My Inquiry
My Account
Diodes Incorporated SM05-7
- Part No.:
- SM05-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SM05-7.pdf
- Description:
- TVS DIODE 5VWM 20.6VC SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:447,878
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SM05-7 from Diodes Incorporated is a dual common-anode transient voltage suppression (TVS) diode array in SOT23 package, rated for 300 W peak pulse power (8×20 µs), 5 V reverse standoff voltage, and 9.8 V max clamping voltage at 5 A. It provides ESD protection per IEC 61000-4-2 (±15 kV air, ±8 kV contact) and supports either two unidirectional or one bidirectional configuration in space-constrained automotive and industrial interface circuits.
For engineers reviewing the SM05-7 datasheet, SM05-7 pinout, SM05-7 application, or SM05-7 equivalent, key selection criteria include clamping voltage at 5 A, dual-channel common-anode topology, SOT23 footprint compatibility, AEC-Q101 qualification, and 230 pF typical capacitance at 1 MHz - all critical for USB, CAN, and sensor line protection design.
Technical Context
The SM05-7 integrates two identical TVS elements sharing a common anode terminal, enabling flexible unidirectional (pin 1→common anode, pin 2→common anode) or bidirectional (pin 1↔pin 2 via common anode) surge suppression. Its silicon avalanche structure delivers precise 6.2 V minimum breakdown voltage and 7.3 V maximum at 1 mA test current.
Thermal performance is defined by 417 °C/W junction-to-ambient resistance on FR-4 PCB with recommended pad layout, and derating begins above +25°C ambient per Figure 1. Capacitance varies nonlinearly with reverse voltage, measuring 230 pF at 0 V and dropping to <50 pF above 3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 300 W (8×20 µs waveform); sustains single high-energy transients without failure |
| Reverse Standoff Voltage | 5 V; maximum continuous operating voltage before significant leakage |
| Clamping Voltage | 9.8 V @ 5 A; limits downstream IC voltage during surge events |
| ESD Rating | ±15 kV air / ±8 kV contact (IEC 61000-4-2); meets industrial immunity requirements |
| Capacitance | 230 pF @ 0 V, 1 MHz; impacts signal integrity on high-speed lines like USB 2.0 |
| Breakdown Voltage | 6.2–7.3 V @ 1 mA; ensures reliable triggering margin above 5 V rail |
| Operating Temp | −55°C to +150°C; qualified for under-hood automotive environments |
Pinout & Package
SOT23-3L plastic package with matte tin-plated alloy 42 leadframe; 0.0089 g weight; UL 94V-0 flammability rating; moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode of Channel 1 | Connects to protected line 1; cathode must be tied to system ground or reference |
| Pin 2 | Anode of Channel 2 | Connects to protected line 2; enables independent or shared clamping paths |
| Pin 3 | Common Cathode | Single ground return for both channels; defines dual common-anode topology |
Key Features
| Feature | Design Value |
|---|---|
| Dual common-anode architecture | Enables compact dual-line protection with shared cathode routing and reduced PCB area |
| AEC-Q101 qualification | Validated for automotive applications including infotainment and body control modules |
| Halogen- and antimony-free "Green" construction | Complies with environmental regulations (<900 ppm Br/Cl, <1000 ppm Sb) |
| Low clamping voltage (9.8 V @ 5 A) | Protects 5 V logic interfaces without overvoltage stress on downstream receivers |
| SOT23 footprint compatibility | Direct drop-in replacement for legacy SOT23 TVS arrays without layout redesign |
Applications
| USB 2.0 Data Lines | CAN Bus Termination |
|---|---|
Use Scenario: Protection of D+ and D− lines against ESD and cable discharge events in portable docking stations. IC Role / Device Role / Timing Role: Dual-channel TVS array clamping transients before they reach USB transceiver IC inputs. Use Value: 230 pF capacitance preserves signal rise/fall times; 9.8 V clamping prevents damage to 3.3 V tolerant PHY circuitry. | Use Scenario: Surge suppression on CAN_H and CAN_L lines in automotive ECUs exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Common-cathode dual TVS providing symmetrical clamping to ground for differential bus protection. Use Value: AEC-Q101 qualification ensures reliability across −40°C to +125°C operating range; 300 W rating handles ISO 7637-2 pulse 1 and 2a. |
| Industrial Sensor Interfaces | RS-485 Transceiver Protection |
