My Inquiry
My Account
Diodes Incorporated DESD3512SO-7
- Part No.:
- DESD3512SO-7
- Manufacturer:
- Diodes Incorporated
- Category:
- TVS Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
DESD3512SO-7.pdf
- Description:
- TVS DIODE 35V 12V 60V 30V SOT23
- Quantity:
- Payment:
- Shipping:
Inventory:2,762
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
DESD3512SO-7 from Diodes Incorporated is a dual-channel automotive-grade ESD protection diode designed for CAN bus data lines, featuring 36V/13.3V bidirectional breakdown voltages, ±30kV IEC 61000-4-2 ESD rating, 32pF typical channel capacitance, and 240W/330W peak pulse power dissipation per line-deployed in vehicle body control modules and infotainment gateways.
For engineers reviewing the DESD3512SO-7 datasheet, DESD3512SO-7 pinout, DESD3512SO-7 application, or DESD3512SO-7 equivalent, this device delivers verified CAN FD-compatible transient suppression with low clamping (53V/20V at 1A) and AEC-Q101 qualification for under-hood and chassis-mounted ECUs requiring robust signal integrity and ESD immunity.
Technical Context
This dual-line TVS array implements symmetrical bidirectional clamping between Pins 1/2 and Pin 3, enabling independent protection of CAN_H and CAN_L against fast transients while maintaining <32pF input capacitance to preserve signal rise time. Its 36V/13.3V VBR asymmetry matches standard CAN bus voltage margins: 36V protects against load dump-induced overvoltage on the dominant line, while 13.3V safeguards the recessive line against battery-supply coupling.
The SOT23-3 package supports high-density PCB layouts with thermal resistance RθJA = 417°C/W on FR-4 (2oz Cu), and its 500nA leakage at VRWM ensures minimal impact on CAN bias networks. Peak pulse current handling (4A/11A) aligns with ISO 7637-3 Pulse 2b and IEC 61000-4-5 surge requirements for automotive Class D interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (Pin1/2→3) | 36V min - Ensures reliable clamping above CAN bus 30V max operating voltage during load dump events |
| VBR (Pin3→1/2) | 13.3V min - Matches 12V supply rail margin to prevent false triggering during normal operation |
| CT | 32pF typ - Maintains >1Mbps CAN FD signal integrity by limiting capacitive loading on differential pair |
| VCL (1A, Pin1/2→3) | 53V max - Limits voltage overshoot to safe levels for CAN transceiver I/O pins during ESD strikes |
| VCL (11A, Pin3→1/2) | 30V max - Prevents latch-up in 12V-biased CAN receivers during high-energy surges |
| ESD Rating | ±30kV contact/air - Meets automotive OEM requirements for dashboard, door module, and sensor node ESD immunity |
| AEC-Q101 Qualified | Yes - Validated for temperature cycling (-65°C to +150°C), HTRB, and mechanical shock per automotive stress test plan |
Pinout & Package
Package: SOT23-3, surface-mount, lead-free, halogen-free, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | CAN_H Protection Anode | Connects to CAN_H line; clamps positive transients to Pin 3 (common cathode) |
| Pin 2 | CAN_L Protection Anode | Connects to CAN_L line; clamps positive transients to Pin 3 (common cathode) |
| Pin 3 | Common Cathode / Ground Reference | Shared low-impedance return path for both channels; must connect to clean chassis or signal ground |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel asymmetric clamping | 36V/13.3V breakdown enables independent protection of CAN_H (high-side) and CAN_L (low-side) without external biasing |
| Low 32pF junction capacitance | Preserves signal edge rate for CAN FD up to 5Mbps; avoids timing skew between differential lines |
| ±30kV IEC 61000-4-2 ESD immunity | Eliminates need for secondary ESD components in door modules, seat controllers, and mirror ECUs |
| 240W/330W peak power per channel | Withstands ISO 7637-3 Pulse 2b (50Ω/2Ω) and IEC 61000-4-5 Level 3 (2Ω/12Ω) surge waveforms |
| AEC-Q101 qualification & PPAP support | Validated for automotive production use with full traceability, lot-level reliability data, and change notification |
Applications
| Body Control Module (BCM) | Infotainment Gateway |
|---|---|
Use Scenario: Protects CAN interface between BCM microcontroller and door/window actuator nodes exposed to cable harness ESD. IC Role / Device Role / Timing Role: Dual-line transient voltage suppressor placed directly at connector entry point before CAN transceiver. Use Value: Prevents latch-up and permanent damage to NXP TJA1043 transceivers during assembly-line ESD events (IEC 61000-4-2 ±30kV). |
Use Scenario: Shields high-speed CAN FD link between head unit SoC and telematics modem in center console. IC Role / Device Role / Timing Role: Low-capacitance ESD clamp on differential pair, positioned adjacent to connector to minimize stub length. Use Value: Maintains signal integrity at 2Mbps+ data rates while meeting GM W31772 and Ford ES-XW7T-1A278-AC ESD requirements. |
| Chassis Domain Controller | Electric Power Steering (EPS) |
Use Scenario: Safeguards CAN communication between chassis controller and ABS/ESC modules subjected to engine bay thermal and electrical noise. IC Role / Device Role / Timing Role: AEC-Q101-qualified TVS array mounted on multi-layer PCB with dedicated ground plane beneath Pin 3. Use Value: Survives 1000+ thermal cycles (-40°C to +125°C) and passes load dump testing per ISO 16750-2 without parameter drift. |
