My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ28AHE3_B/H
- Part No.:
- SMBJ28AHE3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ28AHE3_B/H.pdf
- Description:
- 600W,28V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,990
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ28AHE3_B/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR) at 1 mA, 45.4 V maximum clamping voltage (VC) at 13.2 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and automotive ECUs.
For engineers reviewing the SMBJ28AHE3_B/H datasheet, SMBJ28AHE3_B/H pinout, SMBJ28AHE3_B/H application, or SMBJ28AHE3_B/H equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (−55 to +150 °C), and compliance with UL 497B surge protector classification.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold, diverting surge energy away from protected circuitry. Its glass-passivated junction ensures stable leakage performance and fast response time (<1 ns), while the low incremental surge resistance enables effective suppression of high-current transients induced by inductive switching or ESD events.
The SMBJ28AHE3_B/H variant is AEC-Q101 qualified and RoHS-compliant, with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. It meets MSL level 1 (peak reflow 260 °C) and is rated for repetitive surge duty cycle ≤0.01 % under specified thermal conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected line. |
| VBR (min/max) | 31.1 V / 34.4 V at IT = 1 mA - Confirmed breakdown range ensuring predictable turn-on behavior across production lots. |
| VC @ IPPM | 45.4 V at 13.2 A - Clamped voltage during 600 W 10/1000 µs surge; determines maximum stress on downstream components. |
| PPPM | 600 W - Peak pulse power handling capability; validates robustness against lightning-induced surges and load dump events. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports protection of rectifier stages and DC bus inputs. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive and high-ambient industrial environments. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; informs PCB thermal layout requirements. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with cathode band marking. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), compliant with JEDEC DO-214AA outline.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return plane; carries full surge current during clamping. |
| Cathode | Protected line connection / Surge sink | Connected to line being protected (e.g., 24 V rail); reverse-biased during normal operation, avalanches during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring reliability under thermal cycling and vibration. |
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surge events up to 4 kV. |
| Glass passivated junction | Ensures stable reverse leakage (<1 µA at VWM) and long-term parameter stability across temperature and humidity stress. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without preconditioning; eliminates moisture-related popcorning risk. |
| UL 497B recognized (QVGQ2) | Meets Underwriters Laboratories requirements for telecom and industrial surge protection devices; simplifies system-level certification. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply rails in engine control modules from load dump transients (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between battery input and DC/DC converter input stage. Use Value: Limits transient voltage to ≤45.4 V, preventing damage to downstream regulators and microcontrollers rated for 36 V absolute maximum. |
Use Scenario: Shielding analog output lines of pressure sensors in factory automation systems from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance clamping diode connected between signal line and ground, with minimal impact on 10 kHz bandwidth. Use Value: Maintains signal integrity while suppressing ±8 kV contact ESD per IEC 61000-4-2 with sub-1 ns response and <1 µA leakage at 24 V. |
| Telecom DC Power Input Protection | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Safeguarding PoE-powered equipment front-end circuits from surges entering via 48 V DC input lines. IC Role / Device Role / Timing Role: Primary surge clamp on DC input before hot-swap controller and filtering stage. Use Value: Absorbs 600 W surges without degradation, enabling compliance with GR-1089-CORE telecom immunity requirements. |
Use Scenario: Suppressing inductive kickback from brushed DC motors in smart home appliances during commutation. IC Role / Device Role / Timing Role: Freewheeling TVS across motor terminals to clamp flyback voltage spikes exceeding 28 V. Use Value: Prevents MOSFET drain-source breakdown by limiting spike amplitude to 45.4 V, extending power stage lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28AHM3_B/H | Halogen-free, RoHS-compliant, AEC-Q101 qualified - identical electrical specs but different material composition. | No functional difference; selected where halogen-free compliance is mandated by OEM environmental policy. | Direct material substitution when halogen-free requirement applies; same footprint, thermal, and electrical behavior. |
| SMBJ28A-E3/52 | Commercial-grade (non-AEC-Q101), same SMB package and electrical ratings, RoHS-compliant, 7" tape/reel packaging. | Not qualified for automotive use; suitable for industrial and consumer applications with lower reliability requirements. | Cost-optimized alternative where AEC-Q101 qualification is unnecessary; requires no PCB change. |
Compared with SMBJ28AHE3_B/H, the HM3 variant offers identical performance with halogen-free construction, while the E3/52 version provides commercial-grade cost savings without AEC-Q101 validation - enabling tiered sourcing based on end-equipment qualification needs.
