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Vishay General Semiconductor - Diodes Division SMB10J28AHM3_A/H
- Part No.:
- SMB10J28AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J28AHM3_A/H.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMB10J28AHM3_A/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 DC power rails 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 sensor power rail protection.
For engineers reviewing the SMB10J28AHM3_A/H datasheet, SMB10J28AHM3_A/H pinout, SMB10J28AHM3_A/H application, or SMB10J28AHM3_A/H equivalent, this page delivers verified electrical specs, automotive-grade qualification status, thermal resistance (RθJA = 72 °C/W), junction temperature range (−55 to +150 °C), and direct replacement guidance - all critical for ESD/surge design validation in harsh-environment electronics.
Technical Context
This TVS diode operates as a clamping device that enters avalanche conduction when reverse voltage exceeds its breakdown threshold (VBR = 31.1–34.4 V), limiting transient overvoltage to ≤45.4 V at 22.0 A. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM = 28 V) and fast response time (<1 ns), enabling protection of downstream MOSFETs and ICs against inductive switching spikes and ISO 7637-2 pulses.
Rated for 100 A non-repetitive forward surge (IFSM, 8.3 ms half-sine), it supports robust front-end protection in 12 V/24 V automotive systems. The SMB package provides low-profile surface-mount compatibility with automated placement and meets MSL level 1 (260 °C reflow peak), while halogen-free (HM3 suffix) and RoHS-compliant construction satisfies automotive material compliance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 24 V automotive systems. |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - Confirmed breakdown window ensures reliable turn-on without premature conduction during normal operation. |
| VC @ IPPM | ≤45.4 V at 22.0 A - Clamping voltage limits stress on protected ICs during 10/1000 µs transients per IEC 61000-4-5. |
| PPPM | 1000 W (10/1000 µs) - Sustains high-energy surges typical of load-dump and inductive kick events in vehicle ECUs. |
| RθJA | 72 °C/W - Thermal resistance enables effective heat dissipation on standard 0.2" × 0.2" copper pads without forced cooling. |
| TJ max | +150 °C - Junction temperature rating supports under-hood deployment in automotive environments. |
| AEC-Q101 | Qualified - Validated for automotive reliability including temperature cycling, HTRB, and ESD per AEC specification. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated leads. Cathode indicated by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to ground or low-impedance return plane; forms clamping loop with cathode. |
| Cathode | Protected line connection / surge input | Connected to line being protected (e.g., 24 V supply rail); avalanche conduction occurs here during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping | Enables asymmetric protection on positive-rail applications without interfering with normal forward bias operation. |
| AEC-Q101 qualification | Validates long-term reliability under automotive thermal, mechanical, and humidity stress profiles. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for sensitive 3.3 V/5 V logic interfaces. |
| MSL Level 1 | Supports standard SMT reflow without moisture-related popcorning or delamination risk. |
| Glass passivated junction | Ensures stable leakage current (<1.0 µA) and consistent VBR across temperature and lifetime. |
Applications
| Automotive Body Control Module (BCM) Power Input | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 24 V supply input of BCM against load-dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND, clamping surges before they reach LDOs and microcontrollers. Use Value: Limits transient voltage to ≤45.4 V, preserving 40 V-rated input capacitors and preventing latch-up in downstream PMICs. | Use Scenario: Safeguarding 24 V digital input channels of programmable logic controllers from field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Front-end TVS on each optocoupler input line, shunting energy before signal conditioning circuitry. Use Value: Withstands ≥22 A peak pulse current, ensuring immunity to 1 kV/500 Ω surge tests (IEC 61000-4-5) without degradation. |
| Automotive Camera Module Power Rail | Telecom Remote Radio Unit (RRU) Bias Supply |
Use Scenario: Securing 12 V power feed to ADAS camera modules exposed to engine bay EMI and ignition noise. IC Role / Device Role / Timing Role: Primary TVS on main power input, coordinated with secondary LC filtering to suppress both fast and slow transients. Use Value: Fast <1 ns response captures nanosecond-scale spikes from nearby solenoid actuation, preventing image sensor reset or corruption. | Use Scenario: Protecting 28 V bias supply feeding GaN power amplifiers in outdoor RRU enclosures subject to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS placed upstream of DC-DC converter, absorbing bulk surge energy before regulation stage. Use Value: 1000 W peak power rating handles multi-kA induced currents from nearby strikes without thermal runaway or parametric shift. |
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/H | Same VWM (28 V), identical SMB package, but rated for 600 W PPPM (vs. 1000 W); lower IPPM (13.3 A). | Not suitable for load-dump or high-energy ISO 7637-2 Pulse 5a; limited to lower-tier ESD/inductive spike protection. | Select only if system-level surge testing confirms <600 W requirement and cost sensitivity outweighs headroom needs. |
| 1.5SMC28A | Same VWM (28 V), higher PPPM (1500 W), but larger SMC (DO-214AB) package; RθJA ≈ 40 °C/W. | Requires PCB layout change; better thermal performance but incompatible with space-constrained SMB footprints. | Choose when thermal derating dominates and board area allows larger package; not drop-in compatible. |
Compared with SMBJ28AHE3_A/H and 1.5SMC28A, SMB10J28AHM3_A/H uniquely delivers 1000 W surge capability in the compact SMB footprint with AEC-Q101 qualification - making it the optimal choice for space-limited, high-reliability automotive power rail protection where both energy handling and qualification are mandatory.
