SMBJ28CA-Q Bourns TVS Diode (Bi-directional) (Diodes Moulded Non Polarised) In Stock
Bourns SMBJ28CA-Q is a bidirectional silicon transient voltage suppressor (TVS) diode in an SMB 2-pin package, with a 28 V working voltage, 32.75 V nominal breakdown voltage, and 45.4 V maximum clamping voltage. It protects sensitive circuits from ESD, lightning surges, and electrical fast transients in industrial and automotive-grade applications.
- Manufacturer
- Bourns
- Package
- Diodes Moulded Non Polarised
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- SMBJ28CA-Q Datasheet PDF
- Category
- TVS Diode (Bi-directional)
- Price
- From $0.1550(MOQ 1)
- Temp Range
- -55.0°C to 150.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SMBJ28CA-Q?
- Bidirectional TVS protecting AC and DC lines with 28 V standoff voltage
- Nominal breakdown voltage of 32.75 V (min 31.1 V, max 34.4 V) for precise clamping
- Maximum clamping voltage of 45.4 V to limit transient overvoltage on protected lines
- SMB (DO-214AA) 2-pin package for surface-mount PCB assembly
- Silicon construction with PRSM-MIN feature for reliable ESD and surge protection
What is SMBJ28CA-Q used for?
SMBJ28CA-Q is used to protect input/output lines in industrial control interfaces, automotive electronics, and telecommunications equipment against ESD, electrical fast transients, and surge events on 28 V nominal supply rails. Its bidirectional clamping capability makes it suitable for both AC signal lines and DC bus protection in power distribution boards, motor driver interfaces, and field-bus communication circuits.
What are the specifications of SMBJ28CA-Q?
| Factory Lead Time | 16Weeks |
| YTEOL | 7.16 |
| Additional Feature | PRSM-MIN |
| Breakdown Voltage-Max | 34.4V |
| Breakdown Voltage-Min | 31.1V |
| Breakdown Voltage-Nom | 32.75V |
| Clamping Voltage-Max | 45.4V |
| Configuration | SINGLE |
| Diode Element Material | SILICON |
| Diode Type | TRANS VOLTAGE SUPPRESSOR DIODE |
| JEDEC-95 Code | DO-214AA |
| JESD-30 Code | R-PDSO-C2 |
| JESD-609 Code | e3 |
| Non-rep Peak Rev Power Dis-Max | 600W |
| Number of Elements | 1 |
| Package Body Material | PLASTIC/EPOXY |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Polarity | BIDIRECTIONAL |
| Reference Standard | AEC-Q101; UL RECOGNIZED |
| Rep Pk Reverse Voltage-Max | 28V |
| Reverse Current-Max | 1 µA |
| Reverse Test Voltage | 28V |
| Surface Mount | YES |
| Technology | AVALANCHE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | C BEND |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Diodes Moulded Non Polarised |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8541.10.00.50 |
Where can I find the SMBJ28CA-Q datasheet?
SMBJ28CA-Q Datasheet DownloadOfficial datasheet from Bourns
What are equivalent replacements for SMBJ28CA-Q?
Compatible alternatives and drop-in replacements for SMBJ28CA-Q:
suggested
Frequently Asked Questions
What clamping voltage does SMBJ28CA-Q provide, and how does it protect a 28 V DC bus from transient surges?
SMBJ28CA-Q clamps transient overvoltage to a maximum of 45.4 V during surge events on a 28 V nominal DC rail, with a breakdown voltage range of 31.1 V to 34.4 V. This ensures that downstream components rated for voltages above 45.4 V remain protected from ESD pulses, lightning-induced surges, and electrical fast transients that can exceed 100 V on unprotected lines.
Why is the bidirectional (CA) configuration of SMBJ28CA-Q preferred for AC signal line protection?
The CA suffix designates a bidirectional TVS diode, meaning SMBJ28CA-Q can clamp transient voltages in both polarities. This makes it ideal for protecting AC signal lines, RS-485 bus interfaces, CAN bus lines, and other bidirectional communication circuits where voltage spikes can appear in either direction relative to ground.
What lead time and sourcing considerations apply to SMBJ28CA-Q for production BOM planning?
Bourns lists a 16-week factory lead time for SMBJ28CA-Q. Design engineers and procurement teams should account for this lead time when planning production schedules, particularly for industrial or automotive designs where this 28 V bidirectional TVS is a single-source component. Early purchase orders or buffer stock strategies are advisable for uninterrupted production.
How does the SMB (DO-214AA) package of SMBJ28CA-Q compare to smaller TVS packages in high-power surge applications?
The SMB package provides a larger body area than SOD-123 or SOD-323 alternatives, enabling SMBJ28CA-Q to dissipate higher peak pulse power during transient events. This is important for 28 V applications where surge currents from 8/20 µs or 10/1000 µs test pulses could exceed the power handling capability of miniaturized TVS packages, making SMB the preferred choice for robust protection.
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Why Buy from FindMyChip
About Bourns
Bourns is a leading electronic component manufacturer. FindMyChip sources Bourns ICs directly from authorized China distributors, offering competitive pricing and reliable stock.
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $0.8510 | $0.85 |
| 100+ | $0.3043 | $30.43 |
| 500+ | $0.2020 | $101.00 |
| 1000+ | $0.1890 | $189.00 |
| 3000+ | $0.1700 | $510.00 |
| 6000+ | $0.1550 | $930.00 |
In Stock · 24h Response · Worldwide Shipping
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