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Vishay General Semiconductor - Diodes Division SMB10J28AHM3/H
- Part No.:
- SMB10J28AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J28AHM3/H.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,664
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Product details
Overview
SMB10J28AHM3/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection 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, 1000 W peak pulse power (10/1000 µs), 22.0 A peak pulse current (IPPM), and clamps to ≤45.4 V under surge. It is AEC-Q101 qualified and used in automotive power rail protection.
For engineers reviewing the SMB10J28AHM3/H datasheet, SMB10J28AHM3/H pinout, SMB10J28AHM3/H application, or SMB10J28AHM3/H equivalent, this page delivers verified electrical specs, automotive-grade qualification status, clamping performance under standardized surge waveforms, and real-world use context for ESD/surge hardening of 12 V/24 V systems.
Technical Context
This TVS diode operates as a unidirectional clamping device with avalanche breakdown behavior, optimized for fast response (<1 ns) to transients induced by load dump, inductive switching, or ISO 7637-2 pulses. Its glass-passivated junction ensures stable VBR tolerance and low leakage (≤1.0 µA at 28 V).
The SMB10J28AHM3/H is rated for 150 °C maximum junction temperature and exhibits 72 °C/W junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads. Its halogen-free, RoHS-compliant construction (HM3 suffix) meets automotive reliability requirements per AEC-Q101 stress tests.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28 V - Maximum continuous reverse operating voltage before significant leakage; sets threshold for 12 V/24 V system rail protection. |
| VBR (Breakdown Voltage) | 31.1–34.4 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering above normal operating voltage. |
| VC (Clamping Voltage) | ≤45.4 V at 22.0 A (10/1000 µs) - Maximum voltage seen by protected circuit during worst-case surge; critical for downstream IC survival. |
| PPPM (Peak Pulse Power) | 1000 W (10/1000 µs) - Sustains high-energy transients typical of automotive load dump and ISO 7637-2 Test Pulses 1/2a/5a. |
| IFSM (Surge Current) | 100 A (8.3 ms half-sine) - Withstands repetitive or single-event overcurrent events without bond wire failure. |
| TJ max | 150 °C - Enables operation in under-hood automotive environments with minimal derating. |
| Package | SMB (DO-214AA) - Surface-mount, low-profile package compatible with automated placement and reflow soldering (MSL Level 1, 260 °C peak). |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads; cathode indicated by color band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path); conducts during forward surge or bias conditions. |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 24 V rail); initiates clamping when reverse voltage exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including temperature cycling, humidity bias, and mechanical shock per JESD22 standards. |
| Halogen-free & RoHS-compliant (HM3) | Meets automotive environmental compliance requirements and supports lead-free reflow assembly without compromising reliability. |
| Glass-passivated junction | Ensures tight VBR tolerance, low leakage (<1 µA), and long-term stability under thermal and electrical stress. |
| Low incremental surge resistance | Enables tighter VC–VBR margin (ΔV = 14.3 V), improving protection headroom for sensitive 3.3 V/5 V interface ICs downstream. |
| MSL Level 1 rating | Allows unlimited floor life and standard reflow profile compatibility (peak 260 °C), reducing manufacturing risk. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Card |
|---|---|
|
Use Scenario: Protects microcontroller I/O and CAN transceiver power rails from load-dump-induced surges during battery disconnect/reconnect events. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between 24 V supply and ground, shunting energy before it reaches LDOs or level shifters. Use Value: Limits transient voltage to ≤45.4 V, preventing latch-up or gate oxide damage in 3.3 V logic interfaces powered from local 5 V/3.3 V regulators. |
Use Scenario: Shields 24 V digital input optocoupler front-end from field-wiring induced surges (e.g., relay coil kickback, lightning coupling). IC Role / Device Role / Timing Role: Primary surge suppression element on the 24 V input line upstream of series current-limiting resistor and opto-LED. Use Value: Absorbs 1000 W pulses without degradation, maintaining <1 µA leakage at 28 V to avoid false triggering in high-impedance sensing circuits. |
| Automotive Infotainment Power Supply | Telecom Remote Radio Unit (RRU) DC Feed |
|
Use Scenario: Guards buck converter input stage against ISO 7637-2 Pulse 5a (load dump up to 60 V, 400 ms) in head-unit power distribution. IC Role / Device Role / Timing Role: First-line transient suppressor on main 12 V/24 V input, placed before EMI filter and primary FET switch. Use Value: Clamps peak voltage to 45.4 V within nanoseconds, allowing downstream ceramic capacitors and controllers to survive without overvoltage shutdown. |
