0 µA max reverse leakage at 48 V ensures negligible quiescent current impact on always-on vehicle networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG48AHM3/5B | Halogen-free, RoHS-compliant, AEC-Q101 qualified - identical electrical specs, different material composition | No functional difference; selected where halogen-free BOM compliance is mandated | Choose SMBG48AHM3/5B only if halogen-free certification is required by OEM or regulatory body |
| SMBJ48AHE3/5B | Same VWM/VBR/VC, but SMB (DO-214AA) package - larger footprint, higher IPPM (13.9 A), same 600 W rating | Higher surge margin and thermal mass; suited for higher-power industrial designs where board space allows | Select SMBJ48AHE3/5B when surge current headroom >7.8 A or thermal performance beyond SMBG's RθJL = 20 °C/W is needed |
Compared with SMBG48AHE3/5B, SMBG48AHM3/5B offers identical protection performance with halogen-free materials, while SMBJ48AHE3/5B trades compact SMBG size for higher surge current capability and improved thermal handling in less space-constrained layouts.
Availability
SMBG48AHE3/5B is available at Aetrix Electronics and suitable for automotive powertrain control, industrial motor drive protection, and telecom power interface applications requiring stable component supply, AEC-Q101 validation, and RoHS-compliant sourcing.
Supply support for SMBG48AHE3/5B 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, TVS, MOSFETs, and optoelectronics for industrial, automotive, and computing markets.
The SMBG TransZORB® series was developed specifically for high-reliability surface-mount transient suppression in space-constrained automotive and industrial systems, emphasizing AEC-Q101 qualification, low-profile packaging, and repeatable clamping performance.
FAQ
What is the clamping voltage of SMBG48AHE3/5B at its rated peak pulse current?
The SMBG48AHE3/5B has a maximum clamping voltage (VC) of 77.4 V when subjected to its rated 7.8 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per Figure 1 in Vishay document 88456 and defines the upper voltage limit imposed on protected circuitry during surge events.
Is SMBG48AHE3/5B suitable for automotive under-hood applications?
Yes, SMBG48AHE3/5B is AEC-Q101 qualified and rated for operation from –55 °C to +150 °C junction temperature. Its glass-passivated junction, MSL Level 1 reflow compatibility, and validated performance under temperature cycling and humidity stress make it suitable for engine control units, transmission modules, and other under-hood automotive systems.
What does the "HE3" suffix indicate in SMBG48AHE3/5B?
The "HE3" suffix denotes that SMBG48AHE3/5B is RoHS-compliant, AEC-Q101 qualified, and features matte tin-plated leads meeting J-STD-002 solderability standards. It distinguishes this variant from industrial-grade E3 (RoHS only) and HM3 (halogen-free + AEC-Q101) versions.
How does SMBG48AHE3/5B differ from bidirectional variants like SMBG48CA?
SMBG48AHE3/5B is unidirectional and includes a cathode band marking; SMBG48CA is bidirectional with no polarity marking and symmetrical breakdown in both directions. The unidirectional SMBG48AHE3/5B provides lower forward voltage drop and is preferred for DC rail protection, whereas SMBG48CA suits AC-coupled or floating signal line protection.
What is the recommended PCB pad layout for SMBG48AHE3/5B?
Vishay specifies a minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad area for each terminal of SMBG48AHE3/5B to ensure adequate thermal dissipation and mechanical reliability. This layout supports the device's 20 °C/W junction-to-lead thermal resistance and maintains performance under repetitive surge conditions.
SMBG48AHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- 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 (SMBG)
SMBG48AHE3/5B FAQ
1.How can I place an order for SMBG48AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG48AHE3/5B 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 SMBG48AHE3/5B reliable?
The price and inventory of SMBG48AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG48AHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG48AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG48AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG48AHE3/5B?
SMBG48AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG48AHE3/5B 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 SMBG48AHE3/5B?
For technical support, including SMBG48AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG48AHE3/5B requirements.
6.How does Aetrix verify that SMBG48AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG48AHE3/5B 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 SMBG48AHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG48AHE3/5B?
All SMBG48AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG48AHE3/5B, 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 SMBG48AHE3/5B part is unused and in its original packaging.
Return procedure for SMBG48AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG48AHE3/5B Tags
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