My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ48CAHE3_B/H
- Part No.:
- SMBJ48CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ48CAHE3_B/H.pdf
- Description:
- 600W,48V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:4,079
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ48CAHE3_B/H 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 48 V standoff voltage (VWM), 77.4 V maximum clamping voltage (VC) at 7.8 A peak pulse current (IPPM), and 600 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ48CAHE3_B/H datasheet, SMBJ48CAHE3_B/H pinout, SMBJ48CAHE3_B/H application, or SMBJ48CAHE3_B/H equivalent, this device is evaluated for ESD and surge immunity in bidirectional DC rails, automotive body electronics, and I/O port protection where low-leakage (<1 µA at VWM), fast response (<1 ns), and AEC-Q101 qualification are critical selection criteria.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with breakdown voltage (VBR) ranging from 53.3 V to 58.9 V at 1 mA test current and clamping within 77.4 V at rated 7.8 A surge. Its glass-passivated junction ensures stable avalanche characteristics and low incremental surge resistance.
Thermal design relies on RθJA = 100 °C/W and RθJL = 20 °C/W, requiring minimum 0.2" × 0.2" copper pads per terminal for full 600 W rating. The device meets MSL Level 1 (JEDEC J-STD-020) and is qualified to AEC-Q101 for automotive underhood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before conduction begins; defines safe working range for protected circuit. |
| VBR min/max | 53.3 V / 58.9 V at 1 mA - Confirmed bidirectional breakdown window; ensures predictable turn-on during overvoltage events. |
| VC @ IPPM | 77.4 V at 7.8 A - Clamped voltage seen by downstream ICs during 10/1000 µs surge; limits stress on 5V–48V logic and interface circuits. |
| PPPM | 600 W - Peak transient energy absorption capability with standard 10/1000 µs waveform; supports IEC 61000-4-5 Level 3/4 compliance. |
| ID @ VWM | <1 µA - Ultra-low leakage at rated standoff; avoids loading of high-impedance sensor bias networks or battery-powered nodes. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive and industrial ambient environments. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place and reflow soldering. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration - no polarity marking; symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode / Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no fixed polarity required in layout. |
| Terminal 2 | Anode / Cathode (bidirectional) | Paired terminal completing symmetrical clamping path; enables protection of AC-coupled or floating lines without orientation constraints. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals, differential buses (e.g., RS-485), and ungrounded DC rails without polarity concerns. |
| AEC-Q101 qualification | Validated for automotive applications including body control modules and infotainment power supplies where reliability over temperature and lifetime is mandated. |
| 600 W peak pulse power | Withstands repetitive 10/1000 µs surges up to 0.01% duty cycle - sufficient for ISO 7637-2 Pulse 1/2/5a and IEC 61000-4-5 Combination Wave testing. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes voltage overshoot during transients - critical for safeguarding 48 V automotive ECUs and industrial PLC I/O stages. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life before reflow; eliminates baking requirements and simplifies SMT manufacturing flow. |
Applications
| Automotive Body Control Module (BCM) Power Input | Industrial RS-485 Data Line Protection |
|---|---|
Use Scenario: Protects 48 V supply rail in BCM against load dump and alternator ripple transients per ISO 7637-2. IC Role / Device Role / Timing Role: Bidirectional TVS clamps positive and negative spikes faster than system response time, preventing latch-up in PMICs and microcontrollers. Use Value: Withstands 600 W surges while limiting clamped voltage to 77.4 V - below absolute maximum ratings of common 48 V-rated DC-DC controllers. |
Use Scenario: Shields RS-485 transceivers from ESD and lightning-induced surges on long cable runs in factory automation. IC Role / Device Role / Timing Role: Placed across differential pair (A/B) and ground to suppress common-mode and differential-mode transients simultaneously. Use Value: Symmetrical 53.3–58.9 V breakdown ensures balanced clamping on both lines, preserving signal integrity and avoiding receiver offset errors. |
| Telecom PoE+ Midspan Injector Output | Consumer Smart Meter Voltage Reference Rail |
Use Scenario: Guards 54 V PoE+ output stage against inductive switching noise and hot-swap transients during plug-in events. IC Role / Device Role / Timing Role: Fast-response TVS absorbs sub-microsecond surges before they propagate into Ethernet PHY or isolation transformers. Use Value: 77.4 V clamping stays well below 60 V absolute maximum of IEEE 802.3at-compliant PD controllers, ensuring robust interoperability. |