Use Scenario: Protects torque-sensor CAN interface in EPS motor control unit exposed to high-current switching noise. IC Role / Device Role / Timing Role: Bidirectional clamping device placed between MAX33042E transceiver and 12V-biased sensor harness. Use Value: Clamps coupled transients to ≤30V (at 11A) to prevent false fault reporting and steering assist interruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar CAN bus ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NUP4202MR6T1G | Single-channel, 12V VBR, 20pF CT, 150W PPP - requires two devices for dual-line protection | Lacks integrated dual-channel architecture; higher board area and routing complexity for CAN_H/CAN_L | Select when lower capacitance (20pF) is prioritized over space savings and common-cathode layout simplicity |
| TPD2E001DRYR | 2-channel, 5V VBR, 12pF CT, ±8kV ESD - not AEC-Q101 qualified, no automotive surge rating | Designed for USB/I²C; insufficient breakdown voltage and surge capability for 12V CAN systems | Only suitable for non-automotive industrial CAN nodes where AEC-Q101 and ISO 7637 compliance are not required |
Compared with NUP4202MR6T1G and TPD2E001DRYR, DESD3512SO-7 uniquely combines AEC-Q101 qualification, asymmetric 36V/13.3V clamping, and integrated dual-channel SOT23-3 packaging-enabling single-component CAN bus protection with validated automotive reliability and minimal PCB footprint.
Availability
DESD3512SO-7 is available at Aetrix Electronics and suitable for automotive body electronics, chassis domain controllers, and electric power steering systems requiring stable component supply across extended product lifecycles.
Supply support for DESD3512SO-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 for automotive and industrial markets.
DESD3512SO-7 belongs to Diodes' AEC-Q101-qualified TVS diode portfolio, engineered specifically for CAN, LIN, and FlexRay bus protection in harsh automotive environments with emphasis on ESD robustness and thermal stability.
FAQ
What is the maximum clamping voltage for CAN_H-to-ground under 4A 8/20µs surge?
The DESD3512SO-7 clamps to 60V maximum (VCL1) when subjected to a 4A 8/20µs pulse between Pin 1 or Pin 2 and Pin 3. This value is measured per Figure 3 in DS38804 Rev. 1–2 and ensures compatibility with CAN transceivers rated for 70V absolute maximum bus voltage.
Can DESD3512SO-7 be used for LIN bus protection?
Yes-its 13.3V breakdown voltage and low 32pF capacitance make it suitable for LIN physical layer protection. However, LIN-specific devices like DESD1512SO offer tighter 15V VBR tolerance and lower leakage; DESD3512SO-7 remains valid where shared CAN/LIN board design simplifies BOM.
Is the SOT23-3 footprint compatible with automated optical inspection (AOI)?
Yes-the MN3 marking (visible on top surface) and standardized SOT23 dimensions (C=2.40mm, H=2.90mm) enable reliable AOI detection. Diodes' recommended pad layout (0.915mm width, 1.83mm length) provides ≥125µm solder mask web for consistent fiducial recognition and void-free reflow.
Does DESD3512SO-7 require external series resistors for CAN FD operation?
No-its 32pF typical capacitance introduces negligible impedance at 5Mbps CAN FD frequencies (Z ≈ 1kΩ at 5MHz), eliminating need for series termination. External resistors are only required if board-level stubs exceed 10mm or if EMI filtering is added downstream of the protection device.
DESD3512SO-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:
- -
- Bidirectional Channels:
- 2
- Voltage - Reverse Standoff (Typ):
- 35V (Max), 12V (Max)
- Voltage - Breakdown (Min):
- 36V, 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 60V, 30V
- Current - Peak Pulse (10/1000µs):
- 4A (8/20µs), 11A (8/20µs)
- Power - Peak Pulse:
- 300W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 32pF @ 1MHz
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
DESD3512SO-7 FAQ
1.How can I place an order for DESD3512SO-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for DESD3512SO-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 DESD3512SO-7 reliable?
The price and inventory of DESD3512SO-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DESD3512SO-7 is usually 5 days.
3.What payment methods are accepted for DESD3512SO-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DESD3512SO-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DESD3512SO-7?
DESD3512SO-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DESD3512SO-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 DESD3512SO-7?
For technical support, including DESD3512SO-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DESD3512SO-7 requirements.
6.How does Aetrix verify that DESD3512SO-7 is sourced from the original manufacturer or authorized distributors?
All DESD3512SO-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 DESD3512SO-7 meets industry standards.
7.What is the process for return or replacement of DESD3512SO-7?
All DESD3512SO-7 units undergo pre-shipment inspection (PSI). If there is an issue with DESD3512SO-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 DESD3512SO-7 part is unused and in its original packaging.
Return procedure for DESD3512SO-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
DESD3512SO-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…
