My Inquiry
My Account
Vishay General Semiconductor - Diodes Division SMBJ15A-E3/5B
;;2.jpg)
- Part No.:
- SMBJ15A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15A-E3/5B.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,274
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMBJ15A-E3/5B from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection of DC power rails and signal lines. It features a 15 V standoff voltage (VWM), 16.7–18.5 V breakdown range at 1 mA, 24.4 V clamping voltage at 24.6 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed in industrial motor drives to safeguard gate drivers against inductive switching transients.
For engineers reviewing the SMBJ15A-E3/5B datasheet, SMBJ15A-E3/5B pinout, SMBJ15A-E3/5B application, or SMBJ15A-E3/5B equivalent, this page delivers verified package mapping (SMB/DO-214AA), polarity identification (cathode band), clamping performance under standardized surge conditions, and AEC-Q101-comparable alternatives for automotive-grade designs.
Technical Context
This TVS operates as a unidirectional avalanche clamp: reverse-biased during normal operation with ≤1.0 µA leakage at 15 V, then rapidly avalanches when transient voltage exceeds its 16.7–18.5 V VBR threshold to limit downstream voltage to ≤24.4 V at 24.6 A. Its low incremental surge resistance ensures minimal voltage overshoot during fast transients.
Thermally, it sustains 150 °C maximum junction temperature with 100 °C/W junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads. The glass-passivated junction and matte tin-plated leads meet J-STD-002 solderability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse operating voltage before conduction begins; sets upper limit for protected circuit's steady-state rail. |
| VBR (min/max) | 16.7 V / 18.5 V at 1 mA - Confirmed breakdown range defining turn-on threshold; ensures reliable triggering above system noise margin. |
| VC @ IPPM | 24.4 V at 24.6 A - Clamped voltage during 600 W 10/1000 µs surge; directly limits stress on downstream MOSFETs or ICs. |
| PPPM | 600 W - Peak pulse power handling per single transient; validated per ANSI/IEEE C62.35 standards. |
| IPPM | 24.6 A - Maximum non-repetitive surge current supported at rated clamping voltage; defines minimum PCB trace width and layout robustness. |
| TJ max. | 150 °C - Maximum junction temperature; enables operation in under-hood or enclosed industrial enclosures without derating below 50 °C ambient. |
| Package | SMB (DO-214AA) - Surface-mount outline with 0.205" × 0.130" footprint; compatible with automated pick-and-place and reflow profiles up to 260 °C peak. |
Pinout & Package
Package: SMB (DO-214AA), molded case with matte tin-plated leads; cathode identified by a visible band on the body end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes conduction path during transient clamp event. |
| Cathode | High-side connection point | Connected to protected line (e.g., 15 V rail); polarity band marks this terminal for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables protection against high-energy transients from relay coil decay or ESD events without thermal runaway. |
| 24.4 V clamping voltage at 24.6 A | Guarantees downstream 24 V logic or gate drivers remain within absolute maximum ratings during surge events. |
| ≤1.0 µA reverse leakage at 15 V | Minimizes standby power loss in battery-powered systems and avoids false triggering in high-impedance sensor interfaces. |
| MSL Level 1 (260 °C peak) | Supports standard lead-free reflow without moisture-induced popcorning; eliminates pre-bake requirement. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental compliance mandates without halogen restrictions; suitable for consumer and industrial end equipment. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of N-channel MOSFET gate drivers against voltage spikes induced by inductive load switching in BLDC motor inverters. IC Role / Device Role / Timing Role: Unidirectional TVS placed between gate driver output and MOSFET gate to clamp negative-going transients and prevent gate oxide rupture. Use Value: Limits gate-source voltage to ≤24.4 V during 24.6 A surges, preserving MOSFET reliability across 100,000+ switching cycles. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/O pins from load dump and jump-start transients in door module ECUs. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply rail upstream of LDO regulators to absorb energy before regulation stage. Use Value: Withstands 600 W pulses without degradation, enabling compliance with ISO 7637-2 Pulse 1 and Pulse 2b test profiles. |
| Telecom Power Supplies | Industrial PLC I/O Modules |
Use Scenario: Input-stage protection for 48 V DC-DC converters in base station power distribution units exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on secondary-side 48 V output rail, coordinated with upstream MOVs and fuses. Use Value: 24.4 V clamping ensures downstream PoE controllers and Ethernet PHYs remain within safe operating area during 10/1000 µs transients. |