Use Scenario: Protects PoE-like 48 V DC feed lines in outdoor RRU enclosures exposed to induced lightning surges via long cable runs. IC Role / Device Role / Timing Role: Unidirectional TVS mounted at DC input connector, referenced to chassis ground to divert common-mode surge energy. Use Value: Delivers 1000 W surge handling with 72 °C/W thermal resistance, enabling stable operation at +85 °C ambient without derating loss. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28AHE3/A | Same VWM (28 V), VBR (31.1–34.4 V), and PPPM (1000 W), but commercial-grade (non-AEC-Q101) and RoHS-compliant only (not halogen-free). | Lacks automotive qualification; suitable for industrial/commercial designs where AEC-Q101 is not mandated. | Select SMBJ28AHE3/A only if automotive qualification and halogen-free content are not required. |
| SAC28 | Lower PPPM (600 W), same VWM (28 V); uses SOD-123FL package (smaller footprint, higher thermal resistance). | Not suitable for high-energy load dump; limited to low-power signal line protection due to 600 W rating and smaller pad area. | Choose SAC28 only for space-constrained, low-surge-risk applications where 1000 W capability is unnecessary. |
Compared with SMBJ28AHE3/A and SAC28, SMB10J28AHM3/H uniquely combines AEC-Q101 qualification, halogen-free construction, and full 1000 W surge capacity in SMB package-making it the only option qualified for under-hood automotive power rail protection where both reliability and regulatory compliance are mandatory.
Availability
SMB10J28AHM3/H is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply with guaranteed halogen-free and AEC-Q101-compliant sourcing.
Supply support for SMB10J28AHM3/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 and application-specific performance.
SMB10J28AHM3/H belongs to Vishay's TRANSZORB® high-power TVS family, engineered specifically for robust transient suppression in harsh automotive and industrial environments where sustained surge energy and long-term stability are critical.
FAQ
What is the clamping voltage of SMB10J28AHM3/H at its rated peak pulse current?
The SMB10J28AHM3/H clamps to a maximum of 45.4 V when subjected to its rated 22.0 A peak pulse current (10/1000 µs waveform). This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during surge events, ensuring compatibility with 3.3 V and 5 V logic interfaces downstream.
Is SMB10J28AHM3/H qualified for automotive applications?
Yes, SMB10J28AHM3/H is AEC-Q101 qualified, as confirmed by Vishay's documentation and ordering code suffix "HM3" (halogen-free, RoHS-compliant, and AEC-Q101 qualified). It undergoes stress testing for temperature cycling, humidity bias, and mechanical shock required for under-hood and body electronics deployment.
What does the "HM3" suffix indicate in SMB10J28AHM3/H?
The "HM3" suffix in SMB10J28AHM3/H denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from commercial-grade versions (e.g., E3/M3) and confirms compliance with automotive environmental and reliability standards, including JESD201 Class 2 whisker resistance.
Can SMB10J28AHM3/H be used in bidirectional configurations?
No, SMB10J28AHM3/H is a unidirectional TVS diode, as indicated by its part number structure and electrical specifications (e.g., IFSM rating, absence of symmetrical VBR min/max for both polarities). For bidirectional protection, Vishay offers the SMB8J28CA series, which has different marking, ratings, and polarity behavior.
What is the thermal resistance of SMB10J28AHM3/H, and how does it affect layout design?
SMB10J28AHM3/H has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value requires adequate copper pour and thermal vias in PCB layout to maintain junction temperature below 150 °C during repeated surge events, especially in enclosed or high-ambient-temperature environments.
SMB10J28AHM3/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:
- 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:
- 45.4V
- Current - Peak Pulse (10/1000µs):
- 22A
- Power - Peak Pulse:
- 1000W (1kW)
- 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)
SMB10J28AHM3/H FAQ
1.How can I place an order for SMB10J28AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J28AHM3/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 SMB10J28AHM3/H reliable?
The price and inventory of SMB10J28AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J28AHM3/H is usually 5 days.
3.What payment methods are accepted for SMB10J28AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J28AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J28AHM3/H?
SMB10J28AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J28AHM3/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 SMB10J28AHM3/H?
For technical support, including SMB10J28AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J28AHM3/H requirements.
6.How does Aetrix verify that SMB10J28AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMB10J28AHM3/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 SMB10J28AHM3/H meets industry standards.
7.What is the process for return or replacement of SMB10J28AHM3/H?
All SMB10J28AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J28AHM3/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 SMB10J28AHM3/H part is unused and in its original packaging.
Return procedure for SMB10J28AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J28AHM3/H Tags
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