# GLECS HV Board

## Description

Power\-section schematic for a 12V DC input generating \+4V for a 4G module, \+5V, and \+3V3 rails with input TVS protection and regulator thermal notes\.

## Project Details

- **Owner:** ddsdasxdas
- **Created:** 7/11/2026
- **Last Updated:** 7/26/2026
- **Visibility:** Public
- **Forks:** 1
- **Copies:** 1

## Key Components

### D\_CLAMP\_CS — [BAT54S RFG](https://flux.ai/lcsc/bat54s-rfg~e64d.md)

- LCSC Part Number: C486014
- Package or Case Code: SOT\-23\-3\_L2\.9\-W1\.3\-P1\.90\-LS2\.4\-BR
- Datasheet URL: https://assets\.lcsc\.com/datasheet/szlcsc/Download\-ISO9001\-Certification\.pdf
- Role: Clamp
- Role Details: I\_SENSE ADC clamp diode to rails
- Manufacturer Part Number: BAT54S RFG
- Product Info Url: https://lcsc\.com/product\-detail/New\-Arrivals\_Taiwan\-Semiconductor\-Taiwan\-Semicon\-BAT54S\-RFG\_C486014\.html
- Part Type: Schottky Barrier Diodes \(SBD\)
- JLCPCB Part Class: Extended Part
- Manufacturer Name: Taiwan Semiconductor\(台湾半导体\)

**Pins:**
- 1 [pin 1]
- 2 [pin 2]
- 3 [pin 3]

### D\_CLAMP\_VS — [BAT54S RFG](https://flux.ai/lcsc/bat54s-rfg~e64d.md)

- LCSC Part Number: C486014
- Role: Clamp
- Package or Case Code: SOT\-23\-3\_L2\.9\-W1\.3\-P1\.90\-LS2\.4\-BR
- Datasheet URL: https://assets\.lcsc\.com/datasheet/szlcsc/Download\-ISO9001\-Certification\.pdf
- Role Details: V\_SENSE ADC clamp diode to GND and \+3V3 on the HV board
- Manufacturer Part Number: BAT54S RFG
- Product Info Url: https://lcsc\.com/product\-detail/New\-Arrivals\_Taiwan\-Semiconductor\-Taiwan\-Semicon\-BAT54S\-RFG\_C486014\.html
- Part Type: Schottky Barrier Diodes \(SBD\)
- JLCPCB Part Class: Extended Part
- Manufacturer Name: Taiwan Semiconductor\(台湾半导体\)

**Pins:**
- 1 [pin 1]
- 2 [pin 2]
- 3 [pin 3]

### J\_DELTA — [DB127V\-5\.08\-2P\-GN\-S](https://flux.ai/cherepanyadima/db127v-5p08-2p-gn-s~ic.md)

- Manufacturer Part Number: DB127V\-5\.08\-2P\-GN\-S
- Part Type: Connector
- Role: Relay Output Terminal
- Datasheet URL: https://www\.lcsc\.com/datasheet/C3018698\.pdf?spm=wm\.sxq\.inf\.ggs&lcsc\_vid=ElhbUlFSRlUNBF0CQlQIBQBUFFILBFEAQVVWUgZWE1gxVlNRQVVdVFRSQ1daVDsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D
- Role Details: Delta contactor coil terminals switched by K3 contacts
- Manufacturer Name: DORABO

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### J\_LINK — [B12B\-XH\-A\(LF\)\(SN\)](https://flux.ai/lcsc/b12b-xh-alfsn~jih5.md)

- Connector Positions: 12
- Package or Case Code: CONN\-TH\_B12B\-XH\-A\-LF\-SN
- Role Details: Carries power, relay controls, and sensor outputs between HV board and logic board
- LCSC Part Number: C158027
- JLCPCB Part Class: Extended Part
- Connector Pitch: 2\.5mm
- Connector Rows: 1
- Part Type: Wire To Board / Wire To Wire Connector
- Manufacturer Name: JST
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/2304140030\_JST\-B12B\-XH\-A\-LF\-SN\_C158027\.pdf
- Manufacturer Part Number: B12B\-XH\-A\(LF\)\(SN\)
- Connector Type: JST\-XH
- Role: Board\-to\-board connector
- Product Info Url: https://lcsc\.com/product\-detail/XH\-Connectors\_JST\_B12B\-XH\-A\-LF\-SN\_XHsocket\-1\-12P\-pitch2\-5mm\_C158027\.html

