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Vishay General Semiconductor - Diodes Division SMBJ28AHE3/5B
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- Part No.:
- SMBJ28AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ28AHE3/5B.pdf
- Description:
- TVS DIODE 28VWM 45.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,354
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Product details
Overview
SMBJ28AHE3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection of DC power rails and signal lines. It features a 28 V standoff voltage (VWM), 31.1–34.4 V breakdown range at 1 mA, 45.4 V maximum clamping voltage at 13.2 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform-used to safeguard MOSFETs, ICs, and sensor interfaces in industrial motor drives.
For engineers reviewing the SMBJ28AHE3/5B datasheet, SMBJ28AHE3/5B pinout, SMBJ28AHE3/5B application, or SMBJ28AHE3/5B equivalent, key selection criteria include clamping performance under 13.2 A surge, unidirectional polarity with cathode band marking, AEC-Q101 qualification status, and compatibility with automated SMT placement on SMB (DO-214AA) footprint.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VBR, it avalanches into low-impedance conduction to divert transient energy away from downstream circuitry. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
Designed for single-polarity DC systems, SMBJ28AHE3/5B exhibits 1.0 µA max reverse leakage at 28 V, 0.098 %/°C temperature coefficient of VBR, and thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads-enabling predictable derating above 25 °C ambient per Figure 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR @ IT = 1 mA | 31.1–34.4 V - Verified breakdown threshold ensuring reliable turn-on during transients without premature conduction. |
| VC @ IPPM = 13.2 A | 45.4 V - Clamped voltage seen by protected circuit during full 600 W surge; determines maximum stress on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 surge immunity. |
| IFSM | 100 A - Non-repetitive forward surge rating (8.3 ms half-sine); enables protection against inductive switch-off spikes. |
| TJ max | +150 °C - Maximum junction temperature; allows operation in high-temperature industrial enclosures without derating. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 0.220" length and matte tin-plated leads compliant with J-STD-002. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with UL 94 V-0 flammability rating; cathode indicated by a band on the body; terminals are matte tin-plated for solderability per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or low-impedance return plane; completes shunt path during avalanche conduction. |
| Cathode | Protected line connection | Connected to the line being protected (e.g., 24 V supply rail); polarity-sensitive-band denotes cathode end. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity up to 4 kV (line-to-earth) in industrial control systems. |
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing-suitable for under-hood ECUs. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (<1 ns response), critical for protecting sensitive gate drivers. |
| MSL Level 1 (260 °C peak reflow) | Supports lead-free reflow assembly without preconditioning; eliminates moisture-related popcorning risk. |
| Glass passivated junction | Ensures stable VBR over lifetime and improved resistance to humidity-induced parameter drift. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 24 V DC bus against inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp transients below MOSFET drain-source breakdown. Use Value: Limits clamped voltage to 45.4 V, preventing damage to 60 V-rated power FETs and maintaining system uptime in factory automation. |
Use Scenario: Guarding LIN bus transceiver inputs against load dump and jump-start surges in vehicle door modules. IC Role / Device Role / Timing Role: Standoff-rated TVS on LIN signal line (VWM = 28 V) to absorb 100 V/50 ms pulses without false triggering. Use Value: Maintains signal integrity during ISO 7637-2 Pulse 5a events while drawing only 1.0 µA leakage at nominal 12 V battery voltage. |
| Telecom Power Supplies | Industrial Sensor Interfaces |
|
Use Scenario: Input-stage protection for 48 V telecom rectifiers exposed to lightning-induced surges on outdoor feeder lines. IC Role / Device Role / Timing Role: Primary clamping device upstream of DC-DC converters; coordinated with MOVs for multi-stage protection. Use Value: Delivers 600 W pulse handling with <1 ns response, reducing let-through energy to downstream regulators by >85 % vs. Zener-only solutions. |
Use Scenario: Shielding 4–20 mA current loop transmitters from ESD and cable discharge events in process instrumentation. IC Role / Device Role / Timing Role: Low-leakage (1.0 µA) unidirectional TVS across loop terminals to prevent latch-up of precision op-amps. Use Value: Preserves measurement accuracy (no added offset) while surviving ±15 kV contact ESD per IEC 61000-4-2 without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28AHM3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU public infrastructure projects). | Choose SMBJ28AHM3/5B when halogen-free construction is required without compromising surge performance or qualification status. |
| SMCJ28AHE3/5B | Same VWM/VC but higher 1500 W PPPM; larger SMC (DO-214AB) package (0.285" x 0.235"). | Used where higher surge margin is needed (e.g., outdoor AC/DC front-ends), but requires PCB layout change. | Choose SMCJ28AHE3/5B only if 1500 W capability is essential and board space permits larger footprint. |
Compared with SMBJ28AHE3/5B, SMBJ28AHM3/5B offers identical protection performance with halogen-free materials, while SMCJ28AHE3/5B trades compact SMB size for 2.5× higher surge capacity-requiring layout revision but enabling harsher environment deployment.