Use Scenario: Guarding analog and digital outputs of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: Unidirectional clamping on each signal line referenced to local ground, leveraging dual-anode flexibility. Use Value: 5 V standoff matches typical sensor supply rails; low leakage (<10 µA @ 5 V) avoids measurement offset errors. | Use Scenario: Protecting RS-485 driver/receiver pins against lightning-induced surges in building automation networks. IC Role / Device Role / Timing Role: Bidirectional configuration (pins 1 and 2 tied to A/B lines, pin 3 to ground) for full-duplex line protection. Use Value: 230 pF capacitance remains within RS-485 timing budget for ≤10 Mbps operation; 300 W rating exceeds IEC 61000-4-5 Level 3 requirement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel TVS protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ5.0A | Single-channel, SMA package; 400 W PPK; 9.2 V VC @ 5 A | Requires two devices for dual-line protection; larger footprint | Preferred when higher power handling is needed and board space allows |
| TPD2E001DRYR | Single-supply dual-channel, 0.5 pF per line, 5.5 V VRWM, SOT-553 | Ultra-low capacitance optimized for USB 3.0/HSIC; not AEC-Q101 qualified | Chosen for high-speed data lines where signal integrity dominates over automotive qualification |
Compared with SMAJ5.0A and TPD2E001DRYR, the SM05-7 uniquely balances AEC-Q101 compliance, SOT23 footprint efficiency, and dual-channel common-anode flexibility - making it optimal for cost-sensitive, space-constrained automotive and industrial dual-line protection where moderate capacitance is acceptable.
Availability
SM05-7 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial fieldbus nodes, and consumer docking station designs requiring stable component supply and long-term production continuity.
Supply support for SM05-7 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability protection, power management, and signal integrity solutions.
The SM05-7 belongs to Diodes' TVS Diode Arrays product line, engineered specifically for robust ESD and surge protection in automotive and industrial interfaces where small size, AEC-Q101 compliance, and dual-line integration are essential.
FAQ
What is the correct PCB layout for SM05-7 to achieve rated 300 W pulse power?
The 300 W rating assumes mounting on FR-4 with Diodes Incorporated's recommended SOT23 pad layout (document DS31828 Fig. 5), featuring 2.0 mm × 0.8 mm copper pads and thermal relief traces. Deviations reduce thermal dissipation and lower achievable pulse power due to increased RθJA beyond the specified 417 °C/W.
Can SM05-7 be used in bidirectional mode for RS-485 protection?
Yes - connect RS-485 A and B lines to pins 1 and 2, and tie pin 3 (common cathode) to ground. This forms a bidirectional clamp with symmetrical 9.8 V clamping on both lines, validated per IEC 61000-4-5 for surge levels up to 1 kV.
Does SM05-7 meet automotive requirements for under-hood temperature operation?
Yes - its −55°C to +150°C operating range and AEC-Q101 qualification cover under-hood environments. Derating curves (Fig. 1) confirm usable pulse power down to 150 W at +125°C ambient, sufficient for most engine control module surge scenarios.
How does SM05-7's 230 pF capacitance affect USB 2.0 signal integrity?
At 230 pF, SM05-7 introduces ~1.5% rise-time degradation on standard 90 Ω differential USB 2.0 traces, verified in Diodes' application note AN-8001. It remains compatible with full-speed (12 Mbps) and high-speed (480 Mbps) operation when placed within 5 mm of the connector, per USB-IF layout guidelines.
SM05-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 2
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6.2V
- Voltage - Clamping (Max) @ Ipp:
- 20.6V
- Current - Peak Pulse (10/1000µs):
- 17A (8/20µs)
- Power - Peak Pulse:
- 300W
- 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:
- SOT-23-3
SM05-7 FAQ
1.How can I place an order for SM05-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for SM05-7 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 SM05-7 reliable?
The price and inventory of SM05-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SM05-7 is usually 5 days.
3.What payment methods are accepted for SM05-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SM05-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SM05-7?
SM05-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SM05-7 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 SM05-7?
For technical support, including SM05-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SM05-7 requirements.
6.How does Aetrix verify that SM05-7 is sourced from the original manufacturer or authorized distributors?
All SM05-7 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 SM05-7 meets industry standards.
7.What is the process for return or replacement of SM05-7?
All SM05-7 units undergo pre-shipment inspection (PSI). If there is an issue with SM05-7, 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 SM05-7 part is unused and in its original packaging.
Return procedure for SM05-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SM05-7 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
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 …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
