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Vishay General Semiconductor - Diodes Division SMB10J18HE3/5B
- Part No.:
- SMB10J18HE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J18HE3/5B.pdf
- Description:
- TVS DIODE 18VWM 32.2VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,065
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Product details
Overview
SMB10J18HE3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, designed for high-energy surge protection on DC power rails and signal lines. It features a 18 V stand-off voltage (VWM), 20.0–22.1 V breakdown voltage (VBR), 1000 W peak pulse power (10/1000 µs), 34.2 A peak pulse current (IPPM), and clamps transients to ≤29.2 V at rated surge. It is AEC-Q101 qualified and used in automotive power supply input stages.
For engineers reviewing the SMB10J18HE3/5B datasheet, SMB10J18HE3/5B pinout, SMB10J18HE3/5B application, or SMB10J18HE3/5B equivalent, key selection criteria include unidirectional polarity, 1000 W surge rating, 29.2 V clamping voltage at 34.2 A, AEC-Q101 qualification, and DO-214AA thermal performance with RθJA = 72 °C/W.
Technical Context
This TVS diode operates as a voltage-clamped crowbar device across protected nodes, triggering when reverse voltage exceeds its 20.0–22.1 V breakdown threshold. Its glass-passivated junction ensures stable VBR tolerance and low leakage (<1.0 µA at 18 V), while the low incremental surge resistance enables consistent clamping under repetitive 10/1000 µs surges.
Designed for surface-mount automated assembly, it meets MSL Level 1 (260 °C reflow peak) and JESD201 Class 2 whisker resistance. The cathode-band-marked DO-214AA package delivers 150 °C max junction temperature operation and supports 100 A non-repetitive forward surge current (IFSM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 18 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin. |
| VBR (min/max) | 20.0 / 22.1 V - Breakdown occurs within this range at 1.0 mA test current; ensures predictable turn-on timing. |
| VC @ IPPM | ≤29.2 V - Clamping voltage measured at 34.2 A peak pulse; determines maximum stress on downstream ICs. |
| PPPM | 1000 W - Peak pulse power handling (10/1000 µs waveform); defines single-event surge energy absorption capacity. |
| ID @ VWM | ≤1.0 µA - Reverse leakage at 18 V; negligible power loss and no false triggering in low-power systems. |
| TJ max. | 150 °C - Maximum junction temperature; enables use in under-hood automotive environments. |
| RθJA | 72 °C/W - Thermal resistance junction-to-ambient on standard 0.2" × 0.2" copper pads; guides PCB thermal layout. |
Pinout & Package
Package: DO-214AA (SMB), surface-mount, molded plastic case with matte tin-plated leads. Cathode identified by black band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / surge return path | Connected to lower-potential side (e.g., GND or return rail); completes clamping loop during overvoltage events. |
| Cathode | Reverse-biased terminal / surge sink | Connected to protected line (e.g., 12 V rail); conducts when transient exceeds VBR, shunting energy to ground. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD; suitable for engine control units and body electronics. |
| Glass passivated junction | Ensures tight VBR tolerance (±5%), stable leakage over life, and immunity to humidity-induced parameter drift. |
| Low profile DO-214AA package | 0.220" × 0.130" footprint with 0.086" height; fits space-constrained layouts while maintaining 1000 W surge capability. |
| MSL Level 1 compliance | Rated for 260 °C peak reflow profile without popcorn cracking; eliminates pre-bake requirements in SMT lines. |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal stress; critical for long-life automotive and industrial deployments. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and LDO input to clamp transients before regulation. Use Value: Limits voltage seen by downstream regulators to ≤29.2 V during 1000 W surges, preventing latch-up or burnout. |
Use Scenario: Analog sensor outputs (e.g., pressure, temperature) routed through harnesses susceptible to ESD and inductive coupling. IC Role / Device Role / Timing Role: Low-leakage TVS on signal line to ground, preserving small-signal integrity while suppressing ±8 kV contact ESD. Use Value: Sub-1 µA leakage at 18 V avoids DC offset errors; 29.2 V clamping protects 3.3 V ADC front-ends. |
| DC-DC Converter Input Stage | Telecom Power Interface |
Use Scenario: 24 V input to isolated flyback converter in factory automation equipment. IC Role / Device Role / Timing Role: Primary-side TVS across input capacitor to absorb switching noise and lightning-induced surges. Use Value: 1000 W rating handles repeated 10/1000 µs transients per IEC 61000-4-5; DO-214AA thermal mass sustains duty cycles. |
Use Scenario: -48 V telecom power feed entering remote radio head enclosures. IC Role / Device Role / Timing Role: Unidirectional TVS referenced to system ground to protect upstream DC-DC and monitoring ICs. Use Value: 150 °C TJ max enables operation in sealed outdoor cabinets; AEC-Q101 grade assures field longevity beyond 10 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ18A-E3/5B | Same DO-214AA package, identical VWM/VBR/VC specs, but commercial-grade (non-AEC-Q101). | Lacks automotive qualification; unsuitable for under-hood or safety-critical modules. | Select when cost sensitivity outweighs automotive reliability requirements and environmental stress testing is not mandated. |
| 1.5SMC18A | Higher 1500 W PPPM rating, same VWM/VBR, but larger DO-214AB (SMC) package (0.305" × 0.235"). | Requires PCB redesign due to larger footprint and higher thermal mass; better for infrequent high-energy events. | Choose only if 1000 W is insufficient and board space allows SMC footprint; verify RθJA impact on thermal derating. |
Compared with SMBJ18A-E3/5B, SMB10J18HE3/5B adds AEC-Q101 validation for automotive deployment; compared with 1.5SMC18A, it trades 500 W surge headroom for 35% smaller PCB area and tighter thermal response in constrained layouts.
