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Vishay General Semiconductor - Diodes Division SMB10J20AHE3/5B
- Part No.:
- SMB10J20AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J20AHE3/5B.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,891
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Product details
Overview
SMB10J20AHE3/5B 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 20 V stand-off voltage (VWM), 22.2–24.5 V breakdown voltage (VBR) at 1 mA, 32.4 V clamping voltage (VC) at 30.9 A peak pulse current (IPPM), and 1000 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive ECUs, industrial sensor interfaces, and power supply input stages.
For engineers reviewing the SMB10J20AHE3/5B datasheet, SMB10J20AHE3/5B pinout, SMB10J20AHE3/5B application, or SMB10J20AHE3/5B equivalent, key selection criteria include AEC-Q101 qualification, unidirectional polarity with cathode band marking, low incremental surge resistance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below VWM (20 V), triggers avalanche conduction at VBR (min 22.2 V), and limits transient-induced voltage to ≤32.4 V during 10/1000 µs surges up to 30.9 A. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns).
Thermal performance is defined by RθJA = 72 °C/W and RθJL = 20 °C/W, enabling reliable operation up to TJ = +150 °C. The device meets MSL Level 1 per J-STD-020 with peak reflow temperature of 260 °C and is qualified to AEC-Q101 for automotive under-hood applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - maximum continuous reverse operating voltage before leakage exceeds 1 µA; defines safe DC rail operating margin. |
| VBR (min/max) | 22.2 V / 24.5 V at IT = 1 mA - guaranteed avalanche initiation range; ensures consistent turn-on across production lots. |
| VC @ IPPM | 32.4 V at IPPM = 30.9 A (10/1000 µs) - clamped voltage seen by protected IC during worst-case surge; determines downstream component stress. |
| PPPM | 1000 W - peak transient energy handling capacity; supports IEC 61000-4-5 Level 4 (4 kV) surge immunity when properly laid out. |
| IFSM | 100 A (8.3 ms half-sine) - surge current rating for non-repetitive forward events; validates robustness against load dump transients. |
| TJ max. | +150 °C - maximum junction temperature; enables use in engine control modules and industrial enclosures without derating. |
| Polarity | Unidirectional - cathode-band marked; blocks reverse voltage up to VWM and clamps positive transients only. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H); polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point | Connected to lower-potential side (e.g., ground or return path); conducts during positive transients when cathode is at higher potential. |
| Cathode | Avalanche clamping node | Marked with color band; connected to protected line (e.g., 24 V rail); sinks surge current into anode during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock - required for ECU, ADAS, and body control modules. |
| Glass passivated junction | Eliminates surface contamination sensitivity and improves long-term VBR stability under thermal/humidity stress vs. epoxy-passivated alternatives. |
| Low profile SMB package | Enables high-density PCB layouts and compatibility with standard pick-and-place equipment; footprint matches industry-standard DO-214AA land pattern. |
| MSL Level 1 rating | Allows unlimited floor life and single-reflow processing at 260 °C peak - eliminates baking requirements and reduces manufacturing overhead. |
| 1000 W peak pulse power | Provides headroom for 4 kV IEC 61000-4-5 surge testing with margin when mounted on 5.0 mm × 5.0 mm copper pads per datasheet layout. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 24 V supply inputs in engine control units against load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Clamping transient overvoltage on main power bus upstream of DC/DC converters and microcontrollers. Use Value: Limits voltage to ≤32.4 V during 1000 W surges, preventing latch-up or gate oxide damage in downstream PMICs and MCUs. |
Use Scenario: Safeguarding analog outputs (e.g., 4–20 mA loops) and digital I/O (CAN, LIN) in factory automation sensors. IC Role / Device Role / Timing Role: Bidirectional suppression not applicable; unidirectional SMB10J20AHE3/5B placed on VCC-side of isolated signal conditioning stage. Use Value: Maintains <1 µA leakage at 20 V, avoiding offset errors in precision current sources while clamping ESD and inductive kickback. |
| Telecom DC Power Input Stage | Consumer Appliance Motor Drive Protection |
|
Use Scenario: Front-end surge protection for PoE-powered network switches and base station remote radios. IC Role / Device Role / Timing Role: Primary TVS on 48 V input rail ahead of active OR-ing controllers and hot-swap FETs. Use Value: Withstands repetitive 10/1000 µs surges up to 30.9 A without degradation, meeting Telcordia GR-1089-CORE Level 3 requirements. |
Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Mounted across motor terminals or on H-bridge supply rail to clamp inductive flyback energy. Use Value: 100 A IFSM rating handles 8.3 ms motor stall currents; 32.4 V clamping prevents MOSFET avalanche failure during rapid PWM switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A-E3/52 | Same VWM (20 V), VBR (22.2–24.5 V), and PPPM (1000 W), but commercial-grade (non-AEC-Q101) and RoHS-compliant only (no halogen-free option). | Lacks automotive qualification; suitable for industrial/commercial power supplies where AEC-Q101 is not mandated. | Select SMBJ20A-E3/52 for cost-sensitive non-automotive designs requiring identical electrical specs but no automotive reliability validation. |
| 1.5SMC20A | Same VWM and clamping performance, but larger SMC (DO-214AB) package (7.11 mm × 6.22 mm); RθJA = 30 °C/W vs. 72 °C/W for SMB10J20AHE3/5B. | Higher thermal mass allows higher average power handling but requires more PCB area; less suitable for space-constrained automotive modules. | Choose 1.5SMC20A when board layout permits larger footprint and thermal management prioritizes steady-state dissipation over surge density. |
Compared with SMBJ20A-E3/52, SMB10J20AHE3/5B adds AEC-Q101 qualification and halogen-free compliance; compared with 1.5SMC20A, it delivers equivalent surge protection in 45% smaller footprint but requires tighter thermal design due to higher RθJA.