**Pins:**
- 1 [pin 1]
- 10 [pin 10]
- 11 [pin 11]
- 12 [pin 12]
- 2 [pin 2]
- 3 [pin 3]
- 4 [pin 4]
- 5 [pin 5]
- 6 [pin 6]
- 7 [pin 7]
- 8 [pin 8]
- 9 [pin 9]

### J\_MAIN — [DB127V\-5\.08\-2P\-GN\-S](https://flux.ai/cherepanyadima/db127v-5p08-2p-gn-s~ic.md)

- Manufacturer Part Number: DB127V\-5\.08\-2P\-GN\-S
- Role Details: Main contactor coil terminals switched by K1 contacts
- Role: Relay Output Terminal
- Part Type: Connector
- Datasheet URL: https://www\.lcsc\.com/datasheet/C3018698\.pdf?spm=wm\.sxq\.inf\.ggs&lcsc\_vid=ElhbUlFSRlUNBF0CQlQIBQBUFFILBFEAQVVWUgZWE1gxVlNRQVVdVFRSQ1daVDsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D
- Manufacturer Name: DORABO

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### J\_NEUTRAL — [DB127V\-5\.08\-2P\-GN\-S](https://flux.ai/cherepanyadima/db127v-5p08-2p-gn-s~ic.md)

- Role Details: Common neutral return for 230VAC contactor coils
- Manufacturer Part Number: DB127V\-5\.08\-2P\-GN\-S
- Role: Neutral Terminal
- Part Type: Connector
- Datasheet URL: https://www\.lcsc\.com/datasheet/C3018698\.pdf?spm=wm\.sxq\.inf\.ggs&lcsc\_vid=ElhbUlFSRlUNBF0CQlQIBQBUFFILBFEAQVVWUgZWE1gxVlNRQVVdVFRSQ1daVDsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D
- Manufacturer Name: DORABO

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### J\_PWR — [DB127V\-5\.08\-2P\-GN\-S](https://flux.ai/cherepanyadima/db127v-5p08-2p-gn-s~ic.md)

- Role: Power Input Connector
- Manufacturer Part Number: DB127V\-5\.08\-2P\-GN\-S
- Part Type: Connector
- Role Details: External 12V DC input screw terminal; pin 1 \+12V, pin 2 GND
- Datasheet URL: https://www\.lcsc\.com/datasheet/C3018698\.pdf?spm=wm\.sxq\.inf\.ggs&lcsc\_vid=ElhbUlFSRlUNBF0CQlQIBQBUFFILBFEAQVVWUgZWE1gxVlNRQVVdVFRSQ1daVDsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D
- Manufacturer Name: DORABO

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### J\_S1 — [DB127V\-5\.08\-2P\-GN\-S](https://flux.ai/cherepanyadima/db127v-5p08-2p-gn-s~ic.md)

- Manufacturer Part Number: DB127V\-5\.08\-2P\-GN\-S
- Part Type: Connector
- Role: Connector
- Role Details: Field float switch contact input feeding U\_OPTO1 LED through R\_OPTO1
- Datasheet URL: https://www\.lcsc\.com/datasheet/C3018698\.pdf?spm=wm\.sxq\.inf\.ggs&lcsc\_vid=ElhbUlFSRlUNBF0CQlQIBQBUFFILBFEAQVVWUgZWE1gxVlNRQVVdVFRSQ1daVDsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D
- Manufacturer Name: DORABO

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### J\_S2 — [DB127V\-5\.08\-2P\-GN\-S](https://flux.ai/cherepanyadima/db127v-5p08-2p-gn-s~ic.md)

