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Vishay General Semiconductor - Diodes Division SMBJ45CAHE3_B/H
- Part No.:
- SMBJ45CAHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ45CAHE3_B/H.pdf
- Description:
- 600W,45V 5%,BIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:5,913
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Product details
Overview
SMBJ45CAHE3_B/H from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. It features 45 V standoff voltage (VWM), 50.0–55.3 V breakdown voltage (VBR) at 1 mA, 72.7 V maximum clamping voltage (VC) at 8.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed on signal lines and power rails in industrial sensor interfaces.
For engineers reviewing the SMBJ45CAHE3_B/H datasheet, SMBJ45CAHE3_B/H pinout, SMBJ45CAHE3_B/H application, or SMBJ45CAHE3_B/H equivalent, this device serves as a high-reliability, AEC-Q101-qualified transient suppressor for automotive-grade and industrial-grade circuits requiring stable clamping performance under repetitive surge events and low leakage (<1.0 µA at VWM).
Technical Context
This bidirectional TVS operates symmetrically in both polarities, delivering identical electrical characteristics across reverse and forward directions. Its glass-passivated junction ensures stable breakdown behavior, low incremental surge resistance, and fast response time (<1 ns), enabling effective suppression of ESD, lightning-induced transients, and inductive switching spikes.
The device is rated for 150 °C maximum junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Its thermal resistance (RθJA) is 100 °C/W, and it supports 100 A non-repetitive forward surge current (IFSM) for unidirectional variants - though SMBJ45CAHE3_B/H is bidirectional and thus excludes IFSM specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 45 V - Maximum continuous reverse operating voltage before clamping begins; defines safe working range for protected circuitry. |
| VBR (min/max) | 50.0 V / 55.3 V at IT = 1 mA - Confirmed breakdown threshold range ensuring reliable turn-on during transients. |
| VC @ IPPM | 72.7 V at 8.3 A - Clamped voltage during 10/1000 µs surge; limits stress on downstream ICs and MOSFETs. |
| PPPM | 600 W - Peak pulse power handling capability; sustains short-duration energy surges without failure. |
| ID @ VWM | <1.0 µA - Ultra-low reverse leakage ensures minimal standby power loss and signal integrity in high-impedance nodes. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 0.220" x 0.155" footprint; compatible with automated pick-and-place. |
| AEC-Q101 | Qualified - Validated for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminals enable mounting without orientation constraints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | Either terminal accepts positive or negative transient voltage; no cathode band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power | Handles high-energy transients (e.g., ISO 7637-2 Pulse 1/2a/5a) without degradation in automotive and industrial environments. |
| 72.7 V clamping at 8.3 A | Provides predictable voltage limiting to protect 48 V system components such as CAN transceivers and microcontrollers. |
| AEC-Q101 qualification | Validated for automotive use including temperature cycling, humidity bias, and mechanical shock per industry reliability standards. |
| MSL Level 1, 260 °C peak reflow | Enables standard lead-free SMT assembly without moisture sensitivity concerns or pre-bake requirements. |
| UL 94 V-0 molding compound | Ensures flame-retardant PCB-level safety compliance in enclosed industrial enclosures and automotive modules. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting analog sensor outputs (e.g., pressure, temperature) in engine bay modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across differential signal pair or supply rail to shunt transient energy before reaching ADC front-end. Use Value: Maintains signal fidelity by limiting excursion to ≤72.7 V while drawing <1.0 µA leakage at 45 V nominal rail. |
Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers subjected to field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff protector mounted at connector entry point to absorb 1 kV/500 A surge per IEC 61000-4-5. Use Value: Enables uninterrupted operation by clamping within nanoseconds and surviving ≥1000 surges at rated PPPM. |
| Telecom Power Rail Protection | Consumer Appliance Motor Control |
|
Use Scenario: Securing 48 V PoE-powered Ethernet switch ports against lightning-induced common-mode transients on data lines. IC Role / Device Role / Timing Role: Paired bidirectional TVS on each twisted pair to equalize clamping and prevent differential mode damage. Use Value: Matches telecom surge immunity requirements (GR-1089-CORE) with symmetric VBR tolerance (±5.3 V) and low capacitance. |
Use Scenario: Shielding MCU GPIOs and gate drivers in washing machine motor inverters from back-EMF spikes during brushless motor commutation. IC Role / Device Role / Timing Role: Localized TVS adjacent to MOSFET source/drain pins to suppress <100 ns ringing and reduce EMI coupling. Use Value: Prevents false triggering and latch-up in 3.3 V logic by limiting coupled transients to <72.7 V with sub-ns response. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ45CA-E3/52 | Same electrical specs and SMB package; RoHS-compliant commercial grade without AEC-Q101 qualification. | Lacks automotive reliability validation; suitable for consumer/industrial designs not requiring automotive qualification. | Select when cost sensitivity outweighs need for AEC-Q101 traceability and extended temperature life testing. |
| SMCJ45CAHE3_A/H | Higher 1500 W PPPM, same VWM/VC; larger SMC (DO-214AB) package with 0.280" x 0.240" footprint. | Supports higher surge duty cycles and longer pulse durations; requires PCB layout change due to larger pad area. | Choose when system-level surge testing exceeds 600 W requirements or when thermal dissipation demands lower RθJA. |
Compared with SMBJ45CAHE3_B/H, SMBJ45CA-E3/52 offers identical protection performance without automotive qualification, while SMCJ45CAHE3_A/H delivers 2.5× higher surge capacity in a physically larger package - enabling design flexibility between footprint-constrained AEC-Q101 compliance and higher-power industrial robustness.
