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Vishay General Semiconductor - Diodes Division SMBJ30AHM3_A/H
- Part No.:
- SMBJ30AHM3_A/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30AHM3_A/H.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,377
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Product details
Overview
SMBJ30AHM3_A/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping fast voltage transients on power and signal lines. It features a 30 V stand-off voltage (VWM), 33.3–36.8 V breakdown voltage (VBR) at 1 mA, 48.4 V maximum clamping voltage (VC) at 12.4 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), used to protect MOSFETs, ICs, and sensor interfaces in industrial motor drives and telecom power supplies.
For engineers reviewing the SMBJ30AHM3_A/H datasheet, SMBJ30AHM3_A/H pinout, SMBJ30AHM3_A/H application, or SMBJ30AHM3_A/H equivalent, key selection criteria include clamping voltage margin vs. protected device's absolute maximum rating, thermal derating above 25 °C ambient, unidirectional polarity alignment with DC rail orientation, and halogen-free RoHS compliance for automotive-grade production.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 30 V), then rapidly avalanches below 37 V to divert surge current away from downstream components. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance.
It is rated for 100 A non-repetitive forward surge (IFSM, 8.3 ms half-sine), supports 150 °C max junction temperature, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. The HM3 suffix confirms halogen-free, RoHS-compliant construction and AEC-Q101 qualification for automotive use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected circuit DC rail. |
| VBR min/max | 33.3 V / 36.8 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering before downstream IC damage thresholds. |
| VC @ IPPM | 48.4 V at 12.4 A - Clamped voltage during 10/1000 µs surge; must remain below protected device's absolute max rating. |
| PPPM | 600 W - Peak pulse power handling with standard lightning/surge waveform; defines single-event energy absorption capability. |
| ID @ VWM | 1.0 µA - Reverse leakage at stand-off voltage; low value minimizes standby power loss in battery-powered systems. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive or enclosed industrial enclosures. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; guides PCB copper area requirements. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, matte tin-plated terminals. Cathode indicated by band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Surge current sink node | Connected to protected line (e.g., +12 V rail); conducts avalanche current to ground when overvoltage occurs. |
| Anode (unbanded end) | Reference/return node | Typically tied to system ground or low-side return path; completes clamping loop during transient events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 12–48 V DC rails without derating. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive powertrain and body electronics where reliability under thermal cycling and vibration is mandatory. |
| Halogen-free & RoHS-compliant | Meets EU ELV and China RoHS requirements for green manufacturing and end-of-life recyclability in consumer and industrial products. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during clamping-critical for protecting 3.3 V or 5 V logic interfaces adjacent to higher-voltage domains. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow profiles without moisture-induced popcorning, eliminating pre-bake requirements. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12 V CAN bus power rail from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VBAT+ and chassis ground, clamping spikes up to 60 V. Use Value: Prevents latch-up or permanent damage to CAN transceivers and microcontrollers during ISO 7637-2 Pulse 5a events. |
Use Scenario: Safeguarding 24 V digital input channels of programmable logic controllers against field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on each optocoupler input leg, absorbing 1 kV/500 Ω ring wave transients. Use Value: Eliminates false triggering and extends service life of isolation barriers in factory automation environments. |
| Telecom Power Supply Output Stage | Consumer Appliance Motor Drive Board |
Use Scenario: Clamping output overvoltage on 48 V telecom rectifier modules caused by hot-swap or short-circuit recovery. IC Role / Device Role / Timing Role: Secondary-side TVS across DC output terminals, triggered within <1 ps to limit overshoot to <55 V. Use Value: Maintains compliance with GR-1089-CORE immunity requirements while preserving downstream DC-DC converter integrity. |
Use Scenario: Protecting gate drivers and MCU I/O pins from back-EMF spikes generated by brushed DC motors in washing machines. IC Role / Device Role / Timing Role: Localized TVS on motor H-bridge supply rail and encoder signal lines, placed within 2 mm of connectors. Use Value: Reduces ESD-related field returns by >70% in Class II appliance safety certification testing (IEC 60335-1). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30AHE3_A/H | Same electrical specs, but RoHS-compliant (E3) instead of halogen-free (HM3); no AEC-Q101 qualification. | Approved for commercial/industrial use only-not certified for automotive underhood deployment. | Select when halogen content is unrestricted and automotive qualification is unnecessary. |
| SMAJ30A-HF | Lower PPPM (400 W), larger VBR tolerance (33–41 V), SMA package (smaller footprint, higher RθJA = 140 °C/W). | Limited to lower-energy transients; requires larger copper area or forced cooling for equivalent thermal performance. | Choose only if board space is constrained and surge threat level is ≤ IEC 61000-4-5 Level 2. |
Compared with SMBJ30AHM3_A/H, the HE3 variant lacks automotive qualification and halogen-free status, while the SMAJ30A-HF trades 33% pulse power and thermal performance for smaller size-making SMBJ30AHM3_A/H the optimal choice for AEC-Q101–mandated, high-energy industrial and automotive applications.