- Role Details: Field overload relay contact input feeding U\_OPTO2 LED through R\_OPTO2
- Manufacturer Part Number: DB127V\-5\.08\-2P\-GN\-S
- Part Type: Connector
- Datasheet URL: https://www\.lcsc\.com/datasheet/C3018698\.pdf?spm=wm\.sxq\.inf\.ggs&lcsc\_vid=ElhbUlFSRlUNBF0CQlQIBQBUFFILBFEAQVVWUgZWE1gxVlNRQVVdVFRSQ1daVDsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D
- Manufacturer Name: DORABO
- Role: Connector

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### J\_STAR — [DB127V\-5\.08\-2P\-GN\-S](https://flux.ai/cherepanyadima/db127v-5p08-2p-gn-s~ic.md)

- Manufacturer Part Number: DB127V\-5\.08\-2P\-GN\-S
- Part Type: Connector
- Role: Relay Output Terminal
- Datasheet URL: https://www\.lcsc\.com/datasheet/C3018698\.pdf?spm=wm\.sxq\.inf\.ggs&lcsc\_vid=ElhbUlFSRlUNBF0CQlQIBQBUFFILBFEAQVVWUgZWE1gxVlNRQVVdVFRSQ1daVDsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D
- Role Details: Star contactor coil terminals switched by K2 contacts
- Manufacturer Name: DORABO

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### J\_VS\_IN — [DB127V\-5\.08\-2P\-GN\-S](https://flux.ai/cherepanyadima/db127v-5p08-2p-gn-s~ic.md)

- Manufacturer Part Number: DB127V\-5\.08\-2P\-GN\-S
- Role: Connector
- Part Type: Connector
- Datasheet URL: https://www\.lcsc\.com/datasheet/C3018698\.pdf?spm=wm\.sxq\.inf\.ggs&lcsc\_vid=ElhbUlFSRlUNBF0CQlQIBQBUFFILBFEAQVVWUgZWE1gxVlNRQVVdVFRSQ1daVDsOAxUeFF5JWBYZEEoBGA4JCwFIFA4DSA%3D%3D
- Role Details: 230VAC voltage sense input to ZMPT101B primary through R\_BURDEN
- Manufacturer Name: DORABO

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### K1 — [G2RL\-1A\-E DC12](https://flux.ai/lcsc/g2rl-1a-e-dc12~9l7d.md)

- Role: Switching
- Role Details: Main contactor relay; Omron G2RL\-1A\-E DC12 SPST\-NO, 440VAC\-rated family
- Package or Case Code: RELAY\-TH\_OMRON\_G2RL\-1A\-E\-HA\-DCXX
- LCSC Part Number: C1564126
- Part Type: Power Relays
- JLCPCB Part Class: Extended Part
- Manufacturer Name: OMRON\(欧姆龙\)
- Manufacturer Part Number: G2RL\-1A\-E DC12

**Pins:**
- 1 [pin 1]
- 3 [pin 3]
- 4 [pin 4]
- 5 [pin 5]
- 6 [pin 6]
- 8 [pin 8]

### K2 — [G2RL\-1A\-E DC12](https://flux.ai/lcsc/g2rl-1a-e-dc12~9l7d.md)

- Role: Switching
- Package or Case Code: RELAY\-TH\_OMRON\_G2RL\-1A\-E\-HA\-DCXX
- LCSC Part Number: C1564126
- Role Details: Star contactor relay; Omron G2RL\-1A\-E DC12 SPST\-NO, 440VAC\-rated family
- Part Type: Power Relays
- JLCPCB Part Class: Extended Part
- Manufacturer Name: OMRON\(欧姆龙\)
- Manufacturer Part Number: G2RL\-1A\-E DC12

