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Vishay General Semiconductor - Diodes Division SMBJ5.0AHM3_B/H
- Part No.:
- SMBJ5.0AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ5.0AHM3_B/H.pdf
- Description:
- 600W,5.0V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:7,049
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Product details
Overview
SMBJ5.0AHM3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for primary overvoltage protection of 5.0 V DC power rails and signal lines. It delivers 600 W peak pulse power (10/1000 µs), clamps transients to ≤9.2 V at 65.2 A, and features 6.4–7.07 V breakdown voltage at 10 mA test current. Used in automotive ECUs, industrial sensor interfaces, and USB power input stages.
For engineers reviewing the SMBJ5.0AHM3_B/H datasheet, SMBJ5.0AHM3_B/H pinout, SMBJ5.0AHM3_B/H application, or SMBJ5.0AHM3_B/H equivalent, key selection criteria include its 5.0 V stand-off voltage, unidirectional polarity with cathode band marking, AEC-Q101 qualification status, halogen-free RoHS compliance, and 100 A IFSM surge rating - all critical for automotive-grade board-level ESD and load-dump protection.
Technical Context
This TVS operates as a clamping device that remains high-impedance below 5.0 V (VWM), then rapidly transitions to low-impedance conduction above its 6.4–7.07 V breakdown range (VBR). Its glass-passivated junction ensures stable leakage (<800 µA at VWM) and repeatable clamping performance under repetitive transients.
The SMBJ5.0AHM3_B/H uses a single PN junction structure optimized for fast response (<1 ns), low dynamic impedance, and minimal capacitance (typ. 1000 pF at 0 V), making it suitable for protecting low-speed analog and digital I/O without signal distortion. Thermal resistance is 100 °C/W (junction-to-ambient) on standard 5.0 mm × 5.0 mm copper pads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 5.0 V - Maximum continuous reverse voltage before significant leakage; defines maximum operating rail voltage it can protect. |
| VBR (Breakdown Voltage) | 6.4–7.07 V at 10 mA - Confirmed voltage range where device enters avalanche conduction; ensures reliable triggering above system nominal voltage. |
| VC (Clamping Voltage) | 9.2 V at IPPM = 65.2 A - Peak voltage seen by protected circuit during 600 W transient; determines downstream component voltage stress. |
| PPPM (Peak Pulse Power) | 600 W (10/1000 µs waveform) - Energy-handling capability for standardized lightning/surge events per IEC 61000-4-5. |
| IFSM (Surge Current) | 100 A (8.3 ms half-sine) - Unidirectional surge withstand for automotive load-dump events per ISO 7637-2. |
| TJ max. | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.59 mm max length; compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, MSL Level 1 (260 °C peak reflow), UL 94 V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes conduction loop during transient clamp event. |
| Cathode | High-side connection point | Marked with band; connects to protected line (e.g., 5 V rail); conducts when voltage exceeds VBR relative to anode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensors per stress test requirements. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC J-STD-201 Class 2 whisker resistance; supports green manufacturing. |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-earth) on 5 V systems without degradation. |
| Fast response time | <1 ns turn-on enables protection of high-speed logic and microcontroller I/O against ESD (IEC 61000-4-2 ±8 kV contact). |
| Low clamping ratio | VC/VBR ≈ 1.34 - Minimizes overvoltage overshoot during clamping, reducing risk to downstream 5 V tolerant ICs. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Guarding |
|---|---|
Use Scenario: Protecting 5 V supply inputs of engine control units (ECUs) and infotainment modules against ISO 7637-2 load dump and jump-start transients. IC Role / Device Role / Timing Role: Primary clamping TVS placed directly at connector entry point, shunting surge energy to chassis ground before reaching LDOs or PMICs. Use Value: Limits voltage to ≤9.2 V during 65.2 A transients, preventing latch-up or permanent damage to 5 V-rated power management ICs. |
Use Scenario: Shielding analog output lines (e.g., 4–20 mA transmitter outputs) in factory automation sensors from induced switching noise and ESD. IC Role / Device Role / Timing Role: Bidirectional-capable variant not used; this unidirectional part protects grounded-signal paths where polarity is fixed and ground-referenced. Use Value: Maintains signal integrity with <800 µA leakage at 5 V, while clamping fast transients before they corrupt ADC reference or op-amp inputs. |
| USB Type-A Port VBUS Protection | DC-DC Converter Feedback Node Clamp |
Use Scenario: Safeguarding 5 V VBUS lines in automotive USB chargers and docking stations against hot-plug spikes and cable discharge events. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between VBUS and GND, acting as last-line defense after upstream fuses and common-mode chokes. Use Value: Clamps hot-plug overshoot to 9.2 V within nanoseconds, meeting USB 2.0 electrical specification limits for connected host controllers. |