Use Scenario: Stabilizes 48 V auxiliary rail feeding precision ADC reference and real-time clock in AMI smart meters exposed to grid surges. IC Role / Device Role / Timing Role: Low-leakage (<1 µA) TVS prevents drift in high-impedance voltage dividers and bandgap references during standby. Use Value: Maintains <0.1% error contribution to 24-bit metrology ADCs even at elevated temperatures up to +85 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ48CA-M3/5B | Same electrical specs and SMB package; halogen-free, RoHS-compliant, but not AEC-Q101 qualified. | Suitable for commercial/industrial use only; excluded from automotive production programs requiring AEC certification. | Select when halogen-free compliance is mandatory and automotive qualification is unnecessary. |
| SMCJ48CAHE3_A/H | Higher 1500 W PPPM rating in larger SMC (DO-214AB) package; identical VWM/VC but 15.4 A IPPM. | Used where higher surge margin is needed (e.g., outdoor telecom cabinets); requires larger PCB area and different pad layout. | Choose when legacy designs require upgrade to higher energy handling without changing circuit topology. |
Compared with SMBJ48CAHE3_B/H, the M3 variant trades AEC-Q101 for halogen-free content, while the SMCJ48CAHE3_A/H delivers 2.5× surge capacity at the cost of footprint and thermal mass - making SMBJ48CAHE3_B/H optimal for space-constrained automotive and industrial modules needing certified reliability.
Availability
SMBJ48CAHE3_B/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial RS-485 networks, and telecom PoE+ systems requiring stable component supply with AEC-Q101 traceability and long-term lifecycle support.
Supply support for SMBJ48CAHE3_B/H 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 targets high-reliability transient suppression in automotive, industrial, and communications infrastructure - engineered for robustness under repetitive surge stress and extended temperature operation.
FAQ
What is the clamping voltage of SMBJ48CAHE3_B/H at its rated peak pulse current?
The SMBJ48CAHE3_B/H has a maximum clamping voltage (VC) of 77.4 V at 7.8 A peak pulse current (IPPM) with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is SMBJ48CAHE3_B/H suitable for automotive applications?
Yes, SMBJ48CAHE3_B/H is AEC-Q101 qualified and specifically intended for automotive use. Its construction includes glass-passivated junctions, MSL Level 1 handling, and operation up to +150 °C junction temperature - meeting requirements for engine bay, chassis, and body control module deployments where reliability under thermal cycling and vibration is essential.
How does the bidirectional configuration of SMBJ48CAHE3_B/H affect PCB layout?
The SMBJ48CAHE3_B/H has no polarity marking and functions identically in either orientation, simplifying PCB layout for differential or floating lines. Unlike unidirectional TVS diodes, it eliminates orientation checks during assembly and supports symmetric placement across AC-coupled paths - reducing design risk and enabling reuse across multiple signal types without redesign.
What is the standoff voltage (VWM) rating for SMBJ48CAHE3_B/H?
The standoff voltage (VWM) for SMBJ48CAHE3_B/H is 48 V - the maximum continuous reverse voltage the device can block without significant conduction. This rating ensures compatibility with 48 V nominal systems such as automotive 48 V mild-hybrid architectures, PoE+, and industrial control power rails while maintaining sub-1 µA leakage current.
Does SMBJ48CAHE3_B/H meet any industry surge immunity standards?
SMBJ48CAHE3_B/H supports compliance with IEC 61000-4-5 (surge immunity) and ISO 7637-2 (automotive transients) when applied with appropriate PCB layout - including minimum 0.2" × 0.2" copper pads per terminal. Its 600 W peak pulse power and 77.4 V clamping enable Level 3/4 surge testing pass margins in end-equipment validation.
SMBJ48CAHE3_B/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Bulk
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ48CAHE3_B/H FAQ
1.How can I place an order for SMBJ48CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ48CAHE3_B/H 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 SMBJ48CAHE3_B/H reliable?
The price and inventory of SMBJ48CAHE3_B/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ48CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ48CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ48CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ48CAHE3_B/H?
SMBJ48CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ48CAHE3_B/H 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 SMBJ48CAHE3_B/H?
For technical support, including SMBJ48CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ48CAHE3_B/H requirements.
6.How does Aetrix verify that SMBJ48CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ48CAHE3_B/H 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 SMBJ48CAHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ48CAHE3_B/H?
All SMBJ48CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ48CAHE3_B/H, 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 SMBJ48CAHE3_B/H part is unused and in its original packaging.
Return procedure for SMBJ48CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ48CAHE3_B/H Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