**Pins:**
- 1 [pin 1]
- 3 [pin 3]
- 4 [pin 4]
- 5 [pin 5]
- 6 [pin 6]
- 8 [pin 8]

### K3 — [G2RL\-1A\-E DC12](https://flux.ai/lcsc/g2rl-1a-e-dc12~9l7d.md)

- Role Details: Delta contactor relay; Omron G2RL\-1A\-E DC12 SPST\-NO, 440VAC\-rated family
- Package or Case Code: RELAY\-TH\_OMRON\_G2RL\-1A\-E\-HA\-DCXX
- Role: Switching
- LCSC Part Number: C1564126
- Part Type: Power Relays
- JLCPCB Part Class: Extended Part
- Manufacturer Name: OMRON\(欧姆龙\)
- Manufacturer Part Number: G2RL\-1A\-E DC12

**Pins:**
- 1 [pin 1]
- 3 [pin 3]
- 4 [pin 4]
- 5 [pin 5]
- 6 [pin 6]
- 8 [pin 8]

### MOV1 — [B72210S0271K101](https://flux.ai/cherepanyadima/b72210s0271k101~3w.md)

- Manufacturer Part Number: V470LA10P
- License: https://creativecommons\.org/licenses/by/4\.0/
- Datasheet URL: https://www\.tdk\-electronics\.tdk\.com/inf/70/db/var/SIOV\_Leaded\_StandarD\.pdf
- Role Details: 470VAC radial MOV across relay contactor\-coil switching contacts; selected above 415VAC contactor coil line voltage\.
- Manufacturer Name: Littelfuse
- Voltage Rating: 470VAC
- Role: Protection
- Package or Case Code: MOV radial 10mm
- Part Type: Varistor

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### MOV2 — [B72210S0271K101](https://flux.ai/cherepanyadima/b72210s0271k101~3w.md)

- Manufacturer Part Number: V470LA10P
- Voltage Rating: 470VAC
- License: https://creativecommons\.org/licenses/by/4\.0/
- Datasheet URL: https://www\.tdk\-electronics\.tdk\.com/inf/70/db/var/SIOV\_Leaded\_StandarD\.pdf
- Manufacturer Name: Littelfuse
- Package or Case Code: MOV radial 10mm
- Role Details: 470VAC radial MOV across relay contactor\-coil switching contacts; selected above 415VAC contactor coil line voltage\.
- Role: Protection
- Part Type: Varistor

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### MOV3 — [B72210S0271K101](https://flux.ai/cherepanyadima/b72210s0271k101~3w.md)

- Manufacturer Part Number: V470LA10P
- License: https://creativecommons\.org/licenses/by/4\.0/
- Datasheet URL: https://www\.tdk\-electronics\.tdk\.com/inf/70/db/var/SIOV\_Leaded\_StandarD\.pdf
- Manufacturer Name: Littelfuse
- Voltage Rating: 470VAC
- Package or Case Code: MOV radial 10mm
- Role: Protection
- Role Details: 470VAC radial MOV across relay contactor\-coil switching contacts; selected above 415VAC contactor coil line voltage\.
- Part Type: Varistor

**Pins:**
- 1 [pin 1]
- 2 [pin 2]

### T\_CS — [ZMCT\-103C](https://flux.ai/adrian95/zmct-103c~gfl.md)

- Role Details: Current transformer secondary for I\_SENSE measurement
- Manufacturer Name: ZHE MING LANG XI
- Role: Current Transformer
- Datasheet URL: https://5nrorwxhmqqijik\.leadongcdn\.com/ZMCT103C\+specification\-aidirBqoKomRilSjpimnokp\.pdf
- License: https://creativecommons\.org/licenses/by/4\.0/
- Manufacturer Part Number: ZMCT\-103C
- Part Type: Transformer

**Pins:**
- P1 [pin 1]
- P2 [pin 2]

### T1 — [ZMPT101B](https://flux.ai/lcsc/zmpt101b~65gv.md)

- Part Type: Current Transformers
- Manufacturer Part Number: ZMPT101B
- Package or Case Code: XFMR\-TH\_ZMPT101B
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/user\-uploaded/6e11ac51dd4c224b010e68e859db5deabf5b321a76ab26c439e0872369a57706\.pdf
- Role: Voltage Sensor
- JLCPCB Part Class: Extended Part
- LCSC Part Number: C111858
- License: https://creativecommons\.org/licenses/by/4\.0/
- Role Details: ZMPT101B transformer\-isolated 230VAC voltage sensing input
- Manufacturer Name: 择明朗熙