Availability
SMBJ28AHE3_B/H is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and consumer appliance motor drives requiring stable component supply with AEC-Q101 assurance and traceable sourcing.
Supply support for SMBJ28AHE3_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 is engineered for robust transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where failure due to voltage surges must be prevented without compromising signal integrity or thermal performance.
FAQ
What is the clamping voltage of SMBJ28AHE3_B/H at its rated peak pulse current?
The SMBJ28AHE3_B/H has a maximum clamping voltage (VC) of 45.4 V at its rated peak pulse current (IPPM) of 13.2 A, measured under the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring downstream components remain within their absolute maximum ratings. The SMBJ28AHE3_B/H maintains this clamping performance across its qualified temperature range and after repeated surge exposure.
Is SMBJ28AHE3_B/H suitable for automotive applications?
Yes, SMBJ28AHE3_B/H is AEC-Q101 qualified, making it suitable for automotive applications including engine control units, body control modules, and ADAS power supplies. Its qualification covers temperature cycling, mechanical shock, vibration, and high-temperature operating life testing. The SMBJ28AHE3_B/H also meets UL 497B for surge protector classification and is rated for operation from −55 °C to +150 °C - fulfilling under-hood thermal requirements. Always verify system-level compliance with ISO 7637-2 and ISO 16750-2.
What does the "HE3" suffix indicate in SMBJ28AHE3_B/H?
The "HE3" suffix in SMBJ28AHE3_B/H denotes a RoHS-compliant, AEC-Q101 qualified variant with standard matte tin plating. The "H" indicates 7-inch tape-and-reel packaging (750 units per reel), and "B/H" specifies the revision code and packaging format per Vishay's ordering nomenclature. This distinguishes it from commercial-grade variants (e.g., E3) and halogen-free qualified versions (HM3). The SMBJ28AHE3_B/H is intended for high-reliability automotive and industrial designs requiring both environmental compliance and stress qualification.
How does SMBJ28AHE3_B/H compare to bidirectional TVS diodes like SMBJ28CA?
The SMBJ28AHE3_B/H is unidirectional and intended for DC line protection where polarity is fixed (e.g., 24 V supply rails), offering lower leakage and higher surge current capability in the forward direction. In contrast, SMBJ28CA is bidirectional and suited for AC or floating signal lines (e.g., RS-485, CAN). The SMBJ28AHE3_B/H cannot replace SMBJ28CA in AC-coupled applications without circuit redesign, as it conducts in forward bias and lacks symmetrical clamping. Select SMBJ28AHE3_B/H only where unidirectional protection aligns with system architecture.
What PCB layout considerations apply to SMBJ28AHE3_B/H?
For optimal thermal and surge performance, SMBJ28AHE3_B/H should be mounted on minimum recommended pad layout: 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, with internal ground planes connected via multiple vias. Keep traces short and wide between the SMBJ28AHE3_B/H and protected node to minimize inductance. Avoid routing sensitive signals near the device, and ensure the cathode connects directly to the line being protected while the anode ties to a low-impedance ground plane - not a daisy-chained or narrow trace. Thermal relief patterns must be minimized to preserve RθJL = 20 °C/W.
SMBJ28AHE3_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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 13.2A
- 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)
SMBJ28AHE3_B/H FAQ
1.How can I place an order for SMBJ28AHE3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ28AHE3_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 SMBJ28AHE3_B/H reliable?
The price and inventory of SMBJ28AHE3_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 SMBJ28AHE3_B/H is usually 5 days.
3.What payment methods are accepted for SMBJ28AHE3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ28AHE3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ28AHE3_B/H?
SMBJ28AHE3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ28AHE3_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 SMBJ28AHE3_B/H?
For technical support, including SMBJ28AHE3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ28AHE3_B/H requirements.
6.How does Aetrix verify that SMBJ28AHE3_B/H is sourced from the original manufacturer or authorized distributors?
All SMBJ28AHE3_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 SMBJ28AHE3_B/H meets industry standards.
7.What is the process for return or replacement of SMBJ28AHE3_B/H?
All SMBJ28AHE3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ28AHE3_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 SMBJ28AHE3_B/H part is unused and in its original packaging.
Return procedure for SMBJ28AHE3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ28AHE3_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 …
