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Taiwan Semiconductor Corporation SMB10J30AH
- Part No.:
- SMB10J30AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J30AH.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,700
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Product details
Overview
SMB10J30AH from Taiwan Semiconductor is a unidirectional 1000W transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, with 30V standoff voltage (VWM), 33.3–36.8V breakdown voltage (VBR @ 1mA), and 48.4V clamping voltage (VC @ 20.7A). It delivers AEC-Q101 qualification and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and inductive switching protection.
For engineers reviewing the SMB10J30AH datasheet, SMB10J30AH pinout, SMB10J30AH application, or SMB10J30AH equivalent, key selection factors include its 1000W peak pulse power rating, sub-1ps response time, glass-passivated junction, RoHS/halogen-free compliance, and suitability for ESD and electrical fast transient (EFT) protection in 12V/24V automotive subsystems.
Technical Context
This unidirectional TVS diode operates as a shunt-clamping device during voltage transients, diverting surge current away from sensitive downstream circuitry while maintaining low leakage (<1µA @ 30V) under normal bias. Its glass-passivated junction ensures stable VBR tolerance and long-term reliability under thermal cycling.
The SMB10J30AH is rated for 175°C maximum junction temperature and features a junction-to-lead thermal resistance of 20°C/W, enabling effective heat dissipation in high-density PCB layouts. It supports automated SMT placement and complies with JESD201 Class 2 whisker resistance and J-STD-020 MSL Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 33.3 V / 36.8 V - Breakdown occurs within this range at 1 mA test current |
| VC @ IPPM | 48.4 V - Clamped voltage across device at 20.7 A peak pulse current |
| PPK | 1000 W - Peak pulse power handling capability per 1 ms waveform (10/1000 µs) |
| TJ max | 175 °C - Maximum allowable junction temperature for reliable operation |
| Response time | <1.0 ps - Enables suppression of nanosecond-scale ESD and EFT events |
| Package | DO-214AA (SMB) - Surface-mount, low-profile package with cathode band marking |
Pinout & Package
DO-214AA (SMB) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band; weight ≈ 0.110 g; UL 94V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal under forward bias | Connected to system ground or lower-potential rail in unidirectional TVS configuration |
| Cathode | Current exit terminal under forward bias; high-impedance terminal under reverse bias until clamping | Connected to protected line (e.g., CAN_H, LIN, sensor supply); marked by band on package |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per JEDEC standards |
| Glass-passivated junction | Enhances long-term stability of VBR and reduces parameter drift over life and temperature |
| ISO 7637-2 compliance | Withstands defined automotive transient waveforms (Pulse 1, 2a, 2b, 3a, 3b) without degradation |
| MSL Level 1 | No floor-life limitation or bake requirement prior to reflow; suitable for standard SMT assembly |
| Halogen-free & RoHS | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained applications |
Applications
| Automotive Lighting Control | Body Control Module (BCM) Power Input |
|---|---|
Use Scenario: Protecting LED driver ICs and microcontrollers from load-dump spikes during alternator regulation faults. IC Role / Device Role / Timing Role: Shunt-clamping TVS placed between 12V supply rail and ground, activated within <1 ps to clamp transients to ≤48.4 V. Use Value: Prevents latch-up or permanent damage to 3.3V/5V logic rails downstream of DC-DC converters in headlamp modules. | Use Scenario: Safeguarding power management ICs in BCMs against inductive kickback from relay and solenoid switching. IC Role / Device Role / Timing Role: Unidirectional TVS connected to fused battery input, clamping reverse-energy transients up to 1000W peak. Use Value: Maintains functional safety integrity by limiting voltage excursions below 50V, preserving ASIL-B compliant power sequencing. |
| Infotainment System USB Port | Engine Control Unit (ECU) Sensor Interface |
Use Scenario: ESD protection for USB 2.0 data lines and VBUS supply in vehicle infotainment head units. IC Role / Device Role / Timing Role: Paired unidirectional TVS devices (e.g., SMB10J5.0AH on VBUS, SMB10J30AH on 12V auxiliary rail) provide coordinated clamping. Use Value: Ensures IEC 61000-4-2 ±15 kV contact discharge immunity without signal distortion or data corruption. | Use Scenario: Transient suppression on analog sensor supply lines (e.g., MAP, TPS, O2 sensors) exposed to engine bay noise. IC Role / Device Role / Timing Role: Standoff-rated TVS (30V VWM) placed upstream of LDO regulators to prevent overvoltage-induced regulator shutdown. Use Value: Guarantees uninterrupted sensor signal conditioning under ISO 7637-2 Pulse 3b (50 ns rise time, 100 V/m EFT injection). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ30A | Same DO-214AC (SMA) package; 30V VWM, 48.4V VC @ 20.7A, but 600W PPK rating | Lower peak power handling limits use in high-energy load-dump scenarios | Select SMB10J30AH when 1000W surge capacity is required per ISO 7637-2 Pulse 1 (12V systems) |
| Vishay SMF30A | DO-219AB (SOD-123FL) package; 30V VWM, 48.4V VC @ 20.7A, 200W PPK rating | Compact footprint but insufficient for automotive power-line transients | Prefer SMB10J30AH for under-hood 12V/24V power rail protection where space allows DO-214AA |
Compared with SMAJ30A and SMF30A, the SMB10J30AH provides 67% higher peak power rating than SMAJ30A and 400% higher than SMF30A-critical for meeting ISO 7637-2 Pulse 1 energy requirements in automotive power distribution networks.