**Pins:**
- 1 [pin 1]
- 2 [pin 2]
- 3 [pin 3]
- 4 [pin 4]

### U\_DRV — [ULN2003A](https://flux.ai/jecstronic/uln2003a~v8w.md)

- Datasheet URL: https://www\.st\.com/content/ccc/resource/technical/document/datasheet/f3/6e/c8/64/4d/b3/4e/38/CD00001244\.pdf/files/CD00001244\.pdf/jcr:content/translations/en\.CD00001244\.pdf
- Part Type: Transistor Array
- Role Details: Drives K1/K2/K3 coils from RELAY\_MAIN/STAR/DELTA via ULN2003A channels 1\-3; COM tied to \+12V for flyback diodes
- License: https://creativecommons\.org/licenses/by/4\.0/
- Role: Relay Driver
- Manufacturer Name: STMicroelectronics
- Manufacturer Part Number: ULN2003A

**Pins:**
- COM [pin 9]
- GND [pin 8]
- I1 [pin 1]
- I2 [pin 2]
- I3 [pin 3]
- I4 [pin 4]
- I5 [pin 5]
- I6 [pin 6]
- I7 [pin 7]
- O1 [pin 16]
- O2 [pin 15]
- O3 [pin 14]
- O4 [pin 13]
- O5 [pin 12]
- O6 [pin 11]
- O7 [pin 10]

### U\_OPTO1 — [PC817C](https://flux.ai/lcsc/pc817c~nbmh.md)

- Product Info Url: https://lcsc\.com/product\-detail/DIP\-Optocouplers\_PC817C\_C115500\.html
- Role Details: PC817C optocoupler for isolated FLOAT\_IN input
- LCSC Part Number: C115500
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/1809251512\_Wuxi\-China\-Resources\-Huajing\-Microelectronics\-PC817C\_C115500\.pdf
- Role: Isolation
- Manufacturer Part Number: PC817C
- Package or Case Code: DIP\-4\_L4\.6\-W6\.5\-P2\.54\-LS7\.6\-BL
- JLCPCB Part Class: Extended Part
- Manufacturer Name: 华润华晶
- Part Type: Optocouplers \- Phototransistor Output

**Pins:**
- AN [pin 1]
- CAT [pin 2]
- COL [pin 4]
- EM [pin 3]

### U\_OPTO2 — [PC817C](https://flux.ai/lcsc/pc817c~nbmh.md)

- Product Info Url: https://lcsc\.com/product\-detail/DIP\-Optocouplers\_PC817C\_C115500\.html
- LCSC Part Number: C115500
- Role: Isolation
- Datasheet URL: https://storage\.googleapis\.com/graviton\-electric\-symbols/document\_assets/lcsc/1809251512\_Wuxi\-China\-Resources\-Huajing\-Microelectronics\-PC817C\_C115500\.pdf
- Manufacturer Part Number: PC817C
- Package or Case Code: DIP\-4\_L4\.6\-W6\.5\-P2\.54\-LS7\.6\-BL
- Role Details: PC817C optocoupler for isolated OVERLOAD\_IN input
- JLCPCB Part Class: Extended Part
- Manufacturer Name: 华润华晶
- Part Type: Optocouplers \- Phototransistor Output

**Pins:**
- AN [pin 1]
- CAT [pin 2]
- COL [pin 4]
- EM [pin 3]

*The full schematic, PCB layout, bill of materials, and interactive design are available at [https://flux\.ai/ddsdasxdas/glecs\-hv\-board\~2h](https://flux.ai/ddsdasxdas/glecs-hv-board~2h).*

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*Generated from [https://flux\.ai/ddsdasxdas/glecs\-hv\-board\~2h](https://flux.ai/ddsdasxdas/glecs-hv-board~2h)*