Availability
SMB10J28AHM3_A/H is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply, AEC-Q101 compliance, and high-power transient suppression.
Supply support for SMB10J28AHM3_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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMB10JxxA series belongs to Vishay's high-power-density TRANSZORB® TVS family, engineered specifically for automotive and industrial surge protection where compact size, AEC-Q101 qualification, and 1000 W pulse handling are essential.
FAQ
What is the maximum clamping voltage of SMB10J28AHM3_A/H at its rated peak pulse current?
The SMB10J28AHM3_A/H has a maximum clamping voltage (VC) of 45.4 V when subjected to its rated peak pulse current (IPPM) of 22.0 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees predictable overvoltage limiting for protected circuits. The SMB10J28AHM3_A/H maintains this clamping performance across its full operating temperature range (−55 to +150 °C), as confirmed in Vishay Document Number 88422.
Is SMB10J28AHM3_A/H suitable for bidirectional signal line protection?
No - SMB10J28AHM3_A/H is a unidirectional TVS diode, intended for DC power rail protection where polarity is fixed (e.g., 24 V to ground). For bidirectional signal lines like RS-485 or USB data pairs, a bidirectional variant such as SMB8J28CAHM3_A/H must be used. The "J" in SMB10J28AHM3_A/H denotes unidirectional configuration, and its internal structure lacks symmetrical breakdown in both directions. Using SMB10J28AHM3_A/H on AC or dual-polarity signals risks failure or ineffective clamping.
Does SMB10J28AHM3_A/H meet automotive qualification standards?
Yes - SMB10J28AHM3_A/H carries the HM3 suffix, indicating halogen-free, RoHS-compliant, and AEC-Q101 qualified construction. It has passed stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 Rev D. The "_A/H" ordering code further specifies tape-and-reel packaging per automotive logistics requirements. This qualification is documented in Vishay's official datasheet (Rev. 09-Jan-2024, Doc. #88422) and applies specifically to the SMB10J28AHM3_A/H variant.
What is the thermal resistance junction-to-ambient (RθJA) for SMB10J28AHM3_A/H, and how is it measured?
The SMB10J28AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 72 °C/W, measured on a standard 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pad per terminal, per JEDEC JESD51-3. This value assumes no additional heatsinking and reflects real-world PCB layout conditions common in automotive modules. Because RθJA is highly layout-dependent, actual thermal performance may improve with enhanced copper pour or thermal vias - but 72 °C/W serves as the validated baseline for thermal design margining in the SMB10J28AHM3_A/H datasheet.
Can SMB10J28AHM3_A/H replace SMBJ28AHE3_A/H in an existing design without layout changes?
Yes - SMB10J28AHM3_A/H shares the identical SMB (DO-214AA) package, pinout, and solder pad layout with SMBJ28AHE3_A/H, enabling direct PCB footprint reuse. However, SMB10J28AHM3_A/H delivers 1000 W peak pulse power versus 600 W for SMBJ28AHE3_A/H, offering greater surge margin. No layout changes are required, but verify that downstream components can tolerate the slightly higher clamping voltage (45.4 V vs. 43.5 V for SMBJ28A) and that system-level testing validates the improved energy handling. The SMB10J28AHM3_A/H remains fully compatible with existing reflow profiles (MSL Level 1, 260 °C peak).
SMB10J28AHM3_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:
- 45.4V
- 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_A/H FAQ
1.How can I place an order for SMB10J28AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J28AHM3_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 SMB10J28AHM3_A/H reliable?
The price and inventory of SMB10J28AHM3_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 SMB10J28AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMB10J28AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J28AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J28AHM3_A/H?
SMB10J28AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J28AHM3_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 SMB10J28AHM3_A/H?
For technical support, including SMB10J28AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J28AHM3_A/H requirements.
6.How does Aetrix verify that SMB10J28AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMB10J28AHM3_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 SMB10J28AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMB10J28AHM3_A/H?
All SMB10J28AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J28AHM3_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 SMB10J28AHM3_A/H part is unused and in its original packaging.
Return procedure for SMB10J28AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J28AHM3_A/H Tags
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