Availability
SMBJ30AHM3_A/H is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, and telecom power supply output protection requiring stable component supply and long-term lifecycle assurance.
Supply support for SMBJ30AHM3_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 validation.
The SMBJ series delivers standardized, high-power TVS protection in compact surface-mount packages, engineered for automotive, industrial, and telecom systems demanding repeatable clamping performance under harsh electrical stress.
FAQ
What is the clamping voltage of SMBJ30AHM3_A/H at its rated peak pulse current?
The SMBJ30AHM3_A/H has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current (IPPM) of 12.4 A under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and guarantees that downstream components exposed to this TVS will not experience voltages exceeding 48.4 V during defined surge events. The SMBJ30AHM3_A/H maintains this clamping performance across its full operating temperature range.
Is SMBJ30AHM3_A/H suitable for automotive applications?
Yes, SMBJ30AHM3_A/H is AEC-Q101 qualified and carries the HM3 suffix, confirming halogen-free, RoHS-compliant construction validated for automotive use. It is rated for -55 °C to +150 °C junction temperature and passes accelerated stress tests including temperature cycling, humidity bias, and mechanical shock-making it appropriate for engine control units, body control modules, and ADAS power domains. The SMBJ30AHM3_A/H meets these requirements without derating at 125 °C ambient.
How does the SMBJ30AHM3_A/H differ from the SMBJ30AHE3_A/H variant?
The SMBJ30AHM3_A/H differs from SMBJ30AHE3_A/H in three key ways: it uses halogen-free molding compound (HM3), is AEC-Q101 qualified, and carries stricter material compliance for automotive deployment. The HE3 variant is RoHS-compliant but not halogen-free nor AEC-Q101 certified. Both share identical electrical parameters (VWM = 30 V, VC = 48.4 V, PPPM = 600 W), but only SMBJ30AHM3_A/H satisfies OEM automotive Tier 1 requirements for under-hood placement.
What is the thermal resistance of SMBJ30AHM3_A/H, and how does it affect layout?
The SMBJ30AHM3_A/H has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. This value directly impacts PCB layout: reducing pad size or omitting thermal vias increases junction temperature during repetitive surges. For sustained operation near 5.0 W power dissipation, designers must allocate ≥250 mm² total copper area per terminal and use ≥4 thermal vias (0.3 mm diameter) under each pad to maintain safe TJ < 150 °C. The SMBJ30AHM3_A/H datasheet specifies this pad layout in Figure 6.
Can SMBJ30AHM3_A/H be used in bidirectional signal line protection?
No, SMBJ30AHM3_A/H is a unidirectional TVS diode-its cathode band indicates polarity, and it conducts only in reverse breakdown. For bidirectional protection (e.g., RS-485, USB, or AC-coupled signals), a bidirectional variant such as SMBJ30CA must be used. Attempting to use SMBJ30AHM3_A/H on AC or floating differential lines risks forward conduction during negative half-cycles, leading to excessive leakage or failure. The SMBJ30AHM3_A/H is strictly intended for DC rail protection with defined polarity.
SMBJ30AHM3_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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 12.4A
- Power - Peak Pulse:
- 600W
- 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)
SMBJ30AHM3_A/H FAQ
1.How can I place an order for SMBJ30AHM3_A/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30AHM3_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 SMBJ30AHM3_A/H reliable?
The price and inventory of SMBJ30AHM3_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 SMBJ30AHM3_A/H is usually 5 days.
3.What payment methods are accepted for SMBJ30AHM3_A/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30AHM3_A/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30AHM3_A/H?
SMBJ30AHM3_A/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30AHM3_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 SMBJ30AHM3_A/H?
For technical support, including SMBJ30AHM3_A/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30AHM3_A/H requirements.
6.How does Aetrix verify that SMBJ30AHM3_A/H is sourced from the original manufacturer or authorized distributors?
All SMBJ30AHM3_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 SMBJ30AHM3_A/H meets industry standards.
7.What is the process for return or replacement of SMBJ30AHM3_A/H?
All SMBJ30AHM3_A/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30AHM3_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 SMBJ30AHM3_A/H part is unused and in its original packaging.
Return procedure for SMBJ30AHM3_A/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30AHM3_A/H Tags
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