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Vishay General Semiconductor - Diodes Division SMBJ28AHE3_A/H
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- Part No.:
- SMBJ28AHE3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ28AHE3_A/H.pdf
- Description:
- TVS DIODE 28VWM 45.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,277
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Product details
Overview
SMBJ28AHE3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping fast-rising ESD and surge transients on power and signal lines. It features 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 motor drives.
For engineers reviewing the SMBJ28AHE3_A/H datasheet, SMBJ28AHE3_A/H pinout, SMBJ28AHE3_A/H application, or SMBJ28AHE3_A/H equivalent, this device is evaluated for robust overvoltage protection in 24 V DC power rails, automotive body electronics, and I/O line hardening where low clamping voltage, AEC-Q101 qualification, and MSL Level 1 reflow compatibility are required.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents <1.0 µA reverse leakage at 28 V, then rapidly avalanches when transient voltage exceeds its 31.1–34.4 V breakdown range. Its 45.4 V clamping voltage at 13.2 A ensures downstream components see limited overvoltage during 600 W surge events.
Thermally, it delivers 5.0 W steady-state power dissipation at 50 °C ambient, with junction-to-ambient thermal resistance of 100 °C/W and junction-to-lead of 20 °C/W. The device is AEC-Q101 qualified, RoHS-compliant, and rated for -55 °C to +150 °C operating junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin for 24 V nominal systems. |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - Confirmed breakdown range ensuring reliable triggering above system operating voltage with process tolerance. |
| VC @ IPPM | 45.4 V at 13.2 A - Clamping voltage during 600 W 10/1000 µs surge; determines maximum stress imposed on protected IC or MOSFET. |
| PPPM | 600 W - Peak pulse power handling capability per standard 10/1000 µs waveform; validates suitability for IEC 61000-4-5 Level 3/4 surges. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports protection against load dump or inductive kick events. |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or enclosed industrial enclosures. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint, compatible with automated placement and J-STD-020 MSL Level 1 reflow. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by band marking on one end. Terminals are solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to ground or low-impedance return plane; completes clamping path during transient events. |
| Cathode | Protected line connection | Connected to the line being protected (e.g., 24 V rail or sensor output); avalanche conduction occurs from cathode to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including body control modules and power distribution units requiring long-term reliability under thermal cycling and vibration. |
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity requirements up to 1 kV open-circuit / 500 A short-circuit test levels. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage overshoot during clamping, reducing stress on downstream 30 V-rated MOSFETs or 3.3 V/5 V interface ICs. |
| MSL Level 1 (260 °C peak) | Supports single-reflow assembly without moisture sensitivity concerns - eliminates bake-out requirement in high-volume SMT lines. |
| Glass passivated junction | Ensures stable VBR and low leakage over lifetime; critical for maintaining protection integrity in harsh industrial environments. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O lines against inductive switching spikes from 24 V solenoid coils and relay loads. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between 24 V supply rail and ground, triggered within <1 ns to clamp transients below 46 V. Use Value: Prevents latch-up or permanent damage to 30 V-rated logic-level MOSFETs and 5 V MCU GPIOs during repeated coil de-energization events. |
Use Scenario: Hardening LIN bus transceiver power pins and wake-up inputs against battery load dump and jump-start surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V/24 V supply input to BCM power management IC, clamping to 45.4 V during 10/1000 µs surges. Use Value: Maintains functional safety integrity per ISO 16750-2 by limiting voltage excursion to within 120 % of downstream regulator absolute maximum rating. |
| Industrial Sensor Signal Conditioning | Telecom Power Interface |
|
Use Scenario: Protecting analog front-end inputs of 4–20 mA current loop receivers from field wiring ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Low-leakage (<1 µA at 28 V) unidirectional TVS placed across input terminals, with minimal impact on precision current measurement. Use Value: Preserves 16-bit ADC accuracy while enabling EN 61000-4-2 ±8 kV contact discharge immunity without additional series impedance. |
Use Scenario: Input-stage surge suppression on 48 V DC telecom power feeds entering remote radio units or base station cabinets. IC Role / Device Role / Timing Role: Primary clamping device on DC input before bulk capacitor and DC/DC converter, absorbing 600 W surges without thermal runaway. Use Value: Eliminates need for secondary MOV-based protection stages, reducing BOM count and PCB area in space-constrained outdoor enclosures. |
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_A/H | Halogen-free variant with identical electrical specs, same AEC-Q101 qualification, and identical SMB package. | No functional difference; selected when halogen-free compliance is mandated by OEM environmental policy (e.g., IPC-1752). | Direct material substitution where RoHS + halogen-free requirements apply; no layout or validation changes needed. |
| SMBJ28A-E3/52 | Commercial-grade (non-AEC-Q101), same VWM/VC/PPPM, but rated only for -55 °C to +150 °C without automotive qualification testing. | Approved for industrial/commercial use only; not permitted in automotive production or safety-critical subsystems. | Select when cost sensitivity outweighs automotive qualification needs and full temperature range validation is performed internally. |
Compared with SMBJ28AHE3_A/H, the HM3 variant adds halogen-free compliance without performance trade-offs, while the E3/52 version removes AEC-Q101 validation - making the HE3 the sole choice for automotive Tier 1 production where both qualification and RoHS are mandatory.
