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Vishay General Semiconductor - Diodes Division SMB10J30AHM3/H
- Part No.:
- SMB10J30AHM3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J30AHM3/H.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,119
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Product details
Overview
SMB10J30AHM3/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 30 V stand-off voltage (VWM), 33.3–36.8 V breakdown voltage (VBR) at 1 mA, 1000 W peak pulse power (10/1000 µs), 20.7 A peak pulse current (IPPM), and clamps to ≤48.4 V under surge. It is AEC-Q101 qualified and halogen-free, targeting automotive power line protection.
For engineers reviewing the SMB10J30AHM3/H datasheet, SMB10J30AHM3/H pinout, SMB10J30AHM3/H application, or SMB10J30AHM3/H equivalent, key selection criteria include clamping voltage vs. protected IC's absolute maximum rating, surge current capability relative to system-level threat models (e.g., ISO 7637-2 Pulse 1/2a/5a), thermal derating above 25 °C, and AEC-Q101 qualification status for automotive deployment.
Technical Context
This device operates as a silicon avalanche diode with glass-passivated junction, enabling fast response (<1 ns) to transients and low incremental surge resistance. Its unidirectional polarity supports DC-biased rail protection where reverse conduction must be blocked during normal operation.
The SMB10J30AHM3/H is rated for 100 A non-repetitive forward surge current (IFSM, 8.3 ms half-sine), junction temperature range of –55 °C to +150 °C, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. Thermal resistance is 72 °C/W (junction-to-ambient, on 5.0 mm × 5.0 mm copper pads).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC bias margin for protected circuitry. |
| VBR min/max | 33.3 V / 36.8 V at 1 mA - Confirmed breakdown threshold range; ensures reliable turn-on before downstream component overvoltage. |
| VC @ IPPM | ≤48.4 V at 20.7 A - Clamping voltage under 10/1000 µs surge; must stay below protected IC's absolute max rating (e.g., 50 V for many automotive MCUs). |
| PPPM | 1000 W - Peak pulse power handling (10/1000 µs waveform); determines survivability against ISO 7637-2 Pulse 5a (load dump) events. |
| ID @ VWM | ≤1.0 µA - Reverse leakage at 30 V; negligible power loss and noise contribution in standby. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments with proper PCB thermal design. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; required for powertrain and body control modules. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, halogen-free, RoHS-compliant, matte tin-plated leads. Cathode indicated by color band; polarity critical for unidirectional operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-impedance return path; completes clamping loop during surge. |
| Cathode | High-side connection point | Connected to protected line (e.g., 24 V battery rail); conducts avalanche current when Vline exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and humidity exposure; eliminates risk of junction corrosion in harsh automotive environments. |
| Low profile SMB package | Height ≤0.086" (2.20 mm); enables compact placement near connectors or ECUs without interfering with mechanical enclosures. |
| AEC-Q101 qualification | Validated for automotive applications including temperature cycling (–40 °C to +125 °C), HTRB (1000 hrs @ TJ = 150 °C), and ESD (HBM ≥8 kV). |
| 1000 W peak pulse power | Withstands ISO 7637-2 Pulse 5a (load dump) up to 100 V/10 Ω source impedance without failure when mounted per recommended pad layout. |
| MSL Level 1 | Compatible with standard SMT reflow profiles up to 260 °C peak; no baking required prior to assembly. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply input of engine control unit (ECU) against load dump surges per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor; clamps transients within nanoseconds. Use Value: Limits voltage seen by downstream DC/DC converter to ≤48.4 V, preventing overvoltage damage while maintaining AEC-Q101 compliance. |
Use Scenario: Safeguarding analog output line (e.g., 4–20 mA transmitter) from ESD and inductive switching noise in factory automation. IC Role / Device Role / Timing Role: TVS connected across signal and ground; absorbs fast transients induced by relay coil de-energization. Use Value: Prevents latch-up or parametric shift in precision DACs and op-amps by limiting peak reverse voltage to ≤48.4 V with <1 ns response. |
| Consumer Power Adapter Input | Telecom DC Feeder Line Protection |
|
Use Scenario: Secondary-side overvoltage suppression in 12 V wall adapter supplying USB-C PD controller and PMIC. IC Role / Device Role / Timing Role: Unidirectional clamp on regulated 12 V output rail; activated only during fault conditions. Use Value: Maintains ≤1 µA leakage at 12 V, avoiding standby power penalty, while delivering 1000 W surge immunity for UL 62368-1 compliance. |
Use Scenario: Protecting -48 V DC feeder line in telecom base station power distribution board from lightning-induced surges. IC Role / Device Role / Timing Role: TVS installed at cabinet entry point, cathode tied to -48 V rail, anode to ground reference. Use Value: Withstands 20.7 A surge current (10/1000 µs) without degradation, ensuring continuity of power to remote radio units during transient events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30AHE3/A | Same VWM (30 V), VBR (33.3–36.8 V), and PPPM (1000 W); differs in packaging suffix (E3 vs HM3) - RoHS-compliant but not halogen-free. | Lacks halogen-free certification; acceptable for commercial/industrial use but not automotive programs requiring IEC 61249-2-21 compliance. | Select SMBJ30AHE3/A only if halogen-free material is not mandated; otherwise SMB10J30AHM3/H is preferred for Tier 1 automotive sourcing. |
| 1.5SMC33A | Higher VWM (33 V), lower PPPM (1500 W), larger SMC (DO-214AB) package; clamping voltage 53.3 V at 28.3 A. | Physically incompatible (larger footprint); higher clamping voltage may exceed protected IC limits; suitable only where board space allows and Vclamp margin permits. | Choose 1.5SMC33A only when higher surge energy (1500 W) is required and PCB layout accommodates SMC package; not a drop-in replacement. |
Compared with SMBJ30AHE3/A, SMB10J30AHM3/H adds halogen-free compliance for automotive supply chains; compared with 1.5SMC33A, it offers tighter clamping (48.4 V vs 53.3 V) and smaller SMB footprint, enabling denser layouts in space-constrained ECUs.
