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Vishay General Semiconductor - Diodes Division SMB10J12AHM3_B/H
- Part No.:
- SMB10J12AHM3_B/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J12AHM3_B/H.pdf
- Description:
- 1KW,12V 5%,UNIDIR,SMB TVS
- Quantity:
- Payment:
- Shipping:
Inventory:6,546
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Product details
Overview
SMB10J12AHM3_B/H from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for high-energy surge protection with 1000 W peak pulse power (10/1000 µs), 12 V stand-off voltage (VWM), and 19.9 V clamping voltage (VC) at 50.3 A peak pulse current. It is AEC-Q101 qualified and halogen-free, targeting automotive power line and sensor interface protection.
For engineers reviewing the SMB10J12AHM3_B/H datasheet, SMB10J12AHM3_B/H pinout, SMB10J12AHM3_B/H application, or SMB10J12AHM3_B/H equivalent, this device is selected for robust ESD/surge immunity in 12 V automotive subsystems where low clamping voltage, fast response (<1 ns), and MSL Level 1 reflow compatibility are critical design requirements.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal bias it presents <1 µA leakage at 12 V (VWM), then rapidly avalanches when transient voltage exceeds its 13.3–14.7 V breakdown range (VBR at 1 mA), limiting downstream voltage to ≤19.9 V at 50.3 A. Its glass-passivated junction ensures stable parametric performance across temperature.
Thermally, it features RθJA = 72 °C/W and RθJL = 20 °C/W, enabling reliable operation up to TJ = +150 °C. The SMB package supports automated placement and meets UL 94 V-0 flammability rating, with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102 solderability standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 12 V nominal systems. |
| VBR (min/max) | 13.3 V / 14.7 V at 1 mA - guaranteed avalanche initiation window; ensures predictable turn-on without premature conduction. |
| VC @ IPPM | 19.9 V at 50.3 A - clamped voltage during 10/1000 µs surge; determines maximum stress on protected IC or MOSFET gate. |
| PPPM | 1000 W - peak pulse power handling capability; enables protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| ID @ VWM | ≤5.0 µA - ultra-low reverse leakage at rated stand-off; minimizes quiescent power loss in always-on automotive modules. |
| TJ max. | +150 °C - maximum junction temperature; supports under-hood deployment in engine control units and body electronics. |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including HTOL, TC, UHAST, and ESD testing per AEC specification. |
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); recommended pad layout: 5.59 mm × 2.18 mm copper area per terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | High-side connection to protected line | Reverse-biased during normal operation; conducts surge current to ground when overvoltage occurs. |
| Anode | Ground reference node | Low-impedance return path for clamped surge energy; must connect to solid chassis or power ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Halogen-free & RoHS-compliant | Meets automotive environmental mandates (Vishay HM3 suffix); eliminates brominated flame retardants without sacrificing UL 94 V-0 rating. |
| Glass-passivated junction | Ensures stable VBR and low leakage over 1000+ thermal cycles; prevents parameter drift in harsh automotive environments. |
| MSL Level 1 (260 °C peak) | Supports lead-free reflow without popcorn cracking or delamination; eliminates pre-bake requirement in SMT lines. |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (e.g., load dump), improving protection margin for sensitive 12 V logic interfaces. |
| Automated placement optimized | Standardized SMB footprint and matte tin plating ensure >99.9% placement yield on high-speed pick-and-place equipment. |
Applications
| Automotive Power Line Protection | Engine Control Unit (ECU) Sensor Interface |
|---|---|
Use Scenario: Protecting 12 V supply rail of body control module against ISO 7637-2 load dump (up to 60 V, 400 ms) and jump-start transients. IC Role / Device Role / Timing Role: Shunt TVS placed between battery input and DC-DC converter input stage. Use Value: Clamps surge to ≤19.9 V, preventing damage to 36 V-rated input capacitors and enabling use of cost-optimized 24 V input regulators. |
Use Scenario: Safeguarding analog inputs of pressure/temperature sensors connected to ECU via long harnesses susceptible to coupled noise. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) unidirectional TVS mounted directly at connector entry point. Use Value: Sub-1 ns response time limits induced voltage spike duration, preserving signal integrity of millivolt-level sensor outputs. |
| Industrial CAN Bus Node | Consumer Appliance Motor Drive |
Use Scenario: Protecting CANH/CANL lines in automotive gateway modules exposed to ESD (±8 kV contact) and burst noise per ISO 11898-2. IC Role / Device Role / Timing Role: Paired unidirectional SMB10J12AHM3_B/H devices on each bus line referenced to common ground. Use Value: 12 V VWM aligns with CAN recessive level margin; 19.9 V VC avoids false dominant state triggering during transients. |
Use Scenario: Suppressing inductive kickback from brushed DC motor commutation in smart washing machine control boards. IC Role / Device Role / Timing Role: Mounted across motor terminals to clamp flyback voltage spikes during PWM switching. Use Value: 1000 W PPPM handles repetitive 50 A surge peaks; AEC-Q101 qualification ensures longevity in thermally cycling appliance environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMB10J12AHE3_B/H | Same electrical specs but RoHS-compliant (non-halogen-free); lacks halogen-free certification. | Acceptable for commercial/industrial use; not approved for halogen-free automotive programs. | Select SMB10J12AHM3_B/H when compliance with VW 80101 or GMW3172 halogen restrictions is mandatory. |
| SMBJ12A-M3/52 | Same SMB package and 12 V VWM, but lower PPPM (600 W) and higher VC (23.2 V at 26.7 A). | Suitable for less severe surge environments (e.g., consumer USB ports); insufficient for ISO 7637-2 Pulse 5a. | Choose SMB10J12AHM3_B/H where full 1000 W surge immunity and tighter clamping are required. |
Compared with SMB10J12AHE3_B/H and SMBJ12A-M3/52, SMB10J12AHM3_B/H delivers superior surge robustness (1000 W vs. 600 W), lower clamping (19.9 V vs. 23.2 V), and halogen-free compliance-making it the optimal choice for AEC-Q101–mandated automotive power rail protection.