Use Scenario: Signal line protection for analog input channels (e.g., 4–20 mA loops) in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Low-leakage (≤1.0 µA) TVS placed across differential inputs to suppress EFT bursts while preserving measurement accuracy. Use Value: Maintains <1 µA leakage at 15 V standoff, preventing offset errors in precision 24-bit ADC front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA-E3/5B | Bidirectional variant with same VWM (15 V), VBR (16.7–18.5 V), and VC (24.4 V); symmetrical clamping in both polarities. | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, CAN FD); not suitable for DC rail protection where polarity matters. | Select SMBJ15CA-E3/5B only when protecting bidirectional data buses or floating references needing equal positive/negative clamping. |
| SMAJ15A-E3/52 | Same electrical specs but in smaller SMA (DO-214AC) package; 33% lower PPPM (400 W vs. 600 W) due to reduced thermal mass. | Limited to lower-energy transients (e.g., ESD-only); insufficient for inductive switching or lightning surge scenarios requiring full 600 W rating. | Choose SMAJ15A-E3/52 only for space-constrained consumer electronics with verified <400 W threat levels and no inductive loads. |
Compared with SMBJ15A-E3/5B, SMBJ15CA-E3/5B adds bidirectional symmetry at no clamping penalty but sacrifices unidirectional optimization for DC rails, while SMAJ15A-E3/52 trades 33% pulse power headroom for footprint reduction - making SMBJ15A-E3/5B the optimal choice for industrial 600 W surge immunity where board area permits SMB packaging.
Availability
SMBJ15A-E3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supplies, and PLC I/O modules requiring stable component supply and long-term production continuity.
Supply support for SMBJ15A-E3/5B 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, and protection devices with emphasis on reliability, power handling, and automotive qualification.
The SMBJ series was engineered for high-energy transient suppression in harsh environments - targeting industrial automation, transportation, and infrastructure systems where failure tolerance and surge resilience are critical.
FAQ
What is the maximum clamping voltage of SMBJ15A-E3/5B under a 10/1000 µs surge?
The SMBJ15A-E3/5B clamps to a maximum of 24.4 V when subjected to its rated peak pulse current of 24.6 A using the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's datasheet Document Number 88392, ensuring predictable overvoltage limiting for downstream components in the protected circuit.
Does SMBJ15A-E3/5B meet automotive qualification standards?
The SMBJ15A-E3/5B itself is RoHS-compliant commercial-grade (E3 suffix) and not AEC-Q101 qualified; however, Vishay offers the functionally identical SMBJ15AHE3_B variant with AEC-Q101 qualification. For automotive applications requiring formal qualification, SMBJ15AHE3_B - not SMBJ15A-E3/5B - must be specified and sourced.
How is polarity identified on SMBJ15A-E3/5B?
SMBJ15A-E3/5B uses a visible cathode band on the body to indicate polarity: the banded end is the cathode and must be connected to the protected line (e.g., +15 V rail), while the unbanded end is the anode and connects to ground or return. This marking is consistent across all unidirectional SMBJ variants and aligns with DO-214AA industry conventions.
What is the thermal resistance of SMBJ15A-E3/5B, and how does it affect layout?
The SMBJ15A-E3/5B 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. To maintain safe junction temperatures under repetitive surges, PCB layout must provide at least this pad area - undersized pads increase thermal impedance and risk exceeding the 150 °C TJ max rating.
Can SMBJ15A-E3/5B replace SMAJ15A-E3/52 in an existing design?
No direct replacement is recommended: although both share 15 V VWM and similar VBR, SMBJ15A-E3/5B delivers 600 W peak pulse power versus SMAJ15A-E3/52's 400 W, and uses the larger SMB (DO-214AA) package versus SMA (DO-214AC). Swapping requires PCB footprint revision and validation of surge energy margins - SMBJ15A-E3/5B should only be used where its higher power rating and thermal capability are explicitly needed.
SMBJ15A-E3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 24.6A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ15A-E3/5B FAQ
1.How can I place an order for SMBJ15A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15A-E3/5B 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 SMBJ15A-E3/5B reliable?
The price and inventory of SMBJ15A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ15A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ15A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15A-E3/5B?
SMBJ15A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15A-E3/5B 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 SMBJ15A-E3/5B?
For technical support, including SMBJ15A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15A-E3/5B requirements.
6.How does Aetrix verify that SMBJ15A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ15A-E3/5B 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 SMBJ15A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ15A-E3/5B?
All SMBJ15A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15A-E3/5B, 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 SMBJ15A-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ15A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15A-E3/5B Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