Availability
SMB10J20AHE3/5B is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, telecom power inputs, and consumer appliance motor drives requiring stable component supply with full traceability and lifecycle support.
Supply support for SMB10J20AHE3/5B 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 SMB10J series belongs to Vishay's TRANSZORB® TVS portfolio, engineered for high-power-density transient suppression in harsh environments - particularly targeting automotive, industrial, and telecom systems demanding AEC-Q101 compliance and robust surge immunity.
FAQ
What is the clamping voltage of SMB10J20AHE3/5B at its rated peak pulse current?
The SMB10J20AHE3/5B has a maximum clamping voltage (VC) of 32.4 V when subjected to its rated peak pulse current (IPPM) of 30.9 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures protected circuitry sees no more than 32.4 V during worst-case surge events - critical for safeguarding 3.3 V or 5 V logic interfaces downstream of the SMB10J20AHE3/5B.
Is SMB10J20AHE3/5B suitable for automotive applications?
Yes, SMB10J20AHE3/5B is AEC-Q101 qualified and manufactured with halogen-free, RoHS-compliant materials - explicitly designated for automotive use via the "HE3" suffix. It is validated for temperature cycling, mechanical shock, and humidity bias per AEC-Q101, making SMB10J20AHE3/5B appropriate for engine control units, body electronics, and ADAS sensor modules where reliability under vibration and thermal stress is mandatory.
What does the "5B" in SMB10J20AHE3/5B indicate?
The "5B" in SMB10J20AHE3/5B specifies the packaging format: 13-inch diameter plastic tape and reel containing 3200 units. This differs from "52", which denotes 7-inch reels of 750 units. The "HE3" suffix confirms RoHS-compliance and AEC-Q101 qualification, while "5B" ensures compatibility with high-volume SMT assembly lines requiring large-reel feeding - a key detail for production planning of SMB10J20AHE3/5B.
How does SMB10J20AHE3/5B differ from bidirectional TVS diodes like SMB8J20CA?
SMB10J20AHE3/5B is unidirectional and features a cathode band marking, conducting only during positive transients relative to its anode. In contrast, SMB8J20CA is bidirectional with no polarity marking and clamps both polarities - useful for AC lines or differential buses. SMB10J20AHE3/5B offers higher PPPM (1000 W vs. 800 W) and lower clamping voltage consistency for DC rail protection, whereas SMB8J20CA suits symmetrical surge environments like telecom data lines.
What is the thermal resistance of SMB10J20AHE3/5B, and how does it affect layout?
SMB10J20AHE3/5B 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 relatively high RθJA means PCB layout must maximize copper area and thermal vias to avoid exceeding TJ = +150 °C during repeated surges. Unlike lower-RθJA packages, SMB10J20AHE3/5B requires strict adherence to the recommended pad dimensions to achieve its rated 1000 W PPPM performance.
SMB10J20AHE3/5B 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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 30.9A
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J20AHE3/5B FAQ
1.How can I place an order for SMB10J20AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J20AHE3/5B 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 SMB10J20AHE3/5B reliable?
The price and inventory of SMB10J20AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J20AHE3/5B is usually 5 days.
3.What payment methods are accepted for SMB10J20AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J20AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J20AHE3/5B?
SMB10J20AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J20AHE3/5B 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 SMB10J20AHE3/5B?
For technical support, including SMB10J20AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J20AHE3/5B requirements.
6.How does Aetrix verify that SMB10J20AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMB10J20AHE3/5B 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 SMB10J20AHE3/5B meets industry standards.
7.What is the process for return or replacement of SMB10J20AHE3/5B?
All SMB10J20AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J20AHE3/5B, 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 SMB10J20AHE3/5B part is unused and in its original packaging.
Return procedure for SMB10J20AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J20AHE3/5B Tags
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