Availability
SMB10J12AHM3_B/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and consumer appliance motor drives requiring stable component supply with full traceability and lifecycle management.
Supply support for SMB10J12AHM3_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, and protection devices with emphasis on reliability, efficiency, and automotive-grade validation.
The SMB10J series is engineered specifically for high-power transient suppression in 12 V and 24 V automotive systems, balancing low clamping voltage, high surge capacity, and AEC-Q101 compliance.
FAQ
What is the clamping voltage of SMB10J12AHM3_B/H at its rated peak pulse current?
The SMB10J12AHM3_B/H has a maximum clamping voltage (VC) of 19.9 V at its specified peak pulse current (IPPM) of 50.3 A under a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees that protected circuitry downstream will not experience voltages exceeding 19.9 V during standardized surge events, making SMB10J12AHM3_B/H suitable for safeguarding 24 V-tolerant ICs in automotive applications.
Is SMB10J12AHM3_B/H compatible with lead-free reflow soldering processes?
Yes, SMB10J12AHM3_B/H is rated for MSL Level 1 per J-STD-020 with a maximum peak reflow temperature of 260 °C, fully supporting lead-free soldering profiles. Its matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability requirements, and the glass-passivated junction ensures no degradation during thermal cycling-critical for repeatable manufacturing yield of SMB10J12AHM3_B/H in high-volume SMT lines.
How does the halogen-free status of SMB10J12AHM3_B/H impact its use in automotive programs?
The HM3 suffix in SMB10J12AHM3_B/H certifies halogen-free construction per IEC 61249-2-21, satisfying stringent OEM requirements such as VW 80101 and GMW3172. Unlike standard RoHS variants (e.g., HE3), SMB10J12AHM3_B/H contains no brominated or chlorinated flame retardants-reducing toxic gas emission during end-of-life recycling and enabling qualification in premium-tier automotive platforms where halogen content is audited and restricted.
Can SMB10J12AHM3_B/H be used in bidirectional signal line protection?
No, SMB10J12AHM3_B/H is a unidirectional TVS diode, identified by its cathode band marking and specified only for single-polarity surge suppression. For bidirectional applications like AC lines or differential buses (e.g., RS-485), Vishay offers the SMB8J12CA variant-same VWM and package but symmetrical breakdown. Using SMB10J12AHM3_B/H on bidirectional signals would result in forward conduction during negative half-cycles, potentially damaging the device or circuit.
What is the maximum operating junction temperature for SMB10J12AHM3_B/H, and how does it affect board layout?
The SMB10J12AHM3_B/H has a maximum junction temperature (TJ max.) of +150 °C, enabling deployment in under-hood environments. To maintain safe operation, PCB layout must provide adequate copper thermal relief: Vishay specifies 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, yielding RθJA = 72 °C/W. Reducing pad size increases thermal resistance, risking premature thermal runaway during repeated surge events-so proper layout is essential for sustained reliability of SMB10J12AHM3_B/H.
SMB10J12AHM3_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):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 50.3A
- 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)
SMB10J12AHM3_B/H FAQ
1.How can I place an order for SMB10J12AHM3_B/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J12AHM3_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 SMB10J12AHM3_B/H reliable?
The price and inventory of SMB10J12AHM3_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 SMB10J12AHM3_B/H is usually 5 days.
3.What payment methods are accepted for SMB10J12AHM3_B/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J12AHM3_B/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J12AHM3_B/H?
SMB10J12AHM3_B/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J12AHM3_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 SMB10J12AHM3_B/H?
For technical support, including SMB10J12AHM3_B/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J12AHM3_B/H requirements.
6.How does Aetrix verify that SMB10J12AHM3_B/H is sourced from the original manufacturer or authorized distributors?
All SMB10J12AHM3_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 SMB10J12AHM3_B/H meets industry standards.
7.What is the process for return or replacement of SMB10J12AHM3_B/H?
All SMB10J12AHM3_B/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J12AHM3_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 SMB10J12AHM3_B/H part is unused and in its original packaging.
Return procedure for SMB10J12AHM3_B/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J12AHM3_B/H Tags
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