Availability
SMBJ28AHE3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body electronics, telecom power supplies, and sensor interface circuits requiring stable component supply with AEC-Q101 assurance and RoHS compliance.
Supply support for SMBJ28AHE3/5B 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, and protection devices with emphasis on reliability, efficiency, and application-specific validation.
The SMBJ series targets high-reliability transient suppression in automotive, industrial, and telecom systems-designed to meet stringent surge immunity standards while supporting automated SMT manufacturing.
FAQ
What is the clamping voltage of SMBJ28AHE3/5B at its rated peak pulse current?
The SMBJ28AHE3/5B has a maximum clamping voltage (VC) of 45.4 V at its rated peak pulse current (IPPM) of 13.2 A using the 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during a full-power transient event. The SMBJ28AHE3/5B maintains this clamping performance consistently due to its glass-passivated junction and low dynamic impedance.
Is SMBJ28AHE3/5B qualified for automotive applications?
Yes, SMBJ28AHE3/5B is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HE3" and documentation in the SMBJ5.0A–SMBJ188A datasheet (Document Number 88392, Revision 09-Jan-2024). This qualification covers stress tests including HTGB, H3TRB, and temperature cycling-validating its suitability for under-hood and chassis-mounted automotive electronics where reliability under thermal and mechanical stress is critical. The SMBJ28AHE3/5B meets these requirements without derating.
What does the "5B" in SMBJ28AHE3/5B indicate?
The "5B" in SMBJ28AHE3/5B specifies the packaging configuration: 13-inch diameter plastic tape and reel, with a base quantity of 3200 units per reel. This format is optimized for high-volume automated SMT placement and aligns with industry-standard EIA-481-D carrier tape specifications. The "HE3" portion confirms RoHS compliance and AEC-Q101 qualification, while "5B" ensures compatibility with pick-and-place equipment feeders calibrated for 13″ reels. SMBJ28AHE3/5B is not compatible with 7″ reel handlers without adapter kits.
How does SMBJ28AHE3/5B differ from bidirectional variants like SMBJ28CA?
SMBJ28AHE3/5B is unidirectional, with polarity marked by a cathode band and intended for DC line protection where reverse conduction must be blocked. In contrast, SMBJ28CA is bidirectional-symmetrical in both directions, no polarity marking, and used in AC-coupled or floating signal lines. Their VBR and VC values differ: SMBJ28AHE3/5B has VBR = 31.1–34.4 V (reverse only), while SMBJ28CA has matched breakdown in both directions. Using SMBJ28AHE3/5B in an AC application would result in forward conduction and failure.
What is the maximum reverse leakage current for SMBJ28AHE3/5B at its standoff voltage?
The SMBJ28AHE3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA at its rated standoff voltage (VWM) of 28 V and TA = 25 °C. This ultra-low leakage preserves power efficiency in always-on systems such as battery-backed sensors or LIN bus nodes. Leakage remains below 5 µA up to 80 % of VWM, ensuring minimal impact on high-impedance monitoring circuits. The SMBJ28AHE3/5B achieves this via tightly controlled junction doping and glass passivation.
SMBJ28AHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
SMBJ28AHE3/5B FAQ
1.How can I place an order for SMBJ28AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ28AHE3/5B 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 SMBJ28AHE3/5B reliable?
The price and inventory of SMBJ28AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ28AHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ28AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ28AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ28AHE3/5B?
SMBJ28AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ28AHE3/5B 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 SMBJ28AHE3/5B?
For technical support, including SMBJ28AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ28AHE3/5B requirements.
6.How does Aetrix verify that SMBJ28AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ28AHE3/5B 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 SMBJ28AHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ28AHE3/5B?
All SMBJ28AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ28AHE3/5B, 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 SMBJ28AHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ28AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ28AHE3/5B Tags
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