Availability
SMB10J30AHM3/H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom DC power distribution systems requiring stable component supply, AEC-Q101 qualification, and halogen-free materials compliance.
Supply support for SMB10J30AHM3/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 designs and manufactures discrete semiconductors, including diodes, MOSFETs, and optoelectronics, with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMB10J series is part of Vishay's TRANSZORB® TVS portfolio, engineered specifically for high-power-density transient suppression in automotive, industrial, and telecom power systems where robustness and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMB10J30AHM3/H under a 10/1000 µs surge?
The SMB10J30AHM3/H clamps to a maximum of 48.4 V when subjected to its rated peak pulse current of 20.7 A (10/1000 µs waveform). This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet Document Number 88422, page 2. The clamping performance ensures protected downstream components-such as automotive MCUs or power management ICs-remain within their absolute maximum voltage ratings during surge events. Designers must verify that this VC level provides sufficient margin above the protected circuit's VMAX.
Is SMB10J30AHM3/H suitable for automotive applications?
Yes, SMB10J30AHM3/H is AEC-Q101 qualified and explicitly designated for automotive use via its HM3 suffix (halogen-free, RoHS-compliant, and AEC-Q101 qualified). It has passed stress tests including temperature cycling, high-temperature reverse bias (HTRB), and human-body model ESD (≥8 kV). The SMB10J30AHM3/H is commonly deployed in engine control units, body control modules, and ADAS power supplies where ISO 7637-2 compliance and long-term reliability under thermal cycling are required.
How does the SMB10J30AHM3/H differ from SMBJ30AHE3/A?
The SMB10J30AHM3/H and SMBJ30AHE3/A share identical electrical specs-30 V VWM, 33.3–36.8 V VBR, 1000 W PPPM, and 48.4 V VC-but differ in material compliance: HM3 denotes halogen-free construction per IEC 61249-2-21, while E3 is RoHS-compliant only. Both are AEC-Q101 qualified and packaged in SMB (DO-214AA), but SMB10J30AHM3/H is specified for automotive Tier 1 supply chains requiring halogen-free content. The marking code "HM3" replaces "HE3" in the ordering nomenclature.
What is the thermal resistance of SMB10J30AHM3/H, and how does it affect layout?
The SMB10J30AHM3/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 assumes minimum recommended pad layout per Vishay's outline drawing. To maintain safe junction temperatures under repeated surges, designers must ensure adequate copper area and avoid excessive trace length between the SMB10J30AHM3/H and ground/power planes. Derating curves in Figure 2 of datasheet 88422 show >50% power reduction above 75 °C ambient.
Can SMB10J30AHM3/H be used in bidirectional configurations?
No, SMB10J30AHM3/H is a unidirectional TVS diode, as indicated by its "J" (not "JCA") designation and cathode band marking. Bidirectional variants-such as SMB8J30CA-exist in the same family but have different internal construction and symmetric breakdown behavior. Using SMB10J30AHM3/H in a bidirectional application would result in unintended forward conduction during negative transients, potentially damaging the device or failing to protect the circuit. Always match device polarity to system bias requirements.
SMB10J30AHM3/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):
- 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:
- 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)
SMB10J30AHM3/H FAQ
1.How can I place an order for SMB10J30AHM3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J30AHM3/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 SMB10J30AHM3/H reliable?
The price and inventory of SMB10J30AHM3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J30AHM3/H is usually 5 days.
3.What payment methods are accepted for SMB10J30AHM3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J30AHM3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J30AHM3/H?
SMB10J30AHM3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J30AHM3/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 SMB10J30AHM3/H?
For technical support, including SMB10J30AHM3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J30AHM3/H requirements.
6.How does Aetrix verify that SMB10J30AHM3/H is sourced from the original manufacturer or authorized distributors?
All SMB10J30AHM3/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 SMB10J30AHM3/H meets industry standards.
7.What is the process for return or replacement of SMB10J30AHM3/H?
All SMB10J30AHM3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J30AHM3/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 SMB10J30AHM3/H part is unused and in its original packaging.
Return procedure for SMB10J30AHM3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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