Availability
SMB10J18HE3/5B is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor interface hardening, and telecom DC feed protection requiring stable component supply across multi-year production cycles.
Supply support for SMB10J18HE3/5B 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific optimization.
The SMB10J series belongs to Vishay's TRANSZORB® TVS platform, engineered specifically for high-power-density, AEC-Q101-compliant transient suppression in harsh automotive and industrial environments.
FAQ
What is the clamping voltage of SMB10J18HE3/5B at its rated peak pulse current?
The SMB10J18HE3/5B clamps to a maximum of 29.2 V when subjected to its rated 34.2 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured at TA = 25 °C with specified PCB pad layout and defines the upper voltage limit imposed on protected circuitry during surge events. The SMB10J18HE3/5B maintains this clamping performance across its full operating temperature range.
Is SMB10J18HE3/5B suitable for bidirectional signal line protection?
No - SMB10J18HE3/5B is a unidirectional TVS diode, indicated by its "J" (not "JCA") suffix and cathode band marking. It conducts only during reverse overvoltage conditions and blocks forward current above ~3.5 V. For bidirectional protection (e.g., RS-485, USB), a symmetric device like SMB8J18CA must be used. Using SMB10J18HE3/5B on AC-coupled or bipolar signal lines risks forward conduction and malfunction.
Does SMB10J18HE3/5B meet RoHS and halogen-free requirements?
Yes - SMB10J18HE3/5B carries the "HE3" suffix, confirming RoHS compliance per EU Directive 2011/65/EU and halogen-free status per JEDEC JS709A. The matte tin plating satisfies J-STD-002 solderability and JESD22-B102 lead finish standards. No brominated flame retardants are used in the DO-214AA molding compound, which meets UL 94 V-0.
What is the maximum operating temperature for SMB10J18HE3/5B?
The SMB10J18HE3/5B has a maximum junction temperature (TJ) of 150 °C and an operating junction/storage temperature range of –55 °C to +150 °C. This rating enables deployment in under-hood automotive locations and sealed industrial enclosures. Derating of peak pulse power begins above TA = 25 °C per Figure 2 in the Vishay datasheet 88422, with 1000 W fully supported only at ambient ≤25 °C on recommended copper pads.
How does the "HE3/5B" suffix in SMB10J18HE3/5B affect packaging and qualification?
The "HE3" denotes RoHS-compliant construction with AEC-Q101 qualification and JESD201 Class 2 whisker resistance; "5B" specifies 13-inch tape-and-reel packaging containing 3200 units. This contrasts with "E3/5B" (commercial grade, no AEC-Q101) and "HE3/52" (same qualification, but 7-inch reel with 750 units). The HE3 grade is mandatory for automotive Tier 1 BOMs requiring PPAP documentation.
SMB10J18HE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 18V
- Voltage - Breakdown (Min):
- 20V
- Voltage - Clamping (Max) @ Ipp:
- 32.2V
- Current - Peak Pulse (10/1000µs):
- 31.1A
- 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)
SMB10J18HE3/5B FAQ
1.How can I place an order for SMB10J18HE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J18HE3/5B 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 SMB10J18HE3/5B reliable?
The price and inventory of SMB10J18HE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J18HE3/5B is usually 5 days.
3.What payment methods are accepted for SMB10J18HE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J18HE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J18HE3/5B?
SMB10J18HE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J18HE3/5B 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 SMB10J18HE3/5B?
For technical support, including SMB10J18HE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J18HE3/5B requirements.
6.How does Aetrix verify that SMB10J18HE3/5B is sourced from the original manufacturer or authorized distributors?
All SMB10J18HE3/5B 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 SMB10J18HE3/5B meets industry standards.
7.What is the process for return or replacement of SMB10J18HE3/5B?
All SMB10J18HE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J18HE3/5B, 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 SMB10J18HE3/5B part is unused and in its original packaging.
Return procedure for SMB10J18HE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J18HE3/5B Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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