Availability
SMBJ28AHE3_A/H is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power interface designs requiring stable component supply, AEC-Q101 traceability, and MSL Level 1 reflow compatibility.
Supply support for SMBJ28AHE3_A/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 performance.
The SMBJ series is engineered for high-energy transient suppression in automotive, industrial, and telecom infrastructure - delivering consistent clamping behavior, low leakage, and validated qualification for mission-critical power and signal line protection.
FAQ
What is the maximum clamping voltage of SMBJ28AHE3_A/H at its rated peak pulse current?
The SMBJ28AHE3_A/H has a maximum clamping voltage (VC) of 45.4 V at its specified peak pulse current (IPPM) of 13.2 A, measured using the standardized 10/1000 µs double-exponential surge waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ28AHE3_A/H maintains this clamping performance while supporting 600 W surge power dissipation.
Is SMBJ28AHE3_A/H qualified for automotive applications?
Yes, SMBJ28AHE3_A/H is explicitly AEC-Q101 qualified, as confirmed in Vishay's ordering information and thermal characteristics notes. This qualification covers stress tests including high-temperature operating life, temperature cycling, and unbiased highly accelerated stress testing - validating its use in automotive body electronics, power distribution units, and other non-safety-critical vehicle subsystems. The "HE3" suffix denotes RoHS-compliant and AEC-Q101 qualified construction.
What is the standoff voltage rating of SMBJ28AHE3_A/H, and how does it relate to 24 V systems?
The SMBJ28AHE3_A/H has a reverse stand-off voltage (VWM) of 28 V, providing a 4 V margin above nominal 24 V DC systems to accommodate ripple, tolerance, and transient headroom without leakage or conduction. This ensures stable operation during normal conditions while allowing immediate avalanche response when voltage exceeds 31.1 V (minimum VBR). The SMBJ28AHE3_A/H is therefore optimized for primary overvoltage protection in 24 V industrial and automotive power rails.
Does SMBJ28AHE3_A/H meet moisture sensitivity level (MSL) requirements for lead-free reflow?
Yes, SMBJ28AHE3_A/H meets J-STD-020 MSL Level 1 with a maximum peak reflow temperature of 260 °C, meaning it can be processed in standard lead-free reflow ovens without preconditioning or baking. This eliminates moisture-related popcorning risk and simplifies high-volume SMT manufacturing - a key advantage over higher-MSL alternatives that require strict floor-life controls. The SMBJ28AHE3_A/H achieves this via robust molding compound and terminal plating per JESD 22-B102.
How does the glass passivated junction benefit long-term reliability of SMBJ28AHE3_A/H?
The glass passivated chip junction in SMBJ28AHE3_A/H prevents surface contamination and oxidation at the PN junction, stabilizing breakdown voltage (VBR) and minimizing reverse leakage drift over time and temperature. This directly enhances long-term protection integrity in harsh environments such as under-hood automotive locations or factory-floor industrial controllers. Unlike epoxy-passivated alternatives, the SMBJ28AHE3_A/H maintains <1.0 µA leakage at 28 V across its full -55 °C to +150 °C operating range.
SMBJ28AHE3_A/H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.5V
- Current - Peak Pulse (10/1000µs):
- 13.2A
- 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 (SMBJ)
SMBJ28AHE3_A/H FAQ
1.How can I place an order for SMBJ28AHE3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ28AHE3_A/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_A/H reliable?
The price and inventory of SMBJ28AHE3_A/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_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ28AHE3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ28AHE3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ28AHE3_A/H?
SMBJ28AHE3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ28AHE3_A/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_A/H?
For technical support, including SMBJ28AHE3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ28AHE3_A/H requirements.
6.How does Aetrix verify that SMBJ28AHE3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ28AHE3_A/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_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ28AHE3_A/H?
All SMBJ28AHE3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ28AHE3_A/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_A/H part is unused and in its original packaging.
Return procedure for SMBJ28AHE3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ28AHE3_A/H Tags
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