Use Scenario: Preventing feedback node corruption in buck converters supplying 5 V to microcontrollers during input rail transients. IC Role / Device Role / Timing Role: Low-capacitance TVS across FB resistor divider to suppress voltage spikes that would cause erroneous regulation or oscillation. Use Value: 1000 pF typical junction capacitance avoids destabilizing compensation networks while providing sub-10 V clamping at feedback pin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0AHE3_B/H | Same electrical specs and SMB package; RoHS-compliant but not halogen-free; lacks HM3 suffix designation. | Approved for commercial-grade automotive use but not certified to halogen-free material requirements. | Select when halogen-free content is not mandated by OEM spec or regional environmental regulations. |
| SMAJ5.0A-M3 | Lower 400 W PPPM rating; SMA (DO-214AC) package with smaller footprint (4.5 × 2.7 mm vs. 5.6 × 3.9 mm); same VWM/VBR/VC. | Suitable for space-constrained consumer PCBs but derates faster under thermal stress due to higher RθJA. | Choose only if board area is critical and peak surge energy remains ≤400 W; verify thermal margin with layout. |
Compared with SMBJ5.0AHM3_B/H, the HE3 variant trades halogen-free compliance for cost-sensitive commercial designs, while the SMAJ5.0A-M3 reduces footprint at the expense of 33 % lower surge power handling and reduced thermal robustness - requiring careful layout validation for automotive or industrial use.
Availability
SMBJ5.0AHM3_B/H is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and USB power delivery systems requiring stable component supply across extended production lifecycles.
Supply support for SMBJ5.0AHM3_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, automotive qualification, and high-volume manufacturability.
The SMBJ series is engineered specifically for board-level transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where AEC-Q101 compliance, high surge robustness, and long-term stability are mandatory.
FAQ
What is the polarity configuration of SMBJ5.0AHM3_B/H?
SMBJ5.0AHM3_B/H is a unidirectional TVS diode. Its cathode is marked with a band on the SMB package body and must be connected to the line being protected (e.g., 5 V rail), while the anode connects to ground. This configuration allows conduction only during positive transients relative to ground, matching standard DC power rail protection topology.
Does SMBJ5.0AHM3_B/H meet automotive qualification standards?
Yes, SMBJ5.0AHM3_B/H carries the HM3 suffix, indicating it is halogen-free, RoHS-compliant, and AEC-Q101 qualified. It has passed stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its suitability for under-hood and chassis-mounted automotive electronics.
What is the maximum clamping voltage of SMBJ5.0AHM3_B/H under surge conditions?
The SMBJ5.0AHM3_B/H clamps to a maximum of 9.2 V when subjected to its rated peak pulse current of 65.2 A (10/1000 µs waveform). This value is measured per standard test conditions and guarantees that protected circuits see no more than 9.2 V during worst-case transient events, preserving 5 V logic and analog components.
Can SMBJ5.0AHM3_B/H replace bidirectional TVS diodes in circuit designs?
No - SMBJ5.0AHM3_B/H is unidirectional and cannot substitute for bidirectional devices like SMBJ5.0CA without redesign. Bidirectional types conduct during both polarities of transients and lack polarity marking; using SMBJ5.0AHM3_B/H in their place leaves negative-going transients unprotected and risks reverse breakdown failure.
What is the thermal resistance and recommended pad layout for SMBJ5.0AHM3_B/H?
SMBJ5.0AHM3_B/H 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. To maintain reliability under repeated surges, use minimum recommended pad dimensions from Vishay's DO-214AA outline drawing and avoid excessive trace narrowing near the device terminals.
SMBJ5.0AHM3_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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.4V
- Voltage - Clamping (Max) @ Ipp:
- 9.2V
- Current - Peak Pulse (10/1000µs):
- 65.2A
- 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)
SMBJ5.0AHM3_B/H FAQ
1.How can I place an order for SMBJ5.0AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ5.0AHM3_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 SMBJ5.0AHM3_B/H reliable?
The price and inventory of SMBJ5.0AHM3_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 SMBJ5.0AHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ5.0AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ5.0AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ5.0AHM3_B/H?
SMBJ5.0AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ5.0AHM3_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 SMBJ5.0AHM3_B/H?
For technical support, including SMBJ5.0AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ5.0AHM3_B/H requirements.
6.How does Aetrix verify that SMBJ5.0AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ5.0AHM3_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 SMBJ5.0AHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ5.0AHM3_B/H?
All SMBJ5.0AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ5.0AHM3_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 SMBJ5.0AHM3_B/H part is unused and in its original packaging.
Return procedure for SMBJ5.0AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ5.0AHM3_B/H Tags
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