Availability
SMB10J30AH is available at Aetrix Electronics and suitable for automotive lighting control, body control module (BCM) power inputs, and engine control unit (ECU) sensor interface applications requiring stable component supply and AEC-Q101-compliant transient protection.
Supply support for SMB10J30AH 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive and industrial markets.
The SMB10J30AH belongs to TSC's AEC-Q101-qualified SMB-series TVS family, engineered specifically for robust transient immunity in 12V/24V automotive power networks and industrial control systems.
FAQ
What is the clamping voltage of SMB10J30AH at its rated peak pulse current?
The SMB10J30AH has a maximum clamping voltage (VC) of 48.4 V at 20.7 A peak pulse current (IPPM), measured under the standardized 10/1000 µs waveform. This value ensures protected downstream components remain within safe operating voltage limits during ISO 7637-2 transients. The SMB10J30AH maintains consistent clamping performance across its specified junction temperature range of –55°C to +175°C.
Is SMB10J30AH suitable for bidirectional transient protection?
No, SMB10J30AH is a unidirectional TVS diode intended for DC-biased lines such as 12V/24V power rails. For bidirectional applications like data lines or AC-coupled signals, the SMB10J30CAH variant must be used. The SMB10J30AH features a cathode band marking and conducts only in reverse breakdown; applying significant reverse voltage beyond VWM will trigger clamping, but forward conduction is limited to 3.5 V at 50 A.
Does SMB10J30AH require derating at elevated ambient temperatures?
Yes, SMB10J30AH must be derated above TA = 25°C per the pulse derating curve in Figure 2 of its datasheet. At 85°C ambient, its 1000W peak pulse power rating drops to approximately 650W. Derating ensures junction temperature remains ≤175°C during transient events. The SMB10J30AH's RθJA of 100°C/W and RθJL of 20°C/W inform thermal design margins for PCB copper area and heatsinking.
What packaging format is offered for SMB10J30AH?
SMB10J30AH is supplied in tape-and-reel format with 3,000 units per reel, compatible with standard high-speed SMT pick-and-place equipment. The DO-214AA (SMB) package uses matte tin-plated leads that meet J-STD-002 solderability requirements. Each reel includes date code (YW), factory code (F), and green compound (G) markings per TSC's standard labeling convention for the SMB10J30AH.
How does SMB10J30AH meet automotive ESD and EFT immunity standards?
The SMB10J30AH achieves IEC 61000-4-2 ESD immunity (±15 kV contact) and IEC 61000-4-4 EFT immunity through sub-1 ps response time and low dynamic impedance during clamping. Its glass-passivated junction ensures repeatable triggering, while AEC-Q101 qualification validates robustness across temperature, humidity, and mechanical stress. The SMB10J30AH is routinely deployed in front-end protection circuits upstream of CAN transceivers and power management ICs.
SMB10J30AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMB10J
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 20.7A
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J30AH FAQ
1.How can I place an order for SMB10J30AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J30AH 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 SMB10J30AH reliable?
The price and inventory of SMB10J30AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J30AH is usually 5 days.
3.What payment methods are accepted for SMB10J30AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J30AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J30AH?
SMB10J30AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J30AH 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 SMB10J30AH?
For technical support, including SMB10J30AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J30AH requirements.
6.How does Aetrix verify that SMB10J30AH is sourced from the original manufacturer or authorized distributors?
All SMB10J30AH 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 SMB10J30AH meets industry standards.
7.What is the process for return or replacement of SMB10J30AH?
All SMB10J30AH units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J30AH, 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 SMB10J30AH part is unused and in its original packaging.
Return procedure for SMB10J30AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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