Availability
SMBJ45CAHE3_B/H is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom power systems, and consumer appliance motor controls requiring stable component supply with full AEC-Q101 traceability and long-term lifecycle support.
Supply support for SMBJ45CAHE3_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, TVS devices, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBJ series was engineered for high-volume surface-mount transient suppression in automotive, industrial, and communications infrastructure - balancing compact size, repeatable clamping, and qualification-grade consistency.
FAQ
What is the clamping voltage of SMBJ45CAHE3_B/H at its rated peak pulse current?
The SMBJ45CAHE3_B/H has a maximum clamping voltage (VC) of 72.7 V at 8.3 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for protected ICs and MOSFETs in real-world surge events. The SMBJ45CAHE3_B/H maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBJ45CAHE3_B/H suitable for automotive applications?
Yes, SMBJ45CAHE3_B/H is AEC-Q101 qualified and explicitly designated for automotive use with suffix "HE3" indicating RoHS-compliant and AEC-Q101-qualified construction. It undergoes rigorous stress testing including temperature cycling, humidity bias, and mechanical shock - making it appropriate for engine control units, body control modules, and ADAS sensor interfaces where reliability under harsh conditions is mandatory. The SMBJ45CAHE3_B/H meets all applicable automotive qualification requirements per the Vishay documentation.
How does the bidirectional configuration of SMBJ45CAHE3_B/H affect its circuit implementation?
The bidirectional configuration of SMBJ45CAHE3_B/H means it provides symmetrical clamping in both polarities - eliminating the need for polarity-aware placement or external series diodes. This simplifies layout on AC-coupled lines, differential buses (e.g., RS-485, CAN), or ungrounded power rails. Unlike unidirectional variants, SMBJ45CAHE3_B/H has no cathode marking and functions identically regardless of voltage polarity, reducing assembly errors and enabling universal placement in dual-rail or floating systems.
What is the maximum reverse leakage current for SMBJ45CAHE3_B/H at its standoff voltage?
The SMBJ45CAHE3_B/H exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 45 V standoff voltage (VWM) and 25 °C ambient temperature. This ultra-low leakage preserves signal integrity in high-impedance sensor paths and minimizes standby power loss in battery-operated systems. Leakage remains below 5.0 µA up to +125 °C, ensuring stable performance across industrial operating ranges. The SMBJ45CAHE3_B/H achieves this via glass-passivated junction technology and tight process control.
Does SMBJ45CAHE3_B/H require special PCB layout considerations compared to other SMB-packaged TVS diodes?
No special layout is required beyond the standard SMB (DO-214AA) footprint: 0.220" × 0.155" pad dimensions with 0.086" center-to-center terminal spacing. However, optimal surge performance demands minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal to meet the 600 W rating per Vishay's test condition. Thermal relief and short, low-inductance traces to ground/power planes are recommended. The SMBJ45CAHE3_B/H shares identical mechanical dimensions and soldering profile with all SMBJ-series devices, enabling drop-in compatibility in existing layouts.
SMBJ45CAHE3_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):
- 45V
- Voltage - Breakdown (Min):
- 50V
- Voltage - Clamping (Max) @ Ipp:
- 72.7V
- Current - Peak Pulse (10/1000µs):
- 8.3A
- 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)
SMBJ45CAHE3_B/H FAQ
1.How can I place an order for SMBJ45CAHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ45CAHE3_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 SMBJ45CAHE3_B/H reliable?
The price and inventory of SMBJ45CAHE3_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 SMBJ45CAHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ45CAHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ45CAHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ45CAHE3_B/H?
SMBJ45CAHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ45CAHE3_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 SMBJ45CAHE3_B/H?
For technical support, including SMBJ45CAHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ45CAHE3_B/H requirements.
6.How does Aetrix verify that SMBJ45CAHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ45CAHE3_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 SMBJ45CAHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ45CAHE3_B/H?
All SMBJ45CAHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ45CAHE3_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 SMBJ45CAHE3_B/H part is unused and in its original packaging.
Return procedure for SMBJ45CAHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ45CAHE3_B/H Tags
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